CN211749750U - Tissue biopsy cutting device for bile duct stenosis diseases - Google Patents

Abstract

The utility model relates to the technical field of medical devices, in particular to a tissue biopsy cutting device for bile duct stenosis diseases, comprising an operating handle, a Luer connector, an outer tube and a transmission wire. connection, the transmission wire is placed in the outer tube and the operating handle; the luer connector is arranged on one end of the outer tube side wall close to the operating handle; the tissue biopsy cutting device also includes a cutting device, and the cutting device is hollow The cylindrical shape is detachably arranged at the end of the transmission wire, and the side wall of the cutting device is provided with at least two barbs. The barb of the utility model can accurately locate the position of the pathological tissue and cut it, the cutting process is simple, the trauma to the tissue is small, the storage capacity of the metal tube is large, and the sample will not be lost in the process of taking out, and the obtained sample is positive. The yield is high, and it can be popularized and applied in clinical practice.

Description

A tissue biopsy cutting device for bile duct stricture disease

technical field

The utility model relates to the technical field of medical devices, in particular to a tissue biopsy cutting device used for bile duct stricture diseases.

Background technique

Biliary stricture is a common clinical disease, which is caused by benign stricture or malignant tumor. Benign bile duct stricture is caused by bile duct injury or bile duct inflammatory changes, or is caused by cicatricial narrowing of the bile duct lumen after biliary surgery. Malignant bile duct stricture is mainly caused by Caused by tumor compression. The judgment of the benign and malignant nature of biliary stricture is very important for the selection of treatment methods and the prognosis of the disease, but the clinical differential diagnosis is very difficult, especially for malignant biliary stricture. The surgical resection rate and survival rate are low, and the prognosis is very poor.

Endoscopic retrograde cholangiopancreatography (ERCP) is an important method for the diagnosis and treatment of pancreaticobiliary diseases. ERCP can display the whole picture of intrahepatic and extrahepatic bile ducts, but its sensitivity, specificity and accuracy are not high enough for the qualitative diagnosis of bile duct strictures. Duodenoscope intraluminal ultrasonography (IDUS) can perform ultrasound directly in the bile duct, which is closer to the lesions. tissue, but it still belongs to the imaging diagnosis and cannot obtain the pathological basis.

At present, the histopathological examination methods for bile duct stricture diseases mainly include cytological brushing under ERCP, bile drainage cytology and biopsy forceps examination. Cytological brushing and bile drainage cytology under ERCP can only obtain cytological samples, the positive rate is low (only 20-30%), the accuracy is poor, and it has great limitations for clinical diagnosis; biopsy forceps examination is performed by endoscopy It is a method in which the microscope enters the lesion of the human body, samples the lesion tissue, and then judges the disease condition by detecting the lesion tissue. Loss of sample tissue during removal causes more trauma. Other methods such as transoral choledochoscopy are expensive, time-consuming to operate, fragile and fragile, and percutaneous transhepatic biliary biopsy is invasive, difficult to operate, and has risks such as biliary bleeding and perforation, and easy tumor dissemination. Apps are restricted. In the existing clinical treatment process, there is no biopsy sampling device with accurate sampling position, large sampling volume, and less trauma to the patient.

The utility model patent "Biopsy Forceps with Guide Wire Channel" (201620656702.X) discloses a biopsy forceps with a guide wire channel, which can quickly and efficiently remove the pancreaticobiliary stent and can enter the pancreaticobiliary duct lesions for biopsy sampling. The device has undergone a comprehensive study and found that it is sampled through the crocodile-shaped forceps tip. However, due to the long bile duct and the inconsistent stenosis of each segment, the device also has the following problems: 1. In order to prevent patients from sampling during biopsy In case of a large trauma or a medical accident, a small operation force must be ensured, then the crocodile tooth-shaped forceps head cannot be fully contacted, resulting in insufficient amount of scraped tissue, requiring multiple samplings to meet the requirements, which actually leads to the patient The damage is aggravated; 2. In order to ensure a sufficient amount of scraped tissue, the crocodile-shaped forceps head and the bile duct must be inclined at a large angle to focus on sampling, but because the inclination angle between the forceps head and the bile duct cannot be accurately judged and controlled and sampling intensity, resulting in huge trauma to the patient during the sampling process, and the instrument may even penetrate the bile duct, endangering the life of the patient.

In view of the above technical problems, the present utility model discloses a tissue biopsy cutting device for bile duct stenosis diseases. Compared with the biopsy forceps disclosed in the prior art, the device has a precise sampling position, a large sampling volume, and has the advantages of The patient's trauma is small.

SUMMARY OF THE INVENTION

A tissue biopsy cutting device for bile duct stricture disease, comprising an operating handle, a luer connector 6, an outer tube 7 and a transmission wire 9, the operating handle is composed of a core rod 1, a slider 2 and a booster rod 3 , the core rod 1 is in the shape of a hollow rod, one end is provided with an internal thread, the other end is provided with a handle ring, and the side wall is provided with an opening; the booster rod 3 is arranged inside the core rod 1, and the slider 2 is nested in the core rod 1, it can slide relative to the core rod 1; one end of the booster rod 3 is connected to the slider 2, and the other end of the booster rod 3 is connected to the transmission wire 9; the outer tube 7 is hollow, and one end is connected to the operating handle, The transmission wire 9 is placed in the outer tube 7 and the operating handle; the luer connector 6 is arranged on one end of the side wall of the outer tube 7 close to the operating handle; the tissue biopsy cutting device also includes a cutting device 8, the cutting The device 8 is in the shape of a hollow cylinder and is detachably arranged at the end of the transmission wire 9. The side wall of the cutting device 8 is provided with at least two barbs 10, and the opening of the barbs 10 communicates with the interior of the cutting device 8. It is convenient to store the obtained sample tissue in the cutting device 8, so as to prevent the loss of the sample tissue due to the movement of the cutting device 8, and the tip of the barb 10 can hang the sample tissue to prevent the tissue from being lost. harm.

Preferably, the cutting device 8 is made of metal, ceramics, hard plastic or other materials that can realize the technical solution, and the barbs 10 are made of metal, alloy material or other materials that can realize the technical solution. , hard, sharp materials are more conducive to tissue sampling.

Preferably, the cutting device 8 and the barbs 10 are both made of metal steel.

Preferably, the direction of the barbs 10 can be the same and/or opposite to the direction in which the cutting device 8 is pushed, and the biopsy tissue can be collected when the cutting device 8 is pushed or pulled, reducing the number of operations, increasing the sampling volume, and reducing the need for patient care. s damage.

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

Preferably, the angle between the barbs 10 and the wall of the cutting device 8 is 0-10°, and the inclined angle is more conducive to the contact between the barbs 10 and the wall of the bile duct to collect biopsy tissue from the wall of the bile duct.

Preferably, the angle between the barb 10 and the wall of the cutting device 8 is 3-6°.

Preferably, the outer tube 7 is provided with external threads, the outer tube 7 and the core rod 1 are connected by threads, and the outer tube 7 is provided with two cavities, which are the first cavity 12 and the second cavity 13 respectively. , the transmission wire 9 is arranged in the second cavity 13, pushes the slider 2, drives the booster rod 3 and the transmission wire 9 to slide in the second cavity 13, the core rod 1 is provided with a scale, and the medical staff can adjust the scale according to the scale Adjust the position of slider 2.

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

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

The beneficial effect of the utility model is that: when the medical staff pushes the cutting device to the designated position according to the position designated by the guide wire, the cutting device 8 at the end of the transmission wire 9 is brought into contact with the pathological tissue by continuously pushing and pulling the slider 2, and the cutting device 8 is in contact with the pathological tissue. The barbs 10 on the side walls cut the pathological tissue, and continuously store the cut tissue inside the cutting device 8 to prevent the pathological tissue from being lost when the sampling device is taken out, and the tip of the barb 10 can hang the sample tissue to prevent tissue loss. , performing secondary sampling can cause harm to the patient. The utility model can accurately locate the position of the pathological tissue and cut it, the cutting process is simple, the trauma to the tissue is small, the sample storage volume is large, the sample will not be lost during the process of taking out, the positive detection rate of the obtained sample is high, and the application in clinical practice.

Description of drawings

Figure 1 is a front view of a tissue biopsy cutting device for bile duct stricture disease

1. Core rod; 2. Slider; 3. Booster rod; 5. Sheathing tube; 6. Luer connector; 7. Outer tube; 8. Cutting device; 9. Transmission wire; 10. Barb

Figure 2 is a cross-sectional view of a tissue biopsy cutting device for bile duct stricture disease

1. Core rod; 2. Slider; 3. Booster rod; 6. Luer connector; 7. Outer tube; 9. Transmission wire; 12. First cavity; 13. Second cavity

Figure 3 Different states of barb 10

Figure 4 Cross section 1 of outer tube 7

7. Outer tube; 8. Cutting device; 9. Transmission wire; 12. First cavity; 13. Second cavity

Figure 5 Cross section 2 of outer tube 7

7. Outer tube; 8. Cutting device; 9. Transmission wire;

Detailed ways

The technical solutions of the present utility model will be described below in conjunction with specific embodiments, but the protection scope of the technical solutions of the present utility model is not limited to the following examples. Simple modification, replacement or deformation of the technical solution all belong to the protection scope of the technical solution of the present invention.

Embodiment 1. A tissue biopsy cutting device for bile duct stricture disease

A tissue biopsy cutting device for bile duct stenosis disease, comprising an operating handle, a Luer connector 6, an outer tube 7 and a transmission wire 9, the outer tube 7 is empty inside, one end is connected with the operation handle, and the transmission wire 9 is placed. in the outer tube 7 and the operating handle; the luer connector 6 is arranged on one end of the side wall of the outer tube 7 close to the operating handle; the tissue biopsy cutting device also includes a cutting device 8, and the cutting device 8 is hollow Cylindrical, detachably arranged on the end of the transmission wire 9, the side wall of the cutting device 8 is provided with two barbs 10 in opposite directions, the cutting device 8 and the barbs 10 are both made of metal steel. To facilitate collection of biopsy tissue, the angle between the barbs 10 and the wall of the cutting device 8 is 5°, and the inclined angle is more conducive to the contact between the barbs 10 and the bile duct wall to collect biopsy tissue from the bile duct wall. The operating handle is composed of a core rod 1, a slider 2 and a booster rod 3. The core rod 1 is in the shape of a hollow rod, one end is provided with an internal thread, the other end is provided with a handle ring, and the side wall is provided with an opening; The booster rod 3 is arranged inside the core rod 1, the slider 2 is nested on the core rod 1, and can slide relative to the core rod 1; one end of the booster rod 3 is connected to the slider 2, and the other end of the booster rod 3 is connected The transmission wire 9; the outer tube 7 is provided with an external thread, the outer tube 7 and the core rod 1 are connected by threads, and the outer tube 7 is provided with two cavities, which are the first cavity 12 and the second cavity respectively. 13. The transmission wire 9 is arranged in the second cavity 13, pushes the slider 2, drives the booster rod 3 and the transmission wire 9 to slide in the second cavity 13, and the core rod 1 is provided with a scale. One end of the outer tube 7 close to the operating handle is provided with a sheath tube 5 , and the sheath tube 5 is sleeved on the outer surface of the outer tube 7 . The cross section of the outer tube 7 is circular.

Embodiment 2. A method of using a tissue biopsy cutting device for bile duct stricture disease

(1) During the operation, the medical staff first put the guide wire into the biliopancreatic cavity of the patient, then passed the guide wire along the first cavity 12 of the outer tube 7, and passed it out through the Luer connector 6, then the outer tube 7 Enter along the guide wire and reach the designated position of the biliopancreatic tract;

(2) push the slider 2, push the transmission wire 9 connected with the slider 2 out of the second cavity 13, then the cutting device 8 is exposed in the biliopancreatic cavity;

(3) Determine the tissue to be cut, push the slider 2 to make the cutting device 8 close to the tissue, the barbs 10 continuously cut the tissue and store it in the cutting device 8 under the action of pushing or pulling force, and after the sampling is completed, extract the tissue Biopsy cutting device and processing the obtained sample.

Claims (10)

1. A 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 hollow, one end of the outer tube is connected with the operating handle, and the transmission wire (9) is arranged in the outer tube (7) and the operating handle; the luer connector (6) is arranged at one end of the side wall of the outer tube (7) close to the operating handle; the method is characterized in that:

the biopsy cutting device further comprises a cutting device (8), the cutting device (8) is in a hollow cylindrical shape and is arranged at the tail end of the transmission wire (9), and at least two barbs (10) are arranged on the side wall of the cutting device (8).

2. The biopsy extraction device of claim 1, 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.

3. The biopsy extraction device of claim 1, wherein: the cutting device (8) is detachably arranged at the tail end of the transmission wire (9).

4. The biopsy extraction device of claim 3, wherein: the cutting device (8) is made of metal, alloy, ceramic or hard plastic, and the barbs (10) are made of metal or alloy material.

5. The biopsy cutting device according to any one of claims 1-4, wherein: the direction of the barbs (10) can be the same as and/or opposite to the direction of pushing by the cutting device (8).

6. The biopsy extraction device of claim 5, wherein: the included angle between the barb (10) and the pipe wall of the cutting device (8) is 0-10 degrees.

7. The biopsy extraction device of claim 6, wherein: the included angle between the barb (10) and the pipe wall of the cutting device (8) is 3-6 degrees.

8. The biopsy cutting device according to claim 2, wherein the outer tube (7) has two cavities inside, a first cavity (12) and a second cavity (13), and the driving wire (9) is disposed in the second cavity (13) to push the slider (2) and drive the push-aid rod (3) and the driving wire (9) to slide in the second cavity (13).

9. The biopsy extraction device of claim 8, wherein: the cross section of the outer tube (7) is circular or elliptical.

10. The biopsy extraction device of claim 8, wherein: one end of the outer tube (7) close to the operating handle is provided with a protective sleeve (5), and the protective sleeve (5) is sleeved on the outer tube (7).

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