CN1824339B - Medical implement - Google Patents

Abstract

Translated fromChinese

一种能够可变地维持一定的突出量进而即使是弯曲的探针也能够确实的使穿刺针从前端突出的医疗用器具。该医疗用器具的特征在于，具有：在前端安装有穿刺针(1)的内筒探针(11)；将内筒探针(11)的至少一部分可进退地容纳的外筒探针(12)；固定设置在上述内筒探针(11)的后端的筒状体(2)；可进退地容纳上述筒状体(2)的筐体(5)；可变地调整上述筒状体(2)的行程长度的调整机构(9)，在使上述筒状体(2)后退时将上述穿刺针(1)容纳在上述外筒探针(12)中，在使上述筒状体(2)前进时使上述穿刺针(1)从外筒探针(12)突出，通过由上述调整机构(9)进行的行程长度的调整而可变地调整穿刺针(1)的突出量。

A medical device capable of variably maintaining a constant amount of protrusion so that a puncture needle can reliably protrude from a distal end of a curved probe. The medical device is characterized in that it has: an inner cylinder probe (11) with a puncture needle (1) attached to the front end; an outer cylinder probe (12) that accommodates at least a part of the inner cylinder probe (11) ); the cylindrical body (2) that is fixedly arranged at the rear end of the above-mentioned inner tube probe (11); the housing (5) that accommodates the above-mentioned cylindrical body (2) in a forward and backward manner; variably adjusts the above-mentioned cylindrical body ( 2) The adjustment mechanism (9) of the stroke length accommodates the above-mentioned puncture needle (1) in the above-mentioned outer cylinder probe (12) when the above-mentioned cylindrical body (2) is retreated, and the above-mentioned cylindrical body (2) ) to protrude the puncture needle (1) from the outer cylinder probe (12) when advancing, and adjust the protrusion amount of the puncture needle (1) variably by adjusting the stroke length by the adjustment mechanism (9).

Description

Medical device

Technical field

The present invention relates to a kind of medical device.

Background technology

For medicinal liquid etc. being injected into endoceliac affected part, known have from the jaw of endoscope insert entry needle and be punctured to affected part, thereby inject the situation (for example patent documentation 1) of medicament.Structure as such entry needle is as described below.(a) has the inner core probe that puncture needle is installed at front end, has the mobile chamber of medicinal liquid at this inner core probe, inner lever is installed in the rear end, (b) the urceolus probe is contained in interior intracavity with this inner core probe, by holding the inner core probe is constituted from the outside lever of the outstanding inner core lever of the front end of urceolus probe and the locating surface that contacts that is arranged on the urceolus probe front of the position of the pin that is used for determining to slide in front and back.

For making the puncture needle front end outstanding, go into by the inside lever forward end side pressure that will be contained in the outside lever, thereby inner lever also is pressed into, so puncture needle is outstanding from the front end of urceolus probe along being arranged at the sliding tray of outside lever from the urceolus probe front.At this moment, be provided with locking plate in outer cylinder front end, the root by puncture needle contacts with locking plate, thereby decision is from the outstanding length of the outstanding puncture needle of the front end of locking plate.

But, such medical device, because the length of the puncture needle that can give prominence to is certain, so have such problem: changing the position of using, perhaps want directly to change under the situation of outstanding length of puncture needle, must prepare the medical device of other outstanding length according to patient's state.Also have, because according to position of using or patient's state, must get all the medical device of a plurality of different outstanding length ready, the problem that stock's number increases therefore occurs.

Handle structure as other type, has the inside lever that the interior intracavity of lever externally moves forward and backward, end side inner chamber at the urceolus probe is provided with the conical surface, also be provided with the conical surface in inner lever periphery in addition, when puncture needle is given prominence to, externally inner lever is gone in the lever side pressure, becomes the outstanding state (for example, patent documentation 2) of part that is harmonious at both conical surface.

And then, has the medical device of such type: be provided with the structure of adjusting the outstanding length of puncture needle with the lever of the end that is positioned at probe, set after the fixed outstanding length, make puncture needle give prominence to (for example, patent documentation 3) as other type.In the type, become the structure of adjusting the outstanding length of puncture needle by the setting of lever.

As the common problem points of these medical devices, have following problem: puncture needle is to be in the state that is accommodated in the urceolus probe bores, and still outstanding state is difficult to judge quickly, under the homochromy situation of inner lever and outside lever, more difficultly understands.Might mistakenly puncture needle be extracted from the jaw of endoscope under the situation outstanding from the urceolus probe, perhaps, under situation about inserting, make the jaw inner cavity breakage of endoscope.Also have, make puncture needle under the outstanding state when jaw is extracted, have from the splash probability of medicinal liquid of puncture needle front end.

Also have, in the type of adjusting this outstanding length, rule of thumb as can be known, because the degree of crook of probe is different with the quantity of crooked position, and produce the following this phenomenon avoided structurally wanted, promptly, because probe becomes dual structure, therefore the accumulation of the small bending of inner core probe in the urceolus probe that causes according to the gap of urceolus probe and inner core probe, and in the urceolus probe with the frictional resistance of inner core probe, and the outstanding length of the puncture needle of before endoscope inserts, confirming, outstanding length during with the puncture of reality is different, particularly when carrying out the operation that the endoscope front end is significantly crooked, might be created in the interior frictional resistance of urceolus probe and extremely become big and the outstanding such problem of puncture needle with the inner core probe.

Patent documentation 1:JP opens flat 1-68052 communique in fact.

Patent documentation 2:JP opens flat 2-139649 communique in fact.

The real public clear 63-26351 communique of patent documentation 3:JP.

Summary of the invention

The present invention is In view of the foregoing and proposes that its purpose is to provide a kind of medical device, can keep certain overhang changeably, even and then crooked probe, also can make puncture needle really in the past distal process go out.

According to the present invention, a kind of medical device is provided, it is characterized in that having: the inner core probe that puncture needle is installed at front end; The urceolus probe that at least a portion of above-mentioned inner core probe is held in the mode that can advance and retreat; Be fixedly installed on the cylindrical body of the rear end of above-mentioned inner core probe; The basket that above-mentioned cylindrical body is held in the mode that can advance and retreat; Adjust the guiding mechanism of the haul distance of above-mentioned cylindrical body in variable mode, when above-mentioned cylindrical body is retreated, above-mentioned puncture needle is accommodated in the above-mentioned urceolus probe, when above-mentioned cylindrical body is advanced, above-mentioned puncture needle is outstanding from above-mentioned urceolus probe, by the adjustment of the above-mentioned haul distance of being undertaken, and adjust the overhang of above-mentioned puncture needle in variable mode by above-mentioned guiding mechanism.

Medical device of the present invention is for endoceliac affected parts of injection such as medicinal liquids, by the jaw of endoscope, will the inner core probe insertion of puncture needle will be installed and be punctured to affected part, the utensil that uses under the situations such as injection medicinal liquid at front end.Owing to the guiding mechanism that is provided with the outstanding length of adjusting puncture needle, therefore set after certain outstanding length, make puncture needle outstanding, so outstanding arbitrarily length is necessarily given prominence to.

Also having, in medical device of the present invention, also can be that above-mentioned guiding mechanism comprises: first adjustment part of in prescribed limit above-mentioned haul distance being finely tuned; Second adjustment part of the haul distance that coarse adjustment one-tenth is bigger than the maximum of the haul distance that can be adjusted by first adjustment part.

Also have, in medical device of the present invention, one side that also can be above-mentioned cylindrical body and above-mentioned basket is provided with slide block, the opposing party is provided with the guiding groove of guide shoe, above-mentioned cylindrical body is advanced and retreat by the slip of above-mentioned slide block, simultaneously, above-mentioned guiding mechanism limits the slip of above-mentioned slide block towards above-mentioned puncture needle side in variable mode.

Also have, in medical device of the present invention, also can be that above-mentioned guiding mechanism has at above-mentioned slide block and contacts with above-mentioned slide block when above-mentioned puncture needle side is slided and limit the contact surface of the sliding scale of above-mentioned slide block, this medical device can be adjusted the position of the above-mentioned contact surface on the glide direction of above-mentioned slide block.

And then, in medical device of the present invention, also can be that above-mentioned guiding mechanism has the central shaft identical with above-mentioned basket, it is the cylindrical member that is configured in the rear end side of above-mentioned basket, above-mentioned cylindrical member have with respect to rectangular of above-mentioned central shaft along the inclined plane that the circumferencial direction that with above-mentioned central shaft is the center tilts, be contacted with the sliding scale that above-mentioned slide block is limited on above-mentioned inclined plane by above-mentioned slide block, simultaneously, by being rotated around above-mentioned central shaft, above-mentioned cylindrical member adjusts contact position.By making cylindrical member center on that central shaft is rotated and the overhang that can adjust puncture needle changeably.

Thus, can be made as outstanding arbitrarily length corresponding to the disease example.

Also having, in medical device of the present invention, also can be that above-mentioned inclined plane comprises: with first inclined plane of first angle inclination; Continuously be provided with above-mentioned first inclined plane, with second inclined plane that tilts greater than second angle of above-mentioned first angle, in the above-mentioned cylindrical member, part with first inclined plane is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with second inclined plane constitutes second adjustment part of the coarse adjustment one-tenth haul distance bigger than the maximum of the haul distance that can be adjusted by first adjustment part, be contacted with first state that the above-mentioned sliding scale of above-mentioned slide block is limited on first inclined plane by above-mentioned slide block, with be contacted with second state that the above-mentioned sliding scale of above-mentioned slide block is limited on second inclined plane by above-mentioned slide block, be rotated and change around above-mentioned central shaft by making above-mentioned cylindrical member.

And then, in medical device of the present invention, also can be that above-mentioned inclined plane comprises first inclined plane and the notch with the inclination of first angle, part with first inclined plane is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with above-mentioned notch, constitute second adjustment part of the coarse adjustment one-tenth haul distance bigger than the maximum of the haul distance that can adjust by first adjustment part, be contacted with first state that the above-mentioned sliding scale of above-mentioned slide block is limited on first inclined plane by above-mentioned slide block, limit second state of the above-mentioned sliding scale of above-mentioned slide block with the end that is contacted with notch by above-mentioned slide block, change by above-mentioned cylindrical member is rotated around above-mentioned central shaft.Thus, owing to have the zone that to finely tune outstanding length and the zone of the outstanding length of coarse adjustment simultaneously, so that endoscope front end macrobending and operating under such situation very, since in the urceolus probe with the friction of inner core probe, do not have under the outstanding situation at the first adjustment part puncture needle, by use coarse adjustment portion, and can make puncture needle outstanding.

Also have, in medical device of the present invention, also can be to be positioned under the state of base end side at above-mentioned slide block, when the above-mentioned cylindrical member that is in above-mentioned first state is rotated around above-mentioned central shaft, restriction is from the conversion of first state to second state, be positioned at above-mentioned slide block under the state of above-mentioned puncture needle side, when the above-mentioned cylindrical member that is in above-mentioned first state is rotated around above-mentioned central shaft, allow from of the conversion of first state to second state.From of the conversion of first state, can prevent that puncture needle from moving to big stroke zone at once from finely tuning the zone by restriction to second state.

Also have, in medical device of the present invention, also can be that above-mentioned cylindrical member has the contact locating surface that is provided with corresponding to the position of second adjustment part, when the above-mentioned cylindrical member that is in above-mentioned first state was rotated around above-mentioned central shaft, above-mentioned slide block contacted the locating surface contact and limits conversion to second state with above-mentioned.

Also have, in medical device of the present invention, also can be that above-mentioned cylindrical member has with respect to the plane that comprises above-mentioned central shaft and along the guide surface of above-mentioned inclined, when above-mentioned cylindrical body was retreated, above-mentioned slide block was changed to first state from second state along above-mentioned guide surface.Thus, the operation that operator need not specially and only hold puncture needle just can be altered to first adjustment part, can prevent that the wrong state with outstanding length maximum from using.

Also having, in medical device of the present invention, also can be the outstanding length display part with the outstanding length that shows above-mentioned puncture needle.

Also have, in medical device of the present invention, also can be above-mentioned outstanding length display part, have the scale portion of the numerical value that has along the circumferential direction marked the outstanding length of representing above-mentioned puncture needle in the side of above-mentioned cylindrical member, corresponding with the position of rotation of above-mentioned cylindrical member and show above-mentioned numerical value.Operator can confirm outstanding length with the action of hands, can prevent to puncture with the outstanding length of mistake, so be safe.

According to the present invention, even can provide a kind of can be variable keep certain overhang and then crooked probe and also can make the puncture needle medical device that goes out of distal process in the past really.

In addition, the present invention relates to a kind of medical device, it is characterized in that having: the inner core probe that puncture needle is installed at front end; The urceolus probe that at least a portion of above-mentioned inner core probe is held in the mode that can advance and retreat; Be fixedly installed on the cylindrical body of the rear end of above-mentioned inner core probe; The basket that above-mentioned cylindrical body is held in the mode that can advance and retreat; Adjust the guiding mechanism of the haul distance of above-mentioned cylindrical body in variable mode; When above-mentioned cylindrical body is retreated, above-mentioned puncture needle is accommodated in the above-mentioned urceolus probe, when above-mentioned cylindrical body is advanced, above-mentioned puncture needle is outstanding from above-mentioned urceolus probe, adjustment by the above-mentioned haul distance of being undertaken by above-mentioned guiding mechanism, and adjust the overhang of above-mentioned puncture needle in variable mode, one side of above-mentioned cylindrical body and above-mentioned basket is provided with slide block, the opposing party is provided with the guiding groove of guide shoe, above-mentioned cylindrical body is advanced and retreat by the slip of above-mentioned slide block, above-mentioned guiding mechanism constitutes in variable mode and limits the slip of above-mentioned slide block towards above-mentioned puncture needle side, and, above-mentioned guiding mechanism has the central shaft identical with above-mentioned basket, it is the cylindrical member that is configured in the rear end side of above-mentioned basket, above-mentioned cylindrical member have with respect to rectangular of above-mentioned central shaft along the inclined plane that the circumferencial direction that with above-mentioned central shaft is the center tilts, be contacted with the sliding scale that above-mentioned slide block is limited on above-mentioned inclined plane by above-mentioned slide block, and adjust contact position by above-mentioned cylindrical member is rotated around above-mentioned central shaft, above-mentioned inclined plane comprises: with first inclined plane of first angle inclination; Notch or second inclined plane that tilts with second angle greater than above-mentioned first angle; Above-mentioned second inclined plane is provided with in above-mentioned first inclined plane continuously, part with first inclined plane is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with above-mentioned notch or above-mentioned second inclined plane constitutes second adjustment part of the coarse adjustment one-tenth haul distance bigger than the maximum of the haul distance that can be adjusted by first adjustment part, be contacted with first state that the above-mentioned sliding scale of above-mentioned slide block is limited on first inclined plane by above-mentioned slide block, limit second state of the above-mentioned sliding scale of above-mentioned slide block with the end that is contacted with above-mentioned notch by above-mentioned slide block or above-mentioned second inclined plane, change by above-mentioned cylindrical member is rotated around above-mentioned central shaft.

Description of drawings

Fig. 1 is in the medical device that is illustrated in as the embodiment of the invention, and puncture needle is from an example of the outstanding state of the front end of urceolus probe.In the expression of rupturing in order to omit total length of urceolus probe pars intermedia, in fracture expression portion in order to omit total length with inner core probe fracture expression.

Fig. 2 is in the medical device that is illustrated in as the embodiment of the invention, and puncture needle is contained in the state of the interior intracavity of urceolus probe.In the expression of rupturing in order to omit total length of urceolus probe pars intermedia, in fracture expression portion in order to omit total length with inner core probe fracture expression.

Fig. 3 A～Fig. 3 G is in the medical device that is illustrated in as the embodiment of the invention, the figure of the outstanding state display part in the window of the operating result of outstanding rank adjustment lever of expression and cylindrical body, the example of outstanding rank display part.

Fig. 4 is the exploded view as the shank part of the medical device of the embodiment of the invention, is the figure of expression guiding mechanism of invisible parts as being accommodated in the interior intracavity of basket.

Fig. 5 A, Fig. 5 B are the figure of expression as the specific example of the stroke regulating mechanism of the medical device of the embodiment of the invention.

Fig. 6 A, Fig. 6 B are the figure of expression as the outstanding state of the puncture needle of the medical device of the embodiment of the invention, have represented the example of the peristome of urceolus probe.

The specific embodiment

Below, for embodiments of the present invention, use accompanying drawing to describe.In addition, in whole accompanying drawings, put on identical Reference numeral, suitably omit detailed explanation in the following description for common element.

As shown in Figure 1, medical device has: the inner core probe 11 thatpuncture needle 1 is installed at front end; The urceolus probe 12 that can hold at least a portion of inner core probe 11 with advancing and retreat; Be fixedly installed on the cylindrical body (inner lever) 2 of the rear end of inner core probe 11; The basket (outside lever) 5 that can holdcylindrical body 2 with advancing and retreat; Adjust the guiding mechanism (stroke adjusting structure) 9 of the haul distance ofcylindrical body 2 changeably, whencylindrical body 2 is retreated,puncture needle 1 is contained in the urceolus probe 12, whencylindrical body 2 is advanced, makepuncture needle 1 outstanding from urceolus probe 12, by the adjustment of the haul distance of being undertaken, and adjust the overhang ofpuncture needle 1 changeably by guiding mechanism 9.Also have, the outstanding state display part of the state of the outstanding length ofexpression puncture needle 1 is arranged on the periphery front of cylindrical body 2.And then, in the side of guidingmechanism 9, thescale portion 8 of numerical value of outstanding length of expression puncture needle that had labelling along the circumferential direction, the corresponding and demonstration numerical value of its position of rotation with guidingmechanism 9.

Below, the structure of each one is described.

Inner core probe 11 uses along the mode that long axis direction moves forward and backward with intracavity in urceolus probe 12, and on the other hand, urceolus probe 12 is inserted by the jaw of endoscope.As inner core probe 11 employed materials, because for the foregoing reasons, and the preferred surface slickness is good, also has can estimate the situation of the adverse current of confirming blood through probe at the root of pin after puncture, so preferably have the material of the transparency.And then, in order to be punctured to affected part from the outstanding probe of endoscope front end, preferably when puncture probe not crooked, also have the material that has the elasticity of flexure of appropriateness when intracavity moves forward and backward in the jaw at the endoscope of bending, preferably use synthetic resin such as polyflon (PTFE), tetrafluoraoethylene-hexafluoropropylene copolymer resin (FEP), polyamide-based resin.

Urceolus probe 12 uses in the mode that the jaw by endoscope inserts, so it is same with inner core probe 11, the preferred surface slickness is good, also have and see through probe can estimate the situation of the adverse current of confirming blood, the material that therefore preferably has the transparency at the root of pin after puncture.Thus, same as material with inner core probe 11, preferably use synthetic resin such as polyflon (PTFE), tetrafluoraoethylene-hexafluoropropylene copolymer resin (FEP), polyamide-based resin.

As the size of probe, because inner core probe 11 is in order to flow into full-bodied medicinal liquid, so if too the detailed rules and regulations medicinal liquid injects the resistance change greatly, if operability was bad when too thick then medicinal liquid injection resistance was too little, therefore, as internal diameter, be preferably more than the 0.4mm, below the 1.2mm.The external diameter of the thickness of the pressure when external diameter so long as have can be stood medicinal liquid and injects get final product, without special provision, but needs the size of consideration urceolus probe 12.

The internal diameter of urceolus probe 12, if the gap of the internal diameter of the external diameter of inner core probe 11 and urceolus probe 12 is narrow and small, then frictional resistance becomes big whenpuncture needle 1 being given prominence to or hold, also have if too wide then in bending in the bending section of endoscope, in mode along urceolus probe 12 internal diameters of bending, inner core probe 11 outer diameter parts are adjacent in the curved side, therefore the length of inner core probe 11 shortens, therefore be shorter than the outstanding length that sets, be preferably more than the big 0.1mm of external diameter than inner core probe 11, the internal diameter below the 0.3mm.As external diameter, if insert smoothly, can not hinder and supply gas, attract to get final product at the jaw of endoscope, size is regulation not.

And then, as length, though different from the position that inner core probe 11, urceolus probe 12 puncture simultaneously, preferred 1.5～2.5m.

Be the inner core probe 11 that prevents to stretch out frombasket 5 and the bending of urceolus probe 12, bending can be prevented to manage 13 in the mode of the outer diameter part that covers urceolus probe 12 with adhering or mode such as crimping is installed on the basket 5.It is the pipes that are used to prevent the bending of inner core probe 11 and urceolus probe 12 that bending prevents to manage 13, so preferred rubber-like material, preferred polyamide resinoid, soft PVC resin synthetic resin such as (PVC) are such has appropriate elastic resin.As length frombasket 5, preferred 30mm～60mm.Also having, can prevent bending as long as obtain suitable flexural rigidity, also is a preferred example and use heat-shrinkable tube.

Gravel size decision 20G～25G as thepuncture needle 1 of the front end that is installed in inner core probe 11, select to get final product according to position of using and medicinal liquid, also have as length from theoutstanding puncture needle 1 of urceolus probe 12 front ends, preferred 2～8m, this situation also is to select to get final product according to the position of using.

Cylindrical body 2 is arranged on the rear end side of inner core probe 11, can makepuncture needle 1 from 12 turnover of urceolus probe by makingcylindrical body 2 advance and retreat.And, be the medical device that constitutes as follows: any one party ofcylindrical body 2 orbasket 5 is provided withslide block 3, the opposing party is provided with the guiding groove ofguide shoe 3,cylindrical body 2 is advanced and retreat by the slip ofslide block 3, simultaneously, guidingmechanism 9 limits the slip ofslide block 3 towards the puncture needle side changeably.

As the shape ofcylindrical body 2, in order to connect the syringe that is used for injecting endways medicinal liquid, and inject full-bodied medicinal liquid, need become the shape that can connect the syringe that guides conical in shape.Also have, use withbasket 5 one owing to be inserted in the inner chamber ofbasket 5, thus as material, need be same withbasket 5, need be the material that has patience with respect to the medicinal liquid that uses.

Basket 5 is members thatcylindrical body 2 can be held with advancing and retreat.As the shape ofbasket 5, whenpuncture needle 1 is given prominence to,basket 5 profiles part is kept with hands, and be pressed intocylindrical body 2, so preferably drum shape or polygon prism shape, but if the shape of easily holding gets final product, be not particularly limited.Also have, as material, preferably good, the cheap and light plastics of processability, and then preferred ABS resin, polycarbonate resin, hard polyvinylchloride resin.

Guiding mechanism 9 is become to compare second adjustment part of the big haul distance of the maximum of the haul distance that can be adjusted by first adjustment part by fine setting first adjustment part of haul distance and coarse adjustment in prescribed limit.Also have, guidingmechanism 9 has atslide block 3 and contacts withslide block 3 whenpuncture needle 1 side is slided and limit the contact surface of the sliding scale ofslide block 3, and can adjust the position of the contact surface on the glide direction ofslide block 3.

And, be such medical device: guidingmechanism 9 has identical central shaft withbasket 5, it is the cylindrical member that is configured in the rear end side ofbasket 5, cylindrical member has with respect to the edge is the inclined plane of the circumferencial direction inclination at center with the central shaft with vertical of central shaft, be contacted with the sliding scale thatslide block 3 is limited on the inclined plane byslide block 3, be rotated and adjust contact position by making cylindrical member center on central shaft simultaneously.

Other adjustment of outstanding level is to be undertaken by the guidingmechanism 9 with outstandinglength adjustment lever 7 linkage works.Promptly, shown in Fig. 3 A～Fig. 3 G, the distance that will contactlocation division 10 as theslide block 3 of the reciprocating sliding distance ofslide block 3 with slide block is adjusted by the contact of the slide block on the guidingmechanism 9location division 10, and adjust distance thatcylindrical body 2 is gone into tobasket 5 side pressures, obtainpuncture needle 1 from the outstanding length of urceolus probe 12 front ends thereby adjust.

The operations linkage of guidingmechanism 9 and outstandinglength adjustment lever 7, and by spool a rotation as center identical with the axle ofcylindrical body 2 long axis directions driven, thereby the situation that can change with the position of rotation ofcylindrical body 2 relation is important feature, according to the position of rotation ofcylindrical body 2, the air line distance ofslide block 3 andcontact surface 10 changes, adjust the distance that is pressed into ofcylindrical body 2 thus, thereby adjust the outstanding length of puncture needle 1.Therefore, it not necessarily must be the such modular construction of exploded view of Fig. 4, for example externally the inner face of lever is wholely setstroke regulating mechanism 9, incylindrical body 2slide block 3 and outstandinglength adjustment lever 7 are fixed with one or adhesion or other method, owing to makingcylindrical body 2, the operation of giving prominence tolength adjustment lever 7 is rotated around the long axis direction axle, the position of rotation ofcylindrical body 2 andstroke regulating mechanism 9 is changed, even adjust and obtain the structure of the air line distance ofslide block 3 andcontact surface 10 thus, also can access same effect, consider that decision operating position and assembling procedure etc. get final product.

Contact surface 10 is shown in Fig. 5 A, constitute by first inclined plane 23 and second inclined plane 24, first inclined plane 23 is parts of the haul distance of SelectiveControl slide block 3 by said structure, be not limited to such as shown in the figure slick curve shape, also can be the shape with difference in height of multistage or more complicated curve shape etc., consider outstanding other quantity of length level of wanting thepuncture needle 1 adjusted and determine to get final product, but pass through curve shape, can adjust successive outstanding length, then even more ideal.Second inclined plane 24 is with than first inclined plane 23 and the longer mode of the haul distance ofslide block 3 constitutes, and it is maximum that the outstanding length ofpuncture needle 1 is generally.

Such as has been described, since the increase of the gap of urceolus probe 12 and inner core probe 11 and frictional resistance when the front end that makes endoscope is extremely crooked and might be in the stroke adjusting range of adjusting common outstandinglength puncture needle 1 outstanding, for addressing this problem first inclined plane 23 and second inclined plane 24 are set on thecontact surface 10 ofstroke regulating mechanism 9 shown in Fig. 5 A, Fig. 5 B.Because 24 to the first inclined planes 23, second inclined plane further prolong haul distance, therefore during the outstanding deficiency of thepuncture needle 1 that brings at the frictional resistance of urceolus probe 12 and inner core probe 11/bad generation to 24 conversions of second inclined plane and further makepuncture needle 1 outstanding, and can give prominence to punctureneedle 1 really.Second inclined plane 24 is thatpuncture needle 1 is outstanding from urceolus probe 12 fully, and it is maximum that outstanding length is generally.

On second inclined plane 24, as shown in Figure 6A, supposed not onlypuncture needle 1, inner core probe 11 is also by the outstanding situation of urceolus probe 12 front ends.The outstanding length ofpuncture needle 1 is to give prominence to length from the front end ofpuncture needle 1 to the length conduct of thepuncture needle 1 of the front end of inner core probe 11 itself.Might from the puncture the purpose position, not onlypuncture needle 1, under the situation that inner core probe 11 also thrusts in bodily tissue, shown in Fig. 6 B with peristome 19 diameter reduction of urceolus probe 12 front ends, onlypuncture needle 1 can insert perforation, thereby inner core probe 11 can not insert perforation, has prevented that thus the face that contacts with bodily tissue when puncture from becoming big and situation that probe also thrusts in biological tissue, and can get rid of the danger of perforation, therefore become preferred example.

Because being the outstanding length ofpuncture needle 1, second inclined plane 24 often is maximum, so it is not preferred taking it all round from peace always to be in the situation on second inclined plane 24 at ordinary times.This problem is to solve by theguide surface 14 that is provided with shown in Fig. 5 A, Fig. 5 B.The operation of holding ofpuncture needle 1 is slidedcylindrical body 2, andslide block 3 contacts with guide surface 14.Becauseguide surface 14 be the inclined plane,, can change to first inclined plane 23 so,stroke regulating mechanism 9 is rotated around the axle center if duringslide block 3 contacts.Thus, pay special attention to, only just can be altered to first inclined plane 23, and the state that is maximum with outstanding length mistakenly that can prevent uses with the operation of holdingpuncture needle 1 without the technical staff.

The inclined plane comprises: with first inclined plane 23 of first angle inclination; Be provided with continuously with first inclined plane 23, with second inclined plane 24 that tilts greater than second angle of first angle, among the cylindrical member, part with first inclined plane 23, be formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with second inclined plane 24 constitutes second adjustment part of coarse adjustment for the haul distance bigger than the maximum of the haul distance that can be adjusted by first adjustment part, be contacted with first state that the sliding scale ofslide block 3 is limited on first inclined plane 23 byslide block 3, be contacted with second state that the sliding scale ofslide block 3 is limited on second inclined plane 24 byslide block 3, be rotated and change by making cylindrical member center on central shaft.

Also have, shown in Fig. 5 B, as other embodiments, also can be following such medical device: the inclined plane comprises first inclined plane 23 and the notch 25 with the inclination of first angle, part with first inclined plane 23 is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with notch 25, constitute second adjustment part of coarse adjustment for the haul distance bigger than the maximum of the haul distance that can adjust by first adjustment part, be contacted with first state of the sliding scale of first inclined plane, 23restriction slide blocks 3 byslide block 3, second state of the sliding scale ofslide block 3 is limited in the end that is contacted with notch 25 byslide block 3, rotates and changes by making cylindrical member center on central shaft.

Be positioned atslide block 3 under the state of base end side, when the cylindrical member that is in first state is rotated around central shaft, restriction is from the conversion of first state to second state, be positioned atslide block 3 under the state ofpuncture needle 1 side, when the cylindrical member that is in first state is rotated around central shaft, permission is from the conversion of first state to second state, cylindrical member has the contact locating surface 15 that is provided with corresponding to the position of second adjustment part, when the cylindrical member that is in first state was rotated around central shaft,slide block 3 limited the conversion to second state with contacting the locating surface contact.

When this is the outstanding length adjustment operation of having considered under the state that holdspuncture needle 1, it is not the situation of but transferring to second inclined plane 24 for own hope, and supposed situation about puncturing under the state of outstanding length for maximum mistakenly, but this has solved by contact locating surface 15 is set shown in Fig. 5 A, Fig. 5B.Be slide block 3 and contact locating surface 15 contacts, the action of restrictionstroke regulating mechanism 9, thereby can prevent from transferring to the situation on second inclined plane 24 under the operation unintentionally, become continuous face with above-mentionedguide surface 14 and can realize outstanding and the smooth operation held but preferred embodiment.

Cylindrical member has with respect to the plane that comprises central shaft and along the guide surface of inclined, when rotating making cylindrical member center on central shaft, along guidesurface guide shoe 3, changes between first state and second state.

Thescale portion 8 of outstanding length withexpression puncture needle 1,scale portion 8 be in the side of cylindrical member, along the numerical value of the outstanding length of circumferencial direction markexpression puncture needle 1, and demonstration numerical value corresponding with the position of rotation of cylindrical member.

Thewindow 6 of outstanding length rank of expression and outstanding state is arranged on the part onbasket 5 peripheries, and as the position, the position of easily seeing so long as do not hide when holdingbasket 5 gets final product, and does not limit especially.Also have, in the present embodiment, also the track asslide block 3 uses, but, not necessarily need centralized function, even each functional separation is also no problem.But,, therefore can effectively apply flexibly, so be more preferably the such mode of present embodiment because the outstanding state ofpuncture needle 1 is also represented in the mobile and position ofslide block 3.

As the outstandingstate display part 4 on the periphery ofcylindrical body 2, for a glance just can be judged, preferably when being in outstanding state and being in, become contrast color when holding state, in the present embodiment, become contrast color by color withcylindrical body 2, and can clearly represent outstanding state and hold state, so be preferred.Also have, the outstandingstate display part 4 in thewindow 6 must clearly be estimated identification, therefore by with the periphery ofbasket 5 on color become contrast color, contrast obviously and the property estimated raising, so be preferred.The color of outstandingstate display part 4 andbasket 5 andcylindrical body 2 gets final product with the painted etc. of the attaching of silk screen printing and thermoprint printing or sealing member etc., parts self, and especially method is unqualified.

Below, the effect of the medical device of present embodiment is described.

The medical device of present embodiment has: the inner core probe 11 thatpuncture needle 1 is installed at front end; The urceolus probe 12 that at least a portion of this inner core probe 11 can be held with advancing and retreat; Be fixedly installed on thecylindrical body 2 of the rear end of inner core probe 11; Thebasket 5 that can holdcylindrical body 2 with advancing and retreat; Adjust theguiding mechanism 9 of the haul distance ofcylindrical body 2 changeably, with whencylindrical body 2 is retreated,puncture needle 1 is accommodated in the urceolus probe 12, whencylindrical body 2 is advanced, punctureneedle 1 is outstanding from urceolus probe 12, adjustment by the haul distance of being undertaken by guidingmechanism 9 and the mode of adjusting the overhang ofpuncture needle 1 changeably constitute, thereby theguiding mechanism 9 of the outstanding length of adjustingpuncture needle 1 is set, makepuncture needle 1 outstanding after certain outstanding length so set, outstanding arbitrarily length is necessarily given prominence to.

Also have, become second adjustment part 24 of the haul distance bigger to constitute by guidingmechanism 9 by fine setting first adjustment part 23 of haul distance and coarse adjustment in prescribed limit, give prominence to length arbitrarily corresponding to the disease example thereby can become than the maximum of the haul distance that can adjust by first adjustment part 23.

The inclined plane comprises first inclined plane 23 and the notch 25 with the inclination of first angle, part with first inclined plane 23 is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit, part with notch 25, constitute second adjustment part of the coarse adjustment one-tenth haul distance bigger than the maximum of the haul distance that can adjust by first adjustment part, be contacted with first state that the sliding scale ofslide block 3 is limited on first inclined plane 23 byslide block 3, limit second state of the sliding scale ofslide block 3 with the end that is contacted with notch 25 byslide block 3, be rotated and change by making cylindrical member center on central shaft, thus can be to giving prominence to the zone that length is finely tuned owing to having concurrently, with the zone that outstanding length is carried out coarse adjustment, so make the endoscope front end significantly crooked and operate under such situation, even owing to urceolus probe 12 in, make under the situation that first adjustment part, 23puncture needles 1 do not have to give prominence to the friction of inner core probe 11, by use coarse adjustment portion, and can makepuncture needle 1 outstanding.

Also have, be positioned atslide block 3 under the state of base end side, when the cylindrical member that is in first state is rotated around central shaft, restriction is from the conversion of first state to second state, be positioned at slide block under the state of puncture needle side, when the cylindrical member that is in first state is rotated around central shaft, permission is from the conversion of first state to second state, thus, from of the conversion of first state, can prevent thatpuncture needle 1 is from finely tune the situation that move to big stroke zone in the zone at once by restriction to second state.

Also have, cylindrical member has with respect to the plane that comprises central shaft and along the guide surface of inclined, by when cylindrical body is retreated, slide block is changed to first state from second state along guide surface, thereby operator need not be specially, just can only be altered to first adjustment part 23, can prevent from when outstanding length is maximum, to use mistakenly with holding the operation ofpuncture needle 1.

Also can be used as the medical device of following structure, outstandinglength display part 4 in the side of cylindrical member, has thescale portion 8 that has marked the numerical value of the outstanding length of representingpuncture needle 1 along circumferencial direction, shows numerical value corresponding to the position of rotation of cylindrical member.Operator just can confirm outstanding length with the action of hands, thus can prevent to puncture with the outstanding length of mistake, so safety.

Below, by making use-case explanation the present invention.

Thepuncture needle 1 of medical device of the present invention for safety and protection puncture resistance, remains on the interior intracavity of urceolus probe 12 front ends before use, as shown in Figure 3A, byslide block 3 andwindow 6 fixed positions, can not makepuncture needle 1 outstanding mistakenly.Under the state of the inner chamber that punctureneedle 1 is remained on urceolus probe 12, by the leading section of urceolus probe 12 jaw by endoscope, and with urceolus probe 12 front end guidance to affected part.Rotate outstandinglength adjustment lever 7 here as the outstanding preparation ofpuncture needle 1, when makingstroke regulating mechanism 9 actions, will be presented at the outstanding length rank of display setting for wishing of the outstandingrank display part 8 in thewindow 6.

Under this state, punctureneedle 1 is not outstanding, but inwindow 6, can see the outstandingstate display part 4 that is coloured to the color different with the color ofcylindrical body 2 self, and the expression pin is in the state that can give prominence to.Shown in Fig. 3 A～Fig. 3 G, outstanding length rank is 3～5 in first inclined plane 23, adjusts in this scope in the present embodiment.Be inslide block 3 base end sides and do not have theoutstanding piece 3 of sliding in state to contact, for the action that suppressesstroke regulating mechanism 9 is not moved to second adjustment part 24,25 with contacting locating surface 15 at puncture needle 1.It becomes the safety device that the outstanding length of avoidingpuncture needle 1 is often used for the mistake of maximum second adjustment part (24,25).

If the adjustment of outstanding length finishes, thencylindrical body 2 to be gone into tobasket 5 side pressures, the slide block in makingslide block 3 and seeingwindow 6contacts location division 10 contacts, and fixes.Inner core probe 11 is pressed into the length thatcylindrical body 2 is pressed into, and punctureneedle 1 forwards advances in urceolus probe 12 inner chambers, from the outstanding length rank part of onlyoutstanding puncture needle 1 setting of urceolus probe 12 front ends.Here, the outstandingstate display part 4 ofwindow 6 becomes and cannot see, and can see the color ofcylindrical body 2, andexpression puncture needle 1 is outstanding state.

The outstanding state ofpuncture needle 1 is confirmed with the monitor of endoscope, confirmed the outstanding length of actual puncture needle 1.Judge the outstanding length that do not reach setting or when outstanding and outstanding length is to the maximum under the good situation, keeping the state ofoutstanding puncture needle 1 and the further outstandinglength adjustment lever 7 of operation is transformed into second adjustment part 24,25.Here, by operationcylindrical body 2puncture needle 1 is ejected to projected direction, punctureneedle 1 that makes that can be certain is given prominence to.

And, outstanding 1 pair of affected part of puncture needle is punctured, though not shown, the syringe of the end by being installed incylindrical body 2 and medicament etc. is injected affected part.If the injection of medicinal liquid finishes, thencylindrical body 2 is operated to the direction of extracting frombasket 5, and punctureneedle 1 is contained in intracavity in the urceolus probe 12.At this moment, even makepuncture needle 1 outstanding by second adjustment part 24,25, holding operation by this makesslide block 3push guide surface 14 to makestroke regulating mechanism 9 action, transfer to first inclined plane 23, therefore even continuing to makepuncture needle 1 outstanding and carry out under the situation of puncture procedure, also can avoid remaining on second adjustment part 24,25 mistakenly and outstanding situation.

Whole punctures and medicinal liquid inject and finish, and then the present invention are pulled out from endoscope, then end-of-job on hand.

Medical device of the present invention, even the outstanding length with puncture needle can easily be adjusted by operating outstanding length adjustment lever at probe and apply the device that puncture needle also can be given prominence to really when crooked, also have, can be easy to confirm to adjust the result by the demonstration in the window on the basket, and then also can be easy to confirm the outstanding state of puncture needle, so the problem that the raising and the operation mistake of operability are brought can be prevented trouble before it happens, extensive use aspect the medicinal liquid injection of endoscopic therapy.

Claims (8)

1. medical device is characterized in that having:

The inner core probe of puncture needle is installed at front end;

The urceolus probe that at least a portion of above-mentioned inner core probe is held in the mode that can advance and retreat;

Be fixedly installed on the cylindrical body of the rear end of above-mentioned inner core probe;

The basket that above-mentioned cylindrical body is held in the mode that can advance and retreat;

Adjust the guiding mechanism of the haul distance of above-mentioned cylindrical body in variable mode;

When above-mentioned cylindrical body was retreated, above-mentioned puncture needle was accommodated in the above-mentioned urceolus probe, and when above-mentioned cylindrical body was advanced, above-mentioned puncture needle was outstanding from above-mentioned urceolus probe,

By the adjustment of the above-mentioned haul distance of being undertaken, and adjust the overhang of above-mentioned puncture needle in variable mode by above-mentioned guiding mechanism,

One side of above-mentioned cylindrical body and above-mentioned basket is provided with slide block, and the opposing party is provided with the guiding groove of guide shoe, and above-mentioned cylindrical body is advanced and retreat by the slip of above-mentioned slide block,

Above-mentioned guiding mechanism constitutes in variable mode and limits the slip of above-mentioned slide block towards above-mentioned puncture needle side, and above-mentioned guiding mechanism has the central shaft identical with above-mentioned basket, is the cylindrical member that is configured in the rear end side of above-mentioned basket,

Above-mentioned cylindrical member have with respect to rectangular of above-mentioned central shaft along the inclined plane that the circumferencial direction that with above-mentioned central shaft is the center tilts,

Be contacted with the sliding scale that above-mentioned slide block is limited on above-mentioned inclined plane by above-mentioned slide block, and adjust contact position by above-mentioned cylindrical member is rotated around above-mentioned central shaft,

Above-mentioned inclined plane comprises: with first inclined plane of first angle inclination; Notch or second inclined plane that tilts with second angle greater than above-mentioned first angle;

Above-mentioned second inclined plane is provided with in above-mentioned first inclined plane continuously,

Part with first inclined plane is formed in first adjustment part of the above-mentioned haul distance of fine setting in the prescribed limit,

Part with above-mentioned notch or above-mentioned second inclined plane constitutes second adjustment part of the coarse adjustment one-tenth haul distance bigger than the maximum of the haul distance that can be adjusted by first adjustment part,

By above-mentioned slide block be contacted with first inclined plane limit above-mentioned slide block above-mentioned sliding scale first state and be contacted with the end of above-mentioned notch or second state that the above-mentioned sliding scale of above-mentioned slide block is limited on above-mentioned second inclined plane by above-mentioned slide block, change by above-mentioned cylindrical member is rotated around above-mentioned central shaft.

2. the medical device of putting down in writing as claim 1 is characterized in that, above-mentioned guiding mechanism comprises:

First adjustment part of in prescribed limit, above-mentioned haul distance being finely tuned;

Second adjustment part of the haul distance that coarse adjustment one-tenth is bigger than the maximum of the haul distance that can be adjusted by first adjustment part.

3. the medical device of putting down in writing as claim 1 is characterized in that, above-mentioned guiding mechanism has at above-mentioned slide block and contacts with above-mentioned slide block when above-mentioned puncture needle side is slided and limit the contact surface of the sliding scale of above-mentioned slide block,

This medical device can be adjusted the position of the above-mentioned contact surface on the glide direction of above-mentioned slide block.

4. the medical device of putting down in writing as claim 1 is characterized in that,

Be positioned at above-mentioned slide block under the state of base end side, when the above-mentioned cylindrical member that is in above-mentioned first state is rotated around above-mentioned central shaft, limit from of the conversion of first state to second state,

Be positioned at above-mentioned slide block under the state of above-mentioned puncture needle side, when the above-mentioned cylindrical member that is in above-mentioned first state is rotated around above-mentioned central shaft, allow from of the conversion of first state to second state.

5. the medical device of putting down in writing as claim 4 is characterized in that, above-mentioned cylindrical member has the contact locating surface that is provided with corresponding to the position of second adjustment part,

When the above-mentioned cylindrical member that is in above-mentioned first state was rotated around above-mentioned central shaft, above-mentioned slide block contacted the locating surface contact and limits conversion to second state with above-mentioned.

6. the medical device of putting down in writing as claim 4 is characterized in that,

Above-mentioned cylindrical member has with respect to the plane that comprises above-mentioned central shaft and along the guide surface of above-mentioned inclined,

When above-mentioned cylindrical body was retreated, above-mentioned slide block was changed to first state from second state along above-mentioned guide surface.

7. the medical device of putting down in writing as claim 1 is characterized in that, has the outstanding length display part of the outstanding length that shows above-mentioned puncture needle.

8. the medical device of putting down in writing as claim 7, it is characterized in that, above-mentioned outstanding length display part, the scale portion that has the numerical value that has along the circumferential direction marked the outstanding length of representing above-mentioned puncture needle in the side of above-mentioned cylindrical member, corresponding with the position of rotation of above-mentioned cylindrical member and show above-mentioned numerical value.

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