Question

It is recommended that the urine sample size be standardized. An adequate sample of fresh urine is considered to be:

A) 1 ml
B) 5 ml
C) 10 ml
D) 15 ml

Answer 1

An adequate fresh urine sample for standard diagnostic tests is considered to be 10 ml. This accounts for the need for a representative sample while considering daily urine volume variations and the requirements for specific tests like clearance tests.

Step-by-step explanation:

An adequate sample of fresh urine is considered to be 10 ml. This volume is sufficient to perform various diagnostic tests and ensure a representative sample of the urine produced. The normal volume of urine excreted per day is between 600 ml to 2500 ml, with an average of 1500 ml/day. However, minimal amounts are required for specific tests such as clearance tests to assess renal function. Regulation of water output is critical as the body must produce a minimum urine volume of about 500 mL/day to eliminate wastes. Excessive urine production, known as polyuria, can occur due to conditions such as diabetes mellitus or diabetes insipidus, whereas low output, oliguria, may indicate dehydration or renal disease.