Title:
Resuscitator
United States Patent 2280050


Abstract:
The object of this invention is to provide a resuscitator designed to apply the principles of mouth to mouth insufflation for resuscitation and at the same time minimize or avoid the disadvantages of that method. The resuscitator according to this invention may be used for the reviving of still...



Inventors:
Alexander, Frederick A. D.
Martin, Charles E.
Application Number:
US43056242A
Publication Date:
04/21/1942
Filing Date:
02/12/1942
Assignee:
FOREGGER COMPANY INC
Primary Class:
International Classes:
A61M16/10; A61M16/12
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Description:

The object of this invention is to provide a resuscitator designed to apply the principles of mouth to mouth insufflation for resuscitation and at the same time minimize or avoid the disadvantages of that method. The resuscitator according to this invention may be used for the reviving of still born or prematurely born babies, children and adults and whenever resuscitation is required and necessary. The invention is embodied in a scientifically designed resuscitator instrument having the distinguishing features hereinafter set forth and illustrated in the accompanying drawing in which: Fig. 1 Is a central vertical sectional view of the instrument with parts broken away and certain accessories shown in dotted lines.

Fig. 2 is a plan view of the instrument.

Fig. 3 is a sectional view on the line 3-3 of Fig. 2.

The resuscitator comprises a tube 5 of sufficient length and diameter for conveniently and efficiently carrying out the operation of resuscitation. The blow-in end of the tube is marked 6. In this end there is inserted a mouth piece 7 preferably of glass or other suitable material. The mouth piece carries a filter tube 8 having a screen 9. The filter tube is designed to contain a gauze filter, not shown, to afford protection against infective bacteria in the exhaled and insufflated air as will be understood. The outlet end 10 of the tube 5 is fitted with a connection II having a bore 12 terminating in a nipple 13 for attaching an airway 14, shown in dotted line. The airway may be used for" insufflation directly into the trachea or for attaching an endotracheal tube when such is required. The connection 1 has an annular groove 30 adapted to receive and hold by friction a rubber face mask 31 shown in dotted lines. Either a child's or an adult's face mask may be thus attached to the instrument. A bent tube 15 is inserted into the tube 5 near the apertured connection II and leads to the bore 12.

The tube 15 has a nipple 16 outside the tube 5 for connection with an oxygen supply apparatus, not shown. Or a mercury or water manometer may be attached to the nipple 16 for calibrating the instrument. When not thus used the nipple is closed with a removable cap II.

Near the outlet end of the tube 5 there is provided a valve mechanism comprising an opening 18 in the tube adapted to be closed by a valve 19 which is carried by a spring 20 secured to the tube at 21. The tension of the spring is adjustable by means of a rider 22 which slides on a bridge 23 secured to the tube 5 as shown.

The rider has a thumb screw 24 for fixing it in position on the bridge. The resuscitator is calibrated for use upon prematurely born infants, infants and adults. For this purpose the bridge 23 has engraved thereon the indicia "prem" and "infants" and the rider has an arrow 25.

When the rider is in a position in which the arrow points to one of these words, the spring is tensioned accordingly so that the valve will open to relieve the pressure by the blowing-in operation. The rider slides along the bridge to depress and tension the spring as will be understood. The rider is fixed in its adjusted position by tightening the screw 24. Extreme tension of the spring is obtained by sliding on the bridge until it abuts a screw 26. The rider is then in "adult" position and the spring is most strongly tensioned.

The use of the instrument will be obvious from the foregoing description. Depending upon the circumstances of a case the instrument may be used for straight mouth to mouth inflation by attaching a face mask to fit airtightly on the face of the patient and then blowing through the mouth piece 7, the gauze filter having been inserted in the tube 8. Or inflation direct into the trachea may be done by attaching the airway. Oxygen may be administered through the tube 15. The valve 19 provides accurate control of the pressure under which the insufflated air is blown into the lungs of the patient. The length of the tube 5 is designed to provide for convenient handling of the instrument and enable the operator to observe directly the amount of chest expansion occurring with each insufflation. The instrument is readily portable, simple in construction and easily sterilized.

I claim: 1. A resuscitator comprising a tube for blowing air into a patient's lungs, a mouth piece in the inlet end of said tube, a connection in the outlet end of the tube for attaching thereto a face mask, a filter holder in the tube between said mouth piece and said connection and a valve mechanism supported on said tube and operatively connected with the interior thereof for controlling the pressure of the air blown into the said face mask.

2. A resuscitator according to claim 1 including a nipple in said connection for attaching an airway to the said tube.

3. A resuscitator according to claim 1 including valve adjusting means supported on said tube for adjusting said valve mechanism to regulate the required pressure for a given resuscitation operation.

4. A resuscitator according to claim 1 including a second tube inserted into the first named tube and leading to the said connection for administering oxygen to the patient under the face mask.

5. A resuscitator according to claim 1 in which said valve mechanism comprises an opening in the wall of the said tube near the outlet end thereof, a valve to close said opening, a support on the tube, a spring secured to said support and said valve for closing the valve, a movable member mounted to slide upon said support in engagement with said spring to regulate the tension thereof and visible indicia on said support for sliding said movable member to preindicated positions to regulate the pressure of the air passing into said face mask.

F. A. D. ALEXANDER.

CHARLES E. MARTIN.