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https://www.readbyqxmd.com/read/29778105/trailing-haptic-first-modification-of-double-needle-intrascleral-haptic-fixation-technique
#1
Dooho Brian Kim
The Yamane double-needle intrascleral haptic fixation technique for posterior chamber intraocular lens (IOL) fixation in the setting of absent or inadequate capsule support is a minimally invasive IOL fixation technique that requires scleral incisions using needles to externalize the IOL haptics. Despite being a seemingly easy and intuitive procedure, there are significant challenges when learning this technique. The most difficult step is threading the trailing haptic with the needle for fixation. If using an IOL with weak haptics, this step can result in haptic kink or breakage, which renders the haptics useless for this technique and necessitating explantation of the IOL...
April 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29776425/combined-application-of-latissimus-dorsi-myocutaneous-flap-and-iliac-bone-flap-in-the-treatment-of-chronic-osteomyelitis-of-the-lower-extremity
#2
Jihui Ju, Lei Li, Rong Zhou, Ruixing Hou
BACKGROUND: To evaluate the clinical efficacy and safety of latissimus dorsi myocutaneous flap (stage I) combined with iliac bone flap (stage II) in the treatment of chronic osteomyelitis of the lower extremity. METHODS: Clinical data of 18 patients undergoing latissimus dorsi myocutaneous flap in combination with iliac bone flap grafting were retrospectively analyzed. Among them, 2 patients developed chronic osteomyelitis of the lower segment of the femur, 4 were diagnosed with chronic osteomyelitis of the tibial plateau, and 12 with chronic osteomyelitis of the lower segment of the tibia...
May 18, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29774222/asymmetrical-traumatic-bilateral-hip-dislocations-with-hemodynamic-instability-and-an-unstable-pelvic-ring-case-report-and-review-of-literature
#3
Kai Huang, Grey Giddins, Jian-Fang Zhang, Jian-Wei Lu, Jun-Ming Wan, Peng-Li Zhang, Shao-Yu Zhu
Simultaneous anterior and posterior traumatic dislocations of both hips are very rare. Only 33 cases have been previously reported in the English language literature. Although they were all due to high-energy injuries, they were hemodynamically stable and had a stable pelvic ring. We report a unique case of asymmetrical hip dislocations with an unstable pelvic ring and hemodynamic instability. A 40-year-old man was injured in a high-energy motor vehicle accident. He was hemodynamically unstable when he presented in the emergency department...
May 16, 2018: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29766347/towards-alternative-approaches-for-coupling-of-a-soft-robotic-sleeve-to-the-heart
#4
Markus A Horvath, Claudia E Varela, Eimear B Dolan, William Whyte, David S Monahan, Christopher J Payne, Isaac A Wamala, Nikolay V Vasilyev, Frank A Pigula, David J Mooney, Conor J Walsh, Garry P Duffy, Ellen T Roche
Efficient coupling of soft robotic cardiac assist devices to the external surface of the heart is crucial to augment cardiac function and represents a hurdle to translation of this technology. In this work, we compare various fixation strategies for local and global coupling of a direct cardiac compression sleeve to the heart. For basal fixation, we find that a sutured Velcro band adheres the strongest to the epicardium. Next, we demonstrate that a mesh-based sleeve coupled to the myocardium improves function in an acute porcine heart failure model...
May 15, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29766123/orthopaedic-traumatology-fundamental-principles-and-current-controversies-for-the-acute-care-surgeon
#5
REVIEW
Shad K Pharaon, Shawn Schoch, Lucas Marchand, Amer Mirza, John Mayberry
Multiply injured patients with fractures are co-managed by acute care surgeons and orthopaedic surgeons. In most centers, orthopaedic surgeons definitively manage fractures, but preliminary management, including washouts, splinting, reductions, and external fixations, may be performed by selected acute care surgeons. The acute care surgeon should have a working knowledge of orthopaedic terminology to communicate with colleagues effectively. They should have an understanding of the composition of bone, periosteum, and cartilage, and their reaction when there is an injury...
2018: Trauma surgery & acute care open
https://www.readbyqxmd.com/read/29764303/relief-from-intractable-phantom-pain-by-combining-psilocybin-and-mirror-visual-feedback-mvf
#6
Vilayanur Ramachandran, Chaipat Chunharas, Zeve Marcus, Timothy Furnish, Albert Lin
AL's leg was amputated resulting in phantom-limb pain (PLP). (1) When a volunteer placed her foot on or near the phantom - touching it evoked organized sensations in corresponding locations on AL's phantom. (2) Mirror-visual-feedback (MVF) relieved PLP, as did, "phantom massage". (3) Psilocybin-MVF pairing produced synergistic effects, complete elimination of PLP, and reduction in paroxysmal episodes. (4) Touching the volunteer's leg where AL previously had external fixators, evoked sensation of nails boring through the leg...
May 15, 2018: Neurocase
https://www.readbyqxmd.com/read/29762283/five-to-ten-year-outcomes-of-operatively-treated-scapular-fractures
#7
Joscelyn M Tatro, Jeffrey A Gilbertson, Lisa K Schroder, Peter A Cole
BACKGROUND: The purpose of this study was to assess the 5 to 10-year clinical and patient-reported functional outcomes after open reduction and internal fixation (ORIF) of intra-articular and extra-articular scapular fractures. METHODS: We conducted a retrospective review of prospectively collected data on 106 patients who underwent ORIF of a scapular fracture at a single level-I trauma center between January 2005 and December 2010. Eight patients were excluded from the study because they had either severe neurologic injury or an isolated process fracture, and 66 patients (37 with an isolated extra-articular fracture and 29 with an intra-articular fracture) participated in the 5 to 10-year follow-up, yielding a follow-up rate of 67%...
May 16, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29761212/the-elastic-capacity-of-a-tendon-repair-construct-influences-the-force-necessary-to-induce-gapping
#8
Atesch Ateschrang, Christoph Salewski, Marc-Daniel Ahrend, Anna Janine Schreiner, Michael T Hirschmann, Ulrich Stöckle, Sufian S Ahmad
PURPOSE: Most biomechanical investigations of tendon repairs were based on output measures from hydraulic loading machines, therefore, accounting for construct failure rather than true gapping within the rupture zone. It was hypothesized that the elastic capacity of a tendon-repair construct influences the force necessary to induce gapping. METHODS: A tendon-repair model was created in 48 porcine lower hind limbs, which were allocated to three fixation techniques: (1) Krackow, (2) transosseous and (3) anchor fixation...
May 14, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29759883/minimally-invasive-plate-osteosynthesis-for-tibial-derotation-osteotomies-in-children-with-cerebral-palsy
#9
Ilker Abdullah Sarikaya, Ali Seker, Ozan Ali Erdal, Mehmet Ali Talmac, Muharrem Inan
OBJECTIVE: Tibial derotation osteotomy can be used in the treatment of rotational deformities in case of ineffective conservative management. Our aim was to evaluate the results of the patients who underwent minimal invasive plate osteosynthesis for tibial derotation osteotomies. METHODS: Total of 16 patients (17 procedures) were included in this study. Mean age was 11.5 (3-25) years. We clinically assessed the tibial torsion by measuring the thigh-foot angle (TFA)...
May 11, 2018: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29758368/infections-following-cranial-neurosurgery-prospective-cohort-of-103-episodes-treated-according-to-a-standardized-algorithm
#10
Nora Renz, Burcin Özdirik, Tobias Finger, Peter Vajkoczy, Andrej Trampuz
OBJECTIVE: The optimal surgical and antimicrobial treatment for intracranial infections following neurosurgery is unknown. We investigated the clinical, laboratory and microbiological characteristics of intracranial infections following neurosurgery. In addition, treatment outcome in patients treated according to a standardized algorithm was evaluated. METHODS: Consecutive patients with extradural, intradural and device-related infections following cranial neurosurgery were prospectively included...
May 11, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29755234/the-substantiation-of-the-elastic-viscoplastic-model-of-the-human-spine-for-modeling-the-correction-process-of-kyphoscoliotic-deformation
#11
Konstantin S Sergeev, Valery V Piven
Purpose: The relevance of the problem is caused by an increase in the number of spine-related diseases among children, including scoliosis. Currently, there are no methodologies for the treatment of scoliosis, which ensure an unambiguous positive result. The purpose of the article is to justify the spinal model as an elastic viscoplastic body for further mathematical modeling of the process of spine correction and search for its optimal conditions. Methodology: The leading approach to the study of this problem is the development of techniques for the surgical treatment of deformities of the vertebral column with the aid of an external fixation device for the spine, providing for a rigid connection of the elements of the apparatus with each other and with the spine...
January 2018: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29751977/dynamic-homemade-digital-external-fixators-for-proximal-interphalangeal-joint-injuries
#12
REVIEW
Aakash Chauhan, Jakub Sikora-Klak, Reid Abrams
The purpose of this article is to discuss the indications and surgical techniques of "homemade" digital external fixators constructed from easily available and inexpensive hardware (K-wires and dental rubber bands).
May 8, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29748878/clinical-and-radiological-outcome-of-gustilo-type-iii-open-distal-tibial-and-tibial-shaft-fractures-after-staged-treatment-with-posterolateral-minimally-invasive-plate-osteosynthesis-mipo-technique
#13
Xiaojian He, Chuanzhen Hu, Kaihua Zhou, Qilin Zhai, Weifeng Wen, Fugen Pan
OBJECTIVES: To evaluate the methods and the outcomes of Gustilo type III open distal tibial and tibial shaft fractures with severe anterior and medial soft-tissue injuries, treated with posterolateral minimally invasive plate osteosynthesis (MIPO) technique. METHODS: From May 2015 to May 2016, 10 patients with Gustilo type III open distal tibial and tibial shaft fractures with severe anterior and medial soft-tissue injuries (Gustilo-Anderson classification IIIA, 6; IIIB, 4) were treated with staged protocol using posterolateral minimally invasive plate osteosynthesis (MIPO) technique...
May 10, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29744649/a-comparative-biomechanical-study-on-different-fixation-techniques-in-the-management-of-transverse-metaphyseal-diaphyseal-junction-fractures-of-the-distal-humerus-in-children
#14
Allieu Kamara, Xianglu Ji, Tianjing Liu, Yu Zhan, Jianjun Li, Enbo Wang
BACKGROUND: Metaphyseal-diaphyseal junction (MDJ) fractures of the distal humerus are problematic to reduce and more susceptible to post-operative complications. This biomechanical study was designed to compare Kirschner wires (KW), lateral external fixation, and elastic stable intramedullary nails (ESIN) in simulated transverse MDJ fractures of various heights. METHOD: Sagittally oblique, transverse MDJ fractures were created in fourth-generation composite bone models at three levels: high, mid, and low fractures, respectively, and then fixed with either Kirschner wires, lateral external fixation (EF), or ESIN respectively and tested in extension, flexion, valgus, varus, internal, and external rotations...
May 9, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29743272/-in-vivo-impact-testing-on-a-lengthened-femur-with-external-fixation-a-future-option-for-the-non-invasive-monitoring-of-fracture-healing
#15
Lorenza Mattei, Francesca Di Puccio, Stefano Marchetti
Non-invasive methods for assessing fracture healing are crucial for biomedical engineers. An approach based on mechanical vibrations was tried out in the 1990s, but was soon abandoned due to insufficiently advanced technologies. The same approach is re-proposed in the present study in order to monitor the healing process of a lengthened femur with an external fixator. The pins screwed into the bone were exploited for the impact testing (IT) to excite the bone and capture its response. Transmission through the soft tissues was thus prevented, and the quality of the signals was improved...
May 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29734915/metacarpal-locked-intramedullary-nail-surgical-technique-and-preliminary-outcome-report
#16
Sunyarn Niempoog, Thanapong Waitayawinyu, Chinnakart Boonyasirikool
In surgically indicated metacarpal fractures, the ideal fixation should provide an ample stability for early rehabilitation. Damage to surrounding tissue should be minimized as well, to prevent stiffness which determine the outcomes. We have created the metacarpal locked intramedullary nail (MCLN) that allows immediate motion even in unstable fractures. This preliminary report is objected to demonstrate the surgical technique and outcomes of novel metacarpal fixation. Three surgical indicated metacarpal fractures were treated by MCLN...
June 2018: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29734020/ultrastructural-and-mechanical-changes-in-tubular-epithelial-cells-by-angiotensin-ii-and-aldosterone-as-observed-with-atomic-force-microscopy
#17
Fu-Shi Quan, Kyung Hwan Jeong, Gi-Ja Lee
Tubular epithelial cells (TECs) play an important pathophysiological role in the promotion of renal fibrosis. Quantitative analysis of the mechanical changes in TECs may be helpful in evaluating novel pharmacological strategies. Atomic force microscopy (AFM) is a common nanotechnology tool used for imaging and measuring interaction forces in biological systems. In this study, we used AFM to study ultrastructural and mechanical changes in TECs mediated by the renin-angiotensin-aldosterone system. We quantitatively analyzed changes in the mechanical properties of TECs using three extrinsic factors, namely, chemical fixation, angiotensin II (AT II), and aldosterone (AD)...
May 2, 2018: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29733990/flat-panel-detector-computed-tomography-fdct-guided-placement-of-external-ventricular-drains-using-the-brainlab-%C3%A2-headband-and-the-precalibrated-disposable-stylet-instrument-a-cadaveric-feasibility-study
#18
Julian Feulner, Stefan Lang, Thomas Buder, Tobias Struffert, Michael Buchfelder, Sebastian Brandner
BACKGROUND: The standard freehand method for the insertion of external ventricular drains (EVD) is associated with high rates of incorrect placement. The use of neuronavigation has been shown to reduce the rates of inaccurately positioned EVDs. We present a novel neuronavigation-based approach for EVD placement using flat panel detector computed tomography (FDCT) imaging. METHODS: Four cadaveric heads were used for neuronavigated placement of EVDs using the BrainLAB® reference Headband in combination with laser surface registration and the precalibrated disposable Stylet...
May 4, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29731951/advanced-computational-methods-in-bio-mechanics
#19
REVIEW
Waleed M S Al Qahtani, Mohamed I El-Anwar
A novel partnership between surgeons and machines, made possible by advances in computing and engineering technology, could overcome many of the limitations of traditional surgery. By extending surgeons' ability to plan and carry out surgical interventions more accurately and with fewer traumas, computer-integrated surgery (CIS) systems could help to improve clinical outcomes and the efficiency of healthcare delivery. CIS systems could have a similar impact on surgery to that long since realised in computer-integrated manufacturing...
April 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29727021/biomechanics-of-two-external-fixator-devices-used-in-rat-femoral-fractures
#20
Liza Osagie-Clouard, Joshua Kaufmann, Gordon Blunn, Melanie Coathup, Catherine Pendegrass, Richard Meeson, Timothy Briggs, Mehran Moazen
The use of external fixators allows for the direct investigation of newly formed interfragmentary bone, and the radiographic evaluation of the fracture. We validated the results of a finite element model with the in vitro stiffness' of two widely used external fixator devices used for in vivo analysis of fracture healing in rat femoral fractures with differing construction (Ti alloy ExFix1 and PEEK ExFix2). Rat femoral fracture fixation was modelled using two external fixators. For both constructs an osteotomy of 2...
May 4, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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