CN110123282B - Arterial puncture needle - Google Patents
Arterial puncture needle Download PDFInfo
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- CN110123282B CN110123282B CN201910515127.XA CN201910515127A CN110123282B CN 110123282 B CN110123282 B CN 110123282B CN 201910515127 A CN201910515127 A CN 201910515127A CN 110123282 B CN110123282 B CN 110123282B
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- catheter
- puncture needle
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- pressing plate
- needle
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- 238000001125 extrusion Methods 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000002441 reversible effect Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 16
- 230000001360 synchronised effect Effects 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 description 21
- 229910001220 stainless steel Inorganic materials 0.000 description 17
- 239000010935 stainless steel Substances 0.000 description 17
- 230000017531 blood circulation Effects 0.000 description 16
- 239000008280 blood Substances 0.000 description 10
- 210000004369 blood Anatomy 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 230000004872 arterial blood pressure Effects 0.000 description 6
- 210000001367 artery Anatomy 0.000 description 5
- 230000036772 blood pressure Effects 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6848—Needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Cardiology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Physiology (AREA)
- Gastroenterology & Hepatology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to an arterial puncture needle, which comprises an indwelling needle and a puncture needle inserted into the indwelling needle, wherein the indwelling needle comprises a catheter seat, an indwelling needle catheter arranged at the front end of the catheter seat and a pressure measuring joint arranged at the rear end of the catheter seat, the catheter seat is a square shell with an opening at the bottom, a cylindrical extrusion block is arranged in the catheter seat, the extrusion block is coaxially arranged with the indwelling needle catheter and the pressure measuring joint, the extrusion block is made of a high-elasticity material with reversible deformation, a through hole is formed in the middle of the extrusion block along the axis, a rubber tube is arranged in the through hole, two ends of the rubber tube are respectively communicated with the indwelling needle catheter and the pressure measuring joint, and an extrusion device for compacting the extrusion block is arranged in the catheter seat; the puncture needle comprises a puncture needle seat, side wings arranged on two sides of the puncture needle seat and a puncture needle tube arranged at the front end of the puncture needle seat.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an arterial puncture needle.
Background
Clinically, for critical operation patients or intensive care patients, continuous blood pressure monitoring is required, and usually invasive blood pressure detection is adopted, namely, an arterial indwelling needle is inserted into an artery and then connected with an arterial pressure measuring device, so that the change of arterial blood pressure is measured immediately. The existing commonly used arterial indwelling needle is an arterial indwelling needle (20G x 45 mm) of a BD company, the arterial indwelling needle consists of a stainless steel needle, an indwelling needle and a needle tube sleeve, the stainless steel needle consists of a needle body, a needle seat and a handle, the needle body is a common stainless steel needle tube, the front end of the needle body is a needle point, the needle is easy to puncture, the needle seat is positioned at the tail end of the stainless steel needle tube, and the handle is arranged on the needle seat; the indwelling needle consists of an indwelling needle catheter, a catheter seat and a blood flow blocking valve, the indwelling needle catheter is a transparent plastic tube, is softer and suitable for being indwelled in a blood vessel for a long time, is sleeved outside a stainless steel needle tube and is about 1mm shorter than the stainless steel needle tube, the blood flow blocking valve is arranged on the catheter seat, and the inner cavity channel of the catheter seat is opened or closed by sliding the blood flow blocking valve back and forth; the catheter sleeve is sleeved outside the indwelling catheter and is slightly longer than the stainless steel catheter, and is used for protecting the indwelling catheter and the stainless steel needle tube. The combination of stainless steel needle, indwelling needle and needle tube sleeve is that stainless steel needle tube is inserted into indwelling needle tube through the inner cavity of catheter seat of indwelling needle, the needle seat is inserted into tail end of catheter seat, handle is held on two sides of needle seat of indwelling needle, needle tube sleeve is covered outside indwelling needle tube.
When the blood pressure measuring device is used, the needle tube sleeve is taken down, the stainless steel needle tube and the indwelling needle catheter are inserted into an arterial blood vessel together according to the conventional method, the blood flow blocking valve is placed at the opening position, if blood return occurs in the channel of the catheter seat, the needle head of the stainless steel needle tube is inserted into the arterial blood vessel, the stainless steel needle is pulled out, the blood flow blocking valve is closed to block the blood flow, the tail end of the catheter seat is connected with the arterial pressure measuring device through the connecting tube, and the change of the blood pressure in the artery can be observed immediately.
However, such arterial indwelling needles have the following drawbacks: 1) Although the blood flow blocking valve can be closed to block blood flow, in actual operation, the blood cannot be completely prevented from overflowing from the tail end of the catheter seat, and after the stainless steel needle is withdrawn, the time difference before the blood flow blocking valve is closed can cause blood ejection, so that pollution is easy to cause, and particularly, the blood of infectious patients is easy to cause; 2) The blood flow blocking valve can realize the opening and closing of the inner cavity channel of the catheter seat by sliding forwards and backwards, so that the indwelling needle is easy to cause instant impact during sliding, the indwelling needle is easy to go deep to cause the pain of a patient during forward pushing, and the indwelling needle catheter is easy to be separated from an arterial vessel during backward pulling; 3) When the stainless steel needle and the indwelling needle catheter are inserted into an arterial vessel, if the blood flow blocking valve is in an open position, the stainless steel needle and the indwelling needle catheter are easy to separate and difficult to insert, and if the blood flow blocking valve is in a closed position, the stainless steel needle can slightly deform under the action of the blood flow blocking valve, so that the use is affected.
Aiming at the problems, the invention provides the arterial puncture needle which has simple structure and convenient use, the blocking of the channel of the catheter seat is realized by arranging the extrusion block and the extrusion device which are made of rubber materials, when the indwelling catheter and the puncture needle tube are inserted into an artery, the extrusion block is tightly pressed by the extrusion device, the indwelling catheter and the puncture needle tube are not easy to separate, when the puncture needle tube is pulled out, the extrusion device is not required to be loosened, the arterial puncture needle is directly pulled out, the rubber tube in the middle of the extrusion block can be collapsed under the action of pressure, the blocking of the channel of the catheter seat is realized, and the occurrence of blood spraying is avoided; the extrusion device adopts a specially designed synchronous extrusion mechanism, and the upper pressing plate and the lower pressing plate synchronously draw close to the middle part of the extrusion block, so that the puncture needle tube is prevented from deforming under the action of pressure when the channel of the catheter seat is blocked; the extrusion device realizes compaction through the screw rod, realizes blood flow blocking, and avoids instant impact on the indwelling needle when the catheter seat channel is opened and closed.
Disclosure of Invention
The invention aims to solve the technical problem of providing the arterial puncture needle which has the advantages of simple structure, small impact, good blood blocking effect, convenient use and safety.
In order to solve the problems, the invention adopts the following technical scheme:
The arterial puncture needle comprises an indwelling needle and a puncture needle inserted into the indwelling needle, wherein the indwelling needle comprises a catheter seat, an indwelling needle catheter arranged at the front end of the catheter seat and a pressure measuring joint arranged at the rear end of the catheter seat, the catheter seat is a square shell with an opening at the bottom, a cylindrical extrusion block is arranged in the catheter seat, the extrusion block is coaxially arranged with the indwelling needle catheter and the pressure measuring joint, the extrusion block is made of a high-elasticity material with reversible deformation, a through hole is formed in the middle of the extrusion block along the axis, a rubber tube is arranged in the through hole, two ends of the rubber tube are respectively communicated with the indwelling needle catheter and the pressure measuring joint, and an extrusion device for compacting the extrusion block is arranged in the catheter seat;
the puncture needle comprises a puncture needle seat, side wings arranged on two sides of the puncture needle seat and a puncture needle tube arranged at the front end of the puncture needle seat.
As a further improvement of the invention, the extrusion device comprises an upper pressing plate arranged above the extrusion block and a lower pressing plate arranged below the extrusion block, wherein a synchronous extrusion mechanism is arranged between the upper pressing plate and the lower pressing plate, and the synchronous extrusion mechanism is provided with two groups and symmetrically arranged at two sides of the upper pressing plate; the upper pressing plate is vertically provided with a screw rod above, the top of the conduit seat is provided with a threaded hole matched with the screw rod, and the bottom of the screw rod is hinged with the top of the conduit seat.
As a further improvement of the invention, guide blocks are arranged on two sides of the upper pressing plate and the lower pressing plate, and guide grooves matched with the guide blocks are vertically formed on two side walls of the guide pipe seat.
As a further improvement of the invention, the synchronous extrusion mechanism comprises two connecting rods which are arranged between the upper pressing plate and the lower pressing plate in a crossing way, wherein the middle parts of the two connecting rods are penetrated with fixed shafts which are fixedly arranged on the side wall of the inside of the catheter seat; the two ends of the connecting rod are hinged with sliding blocks, sliding grooves matched with the sliding blocks are formed in the inner sides of the upper pressing plate and the lower pressing plate, and the sliding blocks are clamped in the sliding grooves.
As a further improvement of the invention, the inner side of the synchronous extrusion mechanism is provided with a side baffle plate, and the side baffle plate is fixedly arranged on the inner side wall of the conduit seat through a mounting column.
As a further improvement of the invention, a bearing is arranged between the connecting rod and the fixed shaft.
As a further improvement of the invention, a cushion block is arranged between the middle parts of the two connecting rods, and the cushion block is sleeved on the fixed shaft.
As a further improvement of the invention, the extrusion block is made of rubber.
As a further improvement of the invention, the top of the screw is provided with a handle.
As a further improvement of the invention, the catheter also comprises a needle tube sleeve, wherein the needle tube sleeve is sleeved outside the indwelling catheter and the puncture needle tube.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
According to the arterial puncture needle, the blocking of the catheter seat channel is realized by arranging the extrusion block and the extrusion device which are made of rubber materials, when the indwelling needle catheter and the puncture needle tube are inserted into an artery, the extrusion block is tightly pressed by the extrusion device, the indwelling needle catheter and the puncture needle tube are not easy to separate, when the puncture needle tube is pulled out, the extrusion device is not required to be loosened, the arterial puncture needle is directly pulled out, the rubber tube in the middle of the extrusion block is shrunken under the action of pressure, the blocking of the catheter seat channel is realized, and the occurrence of blood injection is avoided. The extrusion device adopts a synchronous extrusion mechanism with special design, and the upper pressing plate and the lower pressing plate synchronously draw close to the middle part of the extrusion block, so that the puncture needle tube is prevented from deforming under the action of pressure when the channel of the catheter seat is blocked. The extrusion device realizes compaction through the screw rod, realizes blood flow blocking, and avoids instant impact on the indwelling needle when the catheter seat channel is opened and closed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic cross-sectional view of the structure at A-A in fig. 1.
Fig. 3 is a schematic cross-sectional view of the structure at B-B in fig. 2.
Fig. 4 is a schematic view of the structure of the indwelling needle according to the present invention.
Fig. 5 is a schematic view of the structure of the puncture needle according to the present invention.
Wherein: 1 catheter seat, 1-1 guide slot, 2 remaining needle catheter, 3 pressure measuring joint, 4 upper pressing plate, 5 lower pressing plate, 6 connecting rod, 7 fixed shaft, 8 slide block, 9 side baffle, 10 installing column, 11 screw rod, 12 handle, 13 extrusion block, 13-1 rubber tube, 14 cushion block, 15 chute, 16 guide block, 17 puncture needle seat, 18 puncture needle tube, 19 flank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.
An arterial puncture needle as shown in fig. 1-5 comprises an indwelling needle and a puncture needle inserted therein, wherein the indwelling needle comprises a catheter seat 1, an indwelling needle catheter 2 arranged at the front end of the catheter seat 1 and a pressure measuring joint 3 arranged at the rear end of the catheter seat 1, and the pressure measuring joint 3 is used for being connected with an arterial pressure measuring device. The catheter seat 1 is a square shell with an opening at the bottom, a cylindrical extrusion block 13 is arranged in the catheter seat 1, two ends of the extrusion block 13 are in contact with the inner wall of the catheter seat 1, the extrusion block 13 is made of a high-elasticity material with reversible deformation, and in the embodiment, the extrusion block 13 is made of rubber. The extrusion block 13 is coaxially arranged with the indwelling needle catheter 2 and the pressure measuring joint 3, a through hole is formed in the middle of the extrusion block 13 along the axis, a rubber tube 13-1 is arranged in the through hole, and in the embodiment, the outer wall of the rubber tube 13-1 is adhered to the side wall of the through hole. Two ends of the rubber tube 13-1 are respectively communicated with the indwelling needle catheter 2 and the pressure measuring joint 3, and an extrusion device for compacting the extrusion block 13 is arranged in the catheter seat 1.
The puncture needle comprises a puncture needle seat 17, side wings 19 arranged on two sides of the puncture needle seat 17 and a puncture needle tube 18 arranged at the front end of the puncture needle seat 17. The arterial puncture needle further comprises a needle tube sleeve, wherein the needle tube sleeve is sleeved outside the indwelling needle catheter 2 and the puncture needle tube 18 and is slightly longer than the puncture needle tube 18, and the arterial puncture needle is used for protecting the indwelling needle catheter 2 and the puncture needle tube 18 and preventing the puncture needle tube 18 from injuring a person by mistake.
Through setting up extrusion piece 13 and the extrusion device of rubber material, realized blocking (will about the shutoff of rubber tube 13-1) of pipe seat 1 passageway, keep somewhere when needle pipe 2 and puncture needle tube 18 insert the artery, compress tightly extrusion piece 13 through the extrusion device, keep somewhere needle pipe 2 and puncture needle tube 18 be difficult for separating, when puncture needle tube 18 pulls out, need not to unclamp extrusion device, directly take out can, under the pressure effect, the rubber tube 13-1 at extrusion piece 13 middle part can be collapsed, realizes blocking of pipe seat 1 passageway, has avoided spouting the emergence of blood.
The extrusion device comprises an upper pressing plate 4 arranged above an extrusion block 13 and a lower pressing plate 5 arranged below the extrusion block 13, wherein the upper pressing plate 4 and the lower pressing plate 5 are symmetrically arranged relative to the extrusion block 13, a synchronous extrusion mechanism is arranged between the upper pressing plate 4 and the lower pressing plate 5, and the synchronous extrusion mechanism is provided with two groups and symmetrically arranged on two sides of the upper pressing plate 4. The upper pressure plate 4 top is vertical to be equipped with screw rod 11, the pipe seat 1 top seted up with screw rod 11 assorted screw hole, screw rod 11 bottom card is located pipe seat 1 top can take screw rod 11 axis as the axle free rotation, screw rod 11 top is equipped with handle 12. Guide blocks 16 are arranged on two sides of the upper pressing plate 4 and the lower pressing plate 5, guide grooves 1-1 matched with the guide blocks 16 are vertically formed in two side walls of the guide pipe seat 1, and the upper pressing plate 4 and the lower pressing plate 5 are ensured to slide up and down along the vertical direction. The extrusion device realizes compaction through the screw 11, realizes blood flow blocking, and avoids instant impact on the indwelling needle when opening and closing the channel of the catheter seat 1.
The synchronous extrusion mechanism comprises two connecting rods 6 which are arranged between the upper pressing plate 4 and the lower pressing plate 5 in a crossing mode, a fixed shaft 7 is arranged in the middle of each connecting rod 6 in a penetrating mode, the fixed shaft 7 is fixedly arranged on the side wall inside the catheter seat 1, and a bearing is arranged between each connecting rod 6 and each fixed shaft 7. The two ends of the connecting rod 6 are hinged with sliding blocks 8, sliding grooves 15 matched with the sliding blocks 8 are formed in the inner sides of the upper pressing plate 4 and the lower pressing plate 5, and the sliding blocks 8 are clamped in the sliding grooves 15. The inner side of the synchronous extrusion mechanism is provided with a side baffle plate 9, and the side baffle plate 9 is fixedly arranged on the inner side wall of the catheter seat 1 through a mounting column 10. A cushion block 14 is arranged between the middle parts of the two connecting rods 6, and the cushion block 14 is sleeved on the fixed shaft 7. The extrusion device adopts a synchronous extrusion mechanism with special design, and the upper pressing plate 4 and the lower pressing plate 5 synchronously draw close to the middle part of the extrusion block, so that the puncture needle tube 18 is prevented from deforming under the action of pressure when the channel of the catheter seat 1 is blocked.
The specific using method comprises the following steps:
firstly, a puncture needle is inserted into a channel of the indwelling needle, the handle 12 is rotated to enable the screw rod 11 to move downwards, the screw rod 11 props against the upper pressing plate 4 to move downwards along the guide groove 1-1, under the action of the synchronous extrusion mechanism, the lower pressing plate 5 synchronously moves upwards to extrude the extrusion block 13, the extrusion block 13 is compressed and deformed, and the rubber tube 13-1 in the middle is compressed and deformed, so that the puncture needle tube 18 is clamped.
Then, the puncture needle tube 18 and the indwelling catheter 2 are inserted into the arterial blood vessel, and the puncture needle is pulled out. Because the extrusion block 13 is made of rubber and is subjected to extrusion force, after the puncture needle tube 18 is separated from the rubber tube 13-1, the rubber tube 13-1 can be rapidly shrunken, so that the backflow of blood is prevented, and the blood injection is prevented.
Finally, the arterial pressure measuring device is connected to the pressure measuring joint 3, the handle 12 is reversely rotated, the upper pressing plate 4 moves upwards along the guide groove 1-1, the lower pressing plate 5 moves downwards synchronously under the action of the synchronous extrusion mechanism, the extrusion block 13 restores the prototype, and the rubber tube 13-1 is penetrated again, so that arterial blood pressure monitoring is carried out.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The arterial puncture needle is characterized by comprising an indwelling needle and a puncture needle inserted into the indwelling needle, wherein the indwelling needle comprises a catheter seat (1), an indwelling needle catheter (2) arranged at the front end of the catheter seat (1) and a pressure measuring joint (3) arranged at the rear end of the catheter seat (1), the catheter seat (1) is a square shell with an opening at the bottom, a cylindrical extrusion block (13) is arranged in the catheter seat (1), the extrusion block (13) is coaxially arranged with the indwelling needle catheter (2) and the pressure measuring joint (3), the extrusion block (13) is made of a high-elasticity material with reversible deformation, a through hole is formed in the middle of the extrusion block (13) along the axis, a rubber tube (13-1) is arranged in the through hole, two ends of the rubber tube (13-1) are respectively communicated with the indwelling needle catheter (2) and the pressure measuring joint (3), and an extrusion device for compacting the extrusion block (13) is arranged in the catheter seat (1);
The extrusion device comprises an upper pressing plate (4) arranged above the extrusion block (13) and a lower pressing plate (5) arranged below the extrusion block (13), wherein synchronous extrusion mechanisms are arranged between the upper pressing plate (4) and the lower pressing plate (5), and are provided with two groups and are symmetrically arranged on two sides of the upper pressing plate (4); a screw rod (11) is vertically arranged above the upper pressing plate (4), a threaded hole matched with the screw rod (11) is formed in the top of the catheter seat (1), and the bottom of the screw rod (11) is hinged with the top of the catheter seat (1); guide blocks (16) are arranged on two sides of the upper pressing plate (4) and the lower pressing plate (5), and guide grooves (1-1) matched with the guide blocks (16) are vertically formed in two side walls of the guide pipe seat (1);
The synchronous extrusion mechanism comprises two connecting rods (6) which are arranged between the upper pressing plate (4) and the lower pressing plate (5) in a crossing way, a fixed shaft (7) is arranged in the middle of each connecting rod (6) in a penetrating way, and the fixed shaft (7) is fixedly arranged on the side wall of the inside of the catheter seat (1); two ends of the connecting rod (6) are hinged with sliding blocks (8), sliding grooves (15) matched with the sliding blocks (8) are formed in the inner sides of the upper pressing plate (4) and the lower pressing plate (5), and the sliding blocks (8) are clamped in the sliding grooves (15);
The puncture needle comprises a puncture needle seat (17), side wings (19) arranged on two sides of the puncture needle seat (17) and a puncture needle tube (18) arranged at the front end of the puncture needle seat (17).
2. An arterial puncture needle according to claim 1, characterized in that a side baffle (9) is arranged on the inner side of the synchronous extrusion mechanism, and the side baffle (9) is fixedly arranged on the inner side wall of the catheter seat (1) through a mounting column (10).
3. An arterial puncture needle according to claim 1, characterized in that a bearing is arranged between the connecting rod (6) and the fixed shaft (7).
4. An arterial puncture needle according to claim 1, characterized in that a cushion block (14) is arranged between the middle parts of the two connecting rods (6), and the cushion block (14) is sleeved on the fixed shaft (7).
5. An arterial puncture needle according to claim 1, characterized in that the extrusion block (13) is of rubber material.
6. An arterial puncture needle according to claim 1, characterized in that the screw (11) is provided with a handle (12) at the top.
7. An arterial puncture needle according to claim 1, characterized in that it further comprises a needle cannula which is arranged outside the indwelling needle catheter (2) and the puncture needle tube (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515127.XA CN110123282B (en) | 2019-06-14 | 2019-06-14 | Arterial puncture needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515127.XA CN110123282B (en) | 2019-06-14 | 2019-06-14 | Arterial puncture needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110123282A CN110123282A (en) | 2019-08-16 |
| CN110123282B true CN110123282B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515127.XA Active CN110123282B (en) | 2019-06-14 | 2019-06-14 | Arterial puncture needle |
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| CN (1) | CN110123282B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110975113B (en) * | 2019-12-23 | 2022-02-15 | 张杰民 | Counterpulsation pump pipeline of external blood pump aorta counterpulsation circulation auxiliary device |
| CN110897625A (en) * | 2019-12-25 | 2020-03-24 | 河北省中医院 | Sufficient detector of diabetes |
| CN113476025B (en) * | 2021-07-06 | 2023-07-25 | 南通大学附属医院 | Puncture needle for monitoring pressure of invasive artery |
| CN115837104A (en) * | 2022-11-24 | 2023-03-24 | 中国人民解放军总医院第六医学中心 | Puncture needle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210408395U (en) * | 2019-06-14 | 2020-04-28 | 河北省中医院 | Artery puncture needle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201609524U (en) * | 2010-01-11 | 2010-10-20 | 吴林元 | Enclosed type cannule capable of sampling blood |
| CN201920711U (en) * | 2010-12-28 | 2011-08-10 | 上海市第十人民医院 | Arterial puncture needle |
| CN103948984B (en) * | 2014-04-11 | 2017-01-11 | 李泉 | Arterial remaining needle capable of displaying arterial pulsation |
| CN204121524U (en) * | 2014-06-10 | 2015-01-28 | 丁培琪 | anti-reflux venous indwelling needle |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210408395U (en) * | 2019-06-14 | 2020-04-28 | 河北省中医院 | Artery puncture needle |
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