Background: To explore the value of human data from the Zhuang population via predicting the diameter of the hamstring tendon autograft in anterior cruciate ligament (ACL) reconstruction and determining the feasibility of preoperative ultrasound for prediction. Methods:In total, 24 Zhuang patients who underwent ACL reconstruction with a 4-strand semitendinosus and gracilis tendon autograft (4 S-STG) were enrolled in this study. Before the operation, the affected semitendinosus tendon (ST) was examined by ultrasonography, and its length, diameter, cross-sectional area, and circumference were measured. The patients' basic information and body data, ie, height, weight, body mass index, lower limb length injured, and thigh circumference injured, were recorded. Their ST and gracilis tendon lengths and diameters and 4 S-STG diameter were measured during the operation. A correlation analysis was conducted between the ultrasound measurement results and human data and intraoperative tendon measurements. Results:The ST diameter measured by ultrasound was correlated with the ST length and ST diameter measured during operation, and the ST circumference measured by ultrasound was correlated with the ST diameter measured during operation. The patients' body weight can be used to distinguish a 4 S-STG diameter of ≥8 mm (P < .01, mean difference = 11.59). The area under the receiver operating characteristic curve of body weight was 0.829. The final graft diameter ≥8 mm could be predicted with a body weight of 61.5 kg as the cutoff point; the sensitivity and specificity were 72.2% and 83.3%, respectively. Conclusion:In Zhuang patients undergoing ACL reconstruction with 4 S-STG, body weight more accurately predicted graft diameter than preoperative semitendinosus diameter.
Purpose: To evaluate the feasibility of using ultrasonography to preoperatively predict the autologous hamstring graft diameter for anterior cruciate ligament (ACL) reconstruction in the Zhuang population and determine a reliable measurement level using ultrasound.Methods: Twenty-four Zhuang patients who were scheduled for ACL reconstruction using four-strand semitendinosus tendon (ST) and gracilis tendon (G) (4S-STG) autografts were included in this study. Ultrasonographic examinations of the ST and the G on the damaged side were conducted before the operation. We recorded the transverse diameter (TD), anterior–posterior diameter (APD), cross-sectional area (CSA), and perimeter (P) of the tendons. The measurements were obtained from two levels of the tendons: the widest point of the medial femoral epicondyle (level 1) and the myotendinous junction of the sartorius (level 2). We also calculated the combined (ST + G) TD, APD, CSA, and p values. Then, we obtained the intraoperative measurements. The correlation between the ultrasonic and intraoperative measurements was analyzed, and the advantages of the ultrasonic measurements at the two different levels were compared.Results: When we measured at level 1, we found that part of the ultrasonic measurements were correlated with intraoperative measurements. The preoperative CSA of the G (P-GCSA) can be used to distinguish a 4S-STG autograft diameter of ≥8 mm (p < 0.01, mean difference = 3.7). The area under the P-GCSA curve was 0.801 (p < 0.05). A P-GCSA of 8.5 mm2 could be used to predict a 4S-STG autograft diameter of ≥8 mm with a sensitivity of 61.1% and specificity of 83.3%. However, there was no correlation between the ultrasonic and intraoperative measurements at level 2.Conclusion: Preoperative ultrasound can be used to predict the sufficient diameter of 4S-STG autografts when considering patients from Zhuang who are undergoing ACL reconstruction. The ultrasonic measurement should be obtained at the widest point of the medial femoral epicondyle.
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