What does urinary Ca mean?

Urinary calcium (urine Ca) refers to the amount of calcium in the urine, commonly used to evaluate the body's calcium metabolism. The details are as follows:

Calcium in the urine mainly comes from intestinal absorption and bone metabolism. Under normal conditions, urinary calcium excretion is balanced with the amount of calcium absorbed by the intestines and calcium turnover in the bones. Urine Ca can be measured through urinalysis or 24-hour urine collection. Normally, the reference range for urine Ca is 2.7–7.5 mmol/24h. Values exceeding this range may be associated with high dietary calcium intake, hypercalcemia, hyperparathyroidism, hyperthyroidism, multiple myeloma, leukemia, or bone metastases from malignant tumors. In such cases, timely medical evaluation and appropriate treatment are necessary.

If urine Ca test results are abnormal, a comprehensive assessment combining other clinical symptoms and laboratory findings is required to determine the specific underlying cause and develop an appropriate treatment plan. If any discomfort occurs, prompt medical consultation is recommended to prevent adverse outcomes.