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https://www.readbyqxmd.com/read/28324130/the-oblique-popliteal-ligament-an-anatomic-and-mri-investigation
#1
Mandy Hedderwick, Mark D Stringer, Liam McRedmond, Grant R Meikle, Stephanie J Woodley
PURPOSE: Despite being the largest ligament on the posterior aspect of the knee, relatively little is known about the normal morphology of the oblique popliteal ligament (OPL). The aim of this study was to investigate the detailed anatomy of the OPL in cadavers and healthy volunteers. METHODS: The posterior knee was investigated in 25 cadaver lower limbs (mean age 76 ± 9.5 years; 7 men) by dissection, histology, and serial plastination and in 14 healthy individuals (mean age 23 ± 3...
March 21, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28321475/the-forgotten-joint-quantifying-the-anatomy-of-the-proximal-tibiofibular-joint
#2
Jack Anavian, Daniel Cole Marchetti, Gilbert Moatshe, Erik L Slette, Jorge Chahla, Alex W Brady, David M Civitarese, Robert F LaPrade
PURPOSE: Limited objective data exist detailing the quantitative anatomy of the individual bundles of the proximal tibiofibular joint and their relation to surgically pertinent osseous landmarks. The purpose of this study was to qualitatively and quantitatively describe the ligamentous anatomy of the proximal tibiofibular joint and its relation to relevant bony landmarks. METHODS: Ten non-paired, fresh-frozen cadaveric knee specimens were dissected to identify the proximal tibiofibular joint ligament bundles...
March 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28320209/anterolateral-ligament-of-the-knee-anatomy-function-imaging-and-treatment
#3
Ronak M Patel, Robert H Brophy
The anterolateral ligament (ALL) of the knee has gained attention recently for its potential role in rotational stability of the knee, especially in association with anterior cruciate ligament (ACL) injuries. Anatomic studies have characterized the ALL as it runs in an anteroinferior and oblique direction from the lateral distal femur to the anterolateral proximal tibia, although the prevalence and variance of this ligament are not well understood. Magnetic resonance imaging and ultrasound have identified the ligament and linked it with the classically described Segond fracture...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28316309/high-resolution-ct-angiogram-for-lower-extremity-vein-mapping
#4
Mark P Wright, Matthew R Smeds, Lonnie Wright, Ahsan T Ali
High-resolution CT angiogram (CTA) has replaced traditional diagnostic angiography as the main preoperative imaging modality for vascular surgery patients. Although the use of CTA is increasing for arterial imaging, it has not been used routinely for vein mapping. The goal of this study was to evaluate the accuracy of CTA for venous anatomy and compare it to a standard venous duplex ultrasound (DUS). When the vein was used for bypass, the quality and size of the vein were evaluated in the operating room. As part of a preoperative workup before lower extremity revascularization, 16 patients underwent a CTA followed by a DUS...
March 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28302462/the-impact-of-mechanical-and-restricted-kinematic-alignment-on-knee-anatomy-in-total-knee-arthroplasty
#5
Abdulaziz M Almaawi, Jonathan R B Hutt, Vincent Masse, Martin Lavigne, Pascal-Andre Vendittoli
BACKGROUND: Total knee arthroplasty (TKA), aiming at neutral mechanical alignment (MA), inevitably modifies the patient's native knee anatomy. Another option is kinematic alignment (KA), which aims to restore the original anatomy of the knee. The aim of this study was to evaluate the variations in lower limb anatomy of a patient population scheduled for TKA, and to assess the use of a restricted KA TKA protocol and compare the resulting anatomic modifications with the standard MA technique...
February 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28302318/regional-differences-of-tibial-and-femoral-cartilage-in-the-chondrocyte-gene-expression-immunhistochemistry-and-composite-in-different-stages-of-osteoarthritis
#6
A Lahm, D Dabravolski, H Spank, H Merk, J Esser, R Kasch
The function of articular cartilage as an avascular tissue is mainly served by collagen type II and proteoglycan molecules. Within this matrix homeostasis between production and breakdown of the matrix is exceptionally sensitive. The current study was conducted to identify regional differences in specific alterations in cartilage composition during the osteoarthritic process of the human knee joint. Therefor the changes in the expression of the key molecules of the extracellular matrix were measured in dependence of the anatomical side (femoral vs tibial) and associated with immunohistochemistry and quantitative measurement...
February 24, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28291144/physical-examination-of-knee-ligament-injuries
#7
Robert D Bronstein, Joseph C Schaffer
The knee is one of the most commonly injured joints in the body. A thorough history and physical examination of the knee facilitates accurate diagnosis of ligament injury. Several examination techniques for the knee ligaments that were developed before advanced imaging remain as accurate or more accurate than these newer imaging modalities. Proper use of these examination techniques requires an understanding of the anatomy and pathophysiology of knee ligament injuries. Advanced imaging can be used to augment a history and examination when necessary, but should not replace a thorough history and physical examination...
April 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28290240/popliteal-cyst-before-william-baker-first-report-in-the-galenic-corpus
#8
Marios Papadakis, Andreas Manios, Constantinos Trompoukis
INTRODUCTION: A popliteal cyst, also known as Baker cyst, is a benign fluctuant swelling of the gastrocnemius-semimembranosus bursa in the popliteal fossa at the back of the knee. The cyst is named after William Morrant Baker, who is considered to have first described this fluid collection with new sac formation outside of the knee-joint in 1877. We herein present a short description contained in the Galenic Corpus that appears to match to what we now call the Baker cyst. MATERIAL AND METHODS: Α thorough survey of Kühn's Galenic Corpus was performed...
April 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28286916/contributions-of-the-anterolateral-complex-and-the-anterolateral-ligament-to-rotatory-knee-stability-in-the-setting-of-acl-injury-a-roundtable-discussion
#9
REVIEW
Volker Musahl, Alan Getgood, Philippe Neyret, Steven Claes, J M Burnham, Cecile Batailler, Bertrand Sonnery-Cottet, Andy Williams, Andrew Amis, Stefano Zaffagnini, Jón Karlsson
Persistent rotatory knee laxity is increasingly recognized as a common finding after anterior cruciate ligament (ACL) reconstruction. While the reasons behind rotator knee laxity are multifactorial, the impact of the anterolateral knee structures is significant. As such, substantial focus has been directed toward better understanding these structures, including their anatomy, biomechanics, in vivo function, injury patterns, and the ideal procedures with which to address any rotatory knee laxity that results from damage to these structures...
March 12, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28280738/ultrasound-guided-obturator-nerve-block-a-focused-review-on-anatomy-and-updated-techniques
#10
REVIEW
Takayuki Yoshida, Tatsuo Nakamoto, Takahiko Kamibayashi
This review outlines the anatomy of the obturator nerve and the indications for obturator nerve block (ONB). Ultrasound-guided ONB techniques and unresolved issues regarding these procedures are also discussed. An ONB is performed to prevent thigh adductor jerk during transurethral resection of bladder tumor, provide analgesia for knee surgery, treat hip pain, and improve persistent hip adductor spasticity. Various ultrasound-guided ONB techniques can be used and can be classified according to whether the approach is distal or proximal...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28261847/improved-field-mapping-and-artifact-correction-in-multispectral-imaging
#11
Brady Quist, Xinwei Shi, Hans Weber, Brian A Hargreaves
PURPOSE: To develop a method for improved B0 field-map estimation, deblurring, and image combination for multispectral imaging near metal. METHODS: A goodness-of-fit field-map estimation technique is proposed that uses only the multispectral imaging (MSI) data to estimate the field map. Using the improved field map, a novel deblurring technique is proposed that also employs a new image combination scheme to reduce the effects of noise and other residual MSI artifacts...
March 5, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28259348/editorial-commentary-studying-the-anterolateral-ligament-of-the-knee-have-we-lost-track-of-our-main-focus
#12
EDITORIAL
Bertrand Sonnery-Cottet
Considerable recent debate has led to a greater understanding of the potential role of the anterolateral structures of the knee in improving the outcomes of anterior cruciate ligament reconstruction. Although cadaveric studies have made a very important contribution to our understanding of anatomy, their weakness lies in a difficulty in knowing whether extrapolating biomechanical findings from a laboratory study to the clinical scenario can be valid.
March 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28251769/comparison-of-reaction-forces-on-the-anterior-cruciate-and-anterolateral-ligaments-during-internal-rotation-and-anterior-drawer-forces-at-different-flexion-angles-of-the-knee-joint
#13
Levent Uğur
BACKGROUND: Having a complicated anatomy, the knee joint has been further detailed and a new formation defined, the anterolateral ligament (ALL), in recent studies. While the importance of this ligament, which previously was associated with Segond fractures, was explained via clinical, radiologic and biomechanical studies, and basically, is thought to be a fixator structures for the tibia against internal rotation stress. Although in recent studies efficient surgical treatment was applied to patients who underwent anterior cruciate ligament (ACL) operation, some patients having a positive pivot test highlights the clinical importance of the ALL...
March 2, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28251062/failed-medial-patellofemoral-ligament-reconstruction-causes-and-surgical-strategies
#14
REVIEW
Vicente Sanchis-Alfonso, Erik Montesinos-Berry, Cristina Ramirez-Fuentes, Joan Leal-Blanquet, Pablo E Gelber, Joan Carles Monllau
Patellar instability is a common clinical problem encountered by orthopedic surgeons specializing in the knee. For patients with chronic lateral patellar instability, the standard surgical approach is to stabilize the patella through a medial patellofemoral ligament (MPFL) reconstruction. Foreseeably, an increasing number of revision surgeries of the reconstructed MPFL will be seen in upcoming years. In this paper, the causes of failed MPFL reconstruction are analyzed: (1) incorrect surgical indication or inappropriate surgical technique/patient selection; (2) a technical error; and (3) an incorrect assessment of the concomitant risk factors for instability...
February 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28247330/corr-insights-%C3%A2-anterolateral-ligament-of-the-knee-shows-variable-anatomy-in-pediatric-specimens
#15
John P Albright
No abstract text is available yet for this article.
February 28, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28238018/the-iliotibial-tract-imaging-anatomy-injuries-and-other-pathology
#16
REVIEW
Russell Flato, Giovanni J Passanante, Matthew R Skalski, Dakshesh B Patel, Eric A White, George R Matcuk
The iliotibial tract, also known as Maissiat's band or the iliotibial band, and its associated muscles function to extend, abduct, and laterally rotate the hip, as well as aid in the stabilization of the knee. A select group of associated injuries and pathologies of the iliotibial tract are seen as sequela of repetitive stress and direct trauma. This article intends to educate the radiologist, orthopedist, and other clinicians about iliotibial tract anatomy and function and the clinical presentation, pathophysiology, and imaging findings of associated pathologies...
May 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28220268/anterolateral-ligament-expert-group-consensus-paper-on-the-management-of-internal-rotation-and-instability-of-the-anterior-cruciate-ligament-deficient-knee
#17
REVIEW
Bertrand Sonnery-Cottet, Matthew Daggett, Jean-Marie Fayard, Andrea Ferretti, Camilo Partezani Helito, Martin Lind, Edoardo Monaco, Vitor Barion Castro de Pádua, Mathieu Thaunat, Adrian Wilson, Stefano Zaffagnini, Jacco Zijl, Steven Claes
Purpose of this paper is to provide an overview of the latest research on the anterolateral ligament (ALL) and present the consensus of the ALL Expert Group on the anatomy, radiographic landmarks, biomechanics, clinical and radiographic diagnosis, lesion classification, surgical technique and clinical outcomes. A consensus on controversial subjects surrounding the ALL and anterolateral knee instability has been established based on the opinion of experts, the latest publications on the subject and an exchange of experiences during the ALL Experts Meeting (November 2015, Lyon, France)...
February 20, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28217572/arthroscopic-patterns-of-the-poster-medial-aspect-of-the-knee-joint-classification-of-the-gastrocnemius-semimembranosus-gateway-and-its-relationship-with-baker-s-cyst
#18
Vittorio Calvisi, Carmine Zoccali
BACKGROUND: The gastrocnemius-semimembranosus bursa may communicate with the knee joint. The arthroscopic anatomy of the posteromedial aspect varies depending on the angle of the oblique popliteal ligament, the level at which it crosses the medial gastrocnemius tendon, and its relationship with the capsular joint and synovia. The aim of this paper is to identify possible patterns, and to evaluate their characteristics and their relationship with Baker's cyst. METHODS: data archived from 185 consecutive arthroscopies were evaluated; an anatomic description and classification was carried out; the percentages of association with BC and the associated pathologies were reported...
October 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28211591/magnetic-resonance-imaging-of-the-knee-an-overview-and-update-of-conventional-and-state-of-the-art-imaging
#19
Nicholas C Nacey, Matthew G Geeslin, Grady Wilson Miller, Jennifer L Pierce
Magnetic resonance imaging (MRI) has become the preferred modality for imaging the knee to show pathology and guide patient management and treatment. The knee is one of the most frequently injured joints, and knee pain is a pervasive difficulty that can affect all age groups. Due to the diverse pathology, complex anatomy, and a myriad of injury mechanisms of the knee, the MRI knee protocol and sequences should ensure detection of both soft tissue and osseous structures in detail and with accuracy. The knowledge of knee anatomy and the normal or injured MRI appearance of these key structures are critical for precise diagnosis...
February 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28196619/development-and-verification-of-novel-porous-titanium-metaphyseal-cones-for-revision-total-knee-arthroplasty
#20
Ahmad Faizan, Manoshi Bhowmik-Stoker, Amanda E Kirk, Viktor E Krebs, Steven F Harwin, R Michael Meneghini
BACKGROUND: Porous metaphyseal cones are widely used in revision knee arthroplasty. A new system of porous titanium metaphyseal cones has been designed based on the femoral and tibial morphology derived from a computed tomography-based anatomical database. The purpose of this study is to evaluate the initial mechanical stability of the new porous titanium revision cone system by measuring the micromotion under physiologic loading compared with a widely-used existing porous tantalum metaphyseal cone system...
January 18, 2017: Journal of Arthroplasty
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