Academic
Publications
Digital Signal Processing in Clinical Validation Studies with Impedance Plethysmography

Digital Signal Processing in Clinical Validation Studies with Impedance Plethysmography,Ravi Shankar,Mural Gopinathan,John G Webster

Digital Signal Processing in Clinical Validation Studies with Impedance Plethysmography   (Citations: 1)
BibTex | RIS | RefWorks Download
We provide here an automated method for calculating the volume change (V) from the tissue impedance change (Z) signal acquired using an impedance plethysmograph. This presents our approaches to signal processing in two of our studies: a longitudinal pathologic validation study on monkeys, and a human clinical validation study. In both these studies, plethysmographic data were acquired at three different locations simultaneously. The data were acquired for about 3 to 4 s in the case of monkeys. For human subjects, data were acquired for 3 to 6 s. Data collection was repeated multiple times with various external cuff pressures. We employed the signal averaging technique to get one average Z pulse, which was used to calculate the V value at each cuff pressure using Nyboer's equation. We provided a mechanism to automatically reject any noisy portion of the signal. Care was taken to minimize operator intervention in the process leading to a totally automated analysis of the signal. Such an automated system would be useful for real-time processing needed in long-term monitoring.
Published in 2008.
Cumulative Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
Sort by: