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Hoffman II External Fixator Techniques – A Work-Around to use Small Pins in Large Clamps
  1. Maj Mike Rodger, Specialist Registrar in Trauma and Orthopaedics1,
  2. D Standley, Consultant Trauma and Orthopaedic Surgeon2 and
  3. M Kazel3
  1. 1MDHU Derriford, Plymouth
  2. 2MDHU Derriford, Plymouth
  3. 3US Army
  1. Derriford Hospital, Derriford Road, Crownhill, Plymouth, Devon, PL6 8DH 01752 202082 mike.rodger{at}doctors.org.uk

Abstract

We describe a novel technique to allow use of small pins in medium pin size clamps. Slipping a second 3 mm pin into the same clamp hole as the first allows the 5 mm clamp to bite securely on a 3 mm pin. This enables construction of an external fixator frame utilising 3 mm and 5 mm pins, as required to span the elbow, wrist and ankle. This extends the capabilities of the 5 mm clamp and reduces the need for extra materiel such as sets containing clamps to connect 3 mm pins to standard size rods.

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