Shock treatment systems and methods

Details Shock treatment systems and methods Shock treatment systems and methods

A - Human Necessities

62

B

A62B 9/02 (2006.01) A61M 16/00 (2006.01) A61M 16/20 (2006.01) A62B 7/04 (2006.01) F16K 31/26 (2006.01)

Patent

CA 2447013

According to the invention, methods and devices for increasing cardiopulmonary circulation induced by chest compression and decompression when performing cardiopulmonary resuscitation are provided. According to one method, a pressure responsive inflow valve (24) is coupled to a patient's airway. Chest compressions and chest decompressions are performed. During chest decompression the inflow valve (24) prevents respiratory gases from entering the lungs until a certain negative intrathoracic pressure level is exceeded at which time the inflow valve (24) opens. In this way, the inflow valve (24) assists in increasing the magnitude and duration of negative intrathoracic pressure during decompression to enhance the amount of blood flow into the heart and lungs. Further, the patient is supplied with a pressurized respiratory gas through the inflow valve (24) when the inflow valve (24) opens to ventilate the patient.

L'invention concerne des procédés et des dispositifs qui augmentent la ciculation cardio-pulmonaire induite par la compression et la décompression du thorax lorsqu'une réanimation cardio-pulmonaire est effectuée. Selon un procédé, une soupape d'amenée sensible à la pression (24) est reliée à la voie aérienne d'un patient. Des compressions et des décompressions du thorax sont pratiquées. Pendant la décompression du thorax, la soupape d'amenée (24) empêche les gaz respiratoires de pénétrer dans les poumons tant qu'un certain niveau de pression intrathoracique négative n'est pas dépassé, après quoi la soupape d'amenée (24) s'ouvre. Ainsi, la soupape d'amenée (24) contribue à augmenter l'amplitude et la durée de la pression intrathoracique pendant la décompression, ce qui augmente le débit sanguin vers le coeur et les poumons. En outre, le patient est alimenté en gaz respiratoire sous pression par l'intermédiaire de la soupape d'amenée (24) lorsque cette dernière s'ouvre pour ventiler le patient.

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