Article Text

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}


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.

Statistics from

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.