Episode 158.0 – Boxer’s Fracture

In this episode, we discuss Boxer's fractures and how to best manage them in the ED. https://media.blubrry.com/coreem/content.blubrry.com/coreem/Boxer_s_Fracture_eq.m4a Download One Comment Tags: Orthopedics, Trauma Podcast Video https://youtu.be/UreET5eLHas Show Notes Background: 40% of all hand fractures A metacarpal fracture can occur at any point along the bone (head, neck, shaft, or base) “Boxer’s” fractures classically at neck Most common mechanism: direct axial load with a clenched fist Most common metacarpal injured is the 5th A majority of these injuries are isolated injuries, closed and stable Examination: Ensure that this is an isolated injury May note a loss of knuckle contour or shortening A thorough evaluation of the skin is important Patients may also have fight bites and require irrigation and antibiotics Tender along the dorsum of the affected metacarpal Evaluate the range of motion as the commonly seen shortening results in extension lag For every 2 mm of shortening there is going to be a 7 degree decrease in ability to extend the joint Check rotational alignment of digits with the MCP and PIP at 50% flexion. Partially clench their fist and ensure that the axis of each digit converges near the scaphoid pole / mid wrist Deformity is often seen due to the imbalance of volar and dorsal forces Dorsal angulation AP, lateral and oblique views should be obtained on XR The degree of angulation is estimated with the lateral view NB: Normal angle between the metacarpal head and neck is 15 degrees Management: Most may be splinted with an ulnar gutter splint Must be closed, not significantly angulated, and not malrotated When splinting, place the wrist in slight extension, MCP (knuckles) at 90 degrees and the DIP and PIP in a relaxed, slightly flexed position A closed reduction is indicated if there is significant angulation “20, 30, 40” rule If angulation is more than: 20 in the middle finger metacarpal 30 in the ring finger metacarpal 40 in the pinky finger metacarpal Analgesia with a hematoma block or ulnar nerve block Reduction technique: https://www.aliem.com/2013/01/trick-of-trade-reducing-metacarpal/ Referral: May have mild deformity or decreased functionality and strength in hand grip after this injury Emergent evaluation if: Open fracture Neurovascular compromise Follow up: Refer to hand specialist Within 1 week if fractures of 4thand 5thmetacarpals with angulation 3 to 5 days if the 2ndand 3rd metacarpalsare affected Immobilized for three to four weeks in splint Healing may take up to six weeks Take Home Points: This is one of the most common fractures we will see as emergency physicians When evaluating these patients, ensure that this are no other more severe, life-threatening injuries, and pay particular attention to the skin exam so that you do not miss a fight-bite Reductions may be required if there is significant angulation, which is guided by the 20, 30, 40 rule Finally, emergent specialist evaluation is indicated if there is an open fracture or evidence of neurovascular compromise Read More