Volume ventilator
First Claim
1. A ventilator system having patient connection means and a plurality of integrated modes of operation for providing a patient with a flow of breathing gas under pressure comprisingvalve means for controlling said flow of gas to said patient connection means for inspiration and expiration,mode selecting means for operating said ventilator system in at least one selected mode of operation;
- adjustable setting means including a plurality of adjustable time setting means individually related to sigh inspiratory time, sigh expiratory time, inspiratory time, expiratory time and inspiratory pause time each corresponding to said integrated modes of operation with each of said time setting means producing a corresponding time related threshold signal,signal means including time base means for producing a common time signal which increases in value with time at a predetermined linear slope for a predetermined time duration,means for comparing and determining the crossing of each threshold signal with said common time signal for producing a plurality of control signals,means responsive to said mode selecting means for selecting at least one control signal corresponding to a selected integrated mode and for resetting the time base means to begin a new time signal thereby to provide said predetermined time duration, andmeans for applying said at least one selected control signal to said valve means for controlling the flow of gas to said patient connection means whereby each of said time setting means may be continuously adjusted to change one or more of said threshold signals without varying any of the other threshold signals.
0 Assignments
0 Petitions
Accused Products
Abstract
A volume ventilator having a plurality of integrated modes of operation for providing a patient with a flow of breathing gas under pressure. A plurality of adjustable setting devices each producing an individual threshold signal related to a parameter of the gas flow. Mode switching means provides for the selection of at least one mode signal. Each threshold signal is compared with a common variable signal for producing a plurality of control signals. At least one of the control signals is selected in accordance with the selected mode signal and that control signal is applied to a valve system for controlling flow of gas to the patient. In this manner, the setting devices may be continuously adjusted to change one or more of the threshold signals without varying any of the other threshold signals. There is further provided a comprehensive system of alarms.
275 Citations
44 Claims
-
1. A ventilator system having patient connection means and a plurality of integrated modes of operation for providing a patient with a flow of breathing gas under pressure comprising
valve means for controlling said flow of gas to said patient connection means for inspiration and expiration, mode selecting means for operating said ventilator system in at least one selected mode of operation; -
adjustable setting means including a plurality of adjustable time setting means individually related to sigh inspiratory time, sigh expiratory time, inspiratory time, expiratory time and inspiratory pause time each corresponding to said integrated modes of operation with each of said time setting means producing a corresponding time related threshold signal, signal means including time base means for producing a common time signal which increases in value with time at a predetermined linear slope for a predetermined time duration, means for comparing and determining the crossing of each threshold signal with said common time signal for producing a plurality of control signals, means responsive to said mode selecting means for selecting at least one control signal corresponding to a selected integrated mode and for resetting the time base means to begin a new time signal thereby to provide said predetermined time duration, and means for applying said at least one selected control signal to said valve means for controlling the flow of gas to said patient connection means whereby each of said time setting means may be continuously adjusted to change one or more of said threshold signals without varying any of the other threshold signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. An integrated ventilator system having patient connection means and a plurality of integrated modes of operation for providing a patient with a flow of breathing gas under pressure comprising
mode switching means including mode selection logic means for selecting said integrated modes corresponding to sigh, assist, inspirators, pause and PEEP, valve means for controlling said flow of gas to said patient connection means for inspiration and expiration, a plurality of adjustable setting means each producing an individual predetermined threshold signal related to individual gas flow parameters of said integrated modes corresponding to sigh, assist inspiratory pause and PEEP signal sensing means coupled to said adjustable setting means for comparing said threshold signals to a reference signal for producing a plurality of control signals, and means responsive to said mode switching means for applying at least one of said control signals corresponding to a selected integrated mode to said valve means for controlling the flow of gas to said patient connection means in accordance with the selected mode whereby each of said setting means is independently adjusted and such mode selection does not require any further change in the setting of said adjustable setting means.
-
38. A ventilator system having patient connection means and a plurality of integrated modes of operation for providing a patient having a respiratory system with a flow of breathing gas under pressure comprising
valve means for controlling said flow of gas for inspiration and expiration, mode switching means including mode selection logic means for selecting said integrated modes corresponding to sigh, assist, inspiratory pause and IMV, adjustable setting means including a plurality of adjustable time setting means individually related to sigh, inspiratory time, expiratory time, and inspiratory pause with each of said time setting means producing a corresponding time related threshold signal, signal means including time base means for producing a common time signal which increases in value monotonically with time in a predetermined manner related to the respiratory system of the patient, means for comparing and determining the crossing of each threshold signal with said common time signal for producing a plurality of control signals, means responsive to said mode switching means and said comparing means for selecting at least one of said control signals corresponding to said selected integrated mode of operation, means for applying said selected control signals to said valve means for controlling the flow of gas to said patient connection, means whereby said time setting means may be continuously adjusted to change one or more of said threshold signals without varying any of the other threshold signals, and said adjustable setting means includes an adjustable IMV rate setting means for producing an IMV rate threshold, signal, means for generating an IMV reference signal, means for comparing said IMV rate threshold signal to said IMV reference signal for producing an IMV rate control signal, and means responsive to said mode switching means for applying said IMV rate control signal to said valve means when said IMV mode is selected.
-
42. An integrated ventilator system having patient connection means and a plurality of integrated modes of operation for providing a patient with a flow of breathing gas under pressure comprising
mode switching means including mode selection logic means for selecting individual mode signals corresponding to sigh, assist, inspiratory pause, IMV, and PEEP, valve means for controlling said flow of gas to said patient connection means for inspiration and expiration, a plurality of adjustable setting means each producing an individual predetermined threshold signal related individual flow parameters corresponding to sigh, assist, inspiratory pause, IMV and PEEP, signal sensing means coupled to said adjustable setting means for comparing said threshold signals to a reference signal for producing a plurality of control signals, means responsive to said mode switching means for applying at least one of said control signals corresponding to said selected mode of operation to said valve means for controlling the flow of gas, and said adjustable setting means including an adjustable IMV rate setting means for producing an means for comparing an IMV reference rate threshold signal, IMV signal to said IMV rate threshold signal for producing an IMV rate control signal, and means responsive to said mode switching means for applying said IMV rate control signal to said valve means when said IMV mode is selected.
Specification