CN111437015A

CN111437015A - Liquid leakage prevention lumbar puncture needle

Info

Publication number: CN111437015A
Application number: CN202010410093.0A
Authority: CN
Inventors: 周超; 陈俊; 刘盈; 任玥
Original assignee: Jiangxi Provincial Peoples Hospital
Current assignee: Jiangxi Provincial Peoples Hospital
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-07-24

Abstract

The invention relates to a liquid leakage prevention lumbar puncture needle, which comprises a needle tube and a needle core, wherein the needle tail part of the needle tube is provided with a notch connected with a pressure measuring tube or a collecting tube; the needle tail part is internally provided with a T-shaped pore passage, the T-shaped pore passage is provided with a main pore passage for the needle core to pass through and a branch pore passage communicated with the notch, and the T-shaped pore passage is divided into a main pore passage front side part, a main pore passage tail side part and a branch pore passage by taking the intersection of the main pore passage and the branch pore passage as a boundary; the diameter of the tail side part of the main duct is larger than the outer diameter of the needle core, a one-way valve assembling groove is formed in the tail side part of the main duct, and a silica gel one-way valve is fixedly installed in the one-way valve assembling groove; and a switch type one-way valve is arranged in the branch hole channel. The invention can conveniently close the open hole at the tail part of the needle tube in the operation process of the lumbar puncture, and can effectively control the loss of cerebrospinal fluid in the process of the lumbar puncture.

Description

Liquid leakage prevention lumbar puncture needle

Technical Field

The invention relates to the technical field of medical instruments, in particular to a liquid leakage prevention lumbar puncture needle.

Background

Lumbar puncture is a common operation technique in clinic, and aims to take a certain amount of cerebrospinal fluid specimen and definitely diagnose infection, tumor and craniocerebral diseases by detecting the cell number, the form, the content of various substances and the cerebrospinal fluid pressure of the cerebrospinal fluid. The most major contraindication of lumbar puncture is intracranial hypertension, which can cause cerebral hernia. This is one of the clinical emergencies, and improper treatment can lead to the death of patients due to the stress of vital centers.

As shown in fig. 1, the surgical instrument used for lumbar puncture is a lumbar puncture needle, which comprises a needle tube and a needle core sleeved in the needle tube. When implementing the puncture art, need insert the needle core operation in the needle tubing, the puncture is accomplished the back, extracts the needle core, can connect the piezometric tube through the trompil of needle tubing afterbody and measure intracranial pressure, extracts the piezometric tube after the piezometric is accomplished, then connects the collecting pipe through the trompil of needle tubing afterbody and collects cerebrospinal fluid.

The prior surgical instrument has the following problems: firstly, after the puncture is successful, the needle core is pulled out, and then the piezometer tube is connected, so that cerebrospinal fluid is easily wasted, the process is complicated, and the infection risk is increased; secondly, after the pressure measurement of the cerebrospinal fluid is finished, the pressure measuring tube is pulled out, so that the cerebrospinal fluid is easily wasted again; finally, even if the needle core is inserted again immediately after the piezometer tube is pulled out, the collecting tube is prepared, and then the needle core is pulled out to collect cerebrospinal fluid, so that the loss of the cerebrospinal fluid can be reduced, the operation steps are complex, a plurality of medical workers are required to cooperate, and the occupation of medical resources is increased.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the liquid leakage prevention lumbar puncture needle which can conveniently close the opening at the tail part of the needle tube in the operation process of the puncture operation and effectively control the loss of cerebrospinal fluid in the process of the lumbar puncture operation.

The technical scheme for solving the technical problems is as follows: a liquid leakage preventing lumbar puncture needle comprises a needle tube and a needle core, wherein the needle tail part of the needle tube is provided with a notch connected with a pressure measuring tube or a collecting tube; the needle tail part is internally provided with a T-shaped pore passage, the T-shaped pore passage is provided with a main pore passage for the needle core to pass through and a branch pore passage communicated with the notch, and the T-shaped pore passage is divided into a main pore passage front side part, a main pore passage tail side part and a branch pore passage by taking the intersection of the main pore passage and the branch pore passage as a boundary; the diameter of the tail side part of the main duct is larger than the outer diameter of the needle core, a one-way valve assembling groove is formed in the tail side part of the main duct, and a silica gel one-way valve is fixedly installed in the one-way valve assembling groove; and a switch type one-way valve is arranged in the branch hole channel.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the switch-type check valve has a knob-type switch.

Further, the silica gel check valve is provided with a plurality of, closely arrange.

Furthermore, a sealing ring is fixedly arranged in an opening at the tail end of the needle tail part for the needle core to pass through.

Furthermore, a sealing plug for opening and closing the opening is arranged at the opening through which the needle core passes at the tail end of the needle tail part.

Furthermore, a sealing interface connected with a collecting pipe of the piezometric tube or the cerebrospinal fluid is arranged in the notch.

Preferably, a sealing cover is arranged at the sealing interface.

Further, the needle point of the needle core is a conical needle point.

The invention has the beneficial effects that: according to the invention, the opening and closing of the opening at the tail part of the needle are controlled by the three-way valve, and the needle core is pulled out once after the puncture is successful without being repeatedly inserted back, so that the infection risk is reduced; the needle tail part is provided with the notch, and meanwhile, the three-way valve at the needle tail part is rotated to conveniently measure the pressure of cerebrospinal fluid and collect the cerebrospinal fluid, so that the lumbar puncture drug delivery is facilitated, and the waste of the cerebrospinal fluid is avoided; according to the invention, the one-way valve is arranged in the opening at the tail part of the needle, so that the cerebrospinal fluid cannot leak when the needle core is directly pulled out after the puncture is finished, a doctor does not need to control the pulling degree to seal the opening at the tail part of the needle when the needle core is pulled out, the complex operation is avoided, the whole puncture process can be finished by only one medical care personnel, and the medical resources are greatly saved.

Drawings

FIG. 1 is a schematic structural view of a conventional lumbar puncture needle;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic cross-sectional view of the lumbar puncture needle in a puncturing state according to the present invention;

FIG. 4 is a schematic cross-sectional view of the lumbar puncture needle for pressure measurement and cerebrospinal fluid taking status of the present invention;

FIG. 5 is an enlarged view of a portion of the structure of FIG. 3 at A;

FIG. 6 is a schematic structural view of a silica gel check valve according to the present invention;

in the figure: 1. the needle tube, 2, the needle core, 3, the needle tail, 4, the needle core handle, 5, the notch, 6, the pressure measuring tube or the collecting tube, 7, the one-way valve assembling groove, 8, the silica gel one-way valve, 9, the sealing ring, 10, the sealing plug, 11, the sealing cover, 12 and the one-way valve.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 2 to 4, the lumbar puncture needle with liquid leakage prevention designed by the invention comprises a needle tube 1 and a needle core 2. The needle tube 1 is hollow, and the tail end is provided with a needle tail part 3. The needle core 2 penetrates into the needle tube 1 when in use, and the tail part of the needle core 2 is fixedly provided with a needle core handle 4, so that the holding operation is convenient.

The needle tail part 3 of the needle tube 1 is provided with a notch 5 connected with a pressure measuring tube or a collecting tube 6. When in use, the pressure measuring tube is used for connecting with a pressure measuring tube to measure pressure, and after the pressure is measured, the pressure measuring tube is used for connecting with a collecting tube to collect cerebrospinal fluid.

The needle tail portion is internally provided with a T-shaped pore passage which is provided with a main pore passage for the needle core 2 to pass through and a branch pore passage communicated with the notch, and the T-shaped pore passage is divided into a main pore passage front side portion, a main pore passage tail side portion and a branch pore passage by taking the intersection of the main pore passage and the branch pore passage as a boundary. The part of the main duct close to the needle point of the needle core 2 with the junction as the boundary is the front side part of the main duct, and the part close to the needle tail part 3 is the tail side part of the main duct. The aperture of the tail side part of the main channel is larger than the outer diameter of the needle core 2, a one-way valve assembling groove 7 is formed in the tail side part of the main channel, and a silica gel one-way valve 8 is fixedly installed in the one-way valve assembling groove 7. And a switch type one-way valve 12 is arranged in the branch hole channel.

The T-shaped pore passage, the notch 5, the silica gel one-way valve 8 and the one-way valve 12 are basic core components of the invention, and aim to arrange three channels in the needle tail part 3, wherein the main channel is used for the penetration of the needle core 2, the branch channel is used for connecting the pressure measuring tube or the collecting tube 6, the silica gel one-way valve 8 is arranged to control the opening and closing of the main channel, and the one-way valve 12 is arranged to control the opening and closing of the branch channel, thereby realizing the accurate control of the cerebrospinal fluid outflow passage in the lumbar puncture process. The above-described structure can thus be in various forms regardless of the shape in the drawings. For example, the notch 5 may be a circular or square opening. The check valve 12 can be controlled by a knob switch or a toggle switch. Meanwhile, the aperture of the tail side part of the main pore canal is larger than the outer diameter of the needle core 2, so that whether the puncture is successful or not can be judged by medical staff during the puncture. After the puncture is finished, when the needle core 2 is pulled out, when the needle core 2 is pulled to the tail side part of the main duct and is not pulled away from the silica gel one-way valve 8, cerebrospinal fluid can flow out from the gap where the silica gel one-way valve 8 is propped up by the needle core 2 along the gap between the tail side part of the main duct and the needle core 2. By judging whether the cerebrospinal fluid flows out or not, the medical care personnel can accurately judge whether the puncture operation is successful or not.

The core of the invention is that the silica gel one-way valve 8 is arranged, and the passage of the needle tail part 3 for the needle core 2 to penetrate and draw out can be immediately closed after the needle core 2 is drawn out, so that the waste of cerebrospinal fluid caused by the outflow of cerebrospinal fluid is avoided. Meanwhile, after the silica gel one-way valve 8 is arranged, during operation, the tail part of the needle core 2 does not need to be used for sealing a passage for the needle tail part 3 to be penetrated and drawn out by the needle core 2, so that the operation difficulty of medical personnel is greatly reduced, and the operation process is simplified; meanwhile, after the silica gel one-way valve 8 is arranged, the needle core 2 is directly pulled out after puncture, and a sealed passage does not need to be repeatedly inserted, so that the infection risk is greatly reduced. And the subchannel in "T" shape pore sets up check valve 12 for control the switching of notch 5, when the pressure measurement with collect the cerebrospinal fluid, can avoid the cerebrospinal fluid to spill over, lead to extravagant cerebrospinal fluid.

As shown in fig. 2, the present invention also provides an improved solution in which the on-off check valve 12 has a knob-type switch. Is convenient for the medical staff to operate.

The silica gel one-way valve 8 can be provided in plurality and arranged next to each other. Thus, the sealing effect can be effectively ensured. As shown in fig. 6, the silicone check valve 8 of the present invention has a cylindrical body made of silicone material, and a pair of elastic silicone sealing diaphragms are provided at the front end for one-way sealing. The silica gel one-way valve 8 used in the present invention is commercially available.

The needle tail part 3 can be prepared by adopting a sectional injection molding mode, and the multiple sections are connected by adopting a bonding or ultrasonic welding mode after the silica gel one-way valve 8 is arranged.

As shown in fig. 3 to 5, the present invention further provides an improved technical solution, in the improved technical solution, a sealing ring 9 is fixedly arranged in an opening at the tail end of the needle tail portion 3 through which the stylet 2 passes.

Set up sealing washer 9 except can utilizing nook closing member 2 to seal the major channel of afterbody 3 under the sealed not tight condition of silica gel check valve 8 when extracting nook closing member 2, can also seal nook closing member 2 and needle tubing 1 when the puncture with extract nook closing member 2, avoid cerebrospinal fluid to spill over from the gap between nook closing member 2 and the needle tubing 1, also can avoid infecting through sealed isolated external.

As shown in fig. 2, the present invention provides another improved technical solution, in which a sealing plug 10 for opening and closing the opening is provided at the opening through which the stylet 2 passes at the tail end of the needle tail portion 3.

Above-mentioned modified technical scheme sets up the trompil that sealing plug 10 can supply nook closing member 2 to pass at 3 tail ends of sealing needle afterbody when brain pressure is too big, and silica gel check valve 8 forms double containment, further improves sealing performance. Meanwhile, the arranged sealing ring 9 can be well matched with the sealing plug 10 to form tight sealing.

As shown in fig. 2, 4 and 5, the present invention also provides an improved solution, in which a sealing interface (not shown) connected with a pressure measuring tube or a collecting tube 6 is arranged in the notch 5.

Preferably, a sealing cover 11 is provided at the sealing interface.

The scheme is to ensure that the cerebrospinal fluid cannot overflow from the notch 5 when sampling or collecting the cerebrospinal fluid. And set up sealed lid 11, can seal notch 5 when the puncture operation, avoid external bacterium to enter into afterbody 3 in, greatly reduce the incidence of infection.

In order to better match the structure of the silica gel one-way valve 8, the needle point of the needle core 2 is preferably a conical needle point. Therefore, when the stylet 2 is inserted, the needle point of the stylet 2 can be ensured not to puncture the elastic silica gel sealing membrane of the silica gel one-way valve 8, and the needle can be accurately punctured from the joint of the two elastic silica gel sealing membranes.

When the invention is used, the operation process is as follows:

firstly, the lumbar puncture needle of the invention is taken out, the notch 5 of the needle tail part 3 is ensured to be in the sealing state of the sealing cover 11, the one-way valve 12 at the notch 5 is ensured to be in the closing state, the needle core 2 is in the state of being inserted into the needle tube 1, and then the puncture position is determined.

Then, the puncturing operation is performed. The medical staff punctures the needle core 2, pulls out the needle core 2 after the puncture is successful, stops pulling out when the scale on the needle core 2 is exposed, and observes whether cerebrospinal fluid flows out. If cerebrospinal fluid flows out, the puncture is successful, and then the needle core 2 is directly drawn out. At the moment, the silica gel one-way valve 8 can immediately close the passage of the needle core 2 to avoid the overflow of cerebrospinal fluid. Finally, the sealing plug 10 is plugged, and cerebrospinal fluid cannot flow out. If the needle core 2 is pulled out after puncture, no cerebrospinal fluid flows out, the puncture fails, and medical care personnel are required to perform the puncture operation again.

Then, opening a sealing cover 11 of the notch 5, connecting the pressure measuring pipe (rotating the needle tube 1 to enable the pressure measuring pipe to be vertically upward), controlling a one-way valve 12 to be opened, enabling a passage for communicating the needle tube 1 and the notch 5 to be in a conducting state, and measuring pressure according to a reading obtained by the pressure measuring pipe; after pressure measurement is finished, the check valve 12 is controlled to be closed, the notch 5 is closed, the pressure measurement pipe is taken down, the collecting pipe is connected (the needle tube 1 is rotated to enable the collecting pipe to face downwards vertically), the check valve 12 is opened again, a passage through which the needle tube 1 is communicated with the notch 5 is in a conducting state again, and cerebrospinal fluid flows into the collecting pipe.

And finally, after collecting the cerebrospinal fluid, closing the one-way valve 12 again, closing the notch 5, taking down the collecting pipe, and then pulling out the needle tube 1, thereby completing the lumbar puncture. The leakage of cerebrospinal fluid can not be generated in the whole process, the cerebrospinal fluid in the needle tail part 3 can not be in direct contact with the external environment, the safety is greatly improved, and the waste of the cerebrospinal fluid is effectively avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a waist of prevention of liquid leakage is worn needle, includes needle tubing (1) and nook closing member (2), its characterized in that: a notch (5) connected with a pressure measuring pipe or a collecting pipe (6) is formed in the needle tail part (3) of the needle tube (1); a T-shaped pore passage is arranged in the needle tail part (3), the T-shaped pore passage is provided with a main pore passage for the needle core (2) to pass through and a branch pore passage communicated with the notch (5), and the T-shaped pore passage is divided into a main pore passage front side part, a main pore passage tail side part and a branch pore passage by taking the intersection of the main pore passage and the branch pore passage as a boundary; the aperture of the tail side part of the main duct is larger than the outer diameter of the needle core (2), a one-way valve assembling groove (7) is formed in the tail side part of the main duct, and a silica gel one-way valve (8) is fixedly installed in the one-way valve assembling groove (7); and a switch type one-way valve (12) is arranged in the branch hole channel.

2. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: the switch-type check valve (12) is provided with a knob-type switch.

3. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: the silica gel one-way valves (8) are arranged in a plurality of adjacent arrangement.

4. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: and a sealing ring (9) is fixedly arranged in an opening at the tail end of the needle tail part (3) for the needle core (2) to pass through.

5. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: and a sealing plug (10) for opening and closing the opening is arranged at the opening through which the needle core (2) passes at the tail end of the needle tail part (3).

6. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: and a sealing interface connected with a collecting pipe (6) of a piezometric tube or cerebrospinal fluid is arranged in the notch (5).

7. The liquid leakage prevention lumbar puncture needle according to claim 6, characterized in that: and a sealing cover (11) is arranged at the sealing interface.

8. The liquid leakage prevention lumbar puncture needle according to claim 1, characterized in that: the needle point of the needle core (2) is a conical needle point.