The perioperative implementation of continuous peripheral nerve blocks is poorly described within the literature for replantation surgeries beyond digital replantation. The management of replantation patients presents a challenging balance between pain control and limb perfusion. We report the successful use of a continuous interscalene catheter in a therapeutically anticoagulated patient after midshaft humerus arm replantation. The benefits of the continuous peripheral nerve block for the patient included improved pain control and potentially improved limb perfusion making it a valuable component of this patient's treatment.