Bendable liquid injection biopsy forceps

Abstract

The utility model discloses a pair of bendable liquid injection biopsy forceps, which belongs to the technical field of medical instruments and comprises a core rod, a sliding ring is connected onto the core rod in a sliding manner, a connector is movably clamped on one side of the core rod, a fixing nut is connected to one side, far away from the core rod, of the connector, an outer tube is arranged on one side, close to the connector, of the core rod, and a pair of sampling forceps is mounted on the outer tube. A pre-bending part is arranged on the outer pipe, the connector and the fixing nut are both located on the surface of the outer pipe, the connector is communicated with the outer pipe, an inner pipe and an inhaul cable are installed on the sliding ring, the inhaul cable is located in the inner pipe, the inner pipe is located in the outer pipe, and the inhaul cable is in transmission connection with the sampling pliers; the outer tube of the forceps head part of the sampling forceps is pre-bent, so that the sampling forceps can be better inserted into the bile duct of a patient, cling to the inner wall of the bile duct, a contrast agent is injected into the connector, the contrast agent is fed into the bile duct from the outer tube and real-time contrast positioning is performed on an affected part during an operation, the sampling accuracy is conveniently improved, the operation difficulty is reduced, and the practicability of the device is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pair of bendable liquid-injection biopsy forceps. Background Art

[0002] Tumors often do not form clear masses in the early stages. Commonly used imaging techniques such as B-ultrasound, CT, and magnetic resonance imaging generally do not show obvious abnormalities in the detection of early tumors, which makes the detection of early tumors difficult. Contrast sampling of the affected area is required and cytological or pathological diagnosis is relied upon. Malignant bile duct tumors often grow longitudinally along the bile duct wall, and contrast sampling of tumors originating from the hilar bile duct is more difficult.

[0003] The traditional biopsy forceps used for ERCP-assisted biopsy are straight-tipped biopsy forceps. It is not easy to successfully cannulate the bile duct using this biopsy forceps, and the forceps tip in the bile duct is not easy to get close to the bile duct wall, resulting in poor quality of the obtained histological specimens. Therefore, a biopsy forceps with a bendable head and injection is proposed. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a flexible liquid injection biopsy forceps, in which the outer tube of the sampling forceps part is pre-bent to facilitate the device to better enter the duodenal papilla, and at the same time, contrast agent is injected to locate the sampling position in real time, which is beneficial to improve the convenience and accuracy of sampling.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: a flexible liquid injection biopsy forceps, comprising a core rod, a slip ring slidably connected to the core rod, a connector movably clamped on one side of the core rod, a fixing nut threadedly connected to the side of the connector away from the core rod, an outer tube coaxially fixedly installed on the side of the core rod close to the connector, the connector and the fixing nut are both located on the surface of the outer tube, the connector is connected to the outer tube, a sampling forceps is fixedly installed on one end of the outer tube away from the core rod, a pre-bent portion is provided on the outer tube, an inner tube and a cable are fixedly installed on the side of the slip ring close to the connector, the cable is located in the inner tube, the inner tube is located in the outer tube, the cable is fixedly connected to the sampling forceps, and the cable transmission connects the sampling forceps.

[0006] Preferably, a slide groove is formed through the middle of the core rod, the slip ring comprises a main body slidably connected to the core rod, a slider is fixedly installed in the main body, the slider is located in the slide groove, and the slider is slidably connected to the slide groove.

[0007] Preferably, a connecting block is provided on one side where the core rod is connected to the connector, a connecting hole is provided at the connection between the connector and the connecting block, and the connecting block is movably engaged with the connecting hole.

[0008] Preferably, the connector is provided with an infusion connector, and the infusion connector is connected to the outer tube.

[0009] Preferably, an integrally formed supporting ring is provided on a side of the core rod away from the connector.

[0010] Preferably, the inner tube is made of a single-lumen polymer material, and the outer tube is a spring outer tube.

[0011] Preferably, the outer diameter of the outer tube is less than 2.7 mm.

[0012] The working principle of the flexible injection biopsy forceps of the utility model is as follows: a pre-bent portion is provided on the outer tube at the sampling forceps position of the device, so that the sampling forceps can better enter the duodenal papilla position and fit with the inner wall of the bile duct, so that it is more convenient and safe to deliver the device for sampling, a connector is provided on the device, and an infusion connector is provided on the connector to be connected with the syringe of the contrast agent, and the contrast agent is delivered from the interlayer of the outer tube and the inner tube, and the contrast agent flows from the connection between the outer tube and the sampling forceps to the patient's bile duct, so that contrast can be performed during the operation, and the sampling is more convenient and accurate. The outer tube is set to be less than 2.7mm to ensure that it can enter the patient's body through the endoscopic forceps channel.

[0013] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0014] 1. The pre-bent head facilitates efficient insertion into the duodenal papilla during clinical ERPC surgery. Compared with the over-the-wire biopsy forceps, it is cheaper, effectively reduces surgical costs and improves the practicality of the device.

[0015] 2. Compared with traditional biopsy forceps, a contrast agent injection channel is added. During the sampling process, the sampling position can be located in real time, making sampling more accurate and convenient, further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a flexible liquid-injected biopsy forceps in an embodiment;

[0017] Figure 2 An exploded view of the overall structure of a flexible liquid-injected biopsy forceps in an embodiment;

[0018] Among them: 1. core rod; 11. slide groove; 12. support ring; 13. connection block; 2. slip ring; 21. main body; 22. slider; 3. connector; 31. connection hole; 32. infusion connector; 4. fixing nut; 5. outer tube; 51. pre-bent part; 6. sampling clamp; 7. inner tube; 8. cable. DETAILED DESCRIPTION

[0019] The following is attached to the instruction manual Figure 1-2 , the technical solution of the utility model is explained through specific embodiments.

[0020] Embodiment:

[0021] like Figure 1 As shown, the utility model provides a flexible liquid-injection biopsy forceps, including a core rod 1, a slip ring 2 is slidably connected to the core rod 1, a connector 3 is movably clamped at one end of the core rod 1, a fixing nut 4 is threadedly connected to the end of the connector 3 away from the core rod 1, an outer tube 5 is coaxially fixedly installed on the side of the core rod 1 close to the connector 3, the connector 3 and the fixing nut 4 are both located on the surface of the outer tube 5, the connector 3 is connected to the outer tube 5, and a sampling forceps 6 is fixedly installed at the end of the outer tube 5 away from the connector 3.

[0022] like Figure 2 As shown, an inner tube 7 and a cable 8 are fixedly installed on one side of the slip ring 2 close to the connector 3 . The cable 8 is located inside the inner tube 7 . The cable 8 is fixedly connected to the sampling clamp 6 . The cable 8 is connected to the sampling clamp 6 through transmission. The inner tube 7 is located inside the outer tube 5 .

[0023] A slide groove 11 is provided through the middle of the core rod 1, an integrally formed support ring 12 is provided on the side of the core rod 1 away from the connector 3, a connecting block 13 is provided on the side where the core rod 1 is connected to the connector 3, the slip ring 2 includes a main body 21 sleeved on the surface of the core rod 1, a slider 22 is fixedly installed in the main body 21, the slider 22 is located in the slide groove 11, the slider 22 is slidably connected to the slide groove 11, a connecting hole 31 is provided on the connector 3 that is movably engaged with the connecting block 13, an infusion connector 32 is provided on one side of the surface of the connector 3, the infusion connector 32 is connected to the outer tube 5, and a pre-bent portion 51 is provided on the outer tube 5.

[0024] The inner tube 7 is a single-lumen polymer, the outer tube 5 is a spring outer tube, and the outer diameter of the outer tube 5 is less than 2.7 mm.

[0025] Working steps: First, assemble the device. After assembly, connect the contrast agent syringe to the infusion connector 32. Hold the device with one hand, place the index finger and middle finger in the two rings on the main body 21, and place the thumb in the support ring 12. Insert one side of the sampling clamp 6 of the device from the patient's duodenal papilla to make the sampling clamp 6 fit the bile duct wall. Use the other hand to push the contrast agent syringe. The contrast agent enters the outer tube 5 from the infusion connector 32 and flows out from the side of the outer tube 5 close to the sampling clamp 6 to perform contrast on the patient's affected part. Move the sampling clamp 6 to make it close to the contrast marked part. The index finger and middle finger on the hand holding the device are closed and exerted toward the thumb side to pull the slip ring 2 to slide on the core rod 1. The slip ring 2 pulls the cable 8 to drive the sampling clamp 6 to close, and sample the contrast marked part. After sampling, move the device out and send the tissue on the sampling clamp 6 for inspection.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible liquid-injection biopsy forceps, comprising a core rod, characterized in that: A slip ring is slidably connected to the core rod, a connector is movably clamped on one side of the core rod, a fixing nut is threadedly connected to the side of the connector away from the core rod, an outer tube is coaxially fixedly installed on the side of the core rod close to the connector, the connector and the fixing nut are both located on the surface of the outer tube, the connector is communicated with the outer tube, a sampling clamp is fixedly installed on one end of the outer tube away from the core rod, a pre-bent portion is provided on the outer tube, an inner tube and a cable are fixedly installed on the side of the slip ring close to the connector, the cable is located in the inner tube, the inner tube is located in the outer tube, the cable is fixedly connected to the sampling clamp, and the cable is transmission-connected to the sampling clamp.

2. The flexible liquid-injected biopsy forceps according to claim 1, characterized in that: A sliding groove is formed through the middle of the core rod. The slip ring comprises a main body slidably connected to the core rod. A sliding block is fixedly installed in the main body. The sliding block is located in the sliding groove and is slidably connected to the sliding groove.

3. The flexible liquid-injection biopsy forceps according to claim 1, characterized in that: A connecting block is provided on one side where the core rod is connected to the connector, a connecting hole is provided at the connection between the connector and the connecting block, and the connecting block is movably connected with the connecting hole.

4. The flexible liquid-injection biopsy forceps according to claim 1, characterized in that: The connector is provided with an infusion connector, and the infusion connector is communicated with the outer tube.

5. The flexible liquid-injection biopsy forceps according to claim 1, characterized in that: An integrally formed supporting ring is provided on one side of the core rod away from the connector.

6. The flexible liquid-injected biopsy forceps according to claim 1, characterized in that: The inner tube is made of a single-lumen polymer material, and the outer tube is a spring outer tube.

7. The flexible liquid-injected biopsy forceps according to claim 1, characterized in that: The outer diameter of the outer tube is less than 2.7 mm.

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