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2 - Setting up the equipment
- By Lucy Swithinbank, Southmead Hospital
Edited by Ranee Thakar, Philip Toosz-Hobson, Lucia Dolan
Book:

Urodynamics Illustrated

Published online:

05 February 2014

Print publication:

01 October 2011, pp 5-20
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Summary

Urodynamic equipment varies in complexity and a range of urodynamics machines. External pressure transducers are mounted on the urodynamic equipment and connected to the fluid-filled lines. A fluid-filled pressure catheter is placed in the bladder to measure intravesical pressure, and a second catheter is inserted into the rectum or the vagina to measure intra-abdominal pressure. Solid-state catheters with a single-tip transducer inserted into the rectum and covered with a condom, sheath or gloved finger, can be used to measure intra-abdominal pressure. Setting up can be considered as connecting the transducers and filling line and setting zero pressure. The calibration of solid-state catheter-tip transducers should be checked regularly. This requires that the transducers are immersed to a set depth in water, rather than raised in air, or by means of a special calibration chamber which is capable of generating pressures in centimetres of water.