Closed loop control system for a high frequency oscillation ventilator
First Claim
1. A control system for a high frequency oscillating ventilator (HFOV) having a reciprocating piston and being connectable to a patient for providing airway pressure thereto, the control system comprising:
- an oscillator controller comprising a pair of closed loop control circuits including an oscillator pressure loop and a centering loop collectively adapted to regulate frequency and amplitude of piston reciprocations and centering of the piston about the midpoint of the full-stroke displacement of the piston; and
a mean airway pressure (MAP) controller comprising a closed loop control circuit adapted for regulating MAP at the patient.
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Accused Products
Abstract
A control system for a high frequency oscillating ventilator (HFOV) includes and oscillator controller and a mean airway pressure (MAP) controller. The HFOV includes a reciprocating piston which is adapted to generate positive and negative pressure waves for delivery to a patient airway. The oscillator controller comprises a pair of closed loop control circuits including an oscillator pressure loop and a centering loop which are collectively adapted to regulate frequency and amplitude of piston reciprocations and centering of the piston. The MAP controller comprises a closed loop control circuit that is adapted for regulating MAP at the patient utilizing feedback in the form of patient circuit pressure. Likewise, the oscillator controller utilizes patient circuit pressure as well as piston displacement feedback in order to regulate movement of the piston.
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Citations
13 Claims
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1. A control system for a high frequency oscillating ventilator (HFOV) having a reciprocating piston and being connectable to a patient for providing airway pressure thereto, the control system comprising:
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an oscillator controller comprising a pair of closed loop control circuits including an oscillator pressure loop and a centering loop collectively adapted to regulate frequency and amplitude of piston reciprocations and centering of the piston about the midpoint of the full-stroke displacement of the piston; and a mean airway pressure (MAP) controller comprising a closed loop control circuit adapted for regulating MAP at the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification