Difficulty: Hard

Average Score: 43%

Which of the following actions should a medical assistant take when performing a capillary puncture

Rationale

Puncture parallel to the fingerprint.

Puncturing parallel to the fingerprint allows for optimal blood flow and minimizes the risk of damage to the tissue, ensuring a more successful capillary puncture. This technique also helps in obtaining a clearer and more accurate blood sample for testing.

A (Wipe away the first five drops of blood after puncturing.) YOUR ANSWER

Wiping away the first drops of blood is not a recommended practice as it can lead to the loss of essential components in the sample, such as glucose and other analytes. Furthermore, it may introduce contamination, compromising the integrity of the sample collected for testing.

B (Apply even pressure to the finger during the collection.) YOUR ANSWER

While applying pressure is important to facilitate blood flow, the term "even pressure" can be misleading. Excessive pressure may cause hemolysis or alter the composition of the blood sample, negatively impacting test results. Proper technique involves gentle, consistent pressure rather than just even pressure.

C (Puncture the index finger at the tip.) YOUR ANSWER

Puncturing at the tip of the index finger is not advisable as it can cause pain and may not yield an adequate blood sample. The sides of the fingertip are preferred sites for puncture because they are less sensitive and can provide a better flow of blood.

Conclusion

In performing a capillary puncture, proper technique is essential for obtaining accurate blood samples. Puncturing parallel to the fingerprint is the best method as it promotes effective blood flow and reduces the risk of tissue damage. Other choices, such as wiping away blood, applying uneven pressure, or puncturing at the tip of the finger, can compromise sample quality and patient comfort, highlighting the importance of adhering to established guidelines for capillary punctures.

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