JPS5854963A - Fighting preventing apparatus in artificial respirator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes an inhalation pipe and an exhalation pipe that are commonly connected to an airway, and connects the inhalation pipe to a venturator and opens the exhalation pipe to the atmosphere via an exhalation valve. 7. Concerning an anti-aiting device in a ventilator that provides air supply operation of the pentulator and closing operation of the exhalation valve at a preset inspiratory phase. Conventionally, in this type of ventilator, If the patient loses synchronization with the ventilator, so-called fighting occurs, and the airway pressure rises abnormally due to the air supplied from the ventilator when the patient exhales. There was a problem in that negative pressure was formed in the airways, causing lung damage and adverse effects on circulatory activity. A similar problem also occurred when the patient made an @ sign or suffered from bronchospasm.

In view of the above-mentioned problems, it is an object of the present invention to provide a device that can quickly release fighting mode.An example of the implementation of the present invention will be described below with reference to the accompanying drawings.

In the drawing 111(2) indicates an inspiratory tube and an expiratory tube commonly connected to the patient's airway (&) via a Y-piece (3), said inspiratory tube (1) being connected at its upstream end to a ventilator (4).
), and the exhalation pipe (2) is opened to the atmosphere via an exhalation valve (5).

In the drawing, (6) indicates the venturator (4) and the exhalation valve (5).
5 shows an operation control device with a ventilator (6), which provides an air supply operation of the venturator (4) at a preset inspiratory phase and a closing operation of the exhalation valve (5). It looks like this.

In addition, a humidifier (7) and a pressure detector (8) consisting of a pressure-electric transducer are connected to the intake pipe (1), and a signal from the pressure detector (8) (not shown) is connected to the intake pipe (1). The patient's airway pressure is displayed on the meter. The above points are not particularly different from the conventional type described above, but according to the present invention, the detected pressure of the pressure detector (8) is set in advance. An abnormality detection device (9) is provided which operates when the specified pressure range is exceeded, and when the abnormality detection device (9) is activated, the air supply operation of the pentulator (4) and the valve closing operation of the exhalation valve (5) are stopped. .

To explain this in more detail, the abnormality detection device fit+91 is
The first and second sections compare the positive pressure level with respect to atmospheric pressure and the positive pressure level with the signals from each stage and the signal from the pressure detector (8).
It consists of a comparator Q3 (13) and a signal generator I on its output side, and when the airway pressure falls below the positive pressure setting level set by the first setter (1 (1), or the positive pressure is set by the second setter 0υ). When the level exceeds the set level, the signal generated from each comparator (12αJ) activates the signal generator α4 and generates a cancel signal, which is transmitted to the operation control device (6).
Entered above are the nine venturators (4) and exhalation valves (
5) Here, each setting device (IIαυ is capable of variable adjustment of its setting level, and the signal generator α41 is configured to adjust the generation length of the cancellation signal depending on the respiration rate. It can be set arbitrarily, such as the number of times in minutes or the number of seconds in hours.
When the cancel signal disappears, normal operation by the operation control device (6) is resumed.

Next, the results of clinical experiments according to the present invention will be explained. A patient performs 7-iteting when, for some reason, he or she suddenly inhales deeply during the expiration phase of the artificial respirator, generating positive pressure, and enters the inspiratory phase with a cough due to pain. This can be broadly divided into two cases: choking, coughing, bronchial spasm, or other causes that cause you to enter the inhalation phase even though you want to exhale, resulting in abnormal positive pressure. In reality, it is common for a combination of these two to occur, so it is necessary to be able to deal with both of these to prevent fighting.

If the patient does not disturb the synchronization with the ventilator, the airway pressure will change as shown in Figure 2a, but when fighting with abnormal positive pressure, the change in airway pressure will be the same as when the device of the present invention is not used. The result will be as shown in Figure 2. In other words, the patient performs 7-items, but before the turbulence stabilizes, air is delivered in the next expiratory phase, so the patient performs 7-items several times in a row, and the turbulence in the airway pressure does not easily subside. do not have.

On the other hand, if the device of the present invention is used, as shown in FIG.
The air supply operation in 4) and the closing operation of the exhalation valve (5) are stopped, and the patient is able to cough freely while being exposed to the atmosphere, and the patient quickly leaves the fighting state. The airway pressure is also stabilized.

FIG. 2 shows changes in airway pressure when the device of the present invention is not used, which occurs when abnormal positive pressure occurs in the inspiratory phase and shifts to 7-iteting.

If the device of the present invention is used, when an abnormal positive pressure that exceeds the positive pressure setting level P occurs, the air supply operation of the ventilator (41) and the valve closing operation of the exhalation valve (5) are stopped, and the patient is released to the atmosphere. It is now possible to breathe under this condition, and the airway pressure is as shown in Figure 2.
As shown, it stabilizes quickly.

In addition, in normal breathing shown in Fig. 2, the airway pressure is generally in the range of 0 to +5oc1rLn,o based on atmospheric pressure, so what is the positive pressure and the set level of positive pressure? , , P are set to, for example, -55 m a, O and 50 (1'll! H! O).

In this way, according to the present invention, an abnormality detection device is provided,
If there is an abnormal change in the airway pressure that exceeds the set pressure range, the pentulator's air supply operation and the exhalation valve's closing operation are immediately stopped, so the patient is protected from the occurrence of normal positive pressure or abnormal positive pressure. Immediately after breathing in an open atmosphere, 7
It has the effect of quickly relieving the pain caused by ITAINK and does not cause negative side effects such as lung damage.

[Brief explanation of drawings]

Figure g1 is a block diagram of one example of the device of the present invention, and Figure 2 is a diagram showing changes in airway pressure. (1)...Inhalation pipe (2)...Exhalation pipe (4)...Venturator (5)...Exhalation valve (8)......Pressure detector (9)...Outside abnormality detection device 26r.

Claims (1)

[Claims] The pentulator comprises an inhalation pipe and an exhalation pipe commonly connected to an airway, connects the inhalation pipe to a venturator, and opens the exhalation pipe to the atmosphere via an exhalation valve, and the pentulator at a preset inspiratory phase. The air supply valve is configured to provide an air supply operation and a valve closing operation of the exhalation valve, and is activated when the detected pressure of the pressure detector that detects the airway pressure exceeds a preset pressure range. A fighting prevention device for an artificial respirator, characterized in that an abnormality detection device is provided, and when the device is activated, both the air supply operation of the ventilator and the H valve operation of the exhalation valve are stopped.