High frequency oscillatory ventilator
First Claim
1. A high frequency artificial breathing device comprising:
- a patient pass having two ends with a first end connected to a breathing gas supplying source, a second end exposed to open air through a pressure regulator and a middle portion connected to a trachea positioning tube;
a cylinder having a piston and a motor for reciprocating said piston frequently;
a vibration transmitting pass having two ends with a first end connected to said patient pass and a second end connected to said cylinder equipped with said piston which is reciprocated frequently by said motor, wherein high frequency vibration pressure generated by reciprocal movement of said piston is transmitted to gases in said patient pass;
means for absorbing some pressures generated by reciprocal movement of said piston in said cylinder, wherein said absorbing means is a soft bag connected to an outlet of said cylinder; and
a cross-sectional area regulating means for varying effective cross-sectional area of a gas passage which connects said bag to said cylinder.
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Abstract
A high frequency artificial breathing device is designed to transmit high frequency pressure vibrations generated by frequent reciprocation of a piston in a vibration producing device to a patient pass, and to vibrate gases in a patient pass. In the present invention, some pressure vibrations generated by the vibration producing device are cut off or absorbed by a cross-sectional area regulating member equipped to a vibration transmitting pass which transmits the pressure vibrations to the patient pass, a changeable volume soft bag, or a bag connected to the vibration producing device through a flow rate regulating member. Cutting off or absorption of some pressure vibrations generated by the vibration producing device varies pressure vibration amplitude transmitted to the patient pass. Therefore, when an exchange amount is adjusted by the artificial breathing device depending on the patient'"'"'s condition etc., changing a piston stroke is not required during the devise'"'"'s operation, and a normal rotary motor can be used as a motor for driving the piston.
102 Citations
12 Claims
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1. A high frequency artificial breathing device comprising:
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a patient pass having two ends with a first end connected to a breathing gas supplying source, a second end exposed to open air through a pressure regulator and a middle portion connected to a trachea positioning tube; a cylinder having a piston and a motor for reciprocating said piston frequently; a vibration transmitting pass having two ends with a first end connected to said patient pass and a second end connected to said cylinder equipped with said piston which is reciprocated frequently by said motor, wherein high frequency vibration pressure generated by reciprocal movement of said piston is transmitted to gases in said patient pass; means for absorbing some pressures generated by reciprocal movement of said piston in said cylinder, wherein said absorbing means is a soft bag connected to an outlet of said cylinder; and a cross-sectional area regulating means for varying effective cross-sectional area of a gas passage which connects said bag to said cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification