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Malignant Hyperthermia

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https://www.readbyqxmd.com/read/29767441/hydrogen-sulfide-pathway-and-skeletal-muscle-an-introductory-review
#1
REVIEW
Valentina Vellecco, Chiara Armogida, Mariarosaria Bucci
The presence of H2 S pathway in skeletal muscle (SKM) has been recently established. SKM expresses the three constitutive H2 S generating enzymes in animals and humans and it actively produces H2 S. The main recognized molecular targets of H2 S, i.e. potassium channels and phosphodiesterases, have been evaluated in SKM physiology in order to hypothesize a role for H2 S signaling. SKM dysfunctions, including muscular dystrophy and malignant hyperthermia, have been also evaluated as conditions in which H2 S-pathway and the trans-sulfuration pathway have been suggested to be involved...
May 16, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29760370/using-eye-tracking-technology-to-compare-the-effectiveness-of-malignant-hyperthermia-cognitive-aid-design
#2
Roderick King, Jaber Hanhan, T Kyle Harrison, Alex Kou, Steven K Howard, Lindsay K Borg, Cynthia Shum, Ankeet D Udani, Edward R Mariano
Background: Malignant hyperthermia is a rare but potentially fatal complication of anesthesia, and several different cognitive aids designed to facilitate a timely and accurate response to this crisis currently exist. Eye tracking technology can measure voluntary and involuntary eye movements, gaze fixation within an area of interest, and speed of visual response and has been used to a limited extent in anesthesiology. Methods: With eye tracking technology, we compared the accessibility of five malignant hyperthermia cognitive aids by collecting gaze data from twelve volunteer participants...
May 15, 2018: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29747958/emergency-department-intubation-success-with-succinylcholine-versus-rocuronium-a-national-emergency-airway-registry-study
#3
Michael D April, Allyson Arana, Daniel J Pallin, Steven G Schauer, Andrea Fantegrossi, Jessie Fernandez, Joseph K Maddry, Shane M Summers, Mark A Antonacci, Calvin A Brown
STUDY OBJECTIVE: Although both succinylcholine and rocuronium are used to facilitate emergency department (ED) rapid sequence intubation, the difference in intubation success rate between them is unknown. We compare first-pass intubation success between ED rapid sequence intubation facilitated by succinylcholine versus rocuronium. METHODS: We analyzed prospectively collected data from the National Emergency Airway Registry, a multicenter registry collecting data on all intubations performed in 22 EDs...
May 7, 2018: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/29745269/biophysical-and-photobiological-basics-of-water-filtered-infrared-a-hyperthermia-of-superficial-tumors
#4
Peter Vaupel, Helmut Piazena, Werner Müller, Markus Notter
Thermography-controlled, water-filtered infrared-A (wIRA) is a novel, effective and approved heating technique listed in the ESHO quality assurance guidelines for superficial hyperthermia clinical trials (2017). In order to assess the special features and the potential of wIRA-hyperthermia (wIRA-HT), detailed and updated information about its physical and photobiological background is presented. wIRA allows for (a) application of high irradiances without skin pain and acute grade 2-4 skin toxicities, (b) prolonged, therapeutically relevant exposure times using high irradiances (150-200 mW/cm2 ) and (c) faster and deeper heat extension within tissues...
May 10, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29733199/nanosystems-based-on-magnetic-nanoparticles-and-thermo-or-ph-responsive-polymers-an-update-and-future-perspectives
#5
Binh T Mai, Soraia Fernandes, Preethi B Balakrishnan, Teresa Pellegrino
Combining hard matter, like inorganic nanocrystals, and soft materials, like polymers, can generate multipurpose materials with a broader range of applications with respect to the individual building blocks. Given their unique properties at the nanoscale, magnetic nanoparticles (MNPs) have drawn a great deal of interest due to their potential use in the biomedical field, targeting several applications such as heat hubs in magnetic hyperthermia (MHT, a heat-damage based therapy), contrast agents in magnetic resonance imaging (MRI), and nanocarriers for targeted drug delivery...
May 7, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29730239/malignant-hyperthermia-review-of-diagnosis-and-treatment-during-cardiac-surgery-with-cardiopulmonary-bypass
#6
REVIEW
Brian Butala, Michael Busada, Daniel Cormican
Malignant hyperthermia is a potentially life-threatening hypermetabolic disorder, often induced by exposure to volatile anesthetics and succinylcholine. There are few reports of malignant hyperthermia during cardiopulmonary bypass. Here the authors review available literature including case reports of malignant hyperthermia and cardiopulmonary bypass and discuss the potential implications of malignant hyperthermia diagnosis and management as it applies to cardiac surgery.
March 20, 2018: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29715088/application-of-albumin-embedded-magnetic-nanoheaters-for-release-of-etoposide-in-integrated-chemotherapy-and-hyperthermia-of-u87-mg-glioma-cells
#7
Melánia Babincová, Hana Vrbovská, Paul Sourivong, Peter Babinec, Štefan Durdík
BACKGROUND/AIM: Malignant gliomas remain refractory to several therapeutic approaches and the requirement for novel treatment modalities is critical to combat this disease. Etoposide is a topoisomerase-II inhibitor, which promotes DNA damage and apoptosis of cancer cells. In this study, we prepared albumin with embedded magnetic nanoparticles and etoposide for in vitro evaluation of combined hyperthermia and chemotherapy. MATERIAL AND METHODS: Magnetic nanoparticles were prepared by a modified co-precipitation method in the presence of human serum albumin and etoposide...
May 2018: Anticancer Research
https://www.readbyqxmd.com/read/29701428/anaesthetic-management-in-a-duchennne-muscle-dystrophy-patient-for-treatment-of-recurrent-pneumothorax
#8
Sara Mota, Liuba Germanova, Joana Cortesão, Teresa Paiva
INTRODUCTION: Duchenne muscular dystrophy (DMD) is an x linked recessive disorder. Long term prognosis is ominous, with development of respiratory distress and cardiomyopathy in advanced stage of the disease and expected death in the teens-to-mid 20s due to respiratory or cardiac failure. Peri-operative management of this patients is challenging due to difficult airway anatomy (macroglossia, limited neck and mandibular mobility). Additionally, they are at risk of developing malignant hyperthermia, rhabdomyolysis and hyperkalemic cardiac arrest when exposed to halogenated inhalational anaesthetics and depolarizing muscle relaxants...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29699707/anaesthetic-management-of-a-paediatric-patient-with-congenital-fibre-type-disproportion-myopathy
#9
F Buisán, O de la Varga, M Flores, J Sánchez-Ruano
Congenital fibre type disproportion (CFTD) is a rare type of myopathy that is characterised by muscle weakness and hypotonia during childhood. Clinical features include motor delay, feeding difficulties, limb weakness, joint contractures, and scoliosis. A report is presented of the anaesthetic management of a 3-year-old girl with CFTD myopathy associated with a mutation of the TPM3 gene, scheduled for adenotonsillectomy because of obstructive sleep apnoea hypopnoea syndrome (OSAHS). The main concerns were the possible susceptibility to malignant hyperthermia, the risk of anaesthesia-induced rhabdomyolysis, a greater sensitivity to non-depolarising muscle relaxants, and the presence of OSAHS...
April 23, 2018: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/29672467/concepts-for-the-simulation-community-development-of-the-international-simulation-data-registry
#10
Aaron William Calhoun, Vinay Nadkarni, Carla Venegas-Borsellino, Marjorie Lee White, Matt Kurrek
The past several decades have seen tremendous growth in our understanding of best practices in simulation-based healthcare education. At present, however, there is limited infrastructure available to assist programs in translation of these best practices into more standardized educational approaches, higher quality of care, and ultimately improved outcomes. In 2014, the International Simulation Data Registry (ISDR) was launched to address this important issue. The existence of such a registry has important implications not just for educational practice but also for research...
April 18, 2018: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/29672336/cost-benefit-analysis-of-maintaining-a-fully-stocked-malignant-hyperthermia-cart-versus-an-initial-dantrolene-treatment-dose-for-maternity-units
#11
Phi T Ho, Brendan Carvalho, Eric C Sun, Alex Macario, Edward T Riley
BACKGROUND: The Malignant Hyperthermia Association of the United States recommends that dantrolene be available for administration within 10 min. One approach to dantrolene availability is a malignant hyperthermia cart, stocked with dantrolene, other drugs, and supplies. However, this may not be of cost benefit for maternity units, where triggering agents are rarely used. METHODS: The authors performed a cost-benefit analysis of maintaining a malignant hyperthermia cart versus a malignant hyperthermia cart readily available within the hospital versus an initial dantrolene dose of 250 mg, on every maternity unit in the United States...
April 19, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29666709/anesthetic-considerations-for-an-adult-patient-with-freeman-sheldon-syndrome-undergoing-open-heart-surgery
#12
S Viehmeyer, P Gabriel, K Bauer, S Bauer, R Sodian, J N Hilberath
Freeman-Sheldon syndrome (FSS) or "whistling face" syndrome is a rare congenital disorder complicated by characteristic facial deformities and muscular contractures. We report on a 64-year-old male patient presenting for surgical replacement of his aortic valve and review the available literature on anesthetic considerations and perioperative management principles. FSS frequently poses a significant challenge to airway management and gaining vascular access. Moreover, these patients are reportedly at risk for developing malignant hyperthermia (MH) or neuroleptic malignant syndrome...
2018: Case Reports in Anesthesiology
https://www.readbyqxmd.com/read/29663543/surface-nanopore-engineering-of-2d-mxenes-for-targeted-and-synergistic-multitherapies-of-hepatocellular-carcinoma
#13
Zhenli Li, Han Zhang, Jun Han, Yu Chen, Han Lin, Tian Yang
Hepatocellular carcinoma (HCC) is one of the most common and deadly gastrointestinal malignancies. Given its insensitivity to traditional systematic chemotherapy, new therapeutic strategies for efficient HCCs treatment are urgently needed. Here, the development of a novel 2D MXene-based composite nanoplatform for highly efficient and synergistic chemotherapy and photothermal hyperthermia against HCC is reported. A surface-nanopore engineering strategy is developed for the MXenes' surface functionalization, which achieves the uniform coating of a thin mesoporous-silica layer onto the surface of 2D Ti3 C2 MXene (Ti3 C2 @mMSNs)...
April 16, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29659611/preoperative-evaluation-of-the-efficacy-of-radio-hyperthermo-chemotherapy-for-soft-tissue-sarcoma-in-a-case-series
#14
Hisaki Aiba, Satoshi Yamada, Jun Mizutani, Norio Yamamoto, Hideki Okamoto, Katsuhiro Hayashi, Hiroaki Kimura, Akihiko Takeuchi, Shinji Miwa, Takashi Higuchi, Kensaku Abe, Yuta Taniguchi, Yoshihiro Araki, Hiroyuki Tsuchiya, Takanobu Otsuka
PURPOSE: Radio-hyperthermo-chemo (RHC) therapy, which combines radiotherapy, hyperthermia, and chemotherapy, for malignant soft tissue tumors has been introduced with the aim of decreasing the possibility of local recurrence after surgery. To avoid unnecessary neoadjuvant therapy and to plan the appropriate surgical treatment, surveillance of RHC therapeutic efficacy during treatment is necessary. In this study, we determined the optimal response criteria to evaluate the efficacy of RHC by comparing preoperative images before and after RHC with pathological evaluation of necrosis in the resected tumor...
2018: PloS One
https://www.readbyqxmd.com/read/29655994/peripartum-anaesthetic-management-of-a-patient-with-brugada-syndrome-and-myoadenylate-deaminase-deficiency
#15
H Dawe, R Wendler, E Evans, S Hammond
Brugada syndrome is a rare electrophysiological cardiac disease which can result in serious arrhythmias and sudden cardiac death. Peripartum management is centred around avoiding arrhythmogenic drugs, including high doses of sodium channel blocking drugs such as bupivacaine. Myoadenylate deaminase deficiency, also known as adenosine monophosphate deaminase deficiency, is the commonest cause of myopathy in Caucasians. There is evidence that myoadenylate deaminase deficiency can predispose patients to developing malignant hyperthermia when exposed to specific anaesthetic agents...
March 2, 2018: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/29608462/management-of-a-patient-with-a-history-of-nonanesthesia-related-malignant-hyperthermia-undergoing-laparoscopic-cholecystectomy-a-case-report
#16
Emily P Nelson, Margaret E Dorlon, Tamas A Szabo, Jonathan B Trollinger, Crystal Johnson-Mann, Gearin Broderick, Robert D Warters
A 36-year-old African American with a medical history of nonanesthesia-related malignant hyperthermia (MH) who was taking chronic oral dantrolene therapy presented with right upper quadrant pain for a laparoscopic cholecystectomy. A multidisciplinary perioperative plan was implemented with the goal of avoiding triggering an MH episode or rhabdomyolysis. He developed a postoperative left brachial vein thrombus of unclear etiology, possibly related to dantrolene administration or his underlying susceptibility to MH...
March 30, 2018: A&A practice
https://www.readbyqxmd.com/read/29600483/updated-guide-for-the-management-of-malignant-hyperthermia
#17
Sheila Riazi, Natalia Kraeva, Philip M Hopkins
PURPOSE: This continuing professional development module aims to prepare anesthesiologists for the timely recognition and management of a malignant hyperthermia (MH) reaction, which is crucial for averting its life-threatening complications and ultimately for the patient's survival. PRINCIPAL FINDINGS: Malignant hyperthermia is a genetic disorder of skeletal muscle cells affecting myoplasmic calcium homeostasis. It can present with nonspecific signs of a hypermetabolic reaction, which can be fatal if treatment, including administration of dantrolene sodium, is not implemented promptly...
March 29, 2018: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29581830/orthotopic-hepatic-cancer-radiofrequency-hyperthermia-enhanced-intratumoral-herpes-simplex-virus-thymidine-kinase-gene-therapy
#18
Fu Xiong, Feng Zhang, Yin Jin, Qiaoyou Weng, Jingjing Song, Guofeng Zhou, David Shin, Chuansheng Zheng, Xiaoming Yang
Purpose: To validate the feasibility of using interventional radiofrequency hyperthermia(RFH) to enhance herpes simplex virus-thymidine kinase (HSV-TK)/ganciclovir (GCV) gene therapy of rat orthotopic hepatic cancer. Material and Methods: Rat hepatocellular carcinoma cells (MCA-RH-7777) were transduced with lentivirus/luciferase gene for optical imaging. In-vitro experiments with the luciferase cells and in-vivo experiments on rats with orthotopic hepatic tumors were divided into four treatment groups: (i) HSV-TK/GCV-mediated gene therapy combined with RFH; (ii) gene therapy alone; (iii) RFH alone; and (iv) phosphate buffered saline (PBS)...
March 6, 2018: Oncotarget
https://www.readbyqxmd.com/read/29578166/the-effect-of-temperature-control-microwave-on-hela-and-mg-63-cells
#19
Zhenwei Ji, Yunlei Ma, Haien Zhao, Wei Li, Xiaoxiang Li, Zhe Yun, Guangyi Zhao, Baoan Ma, Qingyu Fan
Context: Hyperthermia has now been used to treat many kinds of solid malignancies. However, the applied thermal parameters about heat temperature and time varied all over the world, and no consensus about the optimal formula had been reached. Microwave ablation, as one of thermal ablation methods, is usually applied based on the fixed parameters of power and duration. As a result, too high temperature or overheating might not be avoided and excessive heating might cause some additional side effects to normal tissues...
2018: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29576786/malignant-hyperthermia-report-of-two-cases-with-a-neglected-complication-in-cardiac-surgery
#20
Mahdi Neshati, Manizheh Azadeh, Parinaz Neshati, Tyrone Burnett, Ryan Saenz, Bahman Karbasi, Ghader Shahmohammadi, Eskandar Nourizadeh, Mohsen Rostamzadeh
Malignant hyperthermia (MH) can develop after contact with volatile anesthetics (halothane, enflurane, isoflurane, sevoflurane, and desflurane) as well as succinylcholine and cause hypermetabolism during anesthesia, which is associated with high mortality when untreated. Early diagnosis and treatment could be life-saving. During cardiac surgery, hypothermia and cardiopulmonary bypass make the diagnosis of MH extremely challenging compared with other settings such as general surgery. We herein report 2 cases of MH, graded as "very likely" or "almost certain" based on the MH clinical grading scale...
October 2017: Journal of Tehran Heart Center
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