A method and apparatus for monitoring changes in the intra-thoracic pressure of a patient due to the patient's respiratory activity or volumetric changes in the extra-thoracic arterial circulatory system due to cardiac function based on the changes in pressure in the patient's extra-thoracic arterial...http://www.google.fr/patents/US7740591?utm_source=gb-gplus-shareBrevet US7740591 - Apparatus and method for monitoring pressure related changes in the extra-thoracic arterial circulatory system
Apparatus and method for monitoring pressure related changes in the extra ...