Orthopedics Book

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Scapholunate Dislocation

Aka: Scapholunate Dislocation, Scapholunate Dissociation, Scapholunate Ligament Rupture, Scapholunate Tear, Complete Scapholunate Ligament Rupture, Scapholunate advanced collapse, SLAC Wrist
  1. Mechanism
    1. Fall on Outstretched Hand
    2. Scapholunate interosseous ligament is disrupted resulting in instability
  2. Symptoms
    1. Radial aspect Wrist Pain, worse with gripping
  3. Imaging
    1. Wrist XRay
      1. Scaphoid Bone and Lunate Bones separated 3 mm or more (aka Terry Thomas Sign, David Letterman Sign)
    2. Clenched-Fist View
      1. Accentuates widening between the Scaphoid Bone and the Lunate Bone
  4. Differential Diagnosis
    1. Scaphoid Fracture
    2. Distal Radius Fracture
  5. Associated Conditions
    1. Median Nerve injury
    2. Lunate Avascular Necrosis
  6. Management
    1. Immobilization in short arm volar splint
    2. Refer to orthopedics or orthopedic hand specialist
    3. Surgical repair
      1. Indicated for static dissociations
      2. Dynamic dissociations may be treated with 2-6 weeks of Forearm cast
  7. Complications
    1. Scapholunate advanced collapse (SLAC Wrist)
  8. References
    1. Eiff (2018) Fracture Management, Elsevier, Philadelphia, p. 99-101
    2. Swadron and Mallon in Herbert (2018) EM:Rap 18(12): 3-4

Complete tear of scapholunate ligament (C0435077)

Concepts Injury or Poisoning (T037)
SnomedCT 209602001
English Complete tear scapholunate lig, Complete tear of scapholunate ligament, Complete tear of scapholunate ligament (disorder)
Spanish desgarro completo de ligamento escafosemilunar (trastorno), desgarro completo de ligamento escafosemilunar
Sources
Derived from the NIH UMLS (Unified Medical Language System)


Rupture of scapholunate ligament of wrist (C2317169)

Concepts Pathologic Function (T046)
SnomedCT 430892004
English Rupture of scapholunate ligament of wrist, Rupture of scapholunate ligament of wrist (disorder)
Spanish ruptura de ligamento escafosemilunar de la muñeca, ruptura de ligamento escafosemilunar de la muñeca (trastorno)
Sources
Derived from the NIH UMLS (Unified Medical Language System)


Scapholunate advanced collapse (C3164615)

Concepts Disease or Syndrome (T047)
SnomedCT 447775001
English Scapholunate advanced collapse, Scapholunate advanced collapse (disorder)
Spanish colapso escafosemilunar avanzado (trastorno), colapso escafosemilunar avanzado
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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