Aims. Little is known about the effect of haemorrhagic shock and resuscitation
on fracture healing. This study used a rabbit model with a femoral
osteotomy and fixation to examine this relationship. Materials and Methods. A total of 18 male New Zealand white rabbits underwent femoral
osteotomy with intramedullary fixation with ‘shock’ (n = 9) and
control (n = 9) groups. Shock was induced in the study group by
removal of 35% of the total blood volume 45 minutes before resuscitation
with blood and crystalloid. Fracture healing was monitored for eight weeks
using serum markers of healing and radiographs. Results. Four animals were excluded due to postoperative complications.
The serum concentration of osteocalcin was significantly elevated
in the shock group postoperatively (p < 0.0001). There were otherwise
no differences with regard to serum markers of bone healing. The
callus index was consistently increased in the shock group on anteroposterior
(p = 0.0069) and lateral (p = 0.0165) radiographs from three weeks
postoperatively. The control group showed an earlier decrease of
callus index. Radiographic scores were significantly greater in
the control group (p = 0.0025). Conclusion. In a rabbit femoral osteotomy model with intramedullary fixation,
haemorrhagic shock and resuscitation produced larger callus but
with evidence of delayed remodelling. Cite this article: Bone Joint J 2018;100-B:1234–40