STOMACH TUBE FOR PREVENTING ASPIRATION

Abstract

The present invention discloses a stomach tube for preventing aspiration, comprising: a control circuit, an air pump, a PH sensor and a stomach tube provided with an air sack, wherein the air pump is in communication with the air sack, the PH sensor is arranged on an inner wall of the stomach tube at a distance of 40 cm away from a foretooth, and the control circuit is connected to the air pump and the PH sensor, respectively. The stomach tube of the present invention uses the PH sensor and the pressure sensor to monitor the PH value of the esophagus and the pressure of the air sack in real time, so as to accurately detect the occurrence of stomach esophagus regurgitation each time in advance, thereby avoiding the possibility of aspiration caused by regurgitation and the recessive pneumonia caused thereby; meanwhile, the present invention adopts a real-time control manner to automatically start the expansion of the air sack, thereby avoiding the damage to the esophageal mucosa caused by the long-time compression of the air sack on the esophagus, and reducing the substernal discomfort of a user. As a stomach tube for preventing aspiration, the present invention can be widely applied to the field of medical instruments.

Claims

1. A stomach tube for preventing aspiration, characterized by comprising a control circuit, an air pump, a PH sensor and a stomach tube provided with an air sack, wherein the air pump is in communication with the air sack, the PH sensor is arranged on an inner wall of the stomach tube, and the control circuit is connected to the air pump and the PH sensor, respectively.

2. The stomach tube for preventing aspiration of claim 1, characterized in that the control circuit comprises a PH comparison module, wherein the PH sensor is connected to an input end of the PH comparison module, and an output end of the PH comparison module is connected to the air pump.

3. The stomach tube for preventing aspiration of claim 1, characterized in that the stomach tube is provided with an air channel including an air port, and the air port is in communication with the air sack.

4. The stomach tube for preventing aspiration of claim 3, characterized in that an air inlet in communication with the air pump is arranged at an upper end of the air channel.

5. The stomach tube for preventing aspiration of claim 3, characterized in that a plug is arranged at a lower end of the air channel.

6. The stomach tube for preventing aspiration of claim 1, characterized in that the stomach tube is provided with a sensor line, and the control circuit is connected to the PH sensor by the sensor line.

7. The stomach tube for preventing aspiration of claim 1, characterized in that the sensor line is externally provided with a protective layer.

8. The stomach tube for preventing aspiration of claim 1, characterized in that a sealing hoop is externally arranged at the joint of the air sack and the stomach tube, and a liner ring is arranged inside the stomach tube at the joint of the air sack and the stomach tube.

9. The stomach tube for preventing aspiration of claim 1, characterized in that the stomach tube is made of a polyester soft material.

10. The stomach tube for preventing aspiration of claim 1, characterized in that a pressure sensor is also arranged in the air sack, and the control circuit also comprises a pressure comparison module, wherein the pressure sensor is connected to an input end of the pressure comparison module, and an output end of the pressure comparison module is connected to the air pump.

11. The stomach tube for preventing aspiration of claim 1, wherein the PH sensor is arranged on an inner wall of the stomach tube at a distance of 40 cm away from a foretooth.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a block diagram of a structure of the present invention;

[0024] FIG. 2 is a schematic diagram of a structure of a stomach tube of the present invention; and

[0025] FIG. 3 is a schematic cross-sectional diagram of the structure of the stomach tube of the present invention.

[0026] In the figures: 1. air inlet; 2. stomach tube; 3. air channel; 4. nutrient solution channel; 5. sensor line; 6. air port; 7. stomach esophagus; 8. plug; 9. PH sensor; 10. sealing hoop; 11. air-sack tube; 12. air sack; 13. liner ring; 14. circuit interface.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Referring to FIG. 1, a stomach tube for preventing aspiration comprises a control circuit, an air pump, a PH sensor and a stomach tube provided with an air sack, wherein the air pump is in communication with the air sack, the PH sensor is arranged on an inner wall of the stomach tube at a distance of 40 cm away from a foretooth, and the control circuit is connected to the air pump and the PH sensor, respectively.

[0029] Further, as a preferred embodiment, the control circuit comprises a PH comparison module, wherein the PH sensor is connected to an input end of the PH comparison module, and an output end of the PH comparison module is connected to the air pump.

[0030] The PH sensor of the present invention is connected to the air pump by the control circuit, and the air pump is started in case the PH value is less than 4, to enable the air sack to expand so as to prevent stomach esophagus regurgitation. On this basis, a control system of the stomach tube for preventing aspiration can be developed using the control circuit. The system operates according to set control parameters. It detects and controls the operating state and operating parameters of an air source, provides the operating state of a stomach acid sensor, forms a closed loop, and adjusts the output pressure of the air pump according to the PH detection result of the sensor in accordance with the developed control algorithm, to enable the stomach tube for preventing aspiration to always operate in the optimum state.

[0031] Referring to FIG. 2, further, as a preferred embodiment, the stomach tube 2 is provided with an air channel 3 including an air port 6, and the air port 6 is in communication with the air sack 12.

[0032] Further, as a preferred embodiment, an air inlet 1 in communication with the air pump is arranged at an upper end of the air channel 3.

[0033] Further, as a preferred embodiment, a plug 8 is arranged at a lower end of the air channel 3.

[0034] Further, as a preferred embodiment, the stomach tube 2 is provided with a sensor line 5, and the control circuit is connected to the PH sensor 9 by a circuit interface 14 on an upper part of the

[0035] Further, as a preferred embodiment, the sensor line 5 is externally provided with a protective layer.

[0036] The sensor line 5 and the air channel 3 are arranged at both sides of the tube wall of the stomach tube 2, as shown in FIG. 3, and a nutrient solution channel 4 is formed in the middle of the stomach tube 3.

[0037] Further, as a preferred embodiment, a sealing hoop is externally arranged at the joint of the air sack 12 and the stomach tube 2, including an upper sealing hoop 10a and a lower sealing hoop 10b as shown in FIG. 2, and a liner ring 13 is arranged inside the stomach tube at the joint of the air sack 12 and the stomach tube 2 (the liner ring corresponding to the lower sealing hoop 10b is not shown in FIG. 2).

[0038] Further, as a preferred embodiment, the stomach tube is made of a polyester soft material. Referring to FIG. 2, further, as a preferred embodiment, a pressure sensor is also arranged in the air sack. The control circuit also comprises a pressure comparison module, wherein the pressure sensor is connected to an input end of the pressure comparison module, and an output end of the pressure comparison module is connected to the air pump.

[0039] The pressure sensor is also connected to the control circuit by the sensor line.

[0040] According to data collected by the pressure sensor, a negative feedback loop of the pressure of the air sack is formed in the control system, to further strengthen accurate control on the pressure of the air sack.

[0041] Referring to FIG. 2 and FIG. 3, the operating flow of the present invention is explained.

[0042] First, this stomach tube is inserted into the stomach esophagus of a patient while in use. The cross section of the stomach tube 2 is provided with three hole channels, wherein the large hole 4 in the middle is used as a nutrient solution channel for importing nutrient solution required for patient's life. In addition, there are two small holes, wherein the hole 3 is used as an air channel, the compressed air of the air pump can pass through the air inlet 1 and enter the air sack 12 through the air channel 3 and the air hole 6, so that the air sack expands, and the stomach esophagus 7 is blocked by the air-sack tube 11. The other hole 5 in the cross section of the stomach tube is used as a sensor line channel, the line of the PH sensor 9 at the lowermost end of the stomach tube reaches the upper end of the stomach tube through the hole 5, and then is connected to the external circuit by the circuit interface 14.

[0043] The air-sack tube 11 and the stomach tube are fixed by the liner ring 13 embedded in the inner wall of the stomach tube and the outermost sealing hook 10.

[0044] The stomach tube 2 is a flexible tube with three through holes, an air outlet 6 is required to be machined in the middle to enable the compressed air to enter the air sack 12; meanwhile, a plug 8 is required to be additionally mounted at the bottom of the stomach tube 2, thereby preventing the compressed air from entering the human stomach.

[0045] The PH sensor 9 at the middle and lower part of the stomach tube 2 is used for detecting the PH value of the stomach juice of a patient. When the PH value is less than 4, the sampling voltage value acquired by the PH sensor 9 will be less than a set value of the PH comparison module in the control circuit. Therefore, the PH comparison module will output a high level such that the control system starts the air pump. Then, the compressed air is guided in the air sack 12, and the air sack 12 expands to block the stomach tube, so as to achieve the purpose of preventing stomach esophagus regurgitation.

[0046] When the pressure sensor detects that the pressure reaches the set value, the sampling voltage value acquired thereby will be greater than the set value of the pressure comparison module in the control circuit. Therefore, the pressure comparison module will output a low level such that the control system controls the air pump to stop operating. When the pressure is less than the set value, the air pump is automatically started, and the sack automatically expands, thereby guaranteeing that the air pressure is constant or changes in accordance with set requirements.

[0047] The invention is described in detail in accordance with the preferred embodiments. However, this invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the invention. All such equivalent modifications or replacements should fall within the scope defined by the claims of the invention.