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https://www.readbyqxmd.com/read/29027690/ultrasound-guided-posterior-femoral-cutaneous-nerve-block-a-cadaveric-study
#1
Christopher S Johnson, Rebecca L Johnson, Adam D Niesen, David E Stoike, Wojciech Pawlina
OBJECTIVES: To identify any anatomic barriers to local anesthetic spread between the sciatic nerve (SN) and the posterior femoral cutaneous nerve (PFCN) at the level of the infragluteal crease and to describe a potential technique for an ultrasound (US)-guided subgluteal PFCN block in a cadaveric model. METHODS: Bilateral US-guided subgluteal injections of a colored latex solution were performed around the SN (15 mL) and PFCN (10 mL) in 4 unembalmed cadavers, for a total of 8 cadaver thighs...
October 13, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29027586/computational-simulation-study-on-ilio-sacral-screw-fixations-for-pelvic-ring-injuries-and-implications-in-asian-sacrum
#2
Chang-Soo Chon, Jin-Hoon Jeong, Bokku Kang, Han Sung Kim, Gu-Hee Jung
OBJECTIVES: Despite a high possibility of technique-related complications, ilio-sacral (IS) screw fixation is the mainstay of operative management in posterior pelvic ring injuries. We aimed to make IS screw trajectory with fully intraosseous path that was optimal and consistent, and confirm the possibility of transiliac-transsacral (TITS) screw fixation in Asian sacrum. METHODS: Eighty-two cadaveric sacra (42 males and 40 females) were enrolled and underwent continuous 1...
October 13, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29026597/endoscopic-approach-for-management-of-biliary-strictures-in-liver-transplant-recipients-a-systematic-review-and-meta-analysis
#3
Dayse Pereira da Silva Aparício, José Pinhata Otoch, Edna Frasson de Souza Montero, Muhammad Ali Khan, Everson Luiz de Almeida Artifon
The most common biliary complication after liver transplantation is anastomotic stricture (AS) and it can occur isolated or in combination with other complications. Liver graft from a cadaveric donor or a living donor has an influence on the incidence of biliary strictures as well as on the response to endoscopic treatment. Endoscopic treatment using balloon dilation and insertion of biliary stents by endoscopic retrograde cholangiopancreatography (ERCP) is the initial approach to these complications. AIM: The aim of this article is to compare different endoscopic techniques to treat post-liver transplantation biliary strictures...
October 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/29024453/the-histopathologic-reliability-of-tissue-taken-from-cadavers-within-the-gross-anatomy-laboratory
#4
Guenevere Rae, William P Newman, Robin McGoey, Supriya Donthamsetty, Aryn C Karpinski, Jeffrey Green
The purpose of this study was to examine the histopathologic reliability of embalmed cadaveric tissue taken from the gross anatomy laboratory. Tissue samples from hearts, livers, lungs, and kidneys were collected after the medical students' dissection course was completed. All of the cadavers were embalmed in a formalin-based fixative solution. The tissue was processed, embedded in paraffin, sectioned at six micrometers, and stained with H&E. The microscope slides were evaluated by a board certified pathologist to determine whether the cellular components of the tissues were preserved at a high enough quality to allow for histopathologic diagnosis...
October 10, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/29023901/additive-manufactured-push-fit-implant-fixation-with-screw-strength-pull-out
#5
Richard J van Arkel, Shaaz Ghouse, Piers E Milner, Jonathan R T Jeffers
Additive manufacturing offers exciting new possibilities for improving long-term metallic implant fixation in bone through enabling open porous structures for bony ingrowth. The aim of this research was to investigate how the technology could also improve initial fixation, a precursor to successful long-term fixation. A new barbed fixation mechanism, relying on flexible struts was proposed and manufactured as a push-fit peg. The technology was optimised using a synthetic bone model and compared with conventional press-fit peg controls tested over a range of interference fits...
October 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29023687/a-guide-for-effective-anatomical-vascularization-studies-useful-ex%C3%A2-vivo-methods-for-both-ct-and-mri-imaging-before-dissection
#6
Yohann Renard, Gabriela Hossu, Bailiang Chen, Marine Krebs, Marc Labrousse, Manuela Perez
The objective of this study was to develop a simple and useful injection protocol for imaging cadaveric vascularization and dissection. Mixtures of contrast agent and cast product should provide adequate contrast for two types of ex vivo imaging (MRI and CT) and should harden to allow gross dissection of the injected structures. We tested the most popular contrast agents and cast products, and selected the optimal mixture composition based on their availability and ease of use. All mixtures were first tested in vitro to adjust dilution parameters of each contrast agent and to fine-tune MR imaging acquisition sequences...
October 11, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29023350/an-artificial-cadaveric-leg-blood-flow-system-for-endoscopic-vein-harvesting-simulation
#7
Constantine L Karras, Emily A DeDonato, Kaitlin K DiBartola, Jin-Cheng Zhao
Despite being the most common training model for endoscopic vein harvesting, cadaveric legs are limited by their absence of blood flow, resulting in a faded vascular appearance. Because the saphenous vein and the surrounding tissue seem less distinguishable, dissection of the saphenous vein and bipolar coagulation of its branches becomes increasingly inefficient and difficult. An inexpensive artificial blood flow system was developed to overcome this limitation. A cadaveric leg was thawed to a soft and yielding degree, and the saphenous vein was dissected medial and proximal to the medial malleolus...
October 11, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29022056/implant-strategy-affects-scaffold-stability-and-integrity-in-cartilage-treatment
#8
M Drobnic, Francesco Perdisa, E Kon, F Cefalì, M Marcacci, G Filardo
PURPOSE: To identify the most appropriate implantation strategy for a novel chondral scaffold in a model simulating the early post-operative phase, in order to optimize the implant procedure and reduce the risk of early failure. METHODS: Eight human cadaveric limbs were strapped to a continuous passive motion device and exposed to extension-flexion cycles (0°-90°). Chondral lesions (1.8 cm diameter) were prepared on condyles, patella and trochlea for the implant of a bi-layer collagen-hydroxyapatite scaffold...
October 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29020826/redefining-zone-ii-anatomy-of-the-flexor-digitorum-superficialis-insertion
#9
Luke T Nicholson, Jeffrey R Hill, Braden McKnight, Nathanael Heckmann, Milan Stevanovic, Alidad Ghiassi
BACKGROUND: Flexor zone II is defined as the region spanning the proximal aspect of the A1 pulley to the insertion of the flexor digitorum superficialis (FDS) tendon. Descriptions of the FDS insertion are inconsistent in the literature, but zones of injury are frequently determined with reference to superficial landmarks. The purpose of this study was to describe the footprint of the FDS insertion and define its relationship to the proximal interphalangeal (PIP) skin crease. METHODS: The FDS insertion on the index, middle, ring, and small fingers was dissected in 6 matched pairs of fresh-frozen cadaveric hands...
October 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29020705/mechanical-strength-of-the-proximal-tibia-following-total-knee-arthroplasty-a-cadaveric-study-of-resection-depth-and-bone-density
#10
Tatsuya Sueyoshi, Scott R Small, Jeffrey B Elliott, Grace E Gibbs, Ryan B Seale, Merrill A Ritter
BACKGROUND: Tibial component failure has been a problem in total knee arthroplasty, it is still undetermined how tibial resection depth affects the strength to support a tibial component. This study examined the relationship between the resection depth and the bone density and the mechanical strength to support the tibial component. MATERIALS AND METHODS: Eight matched pairs of fresh, frozen cadaver lower legs were imaged with computed tomography to assess the bone density...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29019902/in-vitro-biomechanical-comparison-after-fixed-and-mobile-core-artificial-cervical-disc-replacement-versus-fusion
#11
Jigang Lou, Yuanchao Li, Beiyu Wang, Yang Meng, Tingkui Wu, Hao Liu
In vitro biomechanical analysis after cervical disc replacement (CDR) with a novel artificial disc prosthesis (mobile core) was conducted and compared with the intact model, simulated fusion, and CDR with a fixed-core prosthesis. The purpose of this experimental study was to analyze the biomechanical changes after CDR with a novel prosthesis and the differences between fixed- and mobile-core prostheses.Six human cadaveric C2-C7 specimens were biomechanically tested sequentially in 4 different spinal models: intact specimens, simulated fusion, CDR with a fixed-core prosthesis (Discover, DePuy), and CDR with a mobile-core prosthesis (Pretic-I, Trauson)...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29019806/lumbar-vertebral-endplate-defects-on-magnetic-resonance-images-classification-distribution-patterns-and-associations-with-modic-changes-and-disc-degeneration
#12
Zhiyun Feng, Yuanhao Liu, Ge Yang, Michele C Battié, Yue Wang
STUDY DESIGN: A cross-sectional MR imaging study. OBJECTIVE: To classify and characterize endplate defects using routine lumbar MR images, and to determine associations of endplate defects with Modic Changes (MCs) and disc degeneration. SUMMARY OF BACKGROUND DATA: Previously, a cadaveric study revealed that endplate lesions were common and associated with back pain history. New in vivo approaches appropriate for clinical studies are needed to further this potentially important line of research on the clinical significance of endplate lesions, including their relation with MCs, disc degeneration and back pain...
October 10, 2017: Spine
https://www.readbyqxmd.com/read/29016507/cadaveric-nerve-and-artery-proximity-to-sacrospinous-ligament-fixation-sutures-placed-by-a-suture-capturing-device
#13
Aaron Z Katrikh, Rajuno Ettarh, Margie A Kahn
OBJECTIVE: To simulate sacrospinous ligament fixation on cadaveric specimens, describe the surrounding retroperitoneal anatomy, and estimate the risk to nerves and arteries for the purposes of optimizing safe suture placement. METHODS: Sacrospinous ligament fixation was performed on eight fresh-tissue female cadavers using a Capio ligature capture device. Distances from placed sutures to the following structures were measured: ischial spine; fourth sacral root; pudendal nerve; the nerve to coccygeus muscle; the nerve to levator ani muscle; inferior gluteal artery; and internal pudendal artery...
October 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29016430/an-anatomic-and-radiographic-study-of-the-distal-tibial-epiphysis
#14
Cynthia V Nguyen, Janelle D Greene, Daniel R Cooperman, Raymond W Liu
BACKGROUND: Although the undulating shape of the distal tibial epiphysis is well recognized, its anatomic features have not been well quantified in the literature. To guide the placement of surgical implants about the distal tibial physis, we investigated the topographical anatomy of the distal tibial epiphysis and explored the ability of standard radiographs to visualize the physis. METHODS: We studied 30 cadaveric distal tibial epiphyses in specimens 3 to 14 years of age...
October 9, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29016187/quantitative-and-qualitative-analysis-of-the-medial-patellar-ligaments-an-anatomic-and-radiographic-study
#15
Bradley M Kruckeberg, Jorge Chahla, Gilbert Moatshe, Mark E Cinque, Kyle J Muckenhirn, Jonathan A Godin, Taylor J Ridley, Alex W Brady, Elizabeth A Arendt, Robert F LaPrade
BACKGROUND: The qualitative and quantitative anatomy of the medial patellar stabilizers has been reported; however, a quantitative analysis of the anatomic and radiographic attachments of all 4 ligaments relative to anatomic and osseous landmarks, as well as to one another, has yet to be performed. PURPOSE: To perform a qualitative and quantitative anatomic and radiographic evaluation of the medial patellofemoral ligament (MPFL), medial patellotibial ligament (MPTL), medial patellomeniscal ligament (MPML), and medial quadriceps tendon femoral ligament (MQTFL) attachment sites, with attention to their relationship to pertinent osseous and soft tissue landmarks...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28994795/a-method-to-estimate-cadaveric-femur-cortical-strains-during-fracture-testing-using-digital-image-correlation
#16
Timothy Rossman, Susheil Uthamaraj, Asghar Rezaei, Sean McEligot, Hugo Giambini, Iwona Jasiuk, Michael J Yaszemski, Lichun Lu, Dan Dragomir-Daescu
This protocol describes the method using digital image correlation to estimate cortical strain from high speed video images of the cadaveric femoral surface obtained from mechanical testing. This optical method requires a texture of many contrasting fiduciary marks on a solid white background for accurate tracking of surface deformation as loading is applied to the specimen. Immediately prior to testing, the surface of interest in the camera view is painted with a water-based white primer and allowed to dry for several minutes...
September 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28994025/applying-the-glenoid-track-concept-in-the-management-of-patients-with-anterior-shoulder-instability
#17
REVIEW
Amit M Momaya, John M Tokish
PURPOSE OF REVIEW: The purpose of this paper is to evaluate the recent evolution in the treatment of anterior shoulder instability and the dynamic interaction between the glenoid and Hill-Sachs lesion. RECENT FINDINGS: Through the glenoid track concept, glenoid- and humeral-sided bone loss are evolving away from being approached as separate entities. Recent cadaveric studies have validated the glenoid track concept. Moreover, a recent clinical study has demonstrated a much higher rate of failure after arthroscopic Bankart repair for shoulders that were off track...
October 9, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28991851/quantitative-analysis-of-endothelial-cell-loss-in-preloaded-descemet-membrane-endothelial-keratoplasty-grafts
#18
Meraf A Wolle, David L DeMill, Lauren Johnson, Stephen I Lentz, Maria A Woodward, Shahzad I Mian
PURPOSE: Availability of preloaded Descemet membrane endothelial keratoplasty (pDMEK) tissue may increase acceptance of DMEK in surgical management of endothelial disease. The goal of this study was to determine the safety of pDMEK grafts for 24 hours before surgery by analyzing endothelial cell loss (ECL) using 2 image analysis software programs. METHODS: A total of 18 cadaveric corneas were prepared for DMEK using a standardized technique and loaded in a modified Jones tube injector...
November 2017: Cornea
https://www.readbyqxmd.com/read/28991378/accuracy-and-safety-of-pin-placement-during-lateral-versus-dorsal-stabilization-of-lumbar-spinal-fracture-luxation-in-dogs
#19
Joycelyn H Tran, David A Hall, John M Morton, Kirsten J Deruddere, Samuel R Snelling
OBJECTIVE: To determine the accuracy and safety of pin placement for lateral vertebral stabilization to the reference dorsal stabilization. STUDY DESIGN: A randomized noninferiority trial. SAMPLE POPULATION: Twenty Greyhound cadaveric lumbar spines (L1-L6). METHODS: One hundred and fifty-nine lumbar vertebral pins placed in 80 vertebrae were assessed; these pins were distributed approximately equally between the dorsal and lateral approaches, and between 2 surgeons...
October 9, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28990676/arthroscopic-approach-and-anatomy-of-the-stifle-joint-in-the-rabbit
#20
Sarah Torrey Peters, Markus Wilke, Tanja Schmid
OBJECTIVE: To describe a technique and normal findings for arthroscopy of the stifle in rabbits. STUDY DESIGN: Cadaver study. ANIMALS: Twenty cadaveric stifles from New Zealand White rabbits were examined. METHODS: The arthroscope was placed through a medial portal, and instrument portals were created on the lateral aspect of the joint. The same portals were used for examination of the entire joint and palpation of structures with a probe...
October 9, 2017: Veterinary Surgery: VS
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