44. Which of the following is the correct angle of insertion when performing venipuncture using the evacuated tube method?
Answer: B
The correct angle of insertion when performing venipuncture using the evacuated tube method is 30°.
Venipuncture using the evacuated tube method should be performed at an angle of 30° to ensure optimal access to the vein while minimizing the risk of complications such as puncturing through the vein.
A) 50°
An angle of 50° is too steep for venipuncture using the evacuated tube method. This angle may increase the risk of puncturing through the vein or causing discomfort to the patient.
B) 30°
This is the correct angle for venipuncture using the evacuated tube method. At 30°, the needle can easily enter the vein without excessive trauma, making it the most effective angle for successful blood collection.
C) 90°
A 90° angle is inappropriate for venipuncture as it would require the needle to be inserted straight into the vein, which could lead to complications such as hitting the back wall of the vein or causing significant discomfort.
D) 75°
While 75° is closer to the ideal angle than some other options, it remains excessively steep for the evacuated tube method. This angle can also pose a risk of damaging the vein or complicating the blood draw process.
Conclusion
The correct angle of 30° is crucial for successful venipuncture, as it balances effective access to the vein with patient comfort. Options A, C, and D fail to provide the ideal angle, leading to potential complications and ineffective procedures. Thus, B is definitively the best choice for this procedure.