초록 ▼

Ventilator for use with a source of gas under pressure for supplying such gas to the airway of a patient having an inlet adapted to be connected to the source of gas, and an outlet adapted to be connected to the airway of the patient. A pneumatic oscillator is connected to the inlet for supplying pu

Ventilator for use with a source of gas under pressure for supplying such gas to the airway of a patient having an inlet adapted to be connected to the source of gas, and an outlet adapted to be connected to the airway of the patient. A pneumatic oscillator is connected to the inlet for supplying pulsatile gas in the form successive small volumes of gas to the airway of the patient during a breath of the patient to cause diffusive ventilation of the airway of the patient. An exhalation valve assembly is connected to the patient airway for permitting the patient to exhale gases introduced into the patient airway.

대표청구항 ▼

In a combination venturi and exhalation valve assembly, a main body having a passageway therein extending axially thereof and providing a proximal airway port, a venturi body, means slidably mounting said venturi body in said pasageway in said main body for movement between first and second position

In a combination venturi and exhalation valve assembly, a main body having a passageway therein extending axially thereof and providing a proximal airway port, a venturi body, means slidably mounting said venturi body in said pasageway in said main body for movement between first and second positions, means carried by the main body yieldably urging the venturi body toward said second position, said main body being formed with an expiratory port communicating with said passageway and being spaced from said proximal airway port, means forming a seal between the venturi body and the passageway of the main body between said airway port and said expiratory port when the venturi body is in the second position, said venturi body having a venturi-like passageway extending axially through the venturi body, means forming a nozzle carried by the venturi body and having a opening therein in axial alignment with the venturi-like passageway, said venturi body forming a nozzle communicating with said venturi-like passageway, said main body also being formed with an entrainment port in communication with said passageway in said main body and being located adjacent said entrainment opening, diaphragm carried by said main body and extending across the passageway in said main body, an end cap carried by the main body and having an inlet opening therein in communication with one side of the diaphragm, means forming a connection between the diaphragm and the means forming the nozzle, means for establishing communication between the inlet carried by the end cap and the means forming the nozzle and extending through the diaphragm whereby when gas is supplied to the inlet opening of the cap, gas is supplied to the means forming the nozzle to urge the diaphragm to move the venturi body from the first position to the second position thereby preventing flow between the airway port and the expiratory port, said means forming said nozzle being formed to permit the passage of air from the entrainment port through the entrainment port into the venturi-like passageway.