Respirator
First Claim
1. A synchronized intermittent mandatory ventilation respirator for providing selected timed inhalation and exhalation cycles to a patient while permitting the patient to carry out a complete spontaneous inhalation and exhalation on its own comprising, gas supply means adapted to be connected to a patient for supplying a breathing gas under pressure, a main line connected to said gas supply means for supplying breathing gas to the patient, a main valve in said main line, a supplemental line connected to said main line upstream of said main valve, automatic ventilation timing means connected to said supplemental line and said main valve for opening said main valve for a first selected timed inhalation cycle to supply breathing gas to the patient and closing said main valve for a selected timed exhalation cycle to permit the patient to exhale, gas measuring means connected to said main line for sensing a patient induced pressure change in said main line formed by a spontaneous inhalation and a spontaneous exhalation of the patient, trigger means connected to said supplemental line, to said gas measuring means and to said timing means for switching said timing means from an exhalation cycle to an inhalation cycle in response to a spontaneous inhalation of the patient, and spontaneous breathing timer means connected to said supplemental line, to said gas measuring means and to said automatic ventilation timing means for blocking the connection between said automatic ventilation timing line and said supplemental means and stopping the cycling of said automatic ventilation timing means in response to a spontaneous inhalation and exhalation of the patient and for supplying breathing air to the patient from said supplemental line for a second selected timed inhalation cycle, and permitting the exhalation of the patient.
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Accused Products
Abstract
A synchronized intermittent mandatory ventilation respirator for providing inhalation and exhalation cycles to a patient while permitting the patient to carry out a complete inhalation and exhalation cycle spontaneously, comprising a gas supply adapted to be connected to a patient for supplying breathing gas under pressure to the patient, a main line connected to the gas supplied for supplying breathing gas to the patient, a main valve in the main line, and a timing system connected to the gas supply and the main valve for opening the main valve for a first selected timed inhalation cycle to supply breathing air to the patient and closing the valve for a selected timed exhalation cycle to permit the patient to exhale. A timer is connected to the main line downstream of the main valve, to the gas supply and to the timing system for blocking the connection between the timing system and the gas supply for stopping cycling of the timing system in response to a spontaneous inhalation of the patient and for supplying breathing air to the patient for a second selected timed inhalation cycle, and a trigger is connected to the main line downstream of the main valve and to the timing system for switching the timing system from an exhalation cycle to an inhalation cycle in response to a spontaneous inhalation of the patient.
56 Citations
10 Claims
- 1. A synchronized intermittent mandatory ventilation respirator for providing selected timed inhalation and exhalation cycles to a patient while permitting the patient to carry out a complete spontaneous inhalation and exhalation on its own comprising, gas supply means adapted to be connected to a patient for supplying a breathing gas under pressure, a main line connected to said gas supply means for supplying breathing gas to the patient, a main valve in said main line, a supplemental line connected to said main line upstream of said main valve, automatic ventilation timing means connected to said supplemental line and said main valve for opening said main valve for a first selected timed inhalation cycle to supply breathing gas to the patient and closing said main valve for a selected timed exhalation cycle to permit the patient to exhale, gas measuring means connected to said main line for sensing a patient induced pressure change in said main line formed by a spontaneous inhalation and a spontaneous exhalation of the patient, trigger means connected to said supplemental line, to said gas measuring means and to said timing means for switching said timing means from an exhalation cycle to an inhalation cycle in response to a spontaneous inhalation of the patient, and spontaneous breathing timer means connected to said supplemental line, to said gas measuring means and to said automatic ventilation timing means for blocking the connection between said automatic ventilation timing line and said supplemental means and stopping the cycling of said automatic ventilation timing means in response to a spontaneous inhalation and exhalation of the patient and for supplying breathing air to the patient from said supplemental line for a second selected timed inhalation cycle, and permitting the exhalation of the patient.
Specification