Efficient storage of urodynamic signals by computer: application of FAN adaptive sampling
January 1989
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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.
- sample
- signal
- error
- pressure
- number
- measurement
- x i m
- sampling
- method
- integer
- storage
- detrusor
- computer
- adaptive
- urodynamic
- recording
- procedure
- difference
- urodynamic signals
- adaptive sampling
