[Analysis of hidden blood loss after percutaneous kyphoplasty for osteoporotic vertebral compression fracture and its influencing factors]

OBJECTIVE

To investigate the hidden blood loss and related risk factors of osteoporotic vertebral compression fractures after percutaneous kyphoplasty.

METHODS

The clinical data of 153 patients with osteoporotic vertebral compression fractures who underwent percutaneous kyphoplasty from March 2015 to December 2017 were retrospectively analyzed, including 55 males and 98 females, aged 68 to 87(78.6±11.4) years old. Erythrocyte specific volume was collected before and after operation to calculate the hidden blood loss. The influence of sex, age, body mass index, bone mineral density, diabetes mellitus and hypertension, operation mode (unilateral or bilateral), operation time, operative segment and number, loss height of vertebral body and recovery height ratio on hidden blood loss was analyzed by multiple linear regression model.

RESULTS

Postoperative hidden blood loss was (287.7±68.5) ml. Multivariate linear regression analysis showed that the history of diabetes mellitus (β=2.405, P=0.012), the mode of operation(β=3.042, P<0.001), the time of operation (β=2.043, P=0.038), the operative segment (β=1.993, P=0.043), the number (β=0.374, P<0.001), the loss of vertebral height (β=2.785, P=0.003) and the recovery ratio(β=7.301, P<0.001) were correlated with occult hemorrhage.

CONCLUSIONS

There is a certain degree of occult hemorrhage in kyphoplasty for osteoporotic vertebral compression fractures. The risk factors of hidden hemorrhage are diabetes history, operation method, operation time, operative segment and number, loss of vertebral height and recovery ratio.