초록 ▼

A device for administering oxygen and other respirating gases to a patient premeters and temporarily stores single dose quantities of respirating gas and dispenses each dose in synchronization with the patients\s inspiratory cycle. A sensor produces a signal upon the onset of each inhalation and a s

A device for administering oxygen and other respirating gases to a patient premeters and temporarily stores single dose quantities of respirating gas and dispenses each dose in synchronization with the patients\s inspiratory cycle. A sensor produces a signal upon the onset of each inhalation and a single dose of gas is dispensed to the patient in immediate response to the sensor signal.

대표청구항 ▼

A device for supplying premeasured doses of respirating gas to a patient in synchronization with the respiratory cycle of said patient, comprising: a source of respirating gas at relatively high pressure; means comprising a cylinder closed at both ends and having disposed within the cylinder a pisto

A device for supplying premeasured doses of respirating gas to a patient in synchronization with the respiratory cycle of said patient, comprising: a source of respirating gas at relatively high pressure; means comprising a cylinder closed at both ends and having disposed within the cylinder a piston member shorter than said cylinder and free to reciprocate back and forth from one end of said cylinder to the other for premetering a single dose quantity of said respirating gas and for temporarily storing said metered dose; means for sensing the onset of inhalations of said patient and for producing signals in response to said sensing; gas flow routing means operating independently of the position of said piston member and acting only in response to a sensed inhalation signal for routing the flow of respirating gas back and forth from a first path to a second path in response to said produced signals, said routing means arranged to cause said respirating gas to flow along said first path in response to a produced signal, at a pressure greater than atmospheric, to one interior end of said cylinder and to drive said piston to the other end of said cylinder, said routing means further arranged to cause said respirating gas to flow along said second path in response to a successive produced signal, at a pressure greater than atmospheric, to the other interior end of said cylinder and to drive said piston back to the opposite cylinder end, the movement of said piston from one end of said cylinder to the other serving to drive a metered dose of respirating gas out of said cylinder, and cannula means for conveying said metered dose of respirating gas to the patient, said cannula means arranged to communicate through said flow routing means between the interior end of said cylinder opposite to that of the entering respirating gas and said patient.