Objective: To investigate the risk factors forincreased drainage volume after transforaminal lumbar interbody fusion(TLIF).Methods: The clinical data of 218 patients treated with TLIF from January 2016 to October 2022 were retrospectively analyzed. All patients were routinely placed with drainage tube in the incision after surgery. 218 patients were divided into normal drainage volume group and increased drainage volume group with the median of drainage volume distribution as critical point. Gender, age, body mass index(BMI), smoking status,medical history,preoperative American Society of Anesthesiologists(ASA) grade, operative time, intraoperative blood loss, number of fusion segments, intraoperative endplate injury, and postoperative drainage tube placement time were compared between two groups.Univariate analysis was performed, and then multivariate Logistic regression analysis was performed to determine the risk factors for increased drainage volume after TLIF.Results: The median postoperative drainage volume distribution of 218 patients was 460 mL(60-1 220 mL), including 181 patients in the normal drainage volume group(drainage volume <480 mL) and 187 patients in the increased drainage volume group(drainage volume≥480 mL). The results of univariate analysis showed that there were no significant differences in gender, BMI, medical history, and ASA grade between the two groups(P>0.05). There were significant differences in age, smoking status, number of fusion segments, intraoperative endplate injury, intraoperative blood loss, operative time, and postoperative drainage tube placement time(P<0.05). Multivariate Logistic regression analysis showed that older age(OR=1.264, P=0.001), smoking(OR=2.186, P=0.006), larger number of fusion segments(OR=3.578, P=0.002), intraoperative endplate injury(OR=3.282, P=0.024) and longer placement time of postoperative drainage tube(OR=2.429, P=0.007) were independent risk factors for increased drainage volume after TLIF.Conclusion: This study shows that older age, smoking, larger number of fusion segments, intraoperative endplate injury, and longer placement time of postoperative drainage tube are independent risk factors for increased drainage volume after TLIF. |
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