Visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease

Abstract

The utility model discloses a visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease, and belongs to the technical field of medical instruments. Comprising a catheter body, a camera module is installed at the head end of the catheter body, a pH electrode is arranged on the catheter wall, close to the head end, of the catheter body, and a transmission cable is arranged in the catheter body in a penetrating mode and used for supplying power to the camera module and the pH electrode and transmitting data. The pH electrode comprises a pH reference electrode and a pH working electrode, and the pH reference electrode and the pH working electrode are fixed on the catheter wall of the catheter body in parallel. According to the utility model, synchronous observation of a pH curve and a reflux video can be obtained, the relationship between reflux and esophageal movement can be judged, and visual evidence is provided for kinetic research of gastroesophageal reflux.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a visualized pH catheter used for real-time reflux monitoring of gastroesophageal reflux disease. Background Art

[0002] Gastroesophageal reflux disease (GERD) is a common and frequent digestive system disease that has a serious impact on patients' daily life and work. Its pathogenesis is mainly due to gastric acid reflux into the esophagus, acid corrosion and damage to mucosal tissue. Therefore, monitoring esophageal acid reflux is the main method for diagnosing this disease.

[0003] At present, the diagnostic methods for gastroesophageal reflux include 24-hour impedance-pH monitoring and reflux evidence under direct gastroscopy. 24-hour impedance-pH catheter monitoring can dynamically identify reflux events and conduct analysis and evaluation, but it cannot observe the flow of reflux in real time; although gastroscopy can obtain visual reflux evidence such as mucosal damage, bile reflux infiltration, and relaxation of the cardia, it cannot provide long-term dynamic observation and cannot simultaneously determine the pH of the reflux. Utility Model Content

[0004] In response to the problems mentioned in the background technology, the utility model provides a visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease. Through the synchronous observation of the pH curve and the reflux video, the relationship between reflux, esophageal motility and mucosal damage is judged, providing more valuable evidence for the study of the mechanism of gastroesophageal reflux.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A visualized pH catheter for real-time reflux monitoring of gastroesophageal reflux disease comprises a catheter body, a camera module is installed at the head end of the catheter body, a pH electrode is arranged on the tube wall of the catheter body near the head end, and a transmission cable is passed through the catheter body, and the transmission cable is used to supply power to the camera module and the pH electrode and transmit data.

[0007] Furthermore, the pH electrode comprises a pH reference electrode and a pH working electrode, and the pH reference electrode and the pH working electrode are fixed in parallel on the tube wall of the catheter body.

[0008] Furthermore, the pH reference electrode is made of Ag / AgCl, and the pH working electrode is made of a hydrogen ion sensitive electrode.

[0009] Furthermore, the camera module includes a camera located in the center and light beads arranged around the camera, and the diameter of the camera module is not greater than 5 mm.

[0010] Furthermore, the catheter body is made of medical materials and has a length of 70-100 cm.

[0011] The beneficial effects of the utility model are:

[0012] It can obtain synchronous observation of pH curve and reflux video, determine the relationship between reflux and esophageal motility, and provide visual evidence for the dynamic study of gastroesophageal reflux; at the same time, it can monitor reflux events under visual conditions to ensure the accuracy of positioning and the integrity of reflux data; it combines the effects of 24-hour pH monitoring and electronic gastroscopy into one, which reduces the patient's pain and improves diagnostic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the pH catheter of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the camera module of the utility model;

[0015] Figure 3 This is a schematic diagram of the use state of the pH catheter of the utility model;

[0016] In the figure: 10 - catheter body; 11 - camera module; 110 - lamp bead; 111 - camera; 12 - pH reference electrode; 13 - pH working electrode; 14 - transmission cable; 20 - data output terminal. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] like Figure 1 As shown, the utility model provides a visualized pH catheter for real-time reflux monitoring of gastroesophageal reflux disease, comprising a catheter body 10, a camera module 11 and a pH electrode. The camera module 11 is installed at the head end of the catheter body 10, and the tail end of the catheter body 10 forms a data output end 20; the pH electrode is arranged on the tube wall of the head end of the catheter body 10.

[0019] like Figure 2 As shown, the camera module 11 includes a camera 111 located in the center and lamp beads 110 arranged around the camera 111. The camera module 11 is installed at the head end of the catheter body 10, and the diameter of the camera module 11 does not exceed 5 mm (OV9734 camera 111). The pH electrode includes a pH reference electrode 12 and a pH working electrode 13, and the pH reference electrode 12 and the pH working electrode 13 are sequentially installed on the side of the catheter body 10 near the camera module 11. The pH reference electrode 12 is made of Ag / AgCl, and the pH working electrode 13 is made of a hydrogen ion sensitive electrode, such as an antimony electrode.

[0020] The catheter body 10 is a flexible catheter made of medical materials, with a length of about 70-100 cm, and a transmission cable 14 passes through the inside. The transmission cable 14 includes an image transmission cable 14, a pH insulated wire and a power supply line, wherein one end of the image transmission cable 14 is electrically connected to the camera module 11; the pH reference electrode 12 and the pH working electrode 13 are each connected to a pH wire, and the image transmission cable 14 and the two pH electrode insulated wires pass through the entire catheter body 10 together. The data output terminal 20 is located at the tail end of the catheter body 10, and is composed of the signal output part of the image transmission cable 14 and the pH insulated wire, and the image and pH signal output are converted to the next step.

[0021] In addition to pH, sensors of various parameters can be embedded on the side of the catheter body 10 to obtain various physical and chemical data related to dynamic monitoring of gastroesophageal reflux and combine esophageal movement with the physical and chemical characteristics of reflux events. The monitored reflux data include but are not limited to the following parameters: impedance, pressure, temperature, bilirubin, etc.

[0022] The use and working process of the utility model are as follows: the subject sits, and after the nasal cavity is cleaned, the catheter is placed on the side with better ventilation. The surface anesthetic anesthetizes the nasal mucosa, and the pH catheter is gently inserted into the subject's nasal cavity. When the catheter touches the posterior pharyngeal wall, the subject is asked to lower his head and flex his neck so that the lower jaw is close to the chest wall, and then the tube is continued to be inserted. When the catheter approaches the throat, the patient is asked to swallow so that the catheter can pass through the upper esophageal sphincter with the help of the force of swallowing. Continue to insert the tube and place the pH electrode 5 cm away from the upper edge of the LES. The above process can be carried out under visual guidance, and the electrode is positioned under direct vision. The transmission cable 14 is connected to the signal collector and the host computer, and the data collected by the pH electrode and the camera module 11 are recorded by the host computer.

Claims

1. A visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease, characterized in that: The catheter body (1) comprises a catheter body (1), a camera module (11) being installed at the head end of the catheter body (1), a pH electrode being provided on the wall of the catheter body (1) close to the head end, and a transmission cable (14) being passed through the catheter body (1), the transmission cable (14) being used to supply power to the camera module (11) and the pH electrode and to transmit data.

2. The visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease according to claim 1, characterized in that: The pH electrode comprises a pH reference electrode (12) and a pH working electrode (13), and the pH reference electrode (12) and the pH working electrode (13) are fixed in parallel on the tube wall of the catheter body (1).

3. The visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease according to claim 2, characterized in that: The pH reference electrode (12) is made of Ag / AgCl, and the pH working electrode (13) is made of a hydrogen ion sensitive electrode.

4. The visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease according to claim 1, characterized in that: The camera module (11) comprises a camera (111) located at the center and lamp beads (110) arranged around the camera (111); the diameter of the camera module (11) is not greater than 5 mm.

5. The visual pH catheter for real-time reflux monitoring of gastroesophageal reflux disease according to claim 1, characterized in that: The catheter body (1) is made of medical material and has a length of 70-100 cm.

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