Patent ID: 6604523
Filing Date: 2003-08-12
Classification: A61H,A61M,C09K

Abstract:
A method for increasing cardiopulmonary circulation induced by chest compression and decompression when performing cardiopulmonary resuscitation, by augmenting negative intrathoracic pressures, said method comprising the steps of:interfacing a pressure responsive inflow valve to a patient's airway; performing chest compression and chest decompression, wherein during chest decompression the inflow valve prevents respiratory gases from entering the lungs until a negative intrathoracic pressure level in the range from about âˆ’3 cm H20 to âˆ’30 cm H20 is exceeded at which time the inflow valve opens, said inflow valve assisting in increasing the magnitude and duration of negative intrathoracic pressure during decompression and thereby enhancing the amount of blood flow into the heart and lungs; and supplying the patient with a pressurized respiratory gas through the inflow valve when the inflow valve opens to ventilate the patient.