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Mri and anesthesia

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https://www.readbyqxmd.com/read/28217389/management-of-parturients-in-active-labor-with-arnold-chiari-malformation-tonsillar-herniation-and-syringomyelia
#1
Ramsis F Ghaly, Tatiana Tverdohleb, Kenneth D Candido, Nebojsa Nick Knezevic
BACKGROUND: Arnold-Chiari malformation Type 1 (ACM-1) in parturients is a topic of ongoing discussion between obstetricians and anesthesiologists. The primary unanswered question remains; How should the anesthesia provider proceed with labor analgesia and anesthesia for cesarean section when confronted with an advanced, asymptomatic, or minimally symptomatic case of ACM-1 during labor? CASE DESCRIPTION: A 24-year-old, ASA II, G1P0 full-term parturient presented to Labor and Delivery for vaginal delivery...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28194658/the-interaction-of-intramuscular-ketorolac-toradol-and-concussion-in-a-rat-model
#2
Amanda O Esquivel, Sarah S Sherman, Cynthia A Bir, Stephen E Lemos
The purpose of this study was to examine the interaction of a single dose of Toradol and head impact in an in vivo rat model for sport-related concussion using a validated rat concussion model. Thirty-five Sprague-Dawley rats were placed into one of four groups: (1) Control, (2) Impact Only, (3) Toradol Only, (4) Impact and Toradol. Animals in the impact groups were subjected to a single head impact. Animals in the Toradol group received a single intramuscular injection of Toradol prior to impact. We examined magnetic resonance imaging, serum S100-B and cognitive function using a Morris Water Maze...
February 13, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28186470/image-guidance-based-on-mri-for-spinal-interstitial-laser-thermotherapy-technical-aspects-and-accuracy
#3
Claudio E Tatsui, Clarissa N G Nascimento, Dima Suki, Behrang Amini, Jing Li, Amol J Ghia, Jonathan G Thomas, R Jason Stafford, Laurence D Rhines, Juan P Cata, Ashok J Kumar, Ganesh Rao
OBJECTIVE Image guidance for spinal procedures is based on 3D-fluoroscopy or CT, which provide poor visualization of soft tissues, including the spinal cord. To overcome this limitation, the authors developed a method to register intraoperative MRI (iMRI) of the spine into a neuronavigation system, allowing excellent visualization of the spinal cord. This novel technique improved the accuracy in the deployment of laser interstitial thermal therapy probes for the treatment of metastatic spinal cord compression...
February 10, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28183837/diagnostic-performance-of-ultrafast-brain-mri-for-evaluation-of-abusive-head-trauma
#4
S F Kralik, M Yasrebi, N Supakul, C Lin, L G Netter, R A Hicks, R A Hibbard, L L Ackerman, M L Harris, C Y Ho
BACKGROUND AND PURPOSE: MR imaging with sedation is commonly used to detect intracranial traumatic pathology in the pediatric population. Our purpose was to compare nonsedated ultrafast MR imaging, noncontrast head CT, and standard MR imaging for the detection of intracranial trauma in patients with potential abusive head trauma. MATERIALS AND METHODS: A prospective study was performed in 24 pediatric patients who were evaluated for potential abusive head trauma...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28181359/general-anesthesia-with-a-native-airway-for-patients-with-mucopolysaccharidosis-type-iii
#5
Mineto Kamata, Christopher McKee, Kristen V Truxal, Kevin M Flanigan, Kim L McBride, Shawn C Aylward, Joseph D Tobias, Marco Corridore
BACKGROUND: Mucopolysaccharidosis type III is a progressive disease with worsening airway, pulmonary, and cardiac involvement that may complicate anesthetic care. AIM: To prospectively evaluate the incidence of airway issues and complications during magnetic resonance imaging (MRI) and lumbar puncture (LP) during general anesthesia with a native airway for patients with mucopolysaccharidosis type III. METHOD: The study was a part of the natural history study...
February 8, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28160357/quantification-of-neonatal-lung-parenchymal-density-via-ultrashort-echo-time-mri-with-comparison-to-ct
#6
Nara S Higano, Robert J Fleck, David R Spielberg, Laura L Walkup, Andrew D Hahn, Robert P Thomen, Stephanie L Merhar, Paul S Kingma, Jean A Tkach, Sean B Fain, Jason C Woods
PURPOSE: To demonstrate that ultrashort echo time (UTE) magnetic resonance imaging (MRI) can achieve computed tomography (CT)-like quantification of lung parenchyma in free-breathing, non-sedated neonates. Because infant CTs are used sparingly, parenchymal disease evaluation via UTE MRI has potential for translational impact. MATERIALS AND METHODS: Two neonatal control cohorts without suspected pulmonary morbidities underwent either a research UTE MRI (n = 5; 1...
February 3, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28140423/obstetrisk-nervp%C3%A3-verkan-%C3%A3-r-oftast-inte-ryggbed%C3%A3-vningens-fel
#7
Lovisa Brehmer, Johan Rutfors
Postpartum nerve injury is usually not caused by neuroaxial anesthesia - a case report In this case report we describe a woman who after giving birth had numbness and could not support her weight on the right leg. Three attempts of epidural anesthesia had been made during labor. MRI imaging of the spinal cord showed no pathology. She was treated conservatively by a physiotherapist and recovered gradually. After six months all symptoms had resolved. Postpartum nerve injury is often thought to be due to neuroaxial anesthesia, although in most cases it is caused by labor itself...
January 27, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28128026/amide-proton-transfer-weighted-mri-detection-of-traumatic-brain-injury-in-rats
#8
Hong Zhang, Wenzhu Wang, Shanshan Jiang, Yi Zhang, Hye-Young Heo, Xianlong Wang, Yun Peng, Jian Wang, Jinyuan Zhou
The purpose of this study was to explore the capability and uniqueness of amide proton transfer-weighted (APTw) imaging in the detection of primary and secondary injury after controlled cortical impact (CCI)-induced traumatic brain injury (TBI) in rats. Eleven adult rats had craniotomy plus CCI surgery under isoflurane anesthesia. Multi-parameter MRI data were acquired at 4.7 T, at eight time points (1, 6 h, and 1, 2, 3, 7, 14, and 28 days after TBI). At one and six hours post-injury, average APTw signal intensities decreased significantly in the impacted and peri-lesional areas due to tissue acidosis...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28120090/radioguided-occult-lesion-localization-in-deep-schwannomas-of-the-peripheral-nerves-results-of-a-preliminary-case-series
#9
Giorgio Stevanato, Giovanni Monteleone, Donatella Sgubin, Michele Sicolo, Giulia Pastorello, Luca Vazzana, Franco Guida
BACKGROUND: The detection of small deep schwannomas of the peripheral nerves has been increasing since the the use of precise neuroimaging techniques has become more widespread; however, although nonpalpable lesions can be well defined by images, it is often difficult to identify them during the surgical procedure. The authors report seven cases of nonpalpable small deep schwannomas surgically treated after their identification using the radioguided occult lesion localization (ROLL) technique...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28108938/preoperative-work-up-for-definition-of-lymph-node-risk-involvement-in-early-stage-endometrial-cancer-5-year-follow-up
#10
Pietro Cignini, Salvatore Giovanni Vitale, Antonio Simone Laganà, Antonio Biondi, Valentina Lucia La Rosa, Giuseppe Cutillo
This prospective cohort study aimed to analyze the accuracy of magnetic resonance imaging (MRI) and hysteroscopic excisional biopsy (HEB) for predicting the low- and high-risk patients with endometrial carcinoma for nodal involvement at preoperative evaluation. From January 2005 to December 2006, all patients with a diagnosis of endometrial carcinoma were prospectively included in the study and underwent pelvic MRI and HEB. The pelvic MRI (without contrast) was aimed to evaluate the extent of myometrial invasion (MI < 50%, MI ≥ 50%), the possible involvement of cervical stroma, the ovarian, and lymph nodes status...
January 20, 2017: Updates in Surgery
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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