AOC Research & Innovation
Our doctors are shaping the future of orthopedics through research and publications that guide the advanced care we provide every day.
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Midterm survival of cementless total knee arthroplasty with a three-dimensional printed metal-backed patellar component from the American Joint Replacement Registry
Author Dr. Ormonde Mahoney, et al. Journal Journal of Orthopaedics, Volume 69 Summary This study found that 3D-printed metal-backed patellar components in cementless knee replacements had lower revision rates than other cementless designs and comparable durability to cemented components in patients over 65, suggesting the 3D-printed design is a reliable option for total knee arthroplasty.
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Body Habitus Impact on Success of Cryoneurolysis for Postoperative Total Knee Arthroplasty Pain Control: A Retrospective Cohort Study
Author Dr. Clayton W Wing, et al. Journal Arthroplasty Today, Volume 22 Summary This study examined whether body habitus affects the effectiveness of cryoneurolysis, a temporary nerve-freezing technique, for managing pain after total knee arthroplasty. Researchers reviewed outcomes for patients of different body sizes and found that cryoneurolysis provided consistent pain relief, reduced opioid use,…
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Posterior Compartment Debridement and Varus Deformity Correction in Total Knee Arthroplasty
Author Dr. Ormonde Mahoney, et al. Journal The Journal of Arthroplasty, Volume 38 – Issue 6 Summary This study investigates the impact of posterior osteophytes on alignment correction during total knee arthroplasty (TKA). Using imaging and robotic-assisted measurements, it quantifies osteophyte volume and examines how their removal influences joint-line restoration and deformity correction, offering insights…
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Effectiveness of Amniotic Fluid Injection in the Treatment of Trigger Finger
Author Dr. Michael S Shuler, et al. Journal Journal of Hand Surgery, Volume 2 – Issue 5 Summary This study explores the use of amniotic fluid injections for mild to moderate trigger finger. Results showed reduced pain, decreased triggering, and improved function in about half of treated digits, including patients with diabetes, suggesting amniotic injections…
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Patient-Reported Functional and Satisfaction Outcomes after Robotic-Arm-Assisted Total Knee Arthroplasty: Early Results of a Prospective Multicenter Investigation
Author Dr. Ormonde Mahoney, et al. Journal The Journal of Knee Surgery Summary This study compares early outcomes following robotic-arm-assisted versus manual total knee arthroplasty, assessing patient-reported symptoms, satisfaction, expectations, and functional activities over a three-month period. Using standardized scoring systems, it evaluates differences in recovery progress between the two surgical methods, providing insights into…
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Suture Button Suspensionplasty in the Treatment of Carpometacarpal Arthritis: A Retrospective Analysis of One Surgeon’s Experience Over 9 Years
Author Dr. Michael S Shuler, et al. Journal Journal of Hand Surgery Global Online, Volume 2 – Issue 1 Summary This retrospective study reviewed 242 trapeziectomy with suture button suspensionplasty (SBS) procedures for thumb CMC arthritis performed by a single surgeon, with an average 35-month follow-up. Patients showed excellent outcomes, with an average postoperative DASH…
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Continual near-infrared spectroscopy monitoring in the injured lower limb and acute compartment syndrome
Author Dr. Michael S Shuler, et al. Journal The Bone and Joint Journal, Volume 100-B No.6 Summary This study evaluated near-infrared spectroscopy (NIRS) as a non-invasive way to monitor acute compartment syndrome (ACS) in patients with severe leg injuries. Researchers found that NIRS detected decreases in oxygenation in compartments affected by ACS, while injured compartments…
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Balanced Flexion and Extension Gaps Are Not Always of Equal Size
Author Dr. Ormonde Mahoney, et al. Journal The Journal of Arthroplasty, Volume 33 – Issue 4 Summary This study looked at how the knee moves during total knee replacement surgery and how that movement can affect surgical measurements. Researchers found that when the knee is bent and tested for balance during surgery, the shinbone (tibia)…
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Use of Near-Infrared Spectroscopy to Detect Sustained Hyperaemia Following Lower Extremity Trauma
Author Dr. Michael S Shuler, et al. Journal Military Medicine, Volume 181 – Issue 2 Summary This study assessed near-infrared spectroscopy (NIRS) for monitoring acute compartment syndrome (ACS) after lower extremity fractures. Researchers found that oxygenation levels in injured compartments remained elevated 48 hours after surgical stabilization, reflecting a sustained hyperaemic response. These findings suggest…
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Subcutaneous depth in a traumatized lower extremity
Author Dr. Michael S Shuler, et al. Journal Journal of Trauma and Acute Care Surgery, Volume 7 Summary This study measured the thickness of subcutaneous tissue over the posterior leg muscles in patients with tibia fractures to assess whether swelling or obesity might affect near-infrared spectroscopy (NIRS) readings. Researchers found that tissue depth rarely exceeded…
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Correlation of near-infrared spectroscopy and direct pressure monitoring in an acute porcine compartmental syndrome model
Author Dr. Michael S Shuler, et al. Journal Journal of Orthopaedic Trauma, Volume 8 – Issue 6 Summary This study evaluated near-infrared spectroscopy (NIRS) as a way to monitor tissue oxygenation in an acute limb compartment syndrome model in pigs. Researchers found that NIRS closely tracked changes in tibial intracompartmental pressures and perfusion, detecting decreases…
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Near Infrared Spectroscopy and Lower Extremity Acute CompartmentSyndrome: A Review of the Literature
Author Dr. Michael S Shuler, et al. Journal Journal of Trauma & Treatment Summary This article explains that near-infrared spectroscopy (NIRS) noninvasively measures tissue oxygenation 2–3 cm below the skin, making it useful for continuous monitoring of regional perfusion. Its ability to detect localized hypoperfusion makes NIRS a promising tool for diagnosing acute compartment syndrome.
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Knee Moments After Unicompartmental Knee Arthroplasty During Stair Ascent
Author Dr. Ormonde Mahoney, et al. Journal Clinical Orthopaedics and Related Research, Volume 472 – Issue 1 Summary This study examines knee joint moments during stair ascent in patients with unicompartmental knee arthroplasty (UKA), comparing the operated limb to the nondiseased contralateral limb. It analyzes differences in knee kinetics for patients with medial and lateral UKAs and…
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Identification of Optimal ControlCompartments for Serial Near-InfraredSpectroscopy Assessment of LowerExtremity Compartmental Perfusion
Author Dr. Michael S Shuler, et al. Journal Journal of Surgical Orthopaedic Advances, Volume 22 – Number 1 Summary This study explores the use of near-infrared spectroscopy (NIRS) in detecting ischemic changes for acute compartment syndrome. Researchers found strong correlations between contralateral leg compartments and identified the volar forearm as the best upper-extremity control site.…
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Relationship between near infrared spectroscopy and intra-compartmental pressures
Author Dr. Michael S Shuler, et al. Journal The Journal of Emergency Medicine, Vol. 44, No. 2 Summary This study evaluated near-infrared spectroscopy (NIRS) as a non-invasive method to monitor blood flow in an acute compartment syndrome (ACS) model. Researchers found that NIRS readings decreased in response to lowering perfusion pressures, suggesting it could be…
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What’s New in Acute Compartment Syndrome?
Author Dr. Michael S Shuler, et al. Journal Journal of Orthopaedic Trauma, Volume 26 – Issue 12 Summary This review explores recent advances in understanding and managing acute compartment syndrome (ACS). It highlights that ACS is often caused by tissue swelling or reperfusion rather than just fluid accumulation and emphasizes the risks of delayed diagnosis.…
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Compartment Syndrome of the Upper Arm and Forearm
Author Dr. Michael S Shuler, et al. Journal Techniques in Orthopaedics, Volume 27 Summary This study explores upper extremity compartment syndrome, emphasizing the importance of prompt diagnosis and complete decompression. Understanding common compartments, subcompartments, and anatomic variations is critical for effective management and successful patient outcomes.
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Near-infrared Spectroscopy Monitoring for Compartment Syndrome
Author Dr. Michael S Shuler, et al. Journal Techniques in Orthopaedics, Volume 27 – Issue 1 Summary This study reviews near-infrared spectroscopy (NIRS) technology, which estimates tissue oxygenation by measuring oxyhemoglobin and deoxyhemoglobin levels. It highlights NIRS applications for monitoring muscle oxygenation in acute and chronic compartment syndrome and provides guidance on proper sensor placement,…
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Ability of near infrared spectroscopy to measure oxygenation in isolated upper extremity muscle compartments
Author Dr. Michael S Shuler, et al. Journal The Journal of Hand Surgery, Volume 37 – Issue 2 Summary This study tested near-infrared spectroscopy (NIRS) for monitoring muscle oxygenation in specific forearm compartments during exercise. Researchers found that NIRS values decreased in the actively contracting muscles while resting compartments remained unchanged, demonstrating that NIRS can…
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Near-infrared spectroscopy in acute compartment syndrome
Author Dr. Michael S Shuler, et al. Journal Injury-international Journal of The Care of The Injured, Volume 42 – Issue 12 Summary This study explores a 44-year-old male with a proximal tibia fracture treated with external fixation who developed postoperative hypersensitivity in both legs. Measurements of intramuscular pressures in all compartments of the injured leg…
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Near-infrared spectroscopy in lower extremity trauma
Author Dr. Michael S Shuler, et al. Journal The Journal of Bone & Joint Surgery, Volume 9 – Issue 6 Summary This study explores how near-infrared spectroscopy (NIRS) measures tissue oxygenation after tibial fractures. Researchers found that injured legs showed a consistent increase in oxygenation compared with uninjured legs, and the contralateral limb served effectively…
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Tunnel Convergence in Combined Anterior Cruciate Ligament and Posterolateral Corner Reconstruction
Author Dr. Michael S Shuler, et al. Journal Arthroscopy Journal, Volume 22 – Issue 2 Summary This study examined how different tunnel angles and depths in the lateral femoral condyle affect tunnel collision risk during combined ACL and posterolateral corner reconstruction. Results showed that deeper (30 mm) tunnels and larger axial or coronal angles significantly…
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Risk Factors for Pulmonary Emboli after Total Hip or Knee Arthroplasty
Author Dr. Michael S Shuler, et al. Journal Clinical Orthopaedics and Related Research, Volume 422 Summary This study explores risk factors for pulmonary embolism after total hip or knee arthroplasty. Researchers found that abnormalities in plasminogen activator inhibitor activity, dilute Russell’s viper venom time, prothrombin time, and cholesterol levels were highly predictive of pulmonary embolism,…
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Evaluation of the Validity of the AOFAS Clinical Rating Systems by Correlation to the SF-36
Author Dr. Michael S Shuler, et al. Journal American Orthopaedic Foot & Ankle Society, Volume 100 Summary This study assessed how well the AOFAS Clinical Rating Systems align with the validated SF-36 outcomes measure in 91 patients with foot and ankle conditions. Correlations between the two tools were generally low—ranging from 0.02 to 0.36 overall…