CPT® Code 51797

Add-On Code

Voiding pressure studies, intra-abdominal (ie, rectal, gastric, intraperitoneal) (List separately in addition to code for primary procedure)

Voiding pressure studies, specifically intra-abdominal measurements, are diagnostic procedures that assess the pressure exerted within the abdominal cavity during the act of voiding. This procedure is essential for understanding how much effort a patient must exert to successfully empty their bladder. During the study, a catheter is inserted into the rectum to facilitate the measurement of intra-abdominal pressure. A specialized device is utilized to accurately record this pressure while the bladder is filled with fluid. As the patient attempts to void, the intra-abdominal pressure is monitored and documented. It is important to note that multiple bladder fills may be required to ensure a comprehensive evaluation of the intra-abdominal pressure. The physician interprets the data collected, specifically the intra-abdominal voiding pressure, and compares it to the total bladder (intravesical) voiding pressure. This comparison is crucial for determining the true intravesical pressure during the voiding process. The intra-abdominal voiding pressure can be assessed in various locations, including the rectal, gastric, and intraperitoneal areas, and is reported separately in conjunction with a primary bladder voiding pressure study.