What is the technique used for catheter urine collection?

The technique used for catheter urine collection involves the use of a sterile flexible tube, which is inserted directly into the bladder through the urethra. This method ensures that the urine obtained is sterile and minimizes contamination from the surrounding tissues or external environment.

Utilizing a sterile tube allows for a direct collection from the bladder, making it particularly useful in clinical situations where a clean urine sample is necessary for accurate diagnostic testing. This technique is also beneficial when other means of collection, such as clean-catch methods, may not be feasible.

Other methods listed, such as collecting urine over a 24-hour period, involve different preservation requirements and are related to assessing kidney function or urine composition, rather than a direct catheterization procedure. Similarly, a suprapubic tap is a more invasive procedure used when catheterization is not possible or appropriate, and the mid-stream urine collection method is typically used for non-invasive sample collection from the urethra but does not guarantee the same sterility as catheterization.