Displacement monitoring system of breathing machine catheter and limiting assembly of displacement monitoring system

Abstract

The invention relates to a displacement monitoring system of a breathing machine catheter and a limiting assembly thereof, the displacement monitoring system comprises the limiting assembly arranged on a catheter part, the limiting assembly comprises a bite block part and a processor, and the bite block part monitors displacement information of the catheter part in a mode of collecting scale changes of the catheter part based on light detection changes; the first end of the catheter part is provided with a filter film printed with scale marks; the filter film is arranged according to the mode that the transmissivity of different scale positions to light is different; the bite block part comprises a displacement detection assembly, and the displacement detection assembly collects the reflected light intensity of the catheter part to the detection light of the displacement detection assembly in the mode of being close to the scale marks of the catheter part so as to determine the change of the scales; when the catheter part displaces, the light intensity and / or the infrared wavelength band of the infrared light collected by the displacement detection assembly are / is changed, and the processor can confirm the change of the scale marks in time according to the change of the infrared light, so that the current position of the scale marks of the catheter part and the displacement distance are confirmed.

Description

[0001] The original basis of the divisional application is a patent application with the application number 202310586146.8, the application date of May 23, 2023, and the invention name of a breathing assistance system. TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, in particular to a displacement monitoring system for a breathing machine catheter and a limiting assembly thereof. BACKGROUND

[0003] Tracheal intubation is a method of placing a specially designed tracheal catheter through the oral or nasal cavity, through the glottis, into the tracheal respiratory tract, to provide the best conditions for airway patency, ventilation and oxygen supply, and respiratory tract suction, and is an important measure for rescuing patients with respiratory dysfunction. Most of the tracheal intubation fixation devices used in clinical practice are traditional dental pads + elastic band (or adhesive tape) winding combination devices. The dental pad is mostly made of hard material, which can prevent the patient from biting the tube and causing the catheter to close and fail to ventilate, and the elastic band or adhesive tape can fix the catheter and the dental pad. After tracheal intubation is completed, the elastic band or adhesive tape is used to wrap and fix the tracheal catheter and the dental pad on one side of the mouth corner. However, the existing technology has the following defects:

[0004] Due to the operation method of medical personnel or the patient's own factors, the traditional fixation device may have two possible accidental falling situations, one of which is the displacement of the tracheal catheter due to poor stability between the tracheal catheter and the dental pad, and the other is the disconnection of the device from the patient's mouth due to the loosening of the elastic band or adhesive tape and the patient's face and neck. In particular, for prone ventilation, the fixation device used in this way is less stable than supine ventilation due to gravity, and medical personnel cannot always pay attention to the tracheal intubation status of the patient. If it is not discovered in time, it not only affects the normal treatment of the patient, but also threatens the life safety of the patient.

[0005] For example, the patent with the publication number CN113082425A discloses a pre-warning anti-falling tracheal intubation fixator, which includes a silica gel pad, a wearing mechanism, a fixing sleeve, a moving mechanism, a screw pin, an alarm mechanism, a control mechanism, and an activation mechanism. The right side of the silica gel pad is provided with a wearing mechanism at the upper and lower ends, the left side of the silica gel pad is fixed with a fixing sleeve at the middle end, the fixing sleeve is internally provided with a moving mechanism, the moving mechanism is externally provided with a screw pin at the upper and lower ends of the left side, the fixing sleeve is externally provided with an alarm mechanism, the fixing sleeve is internally provided with a control mechanism at the lower end, and the moving mechanism is externally provided with an activation mechanism at the right lower end. Although this fixation device can achieve early warning, it has the following defects: in the case of a prone position, such a fixation device is large and heavy, and the ventilation effect is poor due to the influence of gravity.

[0006] The application aims to provide a tracheal tube fixing device with high early warning efficiency, comfort, safety and good ventilation effect.

[0007] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, a large number of literatures and patents have been studied by the applicant when making the application, but due to the limitation of space, all the details and contents have not been listed in detail, but this does not mean that the application does not have these characteristics of the prior art, on the contrary, the application has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art in the background art. SUMMARY

[0008] In view of the deficiencies of the prior art, the application provides a breathing assistance system, which at least comprises a breathing machine body and a trachea, and at least a limiting assembly is arranged on the trachea, the limiting assembly at least comprises a bite block part, an image acquisition assembly and a processor; the bite block part and the image acquisition assembly are connected with the processor in a wired and / or wireless manner; the bite block part monitors the displacement information of the catheter part in a manner of acquiring the scale change of the catheter part based on the change of light detection; the image acquisition assembly is arranged at the first end of the catheter part entering the laryngopharynx, and acquires the respiratory tract feature image of the position where the first end of the catheter part is located; the processor is configured to judge the position change and / or the shape change of the first end of the catheter part based on the received displacement information and the respiratory tract feature image.

[0009] The application simultaneously monitors the insertion depth of the catheter part and the respiratory tract feature through the processor, and comprehensively judges whether the displacement of the catheter part exceeds the threshold value, so that the situation adverse to the patient can be timely and accurately transmitted to the terminal of the medical staff in real time, so that the medical staff can timely adjust the insertion depth of the catheter part, and the safety of the patient is improved.

[0010] Preferably, the processor is further configured to compare the received respiratory tract feature image with a standard image set and calculate a feature coincidence rate, and judge whether to send a warning information based on the feature coincidence rate and the displacement information.

[0011] The application judges whether the insertion depth and the shape of the catheter part are appropriate by comparing the respiratory tract feature image with the standard image set, so as to avoid the respiratory tract of the patient being blocked.

[0012] Preferably, the bite block part at least comprises a communication assembly and at least one displacement detection assembly, the communication assembly is connected with the displacement detection assembly, and the displacement detection assembly acquires the reflection light intensity of the light detected by the catheter part to determine the change of the scale in a manner close to the scale line of the catheter part. The displacement of the catheter part is determined by the light detection, so that the effect of accurately judging the displacement of the catheter part without affecting the movement of the catheter part is realized.

[0013] Preferably, in the case that the communication assembly is not movable along the radial direction of the fitting part, the shape of the displacement detection assembly is configured in a manner capable of limiting the radial movement range of the catheter part, so that the radial distance between the displacement detection assembly and the scale line of the catheter part changes within a preset range.

[0014] The catheter part is limited by the displacement detection assembly, so that the catheter part cannot move in a large range, thereby improving the accuracy of the displacement detection assembly in detecting the scale change and avoiding deviation in displacement detection due to the movement angle of the catheter part.

[0015] Preferably, the dental pad part further comprises a support assembly, and the communication assembly and the support assembly are arranged in a manner of being connected to each other and penetrating the fitting part at two sides of the fitting part, respectively, and the communication assembly and the support assembly combine to form a pipe body having at least one channel, so that oral secretions can be discharged by the communication assembly and the support assembly.

[0016] The communication assembly and the support assembly combine to form a pipe body having at least one channel, which can be used to discharge secretions in the oral cavity and prevent the secretions from further blocking the respiratory tract.

[0017] Preferably, the pipe body formed by the combination of the communication assembly and the support assembly is arranged in a manner of being parallel to the axis of the catheter part. In this way, the two pipes do not affect each other, and the discharge of secretions is smooth.

[0018] Preferably, the scale line is arranged at the second end of the catheter part which does not enter the throat part, and the catheter part penetrates the fitting part so that the first end and the second end thereof are distributed at two sides of the fitting part. In this way, the movement of the catheter part can be monitored.

[0019] Preferably, at least one light filtering film is arranged on the scale line, and the light filtering film is arranged in a manner that the transmittance of light at different scale positions is different. In this way, the change of the scale line is determined based on the difference in light transmittance, which is convenient and fast.

[0020] Preferably, the fitting part further comprises at least one fixing assembly, and the at least one fixing assembly is used to relatively fix the fitting part and the head part when the fitting part and the dental pad part are worn. In this way, the fitting part is prevented from moving, and the harm to the respiratory tract caused by the movement of the catheter part is also avoided.

[0021] The application also provides a trachea limiting assembly of a breathing assistance system, which comprises at least a catheter part, a mouthpiece part, an image acquisition assembly and a processor; the mouthpiece part and the image acquisition assembly are connected to the processor in a wired and / or wireless manner; the mouthpiece part monitors displacement information of the catheter part in a manner of acquiring scale changes of the catheter part based on light detection changes; the image acquisition assembly is arranged at a first end of the catheter part entering the laryngopharynx, and acquires a respiratory tract feature image of a position where the first end of the catheter part is located; and the processor is configured to judge position changes and / or shape changes of the first end of the catheter part based on the received displacement information and the respiratory tract feature image.

[0022] The trachea limiting assembly of the application can determine the relative position of the tracheal tube inserted into the trachea of the patient based on the scale marked on the outer wall of the catheter part, avoids the tracheal tube being inserted too deep or too shallow, ensures the ventilation effect and stability of the patient, and avoids the interference of the gases and oral secretions exhaled by the patient which are different from the ambient temperature and humidity on the detection results due to the good performance of the light filter film under different ambient temperature and humidity. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of a simplified module of the trachea limiting assembly of a preferred embodiment provided by the application;

[0024] Figure 2 FIG. 2 is a structural schematic diagram of another angle of the simplified module of the trachea limiting assembly of the preferred embodiment provided by the application.

[0025] LIST OF REFERENCE NUMERALS

[0026] 100: catheter part; 200: mouthpiece part; 300: fitting part; 101: scale line; 201: communication assembly; 202: displacement detection assembly; 203: support assembly; 204: elastic soft silica gel layer; 301: fixing assembly; 400: image acquisition assembly; 500: processor. DETAILED DESCRIPTION

[0027] The application will be described in detail below with reference to the accompanying drawings.

[0028] The main pathophysiological mechanism of prone position ventilation is to significantly improve the ventilation / blood flow ratio of the patient, improve the oxygenation of the patient, promote the re-expansion of collapsed alveoli, improve the respiratory system compliance, and facilitate the drainage of deep sputum.

[0029] Due to the operation method of medical staff or patient's own factors, there are two possible accidental falling situations of the traditional ventilator trachea, one is the displacement of the trachea caused by the poor stability of the connection between the trachea and the dental pad, and the other is the situation that the device is separated from the patient's mouth caused by the loosening of the elastic band or adhesive tape and the patient's face and neck. Especially for prone ventilation, the trachea in this way is less stable due to gravity, and medical staff cannot always pay attention to the trachea intubation status of the patient. Without timely discovery, the trachea of the ventilator not only affects the normal treatment of the patient, but also threatens the life safety of the patient.

[0030] For the prior art, the present application provides a breathing assistance system capable of timely warning and monitoring the ventilation condition, especially a prone position ventilation trachea limiting assembly, as shown in Figure 1 and Figure 2 .

[0031] The present application can also provide a displacement monitoring system and alarm system for the trachea of the ventilator. The present application can also be a recording system for recording the displacement of the trachea in the respiratory tract during the ventilation process, so as to serve as medical evidence for medical accident responsibility identification in the case of medical disputes. In general treatment process, due to less recording of ventilation process, it is difficult to clearly determine the medical responsibility in the case of medical disputes, resulting in additional liability of medical system and medical staff. The present application can clearly record the displacement of the trachea and the movement in the respiratory tract, and can record the deformation state of the trachea and the characteristics of the respiratory tract, so as to realize the recording of the ventilation process and the responsibility identification of the medical accident, and avoid unnecessary responsibility of the medical system and the medical staff.

[0032] The breathing assistance system of the present application at least comprises a ventilator body and a trachea. The trachea is provided with a limiting assembly, as shown in Figure 1 The limiting assembly at least comprises a dental pad part 200, an image acquisition assembly 400 and a processor 500. The dental pad part 200 and the image acquisition assembly 400 are connected with the processor 500 in wired and / or wireless manner. The dental pad part 200 monitors the displacement information of the trachea part 100 in the way of acquiring the scale change of the trachea part 100 based on the change of light detection; the image acquisition assembly 400 is arranged at the first end of the trachea part 100 entering the throat, and acquires the respiratory tract feature image of the position where the first end of the trachea part 100 is located; the processor 500 is configured to judge the position change and / or shape change of the first end of the trachea part 100 based on the received displacement information and respiratory tract feature image.

[0033] The present application simultaneously monitors the catheter part 100 insertion depth and the respiratory tract features through the processor 500, and comprehensively judges whether the displacement of the catheter part 100 exceeds the threshold value, which can timely and accurately transmit the real-time situation unfavorable to the patient to the terminal of the medical staff, so that the medical staff can timely adjust the insertion depth of the catheter part 100, and improve the safety of the patient.

[0034] The limiting assembly of the present application can determine the relative position of the tracheal tube inserted into the trachea of the patient based on the scale marked on the outer wall of the catheter part 100, which avoids the tracheal tube being inserted too deep or too shallow, and ensures the effect and stability of the ventilation of the patient. At the same time, the light filter has the characteristics of maintaining good performance under different environmental temperatures and humidities, so it can also avoid the interference of the gases and oral secretions exhaled by the patient which are different from the environmental temperature and humidity on the detection results.

[0035] As shown in Figure 1 The catheter part 100 is used to build a channel for the patient's respiratory tract to communicate with the outside. The catheter part 100 can be various types of pipes that meet the requirements of medical devices. Preferably, the catheter part 100 is a silica gel pipe, which has the characteristics of being soft, slightly deformable and recoverable, and is not easy to damage the oral tissues of the patient.

[0036] The first end of the catheter part 100 inserted into the respiratory tract is provided with a miniature image acquisition assembly 400. The image acquisition assembly 400 is arranged in a way that does not block the ventilation channel of the catheter part 100. For example, the image acquisition assembly 400 is arranged at the first end of the catheter part 100, and a plurality of ventilation holes are arranged around the image acquisition assembly 400. Preferably, the positions of the image acquisition assembly 400 except the camera lens are wrapped with a flexible layer to avoid damage to the respiratory tract by the image acquisition assembly 400.

[0037] The miniature image acquisition assembly 400, for example, is a miniature camera, which is used to acquire the image of the respiratory tract features. The image acquisition assembly 400 is in wired and / or wireless communication connection with the processor 500.

[0038] The image acquisition assembly 400 is used to acquire the image of the tissue structure of the respiratory tract.

[0039] Preferably, the second end of the catheter part 100 is marked with a scale line 101. The scale line 101 is used to reflect the length of the catheter part 100 inserted into the respiratory tract of the patient, so as to avoid the catheter part 100 being inserted too deeply into the respiratory tract, and also avoid the length of the catheter part 100 inserted into the respiratory tract being insufficient.

[0040] Preferably, the catheter part 100 is preferably a transparent pipe. Alternatively, the first end of the catheter part 100 is provided as a transparent section. The first end of the catheter part 100 is provided with at least one layer of light filter film marked with printed scale line 101.

[0041] Preferably, the light filtering film is arranged in a manner that the transmittance of the light rays is different at different scale positions. Preferably, the thickness of the light filtering film is different at different scale lines 101.

[0042] Preferably, the light filtering film is not a uniform light filtering film, and in a certain direction, the reflectivity and / or reflection wave band of the light signal reflected by the light filtering film presents a regular increase or decrease. For example, from scale line 1 to scale line 5, the reflectivity of the light filtering film gradually increases. Or, from scale line 1 to scale line 5, the reflectivity of the light filtering film gradually decreases. The different thicknesses of the light filtering film result in different reflectivity and / or reflection wave band of the light filtering film. Therefore, the present application adjusts and changes the thickness of the light filtering film to make the light filtering film and the light collecting assembly cooperate with each other to monitor the displacement of the catheter portion 100.

[0043] Preferably, the light filtering film is, for example, a multilayer structured light thermal film. The film has high transmittance in the visible light wave band and high reflectivity in the infrared wave band, and the film layer has good stability in a high-temperature and humid environment. The present application can adjust the range of the high-transmittance wave band by changing the thickness of each film layer according to the determined scale change direction, so as to realize different light reflectivity and different light wave band range.

[0044] The light filtering film includes at least two layers of dielectric materials with different refractive indexes. Three materials are represented by A, B and C, respectively, and the dielectric materials can be A and B, or A and B and C. The number of layers is 2-1000 layers, and the dielectric materials with different refractive indexes are superimposed on each other to form a laminated structure. If two materials are represented by A and B, then the light filtering film layer structure can be, for example, AB, ABA, ABAB, ABABA, ABABAB, ABABABA, BABABA, ABCBABCBA, ACABACBC, etc., and each layer has a thickness of 0.1-10000 nm, such as 0.1 nm, 1 nm, 1.1 nm, 23.4 nm, 200 nm, 500 nm or 10000 nm.

[0045] The two dielectric materials with different refractive indexes can be high-refractive-index dielectric materials or low-refractive-index dielectric materials. The high-refractive-index materials are preferably TiO2, ZrO2, Ta2O5, HfO2, ZnS, LiNbO3, etc., and the low-refractive-index materials are preferably Al2O3, SiO2, MgO, MgF2, CaF2, etc. Preferably, the high-refractive-index material is TiO2, and the low-refractive-index material is Al2O3.

[0046] For example, the filter film is good at blocking infrared band in light. For the visible light, the filter film can reflect most of the infrared light. When the thickness of the filter film corresponding to each scale line 101 or scale segment is different, or the number of layers is different, the reflectivity or reflection band of the reflected infrared light will be different. For example, the first scale segment reflects high for infrared light above 780 nm. With the change of film thickness or the change of the number of layers, the reflectivity of the filter film to infrared light will be different.

[0047] Preferably, the scale line 101 on the filter film of the catheter part 100 of the present application not only has the function of identifying the first end, but also has the function of identifying the collection position and the collection angle. In the case where the catheter part 100 is separated from the fitting part 300, the scale line 101 helps the medical staff to identify the inserted second end and the non-inserted first end, avoiding the installation error of the medical staff.

[0048] Preferably, the scale line 101 is arranged at the second end of the catheter part 100 which does not enter the throat part. The catheter part 100 penetrates the fitting part 300 so that the first end and the second end thereof are distributed on both sides of the fitting part 300. In this way, the movement of the catheter part 100 can be monitored.

[0049] The fitting part 300 is arranged at the lip position of the patient during use, and is used to fix the catheter part 100 and the bite block part 200. The fitting part 300 can be made of silicone material or fabric material. The fitting part 300 is a soft sheet body, so it can be conveniently attached to the face and lip position of the patient. Preferably, the inner side of the fitting part 300 which contacts the lip can be provided with an anti-slip layer, such as a soft silicone layer, to prevent the fitting part 300 from moving and to facilitate the fixation of the fitting part 300. Preferably, the anti-slip layer is arranged on part of the side surface of the fitting part 300, which facilitates the movement and positioning of the fitting part 300 during initial setting. Furthermore, the fitting part 300 attached to the lip position of the patient during use can prevent foreign matter in the external air from entering the oral cavity of the patient, thereby improving safety and comfort.

[0050] The bite block part 200 is used to be placed between the upper and lower molars of the patient to support the bite of the patient. The bite block part 200 at least includes a communication assembly 201 and at least one displacement detection assembly 202. The number of displacement detection assemblies 202 can be one, two or even more, which is set according to the needs. The communication assembly 201 is arranged at the outer side of the fitting part 300 which does not face the lip of the patient.

[0051] The communication assembly 201 is connected with the displacement detection assembly 202. The connection manner is not limited, which can be mechanical connection, adhesive connection or connection through a connecting piece. The communication assembly 201 is preferably a hollow pipe. The displacement detection assembly 202 at least includes a light emitting assembly and a light collecting assembly. The light emitting assembly is used for emitting visible light and / or infrared light. The light emitting assembly is, for example, various types of micro LED lamp beads. The light collecting assembly is used for collecting the intensity and / or reflection wave band of the light reflected by the light filter. The light collecting assembly at least includes a photoelectric converter and an infrared light receiver. The number of the infrared light receiver is one, two or even more. The light receiver is connected with the photoelectric converter to send the received infrared reflection signal to the photoelectric converter. The photoelectric converter converts the received infrared reflection signal into an electric signal. The photoelectric converter is connected with the processor 500 in a wired and / or wireless manner, so as to send the electric signal to the processor 500. Preferably, the plurality of infrared light receivers are distributed in a fan shape around the light filter, and since the light filter on the catheter part 100 is distributed in a curved surface, the reflected infrared light is radiated. Therefore, the infrared light can be collected more. The fan-shaped distribution of the infrared light receiver can receive as much infrared light as possible, and improve the judgment accuracy of the intensity of the infrared light.

[0052] Preferably, the processor 500 is a special integrated chip, a server, a single-chip microcomputer and / or a logic processor capable of processing the received electric signal and image respectively and obtaining a judgment result. Preferably, the processor 500 further includes a memory for storing the processing data of the processor 500. Preferably, the execution processing step of the processor 500 is the step of the judgment method of the present application for the coincidence rate of the respiratory tract feature image and the standard image set and the displacement of the catheter part 100.

[0053] Preferably, in the case that the communication assembly 201 is not movable along the radial direction of the fitting part 300, the shape of the displacement detection assembly 202 is set in a manner capable of limiting the radial movement range of the catheter part 100, so that the radial distance between the displacement detection assembly 202 and the scale line 101 of the catheter part 100 changes within a preset range.

[0054] Preferably, the displacement detection assembly 202 is provided with a bracket. The bracket is an annular bracket structure or an arc-shaped bracket structure close to annular in the Figure 1 The light emitting assembly and the light collecting assembly are arranged on the side of the bracket facing the scale line 101 of the catheter part 100. The bracket is arranged in a structure close to annular, which not only can better collect the reflected infrared light, but also can limit the movement range of the catheter part 100, so that the catheter part 100 will not be greatly inclined, thereby avoiding the inclined damage of the catheter part 100 to the respiratory tract, and also avoiding that the ventilation hole of the first end of the catheter part 100 is blocked by the wall of the respiratory tract.

[0055] The displacement detection component 202 collects the reflected light intensity of the light detected by the catheter part 100 to determine the change of the scale by approaching the scale line 101 of the catheter part 100. The present application determines the displacement of the catheter part 100 by light detection, which realizes the effect of accurately determining the displacement of the catheter part 100 without affecting the movement of the catheter part 100.

[0056] For example, the displacement detection component 202 is arranged in the scale range of the scale line 101. That is, the displacement detection component 202 is arranged in the reflection range of the light filter film. When the catheter part 100 is displaced, the light intensity and / or the infrared wavelength range of the infrared light collected by the displacement detection component 202 changes, so that the processor 500 can timely confirm the change of the scale line 101 according to the change of the infrared light, that is, can confirm the current scale line position of the catheter part 100 and the displacement distance. Preferably, the processor 500 stores a preset displacement threshold. When the displacement distance of the catheter part 100 exceeds the displacement threshold, the processor 500 can realize the early warning in the form of sound, light, electricity and their combination through the connected at least one alarm.

[0057] The displacement detection component limits the displacement of the catheter part 100, so that the catheter part 100 cannot move in a large range, thereby improving the accuracy of the displacement detection component 202 in detecting the change of the scale, and avoiding the deviation of the displacement detection due to the movement angle of the catheter part 100.

[0058] Preferably, the collection period of the displacement detection component 202 is not constant. The collection period of the displacement detection component 202 is set by the processor 500. The collection period of the displacement detection component 202 is based on the displacement frequency of the catheter part 100 to shorten from the original collection period. That is, when the displacement does not exceed the displacement threshold, the displacement frequency of the catheter part 100 increases, and then the collection period of the displacement detection component 202 is shortened correspondingly. By such arrangement, the unnecessary data collection frequency of the displacement detection component 202 can be reduced, the data processing amount of the communication component 201 can be reduced, and the early warning of the displacement of the catheter part 100 can be avoided.

[0059] For example, the preset original acquisition cycle of the displacement detection component 202 is 3S / time. The displacement threshold is set to 0.5cm. After the displacement detection component 202 sends the acquired readable data to the processor 500, the processor 500 determines that the catheter part 100 has a first displacement based on the scale line data of the initial state. The displacement is ±L. In the case that L is less than the displacement threshold, the processor 500 shortens the acquisition cycle by 1S, so that the acquisition cycle is changed to 2S / time. Similarly, after the displacement detection component 202 sends the acquired readable data to the processor 500, the processor 500 determines that the catheter part 100 has a second displacement based on the scale line data of the initial state. In the case that L is less than the displacement threshold, the processor 500 shortens the acquisition cycle by 1S, so that the acquisition cycle is changed to 2S / time. In the case that L is greater than the displacement threshold, the processor 500 controls the alarm to issue a warning information. In this way, the more the displacement times, the shorter the acquisition cycle, and the less likely to miss the critical warning moment of the catheter part 100.

[0060] In the case that the patient is ventilated in a prone position, the catheter part 100 can fall off from the respiratory tract due to the influence of the patient's body position or the surrounding environment, therefore, the processor 500 of the present application changes the acquisition cycle in the manner of displacement times as the driving time, which can not only reduce the processing amount of invalid data of the processor 500, but also improve the accuracy of the warning, realize effective warning, and avoid the patient from being in danger.

[0061] Preferably, the dental pad part 200 further comprises a support component 203. The communication component 201 and the support component 203 are arranged in a manner that they are connected to each other and penetrate the fitting part 300 on both sides of the fitting part 300 respectively, and the communication component 201 and the support component 203 combine to form a tube body with at least one channel, so that the oral cavity secretion can be discharged by the communication component 201 and the support component 203. Preferably, the communication component 201 and the support component 203 can be integrally arranged.

[0062] For example, the communication component 201 is arranged on both the inner and outer sides of the fitting part 300 in a manner that the positions of the communication component 201 and the support component 203 can be opposite to each other. Among them, the support component 203 is arranged on the inner side of the fitting part 300 facing the patient's lips.

[0063] The combination of the communication component 201 and the support component 203 forms a tube body with at least one channel, which can be used to discharge the secretion in the oral cavity and prevent the secretion from further blocking the respiratory tract. Specifically, the inside of the support component 203 is provided with at least one channel parallel to the catheter part 100. That is, the number of channels is not limited to one, but can also be two or even more. The components of the support component 203 are not limited to cylindrical, tube body, but also to irregular shapes that conform to the structure of the oral cavity, as long as the shapes that can facilitate the patient's occlusion belong to the preferred embodiments of the present application. Figure 1The hollow tube body of the support assembly 203 is provided to simply demonstrate the principle of the present application.

[0064] Preferably, the tube body formed by the combination of the communication assembly 201 and the support assembly 203 is arranged in parallel with the catheter portion 100 along the axis. In this way, the two tubes do not affect each other, and the secretion can be smoothly discharged.

[0065] Preferably, the support assembly 203 has a cylindrical structure as a whole. Preferably, the middle part of the support assembly 203 is provided with at least one first channel for suction of sputum if necessary. The communication assembly 201 is provided with at least one second channel. The first channel and the second channel are in communication. The number of the first channel and the second channel is not limited to one, but can be two or three. Preferably, the second channel of the communication assembly 201 has a horn shape with a gradually increasing radius along the axis. The radius increases with the distance from the lip portion. In this way, the pressure inside the mouth of the lip portion is greater than the pressure outside the lip portion, so that the flow rate of the fluid gradually increases with the increase of the radius, which is beneficial to the rapid flow of sputum and oral fluid.

[0066] Preferably, the fitting portion 300 further comprises at least one fixing assembly 301. When the fitting portion 300 and the dental pad portion 200 are worn, the at least one fixing assembly 301 is used to fix the fitting portion 300 relative to the head. In this way, the displacement of the fitting portion 300 is avoided, and the harm caused by the displacement of the catheter portion 100 to the respiratory tract is also avoided.

[0067] Preferably, the fixing assembly 301 is preferably at least one elastic fixing belt, as shown in Figure 2 After the fitting portion 300 and the catheter portion 100 are inserted into the respiratory tract, the elastic fixing belt is tied or fastened on the head of the patient to avoid displacement of the fitting portion 300.

[0068] During the ventilation treatment of the patient, it is unscientific to give an early warning only by the displacement information of the catheter portion 100. The respiratory tract structures of different patients are different. Sometimes, although the displacement of the catheter portion exceeds the displacement threshold, it does not affect the breathing of the patient and does not cause damage to the respiratory tract. At this time, the early warning is invalid, which disperses the attention of the medical staff and increases the invalid work of the medical staff to adjust the catheter portion 100.

[0069] Therefore, the processor 500 is further configured to compare the received respiratory tract feature image with a standard image set and calculate a feature coincidence rate, and determine whether to send an early warning information based on the feature coincidence rate and the displacement information of the catheter portion 100.

[0070] The standard image set is stored in the processor 500 or a memory connected to the processor 500, so as to be called by the processor 500 at any time.

[0071] The processor 500 is preset with a coincidence rate threshold. The coincidence rate refers to a numerical value of the similarity between the collected respiratory tract feature and the standard image set.

[0072] Table 1 monitoring situation

[0073]

[0074] The monitoring situation is shown in Table 1.

[0075] The first kind: in the case that the coincidence rate of the respiratory tract feature does not exceed the coincidence rate threshold, if the catheter part 100 only moves away from the respiratory tract and does not occur curling, the movement of the catheter part 100 will not affect the ventilation of the patient, and the catheter part does not need to be adjusted. The processor 500 only gives a warning in the case that the displacement information exceeds the displacement threshold, so as to avoid that the catheter part 100 completely separates from the respiratory tract.

[0076] The second kind: in the case that the coincidence rate of the respiratory tract feature does not exceed the coincidence rate threshold, if the catheter part 100 moves towards the respiratory tract and occurs curling, so that the coincidence rate of the respiratory tract feature and the standard image set is reduced, and the image angle of the respiratory tract feature is deflected, the curling deformation of the catheter part 100 will cause compression and damage to the wall of the respiratory tract. At this time, the medical staff needs to intervene in the treatment, and the processor 500 gives a warning.

[0077] The third kind: in the case that the coincidence rate of the respiratory tract feature exceeds the coincidence rate threshold, if the catheter part 100 moves away from the respiratory tract and occurs curling, so that the coincidence rate of the respiratory tract feature and the standard image set is reduced, and the image angle of the respiratory tract feature is deflected, the curling deformation of the catheter part 100 will cause compression and damage to the wall of the respiratory tract, or the catheter part 100 cannot continue to perform standard ventilation. At this time, the medical staff needs to intervene in the treatment, and the processor 500 gives a warning.

[0078] The fourth kind: in the case that the coincidence rate of the respiratory tract feature exceeds the coincidence rate threshold, if the catheter part 100 moves towards the respiratory tract, and in the case that the displacement information exceeds the displacement threshold, it indicates that the catheter part 100 is inserted into the respiratory tract too deeply, and the medical staff needs to intervene in the treatment, and the processor 500 gives a warning.

[0079] Therefore, the present application judges whether the insertion depth and the shape of the catheter part are appropriate by comparing the respiratory tract feature image with the standard image set, so as to avoid that the respiratory tract of the patient is blocked and damaged.

[0080] Preferably, as shown in Figure 2 The fitting part 300 is also provided with a hole allowing the catheter part 100 to pass through.

[0081] Preferably, as shown in Figure 1 and Figure 2 The circumferential surface of the communication assembly 201 and the support assembly 203 is configured with a flexible soft silica gel layer 204. The flexible soft silica gel layer 204 can constrain the catheter part 100 on the circumferential outer wall of the mouth pad part 200 in the form of simultaneously surrounding the catheter part 100 and the mouth pad part 200.

[0082] The operation principle of the present application is shown as follows.

[0083] The medical staff inserts the first end of the catheter part 100 provided with the image acquisition assembly 400 into the respiratory tract of the patient and determines the approximate length, and then places the fitting part 300 at the patient's lips. At this time, the processor 500 establishes communication with the image acquisition assembly 400. The processor 500 determines whether the insertion depth is appropriate according to the coincidence rate of the respiratory tract feature image collected by the image acquisition assembly 400 and the standard image set. When the coincidence rate is greater than the coincidence rate threshold and the patient has no obvious abnormalities, the insertion depth is considered to be appropriate.

[0084] The support assembly 203 of the mouth pad part 200 is placed between the upper and lower molars of the patient, and the operation is such that the second end of the catheter part 100, i.e., the end away from the respiratory tract of the patient outside the oral cavity, is passed through the reserved hole of the fitting part 300 and the displacement detection assembly 202 on the communication assembly 201 from the inside of the fitting part 300, so that the second end of the catheter part 100 is in the space outside the fitting part 300. At this time, the length of the catheter part 100 is freely adjustable. In this way, according to the scale information of the catheter part 100 close to the scale line 101 on the second end, the medical staff can flexibly adjust the length of the trachea inserted into the respiratory tract of the patient according to the actual situation of the patient, so as to facilitate the treatment of the patient.

[0085] After the position of the catheter part 100 is adjusted, the catheter part 100 is respectively wrapped and fixed by the flexible soft silica gel layer 204 located on the support assembly 203 and the communication assembly 201, so that the relative position of the catheter part 100 and the mouth pad part 200 and the fitting part 300 is fixed.

[0086] After the above actions are completed, the elastic fixing belt is fixed around the head or neck of the patient. After the fixing work is completed, the communication between the displacement detection assembly 202 and the processor 500 is started, so that the above-mentioned assemblies are in the working state. The starting mode can be pressing the start button provided on each assembly.

[0087] When the processor 500 judges the position of the catheter part 100 in the respiratory tract according to the received displacement information and the respiratory tract feature image. When it is determined that it belongs to one of the first to fourth cases, a corresponding warning is given.

[0088] It should be noted that the above embodiments are exemplary, and those skilled in the art can think of various solutions under the inspiration of the disclosure of the present application, and these solutions also belong to the disclosed range of the present application and fall within the protection scope of the present application. Those skilled in the art should understand that the specification and drawings of the present application are illustrative and do not constitute a limitation on the claims. The protection scope of the present application is defined by the claims and their equivalents. The specification of the present application contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", which all indicate that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application according to each inventive concept.

Claims

1. A displacement monitoring system for a ventilator tubing, characterized in that, Includes a limiting assembly disposed on the catheter portion (100), the limiting assembly comprising a dental pad portion (200) for placement between the patient's upper and lower molars to provide support for the patient's bite and a processor (500). The dental pad (200) monitors the displacement information of the catheter section (100) by collecting scale changes of the catheter section (100) based on light detection changes; wherein, the first end of the catheter section (100) is provided with at least one layer of filter film marked with printed scale lines (101); the filter film is provided in such a way that the transmittance of light varies at different scale positions; The dental pad portion (200) includes at least one displacement detection component (202), which acquires the intensity of the reflected light from the catheter portion (100) to the probe light in a manner close to the scale line (101) of the catheter portion (100) to determine the change in scale. When the catheter section (100) is displaced, the intensity and / or wavelength of the infrared light collected by the displacement detection component (202) change. The processor (500) can promptly confirm the change of the scale line (101) based on the change of the infrared light, thereby confirming the current scale line position of the catheter section (100) and the displacement distance.

2. The displacement monitoring system according to claim 1, characterized in that, The dental pad portion (200) also includes a connecting component (201). The connecting component (201) is disposed on the outer side of the fitting portion (300) that does not face the patient's lips; the connecting component (201) is connected to the displacement detection component (202); When the connecting component (201) is not movable in the radial direction of the fitting portion (300), the shape of the displacement detection component (202) is arranged in a way that can limit the radial movement range of the conduit portion (100), so that the radial distance between the displacement detection component (202) and the scale line (101) of the conduit portion (100) varies within a preset range.

3. The displacement monitoring system according to claim 1 or 2, characterized in that, The acquisition cycle of the displacement detection component (202) is set by the processor (500); The acquisition cycle of the displacement detection component (202) is shortened based on the displacement frequency of the guide tube (100) starting from the original acquisition cycle. When the displacement does not exceed the displacement threshold, the displacement frequency of the conduit (100) increases, and the acquisition cycle of the displacement detection component (202) is shortened accordingly.

4. The displacement monitoring system according to any one of claims 1 to 3, characterized in that, The limiting component also includes an image acquisition component (400); The image acquisition component (400) is disposed at the first end of the catheter (100) entering the pharynx, and acquires respiratory tract feature images at the location of the first end of the catheter (100); The processor (500) determines the positional and / or morphological changes of the first end of the duct section (100) based on the received displacement information and respiratory tract feature images, compares the received respiratory tract feature images with a standard image set of standard anatomical diagrams of respiratory tract tissue structures and calculates the feature overlap rate, and determines whether to issue a warning message based on the feature overlap rate and displacement information.

5. The displacement monitoring system according to any one of claims 1 to 4, characterized in that, The processor (500) is configured to: If the overlap rate of the airway features does not exceed the overlap rate threshold, and if the catheter portion (100) only moves away from the airway without curling, an early warning is issued when the displacement information exceeds the displacement threshold. If the overlap rate of the respiratory features does not exceed the overlap rate threshold, and the catheter portion (100) moves toward the direction of the respiratory tract and curls up, an early warning is issued when the image angle of the respiratory features deflects. If the overlap rate of respiratory features exceeds the overlap rate threshold, and if the catheter portion (100) moves away from the respiratory tract and curls up, and at the same time the image angle of the respiratory features deflects, an early warning is issued. If the overlap rate of respiratory features exceeds the overlap rate threshold, the catheter section (100) moves towards the direction of the respiratory tract, and an early warning is issued when the displacement information exceeds the displacement threshold.

6. The displacement monitoring system according to any one of claims 1 to 5, characterized in that, The processor (500) determines whether the insertion depth of the catheter section (100) is appropriate based on the overlap rate between the respiratory tract feature image acquired by the image acquisition component (400) and the standard image set. When the overlap rate is greater than the overlap rate threshold and the patient has no obvious abnormalities, the insertion depth is considered appropriate.

7. The displacement monitoring system according to any one of claims 1 to 6, characterized in that, The dental pad portion (200) also includes a support assembly (203). The connecting component (201) and the supporting component (203) are arranged to be connected to each other and penetrate the fitting portion (300) on both sides of the fitting portion (300), and the connecting component (201) and the supporting component (203) are combined to form a tube with at least one channel, so that oral secretions can be discharged from the connecting component (201) and the supporting component (203).

8. The displacement monitoring system according to any one of claims 1 to 7, characterized in that, The scale line (101) is located at the second end of the catheter portion (100) that does not enter the pharynx. The catheter portion (100) penetrates the fitting portion (300) such that its first end and second end are distributed on both sides of the fitting portion (300).

9. A limiting component of a displacement monitoring system for a ventilator duct, characterized in that, The limiting component includes a dental pad (200) for placement between the patient's upper and lower molars to support the patient's bite and a processor (500). The dental pad (200) monitors the displacement information of the catheter section (100) by collecting scale changes of the catheter section (100) based on light detection changes; wherein, the first end of the catheter section (100) is provided with at least one layer of filter film marked with printed scale lines (101); the filter film is provided in such a way that the transmittance of light varies at different scale positions; The dental pad portion (200) includes at least one displacement detection component (202), which acquires the intensity of the reflected light from the catheter portion (100) to the probe light in a manner close to the scale line (101) of the catheter portion (100) to determine the change in scale. When the catheter section (100) is displaced, the intensity and / or wavelength of the infrared light collected by the displacement detection component (202) change. The processor (500) can promptly confirm the change of the scale line (101) based on the change of the infrared light, thereby confirming the current scale line position of the catheter section (100) and the displacement distance.

10. The limiting component according to claim 9, characterized in that, The limiting component also includes an image acquisition component (400); The image acquisition component (400) is disposed at the first end of the catheter (100) entering the pharynx, and acquires respiratory tract feature images at the location of the first end of the catheter (100); The processor (500) determines the positional and / or morphological changes of the first end of the duct section (100) based on the received displacement information and respiratory tract feature images, compares the received respiratory tract feature images with a standard image set of standard anatomical diagrams of respiratory tract tissue structures and calculates the feature overlap rate, and determines whether to issue a warning message based on the feature overlap rate and displacement information.

Images