SPONTANEOUS BREATHING TRIAL MANAGER
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Abstract
This disclosure describes systems and methods for conducting and terminating spontaneous breathing trials on patients receiving mechanical ventilation. The disclosure describes a novel spontaneous breathing trial manager for a medical ventilator with rapid initiation and continuous monitoring of a patient'"'"'s tolerance of the spontaneous breathing trial and displaying of that tolerance as a function of time, which provides for bedside adjustment of the spontaneous breathing trial parameters and automatic termination of a spontaneous breathing trial based on a time interval expiration or poor patient tolerance of the SBT.
34 Citations
40 Claims
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1-20. -20. (canceled)
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21. A method for managing a spontaneous breathing trial in a medical ventilator, comprising:
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receiving a spontaneous breathing trial threshold for a rapid shallow breathing index (RSBI); receiving a spontaneous breathing trial threshold for a tidal volume; receiving a spontaneous breathing trial threshold for an exhalation volume; initiating a spontaneous breathing trial for a patient being ventilated on a medical ventilator; receiving data from a plurality of sensors, the data including a plurality of sensor measurements taken during the spontaneous breathing trial, wherein the plurality of sensor measurements include a measured flow rate, a measured tidal volume, and a measured exhalation volume; determining a breath frequency based on the measured sensor measurements; determining a RSBI based on the sensor measurements and the determined breath frequency; displaying a graph of the determined RSBI, the measured tidal volume, and the measured exhalation volume versus time during the spontaneous breathing trial; displaying the received breathing trial threshold for the tidal volume, the received spontaneous breathing trial threshold for the exhalation volume, and the received spontaneous breathing trial threshold for the RSBI on the graph; and displaying a breach of the received breathing trial threshold for the tidal volume by the measured tidal volume, a breach of the received spontaneous breathing trial threshold for the exhalation volume by the measured exhalation volume, and a breach of the received spontaneous breathing trial threshold for the RSBI by the determined RSBI with a change in color on the graph. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A medical ventilator system, comprising:
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a processor; a gas regulator controlled by the processor, the gas regulator adapted to regulate a flow of gas from a gas supply to a patient via a patient circuit; a tidal volume sensor monitored by the processor, the tidal volume sensor is adapted to measure tidal volume of the patient; a flow sensor monitored by the processor, the flow sensor is adapted to measure the flow of the gas to and from the patient; an exhalation volume sensor monitored by the processor, the exhalation volume sensor is adapted to measure an exhalation volume of the patient; a spontaneous breathing trial manager in communication with the processor the spontaneous breathing trial manager including; a threshold monitor module, the threshold monitor module monitors at least one of the measured tidal volume, the measured exhalation volume, and a determined RSBI during a spontaneous breathing trail and compares the measured tidal volume, the measured exhalation volume, and the determined RSBI to a breathing trial threshold for the tidal volume, a spontaneous breathing trial threshold for the exhalation volume, and a spontaneous breathing trial threshold for the RSBI, and a ventilation module, the ventilation module initiates and ends the spontaneous breathing trail by sending commands to the processor; and a display module, the display module displays a software-generated graphic of a graph, wherein the graph includes; a determined RSBI, a measured tidal volume, and a measured exhalation volume versus time for the spontaneous breathing trial, and the spontaneous breathing trial threshold for the tidal volume, the spontaneous breathing trial threshold for the exhalation volume, and the spontaneous breathing trial threshold for the RSBI. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. A computer-readable medium having computer-executable instructions for performing a method for managing a spontaneous breathing trial in a medical ventilator, comprising:
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receiving a spontaneous breathing trial threshold for a rapid shallow breathing index (RSBI); receiving a spontaneous breathing trial threshold for a tidal volume; receiving a spontaneous breathing trial threshold for an exhalation volume; repeatedly initiating a spontaneous breathing trial for a patient being ventilated on a medical ventilator; repeatedly receiving data from a plurality of sensors, the data including a plurality of sensor measurements taken during the spontaneous breathing trial, wherein the plurality of sensor measurements include a measured flow rate, a measured tidal volume, and a measured exhalation volume; repeatedly determining a breath frequency based on the measured sensor measurements; repeatedly determining a RSBI based on the sensor measurements and the determined breath frequency; repeatedly displaying a graph of the determined RSBI, the measured tidal volume, and the measured exhalation volume versus time during the spontaneous breathing trial; repeatedly displaying the received breathing trial threshold for the tidal volume, the received spontaneous breathing trial threshold for the exhalation volume, and the received spontaneous breathing trial threshold for the RSBI on the graph; and repeatedly displaying a breach of the received breathing trial threshold for the tidal volume by the measured tidal volume, a breach of the received spontaneous breathing trial threshold for the exhalation volume by the measured exhalation volume, and a breach of the received spontaneous breathing trial threshold for the RSBI by the determined RSBI with a change in color on the graph.
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Specification