Nasointestinal tube patency monitoring system

Abstract

The invention relates to the technical field of medical instruments, in particular to a nasointestinal tube patency monitoring system which comprises a nasointestinal tube body. The conveying pipe is connected to the upper portion of the nasointestinal tube body and used for conveying the nutrient solution or used for being connected with a self-inflating and self-inhaling device and used for alternately achieving inflating examination and inhaling examination; the flow sensor is arranged between the nasointestinal tube body and the conveying tube and used for collecting the infusion flow rate of the nutrient solution; the pressure sensor is arranged at the connector of the nasointestinal tube body and used for monitoring the liquid pressure when the nutrient solution is infused in the nasointestinal tube body or the pumpback pressure and the injection pressure when the nutrient solution is not infused in the nasointestinal tube body; the processing module is connected with the flow sensor and the pressure sensor and used for generating early warning information based on the infusion flow speed and the fluid pressure or based on the pumpback pressure and the injection pressure; the early warning module is connected with the processing module and used for displaying early warning information, and the efficiency of monitoring the smoothness of the nasointestinal tube is improved by indirectly judging the blockage condition of the nasointestinal tube.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a nasoenteric tube patency monitoring system. Background Technology

[0002] A nasoenteric tube is a medical device used for enteral nutrition support. It is inserted through the nasal cavity, passes through the pharynx, esophagus, and stomach, and finally reaches the duodenum or jejunum to deliver nutrient solution directly to the intestines, providing nutritional support for patients who cannot eat orally or have gastric emptying disorders.

[0003] Nasoenteric tubes are mainly used for patients who are unable to eat orally, have gastrointestinal dysfunction (such as gastroparesis or delayed gastric emptying), have acute pancreatitis, require mechanical ventilation, or have difficulty swallowing due to brain diseases. They can bypass the stomach and deliver nutrients directly to the small intestine, reducing the risk of aspiration and protecting intestinal function.

[0004] Nasoenteric tubes are a "lifeline" for critically ill patients and those with special diseases, reducing the occurrence of events such as feeding intolerance, aspiration, and gastroesophageal reflux pneumonia, and providing a convenient pathway for nutritional therapy. However, critically ill patients have unique circumstances, often experiencing gastrointestinal mucosal edema, insufficient motility, and postoperative anatomical changes, which can lead to unsuccessful tube placement.

[0005] Spiral nasoenteric tubes are commonly used in clinical practice. The tube is typically 145cm long, with an inner diameter of 2.4mm and an outer diameter of 3mm—much thinner than a typical mobile phone charging cable. Due to the slender structure of the nasoenteric tube and the viscous nature of enteral nutrition preparations, if nurses do not correctly time or use proper flushing techniques, the nutritional preparations may adhere to the inner wall of the tube, narrowing it and potentially causing blockage.

[0006] In clinical practice, the incidence of nasoenteric tube blockage in patients receiving enteral nutrition via nasoenteric tube ranges from 3% to 21%. Nasoenteric tube blockage not only affects patients' nutritional intake, but repositioning the tube also causes unnecessary suffering and financial burden. Therefore, preventing nasoenteric tube blockage is crucial. Currently, monitoring nasoenteric tube patency mainly relies on manual aspiration and increased rounds of visits.

[0007] Manual spot checks are not only inefficient but also have a time lag, making it impossible to detect blockages in a timely manner and thus impossible to respond promptly.

[0008] Therefore, improving the efficiency of nasoenteric tube patency monitoring is a pressing technical problem that needs to be solved. Summary of the Invention

[0009] In view of the above problems, the present invention provides a nasoenteric tube patency monitoring system that overcomes or at least partially solves the above problems.

[0010] This invention provides a nasoenteric tube patency monitoring system, comprising: The nasoenteric tube body is used for insertion into the patient's nasal cavity; A delivery tube, connected above the nasoenteric tube, is used to deliver nutrient solution, or to connect a self-inflating and inhalation device for alternating inflation and inhalation checks. A flow sensor, located between the nasoenteric tube body and the delivery tube, is used to collect the infusion flow rate of the nutrient solution; A pressure sensor is installed at the interface of the nasoenteric tube to monitor the fluid pressure when there is nutrient solution infusion in the nasoenteric tube, or the back pressure and injection pressure when there is no nutrient solution infusion. The processing module, connected to the flow sensor and the pressure sensor, is used to generate early warning information based on the infusion flow rate and the fluid pressure, or based on the backflow pressure and the injection pressure; The early warning module, connected to the processing module, is used to display the early warning information.

[0011] Preferably, it further includes: The transmission module, connected to the processing module, is used to transmit the early warning information to the nurse station management server, so that the nurse station server can notify the supervising nurse of the patient's bed and alarm information.

[0012] Preferably, it further includes: A temperature sensor, installed at the delivery pipe, is used to collect temperature information of the nutrient solution; The processing module filters out the interference of temperature information on the infusion flow rate and fluid pressure based on the temperature information, so as to correct the infusion flow rate and fluid pressure.

[0013] Preferably, it further includes: a first timer, used to time the first duration for which the infusion flow rate exceeds a first preset value; The second timer is used to time the second duration during which the fluid pressure exceeds a second preset value; Preferably, the processing module is specifically used for: Set the flow rate for obtaining the nutrient solution; Based on the infusion flow rate, determine the ratio between the infusion flow rate and the set flow rate; Based on the ratio, the first duration, the fluid pressure, and the second duration, an early warning message is generated; or Based on the ratio relationship, the first duration, and the change in fluid pressure, an early warning message is generated.

[0014] Preferably, the processing module is specifically used for: When nutrient solution is being infused, if the ratio is less than 50%, the first duration is greater than or equal to 10 minutes, the fluid pressure is greater than 200 mmHg, and the second duration is greater than or equal to 10 minutes, a first warning message is generated. This first warning message indicates that there is a risk of blockage in the nasoenteric tube. Or If the ratio is less than 50% and the first duration is greater than or equal to 10 minutes, and the fluid pressure suddenly increases by more than 50% within a first preset time, a first warning message is generated.

[0015] Preferably, the processing module is specifically used for: When nutrient solution is being infused, if the ratio is less than 30%, the first duration is greater than or equal to 10 minutes, the fluid pressure is greater than 300 mmHg, and the second duration is greater than or equal to 10 minutes, a second warning message is generated, indicating that the nasoenteric tube is blocked; or If the ratio is less than 30% and the first duration is greater than or equal to 10 minutes, and the fluid pressure increases by more than 80% within a second preset time, a second warning message is generated.

[0016] Preferably, the processing module is specifically used for: When no nutrient solution is being infused, if the aspiration pressure is greater than 150 mmHg and no intestinal fluid is aspirated, and the injection pressure is greater than 200 mmHg and there is no relief after 10 minutes, a third warning message is generated, indicating that there is a risk of blockage in the nasoenteric tube.

[0017] Preferably, the processing module is specifically used for: When there is no nutrient solution infusion, if the aspiration pressure is greater than 200 mmHg and aspiration is not possible, and the injection pressure is greater than 300 mmHg and there is no relief after 10 minutes, a fourth warning message is generated, indicating that the nasoenteric tube is blocked.

[0018] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: This invention provides a nasoenteric tube patency monitoring system, comprising: a nasoenteric tube body for insertion into a patient's nasal cavity; a delivery tube connected above the nasoenteric tube body for delivering nutrient solution; a flow sensor disposed between the nasoenteric tube body and the delivery tube for collecting the infusion flow rate of the nutrient solution, or for connecting a self-inflating and inhalation device for alternating inflating and inhalation checks; a pressure sensor disposed at the nasoenteric tube body interface for monitoring the fluid pressure when nutrient solution is being infused into the nasoenteric tube body, or the aspiration and injection pressure when no nutrient solution is being infused; a processing module connected to the flow sensor and the pressure sensor for generating early warning information based on the infusion flow rate and fluid pressure, or based on the aspiration and injection pressure; and an early warning module connected to the processing module for displaying the early warning information. By monitoring the flow rate and pressure of the infused fluid in the nasoenteric tube in real time, as well as the injection and aspiration pressures using the self-inflating and inhalation device, the system indirectly determines the blockage status and promptly issues an alarm through the early warning module, thereby improving the efficiency of nasoenteric tube patency monitoring. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference figures denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the nasoenteric tube patency monitoring system in an embodiment of the present invention is shown. Detailed Implementation

[0020] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0021] Embodiments of the present invention provide a nasoenteric tube patency monitoring system, such as Figure 1 As shown, it includes: Nasoenteric tube body 101, used for insertion into the nasal cavity of critically ill patients; The delivery tube 102 is connected above the nasoenteric tube body 101 and is used to deliver nutrient solution or to connect a self-inflating and inhalation device for alternating inflating and inhalation checks. A flow sensor 103 is disposed between the nasoenteric tube body 101 and the delivery tube 102 to collect the infusion flow rate of the nutrient solution. Pressure sensor 104 is located at the interface of nasoenteric tube body 101 and is used to monitor the fluid pressure when there is nutrient solution infusion in the nasoenteric tube body, or the back pressure and push pressure when there is no nutrient solution infusion. The processing module 105 is connected to the flow sensor 103 and the pressure sensor 104, and is used to generate early warning information based on the infusion flow rate and fluid pressure, or based on the back pressure and injection pressure. The early warning module 106 is connected to the processing module 105 and is used to display early warning information.

[0022] First, one end of the nasoenteric tube 101 is inserted into the patient's nasal cavity, and the other end is used for infusion of nutrient solution, so that the nutrient solution is directly delivered to the intestine through the nasoenteric tube 101 to provide nutrition for patients with dysphagia who cannot eat orally.

[0023] A delivery tube 102 is connected to the other end of the nasoenteric tube 101 to deliver nutrient solution. The delivery of the nutrient solution is achieved through a delivery device that can more accurately and safely control the infusion rate and temperature to reduce the risk of complications.

[0024] On the other hand, the delivery pipe 102 can also be connected to a self-inflating and suction device to alternately perform inflation and suction checks to determine whether it is blocked.

[0025] A flow sensor is installed between the nasoenteric tube body 101 and the delivery tube 102 to collect the infusion flow rate of the nutrient solution in real time. Although the delivery device for the nutrient solution can be set to an infusion rate, there is a difference between the actual infusion flow rate and the set infusion flow rate due to interference from various other factors.

[0026] Meanwhile, a pressure sensor 104 is also installed at the interface of the nasoenteric tube body 101. This pressure sensor 104 can be used to monitor the fluid pressure of the nutrient solution inside the nasoenteric tube body 101. Changes in this fluid pressure can indicate the degree of blockage. Generally, the fluid pressure will increase when blockage occurs. Of course, the injection pressure or aspiration pressure can also be monitored when there is no nutrient solution infusion.

[0027] To enable clear monitoring of any obstruction within the nasoenteric tube 101, obstruction warnings are issued based on monitoring both the infusion rate and fluid pressure when nutrient solution is being infused. When no nutrient solution is being infused, obstruction warnings are issued based on the infusion pressure during inflation or the aspiration pressure during inspiration.

[0028] Specifically, the processing module 105 is used to generate early warning information based on the infusion flow rate and fluid pressure.

[0029] Prior to this, the system also includes: a first timer for timing the first duration during which the infusion flow rate exceeds a first preset value; The second timer is used to time the second duration for which the fluid pressure exceeds a second preset value.

[0030] The first timer is used to time when the infusion flow rate reaches a first preset value, which is predetermined and related to the set flow rate. The second timer is used to time when the fluid pressure reaches a second preset value, which is also predetermined.

[0031] Specifically, processing module 105 is used for: Set the flow rate for obtaining the nutrient solution; Based on the infusion flow rate, determine the ratio between the infusion flow rate and the set flow rate; Based on the ratio, the first duration, the fluid pressure, and the second duration, an early warning message is generated; or based on the ratio, the first duration, and the changes in the fluid pressure, an early warning message is generated. When there is no nutrient solution infusion, an early warning message is generated based on the back pressure and injection pressure.

[0032] When nutrient solution is being infused, each time an early warning message is generated, not only the fluid pressure but also the infusion rate must be considered. The following is a detailed explanation of each early warning method.

[0033] Specifically, this includes early warnings of congestion risk and early warnings of congestion that has already occurred.

[0034] Among them, the early warning of congestion risk: During nutrient infusion, the processing module 105 generates a first warning when it detects that the ratio is less than 50%, the first duration is greater than or equal to 10 minutes, the fluid pressure is greater than 200 mmHg, and the second duration is greater than or equal to 10 minutes. This first warning indicates a risk of blockage in the nasoenteric tube. The ratio is the ratio of the infusion flow rate to the set flow rate.

[0035] In another approach, the processing module 105 generates a first warning message when it detects that the ratio is less than 50%, the first duration is greater than or equal to 10 minutes, and the fluid pressure rises by more than 50% within a first preset time.

[0036] In other words, if the ratio of the infusion flow rate to the set flow rate is less than 50% and the duration exceeds 10 minutes, the fluid pressure is greater than 200 mmHg and the duration exceeds 10 minutes, or the fluid pressure increases by more than 50% within the first preset time, then a first warning message will be generated, indicating that there is a risk of blockage in the nasoenteric tube.

[0037] Warning that a congestion has occurred: The processing module 105 detects that when the ratio is less than 30%, the first duration is greater than or equal to 10 minutes, the fluid pressure is greater than 300 mmHg, and the second duration is greater than or equal to 10 minutes, it generates a second warning message, which indicates that the nasoenteric tube body 101 is blocked.

[0038] Alternatively, the processing module 105 detects that when the ratio is less than 30% and the first duration is greater than or equal to 10 minutes, the fluid pressure rises sharply by more than 80% within a second preset time period, and generates a second warning message.

[0039] In other words, if the ratio of the infusion flow rate to the set flow rate is less than 30% and the duration exceeds 10 minutes, the fluid pressure is greater than 300 mmHg and the duration exceeds 10 minutes, or the fluid pressure increases by more than 80% within the second preset time, then a second warning message will be generated, indicating that the nasoenteric tube body 101 has been blocked.

[0040] In order to improve the monitoring accuracy, it is necessary to filter out the effects of temperature on fluid pressure and injection flow rate during the above monitoring process.

[0041] Specifically, the system also includes a temperature sensor, which is installed at the delivery pipe 102 to collect temperature information of the nutrient solution; The processing module 105 filters out the interference of temperature information on the infusion flow rate and fluid pressure based on temperature information, so as to correct the infusion flow rate and fluid pressure.

[0042] Specifically, by constructing a temperature compensation model for the infusion flow rate and a temperature compensation model for the fluid pressure, flow rate correction factors and pressure correction factors at different temperatures can be obtained. Then, the flow rate correction factor is used to correct the currently collected infusion flow rate, and the pressure correction factor is used to correct the currently collected fluid pressure.

[0043] Without nutrient infusion, the processing module 105 detected that when the aspiration pressure was greater than 150 mmHg, no intestinal fluid was aspirated. When the injection pressure was greater than 200 mmHg and continued for 10 minutes without relief, a third warning message was generated, indicating that there was a risk of blockage in the nasoenteric tube body 101.

[0044] Without nutrient infusion, the processing module 105 detected that the aspiration pressure was greater than 200 mmHg and aspiration was not possible, and the injection pressure was greater than 300 mmHg and continued for 10 minutes without relief, generating a fourth warning message. The fourth warning message indicates that the nasoenteric tube body 101 is blocked.

[0045] When there is no nutrient infusion, such as through inspiratory-controlled aspiration or inflation-controlled injection, it can be determined whether there is a blockage in the nasoenteric tube body 101, so that the nasoenteric tube body can be replaced as soon as possible.

[0046] In an optional implementation, the system further includes a transmission module and a connection processing module 105, used to transmit the warning information to the nurse station management server, so that the nurse station server can notify the supervising nurse of patient bed availability and alarm information. This remote notification method can shorten the warning time, allowing the supervising nurse to check as quickly as possible.

[0047] Of course, in order to further shorten the time for early warning notification, it can also be sent to the terminal devices of medical staff on night patrols, so that the supervising medical staff can confirm the early warning information as soon as possible.

[0048] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: This invention provides a nasoenteric tube patency monitoring system, comprising: a nasoenteric tube body for insertion into a patient's nasal cavity; a delivery tube connected above the nasoenteric tube body for delivering nutrient solution; a flow sensor disposed between the nasoenteric tube body and the delivery tube for collecting the infusion flow rate of the nutrient solution, or for connecting a self-inflating and inhalation device for performing inflation and inhalation checks at a lower speed; a pressure sensor disposed at the interface of the nasoenteric tube body for monitoring the fluid pressure when nutrient solution is being infused into the nasoenteric tube body, or the aspiration pressure and injection pressure when no nutrient solution is being infused; a processing module connected to the flow sensor and the pressure sensor for generating early warning information based on the infusion flow rate and fluid pressure, or based on the aspiration pressure and injection pressure; and an early warning module connected to the processing module for displaying the early warning information. By real-time monitoring of the infusion fluid flow rate and pressure within the nasoenteric tube, and by using a self-inflating and inhalation device to alternately perform inflation and inhalation checks, the system indirectly determines the patency status of the nasoenteric tube and promptly issues an alarm through the early warning module, thereby improving the efficiency of nasoenteric tube patency monitoring.

[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A nasojejunal tube patency monitoring system, comprising: The method comprises the following steps: a nasojejunal tube body for inserting from a patient's nasal cavity; a delivery tube connected to the nasojejunal tube body for delivering a nutrient solution, or for connecting a self-inflating and suction device for alternately achieving an inflation check and a suction check; a flow sensor arranged between the nasojejunal tube body and the delivery tube for collecting an infusion flow rate of the nutrient solution; a pressure sensor arranged at an interface of the nasojejunal tube body for monitoring a fluid pressure when the nutrient solution is infused in the nasojejunal tube body, or a suction pressure and a bolus pressure when the nutrient solution is not infused; a processing module connected to the flow sensor and the pressure sensor for generating early warning information based on the infusion flow rate and the fluid pressure, or based on the suction pressure and the bolus pressure; an early warning module connected to the processing module for displaying the early warning information.

2. The system of claim 1, wherein, Further comprising: a transmission module connected to the processing module for transmitting the early warning information to a nurse station management server to prompt a supervising nurse about a patient bed and alarm information through the nurse station server.

3. The system of claim 1, wherein, Further comprising: a temperature sensor arranged at the delivery tube for collecting temperature information of the nutrient solution; the processing module filters out interference of the temperature information on the infusion flow rate and the fluid pressure based on the temperature information to correct the infusion flow rate and the fluid pressure.

4. The system of claim 1, wherein, Further comprising: a first timer for timing a first duration when the infusion flow rate exceeds a first preset value; a second timer for timing a second duration when the fluid pressure exceeds a second preset value.

5. The system of claim 4, wherein, The processing module is specifically configured to: obtain a set flow rate of the nutrient solution; determine a ratio relationship between the infusion flow rate and the set flow rate based on the infusion flow rate; generate early warning information based on the ratio relationship, the first duration, the fluid pressure, and the second duration; or generate early warning information based on the ratio relationship, the first duration, and a change of the fluid pressure; when there is no infusion of the nutrient solution, generate early warning information based on the suction pressure and the bolus pressure. The processing module is specifically configured to:

6. The system of claim 5, wherein, when there is infusion of the nutrient solution, generate first early warning information when the ratio relationship is less than 50%, the first duration is greater than or equal to 10 min, the fluid pressure is greater than 200 mmHg, and the second duration is greater than or equal to 10 min, the first early warning information indicating that there is a risk of blockage of the nasojejunal tube body; or generate the first early warning information when the ratio relationship is less than 50% and the first duration is greater than or equal to 10 min, and a sudden increase amplitude of the fluid pressure within a first preset time exceeds 50%. The processing module is specifically configured to: when there is infusion of the nutrient solution, generate second early warning information when the ratio relationship is less than 30%, the first duration is greater than or equal to 10 min, the fluid pressure is greater than 300 mmHg, and the second duration is greater than or equal to 10 min, the second early warning information indicating that the nasojejunal tube body is blocked; or 7. The system of claim 5, wherein, generate the second early warning information when the ratio relationship is less than 30% and the first duration is greater than or equal to 10 min, and a sudden increase amplitude of the fluid pressure within a second preset time is greater than 80%. The processing module is specifically configured to: ​ ​ 8. The system of claim 5, wherein, ​ When the backflow pressure is greater than 150 mmHg and no intestinal fluid is extracted, and the injection pressure is greater than 200 mmHg and lasts for 10 minutes without relief, a third early warning information is generated, which indicates that the nasal intestinal tube body has a risk of blockage.

9. The system of claim 5, wherein, The processing module is specifically used for: When the backflow pressure is greater than 200 mmHg and no intestinal fluid is extracted, and the injection pressure is greater than 300 mmHg and lasts for 10 minutes without relief, a fourth early warning information is generated, which indicates that the nasal intestinal tube body has been blocked.

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