Method and Device for Determining the Perfusion of Blood in a Body Member
First Claim
1. A method of determining the perfusion of blood in a body member (5), the method comprising the steps of producing electrical measuring signals from a non-invasive photometric measuring process, normalizing the electrical measuring signals and determining a perfusion index (Perf) from the normalized signals, using an energy value (A) of at least one signal pulse.
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Abstract
The invention relates to a method and device for determining the perfusion of blood in a body member. Furthermore, the invention relates to a computer program for determining the perfusion of blood in a body member. To provide a technique to ensure that the actual patient perfusion condition does correlate with the calculated perfusion index value over a broad variety of patient conditions, a new method of determining the perfusion of blood in a body member is suggested, the method comprising the steps of: producing electrical measuring signals from a non-invasive photometric measuring process, normalizing the electrical measuring signals and determining a perfusion index from the normalized signals, using an energy value of at least one signal pulse.
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10 Claims
- 1. A method of determining the perfusion of blood in a body member (5), the method comprising the steps of producing electrical measuring signals from a non-invasive photometric measuring process, normalizing the electrical measuring signals and determining a perfusion index (Perf) from the normalized signals, using an energy value (A) of at least one signal pulse.
- 8. A device (20) for determining the perfusion of blood in a body member (5), comprising a signal component (21) adapted for producing electrical measuring signals from a non-invasive photometric measuring process, and a determining component (22) adapted for normalizing the electrical measuring signals and for determining a perfusion index (Perf) from the normalized signals, using an energy value (A) of at least one signal pulse.
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10. A computer program (23) for determining the perfusion of blood in a body member (5), comprising computer program instructions to determine a perfusion index (Perf) from normalized electrical measuring signals from a non-invasive photometric measuring process, using an energy value (A) of at least one signal pulse, when the computer program (23) is executed in a computer (22).
Specification