Michael talked about Ischemia in the past here. I found a study earlier that suggested that ischemia of cartilage canals may reduce height growth. Since intense clamping transiently affects the blood vessels to the cartilage it is important to study this.
Chondro-osseous growth abnormalities after meningococcemia. A clinical and histopathological study.
“The cases of nine children who survived the acute stage of meningococcal septicemia and secondary disseminated intravascular coagulation were reviewed. All of the children had major orthopaedic problems as a result of the acute disease. Detailed histological studies were performed on specimens of bone and cartilage, obtained when these patients had either acute amputation for gangrene or subsequent revision for a chondro-osseous deformity. In the specimens that were obtained from the children who had acute gangrene, the histological changes included small-vessel thrombi[blood vessel clot], osteonecrosis, subperiosteal new-bone formation, cortical disruption, cellular disorganization in the physis, and medullary inflammation. These findings were compatible with a combination of inflammation (acute osteomyelitis) and ischemia. In the specimens that were obtained during revision of the amputation, three years or more after the initial infectious or ischemic process, the clinically relevant findings involved the epiphyses and physes. The growth plates showed variable permanent ischemic damage. Bone bridges connecting the epiphysis and metaphysis were observed in various stages of formation, including several early bridges with involvement of only the physis and metaphysis. Endosteal and cortical bone, in contrast, showed complete recovery with no evidence of permanent ischemic damage. We concluded that children who survive meningococcal septicemia are at high risk for complex orthopaedic problems, both acute and chronic. The disseminated intravascular coagulation and focal infections of the acute phase are primarily responsible for the vascular injuries to the growing chondro-osseous tissues. Ischemic changes also selectively involve the physeal circulation, but may take several years to adversely affect longitudinal and transverse growth of bone.”
Image of a growth plate clot:
Growth plate with abnormal “micro” growth plate like structure:
