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Mri and anesthesia

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https://www.readbyqxmd.com/read/28094665/fdg-pet-reproducibility-in-tumor-bearing-mice-comparing-a-traditional-suv-approach-with-a-tumor-to-brain-tissue-ratio-approach
#1
Morten Busk, Ole L Munk, Steen Jakobsen, Jørgen Frøkiær, Jens Overgaard, Michael R Horsman
BACKGROUND: Current [F-18]-fluorodeoxyglucose positron emission tomography (FDG-PET) procedures in tumor-bearing mice typically includes fasting, anesthesia, and standardized uptake value (SUV)-based quantification. Such procedures may be inappropriate for prolonged multiscan experiments. We hypothesize that normalization of tumor FDG retention relative to a suitable reference tissue may improve accuracy as this method may be less susceptible to uncontrollable day-to-day changes in blood glucose levels, physical activity, or unnoticed imperfect tail vein injections...
January 17, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28093564/postoperative-conversion-disorder-presenting-as-inspiratory-stridor-and-hemiparesis-in-a-pediatric-patient
#2
Erik J Nelson, Jennifer Y Wu
BACKGROUND Postoperative conversion disorder is rare and has been reported. The diagnosis is usually made after all major organic causes have been ruled out. CASE REPORT We describe a case of a 13-year-old female who presented in the post-anesthesia care unit with acute-onset inspiratory stridor and unresponsiveness to verbal or painful stimuli after receiving a general anesthetic for upper endoscopy. Later in the post-anesthesia care unit, she presented with acute-onset right hemiplegia and sensory loss. She was first evaluated for causes of her stridor and unresponsiveness...
January 17, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28091734/level-of-conus-medullaris-termination-in-adult-population-analyzed-by-kinetic-magnetic-resonance-imaging
#3
An Liu, Kaixiang Yang, Daling Wang, Changqing Li, Zhiwei Ren, Shigui Yan, Zorica Buser, Jeffrey C Wang
PURPOSE: To investigate the change of conus medullaris termination (CMT) level in neutral, flexion and extension positions and to analyze the effects of age and gender on the CMT level. METHODS: The midline sagittal T2-weighted kinetic magnetic resonance imaging (kMRI) study of 585 patients was retrospectively reviewed to identify the level of CMT. All patients were in an upright position. A straight line perpendicular to the long axis of the cord was drawn from the tip of the cord and then subtended to the adjacent vertebra or disk space...
January 16, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28088934/clinical-diagnosis-and-treatment-of-intraorbital-wooden-foreign-bodies
#4
Jia Li, Li-Ping Zhou, Jing Jin, Hong-Feng Yuan
PURPOSE: The intraorbital wooden foreign body is often misdiagnosed or missed on computed tomog- raphy (CT) scan, due to the invisible or unclear images. The residual foreign bodies often occur during surgical removal. The clinical manifestations, imaging features and treatment of intraorbital wooden foreign bodies were discussed in this study. METHOD: We retrospectively analyzed 14 cases of intraorbital wooden foreign bodies managed at our hospital between January 2007 and May 2015...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28056870/anti-n-methyl-d-aspartate-receptor-nmdar-antibody-encephalitis-presents-in-atypical-types-and-coexists-with-neuromyelitis-optica-spectrum-disorder-or-neurosyphilis
#5
Kaiyu Qin, Wenqing Wu, Yuming Huang, Dongmei Xu, Lei Zhang, Bowen Zheng, Meijuan Jiang, Cheng Kou, Junhua Gao, Wurong Li, Jinglin Zhang, Sumei Wang, Yanfei Luan, Chaoling Yan, Dan Xu, Xinmei Zheng
BACKGROUND: Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a clinically heterogeneous disorder characterized by epileptic seizures, psychosis, dyskinesia, consciousness impairments, and autonomic instability. Symptoms are always various. Sometimes it presents in milder or incomplete forms. We report 4 cases of anti-NMDAR encephalitis with incomplete forms, 3 cases of which were accompanied by neuromyelitis optica spectrum disorder or neurosyphilis respectively. CASE PRESENTATION: A 33-year-old man presented with dysarthria, movement disorder and occasional seizures...
January 5, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28052210/joubert-plus-syndrome-with-self-mutilation-a-case-report
#6
Yousr N Mowafy, Nadia A Wahba, Aly A Sharaf
BACKGROUND: Joubert syndrome is a very rare condition with dismal prognosis. It is characterized by several abnormalities including molar tooth sign on MRI. When coupled with mega cisterna magna- a feature of the Dandy Walker syndrome- it is categorized as Joubert plus syndrome. CASE REPORT: A 16 month old male child with Joubert syndrome was referred to the Pediatric Dentistry Department Clinic, Faculty of Dentistry Alexandria University, complaining of severe tongue and lower lip injury due to self-mutilation...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28050702/selective-induction-of-il-1%C3%AE-after-a-brief-isoflurane-anesthetic-in-children-undergoing-mri-examination
#7
Emmett E Whitaker, Fievos L Christofi, Kristen M Quinn, Brianne Z Wiemann, Jason C Xia, Joseph D Tobias, Bruno Bissonnette
PURPOSE: To determine if isoflurane anesthesia without surgery causes systemic inflammation in children. Inflammation is targeted as responsible for the development of many neurologic pathologies. The effect will be evaluated by measuring serum cytokine levels before and after isoflurane anesthesia. The possible neurotoxic effect of anesthetic agents is a concern in pediatric anesthesia. Questions remain as to the true effects of anesthesia alone on systemic inflammation. The current study assesses systemic inflammatory response to general anesthesia in children not exposed to surgical stress...
January 3, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28046858/su-f-i-68-longitudinal-neurochemical-changes-on-rat-prefrontal-cortex-of-single-prolonged-stress-model-by-using-proton-magnetic-resonance-spectroscopy-at-9-4t
#8
S-I Lim, K-H Song, C-H Yoo, D-C Woo, B-Y Choe
PURPOSE: Single prolonged stress (SPS) is an animal model of posttraumatic stress disorder (PTSD). However, it has not been known how PTSD develops from the first exposure to traumatic events and neurochemical differences between acute/single stress and PTSD-triggering stress. Therefore, the object of this study is to determine time-dependent neurochemical changes in prefrontal cortex (PFC) of rats using in vivo proton magnetic resonance spectroscopy (1H-MRS). METHODS: Male Sprague-Dawley rats (n=14; body weight=200-220g) were used...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28036318/unanticipated-compression-of-the-trachea-in-a-5-month-old-undergoing-an-mri-for-evaluation-of-neurofibromatosis
#9
Uduak Ursula Williams, Acsa M Zavala, Antoinette Van Meter, Elizabeth Rebello, Jens Tan, Pascal Owusu-Agyemang
Neurofibromatosis type 1 is an autosomal-dominant disorder with the tendency toward the formation of tumors. Plexiform neurofibromas are the most common type of tumors seen in neurofibromatosis type 1. Approximately 50% occur in the head and neck region with a 5% incidence of airway involvement. We describe the case of a 5 month old with a plexiform neurofibroma of the neck who developed complete airway obstruction on induction of anesthesia. Magnetic resonance imaging revealed a skull base neurofibroma extending to the hypopharynx and resulting in deviation of the airway...
January 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28032008/effects-of-isoflurane-anesthesia-on-resting-state-fmri-signals-and-functional-connectivity-within-primary-somatosensory-cortex-of-monkeys
#10
Tung-Lin Wu, Arabinda Mishra, Feng Wang, Pai-Feng Yang, John C Gore, Li Min Chen
INTRODUCTION: Correlated low-frequency fluctuations of resting-state functional magnetic resonance imaging (rsfMRI) signals have been widely used for inferring intrinsic brain functional connectivity (FC). In animal studies, accurate estimate of anesthetic effects on rsfMRI signals is demanded for reliable interpretations of FC changes. We have previously shown that inter-regional FC can reliably delineate local millimeter-scale circuits within digit representations of primary somatosensory cortex (S1) subregions (areas 3a, 3b, and 1) in monkeys under isoflurane anesthesia...
December 2016: Brain and Behavior
https://www.readbyqxmd.com/read/28030956/effects-of-long-duration-administration-of-1-isoflurane-on-resting-cerebral-blood-flow-and-default-mode-network-in-macaque-monkeys
#11
Chunxia Li, Xiaodong Zhang
Isoflurane is an inhalational anesthetic widely used in medical procedures or biomedical researches. The duration of anesthesia administration varies from minutes to hours. It is known isoflurane has dose-dependent effects on brain functionality and physiology and long-duration anesthesia administration could cause neurocognitive decline in animals and humans. However, the duration effect of isoflurane on the brain physiology and functionality still remains poorly understood. In the present study, cerebral blood flow (CBF) and functional connectivity of adult rhesus monkeys (maintained with 1% isoflurane for four hours) was examined using MRI...
December 28, 2016: Brain Connectivity
https://www.readbyqxmd.com/read/28028573/diffusion-tensor-imaging-and-tractography-of-the-sciatic-nerve-assessment-of-fractional-anisotropy-and-apparent-diffusion-coefficient-values-relative-to-the-piriformis-muscle-a-preliminary-study
#12
Keizo Wada, Takuya Hashimoto, Ryo Miyagi, Toshinori Sakai, Koichi Sairyo
OBJECTIVE: Piriformis muscle syndrome (PMS) is underdiagnosed. To evaluate the potential of diffusion tensor imaging and diffusion tensor tractography as innovative tools for the diagnosis of PMS by functional assessment of the sciatic nerve, the aims of this study are to assess the reproducibility and to evaluate the changes in the parameters at levels proximal and distal to the piriformis. MATERIALS AND METHODS: Fractional anisotropy (FA) and the apparent diffusion coefficient (ADC) of the sciatic nerve at three levels were quantified twice each by two examiners using the fiber-tracking method...
December 27, 2016: Skeletal Radiology
https://www.readbyqxmd.com/read/28012127/fluorescein-sodium-guided-resection-of-cerebral-metastases-an-update
#13
Julius Höhne, Christoph Hohenberger, Martin Proescholdt, Markus J Riemenschneider, Christina Wendl, Alexander Brawanski, Karl-Michael Schebesch
BACKGROUND: Cerebral metastasis (CM) is the most common malignancy affecting the brain. In patients eligible for surgery, complete tumor removal is the most important predictor of overall survival and neurological outcome. The emergence of surgical microscopes fitted with a fluorescein-specific filter have facilitated fluorescein-guided microsurgery and identification of tumor tissue. In 2012, we started evaluating fluorescein (FL) with the dedicated microscope filter in cerebral metastases (CM)...
February 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28008696/sub-tenon-s-injection-in-equine-cadaver-eyes-mri-visualization-of-anesthetic-fluid-distribution-and-comparison-of-two-different-volumes
#14
Silvia Stadler, Matthias Dennler, Udo Hetzel, Francesca Del Chicca, Sèamus Hoey, Bernhard M Spiess, Katrin Voelter, Simon A Pot
OBJECTIVE: To compare the localization and distribution of two different anesthetic fluid volumes around equine cadaver eyes to determine an appropriate volume for a single sub-Tenon's injection in horses. PROCEDURE: A single sub-Tenon's injection of 2% lidocaine was performed in 10 equine cadaver heads (20 eyes) using two different volumes (7 mL on one side and 10 mL on the opposite side). The posterior circular distribution of the anesthetic was quantified in sagittal, dorsal, and transverse MRI (T2W-TSE) sequences and evaluated independently by three board-certified radiologists...
December 23, 2016: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28008429/applications-of-patient-specific-3d-printing-in-medicine
#15
Martin Heller, Heide-Katharina Bauer, Elisabeth Goetze, Matthias Gielisch, Klaus E Roth, Philipp Drees, Gerrit S Maier, Bernhard Dorweiler, Ahmed Ghazy, Meik Neufurth, Werner E G Müller, Heinz C Schröder, Xiaohong Wang, Christian-Friedrich Vahl, Bilal Al-Nawas
Already three decades ago, the potential of medical 3D printing (3DP) or rapid prototyping for improved patient treatment began to be recognized. Since then, more and more medical indications in different surgical disciplines have been improved by using this new technique. Numerous examples have demonstrated the enormous benefit of 3DP in the medical care of patients by, for example, planning complex surgical interventions preoperatively, reducing implantation steps and anesthesia times, and helping with intraoperative orientation...
2016: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/27959665/retrospective-analysis-of-the-safety-and-cost-implications-of-pediatric-contrast-enhanced-ultrasound-at-a-single-center
#16
Gibran T Yusuf, Maria E Sellars, Annamaria Deganello, David O Cosgrove, Paul S Sidhu
OBJECTIVE: Because of concern over medical ionizing radiation exposure of children, contrast-enhanced ultrasound (CEUS) has generated interest as an inexpensive, ionizing radiation-free alternative to CT and MRI. CEUS has received approval for pediatric hepatic use but remains off-label for a range of other applications. The purposes of this study were to retrospectively analyze adverse incidents encountered in pediatric CEUS and to assess the financial benefits of reducing the number of CT and MRI examinations performed...
December 13, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27940009/no-protection-of-heart-kidneys-and-brain-by-remote-ischemic-preconditioning-before-transfemoral-transcatheter-aortic-valve-implantation-interim-analysis-of-a-randomized-single-blinded-placebo-controlled-single-center-trial
#17
Philipp Kahlert, Heike Annelie Hildebrandt, Polykarpos Christos Patsalis, Fadi Al-Rashid, Rolf Alexander Jánosi, Felix Nensa, Thomas Wilfried Schlosser, Marc Schlamann, Daniel Wendt, Matthias Thielmann, Eva Kottenberg, Ulrich Frey, Markus Neuhäuser, Michael Forsting, Heinz Günther Jakob, Tienush Rassaf, Jürgen Peters, Gerd Heusch, Petra Kleinbongard
BACKGROUND: Remote ischemic preconditioning (RIPC) reduces myocardial injury and improves clinical outcome in patients undergoing coronary revascularization, but only in the absence of propofol-anesthesia. We investigated whether RIPC provides protection of heart, kidneys and brain and improves outcome in patients undergoing transfemoral transcatheter aortic valve implantation (TF-TAVI). METHODS: Patients undergoing TF-TAVI were randomized to receive RIPC (3cycles of 5min left upper arm ischemia and 5min reperfusion) or placebo...
December 6, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27872353/feed-and-wrap-mri-technique-in-infants
#18
Nina K Antonov, Carrie B Ruzal-Shapiro, Kimberly D Morel, William S Millar, Sudha Kashyap, Christine T Lauren, Maria C Garzon
The feed and wrap technique refers to the use of feeding and swaddling to induce natural sleep in infants. It can be used prior to an magnetic resonance imaging (MRI) scan, avoiding sedation or anesthesia. We performed a retrospective review of feed and wrap MRI scans in infants 3 months or younger over a 2-year period at our center (279 scans) to evaluate the efficacy of this technique. Of scan results reviewed, 79% addressed the clinical question, 20% partially addressed the clinical question, and 1% were technically inadequate...
November 20, 2016: Clinical Pediatrics
https://www.readbyqxmd.com/read/27858672/guide-wire-breakage-during-posterolateral-endoscopic-lumbar-discectomy-procedure-a-case-report
#19
Xiaofei Guan, Shan Zhao, Xin Gu, Hailong Zhang, Shisheng He
OBJECTIVE: To present a unique case of guide wire breakage as a rare complication during posterolateral endoscopic lumbar discectomy. BACKGROUND: Posterolateral endoscopic lumbar discectomy (PELD) has become a routinely performed minimally invasive spinal procedure. However, several complications of PELD have attracted our concerns, including the intraoperative injury to neural and vascular structures and failure of the surgery. We have countered a rare intraoperative complication of guidewire breakage during a PELD procedure, as far as we know, this has not been reported previously, and we wish to draw attention to this hazard...
November 4, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27848124/reversible-cerebral-vasoconstriction-syndrome-and-posterior-reversible-encephalopathy-syndrome-associated-with-intracranial-hypotension
#20
Katharina Feil, Robert Forbrig, Franziska S Thaler, Julian Conrad, Suzette Heck, Franziska Dorn, Hans-Walter Pfister, Andreas Straube
BACKGROUND: Reversible cerebral vasoconstriction syndrome (RCVS) and posterior reversible encephalopathy syndrome (PRES) are both rare disorders. The pathophysiology of both diseases is not yet fully understood. METHODS: We report the unique case of a 19-year-old comatose woman who was brought to the ER after a series of generalized tonic-clonic seizures 6 days post peridural anesthesia for cesarean section. Vital signs and initial laboratory testing including urine analysis and drug screening were unremarkable...
November 15, 2016: Neurocritical Care
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