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https://www.readbyqxmd.com/read/28454184/-register-of-difficult-surgical-situations
#1
Michael Korenkov, Henning Dralle, Ernst Klar, Stefan Saad, Norbert Senninger, Jens Standop, Albrecht Stier, Martin Strik, Alexis Ulrich, Rudolf Weiner
Every surgical problem that increases the likelihood of intraoperative and postoperative complications is considered to be a difficult surgical situation. Based on this definition, Korenkov et al. proposed to classify patients according to the following intraoperative difficulty levels (I to IV): (I) ideal situation (easy to operate, no problems), (II) fairly easy/manageable/simple (some minor difficulties may occur), (III) difficult/problematic (difficult to operate; some operative techniques are considerably more difficult than others), and (IV) very difficult (every operative step is difficult/challenging)...
April 28, 2017: Zentralblatt Für Chirurgie
https://www.readbyqxmd.com/read/28454177/thulium-fiber-pumped-tunable-ho-caf-sub-2-sub-laser
#2
Michal Němec, Jan Šulc, Michal Jelínek, Václav Kubeček, Helena Jelínková, Maxim E Doroshenko, Olimkhon K Alimov, Vasilii A Konyushkin, Andrei N Nakladov, Vyatcheslav V Osiko
The paper reports the first room-temperature operation of the in-band pumped Ho:CaF<sub>2</sub> laser. A set of Ho:CaF<sub>2</sub> crystals varying in holmium concentrations (from 0.1 up to 2.5 mol. % of HoF<sub>2</sub>), synthesized using the Bridgeman technique, was used for lasing and related spectroscopy investigation. A pulsed 1.94 μm thulium fiber laser system was used for Ho:CaF<sub>2</sub> longitudinal pumping. For 1.5 mol. % of Ho:CaF<sub>2</sub>, the maximal wavelength tunability (from 2073 to 2114 nm) and output energy (1...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454043/vacuum-scanning-capillary-photoemission-microscopy
#3
S A Aseyev, A P Cherkun, B N Mironov, V V Petrunin, S V Chekalin
We demonstrate the use of a conical capillary in a scanning probe microscopy for surface analysis. The probe can measure photoemission from a substrate by transmitting photoelectrons along the capillary as a function of probe position. The technique is demonstrated on a model substrate consisting of a gold reflecting layer on a compact disc which has been illuminated by an unfocused laser beam with a wavelength 400nm, from a femtosecond laser with a beam size of 4mm. A quartz capillary with a 2-µm aperture has been used in the experiments...
April 19, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28453958/the-novel-technique-of-post-hysterectomy-vaginal-vault-prolapse-repair-apical-sling-and-neocervix-formation
#4
Dmitry Shkarupa, Nikita Kubin, Ekaterina Shapovalova, Anastasiya Zaytseva, Alexey Pisarev, Olga Staroseltseva
OBJECTIVE: We primarily aimed to evaluate the effectiveness of the novel technique: bilateral sacrospinous fixation by monofilament polypropylene apical sling combined with "neocervix" formation in surgical treatment of post - hysterectomy vaginal vault prolapse. The secondary objective was to estimate the impact of the surgery on voiding function and quality of life. STUDY DESIGN: This prospective study involved 61 women suffering from post-hysterectomy prolapse...
April 23, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28453547/a-systematic-review-of-hybrid-brain-computer-interfaces-taxonomy-and-usability-perspectives
#5
Inchul Choi, Ilsun Rhiu, Yushin Lee, Myung Hwan Yun, Chang S Nam
A new Brain-Computer Interface (BCI) technique, which is called a hybrid BCI, has recently been proposed to address the limitations of conventional single BCI system. Although some hybrid BCI studies have shown promising results, the field of hybrid BCI is still in its infancy and there is much to be done. Especially, since the hybrid BCI systems are so complicated and complex, it is difficult to understand the constituent and role of a hybrid BCI system at a glance. Also, the complicated and complex systems make it difficult to evaluate the usability of the systems...
2017: PloS One
https://www.readbyqxmd.com/read/28453512/a-reproducible-semi-automatic-method-to-quantify-the-muscle-lipid-distribution-in-clinical-3d-ct-images-of-the-thigh
#6
Alexander Mühlberg, Oleg Museyko, Jean-Denis Laredo, Klaus Engelke
Many studies use threshold-based techniques to assess in vivo the muscle, bone and adipose tissue distribution of the legs using computed tomography (CT) imaging. More advanced techniques divide the legs into subcutaneous adipose tissue (SAT), anatomical muscle (muscle tissue and adipocytes within the muscle border) and intra- and perimuscular adipose tissue. In addition, a so-called muscle density directly derived from the CT-values is often measured. We introduce a new integrated approach to quantify the muscle-lipid system (MLS) using quantitative CT in patients with sarcopenia or osteoporosis...
2017: PloS One
https://www.readbyqxmd.com/read/28453337/venous-bridge-arterial-grafting-for-thumb-replantation
#7
Eric R Wagner, Allen T Bishop, Alexander Y Shin
BACKGROUND: The purpose of this study is to describe a novel technique using an interposition vein graft for thumb replantation in these severe avulsion injuries. METHODS: From 2002 to 2012, 8 patients underwent interposition venous bridge grafting from the dorsal radial artery at the anatomic snuffbox to the ulnar digital artery of the thumb. All patients had a traumatic thumb amputation with a severe injury to the ulnar digital artery. The technique began with bony stabilization; the radial artery at the anatomic snuffbox is exposed, vein graft harvested, and microsurgical end-to-side (proximally) and end-to-end (distally) anastomoses are carried out...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28449495/laser-resection-of-pulmonary-nodule-via-uniportal-thoracoscopic-surgery
#8
Calvin S H Ng, Freddie Capili, Ze-Rui Zhao, Peter S Y Yu, Jacky Y K Ho, Rainbow W H Lau
Uniportal video-assisted thoracic surgery (VATS) lung wedge resection usually requires three devices, thoracoscope, lung retracting instrument and an endo-stapler cutter to perform the procedure. With advances in miniaturization of the thoracoscope and lung retracting instruments, a major limitation to operating through a smaller uniportal incision has become the endo-stapler. We describe the surgical technique for uniportal VATS laser lung resection which uses a much narrower laser catheter device to replace the endo-stapler for resection...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449483/epicardial-left-atrial-appendage-closure-comparison-of-surgical-techniques-in-an-ex-vivo-model
#9
Nikolas Mirow, Sebastian Vogt, Marc Irqsusi, Rainer Moosdorf, Andreas Kirschbaum
BACKGROUND: Formation of clots in the left atrial appendage (LAA) may lead to embolism and consecutive cerebral stroke. This risk is reduced by closure and resection. To address the efficacy of surgical LAA closure, resilience to pneumatic pressure was studied. Different surgical techniques were compared in an experimental model. METHODS: From freshly slaughtered pigs cardiopulmonary preparations were taken. The left atrium was clamped airtight and the LAA was cannulated...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449475/a-non-randomized-retrospective-observational-study-on-the-subcutaneous-esophageal-reconstruction-after-esophagectomy-is-it-feasible-in-high-risk-patients
#10
Jae Ho Chung, Sung Ho Lee, Eunjue Yi, Jae Seung Jung, Jung Wook Han, Tae Sik Kim, Ho Sung Son, Kwang Taik Kim
BACKGROUND: Esophageal reconstruction after esophagectomy is a complex procedure with high morbidity and mortality. Anastomotic leakage is more severe and frequent in patients with preoperative comorbidities and may present with septic conditions. Considering the possibility of an easier management of such cases, we evaluated the safety and feasibility of subcutaneous esophageal reconstruction in patients with high operative risks. METHODS: We performed a non-randomized retrospective observational study on the 75 (subcutaneous: 21, intrathoracic: 54) esophageal cancer patients who underwent esophageal reconstruction either through subcutaneous or intrathoracic route between January 2003 and February 2015...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449390/partial-tibial-nerve-transfer-to-tibialis-anterior-for-traumatic-peroneal-nerve-palsy
#11
Scott Ferris, Simon J Maciburko
BACKGROUND: Partial tibial nerve transfer to the motor branches of tibialis anterior is an emerging reconstructive technique for the treatment of traumatic common peroneal nerve (CPN) injury; however, few papers in the literature describe clinical outcomes. METHODS: A prospective single-surgeon series of nine consecutive patients who underwent partial tibial nerve transfers to the motor branches of tibialis anterior for traumatic CPN injuries between 2008 and 2014...
April 27, 2017: Microsurgery
https://www.readbyqxmd.com/read/28449032/comparing-outcomes-and-cost-of-3-surgical-treatments-for-sagittal-synostosis-a-retrospective-study-including-procedure-related-cost-analysis
#12
Sarah T Garber, Michael Karsy, John R W Kestle, Faizi Siddiqi, Stephen P Spanos, Jay Riva-Cambrin
BACKGROUND: Neurosurgical techniques for repair of sagittal synostosis include total cranial vault (TCV) reconstruction, open sagittal strip (OSS) craniectomy, and endoscopic strip (ES) craniectomy. OBJECTIVE: To evaluate outcomes and cost associated with these 3 techniques. METHODS: Via retrospective chart review with waiver of informed consent , the last consecutive 100 patients with sagittal synostosis who underwent each of the 3 surgical correction techniques before June 30, 2013, were identified...
April 25, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28448445/horizontal-directional-drilling-length-detection-technology-while-drilling-based-on-bi-electro-magnetic-sensing
#13
Yudan Wang, Guojun Wen, Han Chen
The drilling length is an important parameter in the process of horizontal directional drilling (HDD) exploration and recovery, but there has been a lack of accurate, automatically obtained statistics regarding this parameter. Herein, a technique for real-time HDD length detection and a management system based on the electromagnetic detection method with a microprocessor and two magnetoresistive sensors employing the software LabVIEW are proposed. The basic principle is to detect the change in the magnetic-field strength near a current coil while the drill stem and drill-stem joint successively pass through the current coil forward or backward...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448422/iterative-reconstruction-designed-for-brain-ct-a-correlative-study-with-filtered-back-projection-for-the-diagnosis-of-acute-ischemic-stroke
#14
Yuji Iyama, Takeshi Nakaura, Seitaro Oda, Masafumi Kidoh, Daisuke Utsunomiya, Morikatsu Yoshida, Hideaki Yuki, Kenichiro Hirata, Yoshinori Funama, Kazunori Harada, Kazuo Awai, Toshinori Hirai, Yasuyuki Yamashita
OBJECTIVES: The objective of this study is to evaluate the usefulness of iterative model reconstruction designed for brain computed tomography (CT) (IMR-Neuro) for the diagnosis of acute ischemic stroke. METHODS: This retrospective study included 20 patients with acute middle cerebral artery infarction who have undergone brain CT and 20 nonstroke patients (control). We reconstructed axial images with filtered back projection (FBP) and IMR-Neuro (slice thickness, 1 and 5 mm)...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448203/systematic-review-and-meta-analysis-of-randomized-controlled-trials-evaluating-prophylactic-intra-operative-wound-irrigation-for-the-prevention-of-surgical-site-infections
#15
Stijn W de Jonge, Quirine J J Boldingh, Joseph S Solomkin, Benedetta Allegranzi, Matthias Egger, E Patchen Dellinger, Marja A Boermeester
BACKGROUND: Surgical site infections (SSIs) are one of the most common hospital-acquired infections. To reduce SSIs, prophylactic intra-operative wound irrigation (pIOWI) has been advocated, although the results to date are equivocal. To develop recommendations for the new World Health Organization (WHO) SSI prevention guidelines, a systematic literature review and a meta-analysis were conducted on the effectiveness of pIOWI using different agents as a means of reducing SSI. METHODS: The PUBMED, Embase, CENTRAL, CINAHL, and WHO databases were searched...
April 27, 2017: Surgical Infections
https://www.readbyqxmd.com/read/28448122/iodine-pseudohalogen-ionic-liquid-based-electrolytes-for-quasi-solid-state-dye-sensitized-solar-cells
#16
Annkatrin Lennert, Michelle Sternberg, Karsten Meyer, Rubén D Costa, Dirk M Guldi
In the current work, novel symmetrically alkyl-substituted imidazolium-based ionic liquids have been synthesized featuring either iodide (I(-)) or selenocyanate (SeCN(-)) as counteranions. Physicochemical assays based on spectroscopy and electrochemistry techniques have been performed to identify the best ionic liquid for application as electrolytes in quasi-solid-state dye-sensitized solar cells (qssDSSC). The latter were mixed with additives such as 4-tert-butylpyridine (4tbpy) and guanidinium thiocyanate (GuSCN) to optimize electrode surface coverage, ionic diffusion, and dye regeneration...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28448040/determination-of-high-affinity-antibody-antigen-binding-kinetics-using-four-biosensor-platforms
#17
Danlin Yang, Ajit Singh, Helen Wu, Rachel Kroe-Barrett
Label-free optical biosensors are powerful tools in drug discovery for the characterization of biomolecular interactions. In this study, we describe the use of four routinely used biosensor platforms in our laboratory to evaluate the binding affinity and kinetics of ten high-affinity monoclonal antibodies (mAbs) against human proprotein convertase subtilisin kexin type 9 (PCSK9). While both Biacore T100 and ProteOn XPR36 are derived from the well-established Surface Plasmon Resonance (SPR) technology, the former has four flow cells connected by serial flow configuration, whereas the latter presents 36 reaction spots in parallel through an improvised 6 x 6 crisscross microfluidic channel configuration...
April 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447978/high-resolution-thermal-micro-imaging-using-europium-chelate-luminescent-coatings
#18
Timothy M Benseman, Yang Hao, Vitalii K Vlasko-Vlasov, Ulrich Welp, Alexei E Koshelev, Wai-Kwong Kwok, Ralu Divan, Courtney Keiser, Chiharu Watanabe, Kazuo Kadowaki
Micro-electronic devices often undergo significant self-heating when biased to their typical operating conditions. This paper describes a convenient optical micro-imaging technique which can be used to map and quantify such behavior. Europium thenoyltrifluoroacetonate (EuTFC) has a 612 nm luminescence line whose activation efficiency drops strongly with increasing temperature, due to T-dependent interactions between the Eu(3+) ion and the organic chelating compound. This material may be readily coated on to a sample surface by thermal sublimation in vacuum...
April 16, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447967/management-of-colovesical-and-colovaginal-diverticular-fistulas-our-experience-and-literature-reviewed
#19
Tommaso Marcucci, Sandro Giannessi, Francesco Giudici, Sara Riccadonna, Agnese Gori, Francesco Tonelli
AIM: This study aims evaluate the effectiveness of various surgical techniques in treating diverticular fistulas, and the safety and efficacy of the laparoscopic procedure comparing our results with those of the literature. MATERIAL OF STUDY: This was a prospective and uncontrolled study performed at a general surgery units. Between 2005 and 2011, 16 patients (11 men, 5 women) underwent surgery for diverticular fistulas. The mean age was 70.2 (range, 35-87) years...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/28447928/evaluation-of-three-dimensional-versus-conventional-laparoscopy-for-kidney-transplant-procedures-in-a-human-cadaveric-model
#20
Bulang He, Lingjun Mou, Ronald De Roo, Gabrielle C Musk, Jeffrey M Hamdorf
OBJECTIVES: There are increased reports that kidney transplant can be performed by laparoscopic surgery. The further development of this technique could revolutionize human kidney transplant surgery. However, laparoscopic kidney transplant demands a high level of skill for vascular anastomoses. The emerging technology of the three-dimensional, high-definition laparoscopic system may facilitate the application of this technique. Therefore, in this study, we evaluated this system in performing kidney transplant surgery versus the two-dimensional laparoscopic system...
April 27, 2017: Experimental and Clinical Transplantation
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