Measuring multiple physiological parameters through blind signal processing of video parameters
First Claim
1. A patient support system comprisinga patient support apparatus embodied as a patient bed having a touch screen display and user inputs spaced from the touch screen display,a camera, anda controller coupled to the patient support apparatus and to the camera, the controller also being coupled to the touch screen display and to the user inputs, the controller configured to receive image data from the camera and to use blind signal processing image analysis to determine at least one of pulmonary and circulatory characteristics of a patient supported on the patient support apparatus and to determine a pulse transit time (PTT) of an amount of time taken for an arterial pulse pressure wave to travel from the patient'"'"'s aortic valve to a peripheral site, wherein the controller is also operable to control a motion system that is operable to reposition a patient supported on the patient bed and an air system that is operable to inflate and deflate at least one bladder of a mattress of the patient bed, wherein the PTT is used to trigger a change in operational characteristics of the patient support apparatus, wherein the change in the operational characteristics includes repositioning the patient using the motion system and changing inflation of the at least one bladder using the air system.
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Accused Products
Abstract
A patient support system includes a patient support apparatus, a camera, and a controller. The controller is configured to receive image data from the camera and to determine at least one of pulmonary and circulatory characteristics of a patient supported on the patient support apparatus.
30 Citations
20 Claims
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1. A patient support system comprising
a patient support apparatus embodied as a patient bed having a touch screen display and user inputs spaced from the touch screen display, a camera, and a controller coupled to the patient support apparatus and to the camera, the controller also being coupled to the touch screen display and to the user inputs, the controller configured to receive image data from the camera and to use blind signal processing image analysis to determine at least one of pulmonary and circulatory characteristics of a patient supported on the patient support apparatus and to determine a pulse transit time (PTT) of an amount of time taken for an arterial pulse pressure wave to travel from the patient'"'"'s aortic valve to a peripheral site, wherein the controller is also operable to control a motion system that is operable to reposition a patient supported on the patient bed and an air system that is operable to inflate and deflate at least one bladder of a mattress of the patient bed, wherein the PTT is used to trigger a change in operational characteristics of the patient support apparatus, wherein the change in the operational characteristics includes repositioning the patient using the motion system and changing inflation of the at least one bladder using the air system.
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17. A method of determining a circulatory patient characteristic corresponding to a patient supported on a patient support apparatus, the method comprising
receiving image data from a camera, determining a pulse transit time (PTT) of an amount of time taken for an arterial pulse pressure wave to travel from the patient'"'"'s aortic valve to a peripheral site and determining blood volume pulse information based on the image data using a controller of the patient support apparatus to perform blind signal processing image analysis, wherein the patient support apparatus is embodied as a patient bed having a touch screen display and user inputs spaced from the touch screen display, the controller being coupled to the touch screen display and to the user inputs, wherein the controller is also operable to control a motion system that is operable to reposition a patient supported on the patient bed and an air system that is operable to inflate and deflate at least one bladder of a mattress of the patient bed, determining with the controller a relative blood pressure value based on the blood volume pulse information corresponding to a face of the patient and to an extremity of the patient, and using the PTT to trigger a change in operational characteristics of the patient support apparatus, wherein the change in the operational characteristics includes repositioning the patient using the motion system and changing inflation of the at least one bladder using the air system.
Specification