scholarly journals In situ force in the anterior cruciate ligament, the lateral collateral ligament, and the anterolateral capsule complex during a simulated pivot shift test

2017 ◽  
Author(s):  
Kevin M. Bell ◽  
Ata A. Rahnemai-Azar ◽  
Sebastian Irarrazaval ◽  
Daniel Guenther ◽  
Freddie H. Fu ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Pivot Shift ◽  
Cruciate Ligament ◽  
Lateral Collateral Ligament ◽  
Pivot Shift Test ◽  
Collateral Ligament ◽  
In Situ Force ◽  
Anterolateral Capsule ◽  
Anterior Cruciate

scholarly journals Imaging Findings of Knee Trauma on Magnetic Resonance Imaging

2022 ◽  
Vol 8 (1) ◽  
pp. 12-23
Author(s):  
Poonam Ohri ◽  
Shreeji Goya ◽  
Niveditha C ◽  
Manasi Kohli
Keyword(s):  
Anterior Cruciate Ligament ◽  
Imaging Modality ◽  
Cruciate Ligament ◽  
Age Groups ◽  
Lateral Collateral Ligament ◽  
Cost Effective ◽  
Collateral Ligament ◽  
Imaging Evaluation ◽  
Young Males ◽  
Anterior Cruciate

Background: Knee is one of the major joints involved in kinesis. With increasing involvement in sports related activities especially in young people, Trauma related knee pathologies have increased. An accurate diagnosis regarding the type and extent of injuries is essential for early operative as well as non-operative treatment. Methods:This prospective study included total of 82 cases. The patients were referred to the department of Radiodiagnosis from indoor and outdoor departments of Guru Nanak Dev Hospital, Amritsar with suspicion of internal derangement of the knee and with history of knee trauma.Results:The most common age group involved was young males between 15-34 years. In all age groups most of the patients were males. Most common ligament to be injured was Anterior Cruciate Ligament (ACL). Partial tears were more common than complete tears. Posterior Cruciate Ligament (PCL) tears were less common. Medial Collateral Ligament (MCL) tears outnumbered Lateral Collateral Ligament (LCL) tears and grade 2 tears were more common in both. Among the meniscal injuries Medial Meniscus (MM) tears were more common than LM and grade 3 signal was more common in both. Most of the patellar retinaculum injuries were associated with Anterior Cruciate Ligament ACL tears.Conclusions:Post-traumatic pre-arthroscopic MR imaging evaluation has proved to be cost-effective. MRI is an accurate imaging modality complementing the clinical evaluation and providing a global intra-articular and extra-articular assessment of the knee.

Radiological Identification of Injury to the Kaplan Fibers of the Iliotibial Band in Association With Anterior Cruciate Ligament Injury

2020 ◽  
Vol 48 (9) ◽  
pp. 2213-2220
Author(s):  
Lachlan M. Batty ◽  
Jerome Murgier ◽  
Julian A. Feller ◽  
Richard O’Sullivan ◽  
Kate E. Webster ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Lateral Collateral Ligament ◽  
Acl Injury ◽  
Iliotibial Band ◽  
Time Interval ◽  
Collateral Ligament ◽  
Tibial Bone ◽  
Mri Scans ◽  
Anterior Cruciate

Background: Recent biomechanical studies have demonstrated that the Kaplan fibers (KFs) of the iliotibial band play a role in the control of anterolateral rotation of the knee. However, controversy exists regarding whether the KFs are injured in conjunction with anterior cruciate ligament (ACL) injury. Purpose: To establish the prevalence of radiological injury to the KFs in the ACL-injured knee; to evaluate the effect of the time interval between injury and magnetic resonance imaging (MRI) on diagnosis of KF injury; and to assess for any association between KF injury and other qualitative radiological findings. Study Design: Cohort study (diagnosis); Level of evidence, 3. Methods: Preoperative MRI scans were reviewed for 161 patients with ACL injury. Specific diagnostic criteria were developed and applied to identify KF injury. Chi-square testing was performed to look for associations among KF injury, the time from injury to MRI, and associated radiological knee injuries. Results: Radiological evidence of KF injury was identified in 30 (18.6%) patients. The diagnosis of KF injury was higher in patients who had MRI scans performed within 90 days of injury as compared with ≥90 days after injury (23.7 vs 6.4%; P = .010). Patients with an MRI diagnosis of KF injury had significantly higher rates of lateral meniscal injury (40% vs 18%; P = .007), posteromedial tibial bone marrow edema (73% vs 44%; P = .003), and injury to the lateral collateral ligament (13% vs 3%; P = .019) or medial collateral ligament (23% vs 8%; P = .019). Conclusion: The prevalence of injury to the KF in patients with ACL injury as diagnosed by MRI was relatively low (18.6% of patients). However, the time interval from injury to MRI was relevant to diagnosis, with significantly higher rates of injury identification in patients with early (within 90 days) versus delayed (≥90 days) MRI. KF injury was associated with higher rates of injury to the lateral meniscal and collateral ligaments, as well as posteromedial tibial bone bruising.

Augmentation of Anatomic Anterior Cruciate Ligament Reconstruction With Lateral Extra-articular Tenodesis Does Not Significantly Affect Rotatory Knee Laxity: A Time Zero, In Vivo Kinematic Analysis

2020 ◽  
Vol 48 (14) ◽  
pp. 3495-3502
Author(s):  
Andrew J. Sheean ◽  
Jayson Lian ◽  
Robert Tisherman ◽  
Sean J. Meredith ◽  
Darren de SA ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Pivot Shift ◽  
Cruciate Ligament ◽  
Knee Laxity ◽  
Lateral Compartment ◽  
Categorical Variables ◽  
Pivot Shift Test ◽  
Contralateral Knee ◽  
Rotatory Knee Laxity ◽  
Anterior Cruciate

Background: The pivot-shift test is used to assess for rotatory knee laxity in the anterior cruciate ligament (ACL)-deficient knee and ACL-reconstructed knee; however, the pivot shift uses a subjective grading system that is limited by variability between examiners. Consequently, quantified pivot shift (QPS) test software (PIVOT iPad application) has been developed and validated to measure the magnitude of rotatory knee laxity during the positive pivot-shift test. Purpose: To employ intraoperative QPS (iQPS) to assess for differences in residual rotatory knee laxity after ACL reconstruction (ACLR) versus ACLR augmented with lateral extra-articular tenodesis (ACLR + LET), and to employ iQPS to determine if ACLR and/or ACLR + LET result in overconstrained knee kinematics when compared with the contralateral knee. Study Design: Cohort study; Level of evidence, 2. Methods: iQPS was performed in 20 patients by a single surgeon on both the operative and contralateral knees before ACLR. ACLR was augmented with a LET if the lateral compartment tibial translation measured during QPS was greater than or equal to double the amount of lateral tibial compartment translation measured for the contralateral knee. After each reconstruction (ACLR or ACLR + LET), iQPS measurements were performed. iQPS data were compared with the preoperative QPS measurements of the operative and contralateral knees. Postoperative iQPS data were compared with both the preoperative QPS measurements of the operative and contralateral knees with paired samples t tests. Categorical variables were compared using the Fisher exact test. Results: The mean age in the cohort was 17.3 years (range, 15-24 years). There were no significant differences between the groups in terms of the proportion of male patients (ACLR: 5 male, 5 female vs ACLR + LET: 4 male, 6 female) or age (ACLR: 17.7 ± 3.3 years; 95% CI, 15.4-24.0 vs ACLR + LET: 16.8 ± 2.8 years, 95% CI, 14.8-22.0; P = .999). There were no significant differences between the groups with respect to preoperative QPS performed during examination under anesthesia (ACLR: 4.7 ± 2.0 mm; 95% CI, 3.3-6.1 vs ACLR + LET: 3.6 ± 1.8 mm; 95% CI, 2.3-4.9; P = .2). Both ACLR and ACLR + LET resulted in significant decreases in rotatory knee laxity when compared with preoperative QPS measurements (ACLR: –3.4 ± 1.7 mm; 95% CI, −4.6 to −2.2; P < .001: ACLR + LET: –2.6 ± 1.9 mm; 95% CI, −3.9 to −1.3; P < .002). Moreover, when compared with isolated ACLR, ACLR + LET did not result in a significantly smaller magnitude of change in iQPS between the pre- and postoperative states ( P = .3). Conclusion: Both ACLR and ACLR + LET resulted in significant decreases in rotatory knee laxity. The augmentation of ACLR with LET did not change the constraint of the knee with respect to lateral compartment translation as measured during iQPS.

scholarly journals MRI-determined anterolateral capsule injury did not affect the pivot-shift in anterior cruciate ligament-injured knees

2019 ◽  
Vol 27 (11) ◽  
pp. 3426-3431 ◽  
Author(s):  
Nobuaki Miyaji ◽  
Yuichi Hoshino ◽  
Toshikazu Tanaka ◽  
Kyohei Nishida ◽  
Daisuke Araki ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Pivot Shift ◽  
Cruciate Ligament ◽  
Anterolateral Capsule ◽  
Anterior Cruciate
Sign in / Sign up

Export Citation Format

Share Document