Downward stomach wall-biliopancreatic duct electric resection dilator of disposable endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to an electric resection dilator for drainage of a lower biliary tract, a pancreatic duct and a pseudocyst under the guidance of an ultrasonic endoscope, and solves the technical problems that when interventional ultrasonic endoscope treatment is carried out, the instruments need to be transferred to corresponding parts, however, most electric resection dilators are often large in pipe diameter, and in the treatment process, the dilator cannot be transferred to the corresponding parts. The risks of biliary fistula and pancreatic fistula are easily increased, and the situations that the stomach wall cannot be penetrated and the distance between the stomach wall and an endoscope is increased easily occur; according to the technical scheme, the stomach wall-biliopancreatic duct electric excision dilator under the disposable endoscope comprises a power source assembly, a control assembly, an injection assembly, a guide wire assembly, a supporting assembly and an electric excision assembly. Compared with a traditional electric resection dilator which is inconvenient to use and prone to causing operation risks, the electric resection dilator has the advantages that by means of the mode of integrating electric resection and physical dilation, instrument exchange can be quicker and smoother, operation time is effectively shortened, postoperative complications are reduced, and practical value of the dilator is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an electric cutting dilator for drainage of bile duct, pancreatic duct and pseudocyst under the guidance of ultrasonic endoscope. Background Art

[0002] At present, interventional treatment under ultrasound endoscopy is a hot topic of endoscopic technology at home and abroad. Endoscopic ultrasound-guided biliary drainage (EUS-BD) has now become an effective alternative for cases of ERCP failure. It has the advantages of being minimally invasive, safe, effective, and does not change the physiological drainage channel, and improves the quality of life of patients. Similarly, for pancreatic duct drainage guided by ultrasound endoscopy (EUS-PD), it has also become the first choice for remedial treatment after the failure of transpapillary pancreatography. If EUS-BD or EUS-PD is performed, it needs to be guided by ultrasound endoscopy. After the puncture needle pierces the gastric wall or duodenal wall to form a passage, certain means are taken to expand the sinus tract for subsequent exchange and deployment of surgical instruments. The current expansion tools include cystotomy knife, biliary dilation bougie, Soehend ra bile duct dilation catheter, small dilation balloon, cystotomy has the following two types: 6Fr, Endoflex, the disadvantage is: it has been discontinued; 10Fr, Cook, the instruction manual is suitable for pancreatic pseudocysts, its disadvantage is that the tube diameter is large, which can easily increase the risk of bile fistula and pancreatic fistula, the principle of bile duct dilation bougie is blunt separation, and the sinus tract between the gastric wall / duodenal wall and the bile duct and pancreatic duct is expanded in the non-electrocutical mode. The disadvantage is that it can easily fail to penetrate the gastric wall, push the gastric wall away from the endoscope, etc., resulting in an increased risk of surgical failure. The same is true for Soehendra bile duct dilation catheter and small diameter dilation balloon. In this case, to provide an instrument that is simple to operate and can effectively cauterize and dilate the sinus tract to address the above defects is an important research direction. Utility Model Content

[0003] In order to overcome the problems of most electrocautery dilators, the tube diameter is often set larger, which can easily increase the risk of bile fistula and pancreatic fistula during treatment. It is also easy to fail to penetrate the gastric wall, push the gastric wall further away from the endoscope, and increase the risk of surgical failure.

[0004] The technical solution of the present utility model is: a disposable endoscopic gastric wall-bile and pancreatic duct electrosurgical dilator, comprising a handle, a power supply assembly, a control assembly, an injection assembly, a guide wire assembly, a support assembly and an electrosurgical cutting assembly; a power supply assembly is provided at the tail end of the handle, a control assembly is provided at one end of the power supply assembly, an injection assembly is provided on the outside of the handle, the injection assembly is perpendicular to the outside of the handle, and the injection assembly and the front end of the handle are interconnected, a guide wire assembly is also provided on the outside of the handle, the guide wire assembly is inclined 30° to the handle, and the guide wire assembly and the injection assembly are interconnected, a support assembly is provided at the other end of the handle, the support assembly and the handle are interconnected, an electrosurgical cutting assembly is provided at one end of the support assembly, and the electrosurgical cutting assembly and the support assembly are interconnected.

[0005] Preferably, a handle is provided to fix the guidewire assembly, the guidewire assembly is used to deliver the guidewire into the bile duct, the handle is used to connect the power supply assembly, the power supply assembly is used to connect the control assembly, the control assembly is used to control the electrocuting assembly to perform electrocuting operations, the support assembly is used to support and fix the electrocuting assembly, the gastric wall and the bile and pancreatic duct are quickly cauterized by the electrocuting assembly, and then the support assembly is flexibly moved by the handle. At the same time, the contrast agent is injected into the bile duct using the injection assembly, thereby making the exchange of instruments faster and smoother, effectively shortening the operation time, reducing postoperative complications, and enhancing the practical value of the dilator.

[0006] Preferably, the power supply assembly includes a connecting electrode and a connecting wire; a connecting electrode is provided at the tail end of the handle, and a connecting wire is provided on one side of the connecting electrode; the operation of the electric cutting assembly is controlled by the connecting electrode, and the control assembly is connected by the connecting wire, thereby ensuring the normal use of the electric cutting assembly.

[0007] Preferably, the control component includes an electrosurgical device and a control button; the electrosurgical device is provided at one end of the connecting wire, and the control button is provided on one side of the electrosurgical device, and there are multiple groups of control buttons; the connecting electrodes are electrically controlled by the electrosurgical device, and the working state of the electrosurgical device is controlled by the control button.

[0008] Preferably, the injection assembly includes an injection tube, an injection cavity and a connecting cavity; an injection tube is provided on the outside of the handle, the injection tube is perpendicular to the outside of the handle, an injection cavity is provided inside the injection tube, a connecting cavity is provided at the front end inside the handle, and the connecting cavity and the injection cavity are interconnected; the injection position of liquid drugs such as contrast agents is clearly defined through the injection tube, and the caliber of the injection tube allows the connection of a syringe, the injection cavity is used to transport the contrast agent to the connecting cavity, and the contrast agent is transported to the bile duct through the connecting cavity.

[0009] Preferably, the guidewire assembly includes an introduction tube and an introduction cavity; an introduction tube is provided on the outside of the handle, the introduction tube is inclined 30° to the handle, and an introduction cavity is provided inside the introduction tube, and the introduction cavity and the injection cavity are interconnected; the guidewire introduction position is clearly defined through the introduction tube, and the guidewire is introduced into the support assembly using the introduction cavity, wherein the introduction cavity allows a 0.035-inch guidewire to pass through, thereby flexibly delivering the guidewire to the target site.

[0010] Preferably, the support assembly includes a catheter body and a metal ring; the catheter body is provided at one end of the handle, the catheter body and the communicating cavity are interconnected, and a metal ring is provided at one end of the catheter body; the metal ring is connected and fixed through the catheter body, and the electrocautery assembly is connected and fixed using the metal ring, wherein the outer diameter of the catheter body is 7Fr.

[0011] Preferably, the electrosurgical cutting assembly includes a conical catheter and an electrosurgical cutting ring; a conical catheter is provided at one end of the metal ring, the conical catheter and the catheter body are interconnected, and an electrosurgical cutting ring is provided at one end of the conical catheter, and the electrosurgical cutting ring and the connecting electrode are electrically connected to each other; the narrowed part is physically expanded by the conical catheter, and the gastric wall and bile duct wall of the target part are cut open by the electrosurgical cutting ring, wherein the outer diameter of the electrosurgical cutting ring is 6Fr, the outer diameter of the conical catheter transitions from 6Fr to 7Fr, and the total length of the conical catheter and the catheter body is 200mm, thereby ensuring effective operation within the 3.7mm biopsy channel.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with traditional electrocautery dilators, the tube diameter is often larger, which can easily increase the risk of bile fistula and pancreatic fistula during treatment. It is also easy to fail to penetrate the gastric wall, push the gastric wall away from the endoscope, and increase the risk of surgical failure. By integrating electrocautery and physical dilation, the instrument exchange can be faster and smoother, effectively shortening the operation time, reducing postoperative complications, and enhancing the practical value of the dilator.

[0014] 2. During dilation, under the guidance of the guidewire, the connecting electrode is energized to control the electrocautery ring to cauterize the gastric wall and bile and pancreatic duct. The metal ring is used to connect and fix the catheter body with an outer diameter of 6Fr. The catheter body with a total length of 200mm and the tapered catheter are slowly pushed in. The tapered catheter with an outer diameter transitioning from 6Fr to 7Fr is passed through the narrow area for physical dilation, thereby expanding the sinus tract to 7Fr. This solves the problem that most electrocautery dilators are inconvenient to use and easily lead to surgical risks, effectively reducing surgical risks.

[0015] 3. When inserting the guide wire, control the switch state of the electrosurgical equipment through the control button, use the connecting wire to connect the fixed connection electrode, control the electric cutting ring through the connecting electrode, inject the contrast agent into the injection cavity through the injection tube, and the contrast agent enters the connecting cavity through the injection cavity. Place the guide wire into the introduction tube so that the guide wire with a size of 0.035ich can be delivered to the target site through the introduction cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the disposable endoscopic gastric wall-bile and pancreatic duct electroresection and dilator of the present invention;

[0017] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the power supply component of the disposable endoscopic gastric wall-bile and pancreatic duct electroresection and dilator of the present invention;

[0018] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the injection component of the disposable endoscopic gastric wall-bile and pancreatic duct electroresection and dilator of the present invention;

[0019] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the electric cutting component of the disposable endoscopic gastric wall-bile and pancreatic duct electric cutting dilator of the present invention.

[0020] Explanation of the accompanying drawings: 1. Handle; 2. Power supply assembly; 3. Control assembly; 4. Injection assembly; 5. Guide wire assembly; 6. Support assembly; 7. Electrosurgical assembly; 201. Connecting electrode; 202. Connecting wire; 301. Electrosurgical device; 302. Control button; 401. Injection pipe; 402. Injection cavity; 403. Connecting cavity; 501. Introduction pipe; 502. Introduction cavity; 601. Catheter body; 602. Metal ring; 701. Conical catheter; 702. Electrosurgical ring. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See also Figure 1The utility model provides an embodiment: a disposable endoscopic gastric wall-bile and pancreatic duct electroresection dilator, comprising a handle 1, a power supply component 2, a control component 3, an injection component 4, a guide wire component 5, a support component 6 and an electroresection component 7; the power supply component 2 is provided at the tail end of the handle 1, and the control component 3 is provided at one end of the power supply component 2. The injection component 4 is provided on the outside of the handle 1, and the injection component 4 is perpendicular to the outside of the handle 1, and the injection component 4 and the front end of the handle 1 are interconnected. A guide wire component 5 is also provided on the outside of the handle 1, and the guide wire component 5 is inclined 30° to the handle 1, and the guide wire component 5 and the injection component 4 are interconnected. A support component 6 is provided at the other end of the handle 1, and the support component 6 and the handle 1 are interconnected. An electroresection component 7 is provided at one end of the support component 6, and the electroresection component 7 and the support component 6 are interconnected.

[0023] See also Figure 2-3 In this embodiment, the power supply assembly 2 includes a connecting electrode 201 and a connecting wire 202; the connecting electrode 201 is provided at the tail end of the handle 1, and a connecting wire 202 is provided on one side of the connecting electrode 201. The operation of the electrosurgical cutting assembly 7 is controlled by the connecting electrode 201, and the connecting wire 202 is used to connect to the control assembly 3, thereby ensuring the normal use of the electrosurgical cutting assembly 7; the control assembly 3 includes an electrosurgical device 301 and a control button 302; the electrosurgical device 301 is provided at one end of the connecting wire 202, and the control button 302 is provided on one side of the electrosurgical device 301. There are multiple groups of control buttons 302. The connecting electrode 201 is electrically controlled by the electrosurgical device 301, and the working state of the electrosurgical device 301 is controlled by the control button 302;

[0024] The injection assembly 4 includes an injection pipe 401, an injection cavity 402 and a connecting cavity 403; an injection pipe 401 is provided on the outside of the handle 1, the injection pipe 401 is perpendicular to the outside of the handle 1, an injection cavity 402 is provided inside the injection pipe 401, a connecting cavity 403 is provided at the front end of the handle 1, and the connecting cavity 403 and the injection cavity 402 are interconnected. The injection position of liquid drugs such as contrast agents is clearly defined through the injection pipe 401, and the diameter of the injection pipe 401 allows the connection of a syringe, and the contrast agent is transported to the connecting cavity 403 by using the injection cavity 402. The cavity 403 delivers the contrast agent into the bile duct; the guidewire assembly 5 includes an introduction tube 501 and an introduction cavity 502; the introduction tube 501 is provided on the outside of the handle 1, and the introduction tube 501 is inclined 30 degrees to the handle 1, and the introduction cavity 502 is provided inside the introduction tube 501. The introduction cavity 502 and the injection cavity 402 are interconnected. The guidewire introduction position is clearly defined through the introduction tube 501, and the guidewire is introduced into the support assembly 6 using the introduction cavity 502, wherein the introduction cavity 502 allows a 0.035-inch guidewire to pass through, thereby flexibly delivering the guidewire to the target site.

[0025] See also Figure 4In this embodiment, the support assembly 6 includes a catheter body 601 and a metal ring 602; the catheter body 601 is provided at one end of the handle 1, and the catheter body 601 and the communicating cavity 403 are mutually connected. The metal ring 602 is provided at one end of the catheter body 601, and the metal ring 602 is connected and fixed through the catheter body 601, and the metal ring 602 is used to connect and fix the electrosurgical assembly 7, wherein the outer diameter of the catheter body 601 is 7Fr; the electrosurgical assembly 7 includes a tapered catheter 701 and an electrosurgical ring 702; the tapered catheter 701 is provided at one end of the metal ring 602, The conical catheter 701 and the catheter body 601 are interconnected. An electrosurgical cutting ring 702 is provided at one end of the conical catheter 701. The electrosurgical cutting ring 702 is electrically connected to the connecting electrode 201. The conical catheter 701 is used to physically expand the narrowed area, and the electrosurgical cutting ring 702 is used to cut the target area of ​​the stomach wall and bile duct wall. The outer diameter of the electrosurgical cutting ring 702 is 6Fr, and the outer diameter of the conical catheter 701 transitions from 6Fr to 7Fr. The total length of the conical catheter 701 and the catheter body 601 is 200mm, thereby ensuring effective operation within the 3.7mm biopsy channel.

[0026] Before electrosurgical resection, insert the guide wire into the bile duct, remove the puncture needle, grasp the handle 1, follow the guide wire through the inner diameter working hole and insert the catheter body 601, and slowly push the catheter body 601 until the electrosurgical ring 702 fully contacts the stomach wall;

[0027] After confirming the electro-cutting site, the electro-surgery device 301 is turned on by the control button 302, and the connection wire 202 is connected to the fixed connection electrode 201, and the connection electrode 201 is used to control the electro-cutting ring 702 to cut the target site of the stomach wall and bile duct wall;

[0028] After the electrocautery is completed, the connecting electrode 201 is disconnected, and the metal ring 602 is used to connect and fix the catheter body 601 and the tapered catheter 701. The catheter body 601 and the tapered catheter 701 are slowly pushed in to physically expand the tapered catheter 701 through the stenosis, and the guide wire is removed.

[0029] When removing the dilator, the contrast agent is injected into the injection cavity 402 through the injection tube 401, and the contrast agent enters the connecting cavity 403 through the injection cavity 402, thereby allowing the contrast agent to enter the catheter body 601 and the tapered catheter 701. The target bile duct is observed again under X-ray fluoroscopy. After confirming that the dilation is successful, the guide wire is placed in the introduction tube 501 and sent to the target site through the introduction cavity 502. Finally, the guide wire is retained and removed from the dilator through the handle 1.

[0030] Through the above steps, the guide wire assembly 5 is fixed by setting the handle 1, the guide wire assembly 5 is used to send the guide wire into the bile duct, the power supply assembly 2 is connected through the handle 1, the power supply assembly 2 is connected to the control assembly 3, the control assembly 3 is used to control the electrocuting assembly 7 to perform electrocuting operations, the support assembly 6 is used to support and fix the electrocuting assembly 7, the gastric wall and the bile and pancreatic duct are quickly cauterized by the electrocuting assembly 7, and then, the support assembly 6 is flexibly moved by the handle 1, and at the same time, the contrast agent is injected into the bile duct using the injection assembly 4.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A disposable endoscopic gastric wall-bile and pancreatic duct electroresection dilator, comprising a handle (1); characterized in that: The invention also includes a power supply component (2), a control component (3), an injection component (4), a guide wire component (5), a support component (6) and an electric cutting component (7); the power supply component (2) is provided at the tail end of the handle (1), the control component (3) is provided at one end of the power supply component (2), the injection component (4) is provided on the outside of the handle (1), the injection component (4) is perpendicular to the outside of the handle (1), and the injection component (4) and the front end of the handle (1) are mutually connected, the guide wire component (5) is also provided on the outside of the handle (1), the guide wire component (5) is inclined at 30 degrees to the handle (1), and the guide wire component (5) and the injection component (4) are mutually connected, the other end of the handle (1) is provided with a support component (6), the support component (6) and the handle (1) are mutually connected, and the electric cutting component (7) is provided at one end of the support component (6), and the electric cutting component (7) and the support component (6) are mutually connected.

2. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 1, characterized in that: The power supply assembly (2) comprises a connecting electrode (201) and a connecting wire (202); the connecting electrode (201) is provided at the tail end of the handle (1), and a connecting wire (202) is provided on one side of the connecting electrode (201).

3. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 2, characterized in that: The control assembly (3) includes an electrosurgical device (301) and a control button (302); the electrosurgical device (301) is provided at one end of the connecting wire (202), and the control button (302) is provided at one side of the electrosurgical device (301), and the control button (302) is provided in multiple groups.

4. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 2, characterized in that: The injection assembly (4) comprises an injection pipe (401), an injection cavity (402) and a connecting cavity (403); the injection pipe (401) is arranged on the outside of the handle (1), the injection pipe (401) is perpendicular to the outside of the handle (1), the injection cavity (402) is arranged inside the injection pipe (401), and the connecting cavity (403) is opened at the front end of the handle (1), and the connecting cavity (403) and the injection cavity (402) are mutually connected.

5. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 4, characterized in that: The guide wire assembly (5) comprises an introduction pipe (501) and an introduction cavity (502); the introduction pipe (501) is arranged on the outside of the handle (1), the introduction pipe (501) is inclined at 30 degrees to the handle (1), the introduction cavity (502) is arranged inside the introduction pipe (501), and the introduction cavity (502) and the injection cavity (402) are interconnected.

6. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 4, characterized in that: The support assembly (6) includes a catheter body (601) and a metal ring (602); the catheter body (601) is provided at one end of the handle (1), the catheter body (601) and the communicating cavity (403) are interconnected, and the metal ring (602) is provided at one end of the catheter body (601).

7. The disposable endoscopic gastric wall-bile and pancreatic duct dilator according to claim 6, characterized in that: The electro-cutting assembly (7) comprises a conical catheter (701) and an electro-cutting ring (702); the conical catheter (701) is provided at one end of the metal ring (602), the conical catheter (701) and the catheter body (601) are interconnected, and the electro-cutting ring (702) is provided at one end of the conical catheter (701), and the electro-cutting ring (702) and the connecting electrode (201) are electrically connected to each other.

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