Question 71

The needle will go completely through the vein.

Inserting the needle at a 45-degree angle can cause it to penetrate the vein entirely, resulting in a failed venipuncture. This angle may not provide the optimal entry point for successful blood collection.

A) The needle will collapse the vein.

This option is incorrect because collapsing the vein typically occurs when there is excessive negative pressure applied or if the vein is fragile. A 45-degree angle insertion does not directly cause vein collapse.

B) The needle will go completely through the vein.

This option is correct as inserting the needle at a 45-degree angle often increases the likelihood of the needle passing through the vein rather than entering it properly. This results in the failure to access the vein for blood collection.

C) The needle will miss the vein superficially.

This option is incorrect because missing the vein superficially would more likely occur if the needle is inserted at a very shallow angle. A 45-degree angle generally increases the chance of penetration rather than missing the vein entirely.

D) The needle will contact the upper wall of the vein.

This option is also incorrect because while contacting the upper wall may occur, it does not directly lead to a failed venipuncture. A 45-degree angle can still allow for successful access if the needle is positioned correctly.

Conclusion

The correct answer, that the needle will go completely through the vein, highlights the importance of proper angle during venipuncture. Other options either misinterpret the consequences of a 45-degree insertion or relate to different issues that do not directly lead to a failed attempt. Understanding the appropriate technique is crucial for successful blood collection.