Abstract: Examples described herein include multiple control systems for medical devices, such as medical ventilators. Examples of multiple control of a medical ventilator in an isolation room are described.

Abstract: Examples described herein include multiple control systems for medical devices, such as medical ventilators. Examples of multiple control of a medical ventilator in an isolation room are described.

Abstract: A flow sensor comprising a tubular body having a bore, a ventilator end, a patient end, and a central region; a restrictor assembly located adjacent the central region, and fluidly connected to the bore, the restrictor assembly having a first pressure port having a first diameter, proximate the patient end, and fluidly connected to a second portion of a first lumen; a second pressure port having a second diameter, proximate the ventilator end, and fluidly connected to a second portion of a second lumen; and a restrictor post having a length connected to a shaft having a width; wherein a first portion of the first lumen is perpendicular to a second portion of the first lumen, and a first portion of the second lumen is perpendicular to a second portion of the second lumen.

Abstract: A pump piston assembly has a pump cylinder, at least one hollow piston slidably mounted for reciprocating motion in the pump cylinder, the piston having an inner surface of a first diameter and an outer surface of a second diameter, and a liner sleeve of a different material from the piston mounted on the inner or outer surface of the piston with a close or friction fit to the diameter of the piston surface on which it is mounted. The liner sleeve is of an acoustic dampening material which has a lower acoustic frequency than the piston material and is configured to absorb harmonic acoustic vibrations resulting from reciprocation of the piston in the cylinder.

Abstract: An enrichment device for mixing ambient air with a gas such as oxygen has a rigid outer housing defining a reservoir. The housing has an outlet port for attachment to a cyclic low pressure source, an ambient air inlet, and a second inlet for connection to a supply of pressurized gas. The reservoir has a plurality of internal walls defining a passageway having a plurality of turns defining a tortuous path for gas flow between the ambient air inlet and the outlet port, and the second inlet communicates with the passageway at a location at or close to the outlet port.

Abstract: A reciprocating drive apparatus has a driving device and a driven device, one of the devices comprising a reciprocating member mounted for movement along a longitudinal axis. At least one rotary member is coupled to one of the devices and a linear bearing assembly has a linear guide rail and a linear slide member with an end coupled to the other device. A connecting link has a first end pivotally connected to the rotary member and a second end pivotally linked to the slide member. Where the reciprocating member is the driven device, rotation of the rotary member will cause the reciprocating member to move back and forth along the longitudinal axis.