CN211749751U

CN211749751U - Tissue biopsy negative pressure cutting device for bile duct stenosis diseases

Info

Publication number: CN211749751U
Application number: CN201921734727.7U
Authority: CN
Inventors: 孟文勃; 达子健
Original assignee: First Hospital of Lanzhou University
Current assignee: First Hospital of Lanzhou University
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-10-27
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to the technical field of medical equipment, in particular to a negative pressure tissue biopsy cutting device for bile duct stenosis diseases, which comprises an operating handle, a luer connector, an outer tube, a transmission wire and a cutting device, wherein the outer tube is connected with the operating handle, a first cavity and a second cavity are arranged inside the outer tube, and the transmission wire is arranged in the second cavity; the luer joint is arranged at one end of the outer tube close to the operating handle and is divided into a first luer joint and a second luer joint, and the first luer joint is communicated with the first cavity and is used for a guide wire to pass through; the second luer connector is communicated with the second cavity; the cutting device is hollow, has a sharp tail end and is detachably arranged at the tail end of the transmission wire; the second luer connector is connected with a negative pressure device. The utility model discloses a location pathological tissue's that can be accurate position and surely get, surely get the process simple, little to the wound of tissue, the sample storage volume is big, and can not lose at the in-process sample that takes out, and the positive relevance rate of the sample that obtains is high, can popularize and apply clinically.

Description

Tissue biopsy negative pressure cutting device for bile duct stenosis diseases

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to tissue biopsy negative pressure surely gets device for bile duct stenosis disease.

Background

Biliary stricture is a common clinical disease and is caused by benign stricture or malignant tumor, the benign biliary stricture is caused by injury of bile duct or inflammatory change of bile duct, or scar constriction of bile duct cavity caused after biliary tract operation, and the malignant biliary stricture is mainly caused by tumor compression. The judgment of benign and malignant properties of biliary stricture is very important for the selection of a treatment mode of a patient and the prognosis of a disease, but clinical differential diagnosis is very difficult, particularly malignant biliary stricture, the patient belongs to middle and late stages when obvious clinical manifestations appear due to atypical early symptoms, the radical surgical resection rate and survival rate are low, and the prognosis is very poor.

Endoscopic Retrograde Cholangiopancreatography (ERCP) is an important means for diagnosing and treating diseases of the pancreatic-biliary system. The ERCP can display the complete appearance of the bile ducts inside and outside the liver, but the sensitivity, specificity and accuracy of the qualitative diagnosis of the bile duct stenosis are not high enough; ultrasonic (IDUS) in the bile duct cavity under the duodenoscope can directly carry out ultrasonic in the bile duct, is closer to pathological tissues, still belongs to imaging diagnosis and cannot obtain pathological bases.

At present, the histopathological examination methods of bile duct stenosis diseases mainly include cell brushing examination under ERCP, bile drainage cytology examination, biopsy forceps examination and the like. Cytology samples can only be obtained by cell brushing examination and bile drainage cytology examination under ERCP, the positive rate is low (only 20-30%), the accuracy is poor, and the clinical diagnosis is greatly limited; the biopsy forceps inspection is a method for entering a focus of a human body through an endoscope, sampling pathological tissues and then judging the state of an illness through detecting the pathological tissues, and has high accuracy, but the biopsy forceps inspection has large wound on a patient, the sampling amount of samples is small, and the sample tissues are possibly lost in the taking process, so that larger wound is caused. Other methods such as the high cost of the oral son-mother choledochoscope, time-consuming operation, fragile and easily damaged choledochoscope body, great trauma of percutaneous transhepatic biliary biopsy, difficult operation, biliary hemorrhage and perforation, easy tumor dissemination and other risks, which cause the clinical application to be limited. In the existing clinical treatment process, a biopsy sampling device which is accurate in sampling position, large in sampling amount and small in wound of a patient does not exist all the time.

Although the utility model discloses a biopsy forceps with a guide wire channel (201620656702.X), a biopsy forceps with a guide wire channel is disclosed, which can remove the bracket of the pancreas and bile duct rapidly and efficiently and can enter the biopsy sampling of the lesion of the pancreas and bile duct. The inventor conducts comprehensive research on the device and finds that the device samples through a crocodile-shaped forceps head, but the device has the following problems due to the long biliary tract and inconsistent strictures: 1. in order to avoid great trauma and medical accidents of a patient in the biopsy sampling process, small operation force is required to be ensured, so that the alligator-shaped forceps heads cannot be fully contacted, the scraped tissue amount is insufficient, multiple sampling is required to meet the requirement, and the injury of the patient is actually aggravated; 2. in order to ensure enough tissue scraping amount, the crocodile-shaped forceps head and the bile duct are required to be inclined at a large angle to sample, but the inclination angle and the sampling force between the forceps head and the bile duct cannot be accurately judged and controlled, so that a patient is greatly injured in the sampling process, and the instrument even penetrates through the bile duct, so that the life safety of the patient is endangered.

To the technical problem, the utility model discloses a biopsy negative pressure surely gets device for bile duct stenosis disease compares in the biopsy forceps disclosed among the prior art, device sample position accurate, the sample volume is big, and is little to patient's wound.

Disclosure of Invention

A negative pressure tissue biopsy cutting device for bile duct stenosis diseases comprises an operating handle, a Ruhr joint 6, an outer tube 7 and a transmission wire 9, wherein the operating handle consists of a core rod 1, a sliding block 2 and an auxiliary push rod 3, the core rod 1 is in a hollow rod shape, one end of the core rod is provided with internal threads, the other end of the core rod is provided with a handle ring, and the side wall of the core rod is provided with an opening; the push-aid rod 3 is arranged in the core rod 1, the slide block 2 is nested on the core rod 1 and can slide relative to the core rod 1, and the slide block 2 seals the core rod 1; one end of the push-aid rod 3 is connected to the slide block 2, and the other end is connected with a transmission wire 9; the outer pipe 7 is provided with external threads, and the outer pipe 7 is hermetically connected with the core rod 1 through threads; the outer tube 7 is connected with the operating handle, two cavities, namely a first cavity 12 and a second cavity 13, are arranged inside the outer tube, and the transmission wire 9 is arranged in the second cavity 13; the luer connector 6 is arranged at one end of the outer tube 7 close to the operating handle and is divided into a first luer connector 601 and a second luer connector 602, and the first luer connector 601 is communicated with the first cavity 12 for a guide wire to pass through; the second luer connector 602 is in communication with the second lumen 13; the negative pressure tissue biopsy cutting device also comprises a cutting device 8, wherein the cutting device 8 is hollow and is detachably arranged at the tail end of the transmission wire 9; the second luer connector 602 is connected with a negative pressure device, the negative pressure device can be a needle tube or a negative pressure aspirator, the tail end of the second luer connector 602 is hermetically connected with the negative pressure aspirator, air in the second cavity 13 is pumped out through the negative pressure aspirator, so that a relative negative pressure state is formed in the second cavity 13, the wall of the liner is closer to the cutting device 8 under the suction action of negative pressure, and the sample can be cut by pushing the cutting device 8.

Preferably, surely get device 8 be the syringe needle form, 8 terminal sharpness of sampling device of syringe needle form, the contact surface is little, adds the effect of negative pressure during the sample for the bile duct wall is pressed close to surely gets device 8, promotes gently and surely gets device 8 alright realize taking a sample, and is little to the injury of bile duct wall, simultaneously, the bore of sampling device 8 of syringe needle form is big, and the inner chamber is big, can store more samples.

Preferably, surely get device 8 and be cylindricly, one end detachable is connected with transmission silk 9, the other end seals, the lateral wall is equipped with two at least barbs 10, barb 10 with surely get 8 inner chambers of device and communicate with each other, surely get the sample tissue storage that obtains through barb 10 and cut and get in device 8, surely get the cavity that device 8 was sealed simultaneously and also can prevent to lose sample tissue because of surely getting 8's removal, and barb 10's most advanced can be hung sample tissue and prevent that the tissue from losing, carry out the secondary sampling and cause the injury to the patient.

Preferably, the cutting device 8 is made of metal, alloy, ceramic, rigid plastic or other materials that can implement the present solution. Hard materials are more conducive to cutting tissue.

Preferably, the cutting device 8 is made of stainless steel.

Preferably, the barbs 10 are made of metal, alloy or other material that will accomplish the present teachings.

Preferably, the barbs 10 are made of stainless steel.

Preferably, the direction of the barbs 10 can be the same as and/or opposite to the direction of pushing the cutting device 8, so that the biopsy tissue can be collected when the cutting device 8 is pushed or pulled, the operation times are reduced, the sampling amount is increased, and the harm to the patient is reduced.

Preferably, the cutting device 8 is provided with two barbs 10 in opposite directions to facilitate collection of the biopsy tissue.

Preferably, the barbs 10 are angled from 0 to 10 degrees with respect to the side walls of the cutting device 8.

Preferably, the barbs 10 are angled at an angle of 3-6 degrees to the side walls of the cutting device 8.

Preferably, the barbs 10 are angled at 5 ° to the side walls of the cutting device 8.

Preferably, the core rod 1 is provided with scales, and medical personnel can push and pull the transmission wire 9 according to the scales, so that the wound of a patient is reduced.

Preferably, one end of the outer tube 7 close to the operating handle is provided with a protecting sleeve 5, and the protecting sleeve 5 is sleeved on the outer tube 7.

Preferably, the cross section of the outer tube 7 is circular, oval or any other shape that can realize the technical solution.

The utility model has the advantages that: firstly, when the needle-shaped cutting device 8 is used, medical staff push the sampling device to a specified position according to the position specified by the guide wire, then the second luer connector 602 is connected with the negative pressure device, so that the second cavity 13 forms a negative pressure state, the wall of the bile duct is attached to the cutting device 8 under the suction action of the negative pressure, the sliding block 2 is pushed, the cutting device 8 is enabled to be in contact with the wall of the bile duct, and pathological tissues are cut. Meanwhile, under the action of negative pressure, the taken tissue enters the cavity of the cutting device 8 for storage, and a sample cannot be lost due to the movement or angle change of the cutting device 8; when the cutting device 8 with barbs is used, sample tissues obtained by cutting through the barbs 10 are stored in the cutting device 8, meanwhile, the sample tissues can be prevented from being lost due to the movement of the cutting device 8 due to the closed cavity of the cutting device 8, the tip ends of the barbs 10 can be hung on the sample tissues to prevent the tissues from being lost, and secondary sampling is performed to damage patients. The utility model discloses a surely get the position of device 8 location pathological tissue that can be accurate and surely get, surely get the process simple, and is little to the wound of tissue, surely get device 8's storage appearance volume big, and can not lose at the in-process sample that takes out, and the positive relevance rate of the sample that obtains is high, can popularize and apply clinically.

Drawings

FIG. 1 is a front view of a tissue biopsy negative pressure incision device 1 for biliary stricture diseases

1. A core bar; 2. a slider; 3. a push-aid rod; 5. sheathing a pipe; 6. a luer fitting; 601. a first luer fitting; 602. a second luer fitting; 7. an outer tube; 8. a cutting device; 9. transmission screw

FIG. 2 is a front view of a tissue biopsy negative pressure incision device 2 for biliary stricture diseases

1. A core bar; 2. a slider; 3. a push-aid rod; 5. sheathing a pipe; 6. a luer fitting; 601. a first luer fitting; 602. a second luer fitting; 7. an outer tube; 8. a cutting device; 9. a drive wire; 10. a barb;

FIG. 3 partial sectional view of a tissue biopsy negative pressure cutting device for bile duct stenosis disease

1. A core bar; 2. a slider; 3. a push-aid rod; 601. a first luer fitting; 602. a second luer fitting; 7. An outer tube; 9. a drive wire; 12. a first chamber; 13. second chamber

Cross section of the outer tube 7 in fig. 4

7. An outer tube; 8. a cutting device; 9. a drive wire; 12. a first chamber; 13. second chamber

Figure 5 barb 10 shape

Detailed Description

The technical solution of the present invention is described below with reference to specific embodiments, but the protection scope of the technical solution of the present invention is not limited to the following embodiments, and any person skilled in the art can simply modify, replace or deform the technical solution without changing the spirit of the technical solution of the present invention, and all belong to the protection scope of the technical solution of the present invention.

Example 1 tissue biopsy negative pressure incision device 1 for biliary stenosis disease

A negative pressure tissue biopsy cutting device for bile duct stenosis diseases comprises an operating handle, a Ruhr joint 6, an outer tube 7 and a transmission wire 9, wherein the operating handle consists of a core rod 1, a sliding block 2 and an auxiliary push rod 3, the core rod 1 is in a hollow rod shape, one end of the core rod is provided with internal threads, the other end of the core rod is provided with a handle ring, and the side wall of the core rod is provided with an opening; the push-assisted rod 3 is arranged inside the core rod 1, and the slide block 2 is nested on the core rod 1 and can slide relative to the core rod 1; one end of the boosting rod 3 is connected to the sliding block 2, and the other end of the boosting rod 3 is connected with the transmission wire 9; the outer tube 7 is provided with external threads, the outer tube 7 is connected with the core rod 1 through threads, the outer tube 7 is connected with an operating handle, two cavities, namely a first cavity 12 and a second cavity 13, are arranged inside the outer tube, and the transmission wire 9 is arranged in the second cavity 13; the luer connector 6 is arranged at one end of the outer tube 7 close to the operating handle and is divided into a first luer connector 601 and a second luer connector 602, and the first luer connector 601 is communicated with the first cavity 12 for a guide wire to pass through; the second luer connector 602 is in communication with the second lumen 13; the negative pressure tissue biopsy cutting device also comprises a cutting device 8, wherein the cutting device 8 is hollow, has a sharp tail end and is detachably arranged at the tail end of the transmission wire 9; the second luer connector 602 is connected with a negative pressure device, the negative pressure device can be a needle tube, the tail end of the second luer connector 602 is hermetically connected with the needle tube, air in the second cavity 13 is pumped out by drawing the needle tube, so that a negative pressure state is formed in the second cavity 13, the wall of the bile duct is closer to the cutting device 8 due to the negative pressure, and a sufficient tissue sample can be conveniently cut. The cutting device 8 is made of metal steel and is in a needle head shape. The core bar 1 is provided with scales, and medical personnel can push and pull the transmission wire 9 according to the scales, so that the wound to a patient is reduced. One end of the outer tube 7 close to the operating handle is provided with a protecting sleeve 5, and the protecting sleeve 5 is sleeved on the outer tube 7. The cross section of the outer tube 7 is circular.

Example 2 method of Using a tissue biopsy negative pressure incision device 1 for biliary stenosis

(1) Firstly, a medical worker puts a guide wire into a biliary-pancreatic tract of a patient, then the guide wire is inserted into a first cavity 12 of an outer tube 7 and is threaded out through a first luer connector 601, and then the outer tube 7 enters the biliary-pancreatic tract along the guide wire;

(2) according to the appointed position of the guide wire, the tissue biopsy negative pressure cutting device 8 is placed to the position needing sampling;

(3) the second luer connector 602 is connected with a negative pressure device, namely a needle cylinder, and the needle cylinder is pulled so that a negative pressure state is formed in the second cavity 13;

(4) the sliding block 2 is pushed, the transmission wire 9 connected with the sliding block 2 is pushed out of the second cavity 13, the cutting device 8 is exposed in the gallbladder-pancreas cavity, after the tissue to be cut is determined, the cutting device 8 is tightly attached to the tissue, the transmission wire 9 is pushed and pulled back and forth for multiple times, the cutting device 8 continuously cuts the tissue and stores the tissue in the cutting device 8 under the action of pushing force or pulling force, and the scale arranged on the core rod 1 can control the pushing distance and reduce the wound;

(5) after sampling, the negative pressure cutting device is drawn out and the obtained sample is processed.

Example 3 tissue biopsy negative pressure incision device 2 for biliary stenosis disease

A negative pressure tissue biopsy cutting device for bile duct stenosis diseases comprises an operating handle, a Ruhr joint 6, an outer tube 7 and a transmission wire 9, wherein the operating handle consists of a core rod 1, a sliding block 2 and an auxiliary push rod 3, the core rod 1 is in a hollow rod shape, one end of the core rod is provided with internal threads, the other end of the core rod is provided with a handle ring, and the side wall of the core rod is provided with an opening; the push-assisted rod 3 is arranged inside the core rod 1, and the slide block 2 is nested on the core rod 1 and can slide relative to the core rod 1; one end of the boosting rod 3 is connected to the sliding block 2, and the other end of the boosting rod 3 is connected with the transmission wire 9; the outer tube 7 is provided with external threads, and the outer tube 7 is connected with the core rod 1 through threads. The core rod 1 is provided with scales, medical staff can push and pull the transmission wire 9 according to the scales to reduce trauma to patients, the outer tube 7 is connected with the operating handle, two cavities, namely a first cavity 12 and a second cavity 13, are arranged inside the outer tube, and the transmission wire 9 is arranged in the second cavity 13; the luer connector 6 is arranged at one end of the outer tube 7 close to the operating handle and is divided into a first luer connector 601 and a second luer connector 602, and the first luer connector 601 is communicated with the first cavity 12 for a guide wire to pass through; the second luer connector 602 is in communication with the second lumen 13; biopsy negative pressure surely get device still including surely getting device 8, surely get device 8 be cylindricly, one end detachable is connected with transmission silk 9, the other end seals, lateral wall integrated into one piece is equipped with barb 10. The cutting device 8 is made of stainless steel and is provided with two barbs 10, and the directions of the two barbs 10 are opposite. The included angle between the barb 10 and the pipe wall of the cutting device 8 is 5 degrees. One end of the outer tube 7 close to the operating handle is provided with a protecting tube 5, and the protecting tube 5 is sleeved on the outer tube 7. The cross section of the outer tube 7 is circular.

Example 4 method of Using a tissue biopsy negative pressure dissection device 2 for biliary stenosis disease

(4) the slide block 2 is pushed, the transmission wire 9 connected with the slide block 2 is pushed out of the second cavity 13, the cutting device 8 is exposed in the gallbladder-pancreas cavity, after the tissue to be cut is determined, the cutting device 8 is tightly attached to the tissue, the transmission wire 9 is pushed and pulled back and forth for multiple times, the barb 10 on the cutting device 8 continuously cuts the tissue and stores the tissue in the cutting device 8 under the action of pushing force or pulling force, the scale arranged on the core rod 1 can control the pushing distance, and the wound is reduced;

Claims

1. A negative pressure tissue biopsy cutting device for bile duct stenosis diseases comprises an operating handle, a luer connector (6), an outer tube (7) and a transmission wire (9), wherein the outer tube (7) is connected with the operating handle, two cavities, namely a first cavity (12) and a second cavity (13), are arranged in the outer tube (7), and the transmission wire (9) is arranged in the second cavity (13); the luer connector (6) is arranged at one end of the outer tube (7) close to the operating handle and is divided into a first luer connector (601) and a second luer connector (602), and the first luer connector (601) is communicated with the first cavity (12) for a guide wire to pass through; a second luer (602) is communicated with the second cavity (13); the method is characterized in that:

the negative pressure tissue biopsy cutting device also comprises a cutting device (8), wherein the cutting device (8) is hollow and is arranged at the tail end of the transmission wire (9); the second luer connector (602) is connected with a negative pressure device.

2. The negative pressure tissue biopsy cutting device according to claim 1, wherein the cutting device (8) is needle-shaped and is detachably arranged at the tail end of the transmission wire (9).

3. The negative pressure tissue biopsy cutting device according to claim 1, wherein the cutting device (8) is cylindrical, one end of the cutting device is detachably connected with the transmission wire (9), the other end of the cutting device is closed, and the side wall of the cutting device is provided with at least two barbs (10).

4. The negative pressure tissue biopsy cutting device according to any one of claims 2 or 3, wherein the cutting device (8) is made of metal, alloy, ceramic or rigid plastic.

5. The negative pressure tissue biopsy cutting device according to claim 2 or 3, wherein: the operating handle consists of a core bar (1), a sliding block (2) and a boosting rod (3), the core bar (1) is in a hollow rod shape, one end of the core bar is provided with internal threads, the other end of the core bar is provided with a handle ring, and the side wall of the core bar is provided with an opening; the push-aid rod (3) is arranged inside the core rod (1), and the sliding block (2) is nested on the core rod (1) and can slide relative to the core rod (1); one end of the push-aid rod (3) is connected to the sliding block (2), and the other end of the push-aid rod (3) is connected with a transmission wire (9); the outer pipe (7) is provided with external threads, and the outer pipe (7) is connected with the core rod (1) through threads.

6. The negative pressure tissue biopsy cutting device of claim 3, wherein: the barbs (10) are made of metal or alloy, and the direction can be the same as and/or opposite to the direction pushed by the cutting device (8).

7. The negative pressure tissue biopsy cutting device of claim 6, wherein: the included angle between the barb (10) and the side wall of the cutting device (8) is 0-10 degrees.

8. The tissue biopsy negative pressure ablation device of claim 7, wherein: the included angle between the barb (10) and the side wall of the cutting device (8) is 3-6 degrees.

9. The negative pressure tissue biopsy cutting device of claim 5, wherein: one end of the outer pipe (7) close to the operating handle is provided with a protective sleeve (5), and the protective sleeve (5) is sleeved on the outer surface of the outer pipe (7).

10. The negative pressure tissue biopsy cutting device of claim 5, wherein: the cross section of the outer tube (7) is circular or elliptical.