An alarm device for preventing accidental extubation in stroke patients

Abstract

This invention relates to an alarm device for preventing accidental catheter removal. The device includes an image acquisition unit, a distance detection component, and a processor. The processor is configured to: determine changes in the shape and / or usage status of the catheter based on displacement information related to changes in the catheter's position provided by the first and / or second distance detection units, and the overlap rate between an image of the internal tissue features of the distal end of the catheter provided by the image acquisition unit and the tissue features of a preset standard image set. This invention uses the distance detection component and the image acquisition unit to assess the catheter's position in the stomach, enabling timely detection of catheter abnormalities. Medical personnel can distinguish situations where the catheter's removal distance is unclear due to bending based on the information detected by the distance detection component and the image acquisition unit.

Description

Technical Field

[0001] This invention relates to the field of catheter dislodgement technology, and to a catheter dislodgement monitoring device, specifically an alarm device to prevent accidental extubation, and more particularly to an alarm device to prevent accidental extubation in stroke patients. Background Technology

[0002] A nasogastric tube is used in special circumstances to deliver necessary fluids and food to patients who cannot swallow. For patients unable to eat orally, the tube is inserted into the esophagus through the mouth or nostril, then through the pharynx, and finally into the stomach. Water, food, or medications are delivered into the nasogastric tube and stomach to ensure adequate nutrition, hydration, and medication intake. In clinical practice, many patients require nasogastric tubes for weeks, months, or even years. For adults, the insertion depth of a nasogastric tube is typically 50–55 cm, while a two-way tube is inserted to a depth of 20–25 cm, passing through the pharynx and esophagus to reach the stomach. After insertion, the tube is usually secured with adhesive tape. In actual treatment, nasogastric tubes are generally inserted by medical staff based on experience. For inexperienced medical staff, the success rate is low, and it may lead to damage to the nasopharyngeal and esophageal mucosa, arytenoid cartilage dislocation, and other symptoms. Gastric tube dislodgement is a common occurrence during use. Factors such as increased intra-abdominal pressure from violent coughing, sneezing, or vomiting can cause the tube to shift, increasing the risk of dislodgement. Improper handling during patient repositioning or clothing changes can also lead to excessive pulling and dislodgement. Patients may also manually pull out the tube when uncomfortable or unconscious. Unplanned extubation is a critical issue in clinical risk management, closely related to patient safety and treatment outcomes. Improper removal can cause food to enter the esophagus or rupture, leading to suffocation. Furthermore, improper removal or reinsertion of the tube can damage the tracheal mucosa, causing infection. Serious accidental extubation can endanger a patient's life.

[0003] When patients cannot maintain adequate ventilation or oxygenation and therefore cannot achieve sufficient gas exchange, mechanical ventilation is typically used. Ventilators include invasive and non-invasive models. Invasive ventilators involve endotracheal intubation; unplanned extubation can lead to respiratory arrest and death. Some patients use non-invasive ventilators, where they are not completely unconscious. Unplanned extubation can cause symptoms such as chest tightness, shortness of breath, and difficulty breathing. With the help of medical staff, these symptoms can be controlled by reinserting the ventilator. Intubation is very uncomfortable for patients, especially conscious ones, and they may attempt to extubate themselves. Extubation in ventilator-using patients carries a risk of worsening respiratory failure and is dangerous.

[0004] Studies have shown that the incidence of unplanned extubation reaches approximately 10%, of which 60% require reintubation by healthcare professionals. This increases the workload of healthcare staff and is detrimental to the patient's condition. To address this issue, existing technologies provide alarm devices to prevent accidental extubation. For example, utility model publication CN217245627U provides a gastric tube dislodgement alarm device, including a nasal fixation ring with a dislodgement sensor; a dislodgement probe is inserted into the dislodgement sensor from bottom to top, and the dislodgement probe is connected to a sling tie via a rope, which is secured to the gastric tube outlet; the dislodgement sensor is connected to an alarm via a lead wire, and the device triggers an alarm by detecting when the dislodgement probe has dislodged from the sensor. The invention disclosed in CN110743081B provides an alarm device to prevent accidental extubation, including a catheter clamp and an alarm box connected to the upper part of its front end. In use, the catheter is clamped between the catheter clamp and the horizontal bar. When the catheter is pulled, the pulling force acts on the catheter, causing the catheter to press against the spring block at the bottom of the alarm box, which in turn presses against the pressure sensor. The sensor converts the electrical signal and transmits it to the wireless alarm module. After analysis, the signal is transmitted from the audio output pin through a wire to the speaker to emit an alarm sound, thereby reminding medical staff to stop the extubation in time.

[0005] While existing technologies can promptly issue alarms to alert medical staff of catheter dislodgement, they cannot determine the need for an alarm based on the distance the catheter has dislodged. Currently, hospitals face staff shortages, and in cases of accidental extubation, medical staff cannot constantly monitor the patient's catheter insertion. Existing alarm devices for accidental extubation sound an alarm upon detecting catheter dislodgement, but some cases do not require notification of medical staff for intervention, such as when the catheter is only partially dislodged (2-3 cm), which the patient or family can easily reinsert. However, when the dislodged length is longer, such as over 10 cm, immediate notification of medical staff is necessary. The device still sounds an alarm in cases where notification is unnecessary, increasing the workload of medical staff and wasting medical resources. Furthermore, the tube is relatively flexible and prone to bending, curling, kinking, or reversing during insertion. Even the portion of the tube already inserted into the patient's stomach may bend or kink due to the patient's own movements or changes in position, preventing food or liquid from being delivered to the stomach or aspirating contents. Since the cause of this phenomenon cannot be accurately determined from the external nasal tube, it is necessary to analyze the patient's situation and the degree of danger based on the specific circumstances of accidental extubation to determine whether to notify medical staff. This approach aims to both reduce the burden on medical personnel and ensure timely detection and appropriate remedial measures.

[0006] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0007] During actual use of catheters, catheter bending can occur, misleading medical staff in judging the catheter's actual condition, especially since the distal position and direction of the bending cannot be determined. This invention addresses accidental catheter removal by including situations where the catheter is not in the correct position within the body and cannot function properly, as well as unplanned catheter removal. It should be noted that the accidental catheter removal alarm device provided by this invention can be used for catheter dislodgement monitoring; specifically, it relates to an accidental catheter removal alarm device for stroke patients.

[0008] It is especially suitable for monitoring accidental removal of nasogastric tubes.

[0009] To address the shortcomings of existing technologies, this invention provides an alarm device for preventing accidental pipe pulling, comprising:

[0010] An image acquisition unit, located at the distal end of the catheter, is configured to acquire images of internal human tissue features at the location of the distal end of the catheter.

[0011] A distance detection component includes at least a first distance detection unit disposed at the distal end of the catheter and a second distance detection unit disposed at the proximal end of the catheter, the distance detection component being configured to acquire displacement information of the catheter through the first distance detection unit and / or the second distance detection unit;

[0012] And a processor, which is communicatively connected to the image acquisition unit and the distance detection component, respectively;

[0013] The processor is configured to: determine the shape change and / or change in usage status of the catheter based on the displacement information related to the change in the catheter position provided by the first distance detection unit and / or the second distance detection unit, and the overlap rate between the human internal tissue feature image of the distal end of the catheter provided by the image acquisition unit and the tissue features of a preset standard image set.

[0014] Preferably, in response to displacement information related to catheter position changes provided by the first distance detection unit and / or the second distance detection unit, the processor controls the visualization component located at the distal end of the catheter to activate and acquire an image of the position of the distal end of the catheter. The displacement information related to position changes guides the displacement of the catheter from its initial fixed position toward the body or the displacement information caused by its removal from the body.

[0015] Preferably, the internal tissue feature image refers to the tissue structure feature image of the tissues or organs that the catheter passes through as it enters the human body, captured by the image acquisition unit located at the distal end of the catheter. Preferably, the image is of the esophagus. Specifically, the image can be of the longitudinal muscle layer, circular muscle layer, mucosal muscle layer, and other tissue structures inside the esophagus. Preferably, the image is of the stomach. Specifically, the image can be of the connective tissue of the lamina propria of the stomach. Specifically, the image can be of the gastric glands in the lamina propria of the stomach.

[0016] Preferably, the preset standard image set includes standard anatomical diagrams of different human digestive organs with structural features. The preset standard image set includes at least a standard anatomical diagram of the stomach with structural features of the stomach and a standard anatomical diagram of the esophagus with structural features of the esophagus. The preset standard image set of the image comparison unit can serve as a reference standard for the human body tissue feature images acquired by the image acquisition unit. Specifically, the standard anatomical diagrams corresponding to different digestive organs contain the structural features corresponding to each organ.

[0017] Preferably, the displacement information is configured as an electrical signal generated by the distance detection component when the catheter moves relative to the human body. Preferably, the distance detection component is communicatively connected to a signal processing unit capable of converting the displacement signal generated by the distance detection component into distance information. Preferably, the signal processing unit is a displacement sensor transmitter module. After sensing the displacement information, the distance detection component generates an electrical signal, which is then converted into digitally represented distance information by the displacement sensor transmitter module.

[0018] Preferably, the processor is configured to: when the displacement detected by the second distance detection unit remains unchanged, while the displacement detected by the first distance detection unit is within a predetermined range, and the overlap rate between the human internal tissue feature image of the distal end of the catheter and the tissue feature of a designated organ in a preset standard image set is greater than a verification threshold, the processor determines that the catheter has bent or moved and that the distal end of the catheter is in the designated organ.

[0019] Preferably, the processor is configured such that: when the displacement detected by the second distance detection unit remains unchanged, while the displacement detected by the first distance detection unit is within a predetermined range, the overlap rate between the internal tissue feature image of the distal end of the catheter and the tissue features of a designated organ in a preset standard image set is greater than a verification threshold, and the internal tissue feature image identifies abnormal gastric contents, the processor determines that the distal end of the catheter is located in the designated organ, and the bending of the catheter has caused damage to the patient's esophagus or stomach. Abnormal gastric contents include gastrointestinal bleeding, gastric blood clots, etc.

[0020] Preferably, the processor is configured to: determine that the distal end of the catheter has dislodged from the designated organ when the displacement detected by the second distance detection unit is the same as the displacement detected by the first distance detection unit and the displacement exceeds the upper limit of a predetermined range, and the overlap rate between the human internal tissue feature image of the distal end of the catheter and the tissue features of a non-designated organ in a preset standard image set is greater than a verification threshold.

[0021] Preferably, the processor is configured to: determine that the catheter has bent or moved in the body and that the distal end of the catheter has dislodged from the designated organ when the displacement detected by the first distance detection unit is greater than the displacement detected by the second distance detection unit and the displacement detected by the second distance detection unit exceeds the upper limit of a preset range, and the overlap rate between the human internal tissue feature image of the distal end of the catheter and the tissue features of a non-designated organ in a preset standard image set is greater than a verification threshold.

[0022] Preferably, the designated organ is the organ into which the catheter is inserted distally, allowing the catheter to function normally. Preferably, the designated organ is an organ into which the distal end of the catheter is inserted, as approved by medical personnel or doctors. For example, a nasogastric tube must be inserted into the patient's stomach to function properly; therefore, the designated organ is the stomach.

[0023] The verification threshold is a critical value used to determine the overlap rate of the organ type to which the human internal tissue feature image belongs.

[0024] Preferably, the verification threshold is set to 60% to 80%.

[0025] Preferably, the device further includes:

[0026] The signal processing unit is used to convert the displacement signal generated by the distance detection component into distance information and transmit the distance information to the analysis unit;

[0027] A storage unit is used to save the images captured by the image acquisition unit and transmit the images to the image comparison unit;

[0028] An alarm unit is used to receive alarm commands generated by the processor and issue corresponding alarm prompts.

[0029] Preferably, the device further includes a display unit for receiving and displaying the images captured by the image acquisition unit, wherein the images provided by the display unit can help the operator improve the success rate of catheter placement.

[0030] Preferably, the second distance detection unit is detachably connected to the catheter to accommodate catheters with different insertion depths.

[0031] Preferably, the image acquisition unit is communicatively connected to the storage unit to transmit the captured images to the storage unit.

[0032] Preferably, the processor is communicatively connected to the storage unit to receive the image from the storage unit and generate image analysis results through the image comparison unit.

[0033] Preferably, the processor is communicatively connected to the signal processing unit to receive the distance information and analyzes the distance information through the analysis unit to obtain the displacement change result.

[0034] Preferably, the processor is communicatively connected to the alarm unit to transmit the generated alarm command to the alarm unit.

[0035] Preferably, the image acquisition unit is communicatively connected to the storage unit to transmit the captured images to the storage unit.

[0036] Preferably, the image acquisition unit is communicatively connected to the display unit to transmit the captured images to the display unit. The operator can determine whether the catheter has been successfully inserted by observing the images provided by the display unit, or the operator can adjust the insertion direction and depth of the catheter by observing the images provided by the display unit.

[0037] Preferably, the image acquisition unit has a preset start-up time interval to avoid insufficient storage space due to prolonged operation.

[0038] The present invention also provides a conduit comprising a first component and a second component. The distal end of the first component has a tapered, rounded tip. Preferably, the first component is made of injection-molded plastic. The first component has a smooth outer surface. The proximal end of the first component has a rear edge, which is butt-welded to the front edge of the distal end of the second component. The first component has a hollow first inner hole. The first component comprises a cylindrical body. The first component is provided with a through hole.

[0039] The outer contour of the second component smoothly blends with the outer contour of the first component. The second component has a hollow second inner bore. The second inner bore extends axially along the second component. The second inner bore is in fluid communication with the first inner bore, i.e., fluid communication exists between the proximal end of the second component and the distal end of the first component. The proximal end of the second component is an open proximal end. Therefore, matter can enter and exit the distal end of the first component from the proximal end of the second component.

[0040] When the patient's stomach is empty, the stomach's sidewalls collapse, sealing the orifice and preventing fluid passing through the first and second components from being aspirated or delivered into the patient's body. When a vacuum is applied from the proximal end of the second component, the patient's stomach wall is drawn into close contact with the orifice, sealing it and thus preventing the aspiration process.

[0041] According to a preferred embodiment, the outer surface of the first member is provided with a set of recesses. The recesses are embedded in the outer surface of the first member. Preferably, the recesses are located adjacent to the distal end of the first member. The recesses include radial recesses and axial recesses. The axial recesses are parallel to the longitudinal axis of the first member. One end of the axial recess intersects the through-hole to form a fluid channel between the through-hole and the region along the length of the axial recess. The axial recesses extend from the through-hole in a direction away from the through-hole. The radial recesses extend at least partially around the circumference of the body of the first member on the outer surface of the first member. Preferably, the first member includes two or more recesses. Each of the radial recesses intersects with the axial recess. The axial recesses and the radial recesses form a grid array module to separate the stomach wall from the through-hole. According to a preferred embodiment, the edges and vertices of the grid array module are curved to reduce resistance at the distal end of the first member during use, allowing the distal end of the first member to slide smoothly within the patient's body, while simultaneously reducing catheter-related injury to the patient during use.

[0042] According to a preferred embodiment, the recess is constructed in an irregular shape. The recess is serpentine in shape. Preferably, the recess is a fluid channel extending away from the through-hole in a serpentine manner. Preferably, the recess is a fluid channel extending away from the through-hole in a spiral manner. Preferably, the recess includes a capillary. Multiple fluid channels are provided between the recess and the through-hole at multiple points on the outer surface of the body of the first member. Preferably, the recess extends along different directions on the surface of the first member.

[0043] The advantages of using capillary tubes are as follows: even when there is very little liquid in the environment surrounding the through-hole, the capillary tube can still effectively draw liquid into the through-hole without needing to apply a vacuum from the proximal end of the second component. Simultaneously, the capillary tube has a very small inner diameter, resulting in minimal resistance during catheter insertion or removal from the patient, reducing potential harm. Furthermore, by constructing the capillary tubes in a serpentine or spiral shape, the suction range at the distal end of the first component is increased, and each capillary tube provides an effective fluid channel between different points on the distal surface of the first component and the through-hole. The through-hole can draw liquid from different points in the environment surrounding the distal end of the first component, thus eliminating the need to align the distal end of the first component in a specific direction, reducing the difficulty of using the catheter.

[0044] This invention uses a distance detection component and an image acquisition unit to assess the status of the catheter in the stomach, enabling timely detection of any abnormalities. Medical staff can differentiate between cases where the catheter's displacement distance is unclear due to bending, based on information detected by these components. Relying solely on the distance detection component's results might mislead medical staff, making it impossible to determine the distal position of the catheter. However, with the image acquisition unit activated, the image comparison unit can confirm the distal position or direction of the catheter based on muscle tissue features within a preset standard image set. Therefore, medical staff can determine whether the catheter can still normally deliver food into the stomach, avoiding the need for additional catheter removal and insertion due to misjudgment. Reducing the number of insertions alleviates patient discomfort and minimizes harm.

[0045] In existing technologies, a distance detection unit is typically placed at the catheter's fixation point to determine if the catheter has shifted. However, this setup can lead to situations where the catheter bends inside the body without being detected at the fixation point. Such anomalies are often undetected. When the bent catheter causes harm to the patient, such as pressure on congested or eroded areas of the esophagus causing bleeding, medical staff may not be able to identify the cause promptly and accurately, delaying the patient's treatment. Furthermore, if the catheter bends undetected and feeding is administered at a normal flow rate, the resulting bend can cause further problems. The cross-section of the curved section is reduced. When liquid food flows through the curved section of the catheter, the flow rate of the liquid food increases. The flow rate of food entering the patient's stomach increases, exceeding the preset flow rate and irritating the patient's stomach, causing gastric mucosal spasm, and ultimately causing food to be vomited out of the mouth. The advantage of this invention is that it can detect when the catheter is bent in the body, and even determine the degree of catheter bending based on the displacement of the distal end of the catheter. Based on the bending of the catheter, the flow rate when the patient eats can be adjusted to be lower than the normal eating speed, avoiding the increased flow rate of liquid food entering the patient's stomach and causing gastric mucosal spasm. Preferably, when this solution determines that the catheter is bent (whether the bending is determined by the first distance detection unit or the second detection unit), based on the joint calculation of the position detection data and combined with the known length of the catheter, the degree of bending (or an estimated approximate degree) can be obtained. Based on the fluid dynamic characteristics of the current liquid food flow rate at the bending position of the catheter (based on known fluid dynamics formulas and theories), the speed at which the food is ejected from the outlet is calculated. Then, based on the image of the internal tissue of the human body at the outlet position acquired by the image acquisition device of this solution, the ejection speed and the tissue image are jointly judged according to preset rules (e.g., following the stimulation relationship table of ejection speed to tissue compiled by medical experts) to obtain a judgment conclusion on whether the current ejection speed will have an unacceptable effect on the corresponding tissue (e.g., causing gastric mucosal spasm). Based on the judgment conclusion that an unacceptable effect will occur, medical staff or automatic feeding machines can adjust the flow rate of the food to reduce the impact of food impact on the patient.

[0046] In addition, if the catheter tip is detected to be outside the stomach, such as if the catheter has dislodged from the cardia, medical staff should be notified immediately to check the catheter's condition. If necessary, the catheter should be adjusted or reinserted to ensure that food can flow normally through the catheter and to prevent food from flowing into the trachea and causing choking. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a catheter according to a preferred embodiment of the present invention;

[0048] Figure 2This is a schematic diagram of the installation of the second distance detection unit and the conduit according to a preferred embodiment of the present invention;

[0049] Figure 3 This is a simplified module connection diagram of a preferred embodiment of the anti-accidental tube removal alarm device provided by the present invention;

[0050] Figure 4 This is a stomach tissue feature map from a preset standard image set provided by a preferred embodiment of the present invention.

[0051] List of reference numerals

[0052] 100: Image acquisition unit; 200: Storage unit; 300: Distance detection component; 310: First distance detection unit; 320: Second distance detection unit; 400: Processor; 410: Analysis unit; 420: Image comparison unit; 500: Signal processing unit; 600: Alarm unit; 700: Display unit; 800: Conduit; 810: First component; 811: Through hole; 812: Recess; 812.1: Radial recess; 812.2: Axial recess; 820: Second component. Detailed Implementation

[0053] To more clearly illustrate the technical solutions of the embodiments of the present invention, a detailed description is provided below in conjunction with the accompanying drawings. It should be understood that the accompanying drawings provided by the present invention only show some embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation on the scope of protection of the present invention. In the present invention, "proximal end" refers to the end closer to the operator, and "distal end" refers to the end farther from the operator.

[0054] Example 1

[0055] During the insertion of a gastric tube, since both the trachea and esophagus originate in the pharynx, in some cases the tube may be inserted into the lungs. If the tube is located in the lungs and feeding begins, it can lead to serious medical consequences. Especially when there is a severe shortage of medical personnel, inexperienced staff often perform the intubation procedure to treat patients. To improve the success rate of tube insertion and ensure the tube reaches the correct position in the patient's stomach, this embodiment provides a catheter 800 to address this problem.

[0056] like Figure 1The catheter 800 shown includes a first component 810 and a second component 820. The first component 810 includes a cylindrical body and a rounded tip with a tapered shape. The tapered shape reduces the contact area between the catheter 800 and the patient's cavity during insertion, while the rounded tip reduces damage to the patient's mucosa when in contact with the cavity. The first component 810 is made of injection-molded plastic and has a smooth outer surface, reducing friction with the patient's contact surface and thus minimizing injury to the patient during insertion. The proximal end of the first component 810 has a posterior edge, which is welded to the anterior edge of the distal end of the second component 820. The outer contour of the second component 820 smoothly merges with the outer contour of the first component 810. The first component 810 has a hollow first inner bore. The second component 820 has a hollow second inner bore. The second inner bore extends axially along the second component 820 and is in fluid communication with the first inner bore. The second component 820 has an open proximal end, which is in fluid communication with the distal end of the first component 810. The first component 810 is provided with a through-hole 811 communicating with a first inner hole, so that substances can be transported from the proximal end of the second component 820 to the distal end of the first component 810 and enter the stomach, or a vacuum can be applied to the proximal end of the second component 820 to aspirate gastric substances. When the patient's stomach is empty, the sidewall of the stomach collapses, causing the through-hole 811 to be closed, and the fluid passing through the first component 810 and the second component 820 cannot be aspirated or transported into the patient's body. When a vacuum is applied from the proximal end of the second component 820, the patient's stomach wall is aspirated to fit tightly against the through-hole 811, sealing the through-hole 811 and thus preventing the aspiration process.

[0057] The outer surface of the first component 810 provided in this embodiment is provided with a set of recesses 812. The recesses 812 are embedded in the outer surface of the first component 810. The recesses 812 include radial recesses 812.1 and axial recesses 812.2. The axial recesses 812.2 are parallel to the longitudinal axis of the first component 810. The axial recesses 812.2 extend from the through hole 811 in a direction away from the through hole 811, and one end of the axial recesses 812.2 intersects the through hole 811 to form a fluid channel between the through hole 811 and the region in the longitudinal direction of the axial recesses 812.2. The radial recesses 812.1 extend at least partially around the body of the first component 810 on the outer surface of the first component 810. Preferably, the first component 810 includes two or more recesses 812. Each radial recess 812.1 intersects with an axial recess 812.2. The axial recess 812.2 and the radial recess 812.1 form a grid array module, giving the first member 810 multiple fluid channels in different directions. The grid array module can separate the stomach wall from the through hole 811. The edges and vertices of the grid array module are curved to reduce the resistance at the distal end of the first member 810 during use, and to allow for smoother flow of liquid in the recess 812.

[0058] According to a preferred embodiment, the recess 812 is configured in an irregular shape. The recess 812 can be configured in a serpentine shape. Preferably, the recess 812 is configured as a fluid channel extending away from the through-hole 811 in a serpentine manner. Preferably, the recess 812 is configured as a fluid channel extending away from the through-hole 811 in a spiral manner. Preferably, the recess 812 includes a capillary. The recess 812 extends in different directions on the surface of the first member 810. Multiple fluid channels are provided between multiple points on the outer surface of the body of the first member 810 and the through-hole 811. When there is only a very small amount of liquid in the environment where the through-hole 811 is located, the capillary can still effectively draw liquid into the through-hole 811 without requiring a vacuum to be applied from the proximal end of the second member 820. Meanwhile, the capillary has a very small inner diameter, resulting in minimal resistance when the catheter 800 is inserted into or removed from the patient's body, thus reducing potential harm. Furthermore, by constructing the capillary in a serpentine or spiral shape, the aspiration range at the distal end of the first component 810 is increased, and each capillary provides an effective fluid channel between different points on the distal surface of the first component 810 and the through-hole 811. The through-hole 811 can aspirate liquid from different points in the environment surrounding the distal end of the first component 810, eliminating the need to align the distal end of the first component 810 in a specific direction, thus reducing the difficulty of using the catheter 800.

[0059] When medical staff insert the catheter 800 into the patient's body, in order to determine whether the catheter 800 has been inserted into the intended position in the stomach, physiological testing methods can be used, such as aspirating the liquid in the environment where the distal end of the catheter 800 is located and performing pH testing. When the pH is ≤5.5, the diagnostic accuracy of the catheter 800 in the stomach is high, but "false positive" results may also occur, such as the reflux of gastric contents.

[0060] The catheter 800 in this embodiment includes a distance detection component 300 and an image acquisition unit 100. Preferably, the distance detection component 300 and the image acquisition unit 100 are disposed at the top end of the catheter 800. Preferably, the distance detection component 300 can be a displacement sensor. Preferably, the image acquisition unit 100 can be a miniature camera. Since acquiring images requires a large amount of storage and the miniature camera will generate heat if kept on for a long time, in this embodiment, the miniature camera has a preset start-up time interval. Preferably, the miniature camera is turned on for 2 to 5 minutes during catheter 800 insertion. The miniature camera is communicatively connected to the display unit 700. The miniature camera transmits the captured real-time images to the display unit 700 to assist medical personnel in successfully and correctly inserting the catheter 800. The displacement sensor is communicatively connected to the processor 400 to transmit displacement information to the processor 400. After the displacement sensor converts the acquired displacement information into an electrical signal, the signal processing unit 500 converts the electrical signal into distance information. The displacement sensor can help medical personnel determine whether the catheter 800 has reached the predetermined position. The Catheter 800 has a flexible structure, and if inserted too quickly, it is prone to curling or kinking, especially at the three physiological constrictions of the esophagus. The first is at the esophageal inlet, at the lower edge of the cricoid cartilage; kinking often occurs at this location. The second constriction is located where the aortic arch and left main bronchus cross the anterior wall of the esophagus. The third constriction is at the esophageal hiatus where the esophagus passes through the diaphragm, roughly at the level of the tenth thoracic vertebra. Too rapid insertion can cause the Catheter 800 to kink at the cardia. Healthcare professionals can use real-time images captured by a miniature camera to assist with insertion. When the insertion reaches a point prone to bending or kinking, the insertion speed can be slowed or adjustments made. Throughout the insertion process, healthcare professionals use real-time images captured by the miniature camera and displacement information from a displacement sensor to successfully place the Catheter 800 into the intended position in the stomach.

[0061] The beneficial effects of having a distance detection component 300 and an image acquisition unit 100 at the distal end of the catheter 800 include at least the following: Firstly, the distance detection component 300 can help medical personnel determine whether the catheter 800 has reached the predetermined position; secondly, during catheter insertion, the real-time images captured at the tip of the catheter 800 can help medical personnel determine if the tip of the catheter 800 has reached a point where it is prone to bending or kinking, allowing medical personnel to adjust the insertion speed and direction in a timely manner to avoid bending or kinking of the catheter 800 during insertion, ensuring that the catheter 800 can be used normally later and avoiding re-insertion. This device can reduce harm to patients during catheter insertion 800. During catheter insertion, medical staff can observe the condition of the patient's esophagus through captured real-time images. When there is damage to the superficial or deep tissues of the esophageal mucosa, such as inflammation caused by edema and congestion, medical staff can promptly detect the problem and adjust the insertion method of catheter 800. Therefore, the image acquisition unit 100 can provide directional guidance for catheter insertion. Medical staff can avoid damaged tissues as much as possible during insertion to reduce the patient's pain during the insertion process, minimize harm to the patient's body, and improve the success rate of catheter insertion.

[0062] Example 2

[0063] This embodiment is a further improvement on embodiment 1, and repeated content will not be described again.

[0064] like Figures 1-3The illustrated anti-accidental catheter removal alarm device includes at least a distance detection component 300, an image acquisition unit 100, a storage unit 200, a signal processing unit 500, a processor 400, an alarm unit 600, and a display unit 700. The processor 400 is equipped with an analysis unit 410 and an image comparison unit 420. Preferably, the distance detection component 300 can be a displacement sensor. Preferably, the image acquisition unit 100 can be a miniature camera. In this embodiment, the distance detection component 300 includes a first displacement sensor and a second displacement sensor. According to a preferred embodiment, the first displacement sensor and the miniature camera are disposed at the distal end of the catheter 800. The first displacement sensor can provide a displacement signal at the distal end of the catheter 800. The miniature camera can capture an image with tissue characteristics of the environment surrounding the distal end of the catheter 800. Different organs have different tissue structures. Tissue characteristics refer to the tissue structural features of a specific organ. Based on these tissue structural features, the organ type corresponding to the captured image can be determined. The environment at the distal end of the catheter 800 can be the stomach, esophagus, etc. For example, when the distal end of the catheter 800 is in the stomach, the image with tissue characteristics of the environment at the distal end of the catheter 800 is an image of the gastric mucosa layer of the stomach, in which many gastric glands can be observed. When the distal end of the catheter is in the esophagus, the image with tissue characteristics of the environment at the distal end of the catheter 800 is an image of the esophagus, in which the tissue characteristics of the esophagus are smooth muscle with an inner circular and outer longitudinal structure. The miniature camera transmits the captured image with tissue characteristics to the storage unit 200. The miniature camera acquires images of the internal tissue characteristics of the human body. The storage unit 200 saves the acquired images. The storage unit 200 is communicatively connected to the processor 400. The storage unit 200 transmits the images to the image comparison unit 420 of the processor 400. The image comparison unit 420 is equipped with a preset standard image set. The preset standard image set includes standard anatomical diagrams of different human digestive organs with structural features; for example, the preset standard image set includes images of all tissue features of the stomach, such as... Figure 4The illustrated anatomical image of the stomach shown is one of the stomach tissue feature images in a preset standard image set. The preset standard image set also includes images of all tissue features of the esophagus. The image comparison unit 420 can compare the currently acquired tissue feature image with the preset standard image set. Preferably, in this solution, the image comparison unit can directly use, for example, the method provided by the invention with publication number CN 110533117A to compare the tissue feature overlap rate of the images. The image comparison unit 420 is equipped with a verification threshold. The verification threshold is used to determine the overlap rate of the organ to which the human internal tissue feature image acquired by the image acquisition unit 100 belongs. According to a preferred embodiment, the verification threshold is set to 60%. For example, if the overlap rate of the human internal tissue feature image acquired by the image acquisition unit 100 with the stomach tissue features in the preset standard image set is greater than 60%, the processor 400 determines that the environment of the distal end of the current catheter 800 is inside the stomach. The image acquisition unit 100 acquires an image of internal human tissue features that overlaps with the tissue features of the esophagus in a preset standard image set by more than 60%. The processor 400 determines that the environment at the distal end of the catheter 800 is the esophagus. Based on this determination, the processor 400 generates a corresponding alarm command and sends it to the alarm unit 600. The processor 400 and the alarm unit 600 are communicatively connected. Upon receiving the command from the processor 400, the alarm unit 600 issues a corresponding alarm notification. Preferably, the processor 400 is communicatively connected to the nurse station's signal call system to transmit the alarm notification to the nurse station.

[0065] Based on the displacement signal acquired by the first displacement sensor and the image acquired by the miniature camera, medical personnel can determine whether the catheter 800 inside the body is in normal working order, avoiding repeated catheter insertions due to erroneous information, which could damage the patient's mucosa. Preferably, the second displacement sensor is located at a fixed position on the catheter 800. Preferably, the fixed position of the catheter 800 is located at the nasal ala. According to a preferred embodiment, the second displacement sensor is separable from the catheter 800 to accommodate catheters 800 with different insertion depths. The first displacement sensor is communicatively connected to the signal processing unit 500. The first displacement signal generated by the first displacement sensor is transmitted to the signal processing unit 500. The signal processing unit 500 converts the received first displacement signal into a first displacement. The second displacement sensor is communicatively connected to the signal processing unit 500. The second displacement signal generated by the second displacement sensor is transmitted to the signal processing unit 500. The signal processing unit 500 converts the received second displacement signal into a second displacement. The signal processing unit 500 is communicatively connected to the processor 400. The signal processing unit 500 transmits the first displacement and the second displacement to the analysis unit 410 of the processor 400. Preferably, the first distance detection unit 310 includes a first base and a first displacement sensor. Preferably, the first base can be positioned on the upper abdomen of the human body, from the center to the left side. When the first displacement sensor, located at the distal end of the catheter 800, moves, it generates a position change signal of the catheter 800 relative to the first base. The signal processing unit 500 converts the position change signal into a first displacement, which is then analyzed by the processor 400. Preferably, the second distance detection unit 320 includes a second base and a second displacement sensor. Preferably, the second base and the second displacement sensor are located at the nasal ala. Preferably, the second base is fixed at the nasal ala. When the second displacement sensor moves relative to the second base, it generates a position change signal of the catheter 800. The signal processing unit 500 converts the position change signal into a second displacement, which is then analyzed by the processor 400. The base can provide a base point position to obtain displacement information of the catheter 800 during movement. The base point position refers to the position of the base set outside the patient's body when the catheter is inserted by medical personnel to determine the displacement of the catheter 800. Specifically, the base of the first distance detection unit 310 can be positioned at the middle of the upper abdomen, corresponding to the patient's stomach. Specifically, the base of the second distance detection unit 320 can be positioned at the patient's nasal wing. Preferably, the distance detection component 300 in this solution can directly utilize, for example, the displacement sensor and sensor unit provided by the utility model with publication number CN216536497U to obtain displacement information.

[0066] The analysis unit 410 compares the received first and second displacements and generates a displacement comparison result. The image acquisition unit 100 is communicatively connected to the processor 400. The processor 400 controls the opening and closing of the miniature camera based on the distance comparison result. Preferably, the alarm unit 600 can be a sound alarm. The sound alarm issues an alarm of the corresponding level after receiving instructions from the processor 400.

[0067] According to a preferred embodiment, the alarm instructions set by the processor 400 include a first alarm instruction and a second alarm instruction. The first alarm instruction is a normal-level alarm, configured as the lowest priority for medical staff. Given a situation where the catheter 800 is bent but still within the stomach and does not affect its normal use, the processor 400 generates a first alarm instruction based on the workload of the medical staff, selecting an idle time to examine the patient's catheter. Preferably, the alarm unit 600 includes a first alarm and a second alarm.

[0068] Preferably, the first alarm command is set to issue a prompt at a first frequency. For example, the first frequency is once every 5 minutes, once every 10 minutes, or once every 15 minutes. Preferably, the first alarm command is sent to a first alarm device. Specifically, the first alarm device is a nurse station alarm, a watch worn by a nurse, or a walkie-talkie. Preferably, the alarm prompt of the first alarm device is a light signal, an sound signal, or a vibration signal. The second alarm command is a severe level alarm. The second alarm command is configured as the highest priority in the work of medical staff. Based on the situation where the catheter 800 is bent but still in the stomach, but the bending of the catheter 800 causes damage to the patient's esophagus or stomach, the processor 400 generates a second alarm command indicating that the patient is in an emergency and the doctor or medical staff needs to immediately examine or treat the patient. Preferably, the second alarm command is set to issue a prompt at a second frequency. For example, the second frequency is once every 10 seconds, once every 30 seconds, or once every minute. Preferably, the second alarm command is sent to a second alarm device. Specifically, the second alarm device is a mobile device worn by the doctor. The mobile device can be a mobile phone or a smartwatch. Preferably, the alarm prompts of the second alarm are light signals, sound signals, or vibration signals. According to a preferred embodiment, the first frequency is less than the second frequency.

[0069] There are new perspectives on the length of nasogastric tube insertion. The most reported domestic literature suggests that the insertion length of the tube should be extended based on the standard measurement, with most believing that extending the nasogastric tube length by 10cm is ideal.

[0070] When the displacement detected by the first distance detection unit 310 and / or the second distance detection unit 320 is greater than 0, the processor 400 controls the image acquisition unit 100 to turn on.

[0071] Processor 400 generates the following judgment program:

[0072] When the displacement detected by the second distance detection unit 320 remains unchanged, while the displacement detected by the first distance detection unit 310 is within a predetermined range, specifically, the predetermined range is 0-3 cm, the processor 400 generates first judgment information: the catheter 800 outside the body remains stationary, the catheter 800 in the stomach bends or moves, and the overlap rate between the human internal tissue feature image at the distal end of the catheter 800 and the tissue features of the stomach in a preset standard image set is greater than a verification threshold, specifically, the verification threshold is 60%. The processor 400 generates second judgment information: the catheter 800 bends or moves and the distal end of the catheter 800 is inside the stomach, the processor 400 sends a first alarm command to the alarm unit 600, and the alarm unit 600 issues a first alarm.

[0073] When the displacement detected by the second distance detection unit 320 remains unchanged, while the displacement detected by the first distance detection unit 310 is within a predetermined range, specifically, the predetermined range is 0–3 cm, the processor 400 generates first judgment information: the external catheter 800 remains stationary, the internal catheter 800 in the stomach bends or moves, and the overlap rate between the internal tissue feature image of the distal end of the catheter 800 and the tissue features of the stomach in a preset standard image set is greater than a verification threshold, specifically, the verification threshold is 60%. The processor 400 generates a second judgment: the catheter 800 has bent or moved and its distal end is inside the stomach; based on the human internal tissue feature image comparison unit 420 identifying red liquid or other foreign objects, the processor 400 generates a third judgment: the catheter 800 has bent, and the bending of the catheter has caused damage to the patient's esophagus or stomach, resulting in bleeding. Blood enters the stomach. If the patient's esophagus is congested or eroded, the bent portion of the catheter 800 exerts pressure on the congested or eroded area of ​​the esophagus, causing esophageal bleeding. Based on the damage to the patient's esophagus caused by the bending of the catheter 800, the processor 400 sends a second alarm command to the alarm unit 600, and the alarm unit 600 issues a second alarm. According to a preferred embodiment, the processor 400 communicates with the doctor scheduling system to obtain the doctor's work schedule. When the processor 400 generates the third judgment information, based on the consultation or surgery schedule of the resident physician / attending physician in charge of the patient, the processor 400 determines whether the resident physician / attending physician in charge of the patient has time to examine the patient immediately. If the processor 400 determines that the patient is in surgery and cannot be examined immediately, the processor 400 sends a second alarm command to another nearby resident physician / attending physician who has time. The nearby resident physician / attending physician immediately goes to the patient's ward to examine the patient and carry out corresponding treatment measures.

[0074] When the displacement detected by the second distance detection unit 320 remains unchanged, while the displacement detected by the first distance detection unit 310 exceeds the upper limit of a predetermined range, specifically, the upper limit of the predetermined range is 10 cm, the processor 400 generates first judgment information: the external catheter 800 remains stationary, the internal catheter 800 bends or moves, and the overlap rate between the image of the internal tissue features of the distal end of the catheter 800 and the tissue features of the esophagus in a preset standard image set is greater than a verification threshold, specifically, the verification threshold is 60%. The processor 400 generates second judgment information: the catheter 800 bends or moves, and the distal end of the catheter 800 dislodges from the cardia and enters the esophagus. The processor 400 sends a second alarm command to the alarm unit 600, and the alarm unit 600 issues a second alarm. Medical personnel review the images and the displacement information of the catheter 800, confirming that the distal end of the catheter 800 has dislodged from the cardia. The catheter 800 cannot continue to be used, and medical personnel need to remove and reinsert the catheter 800. Medical personnel prioritize treating patients in this situation.

[0075] When the displacement detected by the first distance detection unit 310 is equal to the displacement detected by the second distance detection unit 320, and the displacement is within a predetermined range, specifically, the predetermined range is 0-3cm, the processor 400 generates first judgment information: the catheter 800 has not bent; both the external and internal catheters 800 have moved simultaneously, and the displacement is within the predetermined range; the overlap rate between the human internal tissue feature image at the distal end of the catheter 800 and the tissue features of the stomach in the preset standard image set is greater than the verification threshold, specifically, the verification threshold is 60%. The processor 400 generates second judgment information: the distal end of the catheter 800 is inside the stomach, and the catheter 800 is in normal use. The processor 400 generates a prompt message: the catheter 800 has moved relative to the human body, which does not affect its use, but there may be a risk of it being pulled out. It is recommended that the patient or caregiver insert the catheter 800 into the body to allow for its removal.

[0076] When the displacement detected by the second distance detection unit 320 is the same as the displacement detected by the first distance detection unit 310 and the displacement exceeds the upper limit of a predetermined range, specifically, the upper limit of the predetermined range is 10cm, the processor 400 generates first judgment information: the catheter 800 has not bent, both the external and internal catheters 800 have moved simultaneously, and the displacement exceeds the upper limit of the predetermined range; the overlap rate between the image of the internal tissue features of the distal end of the catheter 800 and the tissue features of the esophagus in the preset standard image set is greater than the verification threshold, specifically, the verification threshold is 60%. The processor 400 generates second judgment information: the distal end of the catheter 800 has dislodged from the cardia and entered the esophagus, and the processor 400 sends a second alarm command to the alarm unit 600, which issues a second alarm. Medical personnel review the images and the displacement information of the catheter 800, confirming that the distal end of the catheter 800 has dislodged from the cardia. The catheter 800 cannot continue to be used, and medical personnel need to remove and reinsert the catheter 800. Medical personnel prioritize treating patients in this situation.

[0077] When the displacement detected by the first distance detection unit 310 is greater than the displacement detected by the second distance detection unit 320, and the displacement detected by the second distance detection unit 320 exceeds the upper limit of a predetermined range, specifically, the upper limit of the predetermined range is 10 cm, the processor 400 generates first judgment information: the catheter 800 in the body has bent or moved, and the displacement exceeds the upper limit of the predetermined range; the overlap rate between the human internal tissue feature image at the distal end of the catheter 800 and the tissue features of the esophagus in the preset standard image set is greater than a verification threshold, specifically, the verification threshold is 60%. The processor 400 generates a second judgment: if the catheter 800 bends or moves and the distal end of the catheter 800 dislodges from the cardia and enters the esophagus, the processor 400 sends a second alarm command to the alarm unit 600, the alarm unit 600 issues a second alarm, and the medical staff reviews the images and catheter 800 displacement information to confirm that the distal end of the catheter 800 has dislodged from the cardia. The catheter 800 can no longer be used, and the medical staff needs to remove the catheter 800 and reinsert it. The medical staff should prioritize treating patients in this situation.

[0078] This embodiment uses a distance detection component 300 and an image acquisition unit 100 to assess the position of the catheter 800 in the stomach, enabling timely detection of any abnormalities. Medical personnel can differentiate between situations where the catheter 800's displacement distance is unclear due to bending, based on the information detected by the distance detection component 300 and the image acquisition unit 100. Relying solely on the results of the distance detection component 300 might mislead medical personnel, making it impossible to determine the distal position of the catheter 800. However, with the image acquisition unit 100 activated, the image comparison unit 420 can confirm the position of the catheter 800 based on tissue features from a preset standard image set. The distal location or direction of the catheter allows medical staff to determine whether the current catheter 800 can still normally flow food into the stomach, avoiding the need for additional extubation and insertion due to misjudgment. Reducing the number of insertions can alleviate patient discomfort and harm. Furthermore, if the catheter tip is detected not in the stomach, such as when the catheter 800 dislodges from the cardia, medical staff can be notified immediately to check the catheter 800's condition. If necessary, the catheter 800 can be adjusted or reinserted to ensure normal food flow and prevent food from entering the trachea and causing choking.

[0079] Example 3

[0080] This embodiment is a further improvement on embodiment 2, and the repeated content will not be described again.

[0081] Medical staff set the working time of the image acquisition unit 100 via the processor 400. The image acquisition unit 100 is a miniature camera. The miniature camera captures images from at least one perspective. This embodiment addresses the issue that the catheter 800 may be pulled out when the patient moves or the device is moved. Due to the flexible structure of the catheter 800, bending can lead to an unclear displacement distance, misleading medical staff and making it impossible to determine the distal position of the catheter 800. When the distance detection component 300 detects a change in displacement, the miniature camera activates, and the image comparison unit 420 can confirm the distal position based on identified muscle tissue features, allowing medical staff to determine whether the catheter 800 can still normally allow food to flow into the stomach without causing food to flow into the trachea and cause choking. In this embodiment, the insertion status of the catheter 800 can be determined by the image acquisition unit 100 and the distance detection component 300 to promptly detect any abnormalities in the catheter 800. The miniature camera has a preset activation time interval to avoid insufficient storage space due to prolonged operation. According to a preferred embodiment, the activation time of the miniature camera coincides with the time of eating or administering medication. It is essential to check whether the catheter 800 is in normal working order before the patient eats or receives medication, as the fluid channel of the catheter 800 cannot function when it is removed from the patient's stomach. For example, if the patient eats every 3 hours, the miniature camera is activated every 3 hours to acquire images of stomach tissue features.

[0082] It should be noted that the generated judgment information is only an auxiliary judgment for medical staff, and the operational conclusion needs to be determined by medical staff based on the actual examination situation. After receiving the alarm prompt, medical staff can view the acquired image on the monitor and judge whether the catheter 800 is in normal use based on the image. If the medical staff judges that the catheter 800 is in normal use, the patient can be fed or given medication; if the medical staff judges that the catheter 800 is in a folded state, the catheter 800 needs to be removed and reinserted.

[0083] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of this invention is defined by the claims and their equivalents. This specification contains multiple inventive concepts; terms such as "preferredly," "according to a preferred embodiment," or "optionally" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept. Throughout the text, features introduced by "preferredly" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. An alarm device for preventing accidental pipe pulling, comprising: An image acquisition unit (100) is disposed at the distal end of the catheter (800) and is configured to acquire an image of the internal tissue features of the human body at the location of the distal end of the catheter (800). The image of the internal tissue features is an image of the tissue structure features of the tissues or organs that the catheter (800) passes through as it enters the human body, captured by the image acquisition unit (100). The distance detection component (300) includes at least a first distance detection unit (310) disposed at the distal end of the catheter (800) and a second distance detection unit (320) disposed at the proximal end of the catheter (800), and the distance detection component (300) is configured to acquire displacement information of the catheter (800) through the first distance detection unit (310) and / or the second distance detection unit (320); And a processor (400), which is communicatively connected to the image acquisition unit (100) and the distance detection component (300), respectively; The processor (400) is characterized in that it is configured to: Based on the displacement information related to the positional change of the catheter (800) provided by the first distance detection unit (310) and / or the second distance detection unit (320), and the overlap rate between the image of the internal tissue features of the distal end of the catheter (800) provided by the image acquisition unit (100) and the tissue features of a preset standard image set, the shape change and / or change in the usage status of the catheter (800) are determined. The preset standard image set includes at least a standard anatomical diagram of the stomach with gastric tissue structure features and a standard anatomical diagram of the esophagus with esophageal tissue structure features. When the displacement detected by the second distance detection unit (320) remains unchanged, while the displacement detected by the first distance detection unit (310) is within a predetermined range, the overlap rate between the human internal tissue feature image at the distal end of the catheter (800) and the tissue feature of the designated organ in the preset standard image set is greater than the verification threshold, and the human internal tissue feature image identifies abnormal gastric contents, the processor determines that the distal end of the catheter (800) is in the designated organ, and the bending of the catheter (800) causes damage to the patient's esophagus or stomach.

2. The apparatus according to claim 1, characterized in that, The processor (400) is configured to: determine that the distal end of the catheter (800) has dislodged from the designated organ when the displacement detected by the second distance detection unit (320) is the same as the displacement detected by the first distance detection unit (310) and the displacement exceeds the upper limit of a predetermined range, and the overlap rate between the human internal tissue feature image at the distal end of the catheter (800) and the tissue feature of a non-designated organ in a preset standard image set is greater than the verification threshold.

3. The apparatus according to claim 2, characterized in that, The processor (400) is configured to: determine that the catheter (800) has bent or moved in the body and that the distal end of the catheter (800) has dislodged from the designated organ when the displacement detected by the first distance detection unit (310) is greater than the displacement detected by the second distance detection unit (320) and the displacement detected by the second distance detection unit (320) exceeds the upper limit of a preset range, and the overlap rate between the human internal tissue feature image of the distal end of the catheter (800) and the tissue feature of a non-designated organ in the preset standard image set is greater than the verification threshold.

4. The apparatus according to claim 3, characterized in that, The designated organ is the organ into which the catheter (800) is inserted at the distal end, and into which the catheter (800) can function normally.

5. The apparatus according to claim 4, characterized in that, The verification threshold is a critical value used to determine the overlap rate of the organ type to which the human internal tissue feature image belongs.

6. The apparatus according to claim 5, characterized in that, The verification threshold is set to 60%–80%.

Images