CPR Protocol and cardiopulmonary resuscitator for effecting the same
First Claim
1. A cardiopulmonary resuscitator comprising in combination:
- a reciprocatable cardiac compressor means for cyclically compressing a patient'"'"'s chest;
a ventilating means for simultaneously inflating the patient'"'"'s lungs to a benign limiting pressure over a period encompassing at least one cycle of said compressor means; and
a ventilator output control means for;
(i) preventing retrograde and exhale flow from the patient'"'"'s lungs during the systolic portion of the cycle of said compressor means thus providing for a pressure increase in the patient'"'"'s lungs due to compression of the patient'"'"'s chest, and(ii) periodically venting the patient'"'"'s lungs.
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Accused Products
Abstract
An improved cardiopulmonary resuscitator and method of cardiopulmonary resuscitation is disclosed which involves cyclically compressing a patient'"'"'s chest and simultaneously ventilating the patient'"'"'s lungs to a safe limiting pressure over a period of time encompassing at least one complete compression cycle. Retrograde and exhale flow from the patient'"'"'s lungs is prevented during the systolic portion of the compression cycle providing for a pressure increase in the patient'"'"'s thorax due to compression of the patient'"'"'s chest. Simultaneous application of ventilation pressure to the patient'"'"'s lungs and compression of the patient'"'"'s chest creates a pressure increase in the patient'"'"'s thorax during systole which enhances perfusion. Continuous application of ventilation pressure during the diastolic portion of the compression cycle insures good tidal volume and enhanced blood gas exchange. Since the high intrapulmonary pressures created by the technique are substantially equaled by intrathoracic pressures and there is no substantial difference of pressure across the alveoli, trauma that would normally occur due to generation of differential pressures of the magnitude created by this technique in the lungs is avoided. After the patient'"'"'s lungs are ventilated to the predetermined limiting pressure over a period of time encompassing a predetermined number of compression cycles, the patient'"'"'s lungs are vented to the atmosphere.
132 Citations
25 Claims
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1. A cardiopulmonary resuscitator comprising in combination:
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a reciprocatable cardiac compressor means for cyclically compressing a patient'"'"'s chest; a ventilating means for simultaneously inflating the patient'"'"'s lungs to a benign limiting pressure over a period encompassing at least one cycle of said compressor means; and a ventilator output control means for; (i) preventing retrograde and exhale flow from the patient'"'"'s lungs during the systolic portion of the cycle of said compressor means thus providing for a pressure increase in the patient'"'"'s lungs due to compression of the patient'"'"'s chest, and (ii) periodically venting the patient'"'"'s lungs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for conducting cardiopulmonary resuscitation comprising the steps of:
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cyclically compressing a patient'"'"'s chest; simultaneously ventilating the patient'"'"'s lungs to a benign limiting pressure over a period of time encompassing at least one compression cycle; preventing retrograde and exhale flow during the systolic portion of the compression cycle thus providing for a pressure increase in the patient'"'"'s lungs due to compression of the patient'"'"'s chest; and periodically venting the patient'"'"'s lungs. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification