CONTINUOUS POSITIONING APPARATUS AND METHODS
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Accused Products
Abstract
Improved apparatus and methods for non-invasively assessing one or more parameters associated with systems such as fluidic circulating systems (e.g., the circulatory system of a living organism). In a first aspect, an improved method of continuously measuring pressure from a compressible vessel is disclosed, wherein a substantially optimal level of compression for the vessel is achieved and maintained using dynamically applied dither perturbations (e.g., modulation) on the various axes associated with the vessel. In a second aspect, an improved apparatus and method are provided for monitoring hemodynamic parameters, such as blood pressure, in a continuous and non-invasive manner while operating under a single unifying scheme. One variant of this scheme using a simulated annealing (SA) type approach to determining and maintaining an optimal operating state.
0 Citations
22 Claims
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1-4. -4. (canceled)
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5. Transient-resistant apparatus for determining the blood pressure of a living subject, said apparatus comprising:
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a pressure transducer configured to be disposed proximate a blood vessel of said living subject and obtain pressure signals therefrom; and a processor configured to run a computer program thereon, said computer program comprising a plurality of instructions which are configured to, when executed, perform at least one simulated annealing related algorithm to control a placement of said pressure transducer, and to maintain said pressure transducer in an optimized operational state. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method of determining hemodynamic parameters of a living subject via a pressure transducer disposed on said subject, said pressure transducer configured to applanate said subject'"'"'s tissue and obtain an initial plurality of data of measured pulse pressure;
- said method comprising;
executing a randomly determined trial sequence; obtaining a second plurality of data regarding measured pulse pressure at least during said act of executing; processing said second plurality of data; and adjusting one or more parameters based at least in part on results obtained from said act of processing. - View Dependent Claims (13, 14, 15, 16, 17)
- said method comprising;
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18. Computer readable apparatus comprising media comprising a computer program having a plurality of instructions for determining an optimized location for placement of a pressure transducer on a living subject to obtain hemodynamic measurements therefrom, said plurality of instructions configured to, when executed:
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obtain a first pulse pressure measurement from said pressure transducer at a first location on a skin surface of said living subject; based at least in part on said pressure measurement, determine a first value indicative of a closeness of said first location to an optimal location; generate a trial sequence; direct said pressure transducer to relocate to at least one second location according to said trial sequence; obtain pressure measurements from said pressure transducer at said at least one second location; and based at least in part on said pressure measurements obtained, determine a second value, said second value being indicative of a closeness of said at least one second location to said optimal location. - View Dependent Claims (19, 20, 21, 22)
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Specification