Respirator construction
First Claim
1. A respirator, particularly for infants, for supplying respiratory gas to a patient selectively according to IPPV, PEEP, CPAP and IMV cycles, comprising:
- (a) a respiration gas supply line connectable to a patient for supplying a respiratory gas;
(b) an expiration valve for switching from an inspiration phase to an expiration phase and back connected to said respiration gas supply line;
(c) a first logic element connected to said expiration valve for switching said expiration valve from an inspiration phase to an expiration phase and back;
(d) pressure control means connected to said first logic element for supplying gas at selected pressures to said first logic element for controlling said inspiration and expiration phases of said expiration valve for IPPV, CPAP and PEEP cycling;
(e) time control means connected to said first logic element and said pressure control means for providing a selected time duration for said inspiration phase and a selected time duration for said expiration phase; and
(f) a static control pressure line associated with said pressure and time control means;
said time control means comprising a first regulating element connected to said static control pressure line, second logic element means connected to said first regulating element, said first regulating element and said second logic element means provided for controlling said selected time duration for said inspiration phase, a first volume in said second logic element means fillable by gas pressure from said static control pressure line to define said selected time duration for said inspiration phase, a second regulating element connected to said static control pressure line, third logic element means connected to said second regulating element, said second regulating element and third logic element means controlling said selected time duration for said expiration phase, a second volume in said third logic element means fillable by gas pressure from said static control pressure line for defining said selected time duration of said expiration phase, a third volume connected to said second volume means, and a reversing switch connected between said second and third volumes, said third volume being fillable by gas from said second volume via said reversing switch to selectively add an additional time duration to said expiration phase whereby the respirator functions according to IMV cycles.
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Abstract
A respirator, particularly for infants, for supplying respiratory gas to a patient selectively according to an intermittent positive pressure ventilation cycle, an positive end expiratory pressure cycle, a continuous positive airway pressure cycle, and an intermittent mandatory ventilation cycle comprising, a respiration gas supply line connectable to a patient for supplying a respiratory gas to the patient, an expiration valve for switching from an inspiration phase to an expiration phase and back also connectable to the patient, and a first logic element connected to the expiration valve for switching the expiration valve from an inspiration phase to an expiration phase and back again. A pressure control system is connected to the first logic element for supplying gas at selected pressures to the expiration valve for the inspiration and expiration cycles thereof. A time control system is connected to the first logic element and the pressure control system which provides a selected time duration for an inspiration phase and an expiration phase. A source of static control pressure is derived from the respiration gas supply line and the pressure and time control systems both comprise a plurality of logic elements, each connectable to the static control pressure for controlling the inspiration and expiration phase switching, the selected pressures and the selected time durations.
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Citations
8 Claims
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1. A respirator, particularly for infants, for supplying respiratory gas to a patient selectively according to IPPV, PEEP, CPAP and IMV cycles, comprising:
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(a) a respiration gas supply line connectable to a patient for supplying a respiratory gas; (b) an expiration valve for switching from an inspiration phase to an expiration phase and back connected to said respiration gas supply line; (c) a first logic element connected to said expiration valve for switching said expiration valve from an inspiration phase to an expiration phase and back; (d) pressure control means connected to said first logic element for supplying gas at selected pressures to said first logic element for controlling said inspiration and expiration phases of said expiration valve for IPPV, CPAP and PEEP cycling; (e) time control means connected to said first logic element and said pressure control means for providing a selected time duration for said inspiration phase and a selected time duration for said expiration phase; and (f) a static control pressure line associated with said pressure and time control means;
said time control means comprising a first regulating element connected to said static control pressure line, second logic element means connected to said first regulating element, said first regulating element and said second logic element means provided for controlling said selected time duration for said inspiration phase, a first volume in said second logic element means fillable by gas pressure from said static control pressure line to define said selected time duration for said inspiration phase, a second regulating element connected to said static control pressure line, third logic element means connected to said second regulating element, said second regulating element and third logic element means controlling said selected time duration for said expiration phase, a second volume in said third logic element means fillable by gas pressure from said static control pressure line for defining said selected time duration of said expiration phase, a third volume connected to said second volume means, and a reversing switch connected between said second and third volumes, said third volume being fillable by gas from said second volume via said reversing switch to selectively add an additional time duration to said expiration phase whereby the respirator functions according to IMV cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A respirator, particularly for infants, for supplying respiratory gas to a patient selectively according to the IPPV, PEEP, CPAP AND IMV cycles, comprising:
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(a) a respiration gas supply line connectable to a patient for supplying a respiratory gas; (b) expiration valve means for switching from an inspiration phase to an expiration phase and back connected to said respiration gas supply line; (c) a first logic element for switching said expiration valve means from an inspiration phase to an expiration phase and back, said first logic element having first and second control inputs, first and second supply inputs, and one output connected to said expiration valve means for switching said expiration valve means; (d) pressure control means connected to said first control input and said first and second supply inputs of said first logic element for supplying gas at selected pressures to said first and second supply inputs and said first control input, for controlling said inspiration and expiration phases of said expiration valve means for IPPB, CPAP and PEEP cycles; (e) time control means connected to said second control input of said logic element and to said pressure control means for providing a selected time duration for said inspiration and expiration phase and for providing an IMV cycle; and (f) a static control pressure line connected to said pressure and said time control means for supplying a static control pressure thereto for supplying gas at said selected pressures and for said selected time durations.
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Specification