Context: Knee joint effusion and quadriceps strength and activation deficits are common consequences of anterior cruciate ligament (ACL) injury and reconstruction. The presence of an effusion may initiate or worsen the quadriceps dysfunction present after ACL trauma. In simulated effusion studies, evidence indicates an inverse relationship between effusion size and quadriceps dysfunction. While this relationship was not found in patients after ACL injury, prior research was limited by a subjective clinical assessment of effusion grade.
Objective: The purpose of this study was to determine if the size of the knee joint effusion, measured via ultrasound, after ACL injury and reconstruction influences quadriceps strength and activation.
Design: Descriptive Laboratory Study.
Setting: Research Laboratory.
Patients Or Other Participants: 41 individuals (23 females, age=21.8±7.5years, height =171.7±7.9cm, 15 mass =72.3±14.2kg), with an ACL injury reported for 2 sessions [one before 16 reconstruction and one ∽16 weeks after ACL reconstruction].
Main Outcome Measure: Three ultrasound images of the suprapatellar pouch and three trials of quadriceps strength and activation using the interpolated twitch technique were gathered from the ACL knee. Effusion cross-sectional area was measured using ImageJ, averaged and inputted into linear regression models to predict muscle strength and interpolated twitch activation. Analyses were considered significant at p≤0.05.
Results: No relationship was found between effusion size and strength (R2 = 0.086) or activation (R2=0.056) after ACL injury (p>0.05). After reconstruction, however, there was a small negative relationship between effusion size 24 and activation (R2=0.122; Standardized β=-0.349; p=0.025), while no relationship was found for effusion size and strength (R2=0.000; p≤0.05).
Conclusions: The size of the effusion after ACL injury does not influence strength or activation. However, after ACL reconstruction, effusion size does have a small influence on quadriceps activation, with a larger effusion being related to lower activation. Prior research using simulated effusions appear to overestimate the effects of effusion on quadriceps function.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.4085/1062-6050-0294.24 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Patients with anterior cruciate ligament reconstruction frequently present asymmetries in the sagittal plane dynamics when performing single leg jumps but their assessment is inaccessible to health-care professionals as it requires a complex and expensive system. With the development of deep learning methods for human pose detection, kinematics can be quantified based on a video and this study aimed to investigate whether a relatively simple 2D multibody model could predict relevant dynamic biomarkers based on the kinematics using inverse dynamics. Six participants performed ten vertical and forward single leg hops while the kinematics and the ground reaction force "GRF" were captured using an optoelectronic system coupled with a force platform.
View Article and Find Full Text PDFMany options are available concerning the graft fixation in ACL reconstruction, one of them being a suspensory device. Our study aimed to compare the strength of two different devices of fixation (suspensory device vs screw) on the tibia. We enrolled 80 patients older than 18 years with an isolated ACL tear confirmed at the MRI, divided into two comparative groups for a prospective study.
View Article and Find Full Text PDFTo (1) establish a women's knee health consumer advisory group (CAG) via an evidence-informed process and (2) identify the CAG's research priorities to inform future projects. Mixed-methods priority-setting study. The CAG was established, grounded in a participatory action research approach and using the Patient Engagement in Research Framework, to inform a 4-phase process: (1) understand, (2) plan, (3) undertake, and (4) evaluate.
View Article and Find Full Text PDFKnee Ligament Injuries in the National Football League: Impact of Field Surface Type During the 2020-2023 Seasons.
Cureus
December 2024
Orthopedic Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, USA.
Introduction A subject of ongoing debate within the National Football League (NFL) community revolves around the comparative risk of anterior cruciate ligament (ACL) injuries on natural versus artificial turf field surfaces. There have been mixed results as to whether there is a difference in injury rates depending on the playing surface and what factors might play a role in affecting these rates. Methods This study aims to compare the incidence of in-game knee ligament tears in the NFL during the 2020-2023 seasons.
View Article and Find Full Text PDFRelationship Between Quadriceps Strength at 6 Months Postoperatively and Improvement in Patient-Reported Knee Function After Anterior Cruciate Ligament Reconstruction.
Orthop J Sports Med
January 2025
Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Background: Understanding the factors associated with poor recovery over time after anterior cruciate ligament reconstruction (ACLR) helps clinicians identify patients who are at risk and targets for an intervention.
Purpose: To determine the factors associated with improvement in subjective knee function from 6 to 12 months after ACLR.
Study Design: Case-control study; Level of evidence, 3.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!