CN217244697U - Puncture needle - Google Patents

Abstract

The utility model relates to a puncture needle, include outer needle subassembly and wear to locate the interior needle subassembly in the outer needle subassembly, outer needle subassembly includes outer needle file and the outer needle pipe of locating outer needle file one end, outer needle file further includes outer needle handheld portion and is formed respectively in outer needle handheld portion near the first installation department of outer needle pipe one end and keeps away from the second installation department of outer needle pipe one end, interior needle subassembly includes inner needle file and the interior needle bar of locating inner needle file one end, and inner needle bar inserts outer needle file and then inserts outer needle pipe from keeping away from outer needle pipe one end of outer needle file, and inner needle file is connected with outer needle file's second installation department detachably, wherein, the surface of outer needle handheld portion forms at least a set of radial relative handheld face, the surface of outer needle handheld portion is in the one end that the handheld face is close to outer needle pipe forms round uplift supporting part. The puncture needle solves the possibility that the hands of an operator slip off from the puncture needle when large resistance is generated in the puncture process, avoids the problem of unsmooth needle insertion, and relieves the pain of patients.

Description

Puncture needle

Technical Field

The present application relates to ultrasound interventional medical devices and, more particularly, to a puncture needle.

Background

In the medical field, bone and soft tissue tumors are diseases seriously harming human health and life, the incidence of diseases gradually rises in recent years, the age of the diseases gradually falls, and early detection, correct diagnosis and timely treatment have important influence on the disease after healing. The correct diagnosis requires three combinations of clinical, imaging and pathology. For example, a puncture needle is used to take a part of tissue or cell of a human body, accurately find a nerve, or deliver some intervention object in order to diagnose a lesion. In this case, since it is necessary to accurately grasp the position of the puncture needle, particularly the position of the needle tip, it is necessary to confirm an image by the ultrasonic diagnostic apparatus. The use of the puncture needle is described in detail in U.S. patent application publication No. US20180116551a1, published as 2018, 5 and 3. Because the gripping mode diverse of operating personnel to the puncture needle, ordinary pjncture needle has the risk of rolling off on operation table surface, and the gripping position structure is not outstanding enough, and the resistance is great when ordinary pjncture needle pierces the human body, need just can pierce the human body with great strength, and operator's hand slips from the pjncture needle easily, produces the problem that the needle insertion is not smooth and easy to patient's misery has been increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present application is to provide a puncture needle which is convenient to grasp and can provide stress support for grasping fingers, aiming at the above defects in the prior art.

The technical scheme adopted by the application for solving the technical problem is as follows: the utility model provides a puncture needle, includes outer needle subassembly and wears to locate interior needle subassembly in the outer needle subassembly, outer needle subassembly includes outer needle file and the outer needle pipe of locating outer needle file one end, outer needle file further includes outer needle handheld portion and is formed respectively in outer needle handheld portion near the first installation department of outer needle pipe one end and the second installation department of keeping away from outer needle pipe one end, interior needle subassembly includes interior needle file and the interior needle bar of locating inner needle file one end, interior needle bar is followed outer needle pipe one end of keeping away from of outer needle file is inserted outer needle file and then is inserted outer needle pipe, interior needle file with the second installation department detachably of outer needle file connects, wherein, the surface of outer needle handheld portion forms at least a set of radial relative handheld face, the surface of outer needle handheld portion is in the handheld face is close to the one end of outer needle pipe and forms the round uplift supporting part.

In one embodiment of the needle according to the application, the outer surface of the outer needle handle forms a first set of handle surfaces facing the direction of the outer needle tip and a second set of handle surfaces perpendicular to the first set of handle surfaces.

In one embodiment of the needle according to the application, the outer surface of the outer needle grip forms a chamfer between two adjacent grips.

In one embodiment of the needle according to the application, the outer surface of the outer needle grip forms a transition curve between each grip surface and the raised support.

In one embodiment of the puncture needle according to the application, the inner needle seat is connected with the second installation part of the outer needle seat in a buckling way.

In one embodiment of the puncture needle according to the present application, the inner needle holder includes an inner needle holding portion and a mounting portion formed at the inner needle holding portion near one end of the inner needle rod, a locking arm further extends from one end of the outer side of the inner needle holding portion near the inner needle rod, and a matching groove and a boss structure are provided between the inner surface of the locking arm and the outer surface of the second mounting portion to lock each other when the mounting portion of the inner needle holder is inserted into the second mounting portion of the outer needle holder.

In one embodiment of the puncture needle according to the application, the outer surface of the second mounting part of the outer needle base is further provided with a first limiting bulge and a second limiting bulge corresponding to two sides of the buckling arm, and the first limiting bulge and the second limiting bulge are respectively provided with a first limiting surface and a second limiting surface which are abutted against two side surfaces of the buckling arm.

In one embodiment of the puncture needle according to the present application, the puncture needle further includes a stopper fastened to the second mounting portion of the outer hub and the inner needle holding portion to restrict axial movement of the second mounting portion and the inner needle holding portion.

According to an embodiment of the puncture needle, the limit buckle comprises a first limit part and a second limit part which are oppositely arranged and a connecting part connected between the first limit part and the second limit part, the first limit part is provided with a limit hole which is matched with a limit boss formed by the inner needle hand-held part and far away from one end face of the inner needle rod, the second limit part is provided with two elastic surrounding parts which surround the second mounting part of the outer needle base from two sides, the limit buckle is buckled on the limit boss of the inner needle hand-held part through the limit hole on the first limit part and wraps the two elastic surrounding parts of the second limit part around the second mounting part of the outer needle base, and one end face of the second limit part far away from the inner needle rod is abutted against a third limit bulge arranged on the second mounting part.

In one embodiment of the puncture needle according to the application, the puncture needle further comprises a vernier sleeved on the outer needle tube and a protective sleeve sleeved on the first installation part of the outer needle base so as to accommodate the outer needle tube, the vernier and the inner needle rod in the protective sleeve.

The puncture needle has the following beneficial effects: according to the puncture needle provided by the embodiment of the application, the relative hand-held surface is formed on the outer surface of the hand-held part of the outer needle to provide an obvious gripping part, and the stress supporting surface is provided for the gripped fingers through the raised supporting part, so that the possibility that the hand of an operator slips off from the puncture needle when large resistance is generated in the puncture process is solved, the problem of unsmooth needle insertion is avoided, and the pain of a patient is relieved. According to the puncture needle disclosed by the embodiment of the application, the degree of freedom of the inner needle assembly relative to the axial movement of the outer needle assembly is limited through the matching of the buckling connection structure or the limiting buckle between the inner needle assembly and the outer needle assembly and the inner needle assembly and the outer needle assembly, the risk of the inner needle and the outer needle being separated in the puncture process is reduced, and the safety and the effectiveness of puncture are improved.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of an assembled configuration of a needle of the present application in accordance with one embodiment;

FIG. 2 is a schematic exploded view of the needle of FIG. 1;

FIG. 3 is a schematic structural view of an outer needle assembly in one embodiment of the present application;

FIG. 4 is a schematic structural view of an inner needle assembly in one embodiment of the present application;

FIG. 5 is a sectional view of the outer needle assembly of FIG. 3 assembled with the inner needle assembly of FIG. 4;

figure 6 is a schematic view of a needle design according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Also, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1 and 2, apuncture needle 100 according to an embodiment of the present application is mainly composed of aninner needle assembly 10, anouter needle assembly 20, acursor 30 and aprotective sleeve 40, wherein theinner needle assembly 10 includes aninner needle holder 12 and aninner needle rod 11 disposed at one end of theinner needle holder 12, theouter needle assembly 20 includes anouter needle holder 22 and anouter needle tube 21 disposed at one end of theouter needle holder 22, theinner needle rod 11 of theinner needle assembly 10 passes through theouter needle holder 22 and is inserted into theouter needle tube 21, thecursor 30 is sleeved on theouter needle tube 21 to facilitate the identification of scales on theouter needle tube 21 by a user, and theprotective sleeve 40 is sleeved on theouter needle holder 22 to accommodate theouter needle tube 21, thecursor 30 and theinner needle rod 11 therein to provide a protective effect.

Referring specifically to fig. 3, theouter needle assembly 20 is mainly assembled from theouter needle holder 20 and theouter needle tube 21, for example, theouter tube 21 may be fixedly mounted in themounting hole 224 of theouter needle holder 22 by means of, for example, adhesive (see fig. 5). Theouter needle cannula 21 has abeveled needle tip 211. Theouter hub 22 further includes afirst mounting portion 221, an outerneedle holding portion 222, and asecond mounting portion 223, thefirst mounting portion 221 and thesecond mounting portion 223 being formed at an end of the outerneedle holding portion 222 close to the outer needle tube and an end far from the outer needle tube, respectively. Thefirst mounting portion 221 has acylindrical surface 2211 for mounting theprotective sleeve 40. Theouter needle holder 222 is substantially cylindrical, a first group ofholding surfaces 2222 facing the inclined surface of theneedle tip 211 of theouter needle tube 21 and a second group ofholding surfaces 2223 perpendicular to the first group ofholding surfaces 2222 are formed on the outer surface of theouter needle holder 222, and the first group ofholding surfaces 2222 and the second group ofholding surfaces 2223 are arranged to be opposite to each other in the radial direction. The operator can identify the orientation of theneedle tip 211 by grasping a set of hand-heldsurfaces 2222 or 2223 in different orientations. The two sets ofgripping surfaces 2222 and 2223 are preferably flat or curved surfaces that are concave toward the axis of the outer needlecannula hand piece 22 to facilitate finger gripping. Achamfer structure 2224, such as an arc chamfer, is further formed on the outer surface of the outer needlehandheld portion 22 between the two adjacenthandheld surfaces 2222 and 2223, so that the outer needlehandheld portion 22 is smooth as a whole without sharp edges, and the hand feeling of the operator for rotating thepuncture needle 100 during the puncture process is improved. Further, a circle of raisedsupport 2221 is formed on the outer surface of the outerneedle holding part 22 at one end of the two sets ofholding surfaces 2222 and 2223 close to theouter needle tube 21, and a transition arc 2225 (see fig. 5) is formed between eachholding surface 2222 and 2223 and the raisedsupport 2221, so that a force bearing surface is provided for fingers when the fingers of an operator are held on theholding surfaces 2222 or 2223, the possibility that the fingers slip off from the puncture needle when large resistance is generated in the puncture process is avoided, the problem of unsmooth needle insertion is solved, and the pain of a patient is relieved.

With further reference to FIGS. 3, 4 and 5, after theinner needle shaft 11 is inserted into theouter needle cannula 21, theinner needle hub 12 is detachably connected to thesecond mounting portion 223 of theouter needle hub 22 by cooperating snap-fit structures to limit the freedom of rotation of theinner needle assembly 10 about an axis and movement back and forth in an axial direction relative to theouter needle assembly 20. Referring specifically to fig. 4, theinner needle holder 12 of theinner needle assembly 10 includes aninner needle handle 122 and amounting portion 121 formed at an end of theinner needle handle 122 adjacent to theinner needle shaft 11, and alatch arm 123 extends from an end of theinner needle handle 122 adjacent to theinner needle shaft 11. The inner surface of theengaging arm 123 is formed with agroove 1231, and the end of theengaging arm 123 forms a guidinginclined surface 1232. As further shown in fig. 3, the outer surface of thesecond mounting portion 223 of theouter needle handle 22 is formed with aboss structure 2232 which is matched with thegroove structure 1231 on the inner surface of thelatch arm 123, and a first position-limitingprotrusion 2231 and a second position-limitingprotrusion 2233 are provided on both sides of theboss structure 2232 corresponding to both sides of thelatch arm 123. The first limitingprotrusion 2231 and the second limitingprotrusion 2233 are respectively formed with a first limitingsurface 2232 and a second limitingsurface 2234 which abut against the twoside surfaces 1233 and 1234 of thelatching arm 123. When theinner needle assembly 10 is inserted into theouter needle assembly 20, theinner needle rod 11 is first inserted into theouter needle hub 22 and then theouter needle tube 21 from themounting hole 225 formed at the end of theouter needle hub 22 away from the outer needle tube, and themounting portion 121 of theinner needle hub 12 is then inserted into themounting hole 225 of theouter needle hub 22, and simultaneously theengaging arm 123 of theinner needle hub 12 is inserted into the space between the first limitingprotrusion 2231 and the secondlimiting protrusion 2233 on the outer surface of thesecond mounting portion 223 of theouter needle hub 22, so as to limit theneedle point 111 of theinner needle rod 11 and theneedle point 211 of theouter needle tube 21 from aligning. When the guidinginclined surface 1232 of theengaging arm 123 encounters theboss structure 2235, theengaging arm 123 is guided to elastically deform and lift up to pass over theboss structure 2235 until theboss structure 2235 is embedded in the groove structure 1231 (see fig. 5) on the inner surface of theengaging arm 123, theboss structure 2235 and thegroove structure 1231 are engaged with each other to limit the freedom of theinner needle assembly 10 moving back and forth in the axial direction relative to theouter needle assembly 20, and simultaneously the first limitingsurface 2232 of the first limitingprotrusion 2231 and the secondlimiting surface 2234 of the secondlimiting protrusion 2233 are respectively abutted against the twoside surfaces 1233 and 1234 of theengaging arm 123 to limit the freedom of theinner needle assembly 10 rotating around the axis relative to theouter needle assembly 20, so as to reduce the risk of theinner needle shaft 11 and theouter needle tube 21 being disengaged during the puncturing process, and improve the safety and effectiveness of the puncturing.

Referring further to FIG. 6, in accordance with another embodiment of the present application, if the puncturing force is too high for some puncturing applications, the engagement of thegroove structure 1231 with theboss structure 2235 still cannot ensure that theinner needle shaft 11 is not disengaged from theouter needle cannula 21, the retainingbuckle 50 can be added to buckle thesecond mounting portion 223 of theouter needle hub 20 and theinner needle handle 122 to limit the axial movement of the two. As shown in fig. 6, thestop buckle 50 mainly includes a connectingportion 51, afirst stop portion 52 and asecond stop portion 53, thefirst stop portion 52 and thesecond stop portion 53 are disposed opposite to each other, and the connectingportion 51 is connected between thefirst stop portion 52 and thesecond stop portion 53. The first position-limitingportion 52 is provided with a position-limitinghole 521 for matching with a position-limitingboss 1221 formed on an end face of the inner needle hand-holding portion 122 far away from the inner needle rod. Thesecond stopper portion 53 is provided with two elastic surroundingpieces 531 and 532 surrounding thesecond mounting portion 223 of theouter hub 22 from both sides, with anotch 533 formed between the two elastic surroundingpieces 531 and 532. Thelimit buckle 50 is firstly assembled with thelimit boss 1221 of the inner needle handheldportion 122 through thelimit hole 521 on thefirst limit portion 52, then thesecond limit portion 53 is sleeved on thesecond installation portion 223 of theouter needle base 22 through elastic deformation of the two elastic surroundingpieces 531 and 532, so that the two elastic surroundingpieces 531 and 532 surround thesecond installation portion 223, theend surface 534 of thesecond limit portion 53, far away from the inner needle rod, is abutted against thelimit surface 2237 provided by thethird limit protrusion 2236 correspondingly arranged on thesecond installation portion 223, and meanwhile, theend surface 522, near the inner needle rod, of thefirst limit portion 52 is abutted against thelimit surface 1222 on the inner needlehandheld portion 122. In this manner, thestopper 50 limits the axial movement of theinner needle assembly 10 relative to theouter needle assembly 20, thereby ensuring that theinner needle shaft 11 does not disengage from theouter needle cannula 21 during the puncturing process.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A puncture needle comprises an outer needle component and an inner needle component which is arranged in the outer needle component in a penetrating way, the outer needle assembly comprises an outer needle seat and an outer needle tube arranged at one end of the outer needle seat, the outer needle seat further comprises an outer needle holding part and a first installation part and a second installation part, the first installation part and the second installation part are respectively formed at one end, close to the outer needle tube, of the outer needle holding part, and the second installation part is far away from one end of the outer needle tube, the inner needle assembly comprises an inner needle base and an inner needle rod arranged at one end of the inner needle base, the inner needle rod is inserted into the outer needle base from one end of the outer needle base, which is far away from the outer needle tube, and then is inserted into the outer needle tube, the inner needle base is detachably connected with the second mounting part of the outer needle base, it is characterized in that the outer surface of the outer needle holding part forms at least one group of holding surfaces which are opposite in the radial direction, and a circle of raised supporting part is formed on one end, close to the outer needle tube, of the handheld surface of the outer needle handheld part.

2. The needle of claim 1 wherein the outer surface of the outer needle hand-piece defines a first set of hand-held surfaces oriented opposite the outer needle cannula tip and a second set of hand-held surfaces oriented perpendicular to the first set of hand-held surfaces.

3. The needle of claim 1 wherein the outer surface of the outer needle hand grip defines a chamfer configuration between adjacent hand grips.

4. A puncture needle according to any of claims 1 to 3, wherein the outer surface of the outer needle hand grip forms a transition arc between each hand grip and the ridge support.

5. The needle of claim 1 wherein the inner hub is snap-fit to the second mounting portion of the outer hub.

6. The needle of claim 5 wherein the inner hub includes an inner hub gripping portion and a mounting portion formed on the inner hub gripping portion adjacent an end of the inner hub shaft, the outer side of the inner hub gripping portion further including a latch arm extending from the end adjacent the inner hub shaft, the latch arm having a mating recess and a raised boss structure formed between the inner surface of the latch arm and the outer surface of the second mounting portion for engaging the inner hub mounting portion when the inner hub mounting portion is inserted into the second mounting portion of the outer hub mounting portion.

7. The puncture needle according to claim 6, wherein the outer surface of the second mounting portion of the outer hub is further provided with first and second limit protrusions corresponding to both sides of the engaging arm, and the first and second limit protrusions are respectively formed with first and second limit surfaces abutting against both side surfaces of the engaging arm.

8. The needle of claim 1 further comprising a stop snap fit to the second mounting portion of the outer hub and the inner needle handle portion to limit axial movement of the two.

9. The puncture needle according to claim 8, wherein the stopper includes a first stopper portion and a second stopper portion disposed opposite to each other and a connecting portion connected between the first stopper portion and the second stopper portion, the first stopper portion has a stopper hole for engaging with a stopper boss formed on an end surface of the inner needle holder remote from the inner needle shaft, the second stopper portion has two elastic surrounding members surrounding the second mounting portion of the outer needle holder from both sides, and the stopper abuts against a third stopper protrusion provided on the second mounting portion when the stopper is fastened to the stopper boss of the inner needle holder through the stopper hole of the first stopper portion and the two elastic surrounding members of the second stopper portion surround the second mounting portion of the outer needle holder.

10. The puncture needle according to claim 1, further comprising a cursor sleeved on the outer needle tube and a protective sleeve sleeved on the first mounting part of the outer needle holder to accommodate the outer needle tube, the cursor and the inner needle shaft therein.

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