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https://www.readbyqxmd.com/read/28820759/thromboprophylaxis-in-spinal-surgery
#1
William P Mosenthal, David C Landy, Haroutioun H Boyajian, Olumuyiwa A Idowu, Lewis L Shi, Edwin Ramos, Michael J Lee
STUDY DESIGN: Systematic review and meta-analysis OBJECTIVE.: Determine the incidence of deep vein thrombosis (DVT) and pulmonary embolism (PE) in spinal surgery patients receiving no thromboprophylaxis, mechanoprophylaxis, and chemoprophylaxis. SUMMARY OF BACKGROUND DATA: The incidence of thromboembolic complications after spinal surgery is not well established. While a variety of effective mechanical and chemical thromboprophylaxis interventions exist, their role in spinal surgery remains unclear...
August 17, 2017: Spine
https://www.readbyqxmd.com/read/28816933/breast-cancer-endometrial-cancer-and-cardiovascular-events-in-participants-who-used-vaginal-estrogen-in-the-women-s-health-initiative-observational-study
#2
Carolyn J Crandall, Kathleen M Hovey, Christopher A Andrews, Rowan T Chlebowski, Marcia L Stefanick, Dorothy S Lane, Jan Shifren, Chu Chen, Andrew M Kaunitz, Jane A Cauley, JoAnn E Manson
OBJECTIVE: To determine the association between use of vaginal estrogen and risk of a global index event (GIE), defined as time to first occurrence of coronary heart disease (CHD), invasive breast cancer, stroke, pulmonary embolism, hip fracture, colorectal cancer, endometrial cancer, or death from any cause. METHODS: For this prospective observational cohort study, we used data from participants of the Women's Health Initiative Observational Study, who were recruited at 40 US clinical centers, aged 50 to 79 years at baseline and did not use systemic estrogen therapy during follow-up (n = 45,663, median follow-up 7...
August 14, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28811041/post-thrombotic-syndrome-in-children
#3
Marisol Betensky, Neil A Goldenberg
The post-thrombotic syndrome (PTS) is the most common long-term complication of pediatric deep venous thrombosis (DVT). It is a burdensome condition that can lead to severe disability and poor quality-of-life of affected children. Although its pathophysiology remains poorly understood, it is thought to be the result of chronic venous hypertension. Recent studies have shown that the inflammatory response associated with an acute DVT likely plays a key role in the development of PTS. The Manco-Johnson Instrument and the modified Villalta Scale are the most widely used instruments for the diagnosis of pediatric PTS...
July 24, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28810900/polymer-free-dual-drug-eluting-stents-evaluated-in-a-porcine-model
#4
Bin Zhang, Bo Zheng, Xingang Wang, Qiuping Shi, Jia Jia, Yong Huo, Chunshui Pan, Jingyan Han, Ming Chen
BACKGROUND: Although drug-eluting stents have dramatically reduced the rates of restenosis and target lesion revascularization, they are associated with stent thrombosis (ST), a catastrophic event likely due to delayed endothelialization and chronic inflammation caused by the polymer and the metal scaffolds. To increase the safety and efficacy of stents, polymer-free dual drug-eluting stents (DDES) have been developed. METHODS: A total 160 stents (Bare-metal stents (BMS), polymer-free probucol stents (PrES), sirolimus-eluting stents (SES) and DDES) were randomly implanted in the coronary arteries of 80 pigs...
August 15, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28806210/risk-stratification-for-major-postoperative-complications-in-patients-undergoing-intra-abdominal-general-surgery-using-latent-class-analysis
#5
Minjae Kim, Melanie M Wall, Guohua Li
BACKGROUND: Preoperative risk stratification is a critical element in assessing the risks and benefits of surgery. Prior work has demonstrated that intra-abdominal general surgery patients can be classified based on their comorbidities and risk factors using latent class analysis (LCA), a model-based clustering technique designed to find groups of patients that are similar with respect to characteristics entered into the model. Moreover, the latent risk classes were predictive of 30-day mortality...
August 10, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28805949/the-reversible-p2y12-antagonist-act-246475-causes-significantly-less-blood-loss-than-ticagrelor-at-equivalent-antithrombotic-efficacy-in-rat
#6
Markus Rey, Markus Kramberg, Patrick Hess, Keith Morrison, Roland Ernst, Franck Haag, Edgar Weber, Martine Clozel, Martine Baumann, Eva Caroff, Francis Hubler, Markus A Riederer, Beat Steiner
The P2Y12 receptor is a validated target for prevention of major adverse cardiovascular events in patients with acute coronary syndrome. The aim of this study was to compare two direct-acting, reversible P2Y12 antagonists, ACT-246475 and ticagrelor, in a rat thrombosis model by simultaneous quantification of their antithrombotic efficacy and surgery-induced blood loss. Blood flow velocity was assessed in the carotid artery after FeCl3 -induced thrombus formation using a Doppler flow probe. At the same time, blood loss after surgical wounding of the spleen was quantified...
October 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28803741/the-cardiovascular-toxicity-of-triadimefon-in-early-life-stage-of-zebrafish-and-potential-implications-to-human-health
#7
Hong-Cui Liu, Tian-Yi Chu, Li-Li Chen, Wen-Jun Gui, Guo-Nian Zhu
The health risk of triadimefon (TF) to cardiovascular system of human is still unclear, especially to pesticide suicides population, occupational population (farmers, retailers and pharmaceutical workers), and special population (young children and infants, pregnant women, older people, and those with compromised immune systems) who are at a greater risk. Therefore, firstly we explored the toxic effects and possible mechanism of cardiovascular toxicity induced by TF using zebrafish model. Zebrafish at stage of 48 h post fertilization (hpf) exposed to TF for 24 h exhibited morphological malformations which were further confirmed by histopathologic examination, including pericardial edema, circulation abnormalities, serious venous thrombosis and increased distance between the sinus venosus (SV) and bulbus arteriosus (BA) regions of the heart...
August 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28801633/evaluation-of-novel-factor-xa-inhibitors-from-oxya-chinensis-sinuosa-with-anti-platelet-aggregation-activity
#8
Wonhwa Lee, HeeSeung Lee, Mi-Ae Kim, Joonhyeok Choi, Kyung-Min Kim, Jae Sam Hwang, MinKyun Na, Jong-Sup Bae
The edible grasshopper Oxya chinensis sinuosa is consumed worldwide for its various medicinal effects. The purpose of this study was to investigate potential bioactive antithrombotic and antiplatelet compounds from O. chinensis sinuosa. Five N-acetyldopamine dimers (1-5) were isolated from O. chinensis sinuosa and compounds 1 and 2 were identified as new chemicals with chiral centers at H-2 and H-3 of the benzo-1,4-dioxane structure. Compounds 1-4 were found to have both FXa and platelet aggregation inhibitory activities...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801136/outcomes-of-pharmacomechanical-catheter-directed-thrombolysis-for-acute-and-subacute-inferior-vena-cava-thrombosis-a-retrospective-evaluation-in-a-single-institution
#9
K Ye, J Qin, M Yin, X Liu, X Lu
OBJECTIVE/BACKGROUND: The objective was to assess the mid-term results of pharmacomechanical catheter-directed thrombolysis (PCDT) for symptomatic acute and subacute inferior vena cava (IVC) thrombosis; the risk factors of early thrombosis recurrence and iliocaval patency were also evaluated. METHODS: From January 2010 to December 2015, 54 patients (33 men; mean age 47.1 years) with symptomatic acute and subacute IVC thrombosis were treated with PCDT. Primary technical success (clot lysis ≥ 50% after PCDT), stent-assisted technical success (residual stenosis < 30% after stenting), clinical success (freedom from thrombosis recurrence within 30 days), complications, frequency of post-thrombotic syndrome (PTS; Villalta score ≥ 5), and iliocaval patency were recorded at follow-up evaluation...
August 8, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28800323/platelet-activation-and-erythrocyte-lysis-during-brief-exposure-of-blood-to-pathophysiological-shear-stress-in-vitro
#10
Suvankar Majumdar, Chetan N Patil, Tammy Ladner-Threadgill, Erica Randolph, Greg W Burgreen, John C Kermode
BACKGROUND: Interaction of von Willebrand factor (VWF) with circulating platelets is the trigger for thrombosis in a region of arterial stenosis. These events are typically studied in vitro under conditions where platelets adhere to a VWF-coated surface. Our approach assesses platelet responses in the absence of adhesion. OBJECTIVE: To characterize extent of platelet activation and erythrocyte lysis in an artificial stenosis model. METHODS: Whole blood is perfused through a length of polyetheretherketone tubing that includes an artificial stenosis, comprising narrow-bore (89-381 μm) tubing...
August 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28797741/modelling-and-simulation-of-flow-and-agglomeration-in-deep-veins-valves-using-discrete-multi-physics
#11
M Ariane, W Wen, D Vigolo, A Brill, F G B Nash, M Barigou, A Alexiadis
The hemodynamics in flexible deep veins valves is modelled by means of discrete multi-physics and an agglomeration algorithm is implemented to account for blood accrual in the flow. Computer simulations of a number of valves typologies are carried out. The results show that the rigidity and the length of the valve leaflets play a crucial role on both mechanical stress and stagnation in the flow. Rigid and short membranes may be inefficient in preventing blood reflux, but reduce the volume of stagnant blood potentially lowering the chances of thrombosis...
July 29, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28797069/biodegradability-and-platelets-adhesion-assessment-of-magnesium-based-alloys-using-a-microfluidic-system
#12
Lumei Liu, Youngmi Koo, Boyce Collins, Zhigang Xu, Jagannathan Sankar, Yeoheung Yun
Magnesium (Mg)-based stents are extensively explored to alleviate atherosclerosis due to their biodegradability and relative hemocompatibility. To ensure the quality, safety and cost-efficacy of bioresorbable scaffolds and full utilization of the material tunability afforded by alloying, it is critical to access degradability and thrombosis potential of Mg-based alloys using improved in vitro models that mimic as closely as possible the in vivo microenvironment. In this study, we investigated biodegradation and initial thrombogenic behavior of Mg-based alloys at the interface between Mg alloys' surface and simulated physiological environment using a microfluidic system...
2017: PloS One
https://www.readbyqxmd.com/read/28796444/the-michigan-risk-score-to-predict-peripherally-inserted-central-catheter-associated-thrombosis
#13
Vineet Chopra, Scott Kaatz, Anna Conlon, David Paje, Paul J Grant, Mary A M Rogers, Steven J Bernstein, Sanjay Saint, Scott A Flanders
BACKGROUND: Peripherally inserted central catheters (PICCs) are associated with upper extremity deep vein thrombosis (DVT). We developed a score to predict risk of PICC-related thrombosis. METHODS: Using data from the Michigan Hospital Medicine Safety consortium, image-confirmed upper-extremity DVT cases were identified. A logistic, mixed effects model with hospital-specific random intercepts was used to identify factors associated with PICC-DVT. Points were assigned to each predictor, stratifying patients into four classes of risk...
August 10, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28795138/retransplantation-in-late-hepatic-artery-thrombosis-graft-access-and-transplant-outcome
#14
Bettina M Buchholz, Shakeeb Khan, Miruna D David, Bridget K Gunson, John R Isaac, Keith J Roberts, Paolo Muiesan, Darius F Mirza, Dhiraj Tripathi, M Thamara P R Perera
BACKGROUND: Definitive treatment for late hepatic artery thrombosis (L-HAT) is retransplantation (re-LT); however, the L-HAT-associated disease burden is poorly represented in allocation models. METHODS: Graft access and transplant outcome of the re-LT experience between 2005 and 2016 was reviewed with specific focus on the L-HAT cohort in this single-center retrospective study. RESULTS: Ninety-nine (5.7%) of 1725 liver transplantations were re-LT with HAT as the main indication (n = 43; 43%) distributed into early (n = 25) and late (n = 18) episodes...
August 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28795059/inferior-vena-cava-reconstruction-by-gallbladder-patch-an-experimental-design
#15
Hossein Hodjati, Sahar Sohrabi Nazari, Seifollah Dehghani Nazhvani, Mohammad Yasin Karami, Bita Geramizadeh
OBJECTIVE: To evaluate the efficacy of the gallbladder for reconstruction of the inferior vena cava in a canine model. METHODS: The experimental study was conducted on 5 dogs; an oval window with a diameter of (4×1 cm) was made in the inferior vena cava and then repaired using the autologous gallbladder patch with preservation of gallbladder function. The patency and functionality of the graft were assessed macroscopically and microscopically at 2 months postoperatively...
July 2017: Bulletin of Emergency and Trauma
https://www.readbyqxmd.com/read/28794070/integrin-%C3%AE-iib%C3%AE-3-outside-in-signaling
#16
Tom N Durrant, Marion T van den Bosch, Ingeborg Hers
Integrin αIIbβ3 is a highly abundant heterodimeric platelet receptor that can transmit information bidirectionally across the plasma membrane, and plays a critical role in hemostasis and thrombosis. Upon platelet activation, inside-out signaling pathways increase the affinity of αIIbβ3 for fibrinogen and other ligands. Ligand binding and integrin clustering subsequently stimulate outside-in signaling, which initiates and amplifies a range of cellular events driving essential platelet processes such as spreading, thrombus consolidation and clot retraction...
August 9, 2017: Blood
https://www.readbyqxmd.com/read/28793820/ischemic-conditioning-attenuates-platelet-mediated-thrombosis-a-tale-of-reverse-translation
#17
Karin Przyklenk, Peter Whittaker
Data obtained in both preclinical models and humans have revealed that the favorable cardiac consequences of ischemic conditioning extend beyond a direct effect on the cardiomyocyte. In the current review, we summarize our as-yet limited understanding of the complex relationships between ischemic conditioning, platelet activation-aggregation, and cardioprotection.
September 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28793300/the-burden-of-malignancy-in-a-tertiary-hospital-intensive-cardiovascular-care-unit
#18
Israel Mazin, Shlomi Matetzky, Linor Shemer, Dana Fourey, Paul Fefer, Amit Segev, Arsalan Abu-Much, Roy Beigel, Elad Asher
OBJECTIVES: During the past decade, the most common causes of mortality and morbidity were cardiovascular diseases and malignancies. The aim of the current study was to describe the incidence, course of admission, and short-term (30-day) prognosis of patients with and without malignancy, admitted to a tertiary center intensive cardiovascular care unit (ICCU). METHODS: A prospective observational study of 2,259 patients admitted to the ICCU was conducted between January 2014 and December 2015...
August 10, 2017: Cardiology
https://www.readbyqxmd.com/read/28791355/pegylation-of-lumbrokinase-improves-pharmacokinetic-profile-and-enhances-anti%C3%A2-thrombotic-effect-in-a-rat-carotid-artery-thrombosis-model
#19
Mingji Jin, Guangming Jin, Wei Huang, Zhonggao Gao
The present study aimed to prepare injectable Lumbrokinase (LK) with long circulation time in addition to enhanced anti-thrombotic efficacy. Following preparation, the pharmacokinetic and anti‑thrombotic effect of the drug in a rat carotid artery thrombosis model was evaluated. The drug was prepared by conjugation of LK with mPEG‑SC20000 as previously reported. The pharmacokinetics of the mPEG‑SC20000‑LK were then examined and the anti‑thrombotic activity in an artery‑vein bypass thrombosis rat model was evaluated...
August 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28781241/stent-malapposition-and-the-risk-of-stent-thrombosis-mechanistic-insights-from-an-in-vitro-model
#20
Nicolas Foin, Shengjie Lu, Jaryl Ng, Heerajnarain Bulluck, Derek J Hausenloy, Philip E Wong, Renu Virmani, Michael Joner
AIMS: To examine the effect of under-expansion on stent thrombogenicity with an in-vitro perfusion model. METHOD AND RESULTS: Drug eluting stent (DES) samples were partially under-deployed in silicone tubes and perfused with porcine blood containing 10% Anticoagulant Citrate Dextrose solution for 4 minutes at a flow rate of 200ml/min. Thrombus formation was evaluated and compared between the well apposed and malapposed sections. The malapposed sections showed significantly more thrombus formation compared to the well apposed sections (13...
August 8, 2017: EuroIntervention
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