A Modified Posterior Approach Preserves Femoral Head Oxgenation During Hip
Steffen RT, De Smet KA, Murray DW, Gill HS 2010 Mar 22
Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences,
University of Oxford, Nuffield Orthopaedic Centre, Oxford, UK.
In 11 patients, the oxygenation was measured in the superolateral quadrant of
the femoral head during resurfacing with a modified posterior approach, designed
to preserve the blood supply, using a gas-sensitive electrode. These were
compared with measures from 10 patients in whom the standard posterior approach
was used. The modified approach patients maintained a significantly (P < .005)
higher amount of relative oxygenation after the approach, 78% (standard
deviation [SD], 45%) vs 38% (SD, 26%), and acetabular component implantation,
74% (SD, 56%) vs 20% (SD, 28%). The modified posterior approach, unlike the
standard extended approach, does not significantly compromise the blood supply
to the head; and we recommend this approach be considered for hip resurfacing.