A breathing assistance system

Abstract

The present invention relates to a respiratory assistance system, comprising at least a ventilator body and an trachea, wherein at least a position limiting assembly is provided on the trachea, the position limiting assembly comprising at least a catheter portion, a bite block portion, an image acquisition assembly, and a processor; the bite block portion and the image acquisition assembly are respectively connected to the processor in a wired and / or wireless manner; the bite block portion monitors displacement information of the catheter portion by acquiring scale changes of the catheter portion based on light detection changes; the image acquisition assembly is provided at the first end of the catheter portion where it enters the throat, and acquires a characteristic image of the respiratory tract at the location of the first end of the catheter portion; the processor is configured to determine positional and / or morphological changes of the first end of the catheter portion based on the received displacement information and the characteristic image of the respiratory tract. The present invention avoids the problem of inappropriate insertion depth of the tracheal catheter portion by monitoring both the catheter portion and the characteristic image of the respiratory tract from two angles, and also improves the accuracy of the catheter portion displacement warning.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a respiratory assistance system. Background Art

[0002] Endotracheal intubation is a method of inserting a special endotracheal tube into the tracheal respiratory tract through the oral cavity or nasal cavity and the glottis, which provides the best conditions for airway patency, ventilation and oxygen supply, and airway suction, and is an important measure to rescue patients with respiratory dysfunction. Most of the endotracheal tube fixing devices used clinically are traditional bite pads + elastic band (or tape) winding combination devices. Most bite pads are made of hard materials to prevent patients from biting the tube and making the tube closed and unable to ventilate. The elastic band or tape can fix the tube and the bite pad. After the endotracheal intubation is completed, an elastic bandage or tape will be used to wrap the endotracheal tube and the bite pad around and fix them on one side of the corner of the mouth. However, the existing technology has the following defects:

[0003] Affected by the medical staff's operating techniques or the patient's own factors, traditional fixation devices may have two possible accidental detachment situations. The first is the displacement of the tracheal tube due to the poor stability of the connection between the tracheal tube and the bite block. The second is the loosening of the elastic band or tape fixed to the patient's face and neck, causing the device to detach from the patient's mouth. Especially for prone ventilation, the fixation device using this method is less stable due to the influence of gravity compared to supine ventilation, and it is difficult for medical staff to always pay attention to the patient's tracheal intubation status. If it is not discovered in time, it will not only affect the patient's normal treatment, but also pose a threat to the patient's life safety.

[0004] For example, patent publication number CN113082425A discloses an early warning and anti-dropout endotracheal tube holder, comprising a silicone pad, a donning mechanism, a fixing sleeve, a moving mechanism, a screw, an alarm mechanism, a control mechanism, and an activation mechanism. The silicone pad is sewn with a donning mechanism at both ends on the right side, a fixing sleeve is fixedly passed through the middle end on the left side of the silicone pad, a moving mechanism is slidably provided inside the fixing sleeve, screws are threaded through the upper and lower ends on the left side of the moving mechanism, an alarm mechanism is fixed to the outer wall of the fixing sleeve, a control mechanism is fixed to the lower end of the fixing sleeve, and an activation mechanism is fixed to the lower right end of the moving mechanism. Although this fixture can provide early warning, its drawback is that, in the prone position, such a fixture is large and heavy, and the ventilation effect is poor due to the influence of gravity.

[0005] The present invention aims to provide a ventilation endotracheal tube fixing device with high early warning efficiency, comfort, safety and good ventilation effect.

[0006] In addition, 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 the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the Invention

[0007] In response to the deficiencies of the prior art, the present invention provides a respiratory assistance system, which at least includes a ventilator body and a trachea, wherein at least a limit assembly is provided on the trachea, and the limit assembly at least includes a bite block portion, an image acquisition assembly and a processor; the bite block portion and the image acquisition assembly are respectively connected to the processor in a wired and / or wireless manner; the bite block portion monitors the displacement information of the catheter portion by collecting scale changes of the catheter portion based on light detection changes; the image acquisition assembly is provided at the first end of the catheter portion entering the throat, and collects a respiratory tract characteristic image at the position where the first end of the catheter portion is located; the processor is configured to: judge the position change and / or morphological change of the first end of the catheter portion based on the received displacement information and the respiratory tract characteristic image.

[0008] The present invention uses a processor to simultaneously monitor the insertion depth of the catheter and the respiratory tract characteristics, and comprehensively judges whether the displacement of the catheter exceeds a threshold. It can promptly and accurately transmit adverse conditions to the medical staff's terminal in real time, allowing the medical staff to adjust the insertion depth of the airway tube in time to improve the safety of the patient.

[0009] Preferably, the processor is further configured to: compare the received respiratory feature image with a standard image set and calculate a feature overlap rate, and determine whether to issue a warning message based on the feature overlap rate and the displacement information.

[0010] The present invention determines whether the insertion depth and shape of the airway are appropriate by comparing the respiratory tract feature image with the standard image set, thereby avoiding obstruction of the patient's respiratory tract.

[0011] Preferably, the mouthpiece support portion includes at least a communication component and at least one displacement detection component, the communication component being connected to the displacement detection component. The displacement detection component collects the intensity of the light reflected from the catheter portion by the detection light, near the scale line of the catheter portion, to determine the scale change. The present invention determines the displacement of the catheter portion through light detection, achieving the effect of accurately determining the displacement of the catheter portion without affecting the movement of the catheter portion.

[0012] Preferably, when the connecting component cannot move in its own radial direction at the fitting portion, the shape of the displacement detection component is set in a manner that can limit the radial movement range of the catheter portion, so that the radial distance between the displacement detection component and the scale line of the catheter portion varies within a preset range.

[0013] The displacement detection component is used to limit the catheter part so that it cannot move over a large range, thereby improving the accuracy of the displacement detection component for scale changes and avoiding deviations in displacement detection due to problems with the movement angle of the airway tube.

[0014] Preferably, the dental pad portion further includes a supporting component, and the connecting component and the supporting component are respectively arranged on both sides of the fitting portion in a manner of being connected to each other and penetrating the fitting portion, and the connecting component and the supporting component are combined to form a tube body having at least one channel, so that oral secretions can be discharged through the connecting component and the supporting component.

[0015] The connecting component and the supporting component are combined to form a tube body with 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.

[0016] Preferably, the tube body formed by the connecting component and the supporting component is arranged in parallel with the conduit portion in such a manner that the two tubes do not affect each other and are also conducive to the smooth discharge of secretions.

[0017] Preferably, the scale line is set at the second end of the catheter part that does not enter the throat, and the catheter part passes through the fitting part so that its first end and second end are distributed on both sides of the fitting part. Such an arrangement is conducive to monitoring the movement of the catheter part.

[0018] Preferably, at least one filter film is provided on the scale line, and the filter film is provided in such a manner that the transmittance of light to different scale positions is different. In this way, the change of the scale line can be judged based on the difference in transmittance, which is convenient and quick.

[0019] Preferably, the fitting portion further comprises at least one fixing component, which is used to fix the fitting portion relative to the head when the fitting portion and the bite block portion are worn. This arrangement prevents the fitting portion from shifting, and also prevents damage to the respiratory tract caused by shifting of the catheter portion.

[0020] The present invention also provides a trachea limiting component of a respiratory assistance system, the limiting component comprising at least a catheter portion, a bite block portion, an image acquisition component and a processor; the bite block portion and the image acquisition component are respectively connected to the processor in a wired and / or wireless manner; the bite block portion monitors the displacement information of the catheter portion by acquiring scale changes of the catheter portion based on light detection changes; the image acquisition component is arranged at the first end of the catheter portion entering the throat, and acquires a respiratory tract characteristic image at the position where the first end of the catheter portion is located; the processor is configured to: judge the position change and / or morphological change of the first end of the catheter portion based on the received displacement information and the respiratory tract characteristic image.

[0021] The limit assembly of the present invention uses the scale marked on the outer wall of the catheter as a reference to determine the relative position of the tracheal tube into the patient's trachea, avoiding the tracheal tube from being inserted too deep or too shallow, ensuring the effectiveness and stability of the patient's ventilation. At the same time, the filter membrane has the characteristic of maintaining good performance under different ambient temperatures and humidity conditions, thereby preventing the patient's exhaled gases and oral secretions with temperatures and humidity different from the ambient temperature and humidity from interfering with the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a simplified module of a position limiting assembly according to a preferred embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram from another angle of a simplified module of a limiting assembly according to a preferred embodiment of the present invention.

[0024] Reference Signs List

[0025] 100: catheter part; 200: tooth pad part; 300: fitting part; 101: scale line; 201: connecting component; 202: displacement detection component; 203: supporting component; 204: elastic soft silicone layer; 301: fixing component; 400: image acquisition component; 500: processor. DETAILED DESCRIPTION

[0026] The following is a detailed description with reference to the accompanying drawings.

[0027] The main pathophysiological mechanism of prone ventilation is to significantly improve the patient's ventilation / perfusion ratio and oxygenation; promote the expansion of collapsed alveoli, improve the compliance of the respiratory system, and facilitate the drainage of deep sputum.

[0028] The tracheal tube of a traditional ventilator can accidentally become detached in two ways, depending on the medical staff's technique or the patient's own personal circumstances. The first is due to the poor stability of the connection between the tracheal tube and the bite block, causing the tracheal tube to shift. The second is due to the elastic band or tape securing the device to the patient's face and neck loosening, causing the device to detach from the patient's mouth. This is especially true for prone ventilation, where the tube's stability is further affected by gravity, making it difficult for medical staff to constantly monitor the patient's tracheal intubation status. If not detected promptly, the ventilator tube not only affects the patient's normal treatment but also poses a threat to their life.

[0029] In view of the existing technology, the present invention provides a respiratory assistance system that can timely warn and monitor ventilation conditions, especially a limit assembly for prone ventilation trachea, such as Figure 1 and Figure 2 shown.

[0030] The present invention can also provide a displacement monitoring system and an alarm system for the catheter of a ventilator. The present invention can also be a recording system for recording the displacement of the catheter in the respiratory tract during ventilation, so as to serve as medical evidence for identification of responsibility for medical accidents when medical disputes occur. In general treatment processes, due to the lack of records of the ventilation process, it is difficult to clearly determine medical responsibility when medical disputes occur, resulting in the medical system and its treating medical staff being held additionally accountable. The present invention can clearly record the displacement of the catheter and its movement inside the respiratory tract, and can record the deformation state of the catheter and the characteristics of the respiratory tract, thereby realizing the recording of the ventilation process and identification of responsibility for medical accidents, and avoiding unnecessary responsibility for the medical system and medical staff.

[0031] The respiratory assistance system of the present invention comprises at least a ventilator body and a trachea. The trachea is provided with at least a limit component, such as Figure 1 As shown, the limiting assembly includes at least a bite block portion 200, an image acquisition assembly 400 and a processor 500. The bite block portion 200 and the image acquisition assembly 400 are respectively connected to the processor 500 in a wired and / or wireless manner. The bite block portion 200 monitors the displacement information of the catheter portion 100 by collecting the scale change of the catheter portion 100 based on the light detection change; the image acquisition assembly 400 is arranged at the first end of the catheter portion 100 entering the throat, and collects the respiratory tract characteristic image of the position of the first end of the catheter portion 100; the processor 500 is configured to: judge the position change and / or morphological change of the first end of the catheter portion 100 based on the received displacement information and respiratory tract characteristic image.

[0032] The present invention uses a processor to simultaneously monitor the insertion depth of the catheter and the respiratory tract characteristics, and comprehensively judges whether the displacement of the catheter exceeds a threshold. It can promptly and accurately transmit adverse conditions to the medical staff's terminal in real time, allowing the medical staff to adjust the insertion depth of the airway tube in time to improve the safety of the patient.

[0033] The limit assembly of the present invention uses the scale marked on the outer wall of the catheter as a reference to determine the relative position of the tracheal tube into the patient's trachea, avoiding the tracheal tube from being inserted too deep or too shallow, ensuring the effectiveness and stability of the patient's ventilation. At the same time, the filter membrane has the characteristic of maintaining good performance under different ambient temperatures and humidity conditions, thereby preventing the patient's exhaled gases and oral secretions with temperatures and humidity different from the ambient temperature and humidity from interfering with the detection results.

[0034] like Figure 1 As shown, the catheter portion 100 is used to establish a channel connecting the patient's respiratory tract with the outside world. The catheter portion 100 can be any type of tube that meets the requirements of a medical device. Preferably, the catheter portion 100 is a silicone tube, which has the characteristics of being soft, slightly deformable, and recoverable, and is not likely to damage the patient's oral tissue.

[0035] A miniature image capture assembly 400 is installed at the first end of the catheter portion 100, which is inserted into the respiratory tract. Image capture assembly 400 is positioned so as not to obstruct the ventilation passage of catheter portion 100. For example, image capture assembly 400 is positioned at the second end of catheter portion 100, with several ventilation holes disposed around it. Preferably, image capture assembly 400, excluding the camera lens, is wrapped in a flexible layer to prevent damage to the respiratory tract.

[0036] The miniature image acquisition component 400 is, for example, a miniature camera, and is used to acquire respiratory characteristic images. The image acquisition component 400 establishes a communication connection with the processor 500 in a wired and / or wireless manner.

[0037] The image acquisition component 400 is used to acquire images of the tissue structure of the respiratory tract.

[0038] Preferably, the second end of the catheter portion 100 is marked with a scale line 101, which is used to reflect the length of the catheter portion 100 extending into the patient's respiratory tract, thereby preventing the catheter portion 100 from being over-inserted into the respiratory tract or insufficiently inserted into the respiratory tract.

[0039] Preferably, the conduit portion 100 is a transparent tube. Alternatively, a transparent section is provided near the first end of the conduit portion 100. The first end of the conduit portion 100 is provided with at least one layer of filter film with printed scale marks.

[0040] Preferably, the filter film is arranged in such a way that the transmittance of light to different scale positions is different. Preferably, the thickness of the filter film is different at different scale positions.

[0041] Preferably, the filter film is not uniform; in a specific direction, the reflectivity and / or reflection wavelength of the light signal reflected by the filter film increases or decreases in a regular pattern. For example, the reflectivity of the filter film gradually increases from scale lines 1 to 5. Alternatively, the reflectivity of the filter film gradually decreases from scale lines 1 to 5. Different thicknesses of the filter film result in different reflectivities and / or reflection wavelengths of the filter film. Therefore, the present invention adjusts and changes the thickness of the filter film to enable the filter film and the light collection assembly to cooperate with each other to monitor the displacement of the catheter portion 100.

[0042] Preferably, the filter film is a multi-layered photothermal film. This film has high transmittance in the visible light band and high reflectivity in the infrared band, and exhibits excellent stability in high-temperature and humid environments. By varying the thickness of each film layer according to a predetermined scale change direction, the present invention can adjust the range of the high-transmittance band, achieving different light reflectances and different optical band ranges.

[0043] The filter film comprises at least two layers of dielectric materials with different refractive indices. If A, B, and C represent the three materials, the dielectric materials can be A and B, or A, B, and C. The number of layers ranges from 2 to 1000, with dielectric materials of different refractive indices stacked on top of each other to form a laminated structure. If A and B represent the two materials, the filter film layer structure can be AB, ABA, ABAB, ABABA, ABABAB, ABABABA, BABABA, ABCBABCBA, ACABACBC, etc., with each layer having a thickness of 0.1 to 10,000 nm, such as 0.1 nm, 1 nm, 1.1 nm, 23.4 nm, 200 nm, 500 nm, or 10,000 nm.

[0044] The two dielectric materials with different refractive indices can be high-refractive-index dielectric materials or low-refractive-index dielectric materials. The high-refractive-index material is preferably TiO2, ZrO2, Ta2O5, HfO2, ZnS, LiNbO3, etc., and the low-refractive-index material is preferably Al2O3, SiO2, MgO, MgF2, CaF2, etc. Preferably, the high-refractive-index material is TiO2, and the low-refractive-index material is preferably Al2O3.

[0045] For example, a film filter effectively blocks infrared wavelengths, while reflecting a significant portion of visible light. If the film thickness or number of layers corresponding to each scale line or segment varies, the reflectivity or wavelength range of the infrared light reflected will differ. For example, the first scale segment will have a high reflectivity for infrared light above 780nm. Varying film thickness or the number of layers will cause variations in the reflectivity of the film filter.

[0046] Preferably, the scale lines on the filter film of the catheter portion 100 of the present invention serve not only to identify the first end, but also to indicate the collection position and angle. If the catheter portion 100 is separated from the fitting portion 300, the scale lines help medical personnel identify the inserted second end and the non-inserted first end, preventing medical personnel from making installation errors.

[0047] Preferably, the scale line is set at the second end of the catheter part 100 that does not enter the throat. The catheter part 100 passes through the fitting part 300 so that its first end and second end are distributed on both sides of the fitting part 300. This arrangement is conducive to monitoring the movement of the catheter part.

[0048] The fitting portion 300 is arranged at the patient's lip position when in use, and is used to fix the catheter portion 100 and the dental pad portion 200. The fitting portion 300 can be made of silicone material or fabric material. The fitting portion 300 is a soft sheet, so that it can be easily fitted on the patient's face and lips. Preferably, the inner side of the fitting portion 300 that contacts the lips can be provided with an anti-slip layer, such as a soft silicone layer, to prevent the fitting portion 300 from shifting, which is more conducive to the fixation of the fitting portion 300. Preferably, the anti-slip layer is provided on part of the side surface of the fitting portion 300 to facilitate the movement and positioning of the fitting portion 300 during initial setting. Not only that, the fitting portion attached to the patient's lip position when in use can prevent foreign matter in the outside air from floating into the patient's mouth, thereby improving safety and comfort.

[0049] The tooth pad 200 is designed to be placed between the patient's upper and lower molars to support the patient's bite. The tooth pad 200 includes at least a connecting component 201 and at least one displacement detection component 202. The number of displacement detection components 202 can be one, two, or even more, depending on the needs. The connecting component 201 is located on the outer side of the fitting portion 300 that does not face the patient's lips.

[0050] The connection component 201 is connected to the displacement detection component 202. The connection method is not limited and can be mechanical connection, adhesive connection, or connection via a connector. The connection component 201 is preferably a hollow tube. The displacement detection component 202 includes at least a light-emitting component and a light-collecting component. The light-emitting component is used to emit visible light and / or infrared light. The light-emitting component is, for example, various types of miniature LED lamp beads. The light-collecting component is used to collect the intensity and / or reflection band of light reflected by the filter film. The light-collecting component includes at least a photoelectric converter and an infrared light receiver. The number of infrared light receivers can be one, two, or even more. The light receiver is connected to the radio frequency converter to send the received infrared reflection signal to the photoelectric converter. The photoelectric converter converts the received infrared reflection signal into an electrical signal. The photoelectric converter is connected to the processor 500 in a wired and / or wireless manner to send the electrical signal to the processor 500. Preferably, the multiple infrared light receivers are distributed in a fan shape with the filter film as the center. Since the filter film on the catheter portion 100 is distributed in a curved surface, the reflected infrared light is radial. Therefore, more infrared light can be collected. The fan-shaped distribution of the infrared light receivers can receive as much infrared light as possible, thereby improving the accuracy of judging the intensity of the infrared light.

[0051] Preferably, processor 500 is a dedicated integrated circuit, server, single-chip microcomputer, and / or logic processor capable of processing the received electrical signals and images and obtaining a judgment result. Preferably, processor 500 also includes a memory capable of storing data processed by processor 500. Preferably, the processing steps executed by processor 500 are the steps of the method for determining the overlap rate between the respiratory tract characteristic image and the standard image set and the displacement of catheter unit 100 in the present invention.

[0052] Preferably, when the connecting component 201 cannot move in its own radial direction in the fitting portion 300, the shape of the displacement detection component 202 is set in a manner that can limit the radial movement range of the catheter portion 100, so that the radial distance between the displacement detection component 202 and the scale line of the catheter portion 100 varies within a preset range.

[0053] Preferably, the displacement detection component 202 is provided with a bracket. Figure 1 The bracket can be a ring-shaped bracket structure, or an arc-shaped bracket structure that is close to a ring. The bracket can be a one-piece structure or a plurality of structures can be spliced ​​together. The light-emitting component and the light-collecting component are arranged on the side of the bracket facing the scale line of the catheter part. Setting the bracket to a structure close to a ring can not only better collect the reflected infrared light, but also limit the movement range of the catheter part, so that the catheter part 100 will not tilt significantly, thereby avoiding the oblique damage of the catheter part 100 to the respiratory tract, and also preventing the vent hole at the first end of the catheter part 100 from being blocked by the wall of the respiratory tract.

[0054] Displacement detection assembly 202 measures the intensity of the reflected light from the catheter 100, near the scale lines of the catheter 100, to determine scale changes. The present invention uses light detection to determine the displacement of the catheter, achieving the effect of accurately determining the displacement of the catheter without affecting the movement of the catheter.

[0055] For example, the displacement detection component 202 is set within the scale range of the scale line. That is, the displacement detection component 202 is set within the reflection range of the filter film. When the catheter part 100 is displaced, the light intensity and / or infrared wavelength band of the infrared light collected by the displacement detection component 202 changes, so that the processor 500 can promptly confirm the change of the scale line according to the change of the infrared light, that is, it can confirm the current scale line position of the catheter part and the displacement distance that has occurred. Preferably, the processor 500 stores a preset displacement threshold. When the displacement distance of the catheter part exceeds the displacement threshold, the processor 500 can achieve early warning by sound, light, electricity or a combination thereof through at least one connected alarm.

[0056] The displacement detection component is used to limit the catheter portion so that the catheter portion cannot move over a large range, thereby improving the accuracy of the displacement detection component 202 in detecting scale changes and avoiding deviations in displacement detection caused by problems with the movement angle of the airway tube.

[0057] Preferably, the acquisition cycle of the displacement detection component 202 is not constant. 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 catheter portion 100, starting from the original acquisition cycle. That is, if the displacement frequency of the catheter portion 100 increases when the displacement does not exceed the displacement threshold, the acquisition cycle of the displacement detection component 202 will be shortened accordingly. This configuration can reduce the unnecessary data acquisition frequency of the displacement detection component 202, reduce the data processing capacity of the communication component 201, and avoid missing early warnings of catheter portion displacement.

[0058] For example, the preset original acquisition cycle of the displacement detection component 202 is 3 seconds per time. The displacement threshold is set to 0.5 cm. After the displacement detection component 202 sends the collected readable data to the processor 500, the processor 500 determines that the catheter portion 100 has undergone the first displacement based on the scale line data of the initial state. The displacement is ±L. When L is less than the displacement threshold, the processor 500 shortens the acquisition cycle by 1 second, so that the acquisition cycle is changed to 2.5 seconds per time. Similarly, after the displacement detection component 202 sends the collected readable data to the processor 500, the processor 500 determines that the catheter portion 100 has undergone the second displacement based on the scale line data of the initial state. When L is less than the displacement threshold, the processor 500 shortens the acquisition cycle by 1 second, so that the acquisition cycle is changed to 2 seconds per time. When L is greater than the displacement threshold, the processor 500 controls the alarm to issue an early warning signal. With this configuration, the greater the number of displacements, the shorter the acquisition cycle, and the less likely it is to miss the critical early warning moment of the catheter portion 100.

[0059] When the patient is ventilating in the prone position, the catheter portion 100 may fall off from the respiratory tract due to the influence of gravity due to the patient's body position or the surrounding environment. Therefore, the processor 500 of the present invention uses the number of displacements as the driving time to change the acquisition cycle. This can not only reduce the amount of invalid data processed by the processor 500, but also improve the accuracy of the early warning, achieve effective early warning, and avoid early warning in patients.

[0060] Preferably, the dental pad portion 200 further includes a support assembly 203. The connecting assembly 201 and the support assembly 203 are disposed on either side of the fitting portion 300, connected to each other and extending through the fitting portion 300. The connecting assembly 201 and the support assembly 203 are combined to form a tubular body having at least one channel, allowing oral secretions to be discharged through the connecting assembly 201 and the support assembly 203. Preferably, the connecting assembly 201 and the support assembly 203 are integrally formed.

[0061] For example, the communication component 201 is arranged on both the inner and outer sides of the fitting portion 300 in a manner that the communication component 201 and the support component 203 can be positioned opposite to each other. Wherein, the support component 203 is arranged on the inner side of the fitting portion 300 facing the patient's lips.

[0062] The connecting component 201 and the support component 203 combine to form a tubular body having at least one channel, which can be used to discharge secretions from the oral cavity and prevent further obstruction of the respiratory tract. Specifically, the interior of the support component 203 is provided with at least one channel running parallel to the tube portion. 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 or tubular shapes, and can also be irregular shapes that conform to the structure of the oral cavity. Any shape that facilitates the patient's bite is a preferred embodiment of the present invention. Figure 1The support assembly 203 is configured as a hollow tube in order to simply demonstrate the principle of the present invention.

[0063] Preferably, the tube body formed by the connecting component 201 and the supporting component 203 is arranged in parallel with the conduit portion 100. This arrangement is beneficial for preventing the two tubes from affecting each other and is also beneficial for the smooth discharge of secretions.

[0064] Preferably, the supporting component 203 is a cylindrical structure as a whole. Preferably, at least one first channel is provided in the middle of the supporting component 203 for suctioning sputum when necessary. The connecting component 201 is provided with at least one second channel. The first channel is connected to the second channel. The number of the first channel and the second channel is not limited to one, and can also be two or three. Preferably, the second channel of the connecting component 201 can be in the shape of a trumpet with a gradually increasing radius along the axial direction. And the radius increases with the distance from the lip. Such a configuration makes the pressure inside the lip oral cavity greater than the pressure outside the lip, and can make the flow rate of the fluid gradually increase with the increase of the radius, which is conducive to the rapid outflow of sputum and oral fluid.

[0065] Preferably, the fitting portion 300 further includes at least one fixing component 301. When the fitting portion 300 and the bite block portion 200 are worn, the at least one fixing component 301 is used to fix the fitting portion 300 relative to the head. This arrangement prevents the fitting portion from shifting, and also prevents damage to the respiratory tract caused by shifting of the catheter portion.

[0066] Preferably, the fixing component 301 is preferably configured as at least one elastic fixing belt 301, such as Figure 2 After the fitting portion 300 and the catheter portion 100 are inserted into the respiratory tract, the elastic fixing band 301 is tied or fastened around the patient's head to prevent the fitting portion from being displaced.

[0067] During ventilation treatment, it's unscientific to issue an early warning solely based on the displacement of the catheter 100. The respiratory structures of individual patients vary. Sometimes, even if the catheter moves beyond the displacement threshold, it doesn't affect the patient's breathing or cause damage to the airway. In such cases, the early warning is ineffective, distracting medical staff and increasing their efforts to adjust the airway tube 100.

[0068] Therefore, the processor 500 is further configured to compare the received respiratory tract feature image with the standard image set and calculate the feature overlap rate, and determine whether to issue a warning message based on the feature overlap rate and the displacement information of the catheter portion.

[0069] The standard image set is stored in the processor or in a memory connected to the processor, so that the processor can retrieve it at any time. The standard image set refers to a collection of standard anatomical images of respiratory tissue structure.

[0070] A coincidence rate threshold is preset in the processor 500. The coincidence rate refers to the numerical value of the similarity between the collected respiratory features and the standard image set.

[0071] Table 1 Monitoring situation

[0072]

[0073] The monitoring results are shown in Table 1.

[0074] First: If the overlap rate of respiratory characteristics does not exceed the overlap rate threshold, and if the catheter unit 100 is only moving away from the respiratory tract and not curling, the movement of the catheter unit 100 will not affect the patient's ventilation, and the catheter unit does not need to be adjusted. The processor 500 only issues an alert when the displacement information exceeds the displacement threshold to prevent the catheter unit 100 from completely dislodging from the respiratory tract.

[0075] The second scenario: If the overlap rate of respiratory features does not exceed the overlap rate threshold, but the catheter unit 100 moves toward the respiratory tract and curls, causing the overlap rate of respiratory features with the standard image set to decrease and the image angle of the respiratory features to deflect, the curling deformation of the catheter unit 100 may compress and damage the respiratory tract wall. In this case, medical personnel must intervene and the processor 500 will issue an alert.

[0076] The third scenario: If the overlap rate of respiratory features exceeds the overlap rate threshold, and the catheter unit 100 moves away from the respiratory tract and curls, causing the overlap rate of respiratory features with the standard image set to decrease and the image angle of the respiratory features to deflect, the curling deformation of the catheter unit 100 may compress and damage the walls of the respiratory tract, or the catheter unit 100 may be unable to continue normal ventilation. In this case, medical personnel need to intervene and the processor 500 will issue an early warning.

[0077] The fourth type: when the overlap rate of respiratory features exceeds the overlap rate threshold, if the catheter part 100 moves in the direction close to the respiratory tract, and the displacement information exceeds the displacement threshold, it means that the position of the airway phacoemulsification respiratory tract is too deep and medical staff need to intervene for treatment. At this time, the processor 500 issues an early warning.

[0078] Therefore, the present invention determines whether the insertion depth and shape of the airway are appropriate by comparing the respiratory feature image with the standard image set, thereby avoiding blockage and damage to the patient's respiratory tract.

[0079] Preferably, if Figure 2 As shown, the fitting portion 300 is further provided with a hole allowing the catheter portion 100 to pass through.

[0080] Preferably, if Figure 1 and Figure 2 As shown, the circumference of the connecting component 201 and the supporting component 203 is provided with an elastic soft silicone layer 204. The elastic soft silicone layer 204 can simultaneously surround the conduit portion 100 and the bite block portion 200 to constrain the conduit portion 100 on the circumferential outer wall of the bite block portion 200.

[0081] The operating principle of the present invention is as follows.

[0082] Medical personnel insert the first end of the catheter portion 100, equipped with the image acquisition assembly 400, into the patient's airway and determine the approximate length. They then place the fitting portion 300 against the patient's lips. At this point, the processor 500 establishes communication with the image acquisition assembly 400. The processor 500 determines whether the insertion depth is appropriate based on the overlap between the respiratory tract feature image captured by the image acquisition assembly 400 and the standard image set. If the overlap exceeds a threshold and the patient has no obvious abnormalities, the insertion depth is considered appropriate.

[0083] The support assembly 203 of the dental pad portion 200 is placed between the patient's upper and lower molars, and at the same time, the second end of the catheter portion 100, that is, the end located outside the patient's oral cavity and away from the patient's respiratory tract, is operated so as to pass through the reserved hole and the displacement detection assembly 202 on the connecting assembly 201 from the inner side of the fitting portion 300, so that the second end of the catheter portion 100 is in the space where the outer side of the fitting portion 300 is located. At this time, the length of the catheter portion 100 is freely adjustable. In this way, according to the scale information of the scale line on the second end of the catheter portion 100 near the second end, medical staff can flexibly adjust the length of the trachea inserted into the patient's respiratory tract according to the patient's actual situation to facilitate the patient's treatment.

[0084] After the position of the catheter portion is adjusted, the catheter portion 100 is wrapped and fixed by the elastic soft silicone layer 204 located on the support component 203 and the connecting component 201, so that the relative positions of the catheter portion 100, the tooth pad portion 200 and the fitting portion 300 are fixed.

[0085] After the above steps are completed, the elastic fixing band 301 is fixed around the patient's head or neck. After the fixing work is completed, the communication between the displacement monitoring component 202 and the processor 500 is started to put the above components into working state. The starting method can be pressing the start button set on each component.

[0086] When the processor 500 determines the current position of the catheter portion in the respiratory tract based on the received displacement information and the respiratory tract characteristic image, a corresponding warning is issued when it is determined that the position belongs to any of the first to fourth situations.

[0087] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and fall within the scope of protection of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", which means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept.

Claims

1. A respiratory assistance system, comprising at least a ventilator body and a trachea, characterized in that: A limit assembly is set on the trachea. The limiting component includes a tooth pad portion, an image acquisition component and a processor; the tooth pad portion and the image acquisition component are respectively connected to the processor in a wired and / or wireless manner; The bite block portion monitors the displacement information of the catheter portion by collecting scale changes of the catheter portion based on light detection changes. The bite block portion includes a connecting component and at least one displacement detection component. The connecting component is connected to the displacement detection component. The displacement detection component collects the intensity of the reflected light of the catheter portion to determine the scale change by approaching the scale line of the catheter portion. The image acquisition component is arranged at the first end of the catheter portion entering the throat, and acquires a characteristic image of the respiratory tract at the location of the first end of the catheter portion; The processor is configured to: determine a position change and / or morphological change of the first end of the catheter portion based on the received displacement information and the respiratory tract characteristic image, compare the received respiratory tract characteristic image with a standard image set of a standard anatomical diagram of the respiratory tract tissue structure and calculate a feature overlap rate, and determine whether to issue a warning message based on the feature overlap rate and the displacement information, When the overlap rate of respiratory features does not exceed the overlap rate threshold, if the catheter portion only moves away from the respiratory tract and does not curl, and the displacement information exceeds the displacement threshold, an early warning is issued; When the overlap rate of respiratory features does not exceed the overlap rate threshold, if the catheter moves toward the respiratory tract and curls, and if the image angle of the respiratory features deflects, an alarm is issued; When the overlap rate of respiratory features exceeds the overlap rate threshold, if the catheter moves away from the respiratory tract and curls, and if the image angle of the respiratory features deflects, an alarm is issued; When the overlap rate of the respiratory features exceeds the overlap rate threshold, if the catheter moves in a direction close to the respiratory tract, and at the same time, when the displacement information exceeds the displacement threshold, an early warning is issued.

2. The respiratory assistance system according to claim 1, characterized in that When the connecting component (201) is immovable in its own radial direction relative to the fitting portion (300), the shape of the displacement detection component (202) is set in a manner capable of limiting the radial movement range of the conduit portion (100), thereby allowing the radial distance between the displacement detection component (202) and the scale line of the conduit portion (100) to vary within a preset range.

3. The respiratory assistance system according to claim 2, characterized in that The tooth pad portion (200) further includes a support assembly (203), The connecting component (201) and the supporting component (203) are respectively arranged on both sides of the fitting portion (300) in a manner of being connected to each other and penetrating the fitting portion (300), and the connecting component (201) and the supporting component (203) are combined to form a tube body having at least one channel, so that oral secretions can be discharged through the connecting component (201) and the supporting component (203).

4. The respiratory assistance system according to claim 3, characterized in that The tube body formed by the combination of the connecting component (201) and the supporting component (203) and the conduit portion (100) are arranged in parallel with their axes.

5. The respiratory assistance system according to claim 2, characterized in that: The scale line is set at the second end of the catheter part (100) that does not enter the throat. The conduit portion (100) passes through the fitting portion (300) so that the first end and the second end thereof are distributed on both sides of the fitting portion (300).

6. The respiratory assistance system according to claim 5, characterized in that At least one layer of filter film is arranged on the scale line, and the filter film is arranged in a manner such that the transmittance of light at different scale positions is different.

7. The respiratory assistance system according to claim 6, characterized in that The fitting portion (300) further includes at least one fixing component (301), When the fitting portion (300) and the tooth pad portion (200) are worn, at least one fixing component (301) is used to fix the fitting portion (300) relative to the head.

8. A tracheal limit assembly of a respiratory assistance system, characterized in that: The limiting assembly includes a catheter portion, a tooth pad portion, an image acquisition assembly and a processor; the tooth pad portion and the image acquisition assembly are respectively connected to the processor in a wired and / or wireless manner; The bite block portion monitors the displacement information of the catheter portion by collecting scale changes of the catheter portion based on light detection changes. The bite block portion includes a connecting component and at least one displacement detection component. The connecting component is connected to the displacement detection component. The displacement detection component collects the intensity of the reflected light of the catheter portion to determine the scale change by approaching the scale line of the catheter portion. The image acquisition component is arranged at the first end of the catheter portion entering the throat, and acquires a characteristic image of the respiratory tract at the location of the first end of the catheter portion; The processor is configured to: determine a position change and / or morphological change of the first end of the catheter portion based on the received displacement information and the respiratory tract characteristic image, compare the received respiratory tract characteristic image with a standard image set of a standard anatomical diagram of the respiratory tract tissue structure and calculate a feature overlap rate, and determine whether to issue a warning message based on the feature overlap rate and the displacement information, When the overlap rate of respiratory features does not exceed the overlap rate threshold, if the catheter portion only moves away from the respiratory tract and does not curl, and the displacement information exceeds the displacement threshold, an early warning is issued; When the overlap rate of respiratory features does not exceed the overlap rate threshold, if the catheter moves toward the respiratory tract and curls, and if the image angle of the respiratory features deflects, an alarm is issued; When the overlap rate of respiratory features exceeds the overlap rate threshold, if the catheter moves away from the respiratory tract and curls, and if the image angle of the respiratory features deflects, an alarm is issued; When the overlap rate of the respiratory features exceeds the overlap rate threshold, if the catheter moves in a direction close to the respiratory tract, and at the same time, when the displacement information exceeds the displacement threshold, an early warning is issued.

Images