超声测量腰椎棘突间距变化率学习曲线的初步研究OA

Objective To analyze the learning curve associated with ultrasound measurement of the change rate of lumbar spinous process distance in patients with lumbar disc herniation.Methods A retrospective analysis was conducted on 90 pa-tients with lumbar disc herniation who underwent ultrasound measurement of the change rate of lumbar spinous process dis-tance from October 2018 to October 2020.Patients were sequentially numbered from 1 to 90 according to their visit order.All ultrasound measurements were performed by the same physician.Examination time was recorded for each patient.The cumula-tive sum analysis(CUSUM)method was used to plot the learning curve scatter diagram,which was then fitted with a polynomi-al function to calculate the inflection point(turning point)of the curve.Based on this turning point,patients were divided into a learning exploration group and a learning stability group.Intergroup comparisons of various indicators were performed to veri-fy the existence of the learning curve.Results(1)The best-fit simulation function for the learning curve was Y=8.75+1.86X-0.05X2+0.000 3X3(R2=0.951,P＜0.05),with the turning point identified at the 27th case.(2)There were no statistically signifi-cant differences between the learning exploration group and the learning stability group regarding age,sex,body mass index(BMI),disease duration,Oswestry disability index(ODI)scores,or the change rate of lumbar spinous process distance(P＞0.05).However,the mean examination time was significantly longer in the learning exploration group(3.88±1.30)min com-pared to the learning stability group(2.21±0.32)min(P＜0.05).Conclusion Ultrasound measurement of the change rate of lumbar spinous process distance exhibits a distinct learning curve.The turning point occurs at the 27th case.Once the stable phase is reached,the average examination time stabilizes at approximately(2.21±0.32)min.