Fig. 3. Anatomic drawing of right forearm with the median cubital vein removed shows how a steep trajectory during intravenous cannulation in the proximal forearm could directly traumatize the anterior interosseous nerve. The anterior interosseous nerve fascicles of the median nerve also could be injured in the antecubital fossa by a needle stick. In addition, edema or hematoma could cause nerve compression in the forearm if compartment expansion is limited by fibrous sheaths or bands.