A kind of peripheral venous catheter and its application methodTechnical field
The invention belongs to the field of medical instrument technology, a kind of peripheral venous catheter and its application method are related in particular to.
Background technique
Infusion apparatus is the irreplaceable medical instrument of current clinical transfusion, and in recent years, the technology development of infusion apparatus achievesImportant breakthrough.Important composition part of the retention transfusion as infusion treatment shows increasingly universal development trend.
Currently, clinically commonly used Sai Dingge technology, improvement Sai Dingge technology or tearable puncture needle technology, complete phaseThe operation for the peripheral venous catheter indwelling human vas answered.The peripheral venous catheter of clinical use, usually by syringe, punctureNeedle, the band components such as sheath expander or expander, seal wire and peripheral venous catheter form, and each component is usually in mutually indepedent state.
When carrying out peripheral venous catheter indwelling operation, following steps are generally comprised：1, puncture needle and syringe connect；2, it wearsPricker is pierced into human vas；3, syringe pumpback is shown in that blood back, confirmation puncture needle have been pierced into blood vessel；4, syringe is removed；5, seal wireEnter human vas along puncture needle；6, puncture needle is removed；7, expander is imported along seal wire, carries out expansion skin；8, expansion is removedDevice；9, peripheral venous catheter imports human vas along seal wire；10, seal wire is removed；11, peripheral venous catheter is locked on the skin,Whole operation process need to take component to complete one by one, inconvenient for operation；Blood backflow is seen by syringe pumpback, to confirm puncture needleIn place whether, program is cumbersome；In particular, puncture needle used in tearable puncture needle technology is excessively thick, it is easy to cause larger face to patientLong-pending injury of blood vessel causes the myalgia of patient.
Summary of the invention
For various deficiencies of the prior art, to solve the above-mentioned problems, it is proposed that a kind of simplified operating process is improved and setPipe success rate effectively improves working efficiency, prevents injured operator, reduction puncture wound face, the simple peripheral vein of structure from leadingPipe and its application method.
To achieve the above object, the present invention provides the following technical solutions：
A kind of peripheral venous catheter, including the service portion and tight lock part being connected, the service portion successively wraps from the inside to surfacePuncture needle, expander and the conduit of socket setting are included, the tight lock part is arranged in expander end comprising one He of locking deviceLocking device two, the locking device one include the locking member one and locking member two to match, and the locking device two is set in pairsIt sets, one end is provided with shackle member one and limited block one, and the other end is provided with shackle member two and limited block two.
Further, the end of the puncture needle is provided with Paracentesis needle holder, and the end of the expander is provided with expander seat,The end of the conduit is provided with catheter block.
Further, the locking member one is set as internal thread structure, connect with expander seat, and the locking member two is arrangedFor external thread structure, it is connect with catheter block.
Further, the shackle member one is set as cyclic structure, and the shackle member two is set as groove structure, the lockingDevice two is connect by shackle member one with expander seat, and the other end runs through the Paracentesis needle holder.
Further, the ipsilateral of locking device two is arranged in the limited block one and limited block two, and the limited block one is arrangedHeight for wedge structure, the wedge structure is sequentially increased from shackle member two to the direction of shackle member one.
Further, the Paracentesis needle holder is set as transparent configuration, is internally provided with and matches with limited block one, limited block twoFluting.
It further, further include the seal wire for being set as absolute construction, the seal wire end is provided with shackle member three, the clampingPart three is set as card convex structure, is provided on the Paracentesis needle holder and the matched shackle member four of shackle member three, the shackle member fourIt is set as card hole structure.
Further, the length of the puncture needle, expander and conduit successively reduces 1-2cm.
Further, the tip of the puncture needle is set as frosted structure, and the puncture needle is provided with expander jointBlood back slot.
In addition, including the following steps the present invention also provides a kind of application method of peripheral venous catheter：
(1) Paracentesis needle holder is pushed, the fluting is promoted to slide along limited block one, until connect with expander seat,The puncture is needled into patient vessel by operator；
(2) after operator sees blood back by the blood back slot, in place, the seal wire is sequentially passed through for confirmation puncture needleParacentesis needle holder, expander seat, catheter block, conduit, expander and puncture needle, slowly import patient's body；
(3) after the shackle member three is fastened with the clamping of shackle member four, the seal wire is imported successfully, at this point, wearing described in pushingPricker seat promotes the conduit to reach the catheterization depth of setting；
(4) Paracentesis needle holder is withdrawn, it is moved at shackle member two along locking device two, is positioned；
(5) locking member one, locking member two are turned, the catheter block is separated with expander seat, promotes the conduitIt is retained in patient's body, removes other assemblies, operating process is completed.
The beneficial effects of the invention are as follows：
1, service portion and tight lock part are combined as a whole by the present invention, are not required to take component to complete one by one in operating process, haveSimplify operating process, improve the characteristics of setting pipe success rate.
2, the present invention is by the mating reaction of locking device one and locking device two, can disposably complete puncture needle,The taking-up of expander and seal wire operates, and effectively improves working efficiency.
3, the present invention successively connects together puncture needle, expander and conduit from the inside to surface, withdraws process in puncture needleIn, promote the tip of puncture needle to be located in expander, effectively prevent operator to touch tip and injured.
4, the present invention, which successively coats puncture needle, expander and conduit, connects together, and socket taper meets medical taperStandard, facilitates expander, conduit enters in patient vessel along with puncture needle is synchronous, has puncture wound face of reducing, mitigatesThe characteristics of patient pain.
5, the present invention is provided with blood back slot in puncture needle and expander joint, directly observes puncture by blood back slot blood backNeedle situation in place does not need to observe blood back by syringe, has the characteristics that structure is simple, saving medical instrument.
6, each component selects the medical common material of industry to be made in the present invention, wherein puncture needle and seal wire are directly selectedCommon Component in industry has the characteristics that material is easy to get, is at low cost.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the schematic diagram of the section structure of the invention；
Fig. 3 is that Paracentesis needle holder of the invention moves to structural schematic diagram at shackle member two；
Fig. 4 is tight lock part structural schematic diagram of the invention；
Fig. 5 is two structural schematic diagram of locking device of the invention；
Fig. 6 is locking device two side faces structural schematic diagram of the invention；
Fig. 7 is blood back slot structure schematic diagram of the invention.
In attached drawing：
Puncture needle 1, expander 2, conduit 3, catheter block 4, expander seat 5, Paracentesis needle holder 6, locking device 1, locking memberOne 8, locking member 29, locking device 2 10, seal wire 11, shackle member 3 12, shackle member 1, limited block 1, limited block two15, shackle member 2 16, shackle member 4 17, blood back slot 18, fluting 19.
Specific embodiment
It is right below with reference to attached drawing of the invention in order to make those skilled in the art more fully understand technical solution of the present inventionTechnical solution of the present invention carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art existOther similar embodiments obtained under the premise of creative work are not made, shall fall within the protection scope of the present application.
Embodiment one：
As shown in Figure 1, Figure 7 shows, a kind of peripheral venous catheter, including the service portion and tight lock part being connected, the service portionIt from the inside to surface successively include puncture needle 1, expander 2 and the conduit 3 of socket setting, the socket taper of the three is disposed as 1：16.67, the taper meets medical taper standard, and the length of the puncture needle 1, expander 2 and conduit 3 successively reduces 1-2cm facilitates expander 2, conduit 3 enters in patient vessel along with puncture needle 1 is synchronous, reduction puncture wound face, mitigation troublePerson's pain, the length of the three carry out as above matching setting, both can guarantee that the puncture needle 1 was exposed at 2 outside of expanderLength is able to carry out effective puncture, and when can guarantee that the puncture needle 1 is withdrawn, tip can be completely disposed in expander 2Portion.
The end of the puncture needle 1 is provided with Paracentesis needle holder 6, and 6 surface of Paracentesis needle holder is provided with handpiece, convenient for movingThe Paracentesis needle holder 6 is moved, the end of the expander 2 is provided with expander seat 5, and the end of the conduit 3 is provided with catheter block4,4 surface of catheter block is provided with fin, helps to increase the frictional force between operator's hand and catheter block 4, easy to disassemble,Preferably, the material of the expander 2 is set as polypropylene, ABS, polyurethane, nylon, any one in polyethylene, instituteThe material for stating conduit 3 is set as polyurethane, nylon, any one in polytetrafluoroethylene (PTFE) thermoplastic, the puncture needle 1Material is set as medical stainless steel, and the material is the common material of medical industry, is easy to draw materials, at low cost, the punctureThe position that needle stand 6, catheter block 4 connect with expander seat 5 is disposed as concave inward structure, facilitates the connection of three.
The tip of the puncture needle 1 is set as frosted structure, is easily formed the reflecting surface to ultrasonic wave, when the puncture needle1 with different angle puncture patient vessel when, can obtain preferable ultrasonic reflections wave, can effectively be worn with ultrasonic guidanceThe cooperation of thorn technology, the length of the frosted structure are set as 1-1.5cm, and the puncture needle 1 is provided with back with 2 joint of expanderBlood slot 18, the puncture needle 1 are punctured into after blood vessel, and blood enters puncture needle 1, and operator observes blood back through the blood back slot 18Afterwards, confirm that the puncture needle 1 in place, does not need to observe blood back by syringe, save medical instrument, structure is simple.
Embodiment two：
As shown in Figs 1-4, the tight lock part is arranged in 2 end of expander comprising locking device 1 and locking device two10, preferably, the material of the tight lock part is set as copolyesters, the locking device 1 includes the locking member 1 to matchWith locking member 29, the locking member 1 is set as internal thread structure, connect with expander seat 5, and the locking member 29 is arrangedIt for external thread structure, is connect with catheter block 4, under the mating reaction of the locking member 1 and locking member 29, by the expansionProp seat 5 links together with catheter block 4, plays fixed function to the expander 2 and conduit 3.
As shown in figures 1 to 6, the locking device 2 10 is arranged in pairs, and one end is provided with shackle member 1 and limited block one14, the other end is provided with shackle member 2 16 and limited block 2 15, and the locking device 2 10 passes through shackle member 1 and expansionDevice seat 5 connects, preferably, the shackle member 1 is set as cyclic structure, facilitates expander seat 5 and locking device two10 are securely attached to together, and the shackle member 2 16 is set as groove structure, and it is fixed to help to carry out being clamped to Paracentesis needle holder 6Position.
The other end of the locking device 2 10 runs through the Paracentesis needle holder 6, promotes the Paracentesis needle holder 6 can be along lockTight device 2 10 slides, and helps to complete the puncture of puncture needle 1 and withdraws operation, the limited block 1 and limited block 2 15 are setIt sets in the ipsilateral of locking device 2 10, the Paracentesis needle holder 6 is internally provided with and limited block 1, limited block 2 15 is matched opensSlot 19 facilitates the Paracentesis needle holder 6 and slides, the limited block 1, limited block 2 15 Paracentesis needle holder 6 sliding processIn, play guiding and positioning action.
As shown in Figure 1, Figure 2, Figure 4 shows, the limited block 1 is set as wedge structure, and the height of the wedge structure is blocked certainlyFitting 2 16 is sequentially increased to the direction of shackle member 1, plays buffering, guiding role, institute to the sliding of the Paracentesis needle holder 6Paracentesis needle holder 6 is stated along limited block 1 to when moving close to the direction of expander seat 5, drives the puncture needle 1 mobile, promotesThe length that the puncture needle 1 exposes expander 2 is gradually increased, when the Paracentesis needle holder 6 be moved to 5 joint of expander seat,The i.e. described Paracentesis needle holder 6 reaches upper limit position, at this point, the length maximum that the puncture needle 1 is exposed, can carry out puncture procedure.
Embodiment three：
As shown in Figure 1-3, the seal wire 11 is set as absolute construction, end is provided with shackle member 3 12, the seal wire11 pairs of expanders 2, conduit 3 have guide function, and the material of the seal wire 11 is set as medical stainless steel, the Paracentesis needle holder 6On be provided with and be set as card convex structure, the shackle member with the matched shackle member 4 17 of shackle member 3 12, the shackle member 3 124 17 are set as card hole structure.
The puncture needle 1 is pierced into patient vessel, after operator sees blood back, by the seal wire 11 successively by puncturingNeedle stand 6, expander seat 5, catheter block 4, conduit 3, expander 2 and puncture needle 1 import in patient vessel, the shackle member 3 12 withShackle member 4 17 is fastened, and plays fixed function to the seal wire 11, shows that the seal wire 11 imports successfully, the puncture needleSeat 6 is set as transparent configuration, convenient for checking the importing state of seal wire 11, preferably, the material of the Paracentesis needle holder 6 is set asAny one in polycarbonate, polypropylene.
After the conduit 3 imports patient vessel, the Paracentesis needle holder 6 need to only be moved along the direction far from expander seat 5It is dynamic, the puncture needle 1 and seal wire 11 are withdrawn, when the Paracentesis needle holder 6 is moved to shackle member two along limited block 2 15When at 16,2 16 pairs of Paracentesis needle holders 6 of the shackle member carry out clamping positioning, i.e., the described Paracentesis needle holder 6 reaches lower position, thisWhen, the tip of the puncture needle 1 is completely disposed in expander 2, avoids being touched, and effectively prevent operator injured, is turned describedLocking device 1, the locking member 1, locking member 29 be threadedly engaged effect under, promote the expander seat 5 and conduitSeat 4 separates, and the conduit 3 is retained in patient's body, disposable to take out puncture needle 1, expander 2 and seal wire 11, effectively improvesWorking efficiency.
In 11 importing process of seal wire, length exceed puncture needle 1 tip portion, the blood back slot 18 bySeal wire 11 shelters from, and during the puncture needle 1 and seal wire 11 are withdrawn, blood is overflowed without going past blood back slot 18, pollution doctorTreat instrument.
Example IV：
As shown in figs. 1-7, the application method of a kind of peripheral venous catheter, includes the following steps：
(1) Paracentesis needle holder 6 is pushed, the fluting 19 is promoted to slide along limited block 1, until with expander seat 5Connect, the Paracentesis needle holder 6 is positioned, is i.e. the Paracentesis needle holder 6 reaches upper limit position, and operator is by the puncture needle 1It is pierced into patient vessel；
(2) after operator sees blood back by the blood back slot 18, confirm that the puncture needle 1 comes into patient vesselIn, the seal wire 11 is sequentially passed through into Paracentesis needle holder 6, expander seat 5, catheter block 4, conduit 3, expander 2 and puncture needle 1, is delayedIt is slow to import patient's body；
(3) after the shackle member 3 12 is fastened with the clamping of shackle member 4 17, the seal wire 11 is positioned, is shown describedSeal wire 11 imports successfully, at this point, pushing the Paracentesis needle holder 6, promotes the conduit 3 to move forward along seal wire 11, reaches settingCatheterization depth；
(4) Paracentesis needle holder 6 is withdrawn, it is moved at shackle member 2 16 along locking device 2 10, is positioned,The i.e. described Paracentesis needle holder 6 reaches lower position, during the Paracentesis needle holder 6 is withdrawn, the puncture needle 1 and seal wire 11 is driven to returnIt removes, the tip of the puncture needle 1 is promoted to be completely disposed in expander 2；
(5) locking member 1, locking member 29 are turned, the catheter block 4 is separated with expander seat 5, is promoted describedConduit 3 is retained in patient's body, and other assemblies are taken out, and operating process is completed.
It in the importing process of the seal wire 11, if being hampered power, imports after answering rotation direction, exists if there is resistance again,It should stop immediately, exit puncture needle 1 and seal wire 11, reselect site of puncture, the seal wire 11 is avoided to pass through blood vessel side wall,The intracorporal soft tissue of injured patient.In addition, operator should avoid puncturing same position repeatedly, to reduce patient tissueWith the damage of blood vessel, in addition, the catheterization depth of the conduit 3, it should according to the actual conditions of patient and pipe portion position is set, be drunkFeelings setting.
During whole operation, operator is not required to take component to complete one by one, simplifies operating process, effectively increases and set pipeSuccess rate, the peripheral venous catheter is suitable for human body and animal body indwelling, and is suitable for any one place's position, usesRange is wide.
The above has been described in detail, described above, is only a preferred embodiment of the present invention, when cannotIt limit the scope of implementation of the present invention, i.e., it is all according to the made equivalent changes and modifications of the application range, it should still belong to covering scope of the present inventionIt is interior.