心大血管外科術後患者における亜鉛欠乏と身体機能の関係(症例報告)
概要
Zinc deficiency can easily occur after cardiovascular surgery and is reportedly related to sarcopenia. Therefore, in the present study we investigated the relationship of serum zinc level and physical function in patients after cardiovascular surgery. The subjects were discharged outpatients visiting the rehabilitation department of our institution after open-heart surgery or coronary artery bypass graft surgery. The subjects were 17 patients (9 men and 8 women) with a mean age of 68.8 ± 10.0 years in whom dysgeusia (5 patients) or sarcopenia (5 patients) had been diagnosed. Two months after surgery we measured serum zinc levels, physical function, and skeletal muscle mass by a body composition analyzer and statistically analyzed their relationships. The mean serum zinc level was 65.4 ± 13.0 μg/dl. We recognized significant correlations of the serum zinc level with upper limb muscle mass, trunk muscle mass, and grip strength. Asymptomatic zinc deficiency might decrease physical function in patients who have been discharged from the hospital for cardiac rehabilitation. Further investigation of perioperative zinc transition is needed, in regard to improving postoperative cardiac rehabilitation.