Double-channel biliopancreatic pressure measuring catheter

Abstract

The utility model provides a double-channel biliopancreatic pressure measuring catheter which comprises a catheter section I, a catheter section II, a catheter section III and a catheter section IV, a first guide wire channel is arranged in the catheter section I, the catheter section I is connected with the catheter section II, and a second guide wire channel and a first data transmission line channel are arranged in the catheter section II; the front end of the catheter section II is wrapped with a metal tube, the metal tube is provided with an open groove, and a pressure sensor is arranged in the open groove; the catheter section III and the catheter section IV are connected with the catheter section II, and a second data transmission line channel and a third guide wire channel are arranged in the catheter section III and the catheter section IV respectively; the tail of the catheter section III is provided with a pressure sensor connector, and the tail of the catheter section IV is provided with a guide wire connector. The pressure measuring device can be placed into duodenal papilla sphincter, common bile duct and pancreatic duct through a duodenoscope and a gastroscope forceps channel under the guide of a guide wire to measure the pressure in the duodenal papilla sphincter, the common bile duct and the pancreatic duct.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a double-channel bile and pancreatic pressure measuring catheter. Background Art

[0002] The bile duct is a closed lumen system composed of the liver, bile ducts, gallbladder, and sphincter of Oddi (SO). The rhythmic contractions of the SO, in coordination with the gallbladder, effectively control bile storage, concentration, and emptying, and prevent duodenal reflux. Changes in bile duct pressure reflect bile duct dynamics, and measuring bile duct pressure can be used to infer bile duct motility, particularly sphincter of Oddi dysfunction (SOD). In 1887, Oddi discovered the terminal sphincter of the common bile duct, performed the first manometric observations, and pioneered the study of biliary fluid dynamics. In 1974, Vondrasek et al. first used a microtransducer to assess common bile duct pressure and the pressure gradient from the common bile duct to the duodenum. In 1975, Nebel reported measuring bile duct pressure using an infusion catheter. In 1977, Arndorfer et al. improved the infusion system, replacing the water infusion method with low-compliance gas pressure capillary infusion. Professor Zou Shengquan of my country discovered in his early experiments studying biliary fluid mechanics and the causes of gallstones that there is a continuous hydrostatic pressure gradient in the bile duct, with the hepatobiliary duct pressure being 40.18±6.08kPa, the common bile duct pressure being 33.76±5.85kPa, the gallbladder pressure being 26.95±9.34kPa, and the pressure difference between the intrahepatic bile duct and the gallbladder being 13.23kPa.

[0003] Currently, bile and pancreatic pressure measurement primarily utilizes water perfusion. A pressure-measuring catheter with a side hole is inserted through a duodenoscope. Water flows out of the side hole at a constant, low rate (0.15–0.40 mL / min) through the water perfusion system. The resistance that the water must overcome during overflow is the local pressure. This pressure is transmitted through the water column to an external pressure transducer, where it is converted into an electrical signal. After processing by a recorder and a computer, the signal is graphically and numerically generated. Depending on the catheter type, pressure measurement can be categorized as: water-perfusion catheters, aspirable liquid-perfusion catheters, and cuff-type pressure-measuring catheters. Because water-perfusion pressure measurement measures indirect pressure, it has low accuracy, is complex to perform, and has a high incidence of postoperative complications. Consequently, it is rarely used in hospitals in China and has been a slow development.

[0004] Microsensor pressure measurement is a new direct pressure measurement method that has emerged in recent years abroad. It does not require a water perfusion system, is simpler to operate, and provides more accurate measurement data. This method uses a solid-state pressure measuring catheter, which is mainly used in urology to measure renal pelvic pressure during cystoscopy or percutaneous nephrolithotomy. Currently, it is mainly used in urology, and there are no solid-state pressure measuring catheters for the biliary and pancreatic systems. Because the outer diameter of solid-state pressure measuring catheters is generally 4Fr or 5Fr, they are in the shape of a wire with a thin outer diameter and soft tube wall. The pressure measuring catheter is easily bent and folded when passing through the duodenoscope channel, and may even cause the data cable to break. In addition, it is difficult for the pressure measuring catheter to pass through the papilla into the common bile duct or pancreatic duct. Utility Model Content

[0005] In response to the above technical problems, a dual-channel bile and pancreatic pressure measuring catheter is provided. The technical means adopted by the utility model are as follows:

[0006] A dual-channel bile and pancreatic pressure measurement catheter, comprising: a catheter segment I, a catheter segment II, a catheter segment III, and a catheter segment IV; a first guidewire channel is provided inside the catheter segment I, the tail end of the catheter segment I is connected to the head end of the catheter segment II; a second guidewire channel and a first data transmission line channel are provided inside the catheter segment II, and the second guidewire channel is connected to the first guidewire channel;

[0007] The front end of the catheter section II is wrapped with a metal tube, the metal tube is provided with a slot, and a pressure sensor is provided in the slot;

[0008] The head ends of the catheter segments III and IV are connected to the tail end of the catheter segment II, and the interiors of the catheter segments III and IV are respectively provided with a second data transmission line channel and a third guidewire channel, the third guidewire channel is connected to the second guidewire channel, and the second data transmission line channel is connected to the first data transmission line channel;

[0009] The first guidewire channel, the second guidewire channel and the third guidewire channel constitute a guidewire channel;

[0010] The tail of the catheter section III is provided with a pressure sensor interface, and the pressure sensor interface is used to connect to a pressure detector;

[0011] The tail of the catheter section IV is provided with a guidewire connector, and a guidewire is inserted into the guidewire channel through the guidewire connector.

[0012] Furthermore, the catheter section I is a single-channel tube.

[0013] Furthermore, the catheter section I has a conical structure.

[0014] Furthermore, the catheter section II is a double-channel tube.

[0015] Furthermore, the pressure sensor is fixed in the slot of the metal tube by means of soft glue, and there is a gap between the pressure sensor and the soft glue for communicating with air.

[0016] Furthermore, the conduit section III and the conduit section IV are arranged in a Y shape.

[0017] Furthermore, the conduit section III is a single-channel tube.

[0018] Furthermore, the conduit section IV is a single-channel tube.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. The catheter of the present invention is provided with a guidewire channel, which can be inserted into the duodenal sphincter, common bile duct and pancreatic duct under the guidance of a conventional 0.035-inch guidewire to measure the pressure in the duodenal sphincter, common bile duct and pancreatic duct.

[0021] 2. The outer diameter of the catheter of the present invention is 5 to 7 Fr, and the tip is tapered, making it easier to pass through the duodenal papillary sphincter and enter the common bile duct and pancreatic duct to measure pressure.

[0022] Based on the above reasons, the present invention can be widely promoted in the fields of medical treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 This is a schematic diagram of inserting a guide wire according to the present invention.

[0026] In the figure: 1. Catheter segment I; 11. First guidewire channel; 2. Catheter segment II; 21. Second guidewire channel; 22. First data transmission line channel; 23. Metal tube; 24. Pressure sensor; 3. Catheter segment III; 31. Second data transmission line channel; 32. Pressure sensor interface; 4. Catheter segment IV; 41. Third guidewire channel; 42. Guidewire connector; 5. Guidewire. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The utility model provides a dual-channel bile and pancreas pressure measuring catheter, which is divided into catheter section I1, catheter section II2, catheter section III3 and catheter section IV4. The tail end of catheter section I1 is connected to the head end of catheter section II2.

[0029] Catheter section I1 is a single-channel tube with a first guidewire channel 11 inside; catheter section II2 is a double-channel tube with a second guidewire channel 21 and a first data transmission line channel 22 connected to the first guidewire channel 11. The catheter section I1 has a conical structure, and the front end of the catheter section II2 is wrapped with a metal tube 23. The metal tube 23 is provided with a groove, and a pressure sensor 24 (using an existing pressure sensor) is provided in the groove. The pressure sensor 24 is fixed in the groove of the metal tube 23 outside the tube wall by soft glue, and there is a gap between the pressure sensor 24 and the soft glue for connecting to the air.

[0030] Catheter segments III3 and IV4 are Y-shaped, with the head ends of each connected to the tail end of catheter segment II2. Both segments III3 and IV4 are single-channel tubes, each equipped with a second data transmission line channel 31 and a third guidewire channel 41. The third guidewire channel 41 is connected to the second guidewire channel 21, and the second data transmission line channel 31 is connected to the first data transmission line channel 22. The first guidewire channel 11, the second guidewire channel 21, and the third guidewire channel 41 constitute the guidewire channel. The first data transmission line channel 22 and the second data transmission line channel 31 constitute the data transmission line channel.

[0031] A pressure sensor interface 32 is provided at the tail end of the catheter section III3 for connection to a pressure detector.

[0032] A guidewire connector 42 is provided at the tail of the catheter section IV4, through which the guidewire 5 can be inserted or locked.

[0033] The outer diameter of the catheter body is 5 to 7 Fr, the outer diameter of the head end opening is 4 Fr, the inner diameter of the guidewire channel is 1 mm, the inner diameter of the data transmission line channel is 0.5 mm, and the length is 3 to 4 m.

[0034] The utility model can be inserted into the duodenal sphincter, common bile duct and pancreatic duct through the duodenoscope and gastroscope forceps under the guidance of a guide wire to measure the pressure in the duodenal sphincter, common bile duct and pancreatic duct. The metal ring can locate the depth of catheter insertion.

[0035] The use method of this utility model:

[0036] (1) 2 days before surgery, it is forbidden to use drugs that affect the bile duct and SO, such as scopolamine butylbromide and nitroglycerin, and fast for 12 hours before surgery.

[0037] (2) Oral lidocaine or dyclonine jelly is administered as an oropharyngeal mucosal anesthetic before the operation. The body position is the same as that of ERCP, with the patient lying on the left side, biting the mouth, and receiving oxygen through a nasal cannula.

[0038] (3) The examination is performed by a skilled physician. After the duodenoscope is passed through the digestive tract, the duodenoscope is straightened to locate the main duodenal papilla.

[0039] (4) A sphincterotomy or angiographic catheter with a guide wire is inserted into the common bile duct or main pancreatic duct. After a small amount of contrast agent is injected to confirm that it is the bile duct or main pancreatic duct, the guide wire is left in place and the sphincterotomy or angiographic catheter is withdrawn.

[0040] (5) Insert the manometry catheter under the guidance of a guidewire and zero the manometry catheter at the level of the bile duct.

[0041] (6) The pressure measuring catheter is inserted into the upper duodenum of the common bile duct, and the pressure in the common bile duct is recorded after the pressure curve stabilizes.

[0042] (7) Pull back the pressure measuring catheter, withdrawing it 1-2 mm at a time, and measure the pressure at each point for 30-60 seconds. The high-pressure area seen when the catheter is pulled back is the SO base pressure. At the same time, the high-amplitude wave based on the high-pressure zone can be recorded, based on which the amplitude, interval, and propagation direction of the peristaltic wave can be calculated.

[0043] (8) Continue to pull the pressure measuring catheter backward. When the pressure measuring catheter enters the duodenum, the pressure in the duodenum can be recorded, and the pressure measurement is completed.

[0044] (9) The SO pressure measurement can be repeated if necessary.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-channel biliary and pancreatic pressure measurement catheter, characterized in that: include: Catheter segment I (1), catheter segment II (2), catheter segment III (3) and catheter segment IV (4), wherein a first guidewire channel (11) is provided inside the catheter segment I (1), the tail end of the catheter segment I (1) is connected to the head end of the catheter segment II (2), and a second guidewire channel (21) and a first data transmission line channel (22) are provided inside the catheter segment II (2), and the second guidewire channel (21) is connected to the first guidewire channel (11); The front end of the catheter section II (2) is wrapped with a metal tube (23), the metal tube (23) is provided with a slot, and a pressure sensor (24) is provided in the slot; The head ends of the catheter section III (3) and the catheter section IV (4) are both connected to the tail end of the catheter section II (2), and the interiors of the catheter section III (3) and the catheter section IV (4) are respectively provided with a second data transmission line channel (31) and a third guide wire channel (41), the third guide wire channel (41) is connected to the second guide wire channel (21), and the second data transmission line channel (31) is connected to the first data transmission line channel (22); The first guide wire channel (11), the second guide wire channel (21) and the third guide wire channel (41) constitute a guide wire channel; The tail of the catheter section III (3) is provided with a pressure sensor interface (32), and the pressure sensor interface (32) is used to connect to a pressure detector; The tail of the catheter section IV (4) is provided with a guide wire connector (42), and a guide wire (5) is inserted into the guide wire channel through the guide wire connector (42).

2. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The conduit section I (1) is a single-channel tube.

3. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The conduit section I (1) has a conical structure.

4. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The catheter section II (2) is a double-channel tube.

5. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The pressure sensor (24) is fixed in the slot of the metal tube (23) by means of soft glue, and a gap for communicating air is provided between the pressure sensor (24) and the soft glue.

6. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The conduit section III (3) and the conduit section IV (4) are arranged in a Y shape.

7. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The conduit section III (3) is a single-channel tube.

8. The dual-channel biliary and pancreatic pressure measurement catheter according to claim 1, characterized in that: The conduit section IV (4) is a single-channel tube.

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