Cranioplasty without Periosteal Dissection Reduces Blood Loss in Pi-Plasty Surgery for Sagittal Synostosis.

BACKGROUND/AIMS: Cranioplasty is often accompanied by a substantial oozing bleeding from the bone surface and bone edges. Our aim was to measure if strict subgaleal dissection without any periosteal release reduces blood loss during pi-plasty surgery for sagittal synostosis. METHOD: A group of 32 children who underwent pi-plasty surgery at the Sahlgrenska University Hospital between 2010 and 2014 for premature sagittal synostosis with traditional subgaleal dissection combined with incision and release of the periosteum adjacent to the osteotomy lines was compared to a group of 7 children who underwent pi-plasty with strict subgaleal dissection and osteotomy through the bone with the periosteum attached. Information about blood loss and body weight was extracted from medical records. RESULTS: The blood loss in the group of 7 children with strict subgaleal dissection was 102 ± 86 mL (mean ± SD) (10 ± 7 mL/kg) compared to 320 ± 119 mL (32 ± 12 mL/kg) in the control group with traditional periosteal release (p < 0.001). CONCLUSION: Intact periosteum at the osteotomy lines significantly reduces blood loss in pi-plasty surgery for sagittal synostosis. The mechanism is likely because of preserved veins between the bone surface and periosteum.