Final answer:
The proper size of the drill pin used in the distal biceps repair tension slide technique is 3.0mm, which is crucial for the correct placement of the anchor in the procedure.
Step-by-step explanation:
The size of the drill pin used in the distal biceps repair tension slide technique is B. 3.0mm. In orthopedic surgery, particularly when repairing the biceps tendon at the elbow, precise instrumentation is critical to ensure successful outcomes. The tension-slide technique is a common method used for this type of procedure, and requires a specific drill pin diameter for the repair system to function properly. Choosing the correct size, in this case, a 3.0mm drill pin, is essential for the proper placement of the anchor and to prevent complications such as tendon re-rupture or improper fixation.