ABSTRACT
Figure 40.4 Ureteral orifi ce. Once placed into the opening, the catheter can be advanced up the ureter usually to the 20 cm mark at the ureteral orifi ce. Markings on the catheter usually represent 1 cm of length, with each 5 cm marked by a thicker band; therefore, for a 20 cm insertion, the catheter will be advanced to four bands. The catheter should be placed slowly to decrease ureteral irritation and bleeding and postoperative hematuria. If an indwelling ureteral stent is used, a 20 cm stent is used in women ≤62 inches and a 30 cm stent in women ≥72 inches. The following formula can be used as a guide for determining stent length: height (inches) minus 42. Stents are measured in even number length; therefore, an odd number result should be rounded up to the closest even number.
