What is a urine specimen that avoids the first and last voided urine called?

What is a urine specimen that avoids the first and last voided urine called?

• A. Random Specimen
• B. Clean-catch Specimen
• C. First Void Specimen
• D. 24-Hour Specimen

Answer: (B)

A urine specimen that avoids the first and last voided urine is called a clean-catch specimen. This type of specimen is collected to get a sample that is less likely to be contaminated by bacteria or substances that may be present in the urethra or on the genitalia. The process involves the patient starting to urinate, then stopping to collect a midstream portion of the urine, which provides a more accurate representation of what is present in the bladder at that moment. This technique is particularly useful for diagnosing urinary tract infections, as it ensures that the sample is as sterile as possible. In contrast, a random specimen is collected at any time without special preparation, making it susceptible to contamination. A first void specimen refers to urine that is collected from the first urination of the day, while a 24-hour specimen is collected over a full day to measure substances in urine over that time period but does not focus on avoiding the first and last void. These distinctions clarify why the clean-catch specimen is the correct choice in this context.

A urine specimen that avoids the first and last voided urine is called a clean-catch specimen. This type of specimen is collected to get a sample that is less likely to be contaminated by bacteria or substances that may be present in the urethra or on the genitalia. The process involves the patient starting to urinate, then stopping to collect a midstream portion of the urine, which provides a more accurate representation of what is present in the bladder at that moment. This technique is particularly useful for diagnosing urinary tract infections, as it ensures that the sample is as sterile as possible.

In contrast, a random specimen is collected at any time without special preparation, making it susceptible to contamination. A first void specimen refers to urine that is collected from the first urination of the day, while a 24-hour specimen is collected over a full day to measure substances in urine over that time period but does not focus on avoiding the first and last void. These distinctions clarify why the clean-catch specimen is the correct choice in this context.