Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1992-09-25
1995-02-14
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820314, 128716, A61M 1600
Patent
active
053885759
ABSTRACT:
An automatic controller utilizes a pulse oximeter signal to regulate the oxygen mixture output, peak expiratory end pressure, and inspiratory ventilation time from a positive pressure respiratory assist ventilator. The pulse oximeter senses a patient's hemoglobin saturation and pulse rate by an optical sensor to develop a signal which is used by calculator to determine the patient's corresponding partial pressure of arterial blood. The calculated partial pressure of arterial blood is then used by the calculator in determining the level of inspired oxygen, peak expiratory end pressure, and inspiratory ventilation time provided to the patient. The calculator generates a signal to control the level of inspired oxygen, expiratory end pressure, and inspiratory ventilation time output from a positive pressure respiratory assist ventilator. The level of inspired oxygen, peak expiratory end pressure, and inspiratory ventilation time provided from the ventilator to the patient is varied to maintain a desired predetermined partial pressure of arterial oxygen.
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Diane Blodgett, Manual of Respiratory Care Procedures (Philadelphia:Lippencott, 1987) pp. 204-205.
Burr Edgar S.
Raciti Eric P.
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