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https://www.readbyqxmd.com/read/29458072/influence-of-xenorhabdus-gamma-proteobacteria-enterobacteriaceae-symbionts-on-gonad-postembryonic-development-in-steinernema-nematoda-steinernematidae-nematodes
#1
Alexandra C Roder, S Patricia Stock
Steinernema nematodes and their Xenorhabdus partners form an obligate mutualistic association. This partnership is insecticidal to a wide range of insects. Steinernema rely on their Xenorhabdus partner to produce toxins inside the insect cadaver to liberate nutrients from the insect, as well as antimicrobials to sterilize the cadaver, thus creating a suitable environment for reproduction. In return, Steinernema vector their Xenorhabdus between insect hosts. Disruption of this partnership may affect the success of both partners...
February 16, 2018: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29457120/spread-of-injectate-in-ultrasound-guided-serratus-plane-block-a-cadaveric-study
#2
Tatsuya Kunigo, Takeshi Murouchi, Shuji Yamamoto, Michiaki Yamakage
Background: Serratus plane block is a thoracic truncal block that has been proposed as alternatives for analgesia such as epidural anesthesia and paravertebral block for the anterolateral chest wall. Previously, we performed the clinical study about optimal volume of the local anesthetic in serratus plane block. The primary aim of this study was to assess the pattern of distribution of dye into the serratus plane of cadavers after ultrasound-guided serratus plane injection. Findings: Ultrasound-guided serratus plane injection was performed at the level of the fourth rib on the mid-axillary line in nine adult Thiel-embalmed cadavers...
2018: JA Clin Rep
https://www.readbyqxmd.com/read/29456066/slight-reduction-in-the-insertion-depth-for-an-all-suture-anchor-decreases-cyclic-displacement-in-the-shoulder-glenoid
#3
John A Ruder, Ephraim Y Dickinson, Nahir Habet, Richard D Peindl, Donald F D'Alessandro, James E Fleischli
PURPOSE: To determine if the depth of anchor insertion affects the biomechanical performance of a 1.5-mm all-suture anchor in glenoid bone. METHODS: A 1.5-mm all-suture anchor was tested in 8 matched pairs of human cadaver fresh-frozen glenoids. Anchors were inserted at 6 different locations and tested at 3 different depths: 21 mm (preset drilling depth), 17 mm, and 13 mm. Cyclic loading and destructive testing was performed. Displacement after 100 and 200 cycles, along with ultimate failure strength, was determined...
February 15, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29454839/monitoring-the-extent-of-vertical-and-lateral-movement-of-human-decomposition-products-through-sediment-using-cholesterol-as-a-biomarker
#4
Susan Luong, Shari L Forbes, James F Wallman, Richard G Roberts
Due to the lack of human decomposition research facilities available in different geographical regions, the extent of movement of human decomposition products from a cadaver into various sedimentary environments, in different climates, has not been able to be studied in detail. In our study, a human cadaver was placed on the surface of a designated plot at the Australian Facility for Taphonomic Experimental Research (AFTER), the only human decomposition facility in Australia, where the natural process of decomposition was allowed to progress over 14days in the Australian summer...
February 6, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29454543/characterization-of-the-passive-and-active-material-parameters-of-the-pubovisceralis-muscle-using-an-inverse-numerical-method
#5
M E T Silva, M P L Parente, S Brandão, T Mascarenhas, R M Natal Jorge
The mechanical characteristics of the female pelvic floor are relevant to understand pelvic floor dysfunctions (PFD), and how they are related with changes in their biomechanical behavior. Urinary incontinence (UI) and pelvic organ prolapse (POP) are the most common pathologies, which can be associated with changes in the mechanical properties of the supportive structures in the female pelvic cavity. PFD have been studied through different methods, from experimental tensile tests using tissues from fresh female cadavers or tissues collected at the time of a transvaginal hysterectomy procedure, or by applying imaging techniques...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29454119/anatomical-study-of-the-nutrient-foramina-of-the-posterior-axis-with-application-to-c2-pedicle-screw-placement
#6
Tamir Tawfik, Joe Iwanaga, Emre Yilmaz, Paul Choi, Charlotte Wilson, Emily Simonds, Jared J Marks, Haynes L Harkey, Rod J Oskouian, R Shane Tubbs
OBJECTIVE: Pedicle screws placed into C2 necessitate a thorough understanding of this bone's unique anatomy. Although multiple landmarks and measurements have been used by surgeons, these are often varied in the literature with no consensus. Herein, we studied one recently proposed landmark using the nutrient foramina of the posterior aspect of C2 for pedicle screw placement. METHODS: On 19 (38 sides) C2 dry bone specimens, the presence, size, location, and distance from the midline of the nutrient foramina found at the junction between the isthmus and lamina were documented and measured...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29452734/calcar-screw-position-in-proximal-humerus-fracture-fixation-don-t-miss-high
#7
Samir Mehta, Matthew Chin, Jennifer Sanville, Surena Namdari, Michael W Hast
INTRODUCTION: In locked plate fixation of proximal humerus fractures, the calcar is an important anchor point for screws providing much-needed medial column support. Most locking plate implants utilize a fixed-trajectory locking screw to achieve this goal. Consequently, adjustments of plate location to account for patient-specific anatomy may result in a screw position outside of the calcar. To date, little is known about the consequences of "missing" the calcar during plate positioning...
February 11, 2018: Injury
https://www.readbyqxmd.com/read/29451372/morphological-spectra-of-adult-human-stellate-ganglia-implications-for-thoracic-sympathetic-denervation
#8
Oh Jin Kwon, Shrita Pendekanti, Jacob N Fox, Jane Yanagawa, Michael C Fishbein, Kalyanam Shivkumar, H Wayne Lambert, Olujimi Ajijola
BACKGROUND: Cardiac sympathetic denervation (CSD) to treat ventricular arrhythmias (VAs) requires transection at the middle or lower third of stellate (cervicothoracic) ganglia (SG). However, the morphological appearance of the adult SG and distribution of neuronal somata within it are not well described. OBJECTIVE: To determine the morphology of left and right SG (LSG and RSG) and the distribution of somata within. METHODS: LSG and RSG (n=28) from 14 embalmed adult cadavers were dissected intact...
February 16, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29451317/ultrasound-guided-microinvasive-carpal-tunnel-release-using-a-novel-retractable-needle-mounted-blade-a-cadaveric-study
#9
Peter D Hebbard, Andrew I T Hebbard, Janos Tomka, Richard Appleyard
Ultrasound (US)-guided microinvasive procedures are defined as those performed via needles without notable scarring. Ten cadaver hands underwent US-guided microinvasive carpal tunnel release using a novel needle-based tool, the micro i-Blade (Summit Medical Products, Inc, Sandy, UT). A US-imaged landmark, the inflexion point of the ligaments distal to the hook of the hamate, was used to position the distal extent of the cut. The transverse carpal ligament was successfully released in all hands without damage to nerves or arteries...
February 16, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29447480/intramuscular-distribution-of-the-abducens-nerve-in-the-lateral-rectus-muscle-for-the-management-of-strabismus
#10
Hyun Jin Shin, Shin-Hyo Lee, Kang-Jae Shin, Ki-Seok Koh, Wu-Chul Song
AIMS: To elucidate the intramuscular distribution and branching patterns of the abducens nerve in the lateral rectus (LR) muscle so as to provide anatomical confirmation of the presence of compartmentalization, including for use in clinical applications such as botulinum toxin injections. METHODS: Thirty whole-mount human cadaver specimens were dissected and then Sihler's stain was applied. The basic dimensions of the LR and its intramuscular nerve distribution were investigated...
February 15, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29446678/interrater-agreement-and-diagnostic-accuracy-of-a-novel-computer-aided-detection-process-for-the-detection-and-prevention-of-retained-surgical-instruments
#11
Theodore C Marentis, Matthew S Davenport, Jonathan R Dillman, Ramon Sanchez, Aine M Kelly, Paul Cronin, Mariana R DeFreitas, Lubomir Hadjiiski, Heang-Ping Chan
OBJECTIVE: The purpose of this study is to evaluate the diagnostic accuracy of a process incorporating computer-aided detection (CAD) for the detection and prevention of retained surgical instruments using a novel nondeformable radiopaque μTag. MATERIALS AND METHODS: A high-specificity CAD system was developed iteratively from a training set (n = 540 radiographs) and a validation set (n = 560 radiographs). A novel test set composed of 700 thoracoabdominal radiographs (410 with a randomly placed μTag and 290 without a μTag) was obtained from 10 cadavers embedded with confounding iatrogenic objects...
February 15, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29445296/the-ultrasound-guided-retrolaminar-block-volume-dependent-injectate-distribution
#12
Marija Damjanovska, Tatjana Stopar Pintaric, Erika Cvetko, Kamen Vlassakov
Purpose: The ultrasound-guided retrolaminar block is one of the newer and simpler alternatives to the traditional, often technically challenging, paravertebral (PV) block. Its feasibility, safety, and efficacy have already been clinically demonstrated in patients with multiple rib fractures using higher volumes of local anesthetic, when compared with the traditional approach. The primary aim of this observational anatomical study was to assess the spread of local anesthetic from the retrolaminar injection point to the PV space and its volume dependence...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29443845/raising-the-joint-line-in-tka-is-associated-with-mid-flexion-laxity-a-study-in-cadaver-knees
#13
Thomas Luyckx, Hilde Vandenneucker, Lennart Scheys Ing, Evie Vereecke, Arnout Victor Ing, Jan Victor
BACKGROUND: In a typical osteoarthritic knee with varus deformity, distal femoral resection based off the worn medial femoral condyle may result in an elevated joint line. In a setting of fixed flexion contracture, the surgeon may choose to resect additional distal femur to obtain extension, thus purposefully raising the joint line. However, the biomechanical effect of raising the joint line is not well recognized. QUESTIONS/PURPOSES: (1) What is the effect of the level of the medial joint line (restored versus raised) on coronal plane stability of a TKA? (2) Does coronal alignment technique (mechanical axis versus kinematic technique) affect coronal plane stability of the knee? (3) Can the effect of medial joint-line elevation on coronal plane laxity be predicted by an analytical model? METHODS: A TKA prosthesis was implanted in 10 fresh frozen nonarthritic cadaveric knees with restoration of the medial joint line at its original level (TKA0)...
March 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29442163/accuracy-and-feasibility-of-a-dedicated-image-guidance-solution-for-endoscopic-lateral-skull-base-surgery
#14
Christoph Rathgeb, Lukas Anschuetz, Daniel Schneider, Cilgia Dür, Marco Caversaccio, Stefan Weber, Tom Williamson
OBJECTIVE: We aimed to design, build and validate a surgical navigation system which fulfills the accuracy requirements for surgical procedures on the ear and the lateral skull base, and which integrates with the endoscopic workflow and operating room setup. MATERIALS AND METHODS: The navigation system consists of portable tablet computer (iPad Pro, Apple Computer, USA) and an optical tracking system (Cambar B1, Axios3D, Germany), both connected via a wireless Bluetooth link and attached directly to the OR table...
February 13, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29441756/three-software-tools-for-viewing-sectional-planes-volume-models-and-surface-models-of-a-cadaver-hand
#15
Beom Sun Chung, Min Suk Chung, Byeong Seok Shin, Koojoo Kwon
BACKGROUND: The hand anatomy, including the complicated hand muscles, can be grasped by using computer-assisted learning tools with high quality two-dimensional images and three-dimensional models. The purpose of this study was to present up-to-date software tools that promote learning of stereoscopic morphology of the hand. METHODS: On the basis of horizontal sectioned images and outlined images of a male cadaver, vertical planes, volume models, and surface models were elaborated...
February 19, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29439367/snrpn-controls-the-ability-of-neurons-to-regenerate-axons
#16
Sonja Mertsch, Katrin Schlicht, Harutyun Melkonyan, Stefan Schlatt, Solon Thanos
BACKGROUND: Retinal ganglion cells (RGCs) of mammals lose the ability to regenerate injured axons during postnatal maturation, but little is known about the underlying molecular mechanisms. OBJECTIVE: It remains of particular importance to understand the mechanisms of axonal regeneration to develop new therapeutic approaches for nerve injuries. METHODS: Retinas from newborn to adult monkeys (Callithrix jacchus)1 were obtained immediately after death and cultured in vitro...
2018: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29438201/location-of-the-septoaponeurosis-junction-relative-to-the-tarsal-plate-in-upper-eyelids
#17
Kun Hwang, Seong Kyung Yoo, Dae Joong Kim
The aim of this study was to measure the location of the septoaponeurosis junction relative to the tarsal plate in the upper eyelids of Koreans through a histologic study.Thirty-four upper eyelids from 34 Korean adult cadavers (mean age, 77.8 years) were used. Sagittal sections on the midpupillary line were made, and 10-μm-thick sections were prepared and stained with hematoxylin-eosin and Masson trichrome. Under a magnifying loupe with a scale, the height of the tarsal plate (HTP), thickness of the tarsal plate (TTP), distance from the lid margin to the septoaponeurosis junction (MJD), and distance from the upper border of the tarsal plate to the septoaponeurosis junction (TJD) were measured...
February 12, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29435816/rapid-and-reliable-detection-of-previous-freezing-of-cerebral-tissue-by-computed-tomography-and-magnetic-resonance-imaging
#18
Stephan A Bolliger, Doris Tomasin, Jakob Heimer, Henning Richter, Michael J Thali, Dominic Gascho
Due to slowing or even inhibition of postmortem processes, freezing may make an estimation of the time-since-death very difficult. This is also true in previously frozen and subsequently thawed bodies. Knowledge of prior freezing is important, as it may lead to a different assessment of the time since death. Twelve pig heads were frozen at -20 °C, and 6 heads were either kept at room temperature (approximately 20 °C) or in a cooling cell (approximately 5 °C). The frozen brains and cadavers were thawed at either room temperature or in a cooling cell...
February 12, 2018: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/29435757/defining-minimal-clearances-for-adequate-lymphatic-resection-relevant-to-right-colectomy-for-cancer-a-post-mortem-study
#19
Jens Marius Nesgaard, Bojan V Stimec, Pricilla Soulie, Bjørn Edwin, Arne Bakka, Dejan Ignjatovic
BACKGROUND: There has been a lengthy discussion on the extent of lymphatic resection for right-sided colon cancer and the central borders of the mesentery that are not yet defined. The objectives of this study are to define minimal clearances for adequate lymphatic resection in regard to colic artery origins and the superior mesenteric artery (SMA) and vein (SMV) relevant to right colectomy. METHODS: Central mesenteric lymph vessels, nodes, and blood vessels were dissected in 16 cadavers...
February 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29433887/a-cadaveric-procedural-anatomy-simulation-course-improves-video-based-assessment-of-operative-performance
#20
Gaurav Sharma, Mario A Aycart, Lynne O'Mara, Joaquim Havens, Matthew Nehs, Naomi Shimizu, Douglas S Smink, Edwin Gravereaux, Jonathan D Gates, Reza Askari
BACKGROUND: Inadequate anatomic knowledge has been cited as a major contributor to declining surgical resident operative competence. We analyzed the impact of a comprehensive, procedurally oriented cadaveric procedural anatomy dissection laboratory on the operative performance of surgery residents, hypothesizing that trainees' performance of surgical procedures would improve after such a dissection course. MATERIALS AND METHODS: Midlevel general surgery residents (n = 9) participated in an 8 wk, 16-h surgery faculty-led procedurally oriented cadaver simulation course...
March 2018: Journal of Surgical Research
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