CN211749751U - Tissue biopsy negative pressure 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 negative pressure cutting device for bile duct stenosis diseases, comprising an operating handle, a Luer connector, an outer tube, a transmission wire and a cutting device, wherein the outer tube and The operation handle is connected, a first cavity and a second cavity are arranged inside, 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 operation handle, and is divided into a first luer joint and a second luer joint. A luer connector, the first luer connector communicates with the first cavity for the guide wire to pass through; the second luer connector communicates with the second cavity; the cutting device is hollow, with a sharp end, and is detachably arranged on the transmission wire. The end; the second luer connector is connected to the negative pressure device. 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 volume is large, the sample will not be lost during the process of taking out, and the obtained sample has a high positive detection rate. It can be applied in clinical practice.

Description

A tissue biopsy negative pressure 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 negative pressure cutting device 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 of 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.

Although the utility model patent "Biopsy Forceps with a Guide Wire Channel" (201620656702.X) discloses a biopsy forceps with a guide wire channel, it can quickly and efficiently remove the pancreaticobiliary stent and can enter the pancreaticobiliary duct lesions for biopsy sampling. The inventor has conducted a comprehensive research on the device and found that it is sampled through the crocodile-shaped forceps head. 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 avoid the patient's biopsy In the process of sampling, if a large trauma occurs and a medical accident occurs, a small operation force must be ensured, then the crocodile-shaped forceps head cannot be fully contacted, resulting in insufficient scraped tissue, and multiple samplings are required to meet the requirements. 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 it is impossible to accurately judge and control the gap between the forceps head and the bile duct Due to the inclination angle and sampling force, the sampling process will cause huge trauma to the patient, and the instrument may even penetrate the bile duct, endangering the life of the patient.

In view of the above technical problems, the utility model discloses a tissue biopsy negative pressure cutting device for bile duct stricture diseases. Compared with the biopsy forceps disclosed in the prior art, the device has a precise sampling position and a large sampling volume. and less trauma to the patient.

SUMMARY OF THE INVENTION

A tissue biopsy negative pressure 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 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 The core rod 1 is slidable relative to the core rod 1, and the slider 2 seals the core rod 1; one end of the booster rod 3 is connected to the slider 2, and the other end is connected to the transmission wire 9; the outer tube 7 There is an external thread on it, and the outer tube 7 and the core rod 1 are connected through a thread seal; the outer tube 7 is connected with the operating handle, and there are two cavities inside, namely the first cavity 12 and the second cavity 13, 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, the first Luer connector 601 and the The first cavity 12 communicates with the guide wire; the second luer connector 602 communicates with the second cavity 13; the tissue biopsy negative pressure cutting device further includes a cutting device 8, which is hollow and detachable is arranged at the end of the transmission wire 9; the second luer connector 602 is connected to a negative pressure device, and the negative pressure device can be a needle tube or a negative pressure suction device, and the end of the second luer connector 602 is connected to the negative pressure suction device It is sealed and connected, and the air in the second cavity 13 is drawn out through the negative pressure suction device, so that a relative negative pressure state is formed in the second cavity 13, and the suction effect of the negative pressure makes the bile duct wall closer to the cutting device 8, and the cutting device 8 can be pushed. Realize cutting samples.

Preferably, the cutting device 8 is in the shape of a needle, the needle-shaped sampling device 8 has a sharp end and a small contact surface, and a negative pressure is applied during sampling, so that the bile duct wall is close to the cutting device 8, and the cutting device 8 is gently pushed. Sampling can be achieved with little damage to the bile duct wall. At the same time, the needle-shaped sampling device 8 has a large diameter and a large inner cavity, which can store more samples.

Preferably, the cutting device 8 is cylindrical, one end is detachably connected to the transmission wire 9, the other end is closed, and the side wall is provided with at least two barbs 10, the barbs 10 are connected to the inner cavity of the cutting device 8 In the same way, the sample tissue obtained by cutting the barb 10 is stored in the cutting device 8, and the closed cavity of the cutting device 8 can also prevent the loss of the sample tissue due to the movement of the cutting device 8, and the tip of the barb 10 can be hung. Sample tissue to prevent tissue loss, sub-sampling can cause harm to the patient.

Preferably, the cutting device 8 is made of metal, alloy, ceramic, rigid plastic or other materials that can realize the technical 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 materials that can realize the technical solution.

Preferably, the barbs 10 are made of stainless 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 barb 10 and the side wall of the cutting device 8 is 0-10°.

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

Preferably, the included angle between the barb 10 and the side wall of the cutting device 8 is 5°.

Preferably, the core rod 1 is provided with a scale, and the medical staff can push and pull the transmission wire 9 according to the scale to reduce the trauma to the patient.

Preferably, the 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 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 effects of the present invention are as follows: 1. When the needle-shaped cutting device 8 is used, after the medical staff pushes the sampling device to the designated position according to the position specified by the guide wire, the second luer connector 602 is connected to the negative pressure device, so that the second luer connector 602 is connected to the negative pressure device, so that the The cavity 13 forms a negative pressure state, and the suction of the negative pressure pushes the bile duct wall close to the cutting device 8, pushes the slider 2, makes the cutting device 8 contact the bile duct wall, and cuts the pathological tissue. At the same time, under the action of negative pressure, the removed tissue is stored in the cavity of the cutting device 8, and the sample will not be lost due to the movement or angle change of the cutting device 8; ② When using the cutting device 8 with barbs, the The sample tissue cut by the barb 10 is stored in the cutting device 8, and the closed cavity of the cutting device 8 can also prevent the sample tissue from being lost due to the movement of the cutting device 8, and the tip of the barb 10 can hang the sample tissue. To prevent tissue loss, subsampling can cause harm to the patient. The cutting device 8 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 cutting device 8 is large, and the sample will not be lost in the process of taking out. The positive detection rate of the sample is high, and it can be popularized and applied in clinical practice.

Description of drawings

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

1. Core rod; 2. Slider; 3. Booster rod; 5. Sheathing tube; 6. Luer connector; 601, First Luer connector; 602, Second Luer connector; 7. Outer tube; 8 , cutting device; 9, transmission wire

FIG. 2 is a front view of a tissue biopsy negative pressure cutting device 2 for bile duct stricture disease

1. Core rod; 2. Slider; 3. Booster rod; 5. Sheathing tube; 6. Luer connector; 601, First Luer connector; 602, Second Luer connector; 7. Outer tube; 8 , cutting device; 9, transmission wire; 10, barb;

Figure 3 is a partial cross-sectional view of a tissue biopsy negative pressure cutting device for bile duct stricture disease

1. Core rod; 2. Slider; 3. Booster rod; 601, First Luer connector; 602, Second Luer connector; 7, Outer tube; 9, Transmission wire; 12, First cavity; 13, second chamber

Figure 4 Cross-section of the outer tube 7

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

Figure 5 Shape of barb 10

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 negative pressure cutting device 1 for bile duct stricture disease

A tissue biopsy negative pressure 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 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 The core rod 1 is slidable 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 tube 7 and the core rod 1 are connected by threads, the outer tube 7 is connected with the operating handle, and there are two cavities inside, which are the first cavity 12 and the second cavity 13 respectively, and the transmission wire 9 is arranged in the second cavity 13 The described 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 communicates with the first cavity 12 for guiding The second luer connector 602 communicates with the second cavity 13; the tissue biopsy negative pressure cutting device further includes a cutting device 8, the cutting device 8 is hollow, the end is sharp, and is detachably arranged on the transmission wire The end of 9; the second luer connector 602 is connected to a negative pressure device, and the negative pressure device can be a needle tube, and the end of the second luer connector 602 is sealedly connected to the needle tube, and the second luer connector 602 is sealed and connected to the needle tube. The air in the cavity 13 forms a negative pressure state in the second cavity 13, and the negative pressure makes the bile duct wall closer to the cutting device 8, which is convenient for cutting enough tissue samples. The cutting device 8 is made of metal steel and is in the shape of a needle. The core rod 1 is provided with a scale, and the medical staff can push and pull the transmission wire 9 according to the scale, thereby reducing the trauma to the patient. One 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 tube 7 . The cross section of the outer tube 7 is circular.

Embodiment 2. A method of using a tissue biopsy negative pressure cutting device 1 for bile duct stricture diseases

(1) The medical staff first put the guide wire into the patient's biliopancreatic cavity, and then passed the guide wire along the first cavity 12 of the outer tube 7, and passed it out through the first Luer connector 601, then the outer tube 7 along the guide wire The silk enters the biliopancreatic cavity;

(2) According to the designated position of the guide wire, the tissue biopsy negative pressure cutting device 8 is placed at the site that needs to be sampled;

(3) The second luer connector 602 is connected to the negative pressure device, that is, the syringe, and the syringe is pulled to form a negative pressure state in the second cavity 13;

(4) Push the slider 2, and push the transmission wire 9 connected to the slider 2 out of the second cavity 13, then the cutting device 8 is exposed in the biliopancreatic cavity. After determining the tissue to be cut, the cutting device 8 sticks to the tissue , Push and pull the transmission wire 9 back and forth for many times, under the action of the pushing or pulling force, the cutting device 8 continuously cuts the tissue and stores it in the cutting device 8, and the scale provided on the core rod 1 can control the pushing distance and reduce trauma;

(5) After the sampling is completed, the negative pressure cutting device is pulled out and the obtained sample is processed.

Embodiment 3, a kind of tissue biopsy negative pressure cutting device 2 for bile duct stricture disease

A tissue biopsy negative pressure 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 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 The core rod 1 is slidable 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 tube 7 and the mandrel 1 are connected by threads. The core rod 1 is provided with a scale, and the medical staff can push and pull the transmission wire 9 according to the scale to reduce the trauma to the patient. The outer tube 7 is connected with the operating handle, and there are two cavities inside, which are the first cavity respectively. 12 and the second cavity 13, the transmission wire 9 is arranged in the second cavity 13; the luer connector 6 is arranged on the 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, the first luer connector 601 communicates with the first cavity 12 for the guide wire to pass through; the second luer connector 602 communicates with the second cavity 13; the tissue biopsy negative pressure cutting device also includes a cutting device 8, so The cutting device 8 is cylindrical, one end is detachably connected to the transmission wire 9, the other end is closed, and the side wall is integrally formed with barbs 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 angle between the barb 10 and the pipe wall of the cutting device 8 is 5°. 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 tube 7 . The cross section of the outer tube 7 is circular.

Embodiment 4. A method of using tissue biopsy negative pressure cutting device 2 for bile duct stricture disease

(1) The medical staff first put the guide wire into the patient's biliopancreatic cavity, and then passed the guide wire along the first cavity 12 of the outer tube 7, and passed it out through the first Luer connector 601, then the outer tube 7 along the guide wire The silk enters the biliopancreatic cavity;

(2) According to the designated position of the guide wire, the tissue biopsy negative pressure cutting device 8 is placed at the site that needs to be sampled;

(3) The second luer connector 602 is connected to the negative pressure device, that is, the syringe, and the syringe is pulled to form a negative pressure state in the second cavity 13;

(4) Push the slider 2, and push the transmission wire 9 connected to the slider 2 out of the second cavity 13, then the cutting device 8 is exposed in the biliopancreatic cavity. After determining the tissue to be cut, the cutting device 8 sticks to the tissue , Push and pull the transmission wire 9 several times before and after, the barbs 10 on the cutting device 8 are under the action of pushing or pulling force, and the tissue is continuously cut and stored in the cutting device 8. The scale provided on the core rod 1 can control the distance of the push , reduce trauma;

(5) After the sampling is completed, the negative pressure cutting device is pulled out and the obtained sample is processed.

Claims (10)

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.

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