Which statement best describes capillary puncture sample limitations?

Which statement best describes capillary puncture sample limitations?

• A. It often yields limited sample amount
• B. It yields adequate sample for all tests
• C. It provides more accurate results than venipuncture
• D. It is rarely used in pediatrics

Answer: (A)

Capillary puncture samples are limited in volume. Because the blood is drawn from a small capillary bed (finger or heel), the amount collected is often much smaller than what venipuncture provides, making it difficult to perform a full panel of tests or repeat testing if needed. This constraint means tests must be selected carefully and, when more blood is required, a venous draw may be necessary. Additional factors like contamination with tissue fluid and potential hemolysis from squeezing the site can also affect results, further limiting the usefulness of capillary samples for some analyses. Therefore, the statement that it often yields limited sample amount best describes capillary puncture sample limitations. Capillary samples are not adequate for all tests, they do not inherently provide more accurate results than venipuncture, and they are commonly used in pediatrics, not rarely.

Capillary puncture samples are limited in volume. Because the blood is drawn from a small capillary bed (finger or heel), the amount collected is often much smaller than what venipuncture provides, making it difficult to perform a full panel of tests or repeat testing if needed. This constraint means tests must be selected carefully and, when more blood is required, a venous draw may be necessary. Additional factors like contamination with tissue fluid and potential hemolysis from squeezing the site can also affect results, further limiting the usefulness of capillary samples for some analyses. Therefore, the statement that it often yields limited sample amount best describes capillary puncture sample limitations. Capillary samples are not adequate for all tests, they do not inherently provide more accurate results than venipuncture, and they are commonly used in pediatrics, not rarely.