Characterization of pressure changes in the lower urinary tract during coughing with special reference to the demands on the pressure recording equipment
✍ Scribed by Peter Thind; Per Bagi; Gunnar Lose; Svend Mortensen
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 350 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0733-2467
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✦ Synopsis
The exact dcniands on urodynamic cquipnient lor nicasurcnicnt of coughs and cough a\tKiated prcwurc changes in [he lower urinary tract have been analyled lrom high-speed pre'r'rurc recordings u\ing a douhle microtip tranduccr and a storage oscilloscope. The equipment was tested in vitro by the \tcp-tc\t method. The natural frequency response was 175.6 ti/ and the rise-lime 2.5 111s. rcsulting in accurate nicasurcnicnt'r of frequencies up to about 00 H I . which I \ way above the clinically nieasurcd frequencies. Four nicn and 2 wonien. all o l whoin were hcalthy volunteers. were examined i n the supine position with an empty bladder. Prc\surcb were nicasurcd in rhc bladder and in the external sphincter zone of the urethra. The \pectral power density o f the bladder and urethral pressures were c;llculatcd by Fourier analysi. The pressure changes in the urcrhra were in a11 volunteers equal lo or slower th;m in the bladder. The analysis of the spcctral power density showed that YY% ol'thc pressure change\ could be recorded with an instrunlent capable of recording Y HI Ircqucncic, 1.c , with ;I sampling rate of I X HI or more.