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Injury ; 52 Suppl 1: S3-S6, Mar. METHODS: Concomitant perfusion changes were determined in the anterolateral and anteromedial periosteal sheath of the non-united bone ends and intramedullary nearest the osteosynthesis materials during their surgical removal on re-operation.

The blood flow in the periosteum and endosteum was recorded by a laser-Doppler flowmetric device using a novel approach. Control measurements were made at identical points of the right tibia.

RESULTS: Considerably lower blood flow values were measured along the tibial periosteal region of the re-operated limb than on the contralateral side the average perfusion unit PU was 76 vs. Perfusion values were markedly lower in the endosteal region average values of approx.

Our results highlight the association between local perfusion failure and the unfavorable outcome i. Microcirculatory measurements constitute a new area of improvement in planning the adequate treatment for fracture non-unions with an unclear aetiology. Further refinement of the laser-Doppler technique could have potential benefits for bone surgery and postoperative trauma care in the future.