Digital storage of urodynamic signals such as detrusor pressure and flowrate at a sufficiently high sampling rate (10 samples per second) to allow subsequent analysis requires considerable computer memory. A procedure for compressing these data by deleting redundant samples (the fan method of adaptive sampling) was tested. The method allows a flexible adaptation to specific hardware and a compromise between storage requirements and accuracy. In this study the number of samples required for adequate reconstruction of the detrusor pressure signal could be varied from 80% to 4% of the original number of samples by varying the average difference between reconstructed and original signal from 0.01 to 2 cm H2O. Fast components of the measurements (for example cough peaks) which were lost if a lower sampling rate or averaging was used to obtain equally low storage requirements were unaffected by this compression technique.

*Algorithms, *Information Systems, *Medical Informatics Computing, *Urodynamics, Humans, Software
hdl.handle.net/1765/14781
Urological Research: a journal of clinical and laboratory investigation in urolithiasis and related areas
Erasmus MC: University Medical Center Rotterdam

van Mastrigt, R, & Griffiths, D.J. (1989). Efficient storage of urodynamic signals by computer: application of FAN adaptive sampling. Urological Research: a journal of clinical and laboratory investigation in urolithiasis and related areas, 57–62. Retrieved from http://hdl.handle.net/1765/14781