What are the forms of cystometry used in bladder pressure assessment?

Updated: Jan 16, 2020
  • Author: Pamela I Ellsworth, MD; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Answer

There are several forms of cystometry. A simple cystometry can be performed with a catheter and a syringe or manometer held 15 cm above the patient’s symphysis pubis. The advantage of this is that it is inexpensive and readily available; however, exact measurements of bladder pressure and determination of compliance are not possible with this method.

Single-channel cystometry involves recording intravesical pressure during filling with a single catheter. A major disadvantage of the single-channel technique is that increases in intra-abdominal pressure (IAP) may result in elevated detrusor pressure readings.

Multichannel cystometry is performed with the use of a second catheter to measure IAP. The catheter may be placed in the vagina or, more commonly, the rectum.


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