How To Apply a Long Arm Splint By Miranda Lewis, MD, University of Washington Reviewed / Revised Jul 2021 | Modified Sep 2022 View Patient Education Indications Contraindications Complications Equipment Positioning Step-by-Step Description of Procedure Aftercare Warnings and Common Errors Tips and Tricks Topic Resources How To Apply a Long Arm Splint Long arm splints are devices applied for elbow and proximal forearm injuries in order to limit flexion and extension of the elbow.