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Mri and anesthesia

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https://www.readbyqxmd.com/read/29145330/pathologic-femoral-fracture-due-to-tenofovir-induced-fanconi-syndrome-in-patient-with-chronic-hepatitis-b-a-case-report
#1
You-Sung Suh, Dong-Il Chun, Sung-Woo Choi, Hwan-Woong Lee, Jae-Hwi Nho, Soon-Hyo Kwon, Jae-Ho Cho, Sung Hun Won
RATIONALE: We report a case of a hepatitis B virus (HBV)-positive patient with preexisting bone disease who developed tenofovir-induced Fanconi syndrome and subsequently sustained pathologic fracture. To our best knowledge, this is the first report in the English literature about pathologic femoral fracture due to tenofovir-induced Fanconi syndrome in patient with chronic hepatitis B (CHB). The present report describes detailed our experience with the diagnosis of pathologic femoral fracture due to tenofovir-induced Fanconi syndrome and treatment...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29119285/lateral-femoral-notch-depth-is-not-associated-with-increased-rotatory-instability-in-acl-injured-knees-a-quantitative-pivot-shift-analysis
#2
Ajay C Kanakamedala, Jeremy M Burnham, Thomas R Pfeiffer, Elmar Herbst, Marcin Kowalczuk, Adam Popchak, James Irrgang, Freddie H Fu, Volker Musahl
PURPOSE: A deep lateral femoral notch (LFN) on lateral radiographs is indicative of ACL injury. Prior studies have suggested that a deep LFN may also be a sign of persistent rotatory instability and a concomitant lateral meniscus tear. Therefore, the purpose of this study was to evaluate the relationship between LFN depth and both quantitative measures of rotatory knee instability and the incidence of lateral meniscus tears. It was hypothesized that greater LFN depth would be correlated with increased rotatory instability, quantified by lateral compartment translation and tibial acceleration during a quantitative pivot shift test, and incidence of lateral meniscus tears...
November 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29101952/a-radiologist-s-view-of-tumor-ablation-in-the-radiology-suite
#3
REVIEW
Sharath K Bhagavatula, Jason Lane, Paul Shyn
Image-guided percutaneous, minimally invasive ablation techniques offer a wide variety of new modalities to treat tumors in some of the most medically complicated patients coming to our hospitals. The use of computed tomography, PET, ultrasound imaging, and MRI to guide radiofrequency ablation, microwave ablation, and cryoablation techniques now makes it possible to treat patients on a short stay or outpatient basis with very good immediate outcomes. This rapid expansion of new tumor ablation techniques often presents challenges for the non-operating room anesthesia team...
December 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/29095302/spontaneous-spinal-epidural-hematomas-one-case-report-and-rehabilitation-outcome
#4
Hang Xian, Li-Wei Xu, Cong-Han Li, Jian-Ming Hao, Wei-Xia Wan, Guo-Dong Feng, Ke-Jian Lian, Lin Li
RATIONALE: Spontaneous spinal epidural hematoma (SSEH) is a relatively rare but potentially disabling disease, and the classical presentation of it includes an acute onset of severe, sometimes radiating back or neck pain, followed by signs and symptoms of rapidly evolving nerve root or spinal cord compression. PATIENT CONCERNS: Here, we report a 26-year-old female patient presented with weakness in bilateral lower extremities, progressing to intense paraplegia and anesthesia without recent medical history of trauma, infection, surgery, or drug use...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29077256/screening-with-whole-body-magnetic-resonance-imaging-in-pediatric-subjects-with-li-fraumeni-syndrome-a-single-institution-pilot-study
#5
Allison F O'Neill, Stephan D Voss, Jyothi P Jagannathan, Junne Kamihara, Callie Nibecker, Elena Itriago-Araujo, Serena Masciari, Erin Parker, Mauricio Barreto, Wendy B London, Judy E Garber, Lisa Diller
BACKGROUND: Li-Fraumeni syndrome (LFS) is an autosomal dominant hereditary cancer syndrome associated with germline mutations in the TP53 gene and a high risk of childhood-onset malignancies. Cancer surveillance is challenging in pediatric mutation carriers given the anatomic spectrum of malignancies and young age of onset. Whole-body magnetic resonance imaging (WB-MRI) may provide an acceptable method for early cancer detection. PROCEDURE: We conducted a prospective feasibility pilot study of pediatric subjects (age < 18 years) with LFS to determine return rates for annual WB-MRI scan...
October 27, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29076979/the-impact-of-intraoperative-magnetic-resonance-imaging-on-patient-safety-management-during-awake-craniotomy
#6
Kotoe Kamata, Takashi Maruyama, Hiroshi Iseki, Minoru Nomura, Yoshihiro Muragaki, Makoto Ozaki
BACKGROUND: Awake craniotomy paired with intraoperative magnetic resonance imaging (iMRI) is now the established technique for maximizing surgical resection, while preserving neurological function. However, leaving an unsecured airway patient in the iMRI gantry represents considerable risk. Our study aimed at identifying the incidence of critical adverse events in unsecured airway patients during iMRI as part of awake craniotomy. MATERIALS AND METHODS: We conducted a clinical chart review of consecutive awake craniotomies performed between November 1999 and December 2015...
October 25, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/29073663/postpartum-headache-a-prospective-study
#7
Gian Paolo Anzola, Renato Brighenti, Milena Cobelli, Alessia Giossi, Sara Mazzucco, Silvia Olivato, Elisa Pari, Maria Paola Piras, Alessandro Padovani, Fabrizio Rinaldi, Giulia Turri
AIMS: To prospectively assess the incidence and etiology (ie, primary vs symptomatic) of headache in women during the first month postdelivery, with particular emphasis on the type of presentation as a clue for identifying potentially harmful etiologies. A secondary aim was to evaluate the relative frequency of migraine- vs tension-type headache in cases of primary headache. METHODS: A total of 900 consecutive women were enrolled in the study and examined within 3 days of delivery, both clinically and with transcranial color-coded sonography (TCCS)...
October 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/29055725/evaluation-of-prolonged-administration-of-isoflurane-on-cerebral-blood-flow-and-default-mode-network-in-macaque-monkeys-anesthetized-with-different-maintenance-doses
#8
Chun-Xia Li, Xiaodong Zhang
OBJECT: Isoflurane is a commonly used volatile anesthetic agent in clinical anesthesia and biomedical research. Prior study suggested the cerebral blood flow (CBF) and default mode network (DMN) could be changed after prolonged administration of isoflurane. The normal maintenance doses of isoflurane may vary from light (∼0.75%) to deep (∼1.5 or 2%) anesthesia. However, it is not clear how the duration effects are affected by the altered doses. The present study is aimed to examine if the duration effects are affected when isoflurane concentration is altered within normal maintenance doses...
October 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29051964/identification-of-quality-improvement-areas-in-pediatric-mri-from-analysis-of-patient-safety-reports
#9
Camilo Jaimes, Diana J Murcia, Karen Miguel, Cathryn DeFuria, Pallavi Sagar, Michael S Gee
BACKGROUND: Analysis of safety reports has been utilized to guide practice improvement efforts in adult magnetic resonance imaging (MRI). Data specific to pediatric MRI could help target areas of improvement in this population. OBJECTIVE: To estimate the incidence of safety reports in pediatric MRI and to determine associated risk factors. MATERIALS AND METHODS: In a retrospective HIPAA-compliant, institutional review board-approved study, a single-institution Radiology Information System was queried to identify MRI studies performed in pediatric patients (0-18 years old) from 1/1/2010 to 12/31/2015...
October 19, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29051898/accuracy-of-the-lever-sign-test-in-the-diagnosis-of-anterior-cruciate-ligament-injuries
#10
Keith A Jarbo, David E Hartigan, Kelly L Scott, Karan A Patel, Anikar Chhabra
BACKGROUND: The lever sign test is a new physical examination tool to diagnose anterior cruciate ligament (ACL) tears. Preliminary results suggest almost 100% sensitivity and specificity to diagnose acute and chronic complete ACL tears and clinically significant partial tears as compared with magnetic resonance imaging (MRI). PURPOSE: To assess the sensitivity and specificity of the lever sign test for the diagnosis of acute ACL injuries, as compared to MRI. We also aimed to determine the accuracy of the lever sign test compared with 3 other tests (anterior drawer, Lachman, and pivot shift) when performed by providers of various training levels, and with the patient awake or under anesthesia...
October 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29027853/intraoperative-test-stimulation-versus-stereotactic-accuracy-as-a-surgical-end-point-a-comparison-of-essential-tremor-outcomes-after-ventral-intermediate-nucleus-deep-brain-stimulation
#11
Tsinsue Chen, Zaman Mirzadeh, Kristina M Chapple, Margaret Lambert, Virgilio G H Evidente, Guillermo Moguel-Cobos, Srivadee Oravivattanakul, Padma Mahant, Francisco A Ponce
OBJECTIVE Ventral intermediate nucleus deep brain stimulation (DBS) for essential tremor is traditionally performed with intraoperative test stimulation and conscious sedation, without general anesthesia (GA). Recently, the authors reported retrospective data on 17 patients undergoing DBS after induction of GA with standardized anatomical coordinates on T1-weighted MRI sequences used for indirect targeting. Here, they compare prospectively collected data from essential tremor patients undergoing DBS both with GA and without GA (non-GA)...
October 13, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29026065/urethral-diverticulum-presenting-as-a-large-vaginal-mass-complicating-pregnancy-and-delivery
#12
Everett F Magann, Lisa S Newton, Susan A Barr
BACKGROUND A case report of urethral diverticulum complicating pregnancy is presented. The diagnosis and management are challenging because of the rare nature of this condition, the varied presentations and differential diagnoses, and the possibility of misdiagnosis. CASE REPORT A 25-year-old primigravida with scheduled induction of labor at 39 weeks gestation due to gestational diabetes mellitus presented for a routine antenatal appointment at 38 weeks and four days. On digital cervical examination, she was found to have a large semi-solid anterior vaginal mass, shown by trans-vaginal ultrasound to have a nearly solid appearance of a 5×7 cm mass with septation...
October 13, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29021984/mri-findings-of-early-stage-hyperacute-hemorrhage-causing-extramedullary-compression-of-the-cervical-spinal-cord-in-a-dog-with-suspected-steroid-responsive-meningitis-arteritis
#13
Adriano Wang-Leandro, Enrice-Ina Huenerfauth, Katharina Heissl, Andrea Tipold
A 9-month-old female Weimaraner was presented to the emergency service due to episodes of fever and neck pain. Physical examination revealed a stiff neck posture and elevated body temperature. Shortly after clinical examination was performed, the dog developed peracute onset of non-ambulatory tetraparesis compatible with a C1-C5 spinal cord (SC) lesion. Immediately thereafter (<1 h), MRI of the cervical SC was performed with a 3-T scanner. A left ventrolateral intradural-extramedullary SC compression caused by a round-shaped structure at the level of C3--C4 was evidenced...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28980498/design-construction-and-in-vivo-feasibility-of-a-positioning-device-for-irradiation-of-mice-brains-using-a-clinical-linear-accelerator-and-intensity-modulated-radiation-therapy
#14
Nicholas J Rancilio, Shaun Dahl, Ilektra Athanasiadi, Carlos J Perez-Torres
PURPOSE: The goal of this study was to design a positioning device that would allow for selective irradiation of the mouse brain with a clinical linear accelerator. METHODS: We designed and fabricated an immobilization fixture that incorporates three functions: head stabilizer (through ear bars and tooth bar), gaseous anesthesia delivery and scavenging, and tissue mimic/bolus. Cohorts of five mice were irradiated such that each mouse in the cohort received a unique dose between 1000 and 3000 cGy...
October 5, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28970203/activation-pattern-of-ace2-ang-1-7-and-ace-ang-ii-pathway-in-course-of-heart-failure-assessed-by-multiparametric-mri-in-vivo-in-tg%C3%AE-q-44-mice
#15
Urszula Tyrankiewicz, Mariola Olkowicz, Tomasz Skorka, Magdalena Jablonska, Anna Orzyłowska, Anna Bar, MichaL Gonet, Piotr Berkowicz, Krzysztof Jasinski, Jerzy A Zoladz, Ryszard T Smolenski, Stefan Chlopicki
Here we analyzed systemic (plasma) and local (heart/aorta) changes in ACE/ACE-2 balance in Tgαq*44 mice in course of heart failure (HF). Tgαq*44 mice with cardiomyocyte specific Gαq overexpression and late onset of HF were analyzed at different age for angiotensin pattern in plasma, heart and aorta using liquid chromatography/mass spectrometry, for progression of HF by in vivo magnetic resonance imaging under isoflurane anesthesia and for exercise capacity by voluntary wheel running. Six-month-old Tgαq*44 mice displayed decreased ventricle radial strains and impaired left atrial function...
September 28, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28967593/measurement-of-cerebrovascular-reactivity-as-blood-oxygen-level-dependent-magnetic-resonance-imaging-signal-response-to-a-hypercapnic-stimulus-in-mechanically-ventilated-patients
#16
Lashmi Venkatraghavan, Julien Poublanc, Jay S Han, Olivia Sobczyk, Casey Rozen, Kevin Sam, James Duffin, David J Mikulis, Joseph A Fisher
BACKGROUND: Impaired cerebrovascular reactivity (CVR) is an important prognostic marker of stroke. Most measures of CVR lack (1) a reproducible vasoactive stimulus and (2) a high time and spatial resolution measure of cerebral blood flow (CBF), particularly for mechanically ventilated patients. The aim of our study was to investigate the feasibility of measuring CVR using sequential gas delivery circuit and gas blender for precise targeting of end-tidal PCO2 (PetCO2), and blood oxygen level-dependent magnetic resonance imaging (BOLD-MRI) signal as a surrogate of CBF, in mechanically ventilated patients...
September 26, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28966151/the-long-and-winding-road-thoracic-myelopathy-associated-with-occipitocervical-dural-arteriovenous-fistula
#17
Angelique Sao-Mai Do, Joseph Kapurch, Ravi Kumar, John Port, Jeffrey W Miller, Jamie J Van Gompel
OBJECTIVES: Spinal dural arteriovenous fistulas (DAVFs) have diverse presentations. Magnetic resonance imaging (MRI) reveals spinal cord swelling in only 45% to 74% of cases. We present an unusual case of a 57-year old man with a craniocervical junction DAVF in which the edema appeared in the thoracolumbar region, skipping the cervical spinal cord. METHODS: A case report and literature review from a tertiary referral center are provided. RESULTS: In our patient, symptoms progressed over 3 months from low back and radicular pain to weakness, saddle anesthesia, and urinary retention...
September 29, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28960172/resting-state-functional-magnetic-resonance-imaging-for-surgical-planning-in-pediatric-patients-a-preliminary-experience
#18
Jarod L Roland, Natalie Griffin, Carl D Hacker, Ananth K Vellimana, S Hassan Akbari, Joshua S Shimony, Matthew D Smyth, Eric C Leuthardt, David D Limbrick
OBJECTIVE Cerebral mapping for surgical planning and operative guidance is a challenging task in neurosurgery. Pediatric patients are often poor candidates for many modern mapping techniques because of inability to cooperate due to their immature age, cognitive deficits, or other factors. Resting-state functional MRI (rs-fMRI) is uniquely suited to benefit pediatric patients because it is inherently noninvasive and does not require task performance or significant cooperation. Recent advances in the field have made mapping cerebral networks possible on an individual basis for use in clinical decision making...
September 29, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28953535/comparison-of-transperianal-ultrasound-with-colonoscopy-and-magnetic-resonance-imaging-in-perianal-crohn-s-disease
#19
Eun Hye Lee, Hye Ran Yang, Ji Young Kim
OBJECTIVES: Perianal fistulae and/or abscesses are common complications of Crohn's disease (CD), especially in children. Magnetic resonance imaging (MRI) and gross examination under anesthesia are accurate diagnostic modalities for evaluating perianal lesions. However, both methods are expensive and have some limitations for use in children. This study aims to assess the accuracy of transperianal ultrasound (TPUS) and colonoscopic examination, compared with MRI, in pediatric patients with perianal CD (PACD)...
September 26, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28942060/functional-networks-and-network-perturbations-in-rodents
#20
REVIEW
Kai-Hsiang Chuang, Fatima A Nasrallah
Synchronous low-frequency oscillation in the resting human brain has been found to form networks of functionally associated areas and hence has been widely used to map the functional connectivity of the brain using techniques such as resting-state functional MRI (rsfMRI). Interestingly, similar resting-state networks can also be detected in the anesthetized rodent brain, including the default mode-like network. This opens up opportunities for understanding the neurophysiological basis of the rsfMRI signal, the behavioral relevance of the network characteristics, connectomic deficits in diseases and treatment effects on brain connectivity using rodents, particularly transgenic mouse models...
September 21, 2017: NeuroImage
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