Question 47

The correct angle of insertion when performing venipuncture using the evacuated tube method is 30°.

When performing venipuncture using the evacuated tube method, the recommended angle of insertion is 30°. This angle helps facilitate the entry into the vein while minimizing discomfort for the patient.

A) 50°

An insertion angle of 50° is too steep for venipuncture, which can increase the risk of damaging the vein and lead to complications such as hematoma formation. The ideal angle is generally lower to ensure smooth access to the vein.

B) 30°

This is the correct angle of insertion for the evacuated tube method of venipuncture. At 30°, the needle is positioned optimally to enter the vein without excessive force, allowing for effective blood collection while reducing patient discomfort.

C) 90°

A 90° angle is inappropriate for venipuncture, as it is perpendicular to the skin surface and can cause trauma to the vein. This angle also increases the likelihood of missing the vein entirely, which is counterproductive to the procedure's goal.

D) 75°

While 75° is closer to the correct angle than some other options, it is still higher than the recommended 30°. Such an angle may lead to difficulties in accessing the vein properly and can lead to complications during the blood draw.

Conclusion

The angle of 30° is definitively the best choice for venipuncture using the evacuated tube method, as it balances effective access with patient safety. All other options either exceed the optimal angle or risk damaging the vein, thus making them unsuitable for this procedure.