External fixation is used as treatment for trauma. Missing the manufacturer’s specific key makes removing the device difficult. Britnell et al reported the use of an oxygen cylinder key to remove an external fixator.1
The five-hole pin clamp can be used for removal of an external fixator. This is an individual piece of non-sterile equipment that can be found in trauma theatres and fits on to the pin-to-rod coupling of the Hoffman II® external fixation system (Stryker, Kalamazoo, MI, US) (Fig 1). This will prevent unnecessary use of sterile equipment, saving time and money, and leaving valuable kit available. This technique has been used in our department without any complications.
Figure 1.

Five-hole pin clamp and pin-to-rod coupling on engagement. Once engaged it will enable the removal of the Hoffmann II® external fixation system.
Reference
- 1.Britnell WG, McDonnell SM, Handley R. The use of an oxygen cylinder key for removal of a Hoffmann II external fixator. Ann R Coll Surg Engl 2011; 93: 417. [DOI] [PMC free article] [PubMed] [Google Scholar]
