A feeding tube capable of monitoring intragastric pressure in real time

Abstract

The utility model relates to medical instrument technical field, specifically disclose a kind of feeding tube that can real-time monitor intragastric pressure, including feeding tube body fixed through nose, and the extension of the one end connection of feeding tube body and set in the pressure monitoring assembly of the other end of feeding tube body;Pressure monitoring assembly includes the ring groove opened in the end of feeding tube body, installs the air bag on ring groove, set in the pressure change sensing pressure-sensitive diaphragm integrated component of air bag periphery, pressure-sensitive diaphragm integrated component includes with inner frame, outer frame, set in the support frame between inner frame and outer frame, the inner film pressure sensor of setting in inner frame inboard and the outer film pressure sensor of setting in outer frame outboard, the inner film pressure sensor is contacted with air bag, and the battery pack for independent power supply is installed between the inner frame and outer frame, the device solves the problem that the feeding tube with pressure sensor of traditional because pressure sensor external leads to pressure detection misalignment.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and specifically discloses a feeding tube that can monitor gastric pressure in real time. Background Technology

[0002] A nasogastric feeding tube is a tube inserted into the stomach through the nasal cavity to provide nutrition to patients who require feeding assistance. This tube is typically a soft plastic tube that is inserted into the esophagus through the nostril and then into the stomach. Nasogastric feeding tubes are commonly used when patients are unable to take oral food or are unable to obtain sufficient nutrition, delivering nutrients directly to the stomach through the tube to maintain the patient's nutritional needs. Additionally, nasogastric feeding tubes can also be used before and after surgery or in other situations where oral intake needs to be temporarily suspended to provide nutrition to patients. Currently, traditional enteral nutrition relies on manual intermittent aspiration of gastric residual volume (GRV) to assess gastric emptying capacity. This procedure is cumbersome and may increase the risk of aspiration. Furthermore, changes in gastric pressure cannot be monitored in real time, and the feeding rate adjustment is delayed, which can easily lead to gastric retention, reflux, or underfeeding. Generally speaking, the higher the gastric pressure, the more likely it is to indicate gastric retention, and vice versa. In clinical practice, feeding pumps are usually used in conjunction with feeding tubes. Currently, feeding pumps only support timed and metered infusion, which means that the following situations may occur: due to differences in the digestive capacity of different patients, timed and metered infusion using a feeding pump may result in gastric retention or insufficient feeding. Chinese patent application CN107374978A discloses a pressure-measuring gastric tube, comprising a tube body with a pointed soft tip at the tail end and a side hole at the tail end, a connector at the head end, a pressure sensor on the tube body, a signal line connected to the side of the pressure sensor, and a pressure measuring connector at one end of the signal line. The advantages of this invention compared to existing technologies are: the pressure-measuring gastric tube uses a miniature high-precision pressure sensor, characterized by fast response, small error, anti-interference, safety, and low invasiveness, enabling rapid, accurate, and real-time observation of changes in intragastric pressure; the pressure-measuring gastric tube is designed for single use, effectively avoiding the risk of accidental infection from cross-use. The tube described above uses a pressure sensor to monitor changes in intragastric pressure in real time. The following problems currently exist: 1. The high-precision pressure sensor is not built-in, and the accuracy cannot be guaranteed due to external factors. 2. After observing changes in gastric pressure, it was found that it could not be used in a closed loop with existing feeding pumps; In view of this, this application provides a feeding tube that can monitor gastric pressure in real time in order to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to solve the problem of inaccurate pressure monitoring caused by the external placement of the pressure sensor in traditional feeding tubes with pressure sensors.

[0004] To achieve the above objectives, this utility model provides the following basic solution: A feeding tube capable of real-time monitoring of intragastric pressure includes a feeding tube body fixed through the nose, an extension connected to one end of the feeding tube body, and a pressure monitoring component disposed at the other end of the feeding tube body. The pressure monitoring component includes an annular groove at the end of the feeding tube body, an air bladder mounted on the annular groove, and a pressure-sensitive diaphragm assembly disposed around the air bladder for sensing pressure changes. The pressure-sensitive diaphragm assembly includes an inner frame, an outer frame, a support frame disposed between the inner and outer frames, an inner thin-film pressure sensor disposed inside the inner frame, and an outer thin-film pressure sensor disposed outside the outer frame. The inner thin-film pressure sensor is in contact with the airbag, and a battery pack for independent power supply is installed between the inner and outer frames.

[0005] Furthermore, the feeding tube body includes a tube body, a nutrient solution input channel inside the tube body, an airway communicating with the air bladder, and an air delivery tube outside the tube body that is connected to the airway. The inner wall of the end of the tube body away from the air bladder is provided with a threaded sleeve, and the threaded sleeve is threadedly connected to the extension tube.

[0006] Furthermore, a sealing tape is provided at the connection between the tube body and the extension tube.

[0007] Furthermore, the tube body is provided with medical tape for fixing the position of the tube body.

[0008] Furthermore, the tube body is made of medical-grade transparent silicone.

[0009] Furthermore, the monitoring system includes a monitoring device for displaying the nutrient solution infusion rate, a nutrient solution input device, and a feeding pump for nutrient solution input. It also includes a coordination system used in conjunction with the pressure monitoring component, the coordination system including a control chip, a signal processing module, and an algorithm module.

[0010] Furthermore, the signal processing module receives the electrical signal from the pressure-sensitive diaphragm assembly and filters and reduces the noise of the pressure signal. The algorithm module converts the processed electrical signal into a start signal and a stop signal, which are applied to the feeding pump.

[0011] Furthermore, the pressure-sensitive diaphragm assembly is also equipped with a pH sensor or a temperature sensor.

[0012] The principle and effect of this solution are as follows: 1. Compared with existing technologies, this solution has a simple structure and ingenious design. This device still uses a pressure sensor as the core of the design. It uses the pressure sensor to sense the pressure inside the stomach, and then realizes the feedback of food residue in the stomach through the pressure inside the stomach. Combined with the signal sensing of the pressure inside the stomach, it solves the problem of inaccurate pressure monitoring caused by the external pressure sensor in traditional feeding tubes with pressure sensors.

[0013] 2. Compared with existing technologies, the pressure sensor in this device is built into the stomach, allowing for close-range sensing of stomach pressure, ensuring accurate pressure sensing, avoiding the influence of external factors on the pressure sensor, and improving the accuracy of the pressure sensor.

[0014] 3. Compared with existing technologies, this device innovates in pressure sensing by using fasting pressure as the reference pressure. When there is severe underfeeding or severe gastric retention, the gastric pressure deviates from the reference pressure. The pressure deviation is sensed by a pressure-sensitive diaphragm to obtain a pressure signal. This pressure signal, in conjunction with the monitoring system, provides feedback on the gastric pressure. After the gastric pressure is fed back, it works in conjunction with the feeding pump to make the feeding pump work or not work. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the installation of a feeding tube capable of real-time monitoring of gastric pressure, according to an embodiment of this application, is shown. Figure 2 This illustration shows a schematic diagram of a feeding tube capable of real-time monitoring of intragastric pressure according to an embodiment of this application. Figure 3 This application illustrates a feeding tube capable of real-time monitoring of intragastric pressure, as proposed in an embodiment. Figure 2 Partial diagram Figure 1 ; Figure 4 This application illustrates a feeding tube capable of real-time monitoring of intragastric pressure, as proposed in an embodiment. Figure 2 Partial diagram Figure 2 ; Figure 5 This illustration shows a schematic diagram of the installation position of the balloon in a feeding tube that can monitor intragastric pressure in real time, according to an embodiment of this application. Figure 6This illustration shows a schematic diagram of the operating principle of a feeding tube system capable of real-time monitoring of intragastric pressure, as proposed in an embodiment of this application. Figure 7 This illustration shows a schematic diagram of the specific structure of a pressure-sensitive diaphragm integration component in a feeding tube that can monitor intragastric pressure in real time, according to an embodiment of this application. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] The reference numerals in the accompanying drawings include: feeding tube body 1, tube body 101, nutrient solution input channel 102, annular groove 103, air bag 104, airway 105, threaded sleeve 106, air delivery tube 107, pressure-sensitive diaphragm integrated component 108, inner frame 1081, outer frame 1082, battery pack 1083, support frame 1084, inner membrane pressure sensor 1085, outer membrane pressure sensor 1086, extension tube 2, monitoring system 3, control chip 301, signal processing module 302, algorithm module 303, and feeding pump 304.

[0019] Implementation, for example Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown: A feeding tube capable of real-time monitoring of intragastric pressure includes a feeding tube body 1 fixed through the nose, an extension tube 2 connected to one end of the feeding tube body 1, a pressure monitoring component disposed at the other end of the feeding tube body 1, and a monitoring system 3 used in conjunction with the pressure monitoring component. The monitoring system 3 adjusts the nutrient solution infusion rate in real time according to the pressure monitoring component. The pressure monitoring assembly includes an annular groove 103 at the end of the feeding tube body 1, an air bladder 104 mounted on the annular groove 103, and a pressure-sensitive diaphragm integration 108 disposed on the outer periphery of the air bladder 104 and connected to the monitoring system 3.

[0020] like Figure 1 As shown, the feeding tube is inserted into the stomach through the nose, and nutrients are delivered directly to the stomach through the tube to maintain the patient's nutritional needs. However, due to the differences in the digestive capacity of different patients, the traditional method of feeding nutrient solution at fixed times is not reliable. Changes in gastric pressure cannot be monitored in real time, and the feeding speed adjustment is delayed, which can easily lead to gastric retention, reflux or insufficient feeding. Based on this, a feeding tube that can monitor gastric pressure in real time is proposed. Figure 2As shown, regarding the feeding tube: the feeding tube body 1 includes a tube body 101, a nutrient solution input channel 102 disposed inside the tube body 101, an airway 105 communicating with the airbag 104, and an air delivery tube 107 disposed outside the tube body 101 and connected to the airway 105. A threaded sleeve 106 is provided on the inner wall of the end of the tube body 101 away from the airbag 104, and the threaded sleeve 106 is threadedly connected to the extension tube 2.

[0021] The nutrient solution inlet channel 102 is used for nutrient solution inlet. The feeding tube body 1 and the extension tube 2 are connected by the threaded sleeve 106. For the feeding tube, the installation position of the monitoring system 3 and the position of the patient need to be considered. Therefore, the extension tube 2 is used to reasonably arrange the installation position of the monitoring system 3 and the position of the patient. Based on this, a sealing tape is provided at the connection between the tube body 101 and the extension tube 2, and a medical tape is provided on the tube body 101 to fix the position of the tube body 101. The relative position of the tube body 101 and the patient is fixed by the medical tape. Similarly, this product is a medical device, therefore, the material of the tube body 101 is medical transparent silicone.

[0022] Regarding the pressure-sensitive diaphragm integration 108: The pressure-sensitive diaphragm integration 108 is also equipped with a pH sensor or a temperature sensor, which can help determine the properties of substances in the stomach, such as whether there is a risk of reflux. like Figure 7 As shown, the pressure-sensitive diaphragm assembly 108 includes an inner frame 1081, an outer frame 1082, a support frame 1084 disposed between the inner frame 1081 and the outer frame 1082, an inner thin-film pressure sensor 1085 disposed inside the inner frame 1081, and an outer thin-film pressure sensor 1086 disposed outside the outer frame 1082. The inner thin-film pressure sensor 1085 is in contact with the airbag, and a battery pack 1083 for independent power supply is installed between the inner frame 1081 and the outer frame 1082. Specifically: The inner frame 1081 and the outer frame 1082 are fixed using the support frame 1084, and the battery pack 1083 is fixedly installed between the inner frame 1081 and the outer frame 1082 to power the inner membrane pressure sensor 1085 and the outer membrane pressure sensor 1086.

[0023] like Figure 3As shown, after the pressure-sensitive diaphragm assembly 108 is inserted into the stomach, the gas delivery tube 107 needs to be activated to inflate the air bladder 104. The pressure-sensitive diaphragm assembly 108 needs to have pressure-sensitive monitoring functions on both sides, that is, it is equipped with an inner membrane pressure sensor 1085 and an outer membrane pressure sensor 1086. After the air bladder 104 inflates, the inner membrane pressure sensor 1085 outputs a pressure signal, and the outer membrane pressure sensor 1086 outputs the pressure signal of the stomach at this time. The value of the pressure-sensitive diaphragm assembly 108 is adjusted by the monitoring system. This value is the difference between the values ​​on both sides. It is directly adjusted to "0", which is the optimal state for the patient. In actual practice, the pressure-sensitive diaphragm assembly 108 is inserted into the stomach when the patient is in a fasting state. That is, the outer membrane pressure sensor 1086 outputs the fasting stomach pressure. After eating, the stomach pressure increases, exerting a positive pressure on the air sac 104. The pressure-sensitive diaphragm integration component 108 experiences pressure on its outer surface, causing the output of the outer thin-film pressure sensor 1086 to increase, indicating the presence of food inside the stomach. As the food is digested, the stomach pressure returns to normal, and the value of the pressure-sensitive diaphragm integration component 108 returns to "0". If the food is not digested properly, i.e., it does not return to "0" within the normal time, it indicates gastric retention. In the case of gastric retention, nutrient solution feeding should not be performed. Similarly, when food is digested too quickly, the pressure of the air sac 104 itself will not change, that is, the output of the inner membrane pressure sensor 1085 is constant. When food is digested too quickly, it will cause phenomena such as rapid gastric contraction that change the gastric pressure, which will make the gastric pressure less than the fasting pressure value. For the air sac 104 itself, the pressure of the air sac 104 itself is greater than the gastric pressure at this time, and the value generated at this time is negative, indicating that the feeding is insufficient and the feeding pump 304 needs to be started quickly, even if it is not the feeding pump 304 start time. Based on the above principles: This structure includes a monitoring system 3, which comprises a monitoring device for displaying the nutrient solution infusion rate, a nutrient solution input device, and a feeding pump 304 for nutrient solution input. It also includes a coordination system used in conjunction with the pressure monitoring component. The coordination system includes a control chip 301, a signal processing module 302, and an algorithm module 303. The signal processing module 302 receives the electrical signal from the pressure-sensitive diaphragm integration component 108 and filters and reduces the noise of the pressure signal. The algorithm module 303 converts the processed electrical signal into a start signal and a stop signal, which are applied to the feeding pump 304.

[0024] First, the signal processing module 302 receives the electrical signal from the pressure-sensitive diaphragm integration 108. As mentioned above, this electrical signal has "positive" and "negative" values, which correspond to different stomach conditions. After the signal processing module 302 filters and reduces noise, the signal enters the algorithm module 303. The core of the algorithm module 303 is to convert the pressure electrical signal into a device start signal. Regarding Algorithm Module 303: First, the electrical signal output by the signal processing module 302 is usually weak and needs to be amplified to a processable range by an operational amplifier or integrated circuit. Then, the analog signal is converted into a digital signal, which is usually achieved by an ADC chip or a built-in AD module in a microcontroller. Finally, a start command is sent to the feeding pump 304 through the corresponding CAN communication protocol. For the feeding pump 304, when it receives a "positive" signal, the feeding pump 304 cannot start and has a higher priority than the feeding pump 304 timed feeding command; when it receives a "negative" signal, the feeding pump 304 starts and has a higher priority than the feeding pump 304 timed feeding command.

[0025] This device solves the problem of inaccurate pressure detection caused by the external placement of the pressure sensor in traditional feeding tubes with pressure sensors.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A feeding tube capable of real-time monitoring of intragastric pressure, characterized in that, Includes a feeding tube body fixed in the nose, an extension connected to one end of the feeding tube body, and a pressure monitoring component located at the other end of the feeding tube body; The pressure monitoring component includes an annular groove at the end of the feeding tube body, an air bladder mounted on the annular groove, and a pressure-sensitive diaphragm assembly disposed around the air bladder for sensing pressure changes. The pressure-sensitive diaphragm assembly includes an inner frame, an outer frame, a support frame disposed between the inner and outer frames, an inner thin-film pressure sensor disposed inside the inner frame, and an outer thin-film pressure sensor disposed outside the outer frame. The inner thin-film pressure sensor is in contact with the airbag, and a battery pack for independent power supply is installed between the inner and outer frames.

2. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 1, characterized in that, The feeding tube body includes a tube body, a nutrient solution input channel inside the tube body, an airway communicating with an air bladder, and an air delivery tube outside the tube body that is connected to the airway. The inner wall of the end of the tube body away from the air bladder is provided with a threaded sleeve, which is threadedly connected to an extension tube.

3. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 2, characterized in that, A sealing tape is provided at the connection between the pipe body and the extension pipe.

4. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 2, characterized in that, The tube body is provided with medical tape for fixing its position.

5. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 3 or 4, characterized in that, The tube is made of medical-grade transparent silicone.

6. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 5, characterized in that, It also includes a monitoring system used in conjunction with the pressure monitoring component. The monitoring system adjusts the nutrient solution infusion rate in real time according to the pressure monitoring component. The monitoring system includes a monitoring device for displaying the nutrient solution infusion rate, a nutrient solution input device, and a feeding pump for nutrient solution input. It also includes a coordination system used in conjunction with the pressure monitoring component. The coordination system includes a control chip, a signal processing module, and an algorithm module.

7. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 6, characterized in that, The signal processing module receives the electrical signal from the pressure-sensitive diaphragm assembly and filters and reduces the noise of the pressure signal. The algorithm module converts the processed electrical signal into a start signal and a stop signal, which are applied to the feeding pump.

8. A feeding tube capable of real-time monitoring of intragastric pressure according to claim 7, characterized in that, The pressure-sensitive diaphragm assembly is also equipped with a pH sensor or a temperature sensor.

Images