JPH09276407A - Temperature and humidity display device used for artificial respiration circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temp. and humidity display device with which a high-accuracy alarm display is attained by using the temp. and humidity display device which calculates the absolute humidity by detecting the relative humidity and temp. in an artificial respiration circuit and expresses the absolute satd. steam quantity and the alarm level during artificial ventilation in the form of a graph. SOLUTION: This artificial circuit is constituted by forming a temp. and humidity detecting section arranged with a temp. sensor and humidity sensor in proximity near the patient side mouth part of the artificial respiration circuit and connecting this detecting section to the temp. and humidity display device. The absolute humidity obtd. by calculating the relative humidity in the respiration circuit measured by the humidity sensor and the temp. in the respiration circuit measured by the temp. sensor by adding the satd. steam quantity preset by the temp. and humidity display device thereto is calculated as an answer value. The absolute satd. steam quantity and the alarm level are constantly displayed in the form of the graph on the display of the temp. and humidity display device, by which the answer value is flickered and displayed 6 on the display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the relative humidity and temperature in an artificial respiration circuit, calculates the absolute humidity from the detected values, and displays the temperature and humidity as a graph on a display device having a display as a display means. The present invention relates to a display device.

[0002]

2. Description of the Related Art Conventionally, in this type of artificial respirator for the purpose of artificial ventilation, a heating / humidifying device is provided for heating and humidifying the inhaled air for maintaining or assisting the respiration of a patient. It is attached in the circuit.

Normally, when a human body inhales air, the inhaled air is heated and humidified on the mucous membrane surface of the mouth and nose, and reaches an appropriate temperature and humidity when it reaches the alveoli. However, in the case of a patient who needs artificial ventilation for medical purposes, for example, if the inhaled air during artificial ventilation is not heated and humidified, the inhaled air directly flows into the patient's bronchi, alveoli, etc. Because of this, there is a risk of ventilation failure, and there is a strong possibility that various disorders will occur.

In order to avoid such a situation, a heating and humidifying device is often provided in the artificial respiration circuit for the purpose of heating and humidifying the inhaled air during artificial ventilation. Humidifiers, humidifiers, jet nebulizers, ultrasonic nebulizers, artificial noses, etc. can be mentioned, but warm humidifiers are the closest to natural humidification and are often used while wearing a respirator.

[0005]

[Problems to be solved] However, heating and humidification of inhaled air during artificial ventilation is extremely important. However, in actual medical treatment, it is only necessary to check the temperature displayed on the humidifier to check the inhaled air There are few occasions to measure temperature and humidity, and they tend to be neglected.

In addition, a unitary display means is often used as the display temperature means that has been permanently installed in the conventional humidifiers.
The fact is that there are few clear and appropriate expressions regarding the temperature and humidity conditions in the breathing circuit.Furthermore, it is important not only to display information only on the relative humidity and temperature in the breathing circuit, but also to warm and humidify the inhaled air. In consideration of the nature, it is desired to simply display the humidity condition in the breathing circuit by comparing it with a warning level.

[0007]

It is an object of the present invention, as a result of intensive studies focusing on the above reasons, that importance is attached to the heating and humidification of inhaled air during artificial ventilation, and a clear and appropriate status display of the inhaled air in an artificial respiration circuit. Focusing on, the absolute humidity was calculated by detecting the relative humidity and temperature in the breathing circuit, and the temperature and humidity display device that expressed the absolute saturated water vapor amount and the alarm level during artificial ventilation in a graph was used to It is intended to create and provide a temperature / humidity display device capable of achieving a warning display.

[0008]

The structure of the present invention is an artificial respiration system in which a temperature / humidity detecting section in which a temperature sensor and a humidity sensor are arranged close to each other is formed near the patient's mouth of the artificial respiration circuit, and which is connected to a temperature / humidity display device. Absolute humidity obtained by calculating the relative humidity in the breathing circuit measured by the humidity sensor and the temperature in the breathing circuit measured by the temperature sensor by adding the saturated water vapor amount preset by the temperature and humidity display device. Is calculated as an answer value, the absolute saturated water vapor amount and the alarm level are graphed and constantly displayed on the display of the temperature and humidity display device, and the answer value is blinked on the display.

[0009]

The function of the present invention is to calculate the absolute humidity as a response value by calculating the relative humidity and temperature during artificial ventilation and the saturated water vapor amount, and display the absolute saturated water vapor amount on the display of the temperature and humidity display device. The alarm level is displayed as a graph and is constantly displayed, and the absolute humidity response value is displayed in a blinking manner on the display. In consideration of the importance of heating and humidifying the inhaled air in the breathing circuit, a warning is displayed. The operation as a device is also achieved at the same time.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A temperature / humidity display device of the present invention which achieves the above object will be described with reference to the drawings of the embodiments.

FIG. 1 is an explanatory view of a graph displayed on the display of the embodiment of the temperature and humidity display device of the present invention, and FIG. 2 is a schematic explanatory view of the whole artificial respiration circuit of the present invention.

The present invention relates to a temperature / humidity display device which detects relative humidity and temperature in an artificial respiration circuit, calculates absolute humidity from the detected values, and graphs and displays the absolute humidity on a display device. And an artificial respiration circuit in which an inhalation side circuit consisting of the respirator main body 1 and the humidifier / humidifier 2 and an expiratory side circuit connected to the respirator main body 1 via the patient-side mouth part 3 are connected by a hollow tube. A temperature / humidity detecting section 4 in which a temperature sensor and a humidity sensor are arranged close to each other in the hollow tube is formed in the vicinity of the patient side mouth section 3, and the temperature / humidity detecting section 4 is connected to a temperature / humidity display device 5. Artificial respiration circuit A
In, the relative humidity in the breathing circuit measured by the humidity sensor and the temperature in the breathing circuit measured by the temperature sensor are set in advance in the temperature / humidity display device 5 connected to the temperature / humidity detection unit 4, and the saturated water vapor amount is preset. The calculated absolute humidity is calculated as an answer value, and the absolute saturated water vapor amount and the alarm level are graphed and constantly displayed on the display of the temperature / humidity display device 5, and the answer value is displayed. A blinking display 6 is provided above.

That is, the state of the breathing circuit of the present invention will be described with reference to the embodiment shown in FIG. 2. An inhalation side circuit comprising a respirator body 1 and a heating / humidifying device 2 having heating means such as a heater, An artificial respiration circuit in which the expiratory side circuit connected to the respiratory body 1 through the patient side mouth section 3 is communicated with a hollow tube of a form normally used in the respiration circuit,
A temperature / humidity detection unit in which a small temperature sensor such as a thermistor and a thin plate-like humidity sensor are arranged in proximity to each other in the hollow tube in the vicinity of the patient-side mouth section 3 of the breathing circuit so that they are substantially parallel to each other. 4 is formed.

Next, the temperature / humidity detecting unit 4 is connected to the temperature / humidity display device 5 by means of an electric cable or the like, and the detected value of relative humidity in the breathing circuit and the temperature obtained by the temperature / humidity detecting unit 4 are detected. Is sent to the temperature / humidity display device 5 having a calculation mechanism such as a CPU.

Then, the temperature and humidity display device 5 calculates a saturated water vapor amount set in advance by adding the detected value of the relative humidity and the temperature to calculate the absolute humidity in the artificial respiration circuit of the present invention as a response value. It is to be calculated.

The display means in the temperature / humidity display device 5 of the present invention will be described with reference to the embodiment shown in FIG. 1. The horizontal axis of the coordinates displayed on the display represents the temperature in the breathing circuit and the vertical axis represents the absolute value. The numerical value of the humidity is fixedly displayed, and the numerical value of the absolute saturated water vapor amount proportional to the temperature in the breathing circuit calculated in advance is displayed in a graph. This absolute saturated water vapor amount is calculated by the conventionally known calculation method based on the temperature in the breathing circuit, and is displayed constantly on the display of the present invention in a gentle curve.

Next, it is needless to say that a predetermined ratio of absolute humidity in the breathing circuit during artificial ventilation is an essential condition for properly performing artificial ventilation, and the absolute humidity in the breathing circuit has a proper value. The border line that warns that there is not is set in the temperature / humidity display device 5 in advance as a warning value, and is displayed on the display of the present invention as a display means to a position parallel to the horizontal axis of the coordinates (in FIG. 1). By displaying a constant horizontal line (dotted line display), the warning level can be visually recognized. In addition, the setting of the warning level by the dotted line display of the present invention is a display line which can be moved up and down on the display according to the condition of artificial ventilation.

As a result, the absolute saturated water vapor amount that is constantly displayed on the display of the temperature / humidity display device 5 and the alarm level related to the absolute humidity in the breathing circuit are always recognized, and the temperature and humidity are detected during this state. The relative humidity and temperature detected by the unit 4 are added to the temperature / humidity display device 5 by a preset amount of saturated water vapor, and the absolute humidity response value obtained by calculation is blinked in the graph on the display of the present invention. By comparing the position with the above-mentioned warning level, it is judged whether or not artificially appropriate artificial ventilation is being performed, and when the blinking display 6 falls below the warning level, the temperature / humidity display device 5 displays. Proper and stable artificial ventilation can be performed by sounding an internal alarm buzzer, etc. to warn and adjusting the heating humidifier in the artificial respiration circuit to correct it.

As another embodiment of the present invention, the display / display means of the temperature / humidity display device 5 uses a known display / display device, and if a large amount of information is used for display switching, artificial ventilation can be performed. It is possible to display and display various kinds of information. For example, if the flow of the relative humidity detected by the temperature / humidity detection unit 4 according to time is displayed with a wavy line, the balance status of the amount of water given to the patient in the breathing circuit can be recognized. Therefore, it can contribute to the situation where artificial ventilation is more appropriately performed.

[0020]

According to the present invention, which has the above-mentioned structure, the relative humidity and the temperature measured in the artificial respiration circuit are calculated by adding the saturated water vapor amount preset by the temperature and humidity display device to calculate the absolute humidity. It is to calculate, by displaying the absolute humidity in the breathing circuit in a blinking state while the display of the temperature / humidity display device of the present invention constantly expresses a certain condition that is graphed, The situation can be easily recognized, the unexpected situation in artificial ventilation is avoided, and the safety to the patient is enhanced.Furthermore, the use of a general display device improves the operability and provides more appropriate artificial ventilation. It is a very significant invention because it is epoch-making and highly practical, and its contribution is immeasurable.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a graph displayed on a display of an embodiment of a temperature / humidity display device of the present invention.

FIG. 2 is a schematic explanatory view of the entire artificial respiration circuit of the present invention.

[Explanation of symbols]

 A Artificial respiration circuit 1 Respirator body 2 Heater / humidifier 3 Patient mouth 4 Temperature / humidity detector 5 Temperature / humidity display device 6 Flashing display

Claims (1)

[Claims] Claim: What is claimed is: 1. An artificial respiration circuit used for artificial ventilation, wherein an inhalation side circuit consisting of a respirator main body and a heating / humidifying device, and an expiratory side circuit connected to the respirator main body through a patient side opening are hollow. A temperature / humidity detection unit, in which a temperature sensor and a humidity sensor are arranged close to each other in the hollow tube, is formed in the vicinity of the patient-side mouth of the artificial respiration circuit communicated by the tube, and the temperature / humidity detection unit displays the temperature and humidity. In the artificial respiration circuit connected to the device, the relative humidity in the respiration circuit measured by the humidity sensor,
The temperature in the breathing circuit measured by the temperature sensor and the temperature / humidity display device connected to the temperature / humidity detection unit were added to the preset amount of saturated water vapor, and the absolute humidity obtained by calculation was calculated as the response value. A temperature / humidity display for use in an artificial respiration circuit characterized in that an absolute saturated water vapor amount and an alarm level are graphically and constantly displayed on the display of the temperature / humidity display device, and the answer value is blinked on the display. apparatus.