The effect of epicondylitis bondages for the biomechanical point of view: An experimental model.

Questions: During extension of the elbow joint (test measurement) and exten sion of the wrist (control measurement), maximal bandage pressure is desire d on the extensor group of the forearm, especially of the M. extensor carpi radialis brevis (ECRB). Do the various commercial epicondylitis bandages p roduce a mechanical effect on the extensor group of the forearm and how do the maximal pressures of these bandages behave in direct comparison? Are th e pressures produced clinically relevant? Methods: Eleven different epicond ylitis bandage constructions were examined for their biomechanical effects. The exerted pressure was measured continously during the above-mentioned m ovements. A fist-closing strength of ca. 30 N was maintained for the necess ary pre-stressing of the forearm muscles. Results: Strap-type bandages were the only bandages to produce adequately high pressures. Bands applied at p ressures which approach those of the straps led to obstruction in bloodflow . Stocking designs showed no effect in respect to our study. Conclusion: Ba ndages which apply pressure to relieve the tendon insertion of the extensor muscles must, from a technical standpoint, be of a strap construction in o rder to build up adequate pressures to be effective.