CN211096645U

CN211096645U - Novel arteriovenous puncture indwelling needle

Info

Publication number: CN211096645U
Application number: CN201921236088.1U
Authority: CN
Inventors: 纪洪波
Original assignee: Tianjin Baodi Hospital
Current assignee: Tianjin Baodi Hospital
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-07-28
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a novel arteriovenous puncture indwelling needle, which comprises a needle core, a needle sleeve and a core puller, wherein the needle core comprises a first tube body and a first needle body fixed at the head end of the first tube body; the needle sleeve comprises a second tube body and a second needle body fixed at the head end of the second tube body, and a holding part is arranged on the side wall of the second tube body; the core puller comprises a buckle, a chassis and a connecting rod positioned between the buckle and the chassis, and two hooks are formed on the upper surface of the chassis; the side wall of the first pipe body is provided with a crank-type trigger and a fixing piece, and the fixing piece is connected with the hook through an elastic rope; the side wall of the second pipe body is also provided with a limit column protruding upwards, the pipe wall of the second pipe body is circumferentially sunken to form a groove, and the buckle is clamped in the groove; the needle core is inserted from the tail end of the needle sleeve, and the crank type trigger hooks the limiting column to prevent the needle core from being separated from the needle sleeve. The utility model discloses effectively avoid deviating from blood vessel's problem because of medical staff's both hands operation discordance or the fixed bad needle cover pointed end that leads to of patient's limbs, have good application prospect.

Description

Novel arteriovenous puncture indwelling needle

Technical Field

The utility model relates to a medical treatment consumptive material field specifically is a novel arteriovenous puncture indwelling needle.

Background

The venipuncture catheterization is a common treatment in medical work, the establishment of an effective venous access is the safety guarantee of medical behaviors of all patients, the clinical consumption of a venous indwelling needle is high, and a little defect exists in clinical application. The existing vein puncture needle is generally operated by a right hand, a patient puncture part limb is held by a left hand, blood return of a needle core shows that a blood vessel is punctured, the operation needs two hands, the puncture needle is held by the right hand, the needle core is pulled out by the left hand, meanwhile, the needle core is fed into a needle sleeve by the right hand, the limb and local tissues can not be well fixed by the left hand, meanwhile, the force applied by the two hands is slightly uncoordinated, the tip of the needle sleeve is very easy to be taken out of the blood vessel, the vein puncture catheterization failure is caused, even multiple times of puncture is caused, and the mental and economic losses are.

Therefore, the existing indwelling needle and the operation process need to be optimized and improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel arteriovenous puncture indwelling needle for solving the problems.

The utility model is realized according to the following technical contents.

A novel arteriovenous puncture indwelling needle comprises a needle core, a needle sleeve and a core puller, wherein the needle core comprises a first tube body and a first needle body fixed at the head end of the first tube body; the needle sleeve comprises a second tube body and a second needle body fixed at the head end of the second tube body, and a holding part is arranged on the side wall of the second tube body; the core puller comprises a buckle, a chassis and a connecting rod positioned between the buckle and the chassis, and two hooks are formed on the upper surface of the chassis; the side wall of the first pipe body is provided with a crank-type trigger and a fixing piece, and the fixing piece is connected with the hook through an elastic rope; the side wall of the second pipe body is also provided with a limit column protruding upwards, the pipe wall of the second pipe body is circumferentially sunken to form a groove, and the buckle is clamped in the groove; the needle core is inserted from the tail end of the needle sleeve, and the crank type trigger hooks the limiting column to prevent the needle core from being separated from the needle sleeve.

Furthermore, the crank type trigger comprises three sections, wherein one end of the tail section is fixed on the side wall of the first pipe body, and the other end of the tail section is connected with the middle section; the middle section is parallel to the first needle body; the first section is vertical to the middle section; the length of the first section is not less than the width of the limiting column; the length of the end section is less than the height of the limiting column.

Furthermore, the stationary blade is located the lower part of first body, and is no less than two, and the stationary blade symmetry sets up on the pipe wall of first body.

Furthermore, the groove is located between the second needle body and the limiting column and is close to the edge of the head end of the second tube body.

Further, the shape of buckle is two-thirds ring, and the ring internal diameter of buckle = the depth of the external diameter-2 × recess of second body.

The utility model has the advantages and beneficial effects that:

the utility model discloses can liberate medical staff's left hand, in the puncture operation process, the left hand is only fixed puncture limbs and puncture position, and the whole in-process need not to remove the left hand to good fixed to patient's limbs has been kept. The puncture needle can be operated by only one hand of the right hand, after the good blood return of the needle core is seen, the position of the right hand does not need to be changed, the index finger of the right hand triggers the crank type trigger, and the separation of the needle core and the needle sleeve can be realized by means of the elastic potential energy of the elastic rope, so that the needle core can be automatically pulled out. Then the right hand continues to feed into the needle sleeve, and after the needle sleeve is in place, other auxiliary devices are removed and the needle sleeve is connected with an intravenous infusion pipeline. The utility model discloses can effectively avoid deviating from vascular problem because of medical staff's both hands operation discordance or the fixed bad needle cover pointed end that leads to of patient's limbs, have good application prospect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of the stylet of the present invention;

FIG. 3 is a schematic structural view of the needle core of the present invention;

FIG. 4 is a diagram of a needle hub according to the present invention;

FIG. 5 is a schematic structural view of the core puller of the present invention;

fig. 6 is a schematic structural view of a hook on the core puller of the present invention.

101, a first needle body; 102. a crank type trigger; 103. a first pipe body; 104. a fixing sheet; 201. a second needle body; 202. a second tube body; 203. a grip portion; 204. a limiting column; 205. a groove; 301. buckling; 302. a connecting rod; 303. a chassis; 304. hooking; 4. an elastic rope.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 6, a novel arteriovenous puncture indwelling needle comprises a needle core, a needle sleeve and a core puller, wherein the needle core comprises a first tube 103 and a first needle body 101 fixed at the head end of the first tube; the needle sleeve comprises a second tube 202 and a second needle 201 fixed at the head end of the second tube 202, and a holding part 203 is arranged on the side wall of the second tube 202; the core puller comprises a buckle 301, a chassis 303 and a connecting rod 302 positioned between the buckle and the chassis 303, and two hooks 304 are formed on the upper surface of the chassis 303; a crank type trigger 102 and a fixing piece 104 are arranged on the side wall of the first pipe body 103, and the fixing piece 104 is connected with the hook 304 through an elastic rope 4; the side wall of the second pipe body 202 is further provided with a limiting column 204 protruding upwards, the pipe wall of the second pipe body 202 is circumferentially recessed to form a groove 205, and the buckle 301 is clamped in the groove 205; the stylet is inserted from the tail end of the needle sheath, and the crank-type trigger 102 hooks the limit column 204 to prevent the stylet from being separated from the needle sheath.

The fixing pieces 104 are located at the lower part of the first pipe body 103 and are not less than two, and the fixing pieces 104 are symmetrically arranged on the pipe wall of the first pipe body 103.

The groove 205 is located between the second pin 201 and the limiting column 204 and is close to the edge of the head end of the second tube 202.

The number relationship between the shape of the buckle 301, the inner diameter d1 of the ring, the outer diameter d2 of the second tube 202, and the depth d3 of the groove 205 is d1= d2-2 × d 3.

The crank type trigger 102 comprises three sections, wherein one end of the tail section is fixed on the side wall of the first pipe body 103, and the other end of the tail section is connected with the middle section; the middle section is parallel to the first needle body 101; the first section is vertical to the middle section; the length of the first section is not less than the width of the limiting column 204; the length of the end section is less than the height of the limiting column 204.

FIGS. 2 to 3 show an improved needle core, in which two fixing pieces 104 for fastening the elastic cord 4 are provided at both sides of the needle tail, and a crank type trigger 102 is provided at the rear part of the needle tail in the forward direction; the elastic cord 4 may be a conventional rubber band with both ends directly hooked between the hook 304 and the fixing piece 104.

Fig. 4 shows an improved needle guard, the holding part 203 is a puncture needle holding part, the limit column 204 can be a trigger clamping point in 12 o 'clock (the extending direction of the limit column 204 is parallel to the second needle body 201) or 1 o' clock (the extending direction of the limit column 204 forms an angle of 30 degrees with the second needle body 201), the crank type trigger 102 is clamped, an annular groove 205 is arranged at a position 1mm away from the upper edge of the holding part 203, and a buckle 301 of the core drawer is clamped into the groove 205 to fix the core drawer.

Fig. 5-6 show a core puller, the front end of the core puller is a two-thirds annular buckle 301, the rear part of the core puller is an L-shaped support, the length of the L-shaped support is adjusted according to the type of a needle, the core is required to be retracted into a needle sleeve for 3mm when the core is automatically pulled out, meanwhile, the chassis 303 limits excessive pulling out of the core, the core is enabled to play a certain supporting role in the process of feeding the core into the needle sleeve, the hook 304 is positioned on the chassis 303, the two elastic ropes 4 generate elastic potential energy, and the core is pulled out when the crank type trigger 102 is triggered.

Fig. 1 is a sample view of an assembled finished product.

In the clinical practical operation process, different types of vein puncture indwelling needles are selected according to different blood vessels, the left hand holds the local part of a vein puncture limb, the right hand user uses the product (the left hand user uses a mirror image product), the upper edge and the lower edge of the holding part 203 are held by the thumb and the middle finger, the index finger is placed on the holding part, blood flows back into the needle core during puncture to determine that the needle sleeve is in the blood vessel, the holding part 203 is held by the thumb and the middle finger to be fixed, the index finger touches the crank type trigger 102 to enable the crank type trigger 102 to be separated from the fixing of the limiting column 204, the needle core is pulled to the position of the chassis 303 by means of the elastic potential energy of the elastic rope 4, the thumb and the middle finger continue to push the puncture needle to be in place.

Claims

1. A novel arteriovenous puncture indwelling needle is characterized by comprising a needle core, a needle sleeve and a core puller, wherein the needle core comprises a first tube body (103) and a first needle body (101) fixed at the head end of the first tube body; the needle sleeve comprises a second tube body (202) and a second needle body (201) fixed at the head end of the second tube body, and a holding part (203) is arranged on the side wall of the second tube body (202); the core puller comprises a buckle (301), a chassis (303) and a connecting rod (302) positioned between the buckle and the chassis, wherein two hooks (304) are formed on the upper surface of the chassis (303); a crank-type trigger (102) and a fixing piece (104) are arranged on the side wall of the first pipe body (103), and the fixing piece (104) is connected with the hook (304) through an elastic rope (4); the side wall of the second pipe body (202) is further provided with a limiting column (204) protruding upwards, the pipe wall of the second pipe body (202) is circumferentially sunken to form a groove (205), and the buckle (301) is clamped in the groove (205); the needle core is inserted from the tail end of the needle sleeve, and the crank-type trigger (102) hooks the limiting column (204) to prevent the needle core from being separated from the needle sleeve.

2. The novel arteriovenous puncture indwelling needle of claim 1, wherein the crank-type trigger (102) comprises three segments, wherein one end of the end segment is fixed to the side wall of the first tube body (103), and the other end is connected with the middle segment; the middle section is parallel to the first needle body (101); the first section is vertical to the middle section; the length of the first section is not less than the width of the limiting column (204); the length of the end section is less than the height of the limiting column (204).

3. The novel arteriovenous puncture indwelling needle according to claim 1 or 2, wherein the fixing pieces (104) are located at the lower part of the first tube body (103) and are not less than two pieces, and the fixing pieces (104) are symmetrically arranged on the tube wall of the first tube body (103).

4. The novel arteriovenous puncture indwelling needle according to claim 1 or 2, wherein the groove (205) is positioned between the second needle body (201) and the stopper column (204) and near the edge of the head end of the second tube body (202).

5. The novel arteriovenous puncture indwelling needle of claim 1 or 2, wherein the shape of the buckle (301) is a two-thirds circular ring, and the inner diameter of the circular ring of the buckle (301) is = the outer diameter of the second tube (202) -2 × depth of the groove (205).