Pressure-controlled breathing aid
AssigneeCovidien LP
InventorGuy Bourdon
Life of this patent
Estimating the term…
Abstract
The ventilation module (8) regulates the inspiratory pressure (P) according to an inspiratory pressure order (AI). A control module (9) compares the breathed volume at each cycle (VTI) with a minimum volume order (VRImini) and varies the pressure order (AI) in the direction tending to maintain the breathed volume (VTI) just over the minimum (VTImini), but keeping the pressure order (AI) within the interval comprised between the two extreme values (AImini, AImaxi). Utilization to combine the advantages of the pressure mode ventilation with those of the volumetric ventilation.
Claims17
A method for controlling a breathing aid apparatus, while providing breathing aid to a patient at a target gas pressure, the method comprising:
- determining a breathed volume of the patient;
- comparing the determined breathed volume with a predetermined volume threshold;
- resetting the target gas pressure based at least on the determined breathed volume of the patient, by increasing the target gas pressure if the determined breathed volume is lower than the predetermined volume threshold and by decreasing the target gas pressure if the determined breathed volume is higher than the predetermined volume threshold;
- and
- adjusting the pressure of gas delivered to the patient based on the reset target gas pressure.
A method for controlling a breathing aid apparatus while providing breathing aid to a patient, the method comprising:
- determining a breathed volume of gas delivered to the patient;
- determining an actual pressure of gas delivered to the patient;
- and
- adjusting the pressure of gas delivered to the patient based on both the determined breathed volume and the determined actual gas pressure.
A method for controlling a breathing aid apparatus while providing breathing aid to a patient, the method comprising:
- delivering gas to a patient according to a first target gas pressure;
- determining an actual breathed volume for the patient;
- setting a second target gas pressure based on both the determined breathed volume and a preset threshold volume, wherein the second target gas pressure is higher than the first target gas pressure if the actual breathed volume is lower than the preset threshold volume and the second target gas pressure is lower than the second target gas pressure if the actual breathed volume is higher than the preset threshold volume;
- and
- delivering gas to the patient according to the second target gas pressure.
Dependencies are inferred from the claim text.