keyword
MENU ▼
Read by QxMD icon Read
search

Blood clots

keyword
https://www.readbyqxmd.com/read/28742964/conformational-flexibility-and-self-association-of-fibrinogen-in-concentrated-solutions
#1
Yuriy F Zuev, Rustem I Litvinov, Alexander E Sitnitsky, Bulat Z Idiyatullin, Dilyafruz R Bakirova, Dennis Galanakis, Artem Zhmurov, Valeri Barsegov, John W Weisel
We studied the hydrodynamic behavior of fibrinogen, a blood plasma protein involved in blood clotting, in a broad 0.3-60 mg/ml range of concentration and 5-42°C temperature using pulsed-field gradient 1H NMR-diffusometry. Arrhenius plots revealed the activation energy for fibrinogen diffusion Ed = 21.3 kJ/mol at 1.4 mg/ml and 28.4 kJ/mol at 38 mg/ml. We found a dramatic slowdown in fibrinogen self-diffusion with concentration beginning at 1.7-3.4 mg/ml, which deviated from the standard hard-particle behavior, suggesting a remarkable intermolecular entanglement...
July 25, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28742256/effect-of-chenopodium-ambrosioides-on-the-healing-process-of-the-in-vivo-bone-tissue
#2
Elizandra Silva da Penha, Rogério Lacerda-Santos, Maria Goretti Freire de Carvalho, Patrícia Teixeira de Oliveira
The focus of this double-blind randomized study was on evaluating the effect of an aqueous extract of Mastruz (Chenopodium ambrosioides L.) on the bone repair process in vivo. In total, 36 male Wistar rats were randomly selected for this study, and divided into 3 groups (n = 12): Group HS (Hemostatic Sponge), Group SM (Hemostatic Sponge with Mastruz) and Group BC (Blood Clot). In each animal, bone defects measuring 2 mm in diameter were performed in both tibias for placement of the substances. After 3 and 10 days, the animals were sacrificed, and the tissues were analyzed under an optical microscope relative to the following events: inflammatory infiltrate; necrosis; young fibroblasts; osteoclastic and osteoblastic activity; endosteal and periosteal bone formation; and bone repair...
July 25, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28741596/the-response-of-mri-contrast-parameters-in-i-in-vitro-i-tissues-and-tissue-mimicking-phantoms-to-fractionation-by-histotripsy
#3
Steven Paul Allen, Eli Vlaisavljevich, Jiaqi Shi, Luis Hernandez-Garcia, Charles A Cain, Zhen Xu, Timothy L Hall
Histotripsy is a non-invasive, focused ultrasound lesioning technique that can ablate precise volumes of soft tissue using a novel mechanical fractionation mechanism. Previous research suggests that magnetic resonance imaging (MRI) may be a sensitive image-based feedback mechanism for histotripsy. However, there are insufficient data to form some unified understanding of the response of the MR contrast mechanisms in tissues to histotripsy. In this paper, we investigate the response of the MR contrast parameters R1, R2, and the apparent diffusion coefficient (ADC) to various treatment levels of histotripsy in in-vitro porcine liver, kidney, muscle, and blood clot as well in formulations of bovine red blood cells suspended in agar gel...
July 25, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28741113/approaches-to-prevent-bleeding-associated-with-anticoagulants-current-status-and-recent-developments
#4
REVIEW
Manu Thomas Kalathottukaren, Charles A Haynes, Jayachandran N Kizhakkedathu
Anticoagulants are widely used for the prophylaxis and treatment of cardiovascular disorders and to prevent blood clotting during surgeries. However, the major limitation associated with anticoagulant therapy is bleeding; all the current anticoagulants do have a bleeding risk. The propensity to bleed is much higher among the elderly population and patients with renal insufficiency. Therefore, there is an utmost and urgent clinical need for a highly efficient, nontoxic antidote with excellent anticoagulant reversal activity...
July 24, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28739377/blood-hemostatic-changes-during-an-ultraendurance-road-cycling-event-in-a-hot-environment
#5
Brian R Kupchak, Josh B Kazman, Jakob L Vingren, Danielle E Levitt, Elaine C Lee, Keith H Williamson, Lawrence E Armstrong, Patricia A Deuster
OBJECTIVE: This study aims to examine blood hemostatic responses to completing a 164-km road cycling event in a hot environment. METHODS: Thirty-seven subjects (28 men and 9 women; 51.8±9.5 [mean±SD] y) completed the ride in 6.6±1.1 hours. Anthropometrics (height, body mass [taken also during morning of the ride], percent body fat [%]) were collected the day before the ride. Blood samples were collected on the morning of the ride (PRE) and immediately after (IP) the subject completed the ride...
July 21, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28738216/early-time-related-course-of-image-findings-in-postmortem-mri-typical-findings-and-observer-agreement-in-a-porcine-model
#6
Frank Oliver Henes, Marc Regier, Peter Bannas, Marlen Henker, Axel Heinemann, Jan Sperhake, Philipp G C Begemann, Gerhard Adam, Michael Groth
PURPOSE: To assess early time-related image findings in postmortem magnetic resonance imaging (MRI) and to evaluate observer agreement in a porcine model. MATERIAL AND METHODS: Three pigs were examined by MRI at 15 different time points in the first 36h after death. Two observers independently recorded the postmortem interval (PMI) to the appearance of fluid collection (pleural space, interlobar and interlobular pulmonary fissures and hepatic interlobar fissures), gas accumulation (intrahepatic and intracardial) and blood clotting (aorta and intrahepatic venous vessels)...
July 15, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28738008/randomized-placebo-controlled-study-of-the-effects-of-yunnan-baiyao-on-hemostasis-in-horses
#7
SallyAnne L Ness, Amelia H Frye, Thomas J Divers, Mark Rishniw, Hollis N Erb, Marjory B Brooks
OBJECTIVE To determine effects of oral administration of Yunnan Baiyao on platelet activation, coagulation, and fibrinolysis in healthy horses. ANIMALS 12 healthy adult horses. PROCEDURES In a randomized blinded crossover study that included a 4-week washout period between treatments, horses were orally administered a paste containing Yunnan Baiyao (15 mg/kg) or placebo at 12-hour intervals for 3 days. Blood samples were collected before start of treatment (time 0) and at 24 and 72 hours for a CBC, measurement of fibrinogen concentration, coagulation screening tests, and a panel of assays to assess platelet activation (including ADP- and collagen-induced aggregation and closure times, flow-cytometric variables of platelet-leukocyte aggregates, platelet membrane P-selectin and phosphatidylserine expression, and microparticle release), von Willebrand factor (vWF) concentration, and cofactor activity...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28735835/effect-of-scheduled-second-look-endoscopy-on-peptic-ulcer-bleeding-a-prospective-randomized-multicenter-trial
#8
Soo Jung Park, Hyojin Park, Yong Chan Lee, Chang Hwan Choi, Tae Joo Jeon, Jun Chul Park, Jie-Hyun Kim, Young Hoon Youn, Yu Jin Kim, Jae Hak Kim, Kwang Jae Lee, Sun Gyo Lim, Hyung Gil Kim, Byoung Wook Bang
BACKGROUND AND AIM: This study aimed to investigate the effectiveness of scheduled second-look EGD with endoscopic hemostasis on peptic ulcer rebleeding and sought to identify the risk factors related to the need for second-look EGD. METHODS: We prospectively randomized patients who had endoscopically confirmed bleeding peptic ulcer with stigmata of active bleeding, visible vessel, or adherent clot into 2 groups between August 2010 and January 2013. Hemoclip application or thermal coagulation, and/or epinephrine injection were allowed for initial endoscopic therapy...
July 20, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28734872/modeling-the-cleavage-of-von-willebrand-factor-by-adamts13-protease-in-shear-flow
#9
Brooke Huisman, Masoud Hoore, Gerhard Gompper, Dmitry A Fedosov
Von Willebrand factor (VWF) is a key protein in hemostasis as it mediates adhesion of blood platelets to a site of vascular injury. A proper distribution of VWF lengths is important for normal functioning of hemostatic processes, because a diminished number of long VWF chains may significantly limit blood clotting and lead to bleeding, while an abundant number of long VWFs may result in undesired thrombotic events. VWF size distribution is controlled by ADAMTS13 protease, which can cleave VWF chains beyond a critical shear rate when the chains are stretched enough such that cleavage sites become accessible...
July 19, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28734018/influence-of-cryoprecipitate-factor-xiii-and-fibrinogen-concentrate-on-hyperfibrinolysis
#10
Melissa M Cushing, Meghann M Fitzgerald, Rebecca M Harris, Lars M Asmis, Thorsten Haas
BACKGROUND: Hyperfibrinolysis is a potentially life-threatening condition associated with poor clot integrity and excessive bleeding. Although antifibrinolytics are an effective treatment, more liberal use of these drugs may lead to a prothrombotic risk, and an earlier and potentially safer treatment option would be desirable. Hyperfibrinolysis has been shown to be attenuated by in vitro supplementation of purified human Factor (F)XIII concentrate. Cryoprecipitate represents an alternative source of FXIII and the only approved source of concentrated FXIII in some countries...
July 21, 2017: Transfusion
https://www.readbyqxmd.com/read/28732864/blood-coagulation-evaluation-of-n-alkylated-chitosan
#11
Zihao Chen, Xinpei Yao, Lu Liu, Jing Guan, Mengyuan Liu, Zhihong Li, Jian Yang, Shujie Huang, Jimin Wu, Feng Tian, Miaolei Jing
N-Alkylated chitosan (NACS) may improve the haemostatic efficiency of chitosan (CS). To study its coagulation capability and function, a series of NACS with various carbon chain lengths and substitution degrees (SD) of alkyl groups were synthesized and characterized by FTIR, NMR, and elemental analysis. Haemolysis and toxicity assays revealed that NACS showed good biocompatibility. In vitro blood clotting tests indicated that NACS had better haemostatic activity than CS, of which N-octadecyl CS with 3.85% SD showed the best results...
October 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28732727/multi-analyte-validation-in-heterogeneous-solution-by-elisa
#12
Thangavel Lakshmipriya, Subash C B Gopinath, Uda Hashim, Vikneswaran Murugaiyah
Enzyme Linked Immunosorbent Assay (ELISA) is a standard assay that has been used widely to validate the presence of analyte in the solution. With the advancement of ELISA, different strategies have shown and became a suitable immunoassay for a wide range of analytes. Herein, we attempted to provide additional evidence with ELISA, to show its suitability for multi-analyte detection. To demonstrate, three clinically relevant targets have been chosen, which include 16kDa protein from Mycobacterium tuberculosis, human blood clotting Factor IXa and a tumour marker Squamous Cell Carcinoma antigen...
July 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28731369/experimental-evaluation-of-tranexamic-acid-loaded-porous-starch-as-a-hemostatic-powder
#13
Chaoyun Xi, Liguo Zhu, Yuan Zhuang, Shufang Wang, Guixiang Sun, Yaqian Liu, Deqing Wang
We evaluated the effectiveness of a novel hemostatic powder called Tranexamic Acid-loaded Porous Starch (TAPS) developed recently on blood clotting activity and hemostasis. The effectiveness of TAPS was evaluated by comparing hemostatic properties with those of Quick-acting Styptic Powder (QSP) and Compound Microporous Polysaccharide Haemostatic powder (CMPHP). The blood clotting activities of human blood were analyzed by thromboela-stogram (TEG) assays in vitro. The hemostatic effectiveness in vivo was evaluated using a rat model with hepatic traumatic hemorrhage...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28730545/platelet-first-responders-in-wound-response-cancer-and-metastasis
#14
REVIEW
David G Menter, Scott Kopetz, Ernest Hawk, Anil K Sood, Jonathan M Loree, Paolo Gresele, Kenneth V Honn
Platelets serve as "first responders" during normal wounding and homeostasis. Arising from bone marrow stem cell lineage megakaryocytes, anucleate platelets can influence inflammation and immune regulation. Biophysically, platelets are optimized due to size and discoid morphology to distribute near vessel walls, monitor vascular integrity, and initiate quick responses to vascular lesions. Adhesion receptors linked to a highly reactive filopodia-generating cytoskeleton maximizes their vascular surface contact allowing rapid response capabilities...
July 20, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28727170/entire-papilla-preservation-technique-in-the-regenerative-treatment-of-deep-intrabony-defects-1-year-results
#15
Serhat Aslan, Nurcan Buduneli, Pierpaolo Cortellini
AIM: This study evaluates the clinical performance of a novel tunnel-like surgical technique in the treatment of isolated deep intrabony defects. MATERIAL AND METHODS: Twelve patients presenting with at least one isolated deep intrabony defect received regenerative periodontal treatment with "entire papilla preservation" technique. Access to the intrabony defect for debridement was provided by a bevelled vertical releasing incision positioned in the buccal gingiva of the neighbouring interdental space...
July 20, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28727139/effect-of-solvent-detergent-treated-pooled-plasma-on-fibrinolysis-in-reconstituted-whole-blood
#16
Nicholas H Saadah, Pieter F van der Meer, Herm Jan M Brinkman, Dirk de Korte, Ido J Bontekoe, Herbert H Korsten, Rutger A Middelburg, Johanna G van der Bom, Martin R Schipperus
BACKGROUND: Hyperfibrinolysis has been observed in patients heavily transfused with solvent/detergent-treated pooled plasma (S/D plasma). We compared coagulation and fibrinolytic variables in blood containing S/D plasma with blood containing fresh-frozen plasma (FFP), with and without α2-antiplasmin or tranexamic acid (TXA) supplementation. STUDY DESIGN AND METHODS: Whole blood samples were reconstituted from red blood cells, platelet (PLT) concentrates, and varying mixtures of FFP and S/D plasma...
July 20, 2017: Transfusion
https://www.readbyqxmd.com/read/28723699/intraoperative-bleeding-in-patients-with-osteogenesis-imperfecta-type-iii-treated-by-fassier-duval-femoral-rodding-analysis-of-risk-factors
#17
Pietro Persiani, Maria V Pesce, Lorena Martini, Filippo M Ranaldi, Patrizia D'Eufemia, Anna Zambrano, Mauro Celli, Ciro Villani
The surgical treatment of osteogenesis imperfecta (OI) is negatively influenced by clinical features such as osteoporosis, limb deformities and bone changes caused by bisphosphonate therapy. Blood loss during femoral nailing surgeries in patients with OI is a serious problem. Platelet anomalies have been associated with an elevation of the serum pyrophosphate originating from the platelets during clotting, even if the causality with the platelet dysfunction has not yet been established. To identify predictive risk factors regarding intraoperative bleeding, a retrospective analysis was conducted on 23 patients aged between 6 and 13 years, affected by OI type III, who were treated to correct femoral deformities or to perform an osteosynthesis for femoral shaft fractures, using the Fassier-Duval telescopic nail...
July 18, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28723112/surfen-assembled-graphene-oxide-for-fluorescence-turn-on-detection-of-sulfated-glycosaminoglycans-in-biological-matrix
#18
Yen-Ting Wang, Wei-Lung Tseng
Sulfated glycosaminoglycans (GAGs) not only serve as a biomarker for mucopolysaccharidoses disease but also participate in various biological processes, such as blood clot medication (heparin) and signal transduction (heparan sulfate). However, few fluorescent sensors, such as 1,9-dimethylmethylene blue, have been developed for the detection of sulfated GAGs in the real world. Herein, we fabricated a surfen/few-layer graphene oxide (FLGO) nanocomplex for sensing sulfated GAGs in biological fluids. Surfen molecules are self-assembled onto the surface of FLGO through electrostatic attraction, and their fluorescence was then quenched by the creation of the FLGO-surfen complex (static quenching) and partially combined with the energy transfer from surfen to FLGO (dynamic quenching)...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28721509/maintaining-patency-of-vascular-access-for-haemodialysis
#19
Nicholas Inston, J Al Shakarchi, A Khawaja, R Jones
All types of vascular access, a necessity for haemodialysis, are prone to thrombosis and if untreated this results in failure. Thrombosis results from the combination of impaired blood flow, endothelial and vessel wall injury and a propensity towards pro-coagulative states, either intrinsic or aggravated by dialysis or dehydration. The treatment of access thrombosis relies on removal of the clot (thrombectomy) and treatment of the underlying problem. In most cases this is stenosis secondary to neointimal hyperplasia which can occur early (failure to mature) or later...
July 18, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28719441/fourteen-day-in-vivo-testing-of-a-compliant-thoracic-artificial-lung
#20
David J Skoog, Joshua R Pohlmann, David S Demos, Christopher N Scipione, Amit Iyengar, Rebecca E Schewe, Ahmed B Suhaib, Kelly L Koch, Keith E Cook
The compliant thoracic artificial lung (cTAL) has been studied in acute in vivo and in vitro experiments. The cTAL's long-term function and potential use as a bridge to lung transplantation are assessed presently. The cTAL without anticoagulant coatings was attached to sheep (n = 5) via the pulmonary artery and left atrium for 14 days. Systemic heparin anticoagulation was used. Compliant thoracic artificial lung resistance, cTAL gas exchange, hematologic parameters, and organ function were recorded. Two sheep were euthanized for nondevice-related issues...
July 14, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
keyword
keyword
57591
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"