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https://www.readbyqxmd.com/read/28425611/a-simple-assessment-tool-for-evaluation-of-cadaveric-temporal-bone-dissection
#1
Sarah E Mowry, Erika Woodson, Samuel Gubbels, Matt Carfrae, Marlan R Hansen
EDUCATIONAL OBJECTIVE: Objective metrics in skilled-based educational courses allow trainees and instructors to assess performance and monitor progress. The objective is to validate a concise, easy-to-use instrument for assessment of resident skill during a timed cadaveric temporal-bone (CTB) dissection. STUDY DESIGN: Retrospective analysis. METHODS: An instrument was developed to assess resident performance on a yearly timed microdissection of CTB...
April 20, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28424860/influence-of-tibial-hybrid-fixation-on-graft-tension-and-stability-in-acl-double-bundle-reconstruction
#2
B H Drews, A Seitz, J Huth, G Bauer, A Ignatius, L Dürselen
PURPOSE: Initial graft tension in anterior cruciate ligament (ACL) reconstruction affects stability and tension loss at follow-up. This study investigated the influence of hybrid tibial fixation in 3-tunnel double-bundle ACL reconstruction on initial graft tension and tension change and stability under anterior and combined rotatory loads. METHODS: Eleven fresh-frozen cadaveric knees were reconstructed with an ACL double bundle using a 3-tunnel technique. Grafts were tightened to 80 N in 60° (AM bundle) and 15° (PL bundle) of flexion...
April 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28423932/comparing-biomechanical-properties-repair-times-and-value-of-common-core-flexor-tendon-repairs
#3
Aakash Chauhan, Patrick Schimoler, Mark C Miller, Alexander Kharlamov, Gregory A Merrell, Bradley A Palmer
BACKGROUND: The aim of the study was to compare biomechanical strength, repair times, and repair values for zone II core flexor tendon repairs. METHODS: A total of 75 fresh-frozen human cadaveric flexor tendons were harvested from the index through small finger and randomized into one of 5 repair groups: 4-stranded cross-stitch cruciate (4-0 polyester and 4-0 braided suture), 4-stranded double Pennington (2-0 knotless barbed suture), 4-stranded Pennington (4-0 double-stranded braided suture), and 6-stranded modified Lim-Tsai (4-0 looped braided suture)...
April 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28423232/a-psychometric-evaluation-of-the-anatomy-learning-experiences-questionnaire-and-correlations-with-learning-outcomes
#4
Derek L Choi-Lundberg, Anne-Marie M Williams, Craig Zimitat
The Anatomy Learning Experiences Questionnaire (ALEQ) was designed by Smith and Mathias to explore students' perceptions and experiences of learning anatomy. In this study, the psychometric properties of a slightly altered 34-item ALEQ (ALEQ-34) were evaluated, and correlations with learning outcomes investigated, by surveying first- and second-year undergraduate medical students; 181 usable responses were obtained (75% response rate). Psychometric analysis demonstrated overall good reliability (Cronbach's alpha of 0...
April 17, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28422889/an-in-vitro-biomechanical-evaluation-of-an-expansive-double-threaded-bi-directional-compression-screw-for-fixation-of-type-ii-odontoid-process-fractures-a-squire-compliant-article
#5
Ning Liu, Li Tian, Rong-Xian Jiang, Chao Xu, Lei Shi, Wei Lei, Yang Zhang
Odontoid process fracture accounts for 5% to 15% of all cervical spine injuries, and the rate is higher among elderly people. The anterior cannulated screw fixation has been widely used in odontoid process fracture, but the fixation strength may still be limited under some circumstances. This study aims to investigate the biomechanical fixation strength of expansive double-threaded bi-directional compression screw (EDBCS) compared with cannulated lag screw (CLS) and improved Herbert screw (IHS) for fixation of type II odontoid process fracture...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28420541/stability-of-lisfranc-injury-fixation-in-thiel-cadavers-is-routine-fixation-of-the-1st-and-3rd-tarsometatarsal-joint-necessary
#6
Alistair I W Mayne, Robert Lawton, Stephen Dalgleish, Fraser Harrold, George Chami
BACKGROUND: There is debate as to whether a home run screw (medial cuneiform to 2nd metatarsal base) combined with k-wire fixation of the 4th & 5th tarsometatarsal joints is sufficient to stabilise Lisfranc injuries or if fixation of the 1st and 3rd tarsometatarsal joints is also required. Unlike the 2nd, 4th and 5th tarsometatarsal joints, stabilisation of the 1st and 3rd requires either intra-articular screw or an extra-articular plate which risk causing chondrolysis and/or osteoarthritis...
April 11, 2017: Injury
https://www.readbyqxmd.com/read/28419756/posterior-ankle-labral-changes-at-mri-a-preliminary-study
#7
Nasir Khan, Navdeep Sahota, Michael L Shepel, Haron Obaid
INTRODUCTION: The transverse ligament in the ankle joint has been described as a labrum-like structure in a previous cadaveric study. The purpose of this study is to assess the spectrum of abnormal changes related to this structure on imaging/MRI, and correlate these findings with other ankle joint findings and patient symptoms. METHOD: A retrospective observational review of 172 ankle MRI scans was carried out independently by two fellowship trained musculoskeletal Radiologists...
April 17, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28418576/the-safe-zone-technique-improves-suture-placement-and-accuracy-during-arthroscopic-remplissage
#8
Grant H Garcia, Ryan M Degen, Joseph N Liu, Cynthia A Kahlenberg, Daniel J Hurwit, Joshua S Dines
In response to recent concerns about the accuracy of suture passage during arthroscopic remplissage, this study was conducted to determine whether a previously described "safe zone" technique can improve the accuracy of suture passage. A recommended safe zone technique was used for arthroscopic remplissage on 6 cadaveric specimens. The safe zone was described as a region at least 1 cm lateral and no greater than 3 cm distal to the posterolateral acromion. Results were compared with a control group of 6 specimens for which the safe zone technique was not used...
April 18, 2017: Orthopedics
https://www.readbyqxmd.com/read/28417049/morphometric-study-of-tensor-of-vastus-intermedius-in-south-indian-population
#9
Raveendranath Veeramani, Dhivyalakshmi Gnanasekaran
Tensor of vastus intermedius is a newly discovered muscle located between vastus lateralis and vastus intermedius. The purpose of this study was to investigate the detailed morphology of tensor of vastus intermedius, specifically to provide data pertaining to the attachments, innervations, variation in the types and its morphometry in South Indian population. The tensor of vastus intermedius was studied in thirty six cadaveric lower limbs using macrodissection techniques. The origin of the muscle was from upper part of intertrochanteric line and anterior part of greater trochanter of femur inserted to medial aspect of upper border of patella...
March 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28417048/is-tricuspid-valve-really-tricuspid
#10
Sunita Athavale, Rashmi Deopujari, Urmila Sinha, Rekha Lalwani, Sheetal Kotgirwar
Advancement in imaging techniques and interventional cardiology procedures have generated renewed interest in anatomy of tricuspid valve complex. The purpose of the present study was to characterize the morphology of tricuspid valve leaflets using objective criteria. Thirty-six embalmed cadaveric hearts were utilized for the present study. Leaflet morphology was studied using newly defined criteria. Commissural zones were identified and leaflets were delineated. Presence of scallops was also recorded. Single leaflet was observed in six cases, double in 26 cases, and triple in four cases...
March 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28416461/detection-of-penetration-of-the-dorsal-cortex-by-epiphyseal-screwsof-distal-radius-volar-plates-anatomical-study-comparing-ultrasoundandfluoroscopy
#11
Vernet Paul, Durry Anastasia, Nicolau Xavier, D'Ambrosio Adrien, Collinet Arnaud, Salazar Botero Santiago, Liverneaux Philippe, Hidalgo Diaz Juan José
Osteosynthesis of the distal radius by a volar plate can be complicated by lesions of extensor tendons by screws penetrating the dorsal cortex. The fluoroscopic skyline view enables to confirm the length of the screws. To avoid its risk of irradiation, some authors have recommended to use ultrasound instead. The goal of this study was to demonstrate that the detection rate of screws penetrating the dorsal cortex was at least as good using ultrasound compared to fluoroscopic skyline. A volar plate in which one screw penetrated the dorsal cortex was implanted in 10 cadaveric wrists...
April 14, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28416198/engineering-human-renal-epithelial-cells-for-transplantation-in-regenerative-medicine
#12
Vita Manzoli, David C Colter, Sridevi Dhanaraj, Alessia Fornoni, Camillo Ricordi, Antonello Pileggi, Alice A Tomei
Cellular transplantation may treat several human diseases by replacing damaged cells and/or providing a local source of trophic factors promoting regeneration. We utilized human renal epithelial cells (hRECs) isolated from cadaveric donors as a cell model. For efficacious implementation of hRECs for treatment of kidney diseases, we evaluated a novel encapsulation strategy for immunoisolation of hRECs and lentiviral transduction of the Green Fluorescent Protein (GFP) as model gene for genetic engineering of hRECs to secrete desired trophic factors...
April 13, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28413118/cadaveric-and-ultrasonographic-validation-of-needling-placement-in-the-cervical-multifidus-muscle
#13
César Fernández-de-Las-Peñas, Juan A Mesa-Jiménez, Jose A Paredes-Mancilla, Shane L Koppenhaver, Samuel Fernández-Carnero
OBJECTIVE: The aim of this study was to determine if a needle is able to reach the cervical multifidus during the application of dry needling or acupuncture. METHODS: Dry needling and ultrasound imaging of cervical multifidi was conducted on 5 patients (age: 32 ± 5 years) with mechanical neck pain and on 2 fresh cadavers (age: 64 ± 1 years). Dry needling was done using a needle of 40 mm in length inserted perpendicular to the skin about 1 cm lateral to the spinous process at C3-C4...
April 13, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28412879/quantitative-analysis-of-transnasal-anterior-skull-base-approach-report-of-technology-for-intraoperative-assessment-of-instrument-motion
#14
Angelique M Berens, Richard Alex Harbison, Yangming Li, Randall A Bly, Nava Aghdasi, Manuel Ferreira, Blake Hannaford, Kris S Moe
OBJECTIVE: To develop a method to measure intraoperative surgical instrument motion. This model will be applicable to the study of surgical instrument kinematics including surgical training, skill verification, and the development of surgical warning systems that detect aberrant instrument motion that may result in patient injury. DESIGN: We developed an algorithm to automate derivation of surgical instrument kinematics in an endoscopic endonasal skull base surgery model...
April 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28412565/the-use-of-a-novel-perfusion-based-cadaveric-simulation-model-with-cerebrospinal-fluid-reconstitution-comparing-dural-repair-techniques-a-pilot-study
#15
Joshua Bakhsheshian, Ben A Strickland, Neil N Patel, Andre M Jakoi, Michael Minneti, Gabriel Zada, Frank L Acosta, Patrick C Hsieh, Jeffrey C Wang, John C Liu, Martin H Pham
BACKGROUND CONTEXT: Watertight dural repair is crucial for both incidental durotomy and closure after intradural surgery. PURPOSE: To describe a perfusion-based cadaveric simulation model with cerebrospinal-fluid (CSF) reconstitution and to compare spine dural repair techniques. STUDY DESIGN/SETTING: Fresh Tissue Dissection Laboratory. SAMPLE SIZE: 8 fresh human cadavers. OUTCOME MEASURES: A watertight closure was achieved when pressurized saline up to 40 mm Hg did not cause further CSF leakage beyond the suture lines...
April 12, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28412187/restoring-volar-tilt-in-ao-type-c2-fractures-of-the-distal-radius-with-unilateral-external-fixation
#16
Kenneth F Taylor, David Gendelberg, Michael B Lustik, Matthew L Drake
PURPOSE: To determine whether unilateral external fixation using a staged multiplanar reduction technique restores anatomic volar tilt in a distal radius fracture model. METHODS: We used radiographic images to obtain baseline measurements in 20 fresh-frozen cadaveric wrists. Through a standard dorsal approach to the radius, we performed osteotomies to simulate displaced AO/ASIF type C2 fractures. After placement of a unilateral external fixator, a stepwise technique of applying longitudinal traction followed by a volar translational maneuver was performed...
April 12, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28411089/evidence-for-polymicrobial-communities-in-explanted-vascular-filters-and-atheroma-debris
#17
Jeremy E Ellis, Richard Heuser, Dara S Missan, Delyn Martinez, Avory Heningburg, Matthew Shabilla, Renata Schwartz, Stephen Fry
RATIONALE: Microbial communities have been implicated in a variety of disease processes and have been intermittently observed in arterial disease; however, no comprehensive unbiased community analysis has been performed. We hypothesize that complex microbial communities may be involved in chronic vascular diseases as well and may be effectively characterized by molecular assays. OBJECTIVE: The main objective is to survey vascular debris, atheroma, and vascular filters for polymicrobial communities consisting of prokaryotic and eukaryotic microbes, specifically eukaryotic microbes...
April 11, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/28410362/joint-assessment-of-donor-and-recipient-htert-gene-polymorphism-provides-additional-information-for-early-kidney-transplantation-outcomes
#18
Karolina Kłoda, Artur Mierzecki, Leszek Domański, Ewa Borowiecka, Krzysztof Safranow, Andrzej Ciechanowicz, Kazimierz Ciechanowski
BACKGROUND There are several genes and genetic loci affecting telomere length, including hTERT gene and BICD1 gene as well as polymorphisms within chromosome 18. It has been demonstrated that the age of the donor is a negative factor associated with long-term kidney allograft function, and that post-transplant complications accelerate transplanted organ aging, thus contributing to estimated glomerular filtration rate (eGFR) decreases. The aim of this study was a joint assessment of donors' and recipients' hTERT and BICD1 genes as well as chromosome 18 polymorphisms with regard to early kidney transplantation outcomes...
April 14, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28409726/the-suboccipital-ligament
#19
Kelsey Alabaster, M Fred Bugg, Bruno Splavski, Frederick A Boop, Kenan I Arnautovic
OBJECTIVE A fibrous structure located dorsal to the dura at the posterior craniocervical junction stretches horizontally between the bilateral occipital condyles and the upper borders of the C-1 laminae. Partially covered by the occipital bone, this structure is always encountered when the bone is removed from the foramen magnum rim during approaches to the posterior cranial fossa. Although known to surgeons, this structure has not been defined, studied, or named. The most appropriate name for this structure is "the suboccipital ligament," and a detailed rationale for this name is provided...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28409074/c2-and-greater-occipital-nerve-the-anatomic-and-functional-implications-in-spinal-surgery
#20
M Burhan Janjua, Peter L Zhou, Jeffrey P Greenfield, Ali A Baaj, Anthony Frempong-Boadu
INTRODUCTION: Posterior C1-C2 fusion is a highly successful treatment for atlantoaxial instability and other pathologies of the cervical spine, with fusion rates approaching 95%-100%. However, poor visualization of the lateral masses of C1 secondary to the course of the C2 nerve root along with blood loss from the venous plexus and compression of the C2 nerve from lateral mass screws are technical obstacles that can arise during surgery. Thus, sacrifice of the C2 nerve root has long since been debated in fusions involving the C1 and C2 vertebral bodies...
March 3, 2017: Curēus
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