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The Journal of Bone & Joint Surgery British Volume
Vol. 75-B, Issue 4 | Pages 645 - 649
1 Jul 1993
Hardy Conlan D Hay S Gregg P

The changes in serum adjusted ionised calcium and parathyroid hormone (PTH) were prospectively studied in 32 patients with isolated tibial fractures, treated conservatively. We measured serum albumin, adjusted total calcium, phosphate, pH, adjusted ionised calcium and PTH at intervals until the fractures had healed. The mean ionised calcium adjusted for pH fell within 24 hours of injury, and then rose to a peak at between four and six weeks. These changes cannot be explained by changes in serum pH or PTH. The restoration of normal ionised calcium levels after fracture coincided with the period when the callus was being calcified. Analysis of the changes in ionised calcium, phosphate and PTH suggests that PTH levels alter in response to changes in ionised calcium levels. PTH is highest immediately after fracture and lowest, often not recordable, at six weeks. The cause of the changes in the ionised calcium level has yet to be elucidated.


The Journal of Bone & Joint Surgery British Volume
Vol. 73-B, Issue 3 | Pages 519 - 520
1 May 1991
Conlan D Gregg P


The Journal of Bone & Joint Surgery British Volume
Vol. 71-B, Issue 5 | Pages 858 - 858
1 Nov 1989
Conlan D