A ventilator trigger assistance assembly and trigger state determination method

Abstract

This invention discloses a ventilator triggering auxiliary component, comprising: a first water bottle, an intermediate structure, and a cap structure connected sequentially; a second water bottle is disposed inside the first water bottle, the bottom of the second water bottle being conductively connected to the bottom of the first water bottle via a conduit, and the upper part of the second water bottle being connected to the intermediate structure; the surface of the intermediate structure is provided with a data acquisition unit, a first conductive connector, and a second conductive connector, the data acquisition unit including a first data acquisition port and a second data acquisition port, the first data acquisition port being conductively connected to the interior of the second water bottle via the first conductive connector, and the second data acquisition port being conductively connected to the interior of the first water bottle via the second conductive connector. This invention also discloses a method for determining the triggering state of a ventilator. This invention solves the technical problems of existing triggering structures and methods being easily affected by external factors, having a high misjudgment rate, and being poorly tolerated by patients.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a ventilator triggering auxiliary component and a method for determining the triggering state. Background Technology

[0002] Currently, ventilator triggering methods mainly include pressure triggering, flow triggering, and diaphragmatic electrical triggering. Pressure triggering mainly changes the ventilator's output parameters based on the changes in pressure within the breathing tubing during the human respiratory process. Therefore, it is well tolerated by patients. However, in pressure triggering mode, the pressure within the tubing is greatly affected by air resistance and condensation, resulting in a high false alarm rate. Flow triggering is mainly based on the tidal volume required by the human body, changing the respiratory state by inhaling a certain flow rate. This triggering method is poorly tolerated by patients, as the tidal volume of each breath is not constant. This method is prone to overventilation or underventilation, and even lung injury. Diaphragmatic electrical triggering uses bioelectrical signals to trigger, directly collecting the human respiratory signal from the source. This triggering method is invasive, with difficult and costly module development, complicated intubation procedures, and the need for multiple calibrations of the electrical catheter depth, resulting in poor patient tolerance.

[0003] Patent application CN201911321806.X discloses a ventilator inspiratory triggering method and its application. This method involves detecting when the real-time flow rate reaches the expiratory point, initiating an expiratory operation, and simultaneously setting an inspiratory trigger threshold. When the detected real-time flow rate reaches the inspiratory trigger threshold, the ventilator cycles from expiratory to inspiratory operation. The inspiratory trigger threshold gradually decreases from its initial value to its final value after the expiratory point. However, this method fails to address the technical problems of existing triggering structures and methods being susceptible to external factors, having a high misjudgment rate, and being poorly tolerated by patients. Therefore, there is an urgent need to propose a ventilator triggering auxiliary component and a triggering state determination method to solve the technical problems of existing triggering structures and methods being susceptible to external factors, having a high misjudgment rate, and being poorly tolerated by patients. Summary of the Invention

[0004] The main objective of this invention is to provide a ventilator triggering assistance component and a triggering status determination method, aiming to solve the technical problems of existing triggering structures and methods being easily affected by external factors, having a high misjudgment rate, and being poorly tolerated by patients.

[0005] To achieve the above objectives, the present invention provides a ventilator triggering assistance component and a triggering state determination method. The ventilator triggering assistance component includes: a first water bottle, an intermediate structure, and a cap structure connected sequentially; a second water bottle is disposed inside the first water bottle, the bottom of the second water bottle is connected to the bottom of the first water bottle via a conduit, and the upper part of the second water bottle is connected to the intermediate structure; the surface of the intermediate structure is provided with a collection unit, a first conductive connector, and a second conductive connector; the collection unit includes a first collection port and a second collection port, the first collection port is connected to the interior of the second water bottle via the first conductive connector, and the second collection port is connected to the interior of the first water bottle via the second conductive connector.

[0006] In one preferred embodiment, the intermediate structure is provided with an extension tube, one end of which is connected to a connector, and the other end of which is electrically connected to the inside of the first water bottle.

[0007] In one preferred embodiment, the connector is a multi-port connector, which is provided with an air inlet, an air outlet, and a pressure supply port;

[0008] The air inlet is connected to the ventilator tubing, the air outlet is connected to the patient end, and the pressure supply port is connected to the extension tube.

[0009] In one preferred embodiment, the cover structure is provided with a plurality of countersunk posts, and the cover structure is threadedly connected to the intermediate structure through the countersunk posts.

[0010] In one preferred embodiment, the first conductive connector includes a first protrusion and a first conductive portion; the first conductive portion is conductively connected to the interior of the first protrusion; the first protrusion is connected to the first collection port via a flexible tube; and the first conductive portion is conductively connected to the second water bottle.

[0011] In one preferred embodiment, the second conductive connector includes a second protrusion and a second conductive portion; the second conductive portion is conductively connected to the interior of the second protrusion; the second protrusion is connected to the second collection port via a flexible tube; and the second conductive portion is conductively connected to the first water bottle.

[0012] In one preferred embodiment, the first water bottle is provided with a first threaded portion, and the first water bottle is threadedly connected to the cap structure through the first threaded portion.

[0013] In one preferred embodiment, the second water bottle is provided with a second threaded portion, and the second water bottle is threadedly connected to the intermediate structure through the second threaded portion.

[0014] In one preferred embodiment, the acquisition unit is a differential pressure sensor.

[0015] A method for determining the ventilator triggering status of a ventilator triggering assist component as described above includes the following steps:

[0016] Connect the ventilator triggering assist component to the patient end and the ventilator tubing respectively;

[0017] When the internal pressure of the first water bottle increases, the liquid inside the first water bottle enters the second water bottle, causing the liquid level in the first water bottle to decrease and the liquid level in the second water bottle to increase. This increases the pressure difference between the first and second water bottles, which is then determined to be the exhalation state.

[0018] When the internal pressure of the first water bottle decreases, liquid from the second water bottle enters the first water bottle, causing the liquid level in the first water bottle to rise and the liquid level in the second water bottle to fall. This reduces the pressure difference between the first and second water bottles, indicating an air intake state.

[0019] In the above technical solution of the present invention, the ventilator triggering auxiliary component includes a first water bottle, an intermediate structure, and a cap structure connected in sequence; a second water bottle is disposed inside the first water bottle, the bottom of the second water bottle is conductively connected to the bottom of the first water bottle through a conduit, and the upper part of the second water bottle is connected to the intermediate structure; the surface of the intermediate structure is provided with a collection unit, a first conductive connector, and a second conductive connector, the collection unit including a first collection port and a second collection port, the first collection port being conductively connected to the inside of the second water bottle through the first conductive connector, and the second collection port being conductively connected to the inside of the first water bottle through the second conductive connector. The present invention solves the technical problems of existing triggering structures and methods being easily affected by external factors, having a high misjudgment rate, and being poorly tolerated by patients.

[0020] In this invention, by setting up a first water bottle and a second water bottle, the first collection port is connected to the inside of the second water bottle through a first conductive connector, and the second collection port is connected to the inside of the first water bottle through a second conductive connector, thereby forming two pressure difference ranges. Under different respiratory states, the change in pressure difference corresponds to the respiratory state of the patient. The current respiratory state of the human body is determined by analyzing the pressure difference data, that is, pressure difference triggering, which serves as a respiratory triggering source.

[0021] In this invention, the differential pressure triggering method is more tolerable to patients and more stable. Compared with pressure triggering, the magnitude of the differential pressure is related to the height difference of the liquid level, which greatly reduces the misjudgment rate and avoids the influence of external pressure fluctuations on the differential pressure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a ventilator triggering assistance component according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the connector structure according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view (1) of a ventilator triggering assistance component according to an embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional view (2) of a ventilator triggering assistance component according to an embodiment of the present invention;

[0027] Figure 5 This is a differential pressure waveform diagram of a ventilator triggering auxiliary component according to an embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] 11. Connector; 111. Air inlet; 112. Pressure supply port; 113. Air outlet;

[0030] 12. Cover structure; 121. Countersunk column;

[0031] 13. Intermediate structure; 131. Extension tube; 132. First protrusion; 133. Second protrusion; 134. Stud; 135. First conductive part; 136. Second conductive part;

[0032] 14. First water bottle; 141. First threaded section;

[0033] 15. Power signal line;

[0034] 16. Acquisition unit; 161. First acquisition port; 162. Second acquisition port

[0035] 17. Second water bottle; 171. Second threaded section; 172. Tube.

[0036] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0040] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0041] Example 1:

[0042] See Figure 1-4 According to one aspect of the present invention, a ventilator triggering assistance component is provided, wherein the ventilator triggering assistance component includes: a first water bottle 14, an intermediate structure 13, and a cap structure 12 connected in sequence; a second water bottle 17 is disposed inside the first water bottle 14, the bottom of the second water bottle 17 is conductively connected to the bottom of the first water bottle 14 through a conduit 172, and the upper part of the second water bottle 17 is connected to the intermediate structure 13; a collection unit 16, a first conductive connector, and a second conductive connector are disposed on the surface of the intermediate structure 13, the collection unit 16 includes a first collection port 161 and a second collection port 162, the first collection port 161 is conductively connected to the interior of the second water bottle 17 through the first conductive connector, and the second collection port 162 is conductively connected to the interior of the first water bottle 14 through the second conductive connector.

[0043] Specifically, in this embodiment, the intermediate structure 13 is provided with an extension tube 131. One end of the extension tube 131 is connected to the connector 11. The end of the extension tube 131 connected to the connector is a pressure interface, which can be connected to the connector 11 via a flexible tube. The other end of the extension tube 131 is electrically connected to the inside of the first water bottle 14. The connector 11 is a multi-port connector, which has an air inlet 111, an air outlet 113, and a pressure supply port 112. The air inlet 111 is connected to the ventilator tubing, and the air outlet 113 is connected to the patient end. It is connected to the patient's nasal plug or mask to conduct the patient's inhalation or exhalation; the pressure supply port 112 is connected to the extension tube 131, and the pressure supply port 112 is connected to the pressure interface of the extension tube 131 through a flexible tube. The multi-port connector is a three-way connector. This invention does not impose specific limitations and can be set according to needs; one end of the extension tube 131 is connected to the breathing tubing, and the other end is connected to the internal space of the first water bottle 14. Therefore, the second collection port 162 can detect the pressure of the breathing tubing, and the two ends of the differential pressure sensor are the pressure difference between the breathing tubing and the internal space of the second water bottle 17.

[0044] Specifically, in this embodiment, the cover structure 12 is provided with a plurality of countersunk posts 121, and the cover structure 12 is threadedly connected to the intermediate structure 13 through the countersunk posts 121; the intermediate structure 13 is provided with a plurality of studs 134 that cooperate with the countersunk posts 121, and the cover structure 12 and the intermediate structure 13 are connected by screws passing through the countersunk posts 121 of the cover structure 12 in sequence and the studs 134 on the intermediate structure 13, so that the cover structure 12 and the intermediate structure 13 are fixedly connected.

[0045] Specifically, in this embodiment, the first conductive connector includes a first protrusion 132 and a first conductive portion 135; the first conductive portion is conductively connected to the interior of the first protrusion; the first protrusion 132 is connected to the first collection port 161 via a flexible tube; the first conductive portion 135 is conductively connected to the second water bottle 17; through the first conductive portion 135, the second water bottle 17 communicates with the first protrusion 132, and the first collection port 161 of the collection unit 16 can collect the pressure of the internal space of the second water bottle 17 in real time through the first conductive connector.

[0046] Specifically, in this embodiment, the second conductive connector includes a second protrusion 133 and a second conductive portion 136; the second conductive portion is conductively connected to the interior of the second protrusion; the second protrusion 133 is connected to the second collection port 162 via a flexible tube; the second conductive portion 136 is conductively connected to the first water bottle 14; through the second conductive portion 136, the first water bottle 14 communicates with the second protrusion 133, and the second collection port 162 of the collection unit 16 can collect the pressure inside the first water bottle 14 through the second conductive connector.

[0047] Specifically, in this embodiment, the bottom of the first water bottle 14 is filled with liquid, and a second water bottle 17 is disposed inside the first water bottle 14. The bottom of the second water bottle 17 is connected to the bottom of the first water bottle 14 via a conduit 172. The liquid level b in the second water bottle 17 is always below the bottom horizontal line of the second water bottle 17. When the pressure inside the first water bottle 14 increases, the liquid inside the first water bottle 14 will be forced into the second water bottle 17 by air pressure, causing the liquid level b in the second water bottle 17 to rise and the liquid level a in the first water bottle 14 to fall. That is, a pressure difference is generated between the internal space of the first water bottle 14 and the internal space of the second water bottle 17. Therefore, when When the body is in an exhalation state, a reverse pressure is generated that is opposite to the air pressure of the ventilator, which increases air resistance and raises pressure. When the pressure in the first water bottle 14 decreases, the liquid in the second water bottle 17 flows into the first water bottle 14, causing the liquid level b in the second water bottle 17 to drop and the liquid level a in the first water bottle 14 to rise. That is, a pressure difference is generated between the internal space of the first water bottle 14 and the internal space of the second water bottle 17. When the pressure difference decreases, the body is in an inhalation state. When the body is in an inhalation state, the air pressure generated by the ventilator is in the same direction as the lungs inhalation, and the gas enters the lungs. Therefore, there is negative pressure inhalation, which reduces air resistance and lowers the pressure in the breathing tube.

[0048] Specifically, in this embodiment, the first water bottle 14 is provided with a first threaded portion 141, and the first water bottle 14 is threadedly connected to the cap structure 12 through the first threaded portion 141. The internal threads on both sides of the intermediate structure 13 cooperate with the external threads of the first threaded portion 141 to realize the threaded connection between the first water-holding portion and the intermediate structure 13. The second water bottle 17 is provided with a second threaded portion 171, and the second water bottle 17 is threadedly connected to the intermediate structure 13 through the second threaded portion 171. The bottom of the intermediate structure 13 is provided with a threaded fastener that cooperates with the second threaded portion 171 to realize the threaded connection between the second threaded portion 171 and the intermediate structure 13.

[0049] Specifically, in this embodiment, the acquisition unit 16 is a differential pressure sensor, which is fixedly installed on the upper surface of the intermediate structure 13. The differential pressure sensor has a first acquisition port 161 and a second acquisition port 162. The first acquisition port 161 is connected to the first protrusion 132 of the first conductive connector through a flexible tube, and the second acquisition port 162 is connected to the second protrusion 133 of the second conductive connector through a flexible tube. The differential pressure sensor can acquire the differential pressure signal of the internal space of the first water bottle 14 and the second water bottle 17 in real time through the first acquisition port 161 and the second acquisition port 162. A power signal line 15 is provided on one side of the differential pressure sensor. The power signal line 15 is connected to the host and is used to provide power to the differential pressure sensor.

[0050] Specifically, in this embodiment, the assembly steps of the ventilator triggering auxiliary component are as follows: During assembly, firstly, the acquisition unit 16 is fixed in the slot of the intermediate structure 13. The first acquisition port 161 and the second acquisition port 162 of the acquisition unit 16 are connected to the first conductive connector and the second conductive connector through a silicone hose. Then, the cover structure 12 is fixedly connected to the intermediate structure 13 with screws. Subsequently, the second water bottle 17 is threaded to the intermediate structure 13, and liquid is filled into the first water bottle 14 according to the specified volume and threaded to the intermediate structure 13. Finally, the pressure port 112 of the three-way connector is connected to the extension tube 131, thereby completing the assembly of the ventilator triggering auxiliary component. After the assembly is completed, the air inlet 111 of the three-way connector is connected to the breathing tubing on the ventilator, and the air outlet 113 is connected to the nasal plug or mask at the patient end.

[0051] Example 2:

[0052] A method for determining the ventilator triggering status of a ventilator triggering assist component as described above includes the following steps:

[0053] Connect the ventilator triggering assist component to the patient end and the ventilator tubing respectively;

[0054] When the internal pressure of the first water bottle 14 increases, the liquid inside the first water bottle 14 enters the second water bottle 17, causing the liquid level in the first water bottle 14 to decrease and the liquid level in the second water bottle 17 to increase. This increases the pressure difference between the first water bottle 14 and the second water bottle 17, which is considered an exhalation state. In the exhalation state, a reverse air pressure opposite to the ventilator air pressure is generated, which increases air resistance and pressure.

[0055] When the internal pressure of the first water bottle 14 decreases, liquid from the second water bottle 17 enters the first water bottle 14, causing the liquid level in the first water bottle 14 to rise and the liquid level in the second water bottle 17 to fall. This reduces the pressure difference between the first water bottle 14 and the second water bottle 17, indicating an inspiratory state. During inspiratory breathing, the air pressure generated by the ventilator is in the same direction as the lungs' inhalation, causing air to enter the lungs. This creates negative pressure inhalation, reducing air resistance and lowering the pressure within the breathing tubing.

[0056] Specifically, in this embodiment, differential pressure triggering is used as the triggering source for the ventilator. The differential pressure triggering is to determine the current breathing state of the human body by analyzing the differential pressure data between the first water bottle 14 and the second water bottle 17. The data detected by the differential pressure sensor is proportional to the height difference between liquid levels a and b. This height difference is caused by the compression of the internal space of the second water bottle 17 under pressure. Within the maximum pressure fluctuation range generated by the breathing tubing, the liquid level b will not exceed the horizontal line at the bottom of the second water bottle 17, thus stabilizing the differential pressure. Even if the pressure in the breathing tubing fluctuates, the differential pressure detected by the differential pressure sensor will not fluctuate significantly. The normal breathing state can be well reflected from the differential pressure waveform, which serves as the basis for judging the triggering state of the ventilator.

[0057] Specifically, in this embodiment, see Figure 5 The horizontal axis represents each sampling point with a time interval of 10ms, and the vertical axis represents the pressure difference value at each sampling point in Pa. This allows us to obtain the periodicity of the pressure difference waveform during respiration, and thus determine the ventilator trigger state based on the pressure difference data analysis.

[0058] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A ventilator triggering assist component, characterized in that, include: The system comprises a first water bottle, an intermediate structure, and a cap structure connected in sequence. A second water bottle is located inside the first water bottle. The bottom of the second water bottle is connected to the bottom of the first water bottle via a conduit, and the upper part of the second water bottle is connected to the intermediate structure. The surface of the intermediate structure is provided with a collection unit, a first conductive connector, and a second conductive connector. The collection unit includes a first collection port and a second collection port. The first collection port is connected to the interior of the second water bottle via the first conductive connector, and the second collection port is connected to the interior of the first water bottle via the second conductive connector. The intermediate structure also includes an extension tube. One end of the extension tube is connected to a connector, and the other end is connected to the interior of the first water bottle. The connector is a multi-port connector, which has an air inlet, an air outlet, and a pressure supply port. The air inlet is used to connect to the ventilator tubing, the air outlet is used to connect to the patient, and the pressure supply port is used to connect to the extension tube.

2. The ventilator triggering assist component according to claim 1, characterized in that, The cover structure is provided with several countersunk posts, and the cover structure is threadedly connected to the intermediate structure through the countersunk posts.

3. The ventilator triggering assist component according to claim 1, characterized in that, The first conductive connector includes a first protrusion and a first conductive portion; the first conductive portion is conductively connected to the interior of the first protrusion; the first protrusion is connected to the first collection port via a flexible tube; The first conductive part is conductively connected to the second water bottle.

4. A ventilator triggering assist component according to claim 1, characterized in that, The second conductive connector includes a second protrusion and a second conductive portion; the second conductive portion is conductively connected to the interior of the second protrusion; the second protrusion is connected to the second collection port via a flexible tube; The second conductive part is conductively connected to the first water bottle.

5. A ventilator triggering assist component according to claim 1, characterized in that, The first water bottle is provided with a first threaded portion, and the first water bottle is threadedly connected to the cap structure through the first threaded portion.

6. A ventilator triggering assist component according to claim 1, characterized in that, The second water bottle is provided with a second threaded portion, and the second water bottle is threadedly connected to the intermediate structure through the second threaded portion.

7. A ventilator triggering assist component according to claim 1, characterized in that, The acquisition unit is a differential pressure sensor.

8. A method for determining the ventilator triggering state of a ventilator triggering assist component as described in any one of claims 1-7, characterized in that, Includes the following steps: Connect the ventilator triggering assist component to the patient end and the ventilator tubing respectively; When the internal pressure of the first water bottle increases, the liquid inside the first water bottle enters the second water bottle, causing the liquid level in the first water bottle to decrease and the liquid level in the second water bottle to increase. This increases the pressure difference between the first and second water bottles, which is then determined to be the exhalation state. When the internal pressure of the first water bottle decreases, liquid from the second water bottle enters the first water bottle, causing the liquid level in the first water bottle to rise and the liquid level in the second water bottle to fall. This reduces the pressure difference between the first and second water bottles, indicating an air intake state.

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