FLUID-DRIVEN MECHANICAL VENTILATOR WITH ACCUMULATOR

Abstract

A mechanical ventilator includes an oscillating flow controller, a respiratory interface, and an accumulator having a first variable volume chamber fluidly coupled to a bi-directional fluid port of the flow control valve, a second variable volume chamber fluidly coupled to the respiratory interface, a displaceable diaphragm fluidly separating the first variable volume chamber from the second variable volume chamber, and a biasing element configured to bias the diaphragm in the direction of the first variable volume chamber. In use, the oscillating flow controller provides an oscillating fluid output to the accumulator, thereby causing the accumulator to oscillate between first and second states, wherein the accumulator draws breathing air into the second variable volume chamber when transitioning from the second state to the first state, and wherein the accumulator forces breathing air from the second variable volume chamber to the respiratory interface when transitioning from the first state to the second state.

CPC Classifications