Study On The Necessary Of Routine Laboratory Tests After Lumbar Posterior Fusion Surgery

Background:For patients undergoing lumbar posterior fusion surgery,many surgeons routinely perform laboratory tests within 3 days after surgery to monitor changes in the patient’s postoperative environment.However,is it necessary to perform routine laboratory tests 3 days after surgery for patients without serious complications? This study explored the need for routine laboratory testing of lumbar spine surgery by analyzing the incidence of routine laboratory abnormalities and their risk factors.Materials and Methods:A retrospective study including patient with lumbar degenerative disease undergoing lumbar posterior fusion surgery from May 2014 to May 2017 was conducted.The patient’s perioperative information and abnormal postoperative laboratory tests were recorded.The incidence of abnormalities in routine postoperative laboratory tests was calculated,and the risk factors for abnormalities in routine postoperative laboratory tests were analyzed by binary Logistic regression and ROC curves.Results:A total of 1915 patients who underwent lumbar posterior fusion surgery were included in the study.And 870 patients were ordered postoperative laboratory tests within 3 days after surgery without serious complications.Of these patients,only a small part required postoperative clinical intervention due to abnormal serum hemoglobin(2.53%),albumin(1.95%),serum potassium(0.92%)and serum calcium(6.55%).Based on multivariate logistic regression analysis,female and operative time were identified to be the risk factors for blood transfusion after lumbar spinal surgery.Age and operative time were the risk factors for requiring albumin supplementation after lumbar spinal surgery.And intraoperative blood loss and operative time were found to be the independent risk factors for requiring calcium supplementation after surgery.Conclusions:Due to a small number of postoperative clinical interventions for abnormal laboratory tests,we suggested that routine laboratory tests within 3 days after lumbar posterior fusion surgery in uncomplicated patients were unnecessary.Operative time was a potential risk factor for patients requiring clinical treatment after lumbar posterior fusion surgery.