How do you know if the stone fragments have passed out?

In general, the passage of kidney stones can be assessed by observing urine color, checking for particles in the urine, monitoring symptom relief, measuring post-void residual urine volume, and performing imaging examinations. If a patient experiences difficulty passing stones, prompt medical attention is recommended to avoid delaying treatment. The specific methods are as follows:

1. Observe urine color

Stones may cause urine to appear dark yellow, orange, or red. When the stone is passed, the urine color may change accordingly.

2. Check for particles in the urine

During urination, a filter or filter paper can be used to catch any expelled stones. Examining the collected material can provide preliminary confirmation of whether stones have been passed.

3. Symptom relief

The movement and passage of stones may cause urinary tract pain. As the stone exits the urinary tract, the pain typically begins to subside gradually.

4. Measure post-void residual urine volume

When passing bladder stones, patients may experience difficulty or pain during urination. If after urinating the patient feels the bladder is completely emptied, this may indicate successful stone passage.

5. Imaging examinations

To accurately determine whether stones have been passed, it is advisable to visit a hospital promptly and undergo imaging tests—such as two-dimensional ultrasound, CT scan, or X-ray—under a physician’s guidance.

In daily life, drinking an appropriate amount of warm water is also recommended, as it may help facilitate the passage of stones.