Electrophysiological nasojejunal catheter

Abstract

The application discloses an electrophysiological nasointestinal catheter, which comprises a hose and a tube body arranged at the front end of the hose, the rear end of the hose is connected with a guide wire seat, a guide wire for tube placement is arranged in the hose, a camera is arranged at the corresponding port position of the tube body, a plurality of electrode pieces are uniformly embedded in the outer side wall of the tube body, a wire is embedded in the inner side wall of the hose, the wire is used for connecting the electrode pieces of the positive and negative poles, the wire extends along the hose to the guide wire seat and is used for connecting an electric stimulation device. The nasointestinal catheter has the functions of multi-channel intestinal electrophysiological monitoring, intestinal peristalsis wave monitoring, intestinal electric stimulation signal generation, intragastric pressure reduction and enteral nutrition infusion. The nasointestinal catheter breaks through the limitation of the millisecond pulse of the existing gastrointestinal stimulator, improves the accuracy of intestinal electrophysiology and intestinal peristalsis measurement, and provides convenience for testing or researching the effect of gastrointestinal bioelectricity in disease treatment and the effect of bioelectricity stimulation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, in particular to an electrophysiological naso-intestinal catheter. BACKGROUND

[0002] In the existing clinical diagnosis and treatment means, the incidence of functional gastrointestinal diseases accounts for more than 20% of digestive system diseases, and the influence of intestinal electrophysiology on functional gastrointestinal diseases is particularly prominent, and clinical medicine urgently needs effective monitoring of intestinal electrophysiological changes to provide guidance for subsequent treatment. Intestinal paralysis is a common gastrointestinal disease, and most of the existing market uses abdominal electrode patches for stimulation to promote intestinal peristalsis. However, the electrode patch is attached to the abdomen, so the effect of electrical stimulation is difficult to directly act on the intestine, and the effect is not obvious.

[0003] According to the existing electromagnetic navigation technology, the intestinal electrical stimulation can be performed through the form of in-vivo tube placement, and the paralysis of the intestine is prevented. The electromagnetic navigation technology includes a display device, a magnetic field device and an electromagnetic induction device. Through the external electromagnetic induction, an electromagnetic induction coil is installed at the front end of the nasogastric tube. Then the human body is placed horizontally, and the magnetic field device is placed beside the human body for inducting the electromagnetic coil. The display device is used to display the position of the electromagnetic induction coil. The nasogastric tube is supported by the lead wire, and the nasogastric tube is placed through the nasal cavity, passes through the esophagus and stomach to reach the intestine. Since the display device displays the position of the end of the nasogastric tube, the tube can be accurately placed, and the problem of long-term exposure of the human body to X-rays in traditional X-ray tube placement is solved.

[0004] Through the external electromagnetic induction positioning technology, the positioning induction coil installed at the front end of the catheter is used for accurate positioning. The electrode patch is installed at the front end of the catheter, and the intestinal stimulation is directly performed through the transmission of electrical signals, thereby effectively solving the problem of intestinal paralysis.

[0005] According to the existing research, the best electrical stimulation position for preventing intestinal paralysis is the position of the duodenal papilla. The electrophysiological catheter needs to pass through the cardia and pylorus to reach the specified stimulation site. In addition to electrical stimulation of the intestine, the electrophysiological catheter also needs to feed and administer drugs to the intestine to meet multiple functions. Therefore, the present application mainly aims at the phenomenon of intestinal paralysis, and there is no existing device for in-vivo stimulation for recovery. The external electrical stimulation solves the problem of the non-obvious effect of electrical stimulation of the intestine due to the isolation of the abdomen. SUMMARY

[0006] The present application aims to provide an electrophysiological naso-intestinal catheter, which mainly aims at the phenomenon of intestinal paralysis, and there is no existing device for in-vivo stimulation for recovery. The external electrical stimulation solves the problem of the non-obvious effect of electrical stimulation of the intestine due to the isolation of the abdomen.

[0007] To solve the above technical problems, the present application is realized by the following technical scheme:

[0008] An electrophysiological nasojejunal catheter comprises a hose and a tube body arranged at the front end of the hose, the rear end of the hose is connected with a guide wire seat, a guide wire for catheterization is arranged in the hose, a camera is arranged at the corresponding port position of the tube body, the head of the camera is detachably arranged at the port of the tube body, an electromagnetic induction wire group is fixed at the tail of the camera, and the electromagnetic induction wire group is fixed at the tail end of the guide wire;

[0009] A plurality of electrode pieces are uniformly embedded in the outer side wall of the tube body, the electrode pieces are uniformly arranged around the outer side wall of the tube body, adjacent electrode pieces are positive and negative, a wire is embedded in the inner side wall of the hose, the wire is used for connecting the electrode pieces of the positive and negative electrodes, and the wire extends along the hose to the guide wire seat and is used for connecting an electric stimulation device.

[0010] Further, a magnetic ring is fixed at the port of the tube body, the head of the camera has a magnetic head that can be magnetically adsorbed by the magnetic ring, the magnetic ring and the magnetic head are annular, the magnetic ring is buckled in the position of the port of the tube body, and the magnetic head surrounds the head of the camera.

[0011] Further, a flushing pipe is arranged on the inner side wall of the hose, the flushing pipe is arranged against the inner wall of the hose, the tube body is provided with a flushing hole communicating with the flushing pipe, one end of the flushing hole is arranged at the port side of the tube body, the other end of the flushing hole communicates with the flushing pipe, and the flushing pipe has a flushing branch pipe for flushing water at the position corresponding to the guide wire seat.

[0012] Further, a plurality of air cavities are uniformly arranged on the side wall of the tube body, the air cavities are covered with cover pieces, the cover pieces have the same arc shape as the outer side wall of the tube body, the electrode pieces are embedded on a single cover piece as a group of positive and negative electrodes, a first air bag is connected between the inner arc side of the cover piece and the side wall of the air cavity, an annular cavity is arranged in the tube body and communicates with each air cavity, an inflation pipe communicates between the annular cavity and the guide wire seat, the guide wire seat is provided with an inflation branch pipe connected with the inflation pipe, and the inflation pipe is arranged against the inner side wall of the hose.

[0013] Further, the air cavity opening side has a mounting groove accommodating the side of the cover piece.

[0014] Further, the side wall of the first air bag is corrugated.

[0015] Further, a coil is sleeved in the annular cavity, the coil is connected with the wire, and each electrode piece is connected with the coil.

[0016] Further, the hose has a second air bag at a position away from the tube body by a certain distance, a rubber sleeve is sleeved between the second air bag and the hose, the second air bag is a plurality of air bags and is uniformly arranged around the hose, the second air bags all communicate with the rubber sleeve, a layer is formed between the rubber sleeve and the outer side wall of the hose, and the hose is provided with a through hole communicating with the inflation pipe at the position corresponding to the layer.

[0017] Further, the hose has a pressure reduction hole at a position corresponding to the stomach, a pressure reduction channel communicating with the pressure reduction hole is arranged on the inner wall of the hose, and the pressure reduction channel has a pressure reduction branch pipe corresponding to the guide wire seat.

[0018] The application has the following beneficial effects: the electric physiological nasointestinal catheter disclosed by the application has the functions of multi-channel intestinal electric physiological monitoring, intestinal peristalsis wave monitoring, intestinal electric stimulation signal generation, gastric decompression and enteral nutrition infusion. The application breaks through the limitation of millisecond pulse of the existing gastrointestinal stimulator, improves the accuracy of intestinal electric physiology and intestinal peristalsis measurement, and provides convenience for testing or researching the effect of gastrointestinal bioelectricity in disease treatment and the effect of bioelectricity stimulation. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed for the embodiment description will be briefly introduced as follows, and other drawings can be obtained by those of ordinary skill in the art without creative labor on the basis of the drawings.

[0020] Figure 1 : Disassembly structure diagram of the tube body of the application.

[0021] Figure 2 : Assembly structure diagram of the tube body of the application.

[0022] Figure 3 : First air bag unfolding structure diagram of the tube body of the application.

[0023] Figure 4 : Second air bag unfolding structure diagram of the tube body of the application.

[0024] Figure 5 : Structure schematic diagram of the application.

[0025] In the drawings, the component list represented by each reference sign is as follows:

[0026] Tube body 1, hose 2, guide wire seat 6, guide wire 3, camera 32, electromagnetic induction wire group 31, electrode sheet 4, wire 5, magnetic ring 11, magnetic head 33, flushing pipe 21, flushing hole 15, guide wire seat 6, flushing branch pipe 61, air cavity 12, cover sheet 41, first air bag 42, annular cavity 13, inflation pipe 22, inflation branch pipe 62, mounting groove 14, coil 51, second air bag 7, rubber sleeve 71, decompression hole 23, decompression channel 24, decompression branch pipe 63. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application.

[0028] As Figures 1-5As shown: An electrophysiological nasoenteric catheter includes a flexible tube 2 and a tube body 1 placed at the front end of the flexible tube. The tube body functions similarly to a column head, and is made of rigid plastic for guiding the insertion of the catheter. A guidewire seat 6 is connected to the rear end of the flexible tube 2. A guidewire 3 for insertion is installed in the flexible tube 2. A camera 32 is installed at the corresponding port position of the tube body 1. The head of the camera 32 is detachably installed at the port of the tube body 1, and an electromagnetic induction wire group 31 is fixed to the tail of the camera 32. The electromagnetic induction wire group 31 is fixed to the end of the guidewire 3. An external magnetic field device is also provided to sense the electromagnetic induction wire group. The position of the electromagnetic induction wire group is displayed on a monitor. During insertion, electromagnetic navigation technology works in conjunction with the camera. The camera is detachably installed in the tube body. The tube body is supported by the guidewire and inserted into the nasal cavity of the patient. The flexible tube is guided through the esophagus, stomach, and finally reaches the intestine. Relying solely on electromagnetic navigation can only roughly show the position of the tube body in the patient's body. However, more precise positioning is required for intestinal electrophysiological testing. Therefore, external observation with a camera is used to achieve the goal of reaching the designated electrical stimulation site.

[0029] After catheterization, the guidewire and camera are removed. The cavity inside the catheter can be used for enteral feeding and drug administration. At the same time, the guidewire and camera assembly can be reused for the next catheterization, preserving high-value components and greatly saving costs.

[0030] Multiple electrode pads 4 are uniformly embedded in the outer wall of the tube body 1. The electrode pads 4 are evenly arranged around the outer wall of the tube body 1, with adjacent electrode pads representing positive and negative poles. A wire 5 is embedded in the inner wall of the flexible tube 2. The wire 5 connects the positive and negative electrode pads 4 and extends along the flexible tube to the guide wire seat 6, where it connects to the electrical stimulation device. In this invention, electrode pads with electrical stimulation on both sides are installed on the side wall of the tube body. When the tube body reaches the designated electrical stimulation site, electrical stimulation of the intestine is conducted through the wires, preventing intestinal paralysis and promoting intestinal peristalsis. This solves the problem of poor efficacy caused by the difficulty of directly targeting the intestine in traditional abdominal electrical stimulation.

[0031] like Figure 1 As shown: A magnetic ring 11 is fixed at the port of the tube 1. The head of the camera 32 has a magnetic head 33 that can be magnetically attracted by the magnetic ring. Both the magnetic ring 11 and the magnetic head 33 are annular. The magnetic ring 11 is inwardly aligned with the port of the tube 1, and the magnetic head 33 surrounds the head of the camera 32. During installation, the magnetic head and the magnetic ring are aligned and fixed under magnetic attraction. The tube is guided forward by a guide wire. The camera is advanced by the support of the magnetic head and the magnetic ring. When it reaches the designated position, the camera and electromagnetic induction wire assembly are pulled out by the guide wire. Due to the magnetic attraction of the magnetic head and the magnetic ring, the camera is less likely to be misaligned with the tube during the guide wire placement, preventing gastric fluid from entering the front of the tube and affecting the placement. At the same time, the fixation is not tight due to magnetic attraction, making it easy to remove the camera assembly by twisting the guide wire later.

[0032] like Figure 3 As shown: A flushing tube 21 is provided on the inner wall of the flexible tube 2, and the flushing tube 21 is set against the inner wall of the flexible tube 2. The tube body 1 has a flushing hole 15 that connects to the flushing tube. One end of the flushing hole 15 is located at the port side of the tube body 1, and the other end of the flushing hole 15 connects to the flushing tube 21. At the end of the flushing tube 21, corresponding to the guide wire seat 6, there is a flushing branch tube 61 for flushing. This is to address the problem of gastric fluid and other substances blurring the camera head during tube insertion, causing unclear vision. Water is sprayed through the flushing hole to clean the camera. At the same time, water can be flushed during tube insertion to lubricate the port of the tube body, facilitating tube insertion and reducing friction.

[0033] like Figure 3 As shown: Multiple air chambers 12 are evenly distributed on the sidewall of the tube body 1, each covered by a cover plate 41. The cover plate 41 has the same arc shape as the outer sidewall of the tube body 1. Electrode plates 4 are embedded in a single cover plate 41 with positive and negative electrodes in pairs. A first air bladder 42 connects the inner arc side of the cover plate 41 to the sidewall of the air chamber. An annular cavity 13 connecting each air chamber is formed inside the tube body 1. An inflation tube 22 connects the annular cavity 13 to the guidewire seat 6. The guidewire seat 6 is provided with an inflation branch tube 62 connecting to the inflation tube. The inflation tube 22 is attached to the inner sidewall of the flexible tube 2. Inflating each first air bladder through the inflation tube opens the cover plate, causing it to open in a quincunx pattern to adhere to the intestinal wall for support and fixation. During tube placement, the first air bladder is in a contracted state within the air chamber. When opened, it can fix the position of the tube body. Simultaneously, the electrode plates are installed on the cover plates, allowing them to fully contact the intestinal wall, resulting in direct electrical stimulation and a more pronounced effect. After the first air sac is inflated, there is a gap between them. This gap allows gastric juice and food residue to pass through without affecting the normal digestive process. The optimal number of air sacs is three.

[0034] like Figure 3 As shown: The air cavity 12 has a mounting groove 14 on the opening side to accommodate the side of the cover plate 41.

[0035] like Figure 3 As shown: The sidewalls of the first airbag 42 are corrugated. This allows it to contract easily, facilitating its opening at a certain angle.

[0036] like Figure 3 As shown: A coil 51 is sleeved in the annular cavity 13, and the coil 51 is connected to a wire 5. Each electrode plate 4 is connected to the coil 51. The electrode plates and the coil are connected in parallel by a wire. The wire is in a relaxed state and can be stretched. The wire is a copper wire with an insulating layer on its surface, similar to the winding assembly of an electric motor.

[0037] like Figure 4As shown: the position of the hose 2 away from the tube body has a second air bag 7, the second air bag 7 and the hose 2 between the sleeve joint has a rubber sleeve 71, the second air bag 7 is multiple, evenly arranged around the hose 2, the second air bag 7 is communicated with the rubber sleeve 71, the rubber sleeve 71 and the outer wall of the hose 2 form a sandwich, the hose 2 corresponding to the sandwich is provided with a through hole communicated with the inflation tube 22. The sandwich and the annular are communicated with the same inflation tube, which is used for inflating the first air bag and the second air bag at the same time during the inflation stage, and the air bag is inflated to play the role of the second point support, so that the position of the tube body is stable, and it is prevented from being affected by the intestinal peristalsis. Similarly, the second air bag is spaced apart, and a spacing for the solution to pass through is reserved, and the distance between the second air bag and the tube body is about 10-15 cm.

[0038] As shown: Figure 5 The hose 2 corresponding to the position of the stomach has a pressure relief hole 23, and the inner wall of the hose 2 is provided with a pressure relief channel 24 communicated with the pressure relief hole, and the pressure relief channel 24 corresponding to the guide wire seat 6 has a pressure relief branch pipe 63. For stomach cavity decompression, exhaust, prevent stomach bloating, etc.

[0039] The preferred embodiments of the above disclosed application are only used to help explain the application. The preferred embodiments do not describe all the details. Obviously, according to the content of the specification, many modifications and changes can be made. The description selects and describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application.

Claims

1. An electrophysiological nasojejunal catheter, characterized in that: it comprises a hose (2) and a tube body (1) disposed at the front end of the hose (2), the rear end of the hose (2) is connected with a guide wire seat (6), a guide wire (3) for tube placement is installed in the hose (2), a camera (32) is installed at the corresponding port position of the tube body (1), the head of the camera (32) is detachably installed at the port of the tube body (1), the tail of the camera (32) is fixed with an electromagnetic induction wire group (31), and the electromagnetic induction wire group (31) is fixed at the end of the guide wire (3); a plurality of electrode pads (4) are uniformly embedded on the outer side wall of the tube body (1), the electrode pads (4) are uniformly arranged around the outer side wall of the tube body (1), adjacent electrode pads (4) are positive and negative, a wire (5) is embedded on the inner side wall of the hose (2), the wire (5) is used to connect the positive and negative electrode pads (4), and the wire (5) extends along the hose to the guide wire seat (6) and is used to connect an electric stimulation device; a magnetic ring (11) is fixed at the port of the tube body (1), the head of the camera (32) has a magnetic head (33) that can be magnetically adsorbed by the magnetic ring, the magnetic ring (11) and the magnetic head (33) are annular, the magnetic ring (11) is buckled and fixed at the position of the port of the tube body (1), the magnetic head (33) surrounds the head of the camera (32), when installing, the magnetic head (33) is aligned with the magnetic ring (11), then when the tube body (1) is pushed forward under the guidance of the guide wire (3), the camera (32) is pushed forward by the support of the magnetic head (33) and the magnetic ring (11), and when reaching the specified position, the camera (32) and the electromagnetic induction wire group (31) are pulled out through the guide wire (3), the magnetic attraction force between the magnetic head (33) and the magnetic ring (11) makes the guide wire not easy to be misaligned with the tube body (1) when guiding the tube placement; a plurality of air cavities (12) are uniformly provided on the side wall of the tube body (1), the air cavities (12) are covered with cover pads (41), the cover pads (41) have the same arc shape as the outer side wall of the tube body (1), the electrode pads (4) are embedded on a single cover pad (41) as a group of positive and negative electrodes, a first air bag (42) is connected between the inner arc side of the cover pad (41) and the side wall of the air cavity, a ring-shaped cavity (13) that communicates with each air cavity is provided in the tube body (1), a gas filling pipe (22) that communicates between the ring-shaped cavity (13) and the guide wire seat (6) is provided, the guide wire seat (6) is provided with a gas filling branch pipe (62) that connects the gas filling pipe, and the gas filling pipe (22) is attached to the inner side wall of the hose (2); the gas filling pipe (22) is used to inflate each first air bag (42) to make each cover pad open and adhere to the inner wall of the intestine to play a supporting and fixing role; each first air bag (42) has a spacing after being opened to facilitate the passage of gastric juice and food residues; the hose (2) has a pressure reduction hole (23) corresponding to the position of the stomach, a pressure reduction channel (24) that communicates with the pressure reduction hole is provided on the inner wall of the hose (2), and the pressure reduction channel (24) has a pressure reduction branch pipe (63) corresponding to the guide wire seat (6). The inner side wall of the hose (2) is provided with a flushing pipe (21) which is arranged against the inner wall of the hose (2), the pipe body (1) is provided with a flushing hole (15) which communicates with the flushing pipe, one end of the flushing hole (15) is provided at the port side of the pipe body (1), the other end of the flushing hole (15) communicates with the flushing pipe (21), and the flushing pipe (21) has a flushing branch pipe (61) at the position corresponding to the guide wire seat (6) for flushing water; The hose (2) has a second air bag (7) at a position which is a certain distance away from the pipe body, a rubber sleeve (71) is sleeved between the second air bag (7) and the hose (2), the second air bag (7) is a plurality of air bags which are arranged uniformly around the hose (2), the second air bag (7) communicates with the rubber sleeve (71), the rubber sleeve (71) and the outer side wall of the hose (2) form a sandwich, the hose (2) is provided with a perforation which communicates with the inflation pipe (22) at the position corresponding to the sandwich, the sandwich and the annular cavity (13) both communicate with the same inflation pipe (22), which is used for inflating the first air bag (42) and the second air bag (7) at the same time at the inflation stage, and the second air bag (7) expands to play a second supporting role.

2. The electrophysiologic nasoenteric catheter of claim 1, wherein: The gas cavity (12) has a mounting groove (14) at the position corresponding to the edge side of the cover sheet (41).

3. The electrophysiologic nasoenteric catheter of claim 1, wherein: The side wall of the first air bag (42) is corrugated.

4. The electrophysiologic nasoenteric catheter of claim 1, wherein: The annular cavity (13) is sleeved with a coil (51), the coil (51) is connected with the lead wire (5), and each electrode sheet (4) is connected with the coil (51).

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