JP2011125618A - Heating/humidifying apparatus for artificial respirator - Google Patents

Abstract

When assisting breathing of a patient, a gas flow having an appropriate temperature and relative humidity is constantly supplied from a ventilator.
A heating / humidifying unit 11 for heating / humidifying a gas flow supplied from a ventilator 100, an intake path 12 connected to the heating / humidifying unit 11, and a heating / humidifying unit 11 side of the intake path 12 are provided. And a temperature / humidity detection unit 14 for detecting the temperature and relative humidity of the gas flow on the patient mouth side of the inhalation path 12. Warm humidifier 10.
[Selection] Figure 1

Description

  The present invention is a warming and humidifying device for a ventilator that supplies a patient with a gas flow having an appropriate temperature and relative humidity.

  When assisting the patient's breathing, it is necessary to supply a gas flow having an appropriate temperature and relative humidity from the ventilator. Conventional ventilators used a humidifier for ventilators with a temperature sensor installed in the inspiratory path, but only monitored and controlled the temperature of the gas flow. Humidity cannot be detected accurately, and the patient's trachea and bronchus may be damaged by supplying a dry gas flow to the patient, such as by emptying the chamber. Therefore, Patent Document 1 describes a ventilator alarm device that monitors a relative humidity of a supplied gas flow by generating a humidity sensor near a patient's mouth and generates an alarm when the relative humidity is equal to or lower than a predetermined threshold. Has been.

Japanese Patent Laid-Open No. 10-57493

  However, even if the gas flow supplied to the patient is at an appropriate relative humidity, it is difficult to detect whether the temperature of the gas flow is appropriate. There is also a risk of supplying a flow.

  The present invention is proposed in view of the above problems, and by monitoring the temperature and relative humidity of the gas flow supplied to the patient, the gas flow having an appropriate temperature and relative humidity is reliably supplied to the patient. With the goal.

A warming / humidifying device for a ventilator according to the present invention includes a warming / humidifying unit that warms and humidifies a gas flow supplied from the ventilator, an intake path connected to the warming / humidifying part, and heating of the intake path. It has a temperature detection part which detects the temperature of the gas flow by the side of a warm humidification part, and a temperature humidity detection part which detects the temperature and relative humidity of the gas flow by the side of the patient mouth of the said inhalation path.
With this configuration, for example, it is possible to constantly monitor the temperature and relative humidity of the gas flow supplied to the patient, so it is possible to supply the patient with a gas flow having an appropriate temperature and relative humidity. In addition, it is possible to prevent the heating and humidifying unit from being blown.

The warming / humidifying device for a ventilator according to the present invention compares the inspiratory path heating unit for adjusting the gas flow in the inspiratory path to a predetermined set temperature and the detected temperature at the patient mouth side detected by the temperature / humidity detecting unit. A storage unit that stores first and second reference temperatures and first and second reference relative humidity to be compared with the detected relative humidity detected by the temperature and humidity detector; the patient mouth side detection temperature; and the first and second A comparison result with two reference temperatures, or a warning output unit that gives different warnings depending on a comparison result between the detected relative humidity and the first and second reference relative humidity, and a control unit, the control unit, The patient mouth side detection temperature is compared with the first reference temperature, and when the patient mouth side detection temperature is lower than the first reference temperature, the heating humidification unit and the intake path heating unit are operated, and the control The patient mouth side detection temperature and the second group When the patient mouth side detected temperature is equal to or higher than the second reference temperature, the heating / humidifying unit and the intake path heating unit are stopped and a warning is output from the warning output unit. Compares the detected relative humidity with the first reference relative humidity, and when the detected relative humidity is less than or equal to the first reference relative humidity, activates the heating and humidifying unit, and the control unit detects the detected relative humidity. The humidity is compared with the second reference relative humidity, and when the detected relative humidity is less than or equal to the second reference relative humidity, the heating and humidifying unit and the intake path heating unit are stopped, and the warning output unit It is characterized by warning.
With the above configuration, the control unit automatically activates or stops the warming / humidifying unit based on the detected temperature on the patient mouth side detected from the temperature / humidity detection unit or the detected relative humidity, and also warns the warning output unit. When the temperature and relative humidity of the gas flow flowing in the inhalation path are not appropriate for the patient, it can be easily noticed to the outside by a warning from the warning output unit. In addition, the warning output unit issues a warning depending on the comparison result between the patient mouth side detection temperature and 1, the second reference temperature, or the comparison result between the detected relative humidity and the first and second reference relative humidity. The contents can be easily identified.

The warming / humidifying device for a ventilator according to the present invention is characterized in that the first reference relative humidity is 70% to 80% and the second reference relative humidity is 50% to 60%.
With this configuration, it is possible to more reliably supply a gas flow having an appropriate relative humidity to the patient, and to prevent airing of the warming and humidifying unit.

In the warming / humidifying device for ventilator according to the present invention, the storage unit stores a lower limit temperature and an upper limit temperature to be compared with the detected temperature of the humidifying / humidifying unit detected by the temperature detecting unit, and the warning output unit The warning is different depending on the comparison result between the warming / humidifying part side detected temperature and the lower limit temperature or the upper limit temperature, and the control unit compares the warming / humidifying part side detected temperature with the lower limit temperature, When the warming / humidifying part side detected temperature is less than the lower limit temperature, the warming / humidifying part is operated, and the control unit compares the warming / humidifying part side detected temperature with the upper limit temperature, and the warming When the humidifying part side detected temperature is equal to or higher than the upper limit temperature, the warming / humidifying part is stopped and a warning is issued from the warning output part.
With the above-described configuration, the control unit automatically activates or stops the heating / humidifying unit based on the temperature detected by the temperature detection unit, and causes the warning output unit to issue a warning.

In the warming / humidifying device for ventilators according to the present invention, the temperature / humidity sensor body of the temperature / humidity detection unit is covered with a covering member having a pair of flow holes through which the gas flow in the intake passage can flow. The bottom surface of the covering member is opened.
With the above-described configuration, the temperature and humidity sensor main body of the heating and humidity detection unit is covered with the covering member in which the pair of circulation holes and the opening hole are formed. Therefore, the pair of circulation holes flows the gas flow in the intake passage. Even if it is not arranged along the direction, it becomes possible for the gas flow to flow from the opening hole, so that the temperature / humidity detection unit can accurately detect the relative humidity.

The warming / humidifying device for a ventilator according to the present invention includes a connecting member that connects the warming / humidifying part and the intake passage, and the connecting member rises from the warming / humidifying part toward the intake passage. It is characterized by inclining.
With the above configuration, since it is inclined to rise from the warming / humidifying part toward the intake path, water in the warming / humidifying part can be prevented from flowing into the intake path.

  Since the temperature and relative humidity of the gas flow supplied to the patient can be monitored, a low or high temperature gas flow or a dry gas flow is not supplied to the patient, and the trachea and bronchus of the patient can be prevented from being damaged. In addition, it is possible to prevent the heating and humidifying unit from being blown.

The whole figure of the heating humidification apparatus for ventilators of this embodiment. The block diagram of the heating humidification apparatus for ventilators of this embodiment. The expanded longitudinal cross-sectional view of the temperature humidity detection part of this embodiment. The flowchart which shows the process sequence at the time of normal operation | movement of the heating and humidifying apparatus for ventilators of this embodiment. The flowchart which shows the process sequence in case the heating humidification part side detection temperature detected by the temperature detection part of the heating humidification apparatus for ventilators of this embodiment is less than minimum temperature. The flowchart which shows the process sequence in case the heating humidification part side detection temperature detected by the temperature detection part of the heating humidification apparatus for ventilators of this embodiment is more than upper limit temperature. The flowchart which shows the process sequence in case the patient mouth side detection temperature detected by the temperature humidity detection part of the heating humidification apparatus for ventilators of this embodiment is less than 1st reference temperature. The flowchart which shows the process sequence in case the patient mouth side detection temperature detected by the temperature humidity detection part of the heating humidification apparatus for ventilators of this embodiment is more than 2nd reference temperature. The flowchart which shows the process sequence in case the detection relative humidity detected by the temperature humidity detection part of the heating and humidification apparatus for ventilators of this embodiment is below 1st and 2nd reference | standard relative humidity.

  A heating and humidifying device for a ventilator according to this embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view of a warming / humidifying device for a ventilator according to the present embodiment, FIG. 2 is a block diagram of the warming / humidifying device for a ventilator according to the present embodiment, and FIG. 3 is an enlarged longitudinal section of a temperature / humidity detection unit according to the present embodiment. FIG.

<Configuration of heating and humidifying device for ventilator of this embodiment>
The respirator warming / humidifying device 10 includes a warming / humidifying unit 11 that warms and humidifies the gas flow supplied from the respirator 100, an intake path 12 connected to the warming / humidifying unit 11, and an intake path 12. A temperature detection unit 13 that detects the temperature of the gas flow on the heating and humidification unit 11 side, and a temperature and humidity detection unit 14 that detects the temperature and relative humidity of the gas flow on the patient mouth side of the inhalation path 12 are provided.

  The respirator warming / humidifying device 10 also includes an intake path heating unit 15 that adjusts the gas flow in the intake path 12 to a predetermined set temperature, an upper limit temperature, a lower limit temperature, first and second reference temperatures, and a first. 2, a storage unit 16 that stores the reference relative humidity, a warning output unit 17 that warns the outside, and a control unit 18. Note that the storage unit 16, the warning output unit 17, and the control unit 18 are provided inside an apparatus main body 19 described later.

  The warming / humidifying unit 11 includes a chamber 20 and a chamber heating unit 21. The chamber 20 is made of resin and includes a cylindrical main body portion 201, an inlet portion 202 connected to the ventilator 100, and an outlet portion 203 connected to the inspiratory path 12. The main body 201 can contain a predetermined amount of water W. The main body portion 201 is provided with a bottom portion 204 made of an aluminum plate or the like, and the water W in the chamber 20 is easily heated by the chamber heating portion 21.

  The chamber heating unit 21 is composed of a nichrome wire built in the upper surface of the apparatus body 19, and heats and holds the water W in the chamber 20 placed on the chamber heating unit 21 based on a predetermined set temperature. . In addition, it is more preferable that the chamber heating unit 21 is provided with a locking portion for preventing the position shift and the overturn of the chamber 20.

  The intake passage 12 is a translucent resin tube, and can be bent. The intake passage 12 is connected to the outlet 203 of the chamber 20 through a connection member 22 made of a substantially T-shaped resin. Since the connecting member 22 is formed to be inclined so as to rise from the chamber 20 toward the intake passage 12, the water W in the chamber 20 can be prevented from flowing into the intake passage 12. A temperature detection hole 221 into which the temperature detection unit 13 is inserted is formed near the end of the connection member 22 connected to the outlet 203 of the chamber 20.

  The inhalation path 12 supplies a gas flow from the ventilator 100 to the patient, while the gas flow discharged from the patient passes through an exhalation path 23 formed of a translucent resin tube and is discharged to the outside. The inhalation path 12 and the exhalation path 23 can be easily distinguished by coloring them in different colors. Note that an exhalation valve 231 is installed at one end of the exhalation path 23, and when the gas flow exhausted from the patient is exhausted to the outside, outside air does not flow from the outside.

  The inspiratory path 12 and the expiratory path 23 are connected via a Y-shaped connecting member 24 made of a translucent resin formed in a Y-shaped cylindrical shape so as to be symmetrical. The remaining one end of the Y-shaped connecting member 24 is attached with an insertion member 25 or a mask that is inserted into the patient's throat. A temperature / humidity detection hole 241 into which the temperature / humidity detection unit 14 is inserted is formed near the end of the Y-shaped connection member 24 connected to the intake path 12. A tube connected to a flow meter (not shown) is attached to the center of the Y-shaped connecting member 24 so that the flow direction of the gas flow in the inspiratory path 12 and the expiratory path 23 can be easily confirmed.

  The temperature detection unit 13 includes a temperature sensor main body 131 including a temperature sensor, and is inserted into the temperature detection hole 221 and arranged. The temperature sensor main body 131 flows in the intake passage 12 and detects the temperature of the gas flow when passing through the temperature detection unit 13. That is, the temperature detection unit 13 can detect the temperature of the gas flow on the heating / humidifying unit 11 side of the intake passage 12 at all times or at regular intervals.

  The temperature / humidity detection unit 14 includes a temperature / humidity sensor main body 141 including a digital temperature / humidity sensor and a covering member 142 that covers the temperature / humidity sensor main body 141. The temperature / humidity detection unit 14 is inserted and disposed in the temperature / humidity detection hole 241. The temperature and humidity sensor main body 141 detects the temperature and relative humidity of the gas flow when flowing in the intake passage 12 and passing through the temperature and humidity detector 14. That is, the temperature / humidity detection unit 14 can detect the temperature and relative humidity of the gas flow on the patient mouth side of the inhalation path 12 at all times or at regular intervals.

  The covering member 142 is formed in a metal cylindrical shape. As shown in FIG. 3, the covering member 142 is formed with a pair of flow holes 143 and an opening hole 144 in which the bottom surface of the covering member 142 is opened. By the pair of flow holes 143, the gas flow supplied to the patient passes through the flow holes 143 and contacts the temperature / humidity sensor main body 141, whereby the temperature and relative humidity of the gas flow in the intake passage 12 can be detected. Since the wet gas does not stay in the covering member 142 due to the opening hole 144, the relative humidity can be detected accurately. Further, since the pair of flow holes 143 and the opening hole 144 are formed, even if the pair of flow holes 143 are not along the flow direction of the gas flow in the intake passage 12, the temperature / humidity detection unit is provided from the opening hole 144. 14 is in contact with the temperature / humidity sensor main body 141, so that the accurate temperature and relative humidity of the gas flow can be detected. That is, the detected relative humidity is not affected by the angle of the flow hole 143 of the temperature / humidity detection unit 14 with respect to the flow direction of the gas flow in the intake passage 12.

  The temperature detection unit 13 and the temperature / humidity detection unit 14 are connected to each other by a cable and to the apparatus main body 19.

  The intake path heating unit 15 includes a heater wire 151 and a connector 152, and is provided in the intake path 12. The intake passage heating unit 15 heats and holds the gas flow flowing in the intake passage 12 to a predetermined set temperature. The intake path heating unit 15 heats and holds the temperature of the gas flow in the intake path 12, thereby preventing condensation in the intake path 12 resulting from a temperature difference from the outside air temperature. In other words, it is possible to limit the influence of changes in the outside temperature during the season and day and night. The connector 152 of the intake path heating unit 15 is installed at the end opposite to the end of the connection member 22 connected to the intake path 12, and is connected to the apparatus main body 19 by a cable (not shown).

  Here, the predetermined set temperature includes a set temperature on the humidifying / humidifying portion side and a set temperature on the patient mouth side. The set temperature on the warming / humidifying unit side is the set temperature of the gas flow on the heating / humidifying unit 11 side of the intake passage 12, specifically, when passing through the vicinity of the connection member 22 connected to the outlet 203 of the chamber 20. It is a set temperature of the gas flow, and the set temperature on the patient mouth side passes through the set temperature of the gas flow on the patient mouth side of the inhalation path 12, specifically, the Y-shaped connecting member 24 connected to the inhalation path 12. This is the set temperature of the gas flow. In this embodiment, the warming / humidifying part side set temperature can be set in a temperature range of 26 ° C. to 43 ° C., and the patient mouth side set temperature can be set in a temperature range of 30 ° C. to 40 ° C. For example, when the warming / humidifying part side set temperature is set to 37 ° C. and the warming / humidifying part side set temperature is set to 40 ° C., the intake passage heating unit 15 sets the gas flow flowing in the intake passage 12 to 37 ° C., respectively. Adjust to 40 ° C.

  The apparatus main body 19 includes a storage unit 16, a warning output unit 17, and a control unit 18 therein.

  The storage unit 16 is composed of a hard disk or the like, and stores a lower limit temperature, an upper limit temperature, first and second reference temperatures, and first and second reference relative humidity. In addition, the operation | work which sets a heating humidification part side setting temperature and a patient mouth side setting temperature for every use by memorize | storing previously the heating humidification part side setting temperature and patient mouth side setting temperature in the memory | storage part 16 previously. Can be omitted.

  Here, the lower limit temperature is a lower limit threshold temperature set lower than the set temperature on the warming / humidifying unit side, compared with the detected temperature on the heating / humidifying unit side, and the upper limit temperature is higher than the set temperature on the heating / humidifying unit side by a predetermined temperature. It is the set upper threshold temperature, and is compared with the detected temperature of the humidifying / humidifying part.

  The first reference temperature is a lower threshold temperature set lower than the patient mouth set temperature by a predetermined temperature, and is compared with the patient mouth detected temperature, and the second reference temperature is an upper threshold temperature set higher than the patient mouth set temperature. And is compared with the detected temperature at the patient mouth side. Further, the first reference relative humidity is 70% to 80% and is compared with the detected relative humidity detected by the temperature / humidity detection unit 14, and the second reference relative humidity is 50% to 60%. Is compared with the detected relative humidity. It is more preferable that the first reference relative humidity is 80% and the second reference relative humidity is 60%.

  In this embodiment, when the warming / humidifying unit side set temperature is set to 37 ° C. and the patient mouth side set temperature is set to 40 ° C., the storage unit 17 sets the lower limit temperature calculated by the control unit 18 to 33 ° C. The temperature stores 40 ° C. The storage unit 17 stores 37 ° C. for the first reference temperature, 43 ° C. for the second reference temperature, 80% for the first reference relative humidity, and 60% for the second reference relative humidity.

  The warning output unit 17 includes a later-described state display unit 193 in which a lamp is arranged, a buzzer (not shown), and the like. The warning output unit 17 compares the detected temperature of the humidifying / humidifying unit side with the lower limit temperature or the upper limit temperature, and detects the patient mouth side detected temperature. Based on the comparison result between the first and second reference temperatures and the comparison result between the detected relative humidity and the first and second reference relative humidity, a different warning is issued to the outside. For example, a warning is given to the outside by lighting a lamp, generating an alarm sound, or both.

  The control unit 18 includes a CPU or the like, and operates or stops the chamber heating unit 21 and the intake path heating unit 15 based on the warming / humidifying unit side set temperature and the patient mouth side set temperature, whereby the intake path 12 controls the temperature of the gas stream flowing in the interior. Further, the control unit 18 automatically sets the lower limit temperature, the upper limit temperature, and the first and second reference values that are automatically set lower or higher by a predetermined temperature when the warming / humidifying unit side set temperature and the patient mouth side set temperature are set. The temperature is calculated and output to the storage unit 16.

  The control unit 18 automatically performs a process to be described later according to a result of comparing the heating / humidifying unit side detected temperature with the lower limit temperature or the upper limit temperature. The control unit 18 also automatically processes the comparison result between the patient mouth side detected temperature and the first and second reference temperatures and the comparison result between the detected relative humidity and the first and second reference relative humidity. carry out. For example, the control unit 18 operates or stops the chamber heating unit 21 and the intake path heating unit 15, or issues a warning from the warning output unit 17 to the outside. Note that, for example, immediately after the start of gas flow supply, the warming / humidifying unit side detected temperature detected by the temperature detecting unit 13 does not satisfy the lower limit temperature, and therefore it is more preferable to set a standby time. For example, the standby time is set to 20 minutes.

  An operation unit 191, a temperature / humidity display unit 192, and a status display unit 193 are provided on the surface of the apparatus main body 19. By operating the operation unit 191, the warming / humidifying unit side set temperature and the patient mouth side set temperature can be arbitrarily set within a predetermined temperature range. For example, the settable temperature range of the heating and humidifying unit side set temperature is set to 26 ° C to 43 ° C, and the settable temperature range of the patient mouth side set temperature is set to 30 ° C to 40 ° C. The temperature / humidity display unit 192 displays the heating / humidifying unit side detection temperature, the patient mouth side detection temperature, and the detected relative humidity, and can switch the temperature and relative humidity displayed by the operation unit 191. The status display unit 193 includes a plurality of lamps corresponding to the temperature detection unit 13, the temperature / humidity detection unit 14, the chamber 20, and the like. The lamp changes its color according to the operating state of each part of the respirator warming / humidifying device 10. For example, by changing the normal state to green, the caution state to orange, and the warning state to red, the respirator is heated. The operating state of each part of the humidifier 10 can be easily visually confirmed. For example, when the operating state of the temperature / humidity detection unit 14 is a warning, a lamp corresponding to the temperature / humidity detection unit 14 is lit in red.

  In addition, although not illustrated, the apparatus main body 19 can also include a wireless transmitter including a low-power, short-range transmitter. By being connected to the wireless transmitter, the operating state of the artificial humidifier 10 can be displayed on a monitor such as a personal computer. That is, it becomes possible to monitor the heating / humidifying part side detected temperature, the patient mouth side detected temperature, and the detected relative humidity on a monitor separated from the respirator warming / humidifying device 10. In addition, when the ventilator warming / humidifying device 10 is abnormal, it is possible to display the abnormal location and the abnormal content on the monitor.

<Processing flow of the heating and humidifying device for ventilator of this embodiment>
Next, the flow of the various processes of the heating and humidifying device 10 for the ventilator will be described with reference to the flowcharts shown in FIGS. In addition, in this embodiment, a heating humidification part side set temperature is set to 37 degreeC, and a patient mouth side setting temperature is set to 40 degreeC. The lower limit temperature calculated by the controller 18 is 33 ° C., the upper limit temperature is 40 ° C., the first reference temperature is 37 ° C., the second reference temperature is 43 ° C., and the first reference relative humidity is 80 ° C. % And the second reference relative humidity is 60%.

  The flow of processing during normal operation of the respirator warming / humidifying device 10 is as shown in FIG.

  In step S101, the apparatus main body 19 is activated and the operation unit 191 is operated to set the warming / humidifying unit side set temperature to 37 ° C. and the patient mouth side set temperature to 40 ° C. When the warming / humidifying unit side set temperature and the patient mouth side set temperature are stored in the storage unit 16 in advance, step S101 is omitted and the process proceeds to step S102.

  In step S102, the ventilator 100 is activated, and the control unit 18 controls the chamber heating unit 21 and the inspiratory path heating unit based on the warming / humidifying unit side set temperature and the patient mouth side set temperature set in step S101. 15 starts heating the gas stream.

  In step S103, supply of a gas flow to the patient is started. In this embodiment, the temperature of the gas flow supplied from the ventilator 100 is 24 ° C., the relative humidity is 50%, and the gas flow flows in the warming humidifier 10 for artificial respiration and is supplied to the patient. explain. When a predetermined amount of water W in the chamber 20 is heated by the chamber heating unit 21 and the gas flow passes through the chamber 20, the temperature rises due to evaporation from the surface of the water W in the chamber 20 and is almost saturated. State (relative humidity of about 99%). Next, the substantially saturated gas flow flows from the outlet portion 203 of the chamber 20 to the intake passage 12, and the temperature of the gas flow is detected at about 38 ° C. by the temperature detection unit 13 disposed near the outlet of the chamber 20. The Thereafter, the gas flow flows in the inhalation path 12 while being heated by the inhalation path heating unit 15, and the temperature of the gas flow is about 40 ° C. and the relative humidity is about 85% in the temperature / humidity detection unit 14 disposed near the patient's mouth. Be detected. The gas flow passes through the insertion member 25 installed at the patient's mouth and is naturally cooled before being supplied to the patient. The temperature of the gas flow is 37 ° C. and the relative humidity is 95%. A gas stream with a suitable temperature and relative humidity is supplied. It is preferable that the control unit 18 lights the lamps corresponding to the temperature detection unit 13 and the temperature / humidity detection unit 14 displayed on the status display unit 193 in green indicating normal time.

  In step S104, when the supply of the gas flow to the patient is normally completed, the supply of the gas flow to the patient is stopped. In step S105, the control unit 18 stops the chamber heating unit 21 and the intake path heating unit 15. To do.

  The flow of processing when the temperature detection unit 13 detected by the temperature detection unit 13 of the respirator warming / humidifying device 10 is less than the lower limit temperature is as shown in FIG. Note that steps S201 to S203 are omitted because they are the same as steps S101 to S103 described above.

  In step S204, the control unit 18 compares the detected temperature with the heating / humidifying unit side with 33 ° C., which is the lower limit temperature stored in the storage unit 16, and if the detected temperature with the heating / humidifying unit side is less than the lower limit temperature, Proceed to step S205.

  In step S205, the control unit 18 increases the set temperature from the set temperature 37 ° C. at the start of the heating / humidifying unit side so that the detected temperature of the heating / humidifying unit side becomes equal to or higher than the lower limit temperature, and operates the chamber heating unit 21. Let It is more preferable that the control unit 18 turns on the lamp corresponding to the temperature detection unit 13 of the state display unit 193 in orange and generates an alarm sound after the standby time has elapsed.

  The flow of processing when the warming / humidifying unit side detected temperature detected by the temperature detecting unit 13 of the respirator warming / humidifying device 10 is equal to or higher than the upper limit temperature is as shown in FIG. Note that steps S301 to S303 are omitted because they are the same as steps S101 to S103 described above.

  In step S304, the control unit 18 compares the detected temperature with the warming / humidifying unit side with 40 ° C which is the upper limit temperature stored in the storage unit 17, and if the detected temperature with the heating / humidifying unit side is equal to or higher than the upper limit temperature, Proceed to step S305.

  In step S <b> 305, the control unit 18 stops the chamber heating unit 21.

  In step S306, if the detected temperature of the warming / humidifying unit side is equal to or higher than the upper limit temperature after the elapse of the standby time, the control unit 18 gives a warning from the warning output unit 17 to the outside. For example, the control unit 18 lights a lamp corresponding to the temperature detection unit 13 of the state display unit 193 in red and generates an alarm sound.

  The flow of processing when the detected temperature at the patient mouth side detected by the temperature / humidity detector 14 of the respirator warming / humidifying device 10 is lower than the first reference temperature is as shown in FIG. Note that steps S401 to S403 are omitted because they are the same as steps S101 to S103 described above.

  In Step S404, the control unit 18 compares the patient mouth side detection temperature with 37 ° C. which is the first reference temperature stored in the storage unit 16, and if the patient mouth side detection temperature is less than the first reference temperature, Proceed to step S405.

  In step S405, the control unit 18 increases the set temperature from the set temperature 37 ° C. at the start of the heating / humidifying unit side so that the detected temperature at the patient mouth side is equal to or higher than the first reference temperature, and The path heating unit 15 is operated. It is preferable that the control unit 18 turns on the lamp corresponding to the temperature / humidity detection unit 14 of the status display unit 193 in orange and generates an alarm sound.

  The flow of processing when the detected temperature on the patient mouth side detected by the temperature / humidity detection unit 14 of the respirator warming / humidifying device 10 is equal to or higher than the second reference temperature is as shown in FIG. Note that steps S501 to S503 are omitted because they are the same as steps S101 to S103 described above.

  In step S504, the control unit 18 compares the detected temperature on the patient's mouth side with the second reference temperature 43 ° C. stored in the storage unit 16. If the detected temperature is equal to or higher than the second reference temperature, the control unit 18 proceeds to step S505. move on.

  In step S505, the control unit 18 stops the chamber heating unit 21 and the intake path heating unit 15.

  In step S506, the control unit 18 issues a warning from the warning output unit 17 to the outside. For example, the control unit 18 causes a lamp corresponding to the temperature / humidity detection unit 14 of the status display unit 193 to light red and generates an alarm sound.

  The flow of processing when the detected relative humidity detected by the temperature / humidity detecting unit 14 of the respirator warming / humidifying device 10 is equal to or lower than the first and second reference relative humidity is as shown in FIG. Note that steps S601 to S603 are omitted because they are the same as steps S101 to S103 described above.

  In step S604, the control unit 18 compares the detected relative humidity with 80% which is the first reference relative humidity stored in the storage unit 16, and the detected relative humidity is 80% or less which is the first reference relative humidity. If YES, the process proceeds to step S605.

  In step S <b> 605, the control unit 18 operates the chamber heating unit 21 in order to make the gas flow flowing in the intake passage 12 sufficiently saturated in the chamber 20. However, if the water W in the chamber 20 starts to run short, even if the chamber heating unit 21 is operated in step S605, the relative humidity of the gas flow continues to decrease, and the process proceeds to step S606.

  In step S606, the control unit 18 compares the detected relative humidity with 60% which is the second reference relative humidity stored in the storage unit 16, and the detected relative humidity is 60% or less which is the second reference relative humidity. If YES, the process proceeds to step S607.

  In step S607, the control unit 18 stops the chamber heating unit 21 and the intake path heating unit 15, and in step S608, the control unit 18 issues a warning from the warning output unit 16 to the outside. For example, the control unit 18 turns on a lamp corresponding to the chamber 20 of the state display unit 193 in red and generates an alarm sound. Thereby, since it can be confirmed easily that the water W in the chamber 20 is insufficient, it is possible to prevent the chamber 20 from being sprinkled beforehand, and it is possible to cope with the addition of water in the chamber 20. .

<Effect of this embodiment>
By monitoring the temperature and relative humidity of the gas flow supplied to the patient, a gas flow having an appropriate temperature and relative humidity can be supplied to the patient, and the trachea and bronchus of the patient can be prevented from being damaged. Further, it is possible to prevent the chamber from being blown.

[Modifications of Embodiment, etc.]
In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification is specified by changing these partial configurations to other configurations disclosed in the present specification within the applicable range, or these Including those specified by adding other configurations disclosed in this specification, or those obtained by deleting these partial configurations to the extent that partial effects can be obtained, These modifications are also included.

  The ventilator device 10 of the present embodiment is inserted directly into the patient's throat and supplies a gas flow, but the gas flow can also be supplied by putting a mask on the patient's mouth. Switching may be performed by operating the operation unit 191 of the apparatus main body 19.

  The temperature sensor main body 131 of the respirator warming / humidifying device 10 includes only a temperature sensor. However, when a digital temperature / humidity sensor is applied in the same manner as the temperature / humidity sensor main body 141, the temperature detection unit 13 also detects the temperature and relative humidity. Therefore, it is possible to detect a more accurate temperature and relative humidity of the gas flow flowing in the intake passage 12.

  INDUSTRIAL APPLICABILITY The present invention can be used for a ventilator that supplies a patient with a gas flow having an appropriate temperature and relative humidity.

DESCRIPTION OF SYMBOLS 10 ... Heating / humidifying device for ventilators 11 ... Heating / humidifying part 12 ... Intake path 13 ... Temperature detection part 14 ... Temperature / humidity detection part 15 ... Intake path heating part 16 ... Memory | storage part 17 ... Warning output part 18 ... Control part 19 DESCRIPTION OF SYMBOLS ... Main body 20 ... Chamber 21 ... Chamber heating part 22 ... Connection member 23 ... Exhalation path 24 ... Y-shaped connection member 25 ... Insertion member 100 ... Respirator 131 ... Temperature sensor main body 141 ... Temperature / humidity sensor main body 142 ... Covering member 143 ... circulation hole 144 ... opening hole 151 ... heater wire 152 ... connector 191 ... operation part 192 ... temperature / humidity display part 193 ... status display part 201 ... main body part 202 ... inlet part 203 ... exit part bottom part ... 204 221 ... temperature detection hole 231 ... Expiratory valve 241 ... Temperature / humidity detection hole W ... Water

Claims (6)

A heating and humidifying unit for heating and humidifying the gas flow supplied from the ventilator;
An intake path connected to the heating and humidifying unit;
A temperature detection unit for detecting the temperature of the gas flow on the heating and humidifying unit side of the intake path;
A temperature and humidity detector for detecting the temperature and relative humidity of the gas flow on the patient mouth side of the inhalation path;
A heating and humidifying device for a ventilator, characterized by comprising: An intake passage heating unit for adjusting a gas flow in the intake passage to a predetermined set temperature;
The first and second reference temperatures to be compared with the patient mouth side detection temperature detected by the temperature and humidity detection unit and the first and second reference relative humidity to be compared with the detection relative humidity detected by the temperature and humidity detection unit. A storage unit for storing;
A warning output unit that gives different warnings depending on a comparison result between the patient mouth side detection temperature and the first and second reference temperatures, or a comparison result between the detection relative humidity and the first and second reference relative humidity;
A control unit;
Have
The control unit compares the patient mouth side detection temperature with the first reference temperature, and when the patient mouth side detection temperature is lower than the first reference temperature, the heating humidification unit and the intake path heating unit, And
The control unit compares the patient mouth side detection temperature with the second reference temperature, and when the patient mouth side detection temperature is equal to or higher than the second reference temperature, the heating humidification unit and the inhalation path heating unit And stop the warning from the warning output unit,
The control unit compares the detected relative humidity with the first reference relative humidity, and when the detected relative humidity is less than or equal to the first reference relative humidity, activates the heating and humidifying unit,
The control unit compares the detected relative humidity with the second reference relative humidity, and stops the heating and humidifying unit and the intake path heating unit when the detected relative humidity is equal to or lower than the second reference relative humidity. The warming / humidifying device for ventilators according to claim 1, wherein a warning is issued from the warning output unit.   The warming and humidifying device for a ventilator according to claim 2, wherein the first reference relative humidity is 70% to 80%, and the second reference relative humidity is 50% to 60%. The storage unit stores a lower limit temperature and an upper limit temperature to be compared with the heating / humidifying unit side detection temperature detected by the temperature detection unit,
The warning output unit gives a different warning depending on the comparison result between the heating / humidifying unit side detection temperature and the lower limit temperature, or the upper limit temperature,
The control unit compares the heating / humidifying unit side detected temperature with the lower limit temperature, and when the heating / humidifying unit side detected temperature is less than the lower limit temperature, activates the heating / humidifying unit,
The control unit compares the detected temperature of the warming / humidifying unit with the upper limit temperature, and stops the warming / humidifying unit when the detected temperature of the warming / humidifying unit side is equal to or higher than the upper limit temperature, and the warning The warming / humidifying device for ventilators according to claim 2 or 3, wherein an alarm is given from the output unit.   The temperature / humidity sensor main body of the temperature / humidity detection unit is covered with a covering member formed with a pair of flow holes through which the gas flow in the intake passage can flow, and the bottom surface of the covering member is opened. The warming / humidifying device for a ventilator according to any one of claims 1 to 4. A connecting member that connects the warming and humidifying unit and the intake path;
The said connection member inclines so that it may rise toward the said inhalation | air-intake path | route from the said heating humidification part, The heating humidification apparatus for ventilators in any one of Claims 1-5 characterized by the above-mentioned.

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