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Ventilatory assistance using an external effort sensor

  • US 6,758,216 B1
  • Filed: 09/15/1999
  • Issued: 07/06/2004
  • Est. Priority Date: 09/15/1999
  • Status: Expired due to Term
First Claim
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1. A method for controlling a mechanical ventilator comprising the steps of:

  • providing a subject with breathable gas at controllable pressure;

    providing a patient mountable source of light targeting a suprasternal notch of the subject;

    deriving a measure of respiratory effort from the movement of the skin of the suprasternal notch only from a reflection of light from said notch; and

    adjusting said controllable pressure in relation to a reference pressure in accordance with said measure of respiratory effort.

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