Self-contained portable single patient ventilator/resuscitator
First Claim
1. A self-contained portable single patient ventilator/resuscitator capable of operating without attention for a period of time during the operation of power supply means to cyclically provide oxygen and air to a patient during an inspiratory mode and to permit the patient'"'"'s respiratory cavity to expire during an expiratory mode;
- said ventilator/resuscitator comprising;
power supply means capable of discharging oxygen over a period of time at a pressure sufficiently great to force oxygen into a patient'"'"'s lungs, said power supply meansincluding a chemical oxygen generator and outlet means;
two position valve means capable of being shifted between inspiratory and expiratory positions, said ventilator/resuscitator being in an inspiratory mode during operation of the power supply means when the two position valve means is in the inspiratory position, and the ventilator/resuscitator being in an expiratory mode when the two position valve means is in its expiratory position;
pump means capable of being operated to cause ambient air to be drawn into said pump means, to be mixed with oxygen within said pump means, and to be discharged from said pump means, said pump means including a jet orifice, a suction portion capable of receiving ambient air during operation of said pump means, and a discharge portion through which mixed oxygen enriched air is discharged during operation of said pump means, the jet orifice receiving oxygen from the power supply means when the two position valve means is in its inspiratory position;
outlet tubing having one end portion connected to the discharge portion of said pump means and another end portion including means adapted to be interconnected to a patient whereby oxygen enriched air may be delivered to the patient during the inspiratory mode of the ventilator/resuscitator;
an accumulator;
first, second, third and fourth fluid line means interconnecting the power supply with the two position valve means, the two position valve means with the jet orifice, the accumulator with the two position valve means, and the two position valve means with said suction portion of the pump means, respectively; and
primary control means, fifth fluid line means interconnecting the second fluid line means with said primary control means for delivering oxygen to said primary control means during said inspiratory mode, said primary control means, in response to an increasing pressure in said fifth fluid line means, capable of causing the two position valve means to be disposed in said inspiratory position for a first limited timed period during an inspiratory mode whereby oxygen is permitted to flow from the power supply means through the first and second fluid line means to the jet orifice and also from the accumulator to the suction portion of the pump means through the third and fourth fluid line means, and oxygen is prevented from flowing from the power supply means to the accumulator, and said primary control means, in response to a decreasing pressure in said fifth fluid line means, capable of causing the two position valve means to be disposed in said expiratory position for a second limited timed period during an expiratory mode whereby oxygen is permitted to flow from the power supply means through the first and third fluid line means to the accumulator and prevented from flowing to the jet orifice and suction portion.
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Accused Products
Abstract
A self-contained portable single patient ventilator/resuscitator of the type which has a timed cycle of operation, but which a patient can override in response to his physiological needs. The ventilator/resuscitator has a power source in the form of a chemical oxygen generator (132), fluid operated delivery means associated with the oxygen source, and control means. The delivery means includes pump means (122) associated with an ambient air filter (120), a two position valve shiftable between inspiratory and expiratory modes, an output tube (130) and a mask (10 and 110) and head harness (112). When the delivery means is in the inspiratory mode at least a portion of the oxygen output is delivered to the patient (114), and whethe delivery means is in the expiratory mode at least a portion of the oxygen output is delivered to an accumulator (124). The control means (186, 188, 190, 192) will cause the valve means (128) to cycle between its inspiratory and expiratory positions in a timed cycle established by timing modules (188, 190). The control means additionally includes pressure sensing devices (202) which are capable of causing the valve means to be shifted to an inspiratory mode when the patient initiates an inspiratory effort, and which are also capable of causing the valve means to be shifted to an expiratory mode when the pressure to the patient exceeds its set peak pressure.
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Citations
21 Claims
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1. A self-contained portable single patient ventilator/resuscitator capable of operating without attention for a period of time during the operation of power supply means to cyclically provide oxygen and air to a patient during an inspiratory mode and to permit the patient'"'"'s respiratory cavity to expire during an expiratory mode;
- said ventilator/resuscitator comprising;
power supply means capable of discharging oxygen over a period of time at a pressure sufficiently great to force oxygen into a patient'"'"'s lungs, said power supply means including a chemical oxygen generator and outlet means; two position valve means capable of being shifted between inspiratory and expiratory positions, said ventilator/resuscitator being in an inspiratory mode during operation of the power supply means when the two position valve means is in the inspiratory position, and the ventilator/resuscitator being in an expiratory mode when the two position valve means is in its expiratory position; pump means capable of being operated to cause ambient air to be drawn into said pump means, to be mixed with oxygen within said pump means, and to be discharged from said pump means, said pump means including a jet orifice, a suction portion capable of receiving ambient air during operation of said pump means, and a discharge portion through which mixed oxygen enriched air is discharged during operation of said pump means, the jet orifice receiving oxygen from the power supply means when the two position valve means is in its inspiratory position; outlet tubing having one end portion connected to the discharge portion of said pump means and another end portion including means adapted to be interconnected to a patient whereby oxygen enriched air may be delivered to the patient during the inspiratory mode of the ventilator/resuscitator; an accumulator; first, second, third and fourth fluid line means interconnecting the power supply with the two position valve means, the two position valve means with the jet orifice, the accumulator with the two position valve means, and the two position valve means with said suction portion of the pump means, respectively; and primary control means, fifth fluid line means interconnecting the second fluid line means with said primary control means for delivering oxygen to said primary control means during said inspiratory mode, said primary control means, in response to an increasing pressure in said fifth fluid line means, capable of causing the two position valve means to be disposed in said inspiratory position for a first limited timed period during an inspiratory mode whereby oxygen is permitted to flow from the power supply means through the first and second fluid line means to the jet orifice and also from the accumulator to the suction portion of the pump means through the third and fourth fluid line means, and oxygen is prevented from flowing from the power supply means to the accumulator, and said primary control means, in response to a decreasing pressure in said fifth fluid line means, capable of causing the two position valve means to be disposed in said expiratory position for a second limited timed period during an expiratory mode whereby oxygen is permitted to flow from the power supply means through the first and third fluid line means to the accumulator and prevented from flowing to the jet orifice and suction portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- said ventilator/resuscitator comprising;
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14. A self-contained portable single patient ventilator/resuscitator capable of operating without attention in a normal mode during operation of a power supply to cyclicaly force air and oxygen into a patient'"'"'s respiratory cavity during an inspiratory mode and to then permit the patient'"'"'s respiratory cavity to expire during an expiratory mode;
- said ventilator/resuscitator comprising;
power supply means of the type which, when in operation, is capable of discharging oxygen over a period of time at a pressure sufficiently great to force oxygen into a patient'"'"'s lungs; pump means having a suction portion and a discharge portion, the pump means being capable of being operated when powered by said power supply means to cause ambient air to be drawn into said pump means through said suction portion, the air to be mixed with said oxygen within said pump means, and the air and oxygen to be discharged through said discharge portion; an accumulator adapted to receive oxygen from the power supply means during exhalation and also being adapted to deliver accumulated oxygen to the pump means during inhalation; line means extending between said power supply means, said pump means, and said accumulator, said line means including first, second and third supply lines, the first supply line extending from said power supply means to said pump means, the second supply line extending from said power supply means to said accumulator, and the third supply line extending from said accumulator to said pump means; two position valve means connected to said first, second and third supply lines and, when in a first position, being capable of preventing the flow of oxygen from said power supply means to said accumulator by blocking the second supply line, and, when in a second position, being capable of preventing the flow of oxygen from said power supply means to said pump means by blocking the first and third supply lines; primary control means normally operated by the oxygen discharge by said power supply means and during operation of said power supply means being capable of causing said two position valve means to be disposed either in said first position for a first limited timed period during an inspiratory mode or to be disposed in said second position for a second limited timed period during an expiratory mode; and outlet tubing having one end portion connected to the discharge portion of said pump means, and another end portion adapted to be interconnected to a patient whereby air and oxygen may be delivered to the patient. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
- said ventilator/resuscitator comprising;
Specification