Cardiopulmonary resuscitation and assisted circulation system
First Claim
1. A system for generating cyclic fluctuations in intrathoracic pressure for use in cardiopulmonary resuscitation of a patient comprising:
- a first inflatable bladder means;
means for cyclically inflating and deflating said inflatable bladder means;
means for mounting said inflatable bladder means adjacent the chest wall of a patient so that cyclic inflation of deflation of the bladder means will produce pressure on the chest wall thus generating changes in intrathoracic pressure;
means for (a) urging said inflatable bladder means against the chest wall of the patient to generate an initial pressure on the chest wall, (b) cyclically inflating said bladder means to generate large changes in intrathoracic pressure and, (c) periodically interrupting said urging to release said initial pressure and allow the chest to expand for adequate ventilation of the patient.
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Accused Products
Abstract
A vest system for generating cyclic fluctuations in intrathoracic pressure for use in cardiopulmonary resuscitation and non-invasive circulatory assistance. The vest is preferably provided with a two bladder inflation system. A high pressure bladder contacts the chest wall while a bias bladder is disposed between the high pressure bladder and the vest material. The bias bladder is pressurized to press the high-pressure bladder tightly against the chest wall so that cyclic inflation of the high-pressure bladder can generate large changes in intrathoracic pressure. The bias bladder is released periodically to allow the chest to expand for adequate ventilation. Air flow into and out of each bladder is controlled by sequencing large bore 3-way and 2-way solenoid valves and the rate of air flow into the high-pressure bladder is controlled by a variable resistor.
454 Citations
30 Claims
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1. A system for generating cyclic fluctuations in intrathoracic pressure for use in cardiopulmonary resuscitation of a patient comprising:
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a first inflatable bladder means; means for cyclically inflating and deflating said inflatable bladder means; means for mounting said inflatable bladder means adjacent the chest wall of a patient so that cyclic inflation of deflation of the bladder means will produce pressure on the chest wall thus generating changes in intrathoracic pressure; means for (a) urging said inflatable bladder means against the chest wall of the patient to generate an initial pressure on the chest wall, (b) cyclically inflating said bladder means to generate large changes in intrathoracic pressure and, (c) periodically interrupting said urging to release said initial pressure and allow the chest to expand for adequate ventilation of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for generating cyclic fluctuations in intrathoracic pressure for use in cardiopulmonary resuscitation of a patient comprising:
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a first inflatable bladder means covering the front of the chest and extending laterally to cover the sides; means for cyclically inflating and deflating said inflatable bladder means; means for mounting said inflatable bladder means adjacent the chest wall of a patient so that cyclic inflation of deflation of the bladder means will produce pressure on the chest wall thus generating changes in intrathoracic pressure; means for urging said inflatable bladder means against the chest wall of the patient so that cyclic inflation of the bladder means generates large changes in intrathoracic pressure and for periodically interrupting said urging so that the chest can expand for adequate ventilation of the patient.
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Specification