CN113892979B

CN113892979B - Medical tumor pancreas wet negative pressure puncture needle and use method thereof

Info

Publication number: CN113892979B
Application number: CN202111210166.2A
Authority: CN
Inventors: 肖斌; 陈国胜; 袁昊; 赵丽; 范韶卿
Original assignee: Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Current assignee: Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-10-04
Anticipated expiration: 2041-10-18
Also published as: CN113892979A

Abstract

The invention provides a medical tumor pancreas wet negative pressure puncture needle and a using method thereof, wherein the medical tumor pancreas wet negative pressure puncture needle comprises a fixed support assembly, the upper end of the fixed support assembly is clamped with a negative pressure sampler, the lower end of the fixed support assembly is clamped with a puncture outfit, and the negative pressure sampler is communicated with the puncture outfit through a first hose; the center of the bottom of the outer side of the puncture outfit is communicated with a puncture needle, needle cores are arranged in the puncture needle and the puncture outfit, one end of the needle core close to the negative pressure sampler is communicated with a first hose, one side of the bottom of the puncture outfit is communicated with a water bag, and a limiting chuck for limiting the puncture depth of the puncture needle is clamped and connected with the outer side of one end of the puncture needle close to the bottom of the puncture outfit; the negative pressure sampler samples by using a negative pressure principle and has the function of regulating negative pressure; the puncture outfit is used for puncturing the affected part and sampling through the needle core. The invention can reduce the difficulty of operation and improve the safety and stability of operation.

Description

Medical tumor pancreas wet negative pressure puncture needle and use method thereof

Technical Field

The invention belongs to the field of medical instrument puncture needles, and particularly relates to a medical tumor pancreas wet negative pressure puncture needle and a using method thereof.

Background

The puncture is a diagnosis and treatment technology that a puncture needle is punctured into a body cavity to extract secretions, tissues and cells for assay, gas or contrast agent is injected into the body cavity for contrast examination, or medicines are injected into the body cavity, is a common method for clinical disease diagnosis or treatment, and has an irreplaceable effect by other methods. Definitive diagnosis of tumors or cancers requires pathological histological or cytological examinations to determine the degree of the patient's current condition as appropriate for the surgical treatment.

The existing puncture needle mainly uses a common injector to puncture, the operation process is complex and easy to generate errors, the requirements on experience and manipulation of an attending doctor are extremely strict, the operation difficulty is increased, the attention and physical strength of the doctor need to be highly concentrated for long-time operations, and except for collecting samples, a plurality of people need to pay attention to whether the negative pressure and the puncture depth are normal, so that the energy of the doctor is undoubtedly dispersed, the labor force is increased, and the operation process is inconvenient and even can not be smoothly carried out; meanwhile, when the needle core is pulled away after the collection of the sample is finished, air is easily generated at the affected part, and the detection of medical equipment is influenced; in addition, no extra protective measures and devices are provided in the process of collecting the sample, and the existing puncture needle has a single function. Therefore, a medical pancreatic wet negative pressure puncture needle for tumor and a use method thereof are needed to reduce the operation difficulty and improve the operation safety and stability.

Disclosure of Invention

The invention aims to provide a medical pancreatic wet negative pressure puncture needle for tumors and a using method thereof, so as to solve the problems.

In order to achieve the purpose, the invention provides the following scheme: a medical pancreatic wet negative pressure puncture needle for tumor comprises a fixed support assembly, wherein a negative pressure sampler is clamped at the upper end of the fixed support assembly, a puncture outfit is clamped at the lower end of the fixed support assembly, and the negative pressure sampler is communicated with the puncture outfit through a first hose; the center of the bottom of the outer side of the puncture outfit is communicated with a puncture needle, needle cores with cavities are arranged in the puncture needle and the puncture outfit, one end of the needle core close to the negative pressure sampler is communicated with the first hose, one side of the bottom of the puncture outfit is communicated with a water bag, a limiting chuck for limiting the puncture depth of the puncture needle is clamped on the outer side of one end of the puncture needle close to the bottom of the puncture outfit, the puncture needle is slidably connected to the inner side of a gastroscope insertion tube, and the limiting chuck is detachably connected to one end far away from the insertion end of the gastroscope insertion tube;

the negative pressure sampler samples by utilizing a negative pressure principle and has the function of regulating negative pressure; the puncture needle extends into the body through the inner side of the gastroscope insertion tube to reach the affected part directly, and samples are taken through the needle core.

Preferably, the puncture outfit includes the joint and is in the puncture casing of fixed bolster assembly lower extreme, the nook closing member passes from last to bottom the puncture casing, the top of puncture casing is provided with the atmospheric pressure balanced unit, the middle part of puncture casing is provided with and is used for restricting the elastic locating unit of nook closing member, the vertical direction sliding connection in inboard bottom of puncture casing has sealed guide block, just the vertical direction sliding connection of nook closing member is in the inboard center of sealed guide block, sealed guide block with the elastic locating unit butt, the nook closing member with be provided with the clearance between the inside wall of pjncture needle.

Preferably, the air pressure balance unit comprises a plurality of first balance holes arranged at the top of the puncture shell, the first balance holes are circumferentially arranged at equal intervals at the top of the puncture shell, the inner diameters of the first balance holes are sequentially arranged from large to small, the top of the outer side of the puncture shell is rotatably connected with a pressure adjusting rotary disc, the eccentric position of the pressure adjusting rotary disc is provided with a second balance hole, the second balance hole corresponds to the first balance hole in any mode, the inner diameter of the second balance hole is not smaller than that of the first balance hole, and the needle core penetrates through the center of the pressure adjusting rotary disc in the vertical direction.

Preferably, the elastic positioning unit is in including the symmetry setting puncture casing both sides press the briquetting, two press the briquetting along diameter direction sliding connection respectively in the both sides wall of puncture casing, two press the briquetting and be close to one side at puncture casing center is the one end of a pair of elastic push rod of fixedly connected with respectively, two pairs the other end that elastic push rod set up relatively is fixedly connected with arc card respectively, two the arc card with the center coincidence of nook closing member, and two the relative lateral wall of arc card with the vertical direction sliding connection of lateral wall of nook closing member.

Preferably, the center of the elastic push rod is folded in half to form an obtuse angle, and the two obtuse angles of the pair of elastic push rods are arranged oppositely.

Preferably, negative pressure sampler includes the joint and is in the sample casing of fixed bolster assembly upper end, the spacing end cover of top fixedly connected with of sample casing, the piston bore has been seted up at the center of spacing end cover, sliding connection has the piston rod in the piston bore, the piston rod is located the inboard one end of sample casing is rotated and is connected with the rubber sealing plug, the rubber sealing plug with the vertical direction sliding connection of inside wall of sample casing, the piston rod is located the one end in the sample casing outside with set up the spacing unit between the spacing end cover.

Preferably, spacing unit is including setting up coil spring in the sample shell, the coil spring is located the piston rod is close to the one end of rubber sealing plug with between the inside wall of sample shell, the one end fixed connection of coil spring is in on the inside wall of sample shell, the other end sliding connection of coil spring is in the one end of piston rod, the opening has been seted up at the edge of piston hole, the top surface of spacing end cover is close to piston hole edge fixedly connected with stopper, the stopper with the opening is the right angle setting, a plurality of spacing archs of fixedly connected with on the lateral wall of piston rod, it is a plurality of spacing arch is from last heliciform setting down, spacing bellied size is not more than the size of opening, one of them spacing arch simultaneously with the top surface of spacing end cover with a side butt of stopper.

Preferably, the fixed support assembly comprises a support body, a first opening support is fixedly connected to the top end of the support body, a second opening support is fixedly connected to the bottom end of the support body, the center line of the first opening support coincides with the center line of the second opening support, the sampling shell is clamped on the inner side of the first opening support, and the puncture shell is clamped on the inner side of the second opening support.

Preferably, the limiting chuck comprises a fulcrum located at the center of the limiting chuck, the limiting chuck is provided with a first channel and a second channel, the first channel and the second channel are located on two sides of the fulcrum respectively, the opening degree of the second channel is larger than that of the first channel, the edge of the limiting chuck is fixedly connected with two clamping blocks, and the two clamping blocks are located on two sides of the second channel respectively.

Preferably, the method comprises the following steps:

the method comprises the following steps: clamping the negative pressure sampler and the puncture outfit on the fixed bracket assembly;

step two: the puncture needle is inserted into a diseased part under the direct vision of a gastroscope, the puncture needle is fixed at one end of the gastroscope insertion tube through the limiting chuck, and then the tip of the puncture needle is inserted into the edge of a pancreatic lesion along with the needle core;

step three: the sharp end of the puncture needle is positioned at the edge of pathological changes of pancreas under the ultrasonic gastroscope, and the needle core is continuously punctured;

step four: after the sample collection is finished, taking down the fixed support assembly, and collecting the sample through the negative pressure sampler;

step five: and removing the tumor medical pancreas wet negative pressure puncture needle.

The invention has the following technical effects: the puncture needle extends into the body through the gastroscope insertion tube and directly reaches the affected part, when the puncture needle reaches the position near the affected part, the limiting chuck is clamped at the outer side of the puncture needle, and the limiting chuck is detachably connected to one end far away from the insertion end of the gastroscope insertion tube, so that the puncture depth of the puncture needle is limited; the fixing support assembly has the effects that the negative pressure sampler and the puncture outfit are relatively fixed, the stability and the safety in the puncture process are ensured, the puncture effect is prevented from being influenced due to the swing of the negative pressure sampler, after the puncture action of the puncture needle is completed, the needle core is punctured into a patient to collect a sample, then the fixing support assembly is taken off, the negative pressure sampler can change the angle due to the soft texture of the first hose, the collection is carried out at a more proper position, the operation flexibility is improved, the puncture outfit is prevented from being driven to cause the position deviation in the collection process, the injury to a patient is avoided, and the collection process is prevented from being influenced; collecting a sample by operating the negative pressure sampler; when the needle core and the puncture needle are pulled away, the medicament supplementing bag supplements clean water or medicament to the patient, so that the condition that the air is generated at the patient to influence the detection of the medical equipment is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the negative pressure sampler;

FIG. 3 is a schematic top view of a restraining end cap;

FIG. 4 is a front sectional view of the puncture instrument;

FIG. 5 is a schematic top view of the elastic positioning unit;

FIG. 6 is a schematic top view of a pressure adjustment dial;

FIG. 7 is a schematic top view of a spacing chuck;

FIG. 8 is a schematic view of a mounting bracket assembly;

FIG. 9 is a schematic view of an axial groove;

wherein, 1, fixing the bracket assembly; 101. a first open bracket; 102. a stent body; 103. a second open-ended support; 2. a sampling housing; 3. a piston rod; 4. a limiting bulge; 5. a first hose; 6. a needle core; 7. a sampling hand-held part; 8. a pressure regulating turntable; 9. puncturing the housing; 10. pressing the block; 11. a drug branch tube; 12. a water bag; 13. a one-way valve; 14. a second hose; 15. a limiting chuck; 16. puncturing needles; 17. a limiting end cover; 18. opening the gap; 19. a piston bore; 20. a limiting block; 21. a coil spring; 22. a rubber sealing plug; 23. puncturing the handheld block; 24. a first balance hole; 25. an elastic push rod; 26. sealing the guide block; 27. an arc-shaped card; 28. a second balance hole; 29. a first channel; 30. a fulcrum; 31. a second channel; 32. a clamping block; 33. an axial groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

Referring to fig. 1-9, the invention provides a medical tumor pancreatic wet negative pressure puncture needle, which comprises a fixed support assembly 1, wherein a negative pressure sampler is clamped at the upper end of the fixed support assembly 1, a puncture outfit is clamped at the lower end of the fixed support assembly 1, and the negative pressure sampler is communicated with the puncture outfit through a first hose 5; the center of the bottom of the outer side of the puncture outfit is communicated with a puncture needle 16, a needle core 6 with a cavity is arranged in the puncture needle 16 and the puncture outfit, one end of the needle core 6 close to the negative pressure sampler is communicated with a first hose 5, one side of the bottom of the puncture outfit is communicated with a water bag 12, a limiting chuck 15 used for limiting the puncture depth of the puncture needle 16 is clamped on the outer side of one end of the puncture needle 16 close to the bottom of the puncture outfit, the puncture needle 16 is connected to the inner side of the gastroscope insertion tube in a sliding manner, and the limiting chuck 15 is detachably connected to one end far away from the insertion end of the gastroscope insertion tube;

the negative pressure sampler samples by using a negative pressure principle and has the function of regulating negative pressure; the puncture needle 16 is inserted into the body through the gastroscope insertion tube to reach the affected part and a sample is taken through the needle core 6.

The puncture needle 16 extends into the body through the gastroscope insertion tube and directly reaches the affected part, when the puncture needle 16 reaches the position near the affected part, the limiting chuck 15 is clamped at the outer side of the puncture needle 16, and the limiting chuck 15 is detachably connected to one end far away from the insertion end of the gastroscope insertion tube, so that the puncture depth of the puncture needle 16 is limited; the fixed support assembly 1 has the effects that the negative pressure sampler and the puncture outfit are relatively fixed, the stability and the safety in the puncture process are ensured, the puncture effect is prevented from being influenced due to the swing of the negative pressure sampler, after the puncture needle 16 punctures, the needle core 6 is punctured into a patient to collect a sample, then the fixed support assembly 1 is taken off, the negative pressure sampler can change the angle due to the soft texture of the first hose 5, the collection is carried out at a proper position, the operation flexibility is improved, the puncture outfit is prevented from being driven to deviate in the collection process, the injury to a patient is avoided, and the collection process is prevented from being influenced; collecting a sample by operating the negative pressure sampler; when the needle core 6 and the puncture needle 16 are pulled away, the medicament supplementing bag 12 supplements clean water or medicament to the patient, so that the condition that the air is generated at the patient to influence the detection of medical equipment is avoided.

Further optimization scheme, the puncture device includes a puncture housing 9 clamped at the lower end of the fixed support assembly 1, the stylet 6 penetrates through the puncture housing 9 from top to bottom, the top of the puncture housing 9 is provided with an air pressure balancing unit, the middle part of the puncture housing 9 is provided with an elastic positioning unit for limiting the stylet 6, the inner side bottom of the puncture housing 9 is vertically and slidably connected with a sealing guide block 26, the stylet 6 is vertically and slidably connected with the inner side center of the sealing guide block 26, the sealing guide block 26 is abutted to the elastic positioning unit, a gap is arranged between the stylet 6 and the inner side wall of the puncture needle 16, one end of the stylet 6 close to the first hose 5 is fixedly connected with a puncture handheld block 23, axial grooves 33 are correspondingly arranged on the outer side wall of the stylet 6 and the inner side wall of the puncture needle 16 respectively, the two axial grooves 33 form a relatively closed cavity channel (not marked in the figure), the cavity channel is communicated with the water bag 12, the two axial grooves 33 are respectively 3cm away from the sharp ends of the stylet 6 and the puncture needle 16, and the sharp end outer wall of the needle core 6 is in contact with the sharp end inner wall of the puncture needle 16.

Normal saline is arranged between the sealing guide block 26 and the bottom of the inner side of the puncture shell 9; the puncture handheld block 23 is held by hand to apply force to the needle core 6, so that the needle core 6 is punctured into the affected part, and the sample collection is convenient; the air pressure balancing unit is used for keeping the balance between the physiological saline at the bottom of the inner side of the puncture shell 9 and the air at the top in the process of collecting a sample, so that the physiological saline can be stably injected into the affected part at a constant speed; the injection speed of the normal saline can be adjusted through the air pressure balancing unit in the face of different diseased parts, and the operation efficiency is improved; the elastic positioning unit has the functions of ensuring that the needle core 6 is in a state of contacting the diseased part when the needle core 6 and the puncture needle 16 are punctured into the diseased part, preventing the needle core 6 from being punctured into the body of the patient in advance when the puncture needle 16 does not reach the diseased part, ensuring the sequence of the needle core 6 and the puncture needle 16 contacting the patient in sequence, and ensuring that the needle core 6 and the puncture needle 16 leave the diseased part simultaneously when the puncture needle 16 is pulled out; the sealing guide block 26 is used for injecting the physiological saline into the body of the patient by the extrusion of the elastic positioning unit when the puncture needle 16 is punctured into the affected part of the patient, so as to ensure that the punctured position is not infected; when the needle core 6 and the puncture needle 16 puncture pancreas to ensure that the needle core 6 punctures into the pancreas, when the axial relative movement distance of the two axial grooves 33 is more than 3cm, the cavity channel is communicated with the puncture position of the needle core 6, the elastic unit is pressed, and the physiological saline is injected to the puncture position of the needle core 6 through the sealing guide block 26, thereby preventing the surrounding environment from being infected in the puncture process and being beneficial to reducing the tissue damage; after the sample is collected and is ended, outwards take out from nook closing member 6, can form the air at the puncture position this moment, can cause the interference to medical detection equipment, influence detection precision, after two axial recess 33 axial reverse relative movement distance is greater than 6cm, inject clean water or medicament to 6 puncture positions of nook closing member through water pocket 12, avoid the production of puncture position air to avoid gaseous influential to ultrasonic imaging.

Further optimize the scheme, the atmospheric pressure balance unit is including seting up a plurality of first balancing holes 24 at puncture casing 9 top, a plurality of first balancing holes 24 circumference is equidistant to be seted up at puncture casing 9 top, a plurality of first balancing holes 24's internal diameter is arranged by big to little in proper order, puncture casing 9's outside top is rotated and is connected with pressure regulation carousel 8, second balancing hole 28 has been seted up to pressure regulation carousel 8's eccentric position, second balancing hole 28 corresponds the setting with arbitrary first balancing hole 24, and the internal diameter of second balancing hole 28 is not less than the internal diameter of first balancing hole 24, the center of pressure regulation carousel 8 is run through to the vertical direction of nook closing member 6.

Rotating the pressure regulating turntable 8 to enable the second balance holes 28 to correspond to the first balance holes 24 with different inner diameters, and when the pressure regulating turntable 8 corresponds to the first balance hole 24 with the largest inner diameter, the medicament injection speed is the largest; when the pressure regulating rotating disk 8 corresponds to the first balance hole 24 with the smallest inner diameter, the speed of injecting the medicament into the body is the smallest, and different injection speeds are selected for different diseased parts.

Further optimize the scheme, the elastic positioning unit includes that the symmetry sets up the briquetting 10 in puncture casing 9 both sides, two briquetting 10 are respectively along diameter direction sliding connection in the both sides wall of puncture casing 9, one side that two briquetting 10 are close to puncture casing 9 center is the one end of a pair of elastic push rod 25 of fixedly connected with respectively, the other end that two pairs of elastic push rod 25 are relative to be set up is fixedly connected with arc card 27 respectively, two arc card 27 and the central coincidence of nook closing member 6, and the vertical direction sliding connection of lateral wall and the lateral wall of nook closing member 6 that two arc card 27 are relative.

When the needle core 6 is punctured into pancreas through the hand-held block 23, the elastic push rod 25 is extruded and elastically deformed by pressing the two pressing blocks 10, so that the two arc-shaped clamping pieces 27 clamp the needle core 6, the needle core 6 is kept at the position, and the sealing guide block 26 is extruded by the bottoms of the two pressing blocks 10 while the two pressing blocks 10 are pressed, so that the sealing guide block 26 moves downwards, and then the extrusion medicament is injected into the body through a gap between the puncture needle 16 and the needle core 6; when the pressing block 10 is released, the pressure adjusting rotary disc 8 is rotated to make the second balance hole 28 not correspond to any first balance hole 24, so that the pressure balance of the upper side and the lower side of the sealing guide block 26 is ensured, the medicine injected into the body is generally trace, and the moving distance of the sealing guide block 26 is smaller.

In a further optimized scheme, the centers of the elastic push rods 25 are folded in half to form obtuse angles, and the two obtuse angles of the pair of elastic push rods 25 are arranged oppositely. The elastic push rod 25 is deformed outward when pressed.

Further optimize the scheme, negative pressure sampler includes the sample casing 2 of joint in the 1 upper end of fixed bolster assembly, the spacing end cover 17 of top fixedly connected with of sample casing 2, piston hole 19 has been seted up at spacing end cover 17's center, sliding connection has piston rod 3 in the piston hole 19, the one end that piston rod 3 is located the 2 inboards of sample casing rotates and is connected with rubber sealing plug 22, the vertical direction sliding connection of inside wall of rubber sealing plug 22 and sample casing 2, piston rod 3 is located and is set up spacing unit between the one end in the 2 outsides of sample casing and spacing end cover 17.

When needing to collect the sample, rebound piston rod 3, drive rubber sealing plug 22 and move up, form the negative pressure between the inboard bottom of messenger rubber sealing plug 22 and sample casing 2, collect the sample in the sick part to the inboard bottom of sample casing 2 through the negative pressure, in order to confirm the size of negative pressure at every turn, the outside fixed connection limit unit of piston rod 3, can accurately grasp the displacement of piston rod 3 at every turn through limit unit, and make its distance that keeps moving down, thereby confirm the size of negative pressure, can also continue to increase the negative pressure at any time, conveniently collect appropriate amount of sample.

Further optimize the scheme, spacing unit is including setting up the coil spring 21 in sample housing 2, coil spring 21 is located between the one end that piston rod 3 is close to rubber sealing plug 22 and the inside wall of sample housing 2, the one end fixed connection of coil spring 21 is on the inside wall of sample housing 2, the other end sliding connection of coil spring 21 is in the one end of piston rod 3, opening 18 has been seted up at the edge of piston hole 19, the top surface of spacing end cover 17 is close to 19 marginal fixedly connected with stopper 20 of piston hole, stopper 20 is the right angle setting with opening 18, a plurality of spacing archs 4 of fixedly connected with on the outside wall of piston rod 3, a plurality of spacing archs 4 are from last to the heliciform setting, the size of spacing archs 4 is not more than the size of opening 18, one of them spacing archs 4 simultaneously with the top surface of spacing end cover 17 and a side butt of stopper 20.

When the piston rod 3 is moved upwards, certain negative pressure can be generated, in order to accurately grasp the negative pressure value required each time, the piston rod 3 is rotated while the piston rod 3 is moved upwards, so that the limiting protrusion 4 firstly passes through the notch 18 in the vertical direction and then rotates to one side of the limiting block 20 away from the notch 18, and the distance of the upward movement of the piston rod 3 can be determined by the arrangement, namely the corresponding generated negative pressure is determined; the other end of the coil spring 21 slides in the vertical direction with the side wall of the piston rod 3 while the piston rod 3 moves upward, and when the piston rod 3 rotates, the other end of the coil spring 21 abuts against the side wall of the piston rod 3 in the circumferential direction, and the stopper 20 functions to prevent the stopper protrusion 4 from moving in the opposite direction by the reaction force of the coil spring 21.

Further optimize the scheme, fixed bolster assembly 1 includes support body 102, the first open stent 101 of top fixedly connected with of support body 102, the bottom fixedly connected with second open stent 103 of support body 102, the central line coincidence of first open stent 101 and second open stent 103, sample casing 2 joint is in the inboard of first open stent 101, puncture casing 9 joint is in the inboard of second open stent 103.

Further optimize the scheme, the limiting chuck 15 includes a fulcrum 30 located at the center of the limiting chuck 15, a first channel 29 and a second channel 31 are provided on the limiting chuck 15, the first channel 29 and the second channel 31 are located on two sides of the fulcrum 30 respectively, the opening degree of the second channel 31 is greater than that of the first channel 29, two clamping blocks 32 are fixedly connected to the edge of the limiting chuck 15, and the two clamping blocks 32 are located on two sides of the second channel 31 respectively.

The distance between the two sides of the first channel 29 far from the fulcrum 30 is increased by manually clamping the two clamping blocks 32, the center of the limiting chuck 15 is placed at the puncture needle 16, and the two clamping blocks 32 are released, so that the puncture needle 16 is clamped in the first channel 29.

In a further optimized scheme, the outlet end of the water bag 12 is connected with a one-way valve 13, and the opening pressure of the one-way valve 13 is greater than the working pressure of the negative pressure sampler. The backflow of clean water or medicament after being extruded out of the water bag 12 is avoided, and the extraction of the clean water or medicament in the water bag 12 when the needle core 6 extracts a sample is also avoided.

In a further optimized scheme, the limit chuck 15 and one end far away from the insertion end of the gastroscope insertion tube can be detachably connected in one mode of insertion and clamping.

In a further preferred embodiment, the tip of the puncture needle 16 is provided with a biofilm. When the puncture needle 16 and the needle core 6 are punctured, in order to prevent tissues or tissue fluid from entering the needle core 6, the tissues or the tissue fluid are blocked by a biological membrane; when the stylet 6 punctures outwards, the biomembrane is pushed open, and then the puncture is continued; the biomembrane material is Polycaprolactone (PCL) which can be degraded in a human body.

A use method of a medical pancreatic wet negative pressure puncture needle for tumor comprises the following steps:

the method comprises the following steps: before an operation is started, the negative pressure sampler and the puncture outfit are clamped on the fixed support assembly 1, so that the negative pressure sampler and the puncture outfit are relatively fixed, and the puncture outfit is prevented from being influenced by the position of the negative pressure sampler in the puncture process, namely the relative position of the negative pressure sampler and the puncture outfit needs to be arranged;

step two: operating the insertion end of the gastroscope insertion tube to the stomach of the patient, holding the negative pressure sampler, the puncture outfit and the fixed bracket assembly 1 by hand after finding the affected part, inserting the tip of the puncture needle 16 into the side wall of the stomach, and moving the puncture needle 16 downwards until the puncture needle 16 punctures the affected part; after the puncture depth of the puncture needle 16 is determined, the limiting chuck 15 is clamped at the outer side of the puncture needle 16 and detachably connected to one end far away from the insertion end of the gastroscope insertion tube, so that the puncture depth is kept, and the puncture depth is prevented from being influenced due to shaking of the puncture outfit; the mode of use of the gastroscope is the existing mode of use, and the detailed description is omitted. (ii) a

Step three: after the puncture depth of the puncture needle 16 is determined, the needle core 6 is pulled outwards at least 3cm, the cavity channel is communicated with the needle core 6, fingers press the two pressing blocks 10, physiological saline is filled into the front end of the needle core 6 while pressing the pressing blocks 10 to form a wet environment, then the needle core 6 is penetrated into a pancreatic gland block, the fixed support assembly 1 is taken down, and the negative pressure sampler can flexibly move and collect samples through the needle core 6 at a proper position due to the fact that the negative pressure sampler is communicated with the puncture device through the first hose 5; when the sample is collected, different negative pressures can be selected according to different diseased parts and different states of the extracted sample;

step four: before the pancreatic tumor is punctured, when the needle core 6 is pulled out, air is formed at the puncturing position, interference can be caused to medical detection equipment, and the observation of the position of the pancreatic tumor is influenced, so that when the needle core 6 is pulled out backwards, clean water or a medicament is injected to the puncturing position of the needle core 6 through the water sac 12, the generation of air at the puncturing position is avoided, and the influence of the air on ultrasonic imaging is avoided; the stylet 6 and the puncture needle 16 are punctured to the edge of the pancreatic mass, then the stylet 6 is pulled backwards, the water injection port 33 of the water sac is communicated with the stylet 6 and is injected with normal saline to fill the front end of the stylet 6, the stylet 6 is further punctured into the pancreatic mass, and a sample is intercepted through the stylet 6, wherein the sample is in a strip or liquid state;

step five: remove the medical pancreas wet-type negative pressure pjncture needle of tumour.

The working process of the embodiment is as follows:

in the initial state, the coil spring 21 is in a free state, the bottom of the pressing block 10 is abutted to the sealing guide block 26, and the negative pressure sampler and the puncture outfit are clamped on the fixed support assembly 1.

The negative pressure sampler and the puncture outfit are relatively fixed, so that the puncture outfit is prevented from being influenced by the position of the negative pressure sampler in the puncture process, namely the relative position of the negative pressure sampler and the puncture outfit needs to be arranged; holding the negative pressure sampler, the puncture outfit and the fixed support assembly 1 by hand, pressing the two pressing blocks 10 by fingers at the same time, moving the puncture needle 16 downwards until the puncture needle 16 punctures at a patient, and after the puncture depth of the puncture needle 16 is determined, detachably connecting the limiting chuck 15 at one end far away from the insertion end of the gastroscope insertion tube and clamping the limiting chuck on the outer side of the puncture needle 16 to keep the puncture depth and avoid the influence on the puncture depth caused by shaking the puncture outfit; during the puncture process, the needle core 6 is always kept inside the puncture needle 16 and can support the puncture needle 16; after the puncture depth of the puncture needle 16 is determined, the fixed support assembly 1 is taken down, and the negative pressure sampler and the puncture device are communicated through the first hose 5, so that the negative pressure sampler can flexibly move and collect samples at a proper position; at the moment, the needle core 6 is driven to puncture downwards and move into the pancreas, then the pressing block 10 is pressed, and the medicament is injected into the puncture position, so that the affected part is prevented from being infected, and meanwhile, the needle core 6 is convenient to puncture and sample; when the sample is collected, different negative pressures can be selected according to different diseased parts; when the needle core 6 is pulled away after the sample is collected, the water bag 12 is extruded while the needle core 6 is pulled away, and the clean water or the medicament in the water bag 12 is injected into the diseased part through the cavity channel, so that the phenomenon that the detection of the medical equipment is influenced by air generated when the needle core 6 is pulled away again is avoided; finally, remove the medical pancreas wet negative pressure pjncture needle of tumour.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The utility model provides a medical pancreas wet-type negative pressure pjncture needle of tumour which characterized in that: the negative pressure sampler comprises a fixed support assembly (1), wherein a negative pressure sampler is clamped at the upper end of the fixed support assembly (1), a puncture outfit is clamped at the lower end of the fixed support assembly (1), and the negative pressure sampler is communicated with the puncture outfit through a first hose (5); the center of the bottom of the outer side of the puncture outfit is communicated with a puncture needle (16), a needle core (6) with a cavity is arranged in the puncture needle (16) and the puncture outfit, one end of the needle core (6) close to the negative pressure sampler is communicated with the first hose (5), one side of the bottom of the puncture outfit is communicated with a water sac (12), a limiting chuck (15) used for limiting the puncture depth of the puncture needle (16) is clamped and connected to the outer side of one end of the puncture needle (16) close to the bottom of the puncture outfit, the puncture needle (16) is slidably connected to the inner side of the gastroscope insertion tube, and the limiting chuck (15) is detachably connected to one end far away from the insertion end of the gastroscope insertion tube;

the negative pressure sampler samples by utilizing a negative pressure principle and has the function of regulating negative pressure; the puncture needle (16) extends into the body through the inner side of the gastroscope insertion tube to reach the affected part directly, and samples are taken through the needle core (6).

2. The medical pancreas wet negative pressure puncture needle for tumor according to claim 1, which is characterized in that: the puncture ware includes that the joint is in puncture casing (9) of fixed bolster assembly (1) lower extreme, nook closing member (6) are from last to passing down puncture casing (9), the top of puncture casing (9) is provided with the atmospheric pressure balancing unit, the middle part of puncture casing (9) is provided with and is used for the restriction the elastically positioned unit of nook closing member (6), the vertical direction sliding connection in inboard bottom of puncture casing (9) has sealed guide block (26), just the vertical direction sliding connection of nook closing member (6) is in the inboard center of sealed guide block (26), sealed guide block (26) with the elastically positioned unit butt, nook closing member (6) with be provided with the clearance between the inside wall of pjncture needle (16).

3. The medical pancreatic wet negative pressure puncture needle for tumor according to claim 2, wherein: the atmospheric pressure balancing unit is including seting up a plurality of first balancing hole (24) at puncture casing (9) top, and is a plurality of first balancing hole (24) circumference is equidistant to be seted up puncture casing (9) top, and is a plurality of the internal diameter of first balancing hole (24) is arranged by big-end-down in proper order, the outside top of puncture casing (9) is rotated and is connected with pressure regulation carousel (8), second balancing hole (28) have been seted up to the eccentric position of pressure regulation carousel (8), second balancing hole (28) and arbitrary first balancing hole (24) correspond the setting, just the internal diameter of second balancing hole (28) is not less than the internal diameter of first balancing hole (24), the vertical direction of nook closing member (6) is run through the center of pressure regulation carousel (8).

4. The medical tumor pancreatic wet negative pressure puncture needle according to claim 3, wherein: the elastic positioning unit is in including the symmetry puncture casing (9) both sides press piece (10), two press piece (10) respectively along diameter direction sliding connection in the both sides wall of puncture casing (9), two press piece (10) to be close to one side at puncture casing (9) center is fixedly connected with the one end of a pair of elasticity push rod (25) respectively, two pairs the other end that elasticity push rod (25) set up relatively fixedly connected with arc card (27), two arc card (27) with the center coincidence of nook closing member (6), and two the lateral wall that arc card (27) is relative with the vertical direction sliding connection of lateral wall of nook closing member (6).

5. The medical pancreas wet negative pressure puncture needle for tumor according to claim 4, wherein: the center of the elastic push rod (25) is folded in half to form an obtuse angle, and the two obtuse angles of the pair of elastic push rods (25) are arranged oppositely.

6. The medical pancreatic wet negative pressure puncture needle for tumor according to claim 2, wherein: negative pressure sampler includes the joint and is in sample casing (2) of fixed bolster assembly (1) upper end, the spacing end cover of top fixedly connected with (17) of sample casing (2), piston hole (19) have been seted up at the center of spacing end cover (17), sliding connection has piston rod (3) in piston hole (19), piston rod (3) are located the one end of sample casing (2) inboard is rotated and is connected with rubber sealing plug (22), rubber sealing plug (22) with the vertical direction sliding connection of the inside wall of sample casing (2), piston rod (3) are located the one end in the sample casing (2) outside with be provided with spacing unit between spacing end cover (17).

7. The medical pancreas wet negative pressure puncture needle for tumor according to claim 6, which is characterized in that: the limiting unit comprises a coil spring (21) arranged in the sampling shell (2), the coil spring (21) is located between one end of the piston rod (3) close to the rubber sealing plug (22) and the inner side wall of the sampling shell (2), one end of the coil spring (21) is fixedly connected to the inner side wall of the sampling shell (2), the other end of the coil spring (21) is slidably connected to one end of the piston rod (3), an opening (18) is formed in the edge of the piston hole (19), the top surface of the limiting end cover (17) is close to a limiting block (20) fixedly connected to the edge of the piston hole (19), the limiting block (20) and the opening (18) are arranged in a right angle mode, a plurality of limiting protrusions (4) are fixedly connected to the outer side wall of the piston rod (3), the limiting protrusions (4) are arranged in a spiral mode from top to bottom, the size of the limiting protrusions (4) is not larger than that of the opening (18), and one of the limiting protrusions (4) abuts against the top surface of the limiting end cover (17) and one side surface of the limiting block (20).

8. The medical tumor pancreatic wet negative pressure puncture needle according to claim 6, wherein: the fixed support assembly (1) comprises a support body (102), a first opening support (101) is fixedly connected to the top end of the support body (102), a second opening support (103) is fixedly connected to the bottom end of the support body (102), the center line of the first opening support (101) coincides with the center line of the second opening support (103), the sampling shell (2) is connected to the inner side of the first opening support (101) in a clamped mode, and the puncturing shell (9) is connected to the inner side of the second opening support (103) in a clamped mode.

9. The medical pancreas wet negative pressure puncture needle for tumor according to claim 1, which is characterized in that: spacing chuck (15) are including being located fulcrum (30) at spacing chuck (15) center, first passageway (29) and second passageway (31) have been seted up on spacing chuck (15), first passageway (29) with second passageway (31) are located respectively the both sides of fulcrum (30), the aperture of second passageway (31) is greater than the aperture of first passageway (29), two grip blocks (32) of the marginal fixedly connected with of spacing chuck (15), two grip blocks (32) are located respectively the both sides of second passageway (31).