Will not holding urine affect the results of a kidney examination?

If only a kidney ultrasound is performed, not holding urine usually does not affect the test results. However, if examination of the fallopian tubes or bladder is required, not holding urine may impact the accuracy of the results. The specific analysis is as follows:

1. No effect

In general, when undergoing ultrasound or CT scans, patients do not need to hold urine. In fact, having a full bladder might interfere with the examination. Since the kidneys are solid organs, kidney examinations mainly focus on assessing the position, shape, and any pathological changes of the kidneys. It is advisable to drink water moderately before the exam while remaining fasting, avoiding excessive fluid intake.

2. Effect

When patients require evaluation of the lower ureter or bladder, they must hold urine to keep the bladder adequately filled. A full bladder allows clearer visualization of stones or space-occupying lesions in the lower ureter and bladder, enabling more accurate identification of abnormalities and facilitating subsequent diagnosis and treatment. Therefore, during color Doppler ultrasound examinations, failure to hold urine may actually impair the quality of the imaging results.

Hence, depending on the specific type of kidney examination, different preparation requirements apply. Patients should consult their doctor in advance for appropriate guidance prior to the test.