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US 12,741,116 B2Granted
Gas-driven, pressure-regulated ventilator
AssigneeOregon Health & Science University
InventorsEvan Fontaine, Whitney Menzel, Albert Chi
Life of this patent
Estimating the term…
Abstract
A gas-driven, pressure-regulated ventilator (10, 210) provides support for spontaneous breathing and non-breathing patients. The ventilator provides short pressure cycled and constant flow ventilatory support that allows the patient to receive consistent and reliable ventilatory breaths. The ventilator is designed to allow a clinician to adjust Peak Inspiratory Pressure (PIP) and Positive End Expiratory Pressure (PEEP) values and the duration of inhalation and exhalation flows in a breath cycle to accommodate patient-specific ventilation needs.
Claims24
A gas-driven, pressure-regulated ventilator, comprising:
- a hollow valve body including an interior and a breathing gas pathway in fluid communication with a gas inlet for supply of gas flow within the interior of the valve body, the valve body having first and second ends and defining a longitudinal axis, and the valve body including pressure adjustment open space and a gas inlet opening and a gas outlet opening, the pressure adjustment open space located nearer to the first end, and the gas inlet and gas outlet openings located nearer to the second end;
- an adjustable peak inspiratory pressure (PIP) valve mechanism operatively associated with the valve body and including:
- a gas-pressure responsive displacement member having a contact surface that, in response to pressure applied by flow of gas along the breathing gas pathway, changes position within the interior of the valve body between open and closed positions along the longitudinal axis, and the gas-pressure responsive displacement member assuming the closed position in absence of gas flow within the interior of the valve body;
- a spring support member operatively connected to the valve body and to a spring-actuated member that extends into the pressure adjustment open space and applies a force against the contact surface of the gas-pressure responsive displacement member, the force applied in a direction opposite to that of force applied to the gas-pressure responsive displacement member by the flow of gas along the breathing gas pathway;
- and
- a spring adjustment device operatively connected to the spring-actuated member for adjusting the force applied against the contact surface of the gas-pressure responsive displacement member;
- and
- an adjustable gas flow rate valve mechanism operatively associated with the valve body and including a gas flow rate adjustment device configured to allow, in cooperation with the gas outlet opening, a controllable amount of gas flow out of the valve body when the gas-pressure responsive displacement member is in the open position, and in which the valve body is of generally cylindrical shape and comprises a base portion and a detachable pressure adjustment portion, the base portion including, at a first end, a first locking feature, and, at a second end, a base floor, the base floor including the gas inlet opening from which a tubular member extends into the interior of the valve body and terminates in a sealing rim at a free end, and the pressure adjustment portion including a second locking feature configured to mate with the first locking feature to releasably secure together the base portion and the pressure adjustment portion.
5 more elements
A gas-driven, pressure-regulated ventilator, comprising:
- a hollow valve body including an interior and a breathing gas pathway in fluid communication with a gas inlet for supply of gas flow within the interior of the valve body, the valve body having first and second ends and defining a longitudinal axis, and the valve body including pressure adjustment open space and a gas inlet opening and a gas outlet opening, the pressure adjustment open space located nearer to the first end, and the gas inlet and gas outlet openings located nearer to the second end;
- an adjustable peak inspiratory pressure (PIP) valve mechanism operatively associated with the valve body and including:
- a gas-pressure responsive displacement member having a contact surface that, in response to pressure applied by flow of gas along the breathing gas pathway, changes position within the interior of the valve body between open and closed positions along the longitudinal axis, and the gas-pressure responsive displacement member assuming the closed position in absence of gas flow within the interior of the valve body;
- a spring support member operatively connected to the valve body and to a spring-actuated member that extends into the pressure adjustment open space and applies a force against the contact surface of the gas-pressure responsive displacement member, the force applied in a direction opposite to that of force applied to the gas-pressure responsive displacement member by the flow of gas along the breathing gas pathway;
- and
- a spring adjustment device operatively connected to the spring-actuated member for adjusting the force applied against the contact surface of the gas-pressure responsive displacement member;
- and
- an adjustable gas flow rate valve mechanism operatively associated with the valve body and including a gas flow rate adjustment device configured to allow, in cooperation with the gas outlet opening, a controllable amount of gas flow out of the valve body when the gas-pressure responsive displacement member is in the open position, in which the spring-actuated member has a distal end and a spring connection tab, the distal end of the spring-actuated member applying the contact force against the gas-pressure responsive displacement member, and in which the spring support member is tubular and has a threaded outer surface configured for threaded engagement with a spring tension adjustment nut, and the tubular spring support member further comprises two diametrically opposed lengthwise slots, the tubular spring support member containing a spring having first and second ends, the first end of the spring operatively connected to a spring hanger support bar extending through the two slots in the tubular spring support member and resting against the spring tension adjustment nut, and the second end of the spring operatively connected to the spring connection tab of the spring-actuated member.
5 more elements
Dependencies are inferred from the claim text.