ABSTRACT
Figure 26.4. Ureteral orifice. Once placed into the opening, the catheter can be advanced up the ureter usually to the 20-cm mark at the ureteral orifice. 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.
