KR20180065413A - Manual artificial respiration device - Google Patents

Abstract

In one embodiment of the present invention, provided is a manual artificial respiration device comprising: an air bag which can be expanded and compressed; a first valve which is disposed at a position where air is injected into the air bag to cause the air to flow only in a direction of injection into the air bag; a second valve which is disposed at a position where air is discharged from the air bag to cause the air to flow only in a direction of discharge from the air bag; a flow rate detection unit which is detachably mounted between the second valve and the air bag to detect a flow rate (discharge) of the air discharged from the air bag and to generate a measured tidal volume; a control unit which receives body information of a target body to calculate a target tidal volume of the target body, and receives the measured tidal volume from the flow rate detection unit to compare the target tidal volume with the measured tidal volume, and when the target tidal volume is different from the measured tidal volume, provides at least one of a necessary tidal volume and a necessary number of breaths per minute; and a display unit which displays, to the outside, at least one of the necessary tidal volume and the necessary number of breaths per minute provided from the control unit.

Description

[0001] The present invention relates to a manual artificial respiration device

Embodiments of the present invention relate to a passive ventilator.

Generally, a ventilator is a means of artificially supplying oxygen gas to a patient to maintain life until the patient is recovered. In recent years, while maintaining comfort to the patient during artificial respiration, To minimize structural damage to the skin.

In cardiopulmonary resuscitation, cardiac output and coronary perfusion pressure are known to be associated with increased spontaneous recovery of cardiac arrest patients. On the other hand, in previous studies, hyperventilation during CPR is known to be one of the factors that aggravate the prognosis of cardiac arrest patients. In other words, hypereosinophilia induces an increase in pressure in the thoracic cavity to reduce the blood flow to the right heart, thereby reducing the effectiveness of CPR. In addition, it impedes the compression of the heart during cardiopulmonary resuscitation, The blood flow to the heart is reduced. In addition, respiratory alkalosis induced by hyperventilation causes cerebral autonomic control disorder in surviving patients after cardiac arrest, resulting in ischemic injury of the nervous system due to reduction of intracerebral blood vessels and thereby adversely affecting the neurological prognosis of surviving patients after cardiac arrest . However, it is important to provide a defined one-time volume to prevent such respiration. However, CPR can not be measured during CPR, and excessive respiration is frequently performed.

In order to solve such problems, the embodiments of the present invention provide a passive ventilator capable of measuring the flow rate of air supplied to an actual patient and providing air in accordance with the target ventilation amount.

An embodiment of the present invention provides an air bag comprising: an air bag capable of being expanded and compressed; a first valve disposed at a position where air is injected into the air bag and allowing air to flow only in a direction to be injected into the air bag; A second valve disposed at a position where air is discharged and allowing air to flow only in a direction in which the air is discharged from the air bag; and a second valve that is detachably mounted between the second valve and the air bag, A flow rate sensing unit for sensing a discharge of the flow rate sensing unit to generate a tidal volume, calculating a target tidal volume of the target object by receiving body information of the target object, And the measured ventilation amount is compared with the target ventilation amount and the measured ventilation amount, And a display unit for externally displaying at least one of the required ventilation amount provided from the control unit and the required respiration rate per unit time, Lt; / RTI >

In one embodiment of the present invention, the flow rate sensing unit may include an area flowmeter having an air flow pipe through which the air moves.

In one embodiment of the present invention, the area type flow meter includes a magnet and includes a buoy unit for indicating a flow rate of the air moving to the air moving pipe, and the flow rate sensing unit includes at least one hall sensor ), And the measured ventilation amount can be converted using the magnet of the area type flow meter.

In one embodiment of the present invention, the body information of the object may include information selected from the key, the body weight, the age, and the sex of the object.

According to an embodiment of the present invention, an input unit for inputting the body information of the object from an external user may be further included.

In one embodiment of the present invention, the control unit may include a first selection mode in which the user provides the target ventilation amount using the key through the input unit, a second selection mode in which the target ventilation amount using the weight is provided, The target ventilation amount of the selected mode can be calculated and provided.

In one embodiment of the present invention, the control unit may further include a speaker unit that generates a warning signal when the target ventilation amount is different from the measured ventilation amount, and the passive ventilation apparatus is operated when the warning signal is input have.

In one embodiment of the present invention, the apparatus may further include a sensor unit disposed on a path through which the subject's exhalation is discharged, and measuring oxygen or carbon dioxide in the exhalation unit to generate exhalation-related information of the subject.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The passive ventilator according to the embodiments of the present invention calculates the target ventilation amount and compares the measured ventilation amount with the measured ventilation amount through the flow rate sensing unit to provide the comparison result to the user so that the user can obtain the necessary required ventilation amount or the required ventilation number per minute CPR can be performed in parallel. In addition, the passive ventilator according to an embodiment of the present invention can reduce the error by sensing the flow rate of minute air through the flow rate sensing unit including the area type flow meter, thereby reducing the influence of discharge from the patient during exhalation, .

1 is a perspective view schematically illustrating a passive type ventilator according to an embodiment of the present invention.
FIG. 2 is a view for explaining the air flow in the passive ventilator of FIG. 1. FIG.
FIG. 3 is a perspective view showing the flow rate sensing unit of FIG. 1. FIG.
4 is a perspective view showing the relationship between the flow rate sensing unit and the main body unit of FIG.
FIG. 5 is a block diagram schematically illustrating the relationship of the components of the passive ventilator of FIG. 1;
FIG. 6 is a flowchart sequentially illustrating an operation method of a passive type ventilator according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning.

In the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

In the following embodiments, when a part of a film, an area, a component or the like is on or on another part, not only the case where the part is directly on the other part but also another film, area, And the like.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

If certain embodiments are otherwise feasible, the particular process sequence may be performed differently from the sequence described. For example, two processes that are described in succession may be performed substantially concurrently, and may be performed in the reverse order of the order described.

In the following embodiments, when a film, an area, a component, or the like is referred to as being connected, not only the case where the film, the region, and the components are directly connected but also the case where other films, regions, And indirectly connected. For example, in the present specification, when a film, an area, a component, and the like are electrically connected, not only a case where a film, an area, a component, etc. are directly electrically connected but also another film, And indirectly connected electrically.

FIG. 1 is a perspective view schematically showing a passive type ventilator 10 according to an embodiment of the present invention, and FIG. 2 is a view for explaining an air flow in the passive type ventilator 10 of FIG. FIG. 3 is a perspective view showing the flow sensing unit 140 of FIG. 1, and FIG. 4 is a perspective view illustrating a relationship between the flow sensing unit 140 and the main body unit 100 of FIG. 5 is a block diagram schematically illustrating the relationship of the components of the passive ventilator 10 of Fig.

1 to 5, a passive type respirator 10 according to an embodiment of the present invention includes an air bag 110, a first valve 120, a second valve 130, a flow rate sensing unit 140 A control unit 150, and a display unit 190. In addition, the passive respiratory apparatus 10 may further include a mask unit 170 and a sensor unit (not shown).

The air bag 110 may be inflated and compressed by the pressure provided by the user. The air bag 110 may include a material having elasticity and elasticity as a portion that generates airflow as it is inflated or compressed by pressurization.

The first valve 120 may be disposed at a position where air is injected into the air bag 110 and may flow air only in a direction to be injected into the air bag 110. The second valve 130 is disposed at a position where air is discharged from the air bag 110, and allows air to flow only in a direction to be discharged from the air bag. Referring to FIG. 2, the first valve 120 and the second valve 130 may be located on the flow of air such that air flows only in one direction of the passive respiratory apparatus 10.

Specifically, when the user presses the air bag 110, the air in the air bag 110 flows toward the second valve 130. The air in the bladder 110 can be supplied to the patient and the patient's exhalation can be supplied to the second valve 130 ), And is discharged to the outside. When the user presses and releases the air bag 110, the pressure of the air bag 110 becomes small, so that air is introduced into the air bag 110. At this time, the outside air enters the air bladder 110 through the first valve 120, but air can not flow in the direction in which the second valve 130 is positioned, so that the patient's exhalation is reused Can be prevented.

The flow rate sensing unit 140 is detachably mounted between the second valve 130 and the air bag 110 and senses a discharge of the air discharged from the air bag 110 to generate a measured air flow rate can do. Conventionally, when the user pressurizes the air bag 110 to supply air to the patient, it is not known how much air is actually supplied to the patient. The patient's ventilation rate is different for each patient. If too little air is supplied, the survival rate of the patient may be lowered. If too much air is supplied, excessive respiration may occur to cause a decrease in perfusion pressure. The blood flow can be reduced. The passive ventilator 10 according to an embodiment of the present invention may include a flow rate sensing unit 140 to measure a flow rate of air actually supplied to a patient and compare the flow rate with a target ventilation rate of a patient. Here, the flow sensing unit 140 may include an area flowmeter having an air moving pipe 142 through which air moves. The area type flow meter may include a buoy unit 145 that includes a magnet and indicates a flow rate of air moving to the air moving pipe 142. The buoy unit 145 may be disposed in the air moving pipe 142 and may function as a buoy where the position is changed according to the air flow. In the area type flow meter, the buoy unit 145 is disposed while shielding the air moving pipe 142, so that the flow rate flowing at a low pressure can be finely measured. Although not shown, the buoy unit 145 is connected to an elastic member such as a spring so that air can flow only in one direction, and the flow rate of air in one direction can be measured.

On the other hand, the area type flow meter has less error even in the pulsating flow and is highly accurate when artificial respiration is performed at a high speed, and the length of the straight pipe at both ends of the air moving pipe 142 is almost unnecessary. In addition, the area type flow meter has a structure including the air moving pipe 142 and the buoy unit 145 to prevent the interference of the air flow generated during the exhalation and to prevent respiratory disturbance and measurement interference caused by secretions generated during patient breathing .

On the other hand, the flow rate sensing unit 140 is detachable from the main body unit 100 and can be used as a replacement type. The flow rate sensing unit 140 is detachably attachable and can be used after replacement or disinfection, thereby preventing cross contamination due to expiration of the patient during artificial respiration. The flow sensing unit 140 may further include at least one hall sensor 147. [ The flow rate sensing unit 140 can measure the degree of the magnetic force generated by the buoy unit 145 of the area type flow meter, the pulse signal of the magnetic force, or the magnetic flux density of the magnetic flux through the Hall sensor and convert the measured ventilation amount. Although the Hall sensor 147 is illustrated as being disposed in the main unit 100, the present invention is not limited thereto. The hall sensor 147 may be disposed in the flow sensing unit 140 and the flow sensing unit 140 may further include a communication unit 151 capable of transmitting the measured ventilation amount to the control unit 150 disposed in the main body unit 100 .

On the other hand, the control unit 150 may calculate the target ventilation amount of the target object by receiving the body information of the target object, and may receive the measured ventilation amount from the flow rate sensing unit 140 to compare the target ventilation amount and the measured ventilation amount. The control unit 150 may provide at least one of the required ventilation amount corresponding to the difference between the target ventilation amount and the measured ventilation amount, and the required ventilation number per minute. The body information of the object may be information selected from the height, weight, age, and sex of the object. When the body information of the object is provided, the control unit 150 can calculate the target amount of ventilation of the object using the body information. The American Heart Association (AHA), which has recently issued guidelines for cardiopulmonary resuscitation, has reported a ventilation rate of 8 to 10 times per minute, a one-time respiratory rate of 6 to 6 breaths per minute 7 ml / kg is recommended. Such information may be provided differently depending on environment change, body change, etc., and the controller 150 may store the information in advance and update it as needed. In one embodiment, when a guideline recommended by the American Heart Association is stored in the control unit 150, the controller 150 may calculate the target ventilation amount using the body weight and the body weight per unit volume when the patient's weight is input . In another embodiment, when the patient's key is used, the controller 150 may first calculate the ideal body weight according to the key, and then calculate the target ventilation amount using the calculated standard weight.

The display unit 190 may display at least one of the required ventilation amount provided from the control unit 150 and the required number of breaths per minute. The display unit 190 may be disposed in connection with the main body unit 100 so that the user can easily and accurately confirm the CPR during the CPR. The display unit 190 may be rotatable and angularly adjustable to minimize disturbance while the user performs CPR on the target patient. On the other hand, the display unit 190 further includes a warning light, and when the warning signal is inputted from the control unit 150, the display unit 190 can inform the user of the danger.

The mask unit 170 is connected to the second valve 130 and can be worn on the face of the object. The mask unit 170 may be removable and may have an appropriate size depending on the height, age, body weight, etc. of the object.

The sensor unit (not shown) is disposed on a path through which the exhalation of the object is discharged, and can measure oxygen or carbon dioxide of the exhalation unit to generate exhalation-related information of the object. The sensor unit (not shown) may be an oxygen (O 2) measuring sensor or a carbon dioxide (CO 2) measuring sensor. Here, the carbon dioxide measurement sensor may be an end-of-life carbon dioxide (ETCO2) measurement sensor. The sensor unit (not shown) may measure oxygen contained in the exhalation of the object, measure carbon dioxide to generate exhalation-related information, and provide the exhalation-related information to the controller 150. The control unit 150 may provide the above-described exhalation-related information to the display unit 190 together with the necessary ventilation amount or the number of respiration per minute, so that the exhalation-related information may be displayed externally. On the other hand, the passive respiratory apparatus 10 may further include a pressure gauge capable of measuring the airway pressure.

The passive type respiratory apparatus 10 may further include an input unit 180, a power unit 160, and a speaker unit 195.

The input unit 180 can input the body information of the object from the user. The input unit 180 may be installed by installing an application on the user's portable terminal, or the body information of the object may be input using the touch-type display unit. The input unit 180 may further include a selection mode input unit 181 and a power switch 183 that can select a target ventilation amount calculation mode. However, the input unit 180 does not necessarily have to be disposed in the main body unit 100. It goes without saying that the calculation mode may be selected through the touch-type display unit as described above.

The power supply unit 160 may be disposed in the main body unit 100 and may supply power. The power supply unit 160 may be connected to an external power supply unit to supply power or supply power including a battery. The power source unit 160 may be of a rechargeable type such as a lithium polymer, or may be replaced by an ordinary battery.

The speaker unit 195 may operate when a generated warning signal is input when the target ventilation amount and the measured ventilation amount are different from the control unit 150 to inform the user of the risk. The speaker unit 195 may indicate a low breathing or hyper breathing state according to the warning signal or may audibly inform the respiration rate per target minute. The user can supply an accurate amount of respiration to the target through the notification provided from the speaker unit 195 together with the display unit 190 during CPR.

FIG. 6 is a flowchart sequentially illustrating an operation method of the passive type ventilator 10 according to an embodiment of the present invention.

Referring to FIG. 6, first, when an emergency situation occurs, the user grasps the patient's state as a target and determines whether the patient is in need of CPR or acute respiratory distress syndrome, selects a CPR mode or an acute respiratory distress syndrome mode can do. In addition, the user inputs the body information of the patient before performing the CPR to the patient in the target chain (S10). The body information of the object may be information selected from the key, the weight, the age, and the sex. At this time, the user can select the target ventilation amount calculation mode through the input unit 180. [ The control unit 150 may calculate the target ventilation amount according to the input calculation mode (S20). In one embodiment, the user selects one of the first selection mode for providing the target ventilation amount using the key via the input unit 180, the second selection mode for providing the target ventilation amount using the weight, and the third selection mode for inputting the direct target ventilation amount The control unit 150 can calculate and provide the target ventilation amount of the selected mode.

Next, the control unit 150 receives the measured ventilation amount supplied to the actual patient through the flow rate sensing unit 140, and compares the target ventilation amount with the measured ventilation amount (S30). When the target ventilation amount and the measured ventilation amount are different, the control unit 150 provides the required ventilation amount or the required ventilation number per minute, and the display unit 190 may provide the required ventilation amount or the required ventilation number per minute. In another embodiment, the controller 150 may provide data including an airflow frequency indicative of a current air flow. The user can further pressurize or less pressurize the bladder according to the amount of required ventilation to be supplied, adjust the required ventilation amount, and adjust the number of times the bladder is pressed according to the required number of breaths per minute to provide a proper amount of breath to the patient.

As described above, the passive ventilator according to one embodiment of the present invention calculates the target ventilation amount, compares the measured ventilation amount with the measured ventilation amount through the flow rate sensing unit, and provides the comparison result to the user. Thus, Cardiopulmonary resuscitation can be performed according to the number of breaths. In addition, the passive ventilator according to an embodiment of the present invention can reduce the error by sensing the flow rate of minute air through the flow rate sensing unit including the area type flow meter, thereby reducing the influence of discharge from the patient during exhalation, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Passive ventilator
100: main body unit
110: air bag
120: first valve
130: second valve
140: Flow sensing unit
142: air flow tube
145: Buoy unit
147: Hall sensor
150:
160:
180: input
190:
195: speaker section

Claims (8)

An air bag capable of expanding and compressing;
A first valve disposed at a position where air is injected into the air bag and allowing air to flow only in a direction injected into the air bag;
A second valve disposed at a position where air is discharged from the air bag and allowing air to flow only in a direction to be discharged from the air bag;
A flow sensing unit mounted detachably between the second valve and the air bag and sensing a discharge of the air discharged from the air bag to generate a tidal volume;
Calculating a target tidal volume of the target object by receiving body information of the target object, receiving the measured amount of the ventilation from the flow rate sensing unit, comparing the target ventilation amount and the measured ventilation amount, and comparing the target ventilation amount and the measured ventilation amount A control unit for providing at least one of the required ventilation amount and the necessary respiration rate per minute; And
And a display unit for externally displaying at least one of the required ventilation amount provided from the control unit and the required ventilation number per minute. The method according to claim 1,
Wherein the flow sensing unit includes an area flowmeter having an air flow tube through which the air moves. 3. The method of claim 2,
Wherein the area type flow meter includes a magnet and includes a buoy unit for indicating a flow rate of the air moving to the air moving pipe,
Wherein the flow sensing unit further comprises at least one hall sensor for converting the measured ventilation volume using the magnet of the area flow meter. The method according to claim 1,
Wherein the body information of the object includes information selected from a key, a weight, an age, and a gender of the object. 5. The method of claim 4,
And an input unit for inputting the body information of the object from an external user. 6. The method of claim 5,
The control unit selects one of a first selection mode in which the user provides the target ventilation amount using the key via the input unit, a second selection mode in which the target ventilation amount using the weight is provided, and a third selection mode in which the direct target ventilation amount is input , The target ventilation amount of the selected mode is calculated and provided. The method according to claim 1,
Wherein the control unit generates a warning signal when the target ventilation amount and the measured ventilation amount are different,
Wherein the passive type respiratory apparatus further comprises a speaker unit operated when the warning signal is input. The method according to claim 1,
And a sensor unit disposed on a path through which the subject's exhalation is discharged and measuring oxygen or carbon dioxide in the exhalation unit to generate exhalation-related information of the subject.

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