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https://www.readbyqxmd.com/read/29054160/3d-geometric-morphometrics-of-thorax-variation-and-allometry-in-hominoidea
#1
Markus Bastir, Daniel García-Martínez, Scott A Williams, Wolfgang Recheis, Isabel Torres-Sánchez, Francisco García Río, Motoharu Oishi, Naomichi Ogihara
Ever since the seminal papers of Keith and Schultz, hominoid primate ribcages have been described as either "funnel-" or "barrel-shaped." Following this dichotomic typology, it is currently held that Homo sapiens and hylobatids (gibbons and siamangs) share a barrel-shaped ribcage and that they are more similar to each other than to the funnel-shaped thoraces of great apes (Gorilla, Pan, and Pongo). Other researchers hypothesized that thoracic width and the invagination of the thoracic spine into the thorax are related to allometry...
December 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29053084/intubation-biomechanics-validation-of-a-finite-element-model-of-cervical-spine-motion-during-endotracheal-intubation-in-intact-and-injured-conditions
#2
Benjamin C Gadomski, Snehal S Shetye, Bradley J Hindman, Franklin Dexter, Brandon G Santoni, Michael M Todd, Vincent C Traynelis, Robert P From, Ricardo B Fontes, Christian M Puttlitz
OBJECTIVE Because of limitations inherent to cadaver models of endotracheal intubation, the authors' group developed a finite element (FE) model of the human cervical spine and spinal cord. Their aims were to 1) compare FE model predictions of intervertebral motion during intubation with intervertebral motion measured in patients with intact cervical spines and in cadavers with spine injuries at C-2 and C3-4 and 2) estimate spinal cord strains during intubation under these conditions. METHODS The FE model was designed to replicate the properties of an intact (stable) spine in patients, C-2 injury (Type II odontoid fracture), and a severe C3-4 distractive-flexion injury from prior cadaver studies...
October 20, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29053078/contralateral-transmaxillary-corridor-an-augmented-endoscopic-approach-to-the-petrous-apex
#3
Chirag R Patel, Eric W Wang, Juan C Fernandez-Miranda, Paul A Gardner, Carl H Snyderman
OBJECTIVE The endoscopic endonasal approach (EEA) has been shown to be an effective means of accessing lesions of the petrous apex. Lesions that are lateral to the paraclival segment of the internal carotid artery (ICA) require lateralization of the paraclival segment of the ICA or a transpterygoid infrapetrous approach. In this study the authors studied the feasibility of adding a contralateral transmaxillary (CTM) corridor to provide greater access to the petrous apex with decreased need for manipulation of the ICA...
October 20, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29052783/anatomical-study-of-the-left-superior-mediastinal-lymphatics-for-tracheal-branches-of-left-recurrent-laryngeal-nerve-preserving-mediastinoscope-assisted-surgery-in-esophageal-cancer
#4
Yutaka Nakajima, Yutaka Tokairin, Yasuaki Nakajima, Kenro Kawada, Kagami Nagai, Kumiko Yamaguchi, Keiichi Akita, Tatsuyuki Kawano
PURPOSE: Curative treatment of esophageal cancer requires meticulous superior mediastinal lymphadenectomy, in addition to esophagectomy, because superior mediastinal lymph node metastases are common in esophageal cancer. When preserving the tracheal branches of the left recurrent laryngeal nerve (RLN), good anatomical understanding is required for confirmation of the positional relationships between the courses of lymphatic vessels, lymph node distribution, and the left RLN and its tracheal branches...
October 20, 2017: Surgery Today
https://www.readbyqxmd.com/read/29050856/the-relationship-between-age-rotator-cuff-integrity-and-osseous-microarchitecture-of-greater-tuberosity-where-should-we-put-anchor
#5
Erica Kholinne, Hyun Joo Lee, Sung Jung Kim, So Hyun Park, In-Ho Jeon
OBJECTIVE: The aim of this study was to compare the microarchitecture of the greater tuberosity with or without rotator cuff tear and to obtain optimum location for anchor screw insertion for rotator cuff repair. METHODS: Twenty-five humeral heads were harvested from 13 male cadavers of mean age 58.4 years, including 6 humeri with rotator cuff tear and 19 intact humeri. Six regions of interest (proximal, intermediate, and distal zones of the superficial and deep regions) were divided into the anterior (G1), middle (G2), and posterior (G3) areas of the greater tuberosity...
October 16, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29050161/-oblique-puncture-approach-via-anterolateral-to-c2-a-study-of-imaging-anatomy-on-corpses
#6
W H Yu, S C He, R J Du, H D Zhu, W Fang, S S Li, F H Sun
Objective: To determine the anatomical relation between the carotid artery or laryngopharynx and the needle path via anterolateral oblique approach to C2 vertebral body, and whether the simulated path can direct the actual procedure. Methods: Contrast agent was injected into bilateral carotid arteries of 10 fresh cadavers (20 sides), and then CT scans were performed on each subject. Bilateral simulated puncture paths were simulated on the image of two-dimensional reconstruction CT. The distance between the puncture site and middle line(AC), the angle between the simulated puncture paths and the median sagittal plane (AOB), the distance between the simulated puncture paths and the side wall of hypopharynx, or the carotid artery was measured respectively...
October 10, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29049147/virtual-reality-model-of-the-three-dimensional-anatomy-of-the-cavernous-sinus-based-on-a-cadaveric-image-and-dissection
#7
Zeng-Hui Qian, Xu Feng, Yang Li, Ke Tang
OBJECTIVE: Studying the three-dimensional (3D) anatomy of the cavernous sinus is essential for treating lesions in this region with skull base surgeries. Cadaver dissection is a conventional method that has insurmountable flaws with regard to understanding spatial anatomy. The authors' research aimed to build an image model of the cavernous sinus region in a virtual reality system to precisely, individually and objectively elucidate the complete and local stereo-anatomy. METHODS: Computed tomography and magnetic resonance imaging scans were performed on 5 adult cadaver heads...
October 18, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29049098/distribution-of-elastic-fibers-in-the-lacrimal-sac-and-nasolacrimal-duct-of-japanese-cadavers
#8
Yoshiyuki Kitaguchi, Yasuhiro Takahashi, Takashi Nakano, Munekazu Naito, Hiroshi Ikeda, Hidetaka Miyazaki, Hirohiko Kakizaki
PURPOSE: To investigate the distribution of elastic fibers in lacrimal sac and nasolacrimal duct of Japanese cadavers. METHODS: We examined 8 lacrimal sacs and nasolacrimal ducts of 7 Japanese cadavers (4 right sides, 4 left sides; 3 mal es, 4 females; average age of 89 years at death) that were preserved with 10% buffered formalin. The harvested specimens were transversely sectioned. All specimens were stained with Elastica van Gieson. Micrographs were taken, and then converted to white and black images, and the elastic fiber density of 4 locations (middle and upper levels of lacrimal sac, and middle and lower levels of nasolacrimal duct) was compared...
October 14, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29047295/enhanced-irrigant-delivery-to-the-ethmoid-sinuses-directly-following-ethmoid-punch-sinusotomy
#9
Waleed M Abuzeid, Asa Z Peterson, Aakanksha Rathor, Jordan C Xu, Nathalia Velasquez, Ali R Rashan, Andrew Thamboo, Jayakar V Nayak
OBJECTIVES: Ethmoid punch sinusotomy (EPS) is a feasible treatment for ethmoid sinusitis in a subset of chronic rhinosinusitis (CRS) patients per a recent report. This adjunctive work investigates the technical characteristics of EPS and determines if EPS measurably alters the topical delivery of irrigant into the ethmoid sinuses in a cadaveric model. METHODS: The sinonasal cavities of 10 human cadaver heads were irrigated with a solution containing methylene blue and radio-opaque contrast prior to and following EPS...
October 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29046095/surgical-placement-of-rectus-sheath-catheters-in-a-cadaveric-cystectomy-model
#10
Ecp Chedgy, G Lowe, R Tang, C Krebs, A Sawka, H Vaghadia, M E Gleave, A I So
Introduction Surgically inserted rectus sheath catheters (RSCs) are used increasingly for analgesia after cystectomy and other abdominal surgery. Currently, there is little information on the optimal positioning of RSCs to allow maximal spread of local anaesthetic. This study sought to assess the spread of dye injected via RSCs and to highlight the extent of its coverage in a fresh unembalmed cadaveric cystectomy model in order to confirm the nerve endings that are likely to be anaesthetised with RSCs. Methods Four cadavers underwent lower midline incision with limited bladder mobilisation...
October 19, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29044664/a-new-technique-of-surgical-planning-for-anterior-cruciate-ligament-reconstruction-feasibility-assessment-of-shear-wave-elastography-to-tendon-of-semitendinosus-muscle
#11
Yoshiaki Itoigawa, Yuji Takazawa, Yuichiro Maruyama, Keiichi Yoshida, Tatsuo Sakai, Koichiro Ichimura, Kazuo Kaneko
There is currently no method to quantify the quality of the harvested graft before anterior cruciate ligament (ACL) reconstruction. The purpose of the present study was to explore a method for measuring stiffness of the normal tendon of the semitendinosus muscle using shear wave elastography (SWE). Our investigation comprised two steps. First, we determined orientation of the semitendinosus tendon fibers in 20 lower legs of embalmed cadavers. Second, we investigated the feasibility of quantifying stiffness of the normal semitendinosus tendon by SWE in 24 subjects (48 legs: 24 male and 24 female subjects) in vivo...
October 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29043523/analysis-of-potential-factors-affecting-allografts-contamination-at-retrieval
#12
A Paolin, C Romualdi, L Romagnoli, D Trojan
The microbiological contamination of retrieved tissues has become a very important topic and it is a critical aspect in the safety of allografts, especially from multi-tissue donors whose tissues are frequently contaminated as a consequence of retrieval. We analysed a total of 10,107 tissues, 8178 musculoskeletal and 1929 cardiovascular tissues, retrieved from 978 multi-tissue donors. Of these, 159 heart-beating donors (HBD) were also organ donors, while the remaining 819 non-heart-beating donors (NHBD) were tissue donors only...
October 17, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29043093/anatomical-study-of-petrous-and-cavernous-parts-of-internal-carotid-artery
#13
Manisha Vijaywargiya, Rashmi Deopujari, Sunita Arvind Athavale
The petrous and cavernous parts of internal carotid artery (ICA) are obscure and are not readily accessible to observation/imaging. These parts have broad biological and medical interest because of their peculiar shape. Given the their clinical importance and the scarce data available based mostly on imaging, the present study was aimed at studying these parts of ICA by dissection. The study was carried out on 56 ICAs obtained from embalmed adult cadavers and 10 ICAs from five fetuses. The foetal ICAs were studied in situ...
September 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29037824/resource-usage-implementing-the-surgical-resident-prep-curriculum-at-a-single-institution
#14
Lily Owei, Chris Neylan, Rachel Kelz, Kristoffel R Dumon, Steve R Allen, Noel Williams, Daniel T Dempsey, Carla Fisher
OBJECTIVE: The Resident Prep Curriculum (RPC), published in 2014 and developed as a collaboration of the American College of Surgeons, Association of Program Directors in Surgery, and the Association for Surgical Education, was designed to improve the quality and consistency of medical student preparation for surgical residency. We aim to assess the feasibility of and resource usage for implementation of this curriculum at our institution. DESIGN: Our institution expanded upon a pre-existing 2-week surgical preparatory course, adding modules designed to meet the goals and objectives of the RPC...
October 13, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/29037823/the-development-of-a-novel-perfused-cadaver-model-with-dynamic-vital-sign-regulation-and-real-world-scenarios-to-teach-surgical-skills-and-error-management
#15
Michael Minneti, Craig J Baker, Maura E Sullivan
The landscape of graduate medical education has changed dramatically over the past decade and the traditional apprenticeship model has undergone scrutiny and modifications. The mandate of the 80-hour work-week, the introduction of integrated residency programs, increased global awareness about patient safety along with financial constraints have spurred changes in graduate educational practices. In addition, new technologies, more complex procedures, and a host of external constraints have changed where and how we teach technical and procedural skills...
October 13, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/29037822/how-does-level-and-type-of-experience-affect-measurement-of-joint-range-of-motion
#16
Russell R Russo, Matthew B Burn, Sabir K Ismaily, Brayden J Gerrie, Shuyang Han, Jerry Alexander, Christopher Lenherr, Philip C Noble, Joshua D Harris, Patrick C McCulloch
OBJECTIVES: Comparison of range of motion measurements by 3 types of investigators with different levels and types of training using three different measurement techniques. The study hypothesis was that the accuracy and precision of range of motion measurements would vary based on (1) the level and type of experience of the investigator and (2) the measurement technique used. DESIGN/SETTING: Descriptive laboratory study. PARTICIPANTS: Ten fresh frozen cadavers (20 upper and 20 lower extremities)...
October 13, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/29037517/comparative-studies-of-different-types-of-osteosynthesis-on-the-human-corpse-preparation-in-bilateral-antero-lateral-flail-chest
#17
Sina Grupp, Veronika Fürst, Thomas Buder, Alexander Fichte, Sebastian Krinner, Roman T Carbon, Friedrich F Hennig, Andreas Langenbach, Stefan Schulz-Drost
INTRODUCTION: Bilateral flail chest injuries are challenging in treatment and comparatively often require an operative stabilization of the anterior chest wall to re-establish normal physiological conditions of the chest wall in shape and statics. Various procedures have been described which are technically sophisticated for the surgeon. Consequently there is an increasing interest in potentials of operative care and their effectiveness on the anterolateral chest wall. MATERIALS AND METHODS: 12 Human cadavers were prepared and the natural Sternum Position (NP) was marked...
October 9, 2017: Injury
https://www.readbyqxmd.com/read/29037453/establishment-of-calculated-panel-reactive-antibody-and-its-potential-benefits-in-improving-the-kidney-allocation-strategy-in-taiwan
#18
Ssu-Wen Shen, Chun-Kai Chang, Yi-Shun Gao, Pin-Jou Hsu, Shuo-Chueh Cheng, Fei-Yun Liu, Shyh-Chyi Lo
BACKGROUND/PURPOSE: Renal transplant candidates who are highly sensitized to human leukocyte antigens (HLAs) tend to wait longer to find a matched donor and have poor outcomes. Most organ-sharing programs prioritize highly sensitized patients in the allocation scoring system. The HLA sensitization status is traditionally evaluated by the panel-reactive antibody (PRA) assay. However, this assay is method dependent and does not consider the ethnic differences in HLA frequencies. A calculated PRA (cPRA), based on a population's HLA frequency and patients' unacceptable antigens (UAs), correctly estimates the percentage of donors suitable for candidates...
October 13, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/29035841/verification-of-an-improved-hip-joint-center-prediction-method
#19
Emily J Miller, Kenton R Kaufman
In motion analysis, the hip joint center (HJC) is used to define the proximal location of the thigh segment and is also the point about which hip moments are calculated. The HJC cannot be palpated; its location must be calculated. Functional methods have been proposed but are difficult to perform by some clinical populations. Therefore, regression methods are utilized, but yield large errors in estimating the HJC location. These prediction methods typically utilize the anterior and posterior superior iliac spines, where excessive adipose tissue makes correctly locating difficult...
October 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29034512/superficial-temporal-artery-perforator-flap-anatomic-study-of-number-and-reliability-of-distal-branches-of-the-superficial-temporal-artery-and-clinical-applications-in-three-cases
#20
Achille Aveta, Beniamino Brunetti, Stefania Tenna, Francesco Segreto, Paolo Persichetti
BACKGROUND: Limited information is available about the anatomical feasibility and clinical applications of flaps based on distal divisions of the superficial temporal artery (STA). The aim of this study was to investigate the anatomy of the STA, focusing on the number and reliability of distal branches and to show representative cases for the use of such flaps for zygomatic, parieto-frontal and occipital reconstructions. METHODS: Fifty volunteers were examined bilaterally by Doppler to investigate the presence and variability of the distal divisions of STA branches...
October 16, 2017: Microsurgery
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