Dynamic Sonography for Snapping Knee Syndrome Caused by the Gracilis Tendon

2017 ◽  
Vol 37 (3) ◽  
pp. 803-804 ◽  
Author(s):  
Chen-Yu Hung ◽  
Ke-Vin Chang ◽  
Stanley Lam
Keyword(s):  
Gracilis Tendon ◽  
Snapping Knee

scholarly journals Snapping knee caused by the gracilis tendon: A case report with an anatomical study

2014 ◽  
Vol 1 (2) ◽  
pp. 77-80 ◽  
Author(s):  
Daisuke Seino ◽  
Hiroshi Nakayama ◽  
Fumiaki Imamura ◽  
Takatoshi Moro-oka ◽  
Shinichi Yoshiya
Keyword(s):  
Case Report ◽  
Anatomical Study ◽  
Gracilis Tendon ◽  
Snapping Knee

Predictive Factors for Hamstring Autograft Diameter in Anterior Cruciate Ligament Reconstruction

2019 ◽  
Author(s):  
Willem M.P. Heijboer ◽  
Mathijs A.M. Suijkerbuijk ◽  
Belle L. van Meer ◽  
Eric W.P. Bakker ◽  
Duncan E. Meuffels
Keyword(s):  
Anterior Cruciate Ligament ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Acl Reconstruction ◽  
Cruciate Ligament ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Model ◽  
Gracilis Tendon ◽  
Thigh Circumference ◽  
Anterior Cruciate

AbstractMultiple studies found hamstring tendon (HT) autograft diameter to be a risk factor for anterior cruciate ligament (ACL) reconstruction failure. This study aimed to determine which preoperative measurements are associated with HT autograft diameter in ACL reconstruction by directly comparing patient characteristics and cross-sectional area (CSA) measurement of the semitendinosus and gracilis tendon on magnetic resonance imaging (MRI). Fifty-three patients with a primary ACL reconstruction with a four-stranded HT autograft were included in this study. Preoperatively we recorded length, weight, thigh circumference, gender, age, preinjury Tegner activity score, and CSA of the semitendinosus and gracilis tendon on MRI. Total CSA on MRI, weight, height, gender, and thigh circumference were all significantly correlated with HT autograft diameter (p < 0.05). A multiple linear regression model with CSA measurement of the HTs on MRI, weight, and height showed the most explained variance of HT autograft diameter (adjusted R 2 = 44%). A regression equation was derived for an estimation of the expected intraoperative HT autograft diameter: 1.2508 + 0.0400 × total CSA (mm2) + 0.0100 × weight (kg) + 0.0296 × length (cm). The Bland and Altman analysis indicated a 95% limit of agreement of ± 1.14 mm and an error correlation of r = 0.47. Smaller CSA of the semitendinosus and gracilis tendon on MRI, shorter stature, lower weight, smaller thigh circumference, and female gender are associated with a smaller four-stranded HT autograft diameter in ACL reconstruction. Multiple linear regression analysis indicated that the combination of MRI CSA measurement, weight, and height is the strongest predictor.

The Effect of Reconstruction of the Medial Patellofemoral Ligament on Patellar Tracking

2000 ◽  
Vol 28 (3) ◽  
pp. 345-349 ◽  
Author(s):  
Robert H. Sandmeier ◽  
Robert T. Burks ◽  
Kent N. Bachus ◽  
Annette Billings
Keyword(s):  
Medial Patellofemoral Ligament ◽  
Testing Machine ◽  
Lateral Force ◽  
Tendon Graft ◽  
Patellar Tracking ◽  
Materials Testing ◽  
Gracilis Tendon ◽  
Position Sensing ◽  
Sensing System ◽  
Gracilis Tendon Graft

We evaluated patellar tracking in six cadaveric knees with the medial restraints intact and then sectioned to determine their contribution to lateral translation of the patella with and without a lateral force on the patella. The medial patellofemoral ligament was then reconstructed with a gracilis tendon graft and patellar tracking was again evaluated. The knees were extended using a materials testing machine, and patellar tracking was measured with a position sensing system. With no lateral force applied to the patella, patellar tracking was unaffected by the presence or absence of the medial restraints or by reconstruction of the medial patellofemoral ligament. With a lateral force applied to the patella, patellar tracking was changed significantly by the loss of the medial restraints. Normal patellar tracking was substantially restored by reconstruction of the medial patellofemoral ligament.

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