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https://www.readbyqxmd.com/read/28642116/contrast-induced-nephropathy-basic-concepts-pathophysiological-implications-and-prevention-strategies
#1
REVIEW
Charalampos Mamoulakis, Konstantinos Tsarouhas, Irini Fragkiadoulaki, Ioannis Heretis, Martin F Wilks, Demetrios A Spandidos, Christina Tsitsimpikou, Aristides Tsatsakis
Contrast-induced nephropathy (CIN) is reversible acute renal failure observed following administration of iodinated contrast media (CM) during angiographic or other medical procedures such as urography. There are various mechanisms through which CM develop their nephrotoxic effects, including oxidative stress and apoptosis. CIN is a real-life, albeit not very rare, entity. Exact pathophysiology remains obscure and no standard diagnostic criteria apply. The Acute Kidney Injury Network criteria was recently employed but its incidence/clinical significance warrants further clarification based on recent methodological advancements, because most published studies to date were contaminated by bias...
June 19, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28635617/the-dosimetric-impact-of-gadolinium-based-contrast-media-in-gbm-brain-patient-plans-for-a-mri-linac
#2
Syed Bilal Ahmad, Moti Raj Paudel, Arman Sarfehnia, Anthony Kim, Geordi Pang, Mark Ruschin, Arjun Sahgal, Brian M Keller
Dosimetric effects of gadolinium based contrast media (Gadovist) were evaluated for the Elekta MRI Linear accelerator (MRL) using the research version of Monaco treatment planning system (TPS). In order to represent a gadolinium uptake it was manually assigned to a phantom as well as to the Gross Tumour Volume (GTV) of 6 Glioblastoma Multiforme (GBM) patients. A preliminary estimate of dose enhancement, due to gadolinium, was performed using the phantom irradiated with a single beam. More complicated assessment was performed for the GBM patients using a 7 field IMRT technique...
June 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28621151/case-report-and-literature-review-on-contrast-induced-encephalopathy
#3
Mardi Hamra, Yasir Bakhit, Mahboob Khan, Roger Moore
Contrast-induced encephalopathy (CIE) is a rare neurological complication following the administration of injectable intravascular contrast media. Patients with CIE present a wide spectrum of symptoms such as headache, transient cortical blindness, seizure and focal neurological deficits. The diagnosis of CIE requires a high index of suspicion. Its early recognition is of paramount importance in instituting the appropriate supportive treatment in the form of intravenous fluids and also in avoiding unnecessary potentially harmful treatment such as intravenous thrombolysis for suspected ischemic stroke...
June 16, 2017: Future Cardiology
https://www.readbyqxmd.com/read/28620616/the-impact-of-combining-a-low-tube-voltage-acquisition-with-iterative-reconstruction-on-total-iodine-dose-in-coronary-ct-angiography
#4
Toon Van Cauteren, Gert Van Gompel, Kaoru Tanaka, Douwe E Verdries, Dries Belsack, Koenraad H Nieboer, Inneke Willekens, Paul Evans, Sven Macholl, Guy Verfaillie, Steven Droogmans, Johan de Mey, Nico Buls
OBJECTIVES: To assess the impact of combining low-tube voltage acquisition with iterative reconstruction (IR) techniques on the iodine dose in coronary CTA. METHODS: Three minipigs underwent CCTA to compare a standard of care protocol with two alternative study protocols combining low-tube voltage and low iodine dose with IR. Image quality was evaluated objectively by the CT value, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) in the main coronary arteries and aorta and subjectively by expert reading...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28616535/effect-of-intravenous-infusion-of-iodinated-contrast-media-on-the-coronary-blood-flow-in-dogs
#5
Thura T Abd, Asim I Shafique, Hayder S Yasir, Jung-Hee Seo, Richard T George, Rajat Mittal, Albert C Lardo
BACKGROUND: Coronary computed tomography angiography (CCTA) is obtained using peripheral intravenous iodinated contrast agents (ICA) injection. There is continuing attempts to derive coronary physiological information like coronary blood flow (CBF) and/or fractional flow reserve from CCTA images. However, no data is available regarding the effect of peripheral intravenous injection of ICA on CBF. METHODS: A series of 4 experiments was performed using healthy mongrel dogs...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28611938/anatomic-study-of-the-vascular-perfusion-of-the-sternum-and-its-clinical-relevance-in-deep-sternal-wound-infection
#6
Nick Spindler, Florian Kaatz, Christine Feja, Christian Etz, Friedrich-Wilhelm Mohr, Ingo Bechmann, Christoph Josten, Stefan Langer, Sabine Loeffler
Introduction: Deep sternal wound infections (DSWI) are a rare but devastating complication after median sternotomy. Minor perfusion in bone and soft tissue, especially after recruiting the internal mammary artery for bypass supports the development of wound infection and nonunion of the sternal bone. The aim of the study was the macroscopic and radiological presentation of the vascular system supplying the sternum, in particular the compensating blood supply routes in the event that the internal mammary artery is no longer available after use as a bypass vessel...
2017: GMS Interdisciplinary Plastic and Reconstructive Surgery DGPW
https://www.readbyqxmd.com/read/28610773/contrast-induced-acute-kidney-injury-in-interventional-cardiology-emerging-evidence-and-unifying-mechanisms-of-protection-by-remote-ischemic-conditioning
#7
REVIEW
Adebayo C Atanda, Oladipupo Olafiranye
Contrast-induced acute kidney injury (CI-AKI) is a common complication of many diagnostic and therapeutic cardiovascular procedures. It is associated with longer in-hospital stay, more complicated hospitalization course, and higher in-hospital morbidity and mortality. With increasing use of contrast media in various diagnostic and interventional procedures, the prevalence of CI-AKI is expected to rise. Although pre-hydration with intravenous normal saline is recommended in patients with elevated risk of CI-AKI, this approach is often not feasible in many clinical settings...
June 6, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28607937/contrast-media-induced-anaphylaxis-causing-a-stress-related-cardiomyopathy-post-percutaneous-coronary-intervention-case-report
#8
Rajeev Seecheran, Valmiki Seecheran, Sangeeta Persad, Sasha Lalla, Naveen Anand Seecheran
Anaphylaxis is a sudden-onset, severe hypersensitivity reaction that can be potentially fatal. It can often transition to refractory hemodynamic instability, eventually resulting in death. Stress-related cardiomyopathies (SRCs) have multifactorial etiologies, including being linked to excessive catecholamine release in periods of intense stress. This novel case report recounts a SRC caused by contrast-induced anaphylaxis within 1 hour post percutaneous coronary intervention. Both acutely life-threatening conditions may occur simultaneously and are implicated with devastating complications...
April 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28601007/distribution-and-relevance-of-iodinated-x-ray-contrast-media-and-iodinated-trihalomethanes-in-an-aquatic-environment
#9
Zhifa Xu, Xia Li, Xialin Hu, Daqiang Yin
Distribution and relevance of iodinated X-ray contrast media (ICM) and iodinated disinfection byproducts (I-DBPs) in a real aquatic environment have been rarely documented. In this paper, some ICM were proven to be strongly correlated with I-DBPs through investigation of five ICM and five iodinated trihalomethanes (I-THMs) in surface water and two drinking water treatment plants (DWTPs) of the Yangtze River Delta, China. The total ICM concentrations in Taihu Lake and the Huangpu River ranged from 88.7 to 131 ng L(-1) and 102-252 ng L(-1), respectively...
June 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28592709/relationship-between-contrast-enhancement-of-the-perivascular-space-in-the-basal-ganglia-and-endolymphatic-volume-ratio
#10
Toshio Ohashi, Shinji Naganawa, Toshio Katagiri, Kayao Kuno
PURPOSE: We routinely obtain the endolymphatic hydrops (EH) image using heavily T2-weighted three dimensional-fluid attenuated inversion recovery (hT2w-3D-FLAIR) imaging at 4 hours after intravenous administration of a single-dose of gadolinium-based contrast media (IV-SD-GBCM). While repeating the examination, we speculated that the contrast enhancement of the perivascular space (PVS) in the basal ganglia might be related to the degree of EH. Therefore, the purpose of this study was to investigate the relationship between the endolymphatic volume ratio (%ELvolume) and the signal intensity of the PVS (SI-PVS)...
June 8, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28586440/circumferential-wall-enhancement-on-magnetic-resonance-imaging-is-useful-to-identify-rupture-site-in-patients-with-multiple-cerebral-aneurysms
#11
Shunsuke Omodaka, Hidenori Endo, Kuniyasu Niizuma, Miki Fujimura, Toshiki Endo, Kenichi Sato, Shin-Ichiro Sugiyama, Takashi Inoue, Teiji Tominaga
BACKGROUND: Identification of rupture sites in patients with multiple intracranial aneurysms is largely based on aneurysm size, location, and shape. Finding circumferential enhancement along the aneurysm wall (CEAW) on magnetic resonance (MR) vessel wall imaging was recently shown to be indicative of ruptured aneurysm. OBJECTIVE: To investigate the hypothesis that a higher degree of CEAW would identify the site of rupture in patients with multiple aneurysms. METHODS: We prospectively performed quantitative analysis of CEAW in consecutive patients with both aneurysmal subarachnoid hemorrhage and multiple aneurysms (26 patients with a total of 62 aneurysms), using MR vessel wall imaging...
June 6, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28584948/evaluation-of-visualization-using-a-50-50-contrast-media-glucose-5-solution-technique-for-radioembolization-as-an-alternative-to-a-standard-sandwich-technique
#12
Karolin J Paprottka, Andrei Todica, Harun Ilhan, Johannes Rübenthaler, Franziska Schoeppe, Marlies Michl, Volker Heinemann, Peter Bartenstein, Maximilian F Reiser, Philipp M Paprottka
BACKGROUND: Radioembolization (RE) with (90)yttrium ((90)Y) resin microspheres generally employs a sandwich technique with separate sequential administration of contrast medium (CM), followed by vehicle (e.g., glucose 5% [G5] solution), then (90)Y resin microspheres (in G5), then G5, and then CM again to avoid contact of CM and microspheres under fluoroscopic guidance. This study evaluates the visualization quality and safety of a modified sandwich technique with a 50/50-mixture of CM (Imeron 300) and G5 for administration of (90)Y resin microspheres...
June 5, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28580350/colon-perforation-due-to-embolization-coil-for-internal-iliac-aneurysm
#13
Ho Kyun Lee, Hong Sung Jung, Sang Young Chung, Soo Jin Na Choi
Coil migration is an extremely rare but hazardous complication of aneurysmal coil embolization. Only 1 case report has described coil migration following endovascular exclusion to gastrointestinal (GI) tract. We report the experience of a case of colon penetration caused by embolization coil placed for internal iliac aneurysm. A 66-year-old man visited the Emergency Department for hematochezia that had persisted for 3 months. Stent insertion and coil embolization of left internal iliac artery aneurysm had been performed on the patient 18 months ago...
June 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28572534/contrast-media-enhancement-reduction-predicts-tumor-response-to-presurgical-molecular-targeting-therapy-in-patients-with-advanced-renal-cell-carcinoma
#14
Shogo Hosogoe, Shingo Hatakeyama, Ayumu Kusaka, Itsuto Hamano, Yoshimi Tanaka, Kazuhisa Hagiwara, Hideaki Hirai, Satoko Morohashi, Hiroshi Kijima, Hayato Yamamoto, Yuki Tobisawa, Tohru Yoneyama, Takahiro Yoneyama, Yasuhiro Hashimoto, Takuya Koie, Chikara Ohyama
BACKGROUND AND OBJECTIVE: A quantitative tumor response evaluation to molecular-targeting agents in advanced renal cell carcinoma (RCC) is debatable. We aimed to evaluate the relationship between radiologic tumor response and pathological response in patients with advanced RCC who underwent presurgical therapy. RESULTS: Of 34 patients, 31 underwent scheduled radical nephrectomy. Presurgical therapy agents included axitinib (n = 26), everolimus (n = 3), sunitinib (n = 1), and axitinib followed by temsirolimus (n = 1)...
May 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28567798/management-for-intussusception-in-children
#15
REVIEW
Steven Gluckman, Jonathan Karpelowsky, Angela C Webster, Richard G McGee
BACKGROUND: Intussusception is a common abdominal emergency in children with significant morbidity. Prompt diagnosis and management reduces associated risks and the need for surgical intervention. Despite widespread agreement on the use of contrast enema as opposed to surgery for initial management in most cases, debate persists on the appropriate contrast medium, imaging modality, pharmacological adjuvant, and protocol for delayed repeat enema, and on the best approach for surgical management for intussusception in children...
June 1, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28566501/prevention-of-contrast-induced-nephropathy-by-limb-ischemic-preconditioning-underlying-mechanisms-and-clinical-effects
#16
George Dugbartey, Andrew N Redington
Contrast-induced nephropathy (CIN) is an important complication following diagnostic radiographic imaging and interventional therapy. It results from administration of intravascular iodinated contrast media (CM) and is currently the third most common cause of hospital-acquired acute kidney injury. CIN is associated with increased morbidity, prolonged hospitalization and higher mortality. Although the importance of CIN is widely appreciated, and its occurrence can be mitigated by the use of pre- and post-hydration protocols and low osmolar instead of high osmolar iodine-containing CM, specific prophylactic therapy is lacking...
May 31, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28565035/clinical-experience-with-wbc-pet-ct-in-adpkd-patients-with-suspected-cyst-infection-a-prospective-case-series
#17
Hyunsuk Kim, Yun Kyu Oh, Hayne Cho Park, Seokwoo Park, Soojin Lee, Ho-Young Lee, Young-Hwan Hwang, Curie Ahn
AIMS: Cyst infection (CI) is a common problem in patients with autosomal dominant polycystic kidney disease (ADPKD). Localization is of great importance in CI. We describe the clinical experience with [18F] FDG-labeled white-blood cell (WBC) PET/CT in detecting CI in ADPKD. METHODS: 19 ADPKD patients (M:F = 7:12) suspected of having CI were enrolled in this prospective study. All underwent WBC-PET/CT and MRI or CT. The degree of their WBC accumulation was evaluated from the maximal standardized uptake value of cystic wall...
May 31, 2017: Nephrology
https://www.readbyqxmd.com/read/28540480/the-effect-of-four-phasic-versus-three-phasic-contrast-media-injection-protocols-on-extravasation-rate-in-coronary-ct-angiography-a-randomized-controlled-trial
#18
Júlia Karády, Alexisz Panajotu, Márton Kolossváry, Bálint Szilveszter, Ádám L Jermendy, Andrea Bartykowszki, Mihály Károlyi, Csilla Celeng, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVES: Contrast media (CM) extravasation is a well-known complication of CT angiography (CTA). Our prospective randomized control study aimed to assess whether a four-phasic CM administration protocol reduces the risk of extravasation compared to the routinely used three-phasic protocol in coronary CTA. METHODS: Patients referred to coronary CTA due to suspected coronary artery disease were included in the study. All patients received 400 mg/ml iomeprol CM injected with dual-syringe automated injector...
May 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28540464/comparison-of-lesion-enhancement-between-bb-cube-and-3d-spgr-images-for-brain-tumors-with-1-5-t-magnetic-resonance-imaging
#19
Hirokazu Hasegawa, Ryuichiro Ashikaga, Kaoru Okajima, Tetsuya Wakayama, Mitsuharu Miyoshi, Yasumasa Nishimura, Takamichi Murakami
PURPOSE: This study aimed to compare the detectability of neoplastic lesion enhancement after gadolinium-based contrast media injection in three-dimensional T1-weighted black blood Cube (3D-T1W BB Cube) and three-dimensional T1-weighted fast spoiled gradient-echo (3D-T1W fast SPGR) images obtained with 1.5-T magnetic resonance imaging (MRI). MATERIALS AND METHODS: Phantom and clinical studies were performed to compare the lesion detectability and contrast ratio (CR) between 3D-T1W BB Cube and 3D-T1W fast SPGR pulse sequences...
May 24, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28540212/infarct-characterization-using-ct
#20
REVIEW
Ludovico La Grutta, Patrizia Toia, Erica Maffei, Filippo Cademartiri, Roberto Lagalla, Massimo Midiri
Myocardial infarction (MI) is a major cause of death and disability worldwide. The incidence is not expected to diminish, despite better prevention, diagnosis and treatment, because of the ageing population in industrialized countries and unhealthy lifestyles in developing countries. Nowadays it is highly requested an imaging tool able to evaluate MI and viability. Technology improvements determined an expansion of clinical indications from coronary plaque evaluation to functional applications (perfusion, ischemia and viability after MI) integrating additional phases and information in the mainstream examination...
April 2017: Cardiovascular Diagnosis and Therapy
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