Resuscitator
First Claim
1. A resuscitator for ventilating a patient comprising:
- a ventilator mask means for sealingly surrounding the patient'"'"'s mouth and nose;
a gas flow manifold having first, second, and third gas flow passage means for delivering ventilating gas from a source of ventilating gas to said mask means;
means for operatively coupling said third gas flow passage means to said mask means;
a manually collapsible gas receptacle;
means for operatively coupling said manually collapsible gas receptacle to said first gas flow passage means;
said second gas flow passage means being in flow communication with a source of ventilating gas;
said first gas flow passage means being operatively coupled to said third gas flow passage means and said second gas flow passage means being operatively coupled to said first gas flow passage means;
first one-way flow valve means mounted intermediate said second and first gas flow passage means for preventing flow from said first gas flow passage means to said second gas flow passage means and for allowing flow from said second gas flow passage means to said first gas flow passage means;
second one-way flow valve means mounted intermediate said first and third gas flow passage means for preventing flow from said third gas flow passage means to said first gas flow passage means and allowing flow from said first gas flow passage means to a said third gas flow passage means;
said first one-way flow valve means and said second one-way flow valve means being mounted so that when said manually collapsible gas receptacle is collapsed, said first one-way flow valve means prevents flow from said first gas flow passage means to said second gas flow passage means and said second one-way flow valve means allows flow fromsaid first gas flow passage means to said third gas flow passage means, and, when said manually collapsible gas receptacle expands, said first one-way flow valve means allows flow from said second gas flow passage means to said first gas flow passage means and said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means,said third gas flow passage means including gas outlet means and means for closing said gas outlet means when said second one-way flow valve means allows flow from said first to said third gas flow passage means; and
air escape means mounted to a wall of said gas flow manifold and in flow communication with said gas outlet means, said air escape means including manually adjustable air vent means for controlling a minimum pressure at which air is allowed to pass from said third gas flow passage means through said gas outlet means and to atmosphere when said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means, thereby to provide positive end expiratory pressure (PEEP).
1 Assignment
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Accused Products
Abstract
A resuscitator for ventilating a patient is provided which includes a ventilator mask, a manually collapsible gas receptacle, a gas flow manifold having three gas flow passages for delivering ventilating gas from a source of ventilating gas to the mask. The third gas flow passage is coupled to the mask, the first gas flow passage is coupled to the gas receptacle, and the second gas flow passage is in flow communication with a source of ventilating gas. A one-way flow valve is mounted intermediate the second and first gas flow passages and a one-way flow valve is mounted intermediate the first and third gas flow passages. The one-way flow valves are mounted so that when the gas receptacle is collapsed, the one flow valve prevents flow from the first gas flow passage to the second gas flow passage and the other flow valve allows flow from the first gas flow passage to the third gas flow passage. A gas outlet is provided in the third gas flow passage which is closed when there is flow from the first to the third gas flow passage. Finally, an air escape device is mounted to a wall of the gas flow manifold and in flow communication with the gas outlet, the air escape device being manually adjustable to control a minimum pressure at which air is allowed to pass through the gas outlet and to atmosphere.
57 Citations
22 Claims
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1. A resuscitator for ventilating a patient comprising:
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a ventilator mask means for sealingly surrounding the patient'"'"'s mouth and nose; a gas flow manifold having first, second, and third gas flow passage means for delivering ventilating gas from a source of ventilating gas to said mask means; means for operatively coupling said third gas flow passage means to said mask means; a manually collapsible gas receptacle; means for operatively coupling said manually collapsible gas receptacle to said first gas flow passage means; said second gas flow passage means being in flow communication with a source of ventilating gas; said first gas flow passage means being operatively coupled to said third gas flow passage means and said second gas flow passage means being operatively coupled to said first gas flow passage means; first one-way flow valve means mounted intermediate said second and first gas flow passage means for preventing flow from said first gas flow passage means to said second gas flow passage means and for allowing flow from said second gas flow passage means to said first gas flow passage means; second one-way flow valve means mounted intermediate said first and third gas flow passage means for preventing flow from said third gas flow passage means to said first gas flow passage means and allowing flow from said first gas flow passage means to a said third gas flow passage means; said first one-way flow valve means and said second one-way flow valve means being mounted so that when said manually collapsible gas receptacle is collapsed, said first one-way flow valve means prevents flow from said first gas flow passage means to said second gas flow passage means and said second one-way flow valve means allows flow fromsaid first gas flow passage means to said third gas flow passage means, and, when said manually collapsible gas receptacle expands, said first one-way flow valve means allows flow from said second gas flow passage means to said first gas flow passage means and said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means, said third gas flow passage means including gas outlet means and means for closing said gas outlet means when said second one-way flow valve means allows flow from said first to said third gas flow passage means; and air escape means mounted to a wall of said gas flow manifold and in flow communication with said gas outlet means, said air escape means including manually adjustable air vent means for controlling a minimum pressure at which air is allowed to pass from said third gas flow passage means through said gas outlet means and to atmosphere when said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means, thereby to provide positive end expiratory pressure (PEEP). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A gas flow manifold for a resuscitator for ventilating a patient comprising:
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housing; first, second, and third gas flow passage means defined within said housing for delivering ventilating gas from a source of ventilating gas to the patient; means for operatively coupling said third gas flow passage means to a ventilator mask for sealingly surrounding the patient'"'"'s mouth and nose; means for operatively coupling a manually collapsible gas receptacle to said first gas flow passage means; said second gas flow passage means being in flow communication with a source of ventilating gas; said first gas flow passage means being operatively coupled to said third gas flow passage means and said second gas flow passage means being operatively coupled to said first gas flow passage means; first one-way flow valve means mounted intermediate said second and first gas flow passage means for preventing flow from said first gas flow passage means to said second gas flow passage means and allowing flow from said second gas flow passage means tos aid first gas flow passage means; second one-way flow valve means mounted intermediate said first and third gas flow passage means for preventing flow from said third gas flow passage means to said first gas flow passage means and allowing flow from said first gas flow passage means to said third gas flow passage means; said first one-way flow valve meand and said second one-way flow valve means being mounted so that when said manually collapsible gas receptacle is collapsed, said first one-way flow valve means prevents flow froms aid first gas flow passage means to said second gas flow passage means and sadi second one-way flow valve means allows flow from said first gas flow passage means to said third gas flow passage means and, when said manually collapsible gas receptacle expand, said first one-way flow valve means allows flow from said second gas flow passage means to aid first gas flow passage means and said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means; said third gas flow passage means including gas outlet means and means for closing said gas outlet means when said second one-way flow valve means allows flow from said first to said third gas flow passage means; and air escape means mounted to a wall of said housing and in flow communication with said gas outlet means, said air escape means including a manually adjustable air vent means for controlling a minimum pressure at which air is allowed to pass from said third passage means through said gas outlet means when said second one-way flow valve means prevents flow from said third gas flow passage means to said first gas flow passage means, thereby to provide positive end expiratory pressure (PEEP). - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification