Computer gated positive expiratory pressure method
First Claim
1. A method for altering pressure in a patient breathing pathway in a respiratory ventilation apparatus during specified periods of a patient heart cycle, the respiratory ventilation apparatus having a ventilator and means for providing said patient breathing pathway with a positive ventilation pressure during a patient breath cycle, the steps of the method comprising:
- detecting heart beats in a plurality of patient cardiac cycles;
generating an electrical heart beat signal in response to said heart beats, and amplifying said electrical heart beat signal;
determining a variable moment following a detected heartbeat; and
altering said positive ventilation pressure in said patient breathing pathway commencing at said variable moment following a detected heart beat for a variable time interval during selected cardiac cycles.
0 Assignments
0 Petitions
Accused Products
Abstract
The computer gated positive expiratory pressure method alters pressure in a patient breathing pathway in a respiratory ventilator during specified periods of a patient'"'"'s heart cycle. Heartbeats of a patient are detected in patient cardiac cycles, and an electrical heartbeat signal is generated in response to the heartbeats. In a presently preferred embodiment, the electrical heartbeat signal is squared to amplify the signal. A variable moment following a detected heartbeat is determined, and positive ventilation pressure in the patient breathing pathway is altered commencing at the variable moment following a detected heartbeat, for a variable time interval during selected cardiac cycles.
-
Citations
6 Claims
-
1. A method for altering pressure in a patient breathing pathway in a respiratory ventilation apparatus during specified periods of a patient heart cycle, the respiratory ventilation apparatus having a ventilator and means for providing said patient breathing pathway with a positive ventilation pressure during a patient breath cycle, the steps of the method comprising:
-
detecting heart beats in a plurality of patient cardiac cycles; generating an electrical heart beat signal in response to said heart beats, and amplifying said electrical heart beat signal; determining a variable moment following a detected heartbeat; and altering said positive ventilation pressure in said patient breathing pathway commencing at said variable moment following a detected heart beat for a variable time interval during selected cardiac cycles. - View Dependent Claims (2, 3, 4)
-
-
5. A method for altering pressure in a patient breathing pathway in a respiratory ventilation apparatus during specified periods of a patient heart cycle, the respiratory ventilation apparatus having a ventilator and means for providing said patient breathing pathway with a relatively high positive ventilation pressure and a relatively low positive ventilation pressure, the steps of the method comprising:
-
alternatingly providing said patient breathing pathway with a relatively high positive ventilation pressure and a relatively low positive ventilation pressure to produce a pressure or volume supported breath cycle; detecting heart beats in a plurality of patient cardiac cycles; producing a secondary relatively low positive ventilation pressure in said patient breathing pathway commencing at a variable moment following a detected heart beat for a variable time interval during selected cardiac cycles; and determining said variable moment by determining a period of time between selected sequential heart beats of said patient, and multiplying a preselected multiplier value by said period of time between said selected sequential heart beats, said preselected multiplier value approximately corresponding to a computed fraction of said period of time between heart beats. - View Dependent Claims (6)
-
Specification