Health and Nutrition

November 18, 2011

Low Vitamin D Common in Spine Surgery Patients

Filed under: General Health,Nutrition,Vitamin D — Doc Joe @ 5:28 pm

November 2011

A new study indicates that many patients undergoing spine surgery have low levels of vitamin D, which may delay their recovery.

In a study of 313 patients undergoing spinal fusion surgery, orthopedic surgeons at Washington University School of Medicine in St. Louis found that more than half had inadequate levels of vitamin D, including one-fourth who were more severely deficient.

The researchers reported their findings at the 26th Annual Meeting of the North American Spine Society.

“Our findings suggest it may be worthwhile to screen surgery patients for vitamin D,” says Jacob M. Buchowski, MD, the study’s principle investigator. “We think those with insufficient levels of vitamin D may benefit from taking 50,000 international units of the vitamin once a week for eight weeks before surgery as this may help the recovery after spinal fusion surgery.”

Vitamin D helps with calcium absorption and patients with a deficiency can have difficulty producing new bone. They are at risk for a condition called osteomalacia. Unlike osteoporosis or osteopenia, which result from low bone mineral density, osteomalacia interferes with new bone formation.

All the patients in the study had spinal fusion surgery. In that procedure, surgeons remove discs between two or more vertebrae. The bones in the spine are then attached with hardware and treated with growth factors. As the spine heals, new bone begins to form and the vertebrae fuse together.

Dr. Buchowski became aware of the vitamin D problem when a patient in her 40s experienced a slow recovery after spinal fusion surgery.

“I was examining her and trying to figure out why the vertebrae didn’t fuse,” he said. “She mentioned that she had recently been diagnosed with vitamin D deficiency, and it was like a ‘light bulb’ went off.”

As a result, Dr. Buchowski, an Associate Professor of Orthopedic Surgery and Neurological Surgery, and his Washington University colleagues at Barnes-Jewish Hospital started routinely screening spinal fusion surgery patients for vitamin D deficiency.

Low vitamin D levels are known to be common in elderly patients. Surprisingly, in this study, the patients most likely to have inadequate levels of the bone-building vitamin were younger.

Those in the study averaged 55 years of age, 56% were female, 41% were obese and 95% were white. Although an earlier study had shown inadequate vitamin D levels in 43% of patients undergoing orthopedic procedures, this is the first look solely at spine surgery patients.

As a follow-up, Dr. Buchowski and his colleagues are planning a study to see whether there is a link between low vitamin D and poor outcomes following spinal fusion. In the meantime, he’s recommending that patients having orthopedic surgery ensure they’re getting enough vitamin D.

Presented at the 26th Annual Meeting of the North American Spine Society in Chicago, IL.

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