Chronic subdural hematoma is one of the most common diseases encountered in neurosurgical practices. The relationship between the case number of chronic subdural hematoma and seasons has not been reported until now. The relationship between recurrence rate of chronic subdural hematoma and seasons has not been reported, too. We examined the monthly case number of and recurrence case number of chronic subdural hematoma in our hospital.
The examination included 769 adult patients who had undergone the first one burr-hole surgery between January 2000 and December 2010. We examined the monthly number of cases (recurrence cases and non-recurrence cases), recurrence rate, and recurrence risk factor.
The number of cases was higher in August, April, July and September. November and March had few cases. Recurrence rate was highest in July and lowest in December. We found an association between age and monthly recurrence rate among a recurrence risk factor.
We think that there is an association between the daily life activity of the elderly person and case number of chronic subdural hematoma. The daily life activity of elderly persons shows seasonality. Therefore, we think that the case number of chronic subdural hematoma shows seasonality. To decrease the recurrence rate, examination of the postoperative volume of infusion and an appropriate rest period are necessary.
抄録全体を表示