Waveform display for medical ventilator
First Claim
1. A system for controlling a waveform display of a parameter of a breathing gas delivered from a medical ventilator to a patient through a conduit, said system comprising an input device to enable a user to send a signal to the ventilator to establish a desired parameter in the gas delivered by the ventilator to the patient, a sensor for sensing in the gas delivered to the patient the desired parameter established by the user with said input device, said sensor providing a signal representative of such sensed parameter, a display for displaying the sensed parameter in the shape of a waveform, said display including an erase bar that erases old data and enters new data to modify the waveform as said erase bar moves across said display, and a processor to receive said signal from said input device to modify the sweep rate of the said erase bar in response to the desired parameter established by the user.
1 Assignment
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Accused Products
Abstract
An algorithm is disclosed that enables the display for a medical ventilator to automatically adjust its wave characteristics depending on the settings for that ventilator established by the clinician. As the respiratory rate, or rate at which the ventilator provides breaths to the patient, is changed by the user, the rate of sweep of the waveform generator displaying that data is also changed to insure that the data is displayed in the most relevant manner. As another parameter, as the pressure limit in the patient circuit is set by the clinician, the waveform vertical scale is adjusted to make sure the particular limit of pressure is displayed. As the pressure limit or the respiratory rate are changed in the ventilator by the clinician, the waveform of he data displayed also is automatically modified to make that data best presentable to the clinician.
61 Citations
13 Claims
- 1. A system for controlling a waveform display of a parameter of a breathing gas delivered from a medical ventilator to a patient through a conduit, said system comprising an input device to enable a user to send a signal to the ventilator to establish a desired parameter in the gas delivered by the ventilator to the patient, a sensor for sensing in the gas delivered to the patient the desired parameter established by the user with said input device, said sensor providing a signal representative of such sensed parameter, a display for displaying the sensed parameter in the shape of a waveform, said display including an erase bar that erases old data and enters new data to modify the waveform as said erase bar moves across said display, and a processor to receive said signal from said input device to modify the sweep rate of the said erase bar in response to the desired parameter established by the user.
- 5. A system for controlling a waveform display of a parameter of a breathing gas delivered from a medical ventilator to a patient through a conduit, said system comprising an input device to enable a user to send a signal to the ventilator to establish a desired parameter in the gas delivered by the ventilator to the patient, a sensor for sensing in the gas delivered to the patient the desired parameter established by the user with said input device, said sensor providing a signal representative of such sensed parameter, a display for displaying the sensed parameter in the shape of a waveform having a vertical scale, and a processor to receive said signal from said input device to modify the vertical scale of the waveform in response to the desired parameter established by the user.
- 6. A medical ventilator system for delivering breaths to a patient and monitoring a parameter of the breaths, said system comprising a medical ventilator, an airway for delivering gas from said ventilator to the patient, said ventilator having means to manually set a parameter indicative of a desired parameter in the gas delivered to the patient, a sensor in said airway for sensing the desired parameter, a display for displaying a waveform having waveform having a vertical scale and having the sensed parameter as an input to form said waveform and a processor for modifying the vertical scale of said waveform to increase and decrease the vertical scale depending on the parameter manually set in said ventilator.
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13. A medical ventilator system for delivering breaths to a patient and monitoring a parameter of the breaths, said system comprising a medical ventilator, an airway for delivering gas from said ventilator to the patient, said ventilator having means to manually set a parameter indicative of a desired parameter in the gas delivered to the patient, a sensor in said airway for sensing the pressure in said airway of the gas delivered by said ventilator to the patient, a display for displaying a waveform representing the pressure sensed by said pressure sensor with respect to time, and a processor for modifying the vertical scale of said waveform to increase and decrease the vertical scale depending on the parameter manually set in said ventilator.
Specification