Respirator oscillogram recognition auxiliary tool and use method thereof

Abstract

The invention discloses a respirator oscillogram recognition auxiliary tool and a use method thereof, and relates to the technical field of respirator man-machine asynchronous recognition, and the tool comprises a box body, a shear fork telescopic frame assembly, a push plate and a recognition marker post; one side of the box body is provided with two windows, and one side of the width direction of the box body is provided with a slideway corresponding to each window; each shear fork telescopic frame group is mounted in the corresponding slide way; a spacing mark post is hinged to each intersection point on each scissor-fork telescopic frame assembly, each spacing mark post is parallel to the width direction of the corresponding slide way, the two ends of each spacing mark post are slidably connected with the corresponding slide way, and the spacing mark posts on the two scissor-fork telescopic frame assemblies are in one-to-one correspondence up and down; the two shear fork telescopic frame assemblies are connected with the push plate; the identification marker post stretches across the box body and slides along the box body. The method does not depend on computer program analysis, and can assist critical medical staff in quickly recognizing the abnormal type of the human-machine asynchronism of the respirator in a visual discrimination mode.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilator human-machine synchronous identification, and in particular to a ventilator waveform diagram identification auxiliary tool and a use method thereof. Background Art

[0002] As an effective means of artificially replacing spontaneous ventilation, ventilators are widely used in respiratory failure caused by various reasons, anesthesia respiratory management, respiratory support therapy, and emergency resuscitation. During mechanical ventilation, abnormal ventilation (such as ineffective triggering) often leads to patient-machine disharmony or asynchrony. This disharmony or asynchrony may prolong the duration of mechanical ventilation, cause discomfort to the patient, increase the work of breathing, cause muscle damage, reduce sleep quality, and even lead to respiratory-related lung damage, making it more difficult to wean the patient off the ventilator and even increasing mortality.

[0003] Most existing ventilators are unable to automatically identify abnormal events or human-machine asynchrony during ventilation. There are also some methods in the prior art for identifying human-machine asynchrony during mechanical ventilation, such as the human-machine asynchrony waveform recognition method and related equipment in the hybrid mechanical ventilation mode disclosed in Chinese patent CN202310058842.1, the human-machine asynchrony detection method and device for mechanically ventilated patients disclosed in Chinese patent CN202111268925.0, etc. The above-mentioned prior arts all use computers to process, analyze, and compare waveforms and collected data to automatically derive differences, but the methods here all rely on computer programs. When applied, the program needs to be built into the ventilator system, or the data monitored by the ventilator system needs to be exported and copied to special software for processing. Furthermore, the ventilators currently purchased by hospitals do not have the above-mentioned analysis software at all, and their manufacturers will not develop the authority to implant such analysis software. Even if the manufacturer is contacted to pay to add such functions, the cost is much higher than the hospital's expectations. As a critical care medical worker, how to quickly identify ventilator-machine asynchrony has become a compulsory subject in critical care. Existing ventilator screens can usually display three waveforms of the relationship between pressure, flow, tidal volume and breathing duration. Without the help of computer programs and the ventilator's lack of autonomous analysis software function, medical staff can only rely on their eyes to observe the changes in the waveforms. Since the three waveforms are far apart, it is difficult for the human eye to quickly identify human-machine asynchrony without a reference object. Therefore, it is necessary to design a ventilator waveform recognition auxiliary tool to assist critical care medical staff in quickly identifying the abnormal type of ventilator-machine asynchrony through visual judgment. Summary of the Invention

[0004] The present invention provides a ventilator waveform recognition auxiliary tool and a method for using the tool, which does not rely on computer program analysis and does not require professional data analysis capabilities. It can also assist critical care personnel in quickly identifying abnormal types of ventilator human-machine asynchrony through visual judgment. It has a simple structure, low cost, is easy to use, and is easy to promote.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A ventilator waveform identification auxiliary tool comprises a box body, a scissors-type telescopic frame assembly, a push plate and an identification mark rod; one side of the box body is provided with two windows extending in the length direction and distributed side by side in the upper and lower directions, the windows penetrate to the other side opposite to the box body, and a slide is provided on one side of the box body in the width direction corresponding to each of the windows along the length direction of the box body; each of the scissors-type telescopic frame groups is embedded in the corresponding slide from the open end of one of the slides, and one end of each of the scissors-type telescopic frame groups is fixedly connected to the end of the slide; each intersection on each of the scissors-type telescopic frame assemblies is hinged with a spacing mark Rod, each of the spacing markers is arranged parallel to the width direction of the slide, and the two ends of each spacing marker are slidably connected to the two sides of the corresponding slide, and the positions of the spacing markers on the two scissor-type telescopic frame assemblies correspond one to another; the other ends of the two scissor-type telescopic frame assemblies are connected to the push plates, and the push plates are pushed and pulled to control the simultaneous telescopic movement of the two scissor-type telescopic frame assemblies, thereby driving each of the spacing markers to move synchronously along the corresponding slide; the identification marker spans the box body in the width direction of the box body, and the two ends of the identification marker are respectively slidably connected to the length sides of the box body.

[0006] Furthermore, the scissors-type telescopic frame assembly includes two folding end plates, four first folding rods, a scissors-type telescopic frame and a plurality of spacing markers; the two folding end plates are spaced apart and each is provided with a hinged ear in the middle of the opposite side, and one end of each two first folding rods is hinged to a corresponding hinged ear; the scissors-type telescopic frame is arranged between the two folding end plates, and the other ends of the two first folding rods hinged on the same folding end plate are hinged to the two end points on the corresponding side of the scissors-type telescopic frame one by one; the middle of each spacing marker is hinged to an intersection on the scissors-type telescopic frame.

[0007] Furthermore, a vertically distributed end limit plate is respectively provided at both ends of the spacing mark, and each of the spacing marks is slidably embedded in the slide, wherein one side of the end limit plate abuts against one side of the slide, and one side of the other end limit plate abuts against the other side of the slide; the middle part of each of the spacing marks is hinged to the corresponding intersection, and the scissors-type telescopic frame assembly drives each of the spacing marks to slide along the corresponding slide at the same time when it is extended or retracted.

[0008] Furthermore, an L-shaped hook is extended outward from both ends of the identification rod toward the same side, and only one slide rail is provided on both sides of the length direction of the box body. The L-shaped horizontal end of one of the L-shaped hooks is slidably embedded in the corresponding slide rail, and the identification rod is slidably connected to the box body through the two L-shaped hooks.

[0009] Furthermore, the box body is provided with two through holes at one end corresponding to each end of the slide, and a threaded hole is opened on the folding end plate located at the end of the slide corresponding to each through hole. The box body is provided with two fixing bolts corresponding to each slide, and each fixing bolt passes through a through hole and is connected with a threaded hole to fix the folding end plate.

[0010] Furthermore, the push plate is slidably embedded in the open end of the slide, and a plurality of connecting rods are provided on one side of the push plate. The outer sides of the two folding end plates located on one side of the open end of the slide are provided with a plurality of connecting holes, and one end of each connecting rod is fixedly embedded in a connecting hole; the push plate is provided with a strip groove along the length direction of the box body, and the box body is provided with a threaded limit bolt at a position corresponding to the strip groove, and one end of the limit bolt is passed through the strip groove.

[0011] Based on the ventilator waveform recognition auxiliary tool designed by the present invention, a method for using the ventilator waveform recognition auxiliary tool is proposed to assist critical care medical staff in quickly identifying the abnormal type of ventilator human-machine asynchrony through visual identification. The method includes: Step 1: Place the box body close to the ventilator screen, align the upper window with the pressure change waveform, and the lower window with the flow and tidal volume change waveform. Through the windows, you can observe the position of each spacing mark on the corresponding scissor-type telescopic frame assembly and the changes in the waveform.

[0012] Step 2: By dragging and pulling the push plate, the telescopic movement of the two scissors-type telescopic frame assemblies is simultaneously adjusted to drive the corresponding spacing marks to move at the same time, thereby simultaneously changing the spacing between the two adjacent spacing marks. Taking the periodic spacing of the pressure change waveform as the reference, one of the intersection points of the scissors-type telescopic frame assembly is aligned with the starting point A of the pressure change, and the adjacent subsequent intersection point is adjusted to the starting point B of the pressure change of the subsequent cycle, completing the reference alignment of one breathing cycle.

[0013] Step 3. After completing the respiratory cycle reference alignment, check whether the subsequent respiratory cycles coincide with the corresponding spacing benchmarks. Then quickly observe the waveform of the flow and tidal volume changes to check whether the initial and end points of the corresponding cycle coincide with the corresponding two spacing benchmarks to quickly identify whether the cycles are synchronized.

[0014] Step 4: Then, slide the identification marker horizontally so that it is aligned with the inspiratory end point a on the pressure change waveform. Then, quickly check whether the position of the identification marker in the waveform of flow and tidal volume changes is at the turning point corresponding to the inspiratory end point a, and then quickly identify whether the trigger is synchronized.

[0015] The beneficial effects of the present invention are: 1) The design purpose of the present invention is to provide medical staff with a reference to assist them in visually identifying the two differences. The cross telescopic frame assembly synchronously extends and retracts to align the spacing between two adjacent spacing markers with the respiratory cycle of the pressure waveform. The spacing markers in the two rows of windows form a reference to assist in visually observing the respiratory cycle, making it easier to compare and identify the differences in the respiratory cycles of the three waveforms. By sliding and adjusting the position of the identification marker, it is aligned with the end of inhalation of the pressure waveform to form a vertical line reference with the identification marker, making it easier to compare and identify the differences in the trigger points of the three waveforms.

[0016] 2) Push and pull the push plate to control the simultaneous telescopic movement of the two scissor-type telescopic frame assemblies, thereby driving each spacing mark to move synchronously along the corresponding slide. During the movement, the distance between each two adjacent spacing marks is consistent, which serves as a reference to assist the user in identifying the difference in breathing cycles; the strip groove of the push plate is combined with the limit bolt so that the push plate can only extend and retract within the limited range of the strip groove and will not directly fall off the slide.

[0017] 3) The end limit plate on the spacing mark can increase the contact surface between the spacing mark and the slideway, and maintain the vertical position of the spacing mark.

[0018] 4) The identification mark rod is connected to the box body through two L-shaped hooks, and the fixing bolts act as an anti-loosening barrier to prevent the identification mark rod from sliding out of the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a three-dimensional diagram of the box body of the present invention; Figure 3 A perspective view of a scissor-type telescopic frame assembly according to the present invention; Figure 4 A three-dimensional diagram of the identification pole in the present invention; Figure 5 Waveform diagrams of various types of ventilator-machine asynchrony; Figure 6 Waveform diagram for ventilator triggering asynchrony; Figure 7A schematic diagram for forming a reference on a waveform diagram when the present invention is used; Figure ID: 1-box body, 2-scissor telescopic frame assembly, 3-push plate, 4-identification mark, 11-window, 12-slide, 13-fixing bolt, 14-limit bolt, 15-slide rail, 21-folding end plate, 22-first folding rod, 23-scissor telescopic frame, 24-spacing mark, 211-hinge ear, 231-intersection, 241-end limit plate, 31-connecting rod, 32-pull ring, 33-strip groove. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. When a component is referred to as being "set in the middle", it does not only mean being set in the exact middle position, but also means being within the range defined by the middle as long as both ends are not set. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Reference Figures 1 to 4 As shown, a ventilator waveform identification auxiliary tool includes a box body 1, a scissor-type telescopic frame assembly 2, a push plate 3 and an identification mark rod 4.

[0024] The box body 1 is a flat rectangular structure. Two windows 11 extending along the length direction and distributed side by side in the upper and lower directions are provided on one side of the box body 1. The windows 11 extend to the other opposite side of the box body 1. A slide 12 is provided on one side of the width direction of the box body 1 corresponding to the position of each window 11 along the length direction of the box body 1; one end of the slide extends to the outside of the far end of the window 11, and the width of the slide 12 is greater than the width of the window 11, so that the four sides of the window 11 are all located in the slide 12.

[0025] The scissors-type telescopic frame assembly 2 includes two folding end plates 21, four first folding rods 22, a scissors-type telescopic frame 23 and a plurality of spacing markers 24; the two folding end plates 21 are spaced apart and are each provided with a hinged ear 211 in the middle of the opposite side, and one end of each two first folding rods 22 is hinged to a corresponding hinged ear 211; the scissors-type telescopic frame 2 is arranged between the two folding end plates 21, and the other ends of the two first folding rods 22 hinged on the same folding end plate 21 are hinged to the two end points on the corresponding side of the scissors-type telescopic frame 23 in a one-to-one manner; the middle part of each of the spacing markers 24 is hinged to an intersection 231 on the scissors-type telescopic frame 23, and when the scissors-type telescopic frame assembly 2 is extended or retracted, it drives each of the spacing markers 24 to slide along the corresponding slide 12 at the same time. The width of the slide 12 is equivalent to the length of the folding end plate 21 and the spacing between the two ends of the spacing mark 24. During installation, first slide the folding end plate 21 at one end of the scissors telescopic frame assembly 2 from the open end of the slide 12 into the slide 12, and then slide the spacing mark 24 into the slide 12 one by one, so that each of the spacing mark 24 is arranged parallel to the width direction of the slide 12, and the two ends of each of the spacing mark 24 are slidably connected to the two sides of the corresponding slide 12; finally, slide the folding end plate 21 that is first embedded in the slide 12 to the end of the slide 12, and the box body 1 is provided with two through holes corresponding to one end of each of the slides 12, and the folding end plate 21 at the end of the slide 12 is provided with threaded holes corresponding to each of the through holes, and the box body 1 is provided with two fixing bolts 13 corresponding to each of the slides 12, and each of the fixing bolts 13 passes through one of the through holes and is connected with one of the threaded holes to fix the folding end plate 21. The other scissor-type telescopic frame assembly 2 is also installed into the corresponding slide 12 according to the above method. The folding end plates 21 at the other ends of the two scissor-type telescopic frame assemblies 2 are connected to the push plate 3. The connection positions of the two folding end plates 21 are consistent, thereby making the positions of the spacing markers 24 on the two scissor-type telescopic frame assemblies 2 correspond one to another. The push plate 3 is slidably embedded in the open end of the slide 12, and one side of the push plate 3 is provided with several connecting rods 31, and the other side of the push plate 3 is provided with a pull ring 32. The outer sides of the two folding end plates 12 on one side of the open end of the slide 12 are provided with several connecting holes. One end of each connecting rod 31 is fixedly embedded in a connecting hole by interference fit; push and pull the push plate 3 to control the simultaneous telescopic movement of the two scissors fork telescopic frame assemblies 2, thereby driving each of the spacing markers 24 to move synchronously along the corresponding slide 23; in order to limit the pushing and pulling range of the push plate 3, the push plate 3 is provided with a strip groove 33 along the length direction of the box body 1, and the box body 1 is provided with a threaded limit bolt 14 at the position corresponding to the strip groove 33, and one end of the limit bolt is passed through the strip groove 33, so that the push plate 3 can only be extended and retracted within the limited range of the strip groove, and will not directly separate from the slide 12.In order to keep the spacing mark 24 perpendicular to the slide 12 when moving, a vertically distributed end limit plate 241 is provided at each end of the spacing mark 24. Each of the spacing marks 24 is slidably embedded in the slide 12, and one side of the end limit plate 241 abuts against one side of the slide, and one side of the other end limit plate 241 abuts against the other side of the slide 12; the middle part of each of the spacing marks 24 is hinged to the corresponding intersection 231, and the end limit plate 241 can increase the contact surface between the spacing mark 24 and the slide 12 to maintain the vertical position of the spacing mark 24. The contact surface between the end limit plate 241 and the slide 12 can be coated with lubricant such as lubricating oil or graphite powder to avoid jamming when the spacing mark moves 24.

[0026] The identification bar 4 extends across the width of the box body 1, with both ends of the identification bar 4 slidingly connected to the longitudinal sides of the box body 1. Specifically, an L-shaped barb 41 extends outward from each end of the identification bar 4 toward the same side. Each side of the box body 1 is provided with a single slide rail 15. The L-shaped horizontal end of each L-shaped barb 41 slides and fits within a corresponding slide rail 15. The identification bar 4 is slidably connected to the box body 1 via the two L-shaped barbs 41. The slide rail 15 is configured as a recessed slide groove, with the slide groove entrance facing the fixing bolt 13. The fixing bolt 13 acts as a stopper for the identification bar 4, preventing the identification bar 4 from sliding out of the slide rail 15.

[0027] The existing ventilator screen can usually display three waveform graphs of the relationship between pressure, flow, tidal volume and breathing duration, such as Figures 5 to 7 As shown, one breath is a cycle, the inhalation point A is the starting point of the respiratory cycle, the inhalation end point a is the trigger point of the respiratory transition, and the exhalation stage begins after the inhalation end point a, with the exhalation end point B (the inhalation point of the next cycle) as the end point of the cycle, where the pressure change represents the change in the support of the ventilator, and the flow rate and tidal volume represent the change in the gas received by the human body. Human-machine synchronization between the ventilator and the patient theoretically requires that the cycle, timing and gas supply of the ventilator to the patient be consistent with the cycle, timing and required gas volume of the human body's breathing. Please refer to the figures and the figures. For example, the inhalation end point a needs to correspond to the peak position of the tidal volume waveform in the same cycle, and the flow waveform corresponds to the trough position in the same cycle. Different patients have different breathing habits, and the length of inspiration and exhalation are different. The ventilator needs to be adjusted according to the breathing habits of different patients. The differences in the amount of ventilator adjustment and the differences in the human body itself lead to human-machine asynchrony. The types of human-machine asynchrony can be divided into the following categories: cycle asynchrony ( Figure 5 The waveform at point a), triggering is not synchronized ( Figure 5 The waveform diagram at point b and Figure 6The present invention is designed to provide medical staff with a reference object to assist them in visually identifying these two differences. The function of the cross telescopic frame assembly 2 to synchronously extend and retract is to align the spacing between two adjacent spacing markers 24 with the respiratory cycle of the pressure waveform. The spacing markers 24 in the two rows of windows 11 form a reference to assist in visually observing the respiratory cycle, making it easier to compare and identify the respiratory cycle differences of the three waveforms. The position of the identification marker 4 is adjusted by sliding so that it is aligned with the inspiratory end point a of the pressure waveform, forming a vertical line reference with the identification marker 4, making it easier to compare and identify the trigger point differences of the three waveforms.

[0028] Please refer to Figure 6 and Figure 7 As shown, the following will introduce in detail how to use the auxiliary tool based on the above-mentioned ventilator waveform identification: When in use, place the box body 1 close to the ventilator screen, align the upper window 11 with the pressure change waveform, and align the lower window 11 with the flow and tidal volume change waveform (the width and spacing of the upper and lower windows 11 can be designed according to the waveform range and display position). Through the window 11, you can observe the position of each spacing mark 24 on the corresponding scissor-type telescopic frame assembly 2 and the changes in the waveform.

[0029] By dragging and pulling the push plate 3 to simultaneously adjust the telescopic movement of the two scissor-type telescopic frame assemblies 2, the corresponding spacing markers 24 are driven to move simultaneously, thereby simultaneously changing the spacing between the two adjacent spacing markers 24. Based on the periodic spacing of the pressure change waveform, one of the intersection points 231 of the scissor-type telescopic frame assembly 2 is aligned with the starting point A of the pressure change, and the adjacent subsequent intersection point 231 is adjusted to the starting point B of the pressure change of the subsequent cycle, completing the reference alignment of one breathing cycle.

[0030] After completing the respiratory cycle reference alignment, check whether the subsequent respiratory cycles coincide with the corresponding spacing benchmarks. Then quickly observe the waveform of the flow and tidal volume changes to check whether the initial and end points of the corresponding cycle coincide with the corresponding two spacing benchmarks to quickly identify whether the cycles are synchronized.

[0031] Then, by sliding the identification marker horizontally, align the identification marker 4 with the inspiratory end point a on the pressure change waveform, and then quickly check whether the position of the identification marker 4 in the waveform of flow and tidal volume changes is at the turning point corresponding to the inspiratory end point a, and then quickly identify whether the trigger is synchronized.

[0032] Some ventilators display pressure, quasi-flow, and tidal volume in inconsistent order or spacing. Therefore, in step 1), the window 11 on the box body 1 is aligned with two adjacent rows of waveform graphs actually displayed by the ventilator. First, it is determined whether there is human-machine asynchrony between the two current rows of waveform graphs, and then the remaining row and the row of waveform graphs adjacent to the waveform graph are checked.

[0033] In step 2), considering that the spacing markers are wide and can easily obscure portions of the waveform, when aligning the respiratory cycle, points A and B can be aligned directly using either the left or right side of the spacing markers as a reference, rather than the intersection. This means that the user can use either the intersection or one side of the spacing markers as a reference, depending on the situation. This is not mandatory; the spacing of the spacing markers only needs to correspond to one respiratory cycle. Similarly, in step 4), the end-of-inspiration point a can be aligned directly using one side of the identification markers as a reference.

[0034] The above are some details and techniques in the usage method, and users can apply them flexibly according to actual conditions.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be included in the scope of the technical solutions of the present invention.

Claims

1. A ventilator waveform recognition auxiliary tool, characterized in that: The invention comprises a box body, a scissor-type telescopic frame assembly, a push plate and an identification mark rod; one side of the box body is provided with two windows extending in the length direction and distributed side by side up and down, the windows penetrate to the other side opposite to the box body, and a slide is opened along the length direction of the box body at a position corresponding to each of the windows on one side of the width direction of the box body; each of the scissor-type telescopic frame groups is embedded in the corresponding slide from the open end of one of the slides, and one end of each of the scissor-type telescopic frame groups is fixedly connected to the end of the slide; each intersection on each of the scissor-type telescopic frame assemblies is hinged with a spacing mark rod, and each of the spacing marks rods is hinged with a spacing mark rod. The distance markers are arranged parallel to the width direction of the slide, and the two ends of each spacing marker are slidably connected to the two sides of the corresponding slide, and the positions of the spacing markers on the two scissor-type telescopic frame assemblies correspond one to another; the other ends of the two scissor-type telescopic frame assemblies are connected to the push plates, and the push plates are pushed and pulled to control the simultaneous telescopic movement of the two scissor-type telescopic frame assemblies, thereby driving each spacing marker to move synchronously along the corresponding slide; the identification marker spans the box body in the width direction of the box body, and the two ends of the identification marker are respectively slidably connected to the length sides of the box body.

2. A ventilator waveform recognition auxiliary tool according to claim 1, characterized in that, The scissors-type telescopic frame assembly includes two folding end plates, four first folding rods, a scissors-type telescopic frame and a plurality of spacing markers; the two folding end plates are spaced apart and each is provided with a hinged ear in the middle of one opposite side, and one end of each two first folding rods is hinged to a corresponding hinged ear; the scissors-type telescopic frame is arranged between the two folding end plates, and the other ends of the two first folding rods hinged to the same folding end plate are hinged to the two end points on the corresponding side of the scissors-type telescopic frame in a one-to-one correspondence; the middle of each spacing marker is hinged to an intersection on the scissors-type telescopic frame.

3. A ventilator waveform recognition auxiliary tool according to claim 2, characterized in that, Both ends of the spacing mark are respectively provided with a vertically distributed end limit plate, and each of the spacing marks is slidably embedded in the slide, wherein one side of the end limit plate abuts against one side of the slide, and one side of the other end limit plate abuts against the other side of the slide; the middle part of each of the spacing marks is hinged to the corresponding intersection, and when the scissors-type telescopic frame assembly is extended or retracted, it drives each of the spacing marks to slide along the corresponding slide at the same time.

4. A ventilator waveform recognition auxiliary tool according to claim 2, characterized in that, An L-shaped hook is extended outward from both ends of the identification mark toward the same side. There is only one slide rail on both sides of the length direction of the box body. The L-shaped horizontal end of one L-shaped hook is slidably embedded in the corresponding slide rail, and the identification mark is slidably connected to the box body through the two L-shaped hooks.

5. A ventilator waveform recognition auxiliary tool according to claim 2, characterized in that, The box body is provided with two through holes at one end corresponding to each end of the slide, and a threaded hole is opened on the folding end plate located at the end of the slide corresponding to each through hole. The box body is provided with two fixing bolts corresponding to each slide, and each fixing bolt passes through a through hole and is connected with a threaded hole to fix the folding end plate.

6. A ventilator waveform recognition auxiliary tool according to claim 2, characterized in that: The push plate is slidably embedded in the open end of the slide, and a plurality of connecting rods are provided on one side of the push plate. The outer sides of the two folding end plates located on one side of the open end of the slide are provided with a plurality of connecting holes, and one end of each connecting rod is fixedly embedded in a connecting hole; the push plate is provided with a strip groove along the length direction of the box body, and the box body is provided with a threaded limit bolt at a position corresponding to the strip groove, and one end of the limit bolt is passed through the strip groove.

7. A method for using a ventilator waveform recognition auxiliary tool, comprising using the ventilator waveform recognition auxiliary tool as claimed in any one of claims 1 to 6 to provide a reference for the waveform displayed by the ventilator monitoring device, thereby assisting the user in quickly identifying ventilator-machine asynchrony, wherein: The method of use includes: Step 1: Place the box body close to the ventilator screen, align the upper window with the pressure change waveform, and the lower window with the flow and tidal volume change waveform. Through the windows, you can observe the position of each spacing mark on the corresponding scissor-type telescopic frame assembly and the changes in the waveform. Step 2: By dragging and pulling the push plate, the telescopic movement of the two scissors-type telescopic frame assemblies is simultaneously adjusted to drive the corresponding spacing marks to move at the same time, thereby simultaneously changing the spacing between the two adjacent spacing marks. Taking the periodic spacing of the pressure change waveform as the reference, one of the intersection points of the scissors-type telescopic frame assembly is aligned with the starting point A of the pressure change, and the adjacent subsequent intersection point is adjusted to the starting point B of the pressure change of the subsequent cycle, completing the reference alignment of one breathing cycle. Step 3. After completing the respiratory cycle reference alignment, check whether the subsequent respiratory cycles coincide with the corresponding spacing benchmarks. Then quickly observe the waveform of the flow and tidal volume changes to check whether the initial and end points of the corresponding cycle coincide with the corresponding two spacing benchmarks to quickly identify whether the cycles are synchronized. Step 4: Then, slide the identification marker horizontally so that it is aligned with the inspiratory end point a on the pressure change waveform. Then, quickly check whether the position of the identification marker in the waveform of flow and tidal volume changes is at the turning point corresponding to the inspiratory end point a, and then quickly identify whether the trigger is synchronized.

Images