CN105496516B - Closed arteriovenous puncture trocar - Google Patents
Closed arteriovenous puncture trocar Download PDFInfo
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- CN105496516B CN105496516B CN201510893668.8A CN201510893668A CN105496516B CN 105496516 B CN105496516 B CN 105496516B CN 201510893668 A CN201510893668 A CN 201510893668A CN 105496516 B CN105496516 B CN 105496516B
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- switch
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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
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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
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- Gastroenterology & Hepatology (AREA)
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Abstract
The invention discloses a closed arteriovenous puncture trocar, aiming at providing a closed arteriovenous puncture trocar with the following structure, which has the technical scheme that the closed arteriovenous puncture trocar comprises a puncture needle and a cannula, wherein the cannula comprises a head part provided with a soft needle tube and a cannula main body provided with a passage, the cannula main body is provided with a switch for controlling the opening and closing of the passage, the switch is provided with a cavity communicated with the passage, and an elastic sealing element is hermetically matched in the cavity. Through setting up the switch that the control path opened and shut, the stable operation trocar that can be convenient is closed, and the switch be equipped with the cavity of route UNICOM, cavity internal seal cooperate elastic sealing member, the syringe needle can directly pass elastic sealing member and get into the cavity promptly, can be directly carry out the input normal saline after the exhaust and the dialysis of preflushing to the apparatus inner chamber.
Description
Technical Field
The invention relates to medical equipment, in particular to a closed arteriovenous puncture trocar.
Background
At present, an arteriovenous puncture trocar mainly comprises a puncture needle and a cannula, wherein the head of the cannula is provided with a flexible catheter which is sleeved on the puncture needle, after a medical worker uses an arteriovenous puncture cannula to puncture an arteriovenous blood vessel of a patient, the puncture needle is pulled out of the flexible catheter, the flexible catheter is reserved in the venous blood vessel of the patient, and an extracorporeal blood circulation passage is established with the patient through the catheter to perform dialysis treatment.
However, before the arteriovenous puncture trocar is used, the air in the inner cavity of the device needs to be pre-flushed and removed by using physiological saline, and after dialysis is finished, the blood in the extracorporeal blood circulation path needs to be transfused into the body of a patient by using the physiological saline, and the prior methods for solving the problems comprise: the arterial end of the dialysis pipeline is disconnected and connected with the physiological saline pipeline or the physiological saline pipeline is connected with a branch on the arterial pipeline, and the current operation methods are all in open mode operation, so that the risk of pathogen cross infection is easily caused, the blood in the inner cavity of the extracorporeal circulation blood circuit cannot be completely returned to the body of a patient, the blood of the patient is lost, the life safety of the patient and medical care operators is threatened, and the structure is complex, the size is large, and the operation is not convenient.
Disclosure of Invention
The invention aims to solve the technical problem of providing a closed arteriovenous puncture trocar which has small volume and simple structure and is convenient to use.
The invention provides a closed arteriovenous puncture trocar with the following structure, which comprises a puncture needle and a cannula, wherein the cannula comprises a head part provided with a soft needle tube and a cannula main body provided with a passage, the cannula main body is provided with a switch for controlling the opening and closing of the passage, the switch is provided with a cavity communicated with the passage, and an elastic sealing element is hermetically matched in the cavity.
After adopting the structure, compared with the prior art, the closed arteriovenous puncture trocar has the following advantages: the invention creatively arranges the middle part of the switch as an injection port or a connecting port to ensure that the closed arteriovenous puncture trocar can pre-flush and exhaust the inner cavity of the instrument and return the blood in the inner cavity of the extracorporeal blood circulation passage to the patient in a closed environment, greatly reduces the risk of cross infection of the patient and medical care personnel and can completely return the blood of the patient in the inner cavity of the extracorporeal blood circulation passage to the patient, the structure is very simple, the operation of medical staff is convenient, and the production cost is greatly reduced, in addition, the invention can also be used for transfusion, and the switch and the elastic sealing element can be used as an input port in emergency.
The switch comprises a rotating block which is rotatably matched with the sleeve main body, a first through hole communicated with the passage is arranged in the direction of the rotating block vertical to the axis, a second through hole is arranged on the inner side wall of the first through hole, the axis of the second through hole is respectively vertical to the axis of the rotating block and the axis of the first through hole, and the second through hole is added, so that the direction of injecting liquid from the elastic sealing element can be controlled, and the sealed arteriovenous puncture trocar has the functions of pre-flushing and exhausting the inner cavity of an instrument and completely returning the blood in the inner cavity of the extracorporeal circulation passage to the body of a patient in a sealed environment.
As an improvement of the invention, the switch penetrates through the sleeve main body, the two ends of the cavity are in sealing fit with the elastic sealing elements, and different needles can be respectively inserted from the two ends of the switch by sealing fit with the elastic sealing elements at the two ends of the cavity, so that the use is more convenient.
As another improvement of the invention, the sleeve main body is provided with a plurality of switches with elastic sealing elements, and the switches are provided with at least 1 elastic sealing element, so that the switches are added, the control effect of the whole structure is better, the safety is improved, and the use by people is convenient.
As a further improvement, the sleeve main body is connected with the head through a flexible conduit, so that the flexibility of the whole structure is increased, the movement of the sleeve main body cannot directly act on the soft needle tube, the comfort is improved, and the soft needle tube is not easy to break or deform.
As a further improvement of the invention, the switch is provided with a clamping assembly for fixing the catheter or the needle head, the clamping assembly is rotatably connected to the top of the switch to further fix the needle head penetrating into the elastic sealing element, the medical care personnel can use the switch conveniently, the size is small, and the switch can be used as a switch handle to rotate the switch, so that the operability is further improved.
As a further improvement, the top of the switch is provided with a protective cover attached to the elastic sealing piece, so that the elastic sealing piece is prevented from being polluted, and the safety is improved.
As a further improvement of the invention, the side wall of the soft needle tube is provided with the through hole, so that the flow of blood can be greatly improved, and the soft needle tube has stronger conductivity.
As a further improvement of the invention, the head is detachably connected with a protective sleeve for protecting the flexible needle tube and the puncture needle, the top of the protective sleeve is provided with a through hole to ensure the safety of the flexible needle tube and the puncture needle before use, and the top of the protective sleeve is provided with the through hole, so that when physiological saline is used for pre-flushing and removing air in the inner cavity of the instrument, the operation can be carried out without pulling the protective sleeve, the air and the physiological saline flow out from the through hole, the operation of medical personnel is facilitated, the contact between the flexible needle tube and the puncture needle and the outside is reduced, and the pollution probability is reduced.
As a further improvement, the soft needle tube is provided with the intermediate layer containing barium sulfate, namely, in case of breakage or falling off of the soft needle tube, the broken soft needle tube is left in the blood vessel and is difficult to detect, and after the intermediate layer containing barium sulfate is arranged, the soft needle tube can be detected, so that the safety is greatly improved.
Drawings
Fig. 1 is a schematic structural view of a closed arteriovenous puncture trocar according to the present invention.
Fig. 2 is a schematic cross-sectional view taken along a-a in fig. 1.
Shown in the figure: 1. puncturing needle; 2. a sleeve; 21. a soft needle tube; 22. a head portion; 23. a passage; 24. a cannula body; 25. a protective sleeve; 3. a switch; 31. a cavity; 32. an elastomeric seal; 33. rotating the block; 34. a first through hole; 35. a second through hole; 4. a flexible conduit.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1 and 2, the invention provides a closed arteriovenous puncture cannula 2 needle having the following structure, comprising a puncture needle 1 and a cannula 2, wherein the cannula 2 comprises a head 22 provided with a soft needle tube 21 and a cannula main body 24 provided with a passage 23, the cannula main body 24 is provided with a switch 3 for controlling the opening and closing of the passage 23, the switch 3 is provided with a cavity 31 communicated with the passage 23, an elastic sealing member 32 is hermetically matched in the cavity 31, the closing of the cannula 2 needle can be conveniently and stably operated by arranging the switch 3 for controlling the opening and closing of the passage 23, the switch 3 is provided with a cavity 31 communicated with the passage 23, the cavity 31 is hermetically matched with the elastic sealing member 32, namely, the needle head can directly penetrate through the elastic sealing member 32 to enter the cavity 31, namely, the needle head can directly pre-flush and exhaust the inner cavity of an apparatus and input physiological saline after dialysis, the invention creatively sets the middle part of the switch 3 as an injection port or a connection port, ensures that the closed arteriovenous puncture cannula 2 needle can pre-flush and exhaust the inner cavity of the instrument and return the blood in the inner cavity of the extracorporeal blood circulation passage 23 to the patient in a closed environment, greatly reduces the risk of cross infection of the patient and medical personnel, and can completely return the blood in the inner cavity of the extracorporeal blood circulation passage 23 to the body.
The switch 3 comprises a rotating block 33 which is rotatably matched with the sleeve main body 24, a first through hole 34 communicated with the passage 23 is arranged in the direction perpendicular to the axis of the rotating block 33, a second through hole 35 is arranged on the inner side wall of the first through hole 34, the axis of the second through hole 35 is respectively perpendicular to the axis of the rotating block 33 and the axis of the first through hole 34, and the second through hole 35 is added, so that the direction of liquid injected from the elastic sealing element 32 can be controlled, and the closed arteriovenous puncture sleeve 2 has the functions of pre-flushing and exhausting the inner cavity of an instrument and completely returning the blood in the inner cavity of the extracorporeal circulation passage 23 to the body of a patient in a closed environment.
Switch 3 run through sleeve pipe main part 24, cavity 31 both ends seal fit elastic sealing element 32, through at cavity 31 both ends seal fit elastic sealing element 32, can insert different syringe needles respectively from switch 3 both ends, it is more convenient to use, sleeve pipe main part 24 be equipped with a plurality of switch 3 that are equipped with elastic sealing element 32, it is better to increase the control effect that switch 3 made whole structure, the safety is improved to make things convenient for people to use.
Sleeve pipe main part 24 and head 22 pass through flexible pipe 4 and be connected, increase overall structure's pliability, make sleeve pipe main part 24 remove can not direct action on soft needle tubing 21, improved the travelling comfort, and make the difficult rupture or the deformation of soft needle tubing 21, switch 3 be equipped with the centre gripping subassembly that is used for fixed pipe or syringe needle, the centre gripping subassembly rotate to be connected in switch 3 top, further fixed syringe needle of piercing elastic seal 32 makes things convenient for medical personnel to use, small, and can regard as switch 3 handle rotary switch 3, further improve the operability.
Switch 3 top be equipped with the protective cover with the laminating of elastic sealing element 32, avoid elastic sealing element 32 to be contaminated, improve the security, soft needle tube 21 lateral wall be equipped with the conducting hole, make in the soft needle tube 21 blood circulation more smooth and easy, difficult jam.
As a further improvement of the invention, the head 22 is detachably connected with a protective sleeve 25 for protecting the flexible needle tube 21 and the puncture needle 1, the top of the protective sleeve 25 is provided with a through hole to ensure the safety of the flexible needle tube 21 and the puncture needle 1 before use, and the top of the protective sleeve 25 is provided with the through hole, so that when physiological saline is used for pre-flushing and removing air in a cavity of the instrument, the operation can be carried out without pulling out the protective sleeve 25, the air and the physiological saline flow out from the through hole, the operation of medical personnel is facilitated, the contact between the flexible needle tube 21 and the puncture needle 1 and the outside is reduced, and the pollution probability is reduced.
As a further improvement of the invention, the soft needle tube 21 is provided with the intermediate layer containing barium sulfate, namely, in case that the soft needle tube 21 is broken or falls off, the broken soft needle tube 21 is left in the blood vessel and is difficult to detect, and after the intermediate layer containing barium sulfate is provided, the detection is enabled, thereby greatly improving the safety.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (1)
1. The utility model provides a closed arteriovenous puncture trocar, includes pjncture needle (1) and sleeve pipe (2), sleeve pipe (2) including head (22) that are equipped with soft needle tubing (21) and sleeve pipe main part (24) that are equipped with passageway (23), its characterized in that: the device is characterized in that the sleeve main body (24) is provided with a switch (3) for controlling the opening and closing of the passage (23), the switch (3) penetrates through the sleeve main body (24), the switch (3) is provided with a cavity (31) communicated with the passage (23), two ends of the cavity (31) are in sealing fit with elastic sealing elements (32), a needle head directly penetrates through the elastic sealing elements (32) to enter the cavity (31), and the physiological saline is input after the pre-filling, air exhausting and dialysis of the inner cavity of the device are finished; the sleeve main body (24) is connected with the head (22) through the flexible conduit (4), and the movement of the sleeve main body (24) does not directly act on the soft needle tube (21); the switch (3) comprises a rotating block (33) which is rotatably matched with the sleeve main body (24), a first through hole (34) communicated with the passage (23) is formed in the rotating block (33) in a direction perpendicular to the axis, a second through hole (35) is formed in the inner side wall of the first through hole (34), and the axis of the second through hole (35) is respectively perpendicular to the axis of the rotating block (33) and the axis of the first through hole (34); the sleeve main body (24) is provided with a plurality of switches (3);
the side wall of the soft needle tube (21) is provided with a through hole;
the head (22) is detachably connected with a protective sleeve (25) used for protecting the soft needle tube and the puncture needle (1), the top of the protective sleeve (25) is provided with a through hole, when the physiological saline is used for pre-charging and removing the air in the inner cavity of the instrument, the protective sleeve (25) is not pulled out for operation, and the air and the physiological saline flow out from the through hole;
the soft needle tube (21) is provided with a middle layer containing barium sulfate;
the trocar is used for dialysis;
the switch (3) is provided with a clamping component for fixing a catheter or a needle head, the clamping component is rotatably connected to the top of the switch (3) and can be used as a handle of the switch (3) to rotate the switch (3);
switch (3) top be equipped with the protective cover with elastic sealing element (32) laminating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510893668.8A CN105496516B (en) | 2015-12-07 | 2015-12-07 | Closed arteriovenous puncture trocar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510893668.8A CN105496516B (en) | 2015-12-07 | 2015-12-07 | Closed arteriovenous puncture trocar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105496516A CN105496516A (en) | 2016-04-20 |
| CN105496516B true CN105496516B (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510893668.8A Active CN105496516B (en) | 2015-12-07 | 2015-12-07 | Closed arteriovenous puncture trocar |
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| Country | Link |
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| CN (1) | CN105496516B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1024410A (en) * | 1963-12-30 | 1966-03-30 | Stille Werner Ab | Improvements in or relating to medical apparatus |
| US3774604A (en) * | 1971-01-28 | 1973-11-27 | Demeco Medical Products Ab | Infusion cannula assembly |
| CN1240148A (en) * | 1998-06-23 | 2000-01-05 | 刘文能 | Multi-purpose safety automatic transfusion vein indwelling needle |
| CN203619992U (en) * | 2013-12-09 | 2014-06-04 | 苏州鱼跃医疗科技有限公司 | Remaining needle |
| CN203935469U (en) * | 2014-03-27 | 2014-11-12 | 金富康 | Front end visible blood-flow remaining needle with threeway |
| CN205163202U (en) * | 2015-12-07 | 2016-04-20 | 曾鹏泉 | Closed sound arteries and veins puncture trocar |
-
2015
- 2015-12-07 CN CN201510893668.8A patent/CN105496516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1024410A (en) * | 1963-12-30 | 1966-03-30 | Stille Werner Ab | Improvements in or relating to medical apparatus |
| US3774604A (en) * | 1971-01-28 | 1973-11-27 | Demeco Medical Products Ab | Infusion cannula assembly |
| CN1240148A (en) * | 1998-06-23 | 2000-01-05 | 刘文能 | Multi-purpose safety automatic transfusion vein indwelling needle |
| CN203619992U (en) * | 2013-12-09 | 2014-06-04 | 苏州鱼跃医疗科技有限公司 | Remaining needle |
| CN203935469U (en) * | 2014-03-27 | 2014-11-12 | 金富康 | Front end visible blood-flow remaining needle with threeway |
| CN205163202U (en) * | 2015-12-07 | 2016-04-20 | 曾鹏泉 | Closed sound arteries and veins puncture trocar |
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| Publication number | Publication date |
|---|---|
| CN105496516A (en) | 2016-04-20 |
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Effective date of registration: 20210520 Address after: 315336 building C-6, 777 Binhai Fourth Road, Hangzhou Bay New District, Ningbo City, Zhejiang Province Patentee after: Ningbo Baitong Medical Technology Co.,Ltd. Address before: Room 2-1002, Lane 3598, Tiantong South Road, Yinzhou District, Ningbo City, Zhejiang Province, 315194 Patentee before: Zeng Pengquan |
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