Nirschl release appears to be a very successful technique for surgically su
itable cases of tennis elbow. However, although the drilling or decorticati
on aspect of the procedure was thought to be of benefit to the immediate ou
tcome, this has not actually been confirmed. This randomised double blind c
omparative prospective trial shows that drilling confers no benefit and act
ually causes more pain, stiffness, and wound bleeding than not drilling.