Undisplaced Olecranon Frx

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- Definition:
      - displacement of less than 2 mm;
      - no increase in minimal degree of separation of 90 deg flexion of elbow;
      - usually frx gaps dorsally, and some separation of fragments occurs, which
            leads to joint incongruity;
            - dorsal gapping w/ displacement of proximal fragment blocks extension;
      - patients are able to extend the elbow actively against gravity;

- Treatment:
    - treated by immobilization in long arm cast w/ elbow in 45 deg to 90 deg
          of flexion for a short time;
    - do not place elbow in full extension (stiffness), & if frx is not stable
          in flexion, it will not be stable in extension;
    - expect bony union in 6-8 weeks, but after 3 weeks, begin ROM, avoiding flexion
        past 90 deg until bone healing is complete radiographically;
    - in elderly pts, period of immobilization should be even < 3 weeks;
          - try a sling for a few days until the pt is comfortable for ROM;
    - despite immobilization, be wary of displacement as triceps pull is frequently
          sufficient to cause displacement;