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https://www.readbyqxmd.com/read/27921372/a-fuzzy-neural-network-sliding-mode-controller-for-vibration-suppression-in-robotically-assisted-minimally-invasive-surgery
#1
Hongqiang Sang, Chenghao Yang, Fen Liu, Jintian Yun, Guoguang Jin
BACKGROUND: It is very important for robotically assisted minimally invasive surgery to achieve a high-precision and smooth motion control. However, the surgical instrument tip will exhibit vibration caused by nonlinear friction and unmodeled dynamics, especially when the surgical robot system is attempting low-speed, fine motion. METHODS: A fuzzy neural network sliding mode controller (FNNSMC) is proposed to suppress vibration of the surgical robotic system. Nonlinear friction and modeling uncertainties are compensated by a Stribeck model, a radial basis function (RBF) neural network and a fuzzy system, respectively...
December 2016: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/27918346/electrical-stimulation-for-seizure-induction-and-functional-mapping-in-stereoelectroencephalography
#2
Agnès Trébuchon, Patrick Chauvel
The challenge in epilepsy surgery is to remove the epileptogenic zone without compromising postoperative function. Electrical stimulation (ES) was developed to identify with greater anatomical and physiological precision cortical structures essential to language and motor function. Because the language network is widely distributed in the left (dominant) hemisphere, and often varies among patients, brain mapping should delineate eloquent areas at the individual level. Although ES for language is commonly performed during a presurgical investigation, the procedure remains nonstandardized among centers, and differences between grids and intracerebral depth electrodes (stereoelectroencephalography) should be taken into account when comparing results from different series...
December 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27912032/pain-input-impairs-recovery-after-spinal-cord-injury-treatment-with-lidocaine
#3
Joel D Turtle, Misty M Strain, Miriam Aceves, Yung-Jen Huang, Joshua A Reynolds, Michelle A Hook, James W Grau
More than 90% of spinal cord injuries are caused by traumatic accidents and are often associated with other tissue damage (polytrauma) that can provide a source of continued pain input during recovery. In a clinically relevant spinal cord contusion injury model, prior work has shown that noxious stimulation at an intensity that engages pain (C) fibers soon after injury augments secondary injury and impairs functional recovery. Noxious input increases the expression of pro-inflammatory cytokines (interleukin 1β and 18), cellular signals associated with cell death (caspase 3 and 8), and physiological signs of hemorrhage...
December 2, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27906934/can-unilateral-kyphoplasty-replace-bilateral-kyphoplasty-in-treatment-of-osteoporotic-vertebral-compression-fractures-a-systematic-review-and-meta-analysis
#4
Han Sun, Pei-Pei Lu, Yi-Jie Liu, Xu Yang, Ping-Hui Zhou, Xiao-Feng Shen, Si-Wei Sun, Huilin Yang
BACKGROUND: Kyphoplasty has been proven to be an efficient method to relieve patient suffering from osteoporotic vertebral compression fractures (OVCFs). Because of its technological superiority, unilateral kyphoplasty consumes less operative time and bone cement than traditional bilateral kyphoplasty. However, there is controversy about which method is most efficient in the treatment of OVCFs. Thus, an overall analysis should be performed to shed light on the facts corroborating both procedures...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27895411/reoperation-in-an-adult-female-with-right-sided-hirschsprung-s-disease-complicated-by-refractory-hypertension-and-cough
#5
Zhi-Jian Wei, Lei Huang, A-Man Xu
Hirschsprung's disease (HD) is an intestinal malformation caused by the innate absence of ganglion cells in the neural plexus of the colorectal wall, and is most common in male infants. It is rare in adult, and is usually left-sided. Herein we reported based on the CARE guidelines a case of a 47-year-old adult female suffering from "right-sided" HD complicated by refractory hypertension and cough. The patient with a history of cesarean section and with digestive unfitness (abdominal pain, distention, and constipation) only since 20 years old had recurrence of HD after initial surgery due to the incomplete removal of the HD-affected bowel based on a diagnosis of "chronic ileus", leading to the relapse of the digestive symptoms and the emergence of some intractable circulatory and respiratory complications which could be hardly controlled by conservative treatment...
November 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27888084/are-locked-facets-a-contraindication-for-extreme-lateral-interbody-fusion
#6
Rodrigo Navarro-Ramirez, Gernot Lang, Yu Moriguchi, Eric Elowitz, Jose Alfredo Corredor, Mauricio J Avila, Alberto Gotfryd, Marjan Alimi, Lena Gandevia, Roger Härtl
BACKGROUND: Extreme lateral interbody fusion (ELIF) has gained popularity as a minimally invasive treatment allowing for indirect decompression of neural elements. However, evidence regarding the influence of facet degeneration (FD) and facet tropism (FT) towards indirect decompression is lacking. The aim of the study was to evaluate whether indirect decompression is impaired by FD and FT in patients undergoing ELIF. METHODS: 37 patients undergoing ELIF were included in a retrospective study...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27885540/automatic-abdominal-multi-organ-segmentation-using-deep-convolutional-neural-network-and-time-implicit-level-sets
#7
Peijun Hu, Fa Wu, Jialin Peng, Yuanyuan Bao, Feng Chen, Dexing Kong
PURPOSE: Multi-organ segmentation from CT images is an essential step for computer-aided diagnosis and surgery planning. However, manual delineation of the organs by radiologists is tedious, time-consuming and poorly reproducible. Therefore, we propose a fully automatic method for the segmentation of multiple organs from three-dimensional abdominal CT images. METHODS: The proposed method employs deep fully convolutional neural networks (CNNs) for organ detection and segmentation, which is further refined by a time-implicit multi-phase evolution method...
November 24, 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/27882269/concomitant-lumbar-stenosis-and-aortic-pseudoaneurysm-a-case-report
#8
Christoph Fuchs, Thomas E Niemeier, William E Neway, Sakthivel Rajan Rajaram Manoharan
Aortic pseudoaneurysm can create a constellation of symptoms that can mimic lumbar back pain. There are rare but well-documented reports of aortic pathology (aneurysms, pseudoaneurysms, and chronic contained aneurysm ruptures) eroding into the vertebral column causing neural compression. We report a case of a rapidly progressive aortic pseudoaneurysm in a patient with pre-existing lumbar spine pathology which had the potential for catastrophic intraoperative bleeding during a minimally invasive surgery (MIS) using the transforaminal lumbar interbody fusion (TLIF) technique...
October 9, 2016: Curēus
https://www.readbyqxmd.com/read/27882149/combination-of-endogenous-neural-stem-cell-mobilization-and-lithium-chloride-treatment-for-hydrocephalus-following-intraventricular-hemorrhage
#9
Qiang Yuan, Xing-Yao Bu, Zhao-Yue Yan, Xian-Zhi Liu, Zhen-Yu Wei, Chun-Xiao Ma, Ming-Qi Qu
As there are multiple factors causing hydrocephalus subsequent to intraventricular hemorrhage (IVH), it is difficult to achieve the best treatment effect using a single drug alone. In the present study, the protective effect of combination treatment with granulocyte-colony stimulating factor (G-CSF) and lithium chloride against hydrocephalus after IVH was investigated. A total of 130 adult male Sprague-Dawley rats were divided into five groups, including the IVH control, G-CSF treatment, lithium chloride treatment, combination treatment and sham surgery groups...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27880735/automatic-3d-liver-segmentation-based-on-deep-learning-and-globally-optimized-surface-evolution
#10
Peijun Hu, Fa Wu, Jialin Peng, Ping Liang, Dexing Kong
The detection and delineation of the liver from abdominal 3D computed tomography (CT) images are fundamental tasks in computer-assisted liver surgery planning. However, automatic and accurate segmentation, especially liver detection, remains challenging due to complex backgrounds, ambiguous boundaries, heterogeneous appearances and highly varied shapes of the liver. To address these difficulties, we propose an automatic segmentation framework based on 3D convolutional neural network (CNN) and globally optimized surface evolution...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27877009/characteristics-of-gastric-cancer-recurrence-five-or-more-years-after-curative-gastrectomy
#11
Chang-Hyun Shin, Woo-Yong Lee, Seung-Woo Hong, Yeo-Goo Chang
OBJECTIVE: To investigate the characteristics of recurrences that occurred 5 or more years after curative resection for gastric cancer. METHODS: We analyzed recurrences among 1,299 patients with gastric cancer who underwent curative operations at the Department of Surgery, Inje University Seoul Paik Hospital between September 1998 and December 2002. Recurrences were classified as within 2 years (early), 2-5 years (intermediate), and more than 5 years (late) after gastrectomy...
October 2016: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/27871490/predictive-models-for-mortality-after-ruptured-aortic-aneurysm-repair-do-not-predict-futility-and-are-not-useful-for-clinical-decision-making
#12
Patrick C Thompson, Ronald L Dalman, E John Harris, Venita Chandra, Jason T Lee, Matthew W Mell
OBJECTIVE: The clinical decision-making utility of scoring algorithms for predicting mortality after ruptured abdominal aortic aneurysms (rAAAs) remains unknown. We sought to determine the clinical utility of the algorithms compared with our clinical decision making and outcomes for management of rAAA during a 10-year period. METHODS: Patients admitted with a diagnosis rAAA at a large university hospital were identified from 2005 to 2014. The Glasgow Aneurysm Score, Hardman Index, Vancouver Score, Edinburgh Ruptured Aneurysm Score, University of Washington Ruptured Aneurysm Score, Vascular Study Group of New England rAAA Risk Score, and the Artificial Neural Network Score were analyzed for accuracy in predicting mortality...
December 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27867862/intermittent-neural-monitoring-of-the-recurrent-laryngeal-nerve-in-surgery-for-recurrent-goiter
#13
REVIEW
Beata Wojtczak, Marcin Barczyński
Reoperative thyroid surgery is still challenging even for skilled surgeons, and is associated with a higher incidence of complications, such as hypoparathyroidism and recurrent laryngeal nerve (RLN) palsy. Displacement of the RLN, scar tissue from previous neck surgery and difficulty in maintaining good hemostasis are risk factors in reoperations. The prevalence of RLN injury in reoperative thyroid surgery ranges as high as 12.5% for transient injury and up to 3.8% for permanent injury. Bilateral paresis can also occur during reoperations, and is a dangerous complication influencing the quality of life, sometimes requiring tracheostomy...
October 2016: Gland Surgery
https://www.readbyqxmd.com/read/27867861/intraoperative-neural-monitoring-in-thyroid-surgery-lessons-learned-from-animal-studies
#14
REVIEW
Che-Wei Wu, Gregory W Randolph, I-Cheng Lu, Pi-Ying Chang, Yi-Ting Chen, Pao-Chu Hun, Yi-Chu Lin, Gianlorenzo Dionigi, Feng-Yu Chiang
Recurrent laryngeal nerve (RLN) injury remains a significant morbidity associated with thyroid and parathyroid surgery. In the past decade, surgeons have increasingly used intraoperative neural monitoring (IONM) as an adjunct technique for localizing and identifying the RLN, detecting RLN injury, and predicting the outcome of vocal cord function. In recent years, many animal studies have investigated common pitfalls and new applications of IONM. For example, the use of IONM technology in animal models has proven valuable in studies of the electrophysiology of RLN injury...
October 2016: Gland Surgery
https://www.readbyqxmd.com/read/27867131/neuronavigation-based-on-track-density-image-extracted-from-deterministic-high-definition-fiber-tractography-a-case-report
#15
Peng-Hu Wei, Fei Cong, Ge Chen, Ming-Chu Li, Xin-Guang Yu, Yu-Hai Bao
BACKGROUND: Diffusion tensor imaging(DTI)-based navigation is unable to resolve crossing fibers or to determine with accuracy the fanning, origin, and termination of fibers. It is important to improve the accuracy of localizing white matter fibers for improved surgical approaches. We propose a solution to this problem using navigation based on track density imaging(TDI)extracted from high definition fiber tractography(HDFT). CASE DESCRIPTION: A 28-year-old asymptomatic female patient with a left-lateral ventricle meningioma was enrolled in the present study...
November 17, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27866303/anesthetic-technique-and-cancer-recurrence-in-oncologic-surgery-unraveling-the-puzzle
#16
Ryungsa Kim
Surgery/anesthetic technique-stimulated immunosuppression in the perioperative period might cause an increase in cancer-related mortality. Whether anesthetic technique can affect the outcomes of cancer patients remains inconclusive. This review discusses data from the available literature on anesthetic techniques applied in oncologic surgery, the long-term outcomes of anesthetic technique, and their relation to survival and cancer recurrence. Searches of the PubMed database up to June 30, 2016, were conducted to identify publications with the terms "anesthetic technique and cancer recurrence," "regional anesthesia and cancer recurrence," "local anesthesia and cancer recurrence," "anesthetic technique and immunosuppression," and "anesthetic technique and oncologic surgery...
November 19, 2016: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/27863864/laminin-5-and-insulin-like-growth-factor-ii-mrna-binding-protein-3-imp3-expression-in-preoperative-biopsy-specimens-from-oral-cancer-patients-their-role-in-neural-spread-risk-and-survival-stratification
#17
Achille Tarsitano, Sofia Asioli, Luca Morandi, Valentina Monti, Alberto Righi, Antonio Maria Morselli Labate, Elena Nardi, Maria Pia Foschini, Claudio Marchetti
Perineural invasion (PNI) hinders the ability to establish local control of oral squamous cell carcinoma (OSCC). To date, PNI can be evaluated only in surgical specimens and not in preoperative biopsy material, rendering timely therapeutic planning impossible. Insulin-like growth factor-II mRNA binding protein-3 (IMP3) expression appears to be of diagnostic and prognostic utility for many solid tumours, and laminin-5 expression in surgical specimens has been identified as a valid predictor of neural spread of head-and-neck neoplasms...
July 21, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27862168/late-onset-bulky-naevocytoma-of-the-perineum-masquerading-as-a-malignant-melanoma
#18
J W Huh, J Yoo, M S Kim, K H Choi, M S Jue, H J Park
Bulky naevocytoma of the perineum is a very rare variant of giant congenital melanocytic naevus (GCMN). It presents as a bulky naevocytic tumour in the perineal region with characteristic histological findings, such as extensive areas with a neural appearance called 'lames foliacees', formation of a pseudofollicular structure and extension of naevus cells between collagen bundles in a row called 'Indian-file' pattern. We report a case of late-onset bulky naevocytoma of the perineum in a 13-year-old girl. The patient presented with two bulky, pedunculated, heavily pigmented masses in the vulvar area that developed in a pre-existing GCMN lesion, which began around puberty and caused severe gait disturbance...
November 15, 2016: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/27861939/changes-in-electromyographic-amplitudes-but-not-latencies-occur-with-endotracheal-tube-malpositioning-during-intraoperative-monitoring-for-thyroid-surgery-implications-for-guidelines
#19
Samuel R Barber, Whitney Liddy, Natalia Kyriazidis, Matteo Cinquepalmi, Brian M Lin, Rahul Modi, Stephanie Patricio, Dipti Kamani, Carlo Belotti, Sadhana Mahamad, Bradley Lawson, Gregory W Randolph
OBJECTIVES/HYPOTHESIS: During intraoperative neural monitoring (IONM) in thyroid and parathyroid surgery, endotracheal (ET) tube migration can result in a decrease in vocalis electromyographic (EMG) amplitude without a concordant latency elevation during stimulation of the recurrent laryngeal nerve (RLN). STUDY DESIGN: Retrospective review. METHODS: Data were reviewed retrospectively for thyroid and parathyroid surgery patients with IONM of the laryngeal nerves from January 2015 to December 2015...
November 16, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27861327/spinal-laser-interstitial-thermal-therapy-a-novel-alternative-to-surgery-for-metastatic-epidural-spinal-cord-compression
#20
Claudio E Tatsui, Sun-Ho Lee, Behrang Amini, Ganesh Rao, Dima Suki, Marilou Oro, Paul D Brown, Amol J Ghia, Shreyas Bhavsar, Keyuri Popat, Laurence D Rhines, R Jason Stafford, Jing Li
BACKGROUND: Although surgery followed by radiation effectively treats metastatic epidural compression, the ideal surgical approach should enable fast recovery and rapid institution of radiation and systemic therapy directed at the primary tumor. OBJECTIVE: To assess spinal laser interstitial thermotherapy (SLITT) as an alternative to surgery monitored in real time by thermal magnetic resonance (MR) images. METHODS: Patients referred for spinal metastasis without motor deficits underwent MR-guided SLITT, followed by stereotactic radiosurgery...
December 2016: Neurosurgery
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