Systems and methods for automatic adjustment of ventilator settings
Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a ventilation system is disclosed that includes a computer readable medium including instructions for operating in a hybrid mode. These instructions include measuring patient effort during a spontaneous breath type and deriving a neural inspiratory time from the measurements of patient effort. This neural inspiratory time is then set as the inspiratory for a breath of a mandatory breath type. If new patient effort measurements are received by the ventilator, the neural inspiratory time may be adjusted.
1. A ventilation system, comprising:
a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions for delivering a mandatory breath type, the processor configured to:
calculate patient effort for a first breath of a patient;
based on the calculated patient effort, derive a beginning and an end of the patient's inspiratory cycle for the first breath;
calculate a neural inspiratory time based on at least the derived beginning and end of the patient's inspiratory cycle for the first breath; and
set the neural inspiratory time as an inspiratory time setting for a second breath, the second breath being of the mandatory breath type.
2. The system of claim 1 , wherein the mandatory breath type comprises one of:
volume control, pressure regulated volume control, pressure control, and any time-cycled breath type.
3. The system of claim 1 , wherein the neural inspiratory time is calculated on a breath by breath basis.
4. The system of claim 1 , wherein the neural inspiratory time is calculated on an interval basis.
5. The system of claim 1 , wherein the second breath is the next breath after the first breath.
6. The system of claim 1 , the processor further configured to:
calculate patient effort for the second breath;
based on the calculated patient effort, derive a beginning and an end of the patient's inspiratory cycle for the second breath;
calculate a new neural inspiratory time based on the derived beginning and end of the patient's inspiratory cycle from at least the first breath and the second breath; and
set the new neural inspiratory time as the inspiratory time setting for a third breath, the third breath being of the mandatory breath type.
7. A method for respiratory support, the method comprising:
calculating patient effort for a first breath of a patient;
based on the calculated patient effort, derive a beginning and an end of the patient's inspiratory cycle;
calculating a neural inspiratory time based on at least the derived beginning and end of the patient's inspiratory cycle for the first breath; and
setting the neural inspiratory time as an inspiratory time setting for a second breath, the second breath being of the mandatory breath type.
8. The method of claim 7 , wherein the mandatory breath type comprises one of:
volume control, pressure regulated volume control, and pressure control and any time-cycled breath.
9. The method of claim 7 , wherein the neural inspiratory time is calculated on a breath by breath basis.
10. The method of claim 7 , wherein the neural inspiratory time is calculated on an interval basis.
11. The method of claim 7 , wherein the second breath is the next breath after the first breath.
12. The method of claim 7 , further comprising:
calculating a patient effort for the second breath;
based on the calculated patient effort, derive a beginning and an end of the patient's inspiratory cycle for the second breath;
calculating a new neural inspiratory time based on the derived beginning and end of the patient's inspiratory cycle from at least the first breath and the second breath; and
setting the new neural inspiratory time as the inspiratory time setting for a third breath, the third breath being of the mandatory breath type.
13. A ventilation system, the ventilation system comprising:
a gas inlet;
a gas outlet;
a tube coupling the gas inlet to the gas outlet;
a pressure sensor, wherein the pressure sensor is operable to provide a measured pressure value indicating a pressure in the tube;
a first flow sensor, wherein the first flow sensor is operable to provide an inlet flow value indicating a flow associated with the gas inlet;
a second flow sensor, wherein the second flow sensor is operable to provide an outlet flow value indicating a flow associated with the gas outlet;
a graphical display; and
a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions for delivering a mandatory breath type, the processor configured to:
calculate patient effort for a first breath of a patient;
derive a beginning and an end of the patient's inspiratory cycle for the first breath from the calculated patient effort;
calculate a neural inspiratory time based on at least the derived beginning and end of the patient's inspiratory cycle for the first breath; and
set the neural inspiratory time as an inspiratory time setting for a second breath, the second breath being of the mandatory breath type.
14. The system of claim 13 , wherein the mandatory breath type comprises one of:
volume control, pressure regulated volume control, and pressure control.
15. The system of claim 13 , wherein the neural inspiratory time is calculated on a breath by breath basis.
16. The system of claim 13 , wherein the neural inspiratory time is calculated on an interval basis.
17. The system of claim 13 , wherein the second breath is the next breath after the first breath.
18. The system of claim 13 , the processor further configured to:
calculate patient effort for the second breath;
derive a beginning and an end of the patient's inspiratory cycle for the second breath from the calculated patient effort;
calculate a new neural inspiratory time based on the derived beginnings and ends of the patient's inspiratory cycles for at least the first breath and the second breath;
set the new neural inspiratory time as the inspiratory time setting for a third breath, the third breath being of the mandatory breath type.
19. The system of claim 16 , wherein calculating the neural inspiratory time on an interval basis further comprises:
accessing the derived beginnings and ends of the patient's inspiratory cycles for a preset number of breaths including the first breath;
averaging the derived beginnings and ends of the patient's inspiratory cycles for the preset number of breaths to obtain an average derived beginning and end of the patient's inspiratory cycle; and
setting the average derived beginning and end of the patient's inspiratory cycle as the neural inspiratory time.
20. The system of claim 16 , wherein calculating the neural inspiratory time on an interval basis further comprises:
accessing the derived beginnings and ends of the patient's inspiratory cycles for a series of breaths taken during a preset time period, the series of breaths including the first breath;
averaging the derived beginnings and ends of the patient's inspiratory cycles for the series of breaths to obtain an average derived beginning and end of the patient's inspiratory cycle; and
setting the average derived beginning and end of the patient's inspiratory cycle as the neural inspiratory time.