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Coagulation monitoring

Chi Zhang, Peizhe Zhang, Hongxia Li, Lianhua Han, Lei Zhang, Lei Zhang, Xiangjun Yang
OBJECTIVES: Dabigatran etexilate is widely used for stroke prevention in the patients with atrial fibrillation. The anticoagulation activity of dabigatran is not necessary monitored in routine clinical practice. We aimed to study the effect of dabigatran on thrombin generation (TG) and coagulation assays in rabbit and human plasma. METHODS: Rabbits received different concentrations of dabigatran etexilate (5 mg/kg, 10 mg/kg). Patients with atrial fibrillation took 110 mg dabigatran etexilate twice daily...
March 15, 2018: Thrombosis Research
Hongbo Chang, Jianning Zhang, Weidong Cao, Yaming Wang, Hulin Zhao, Rui Liu, Shengli Guo
The present study evaluated drug distribution and clinical safety in treating patients with cystic craniopharyngioma (CP) with intracavitary radiotherapy using phosphorus-32 (32 P) colloid. In total, 40 patients who were recently diagnosed with primary or recurrent cystic CP were enrolled into the study. Patients underwent stereotactic intracavitary therapy and were administered32 P colloid and iopamidol-300 (1:1 dilution). Head computed tomography (CT) scans were performed 2 h after surgery in order to assess drug distribution and leakage...
April 2018: Oncology Letters
Andrea Padoan, Laura Sciacovelli, Ada Aita, Giorgia Antonelli, Mario Plebani
BACKGROUND: Measurement uncertainty (MU) estimation has been introduced by ISO 15189 for the accreditation of clinical laboratories. Although MU reporting is not required, its inclusion in medical reports is of potential assistance to physicians in results interpretation. METHODS: MU reporting was evaluated with respect to different test purposes, namely comparison with reference intervals (RI), patient monitoring or comparison with clinical decision limits. Clinical Biochemistry, Hematology, Coagulation and Clinical Immunology measurands were used as examples...
March 13, 2018: Clinical Biochemistry
Helen V Wilmot, Jason Hockley, Peter Rigsby, Elaine Gray
Until recently, the role of factor XII (FXII) in hemostasis was not considered to be important since patients with FXII deficiency do not present with bleeding. The activation of FXII by agents including mast cells and platelet polyphosphates suggests that it may have a role in thrombogenesis. The inhibition of FXII therefore presents an option for antithrombotic therapy, and antibodies and inhibitors are already in development. Assays for FXII will be required to support these technologies, and an international standard (IS) for FXII would be useful for the development of these methods and for the clinical monitoring of patients...
2018: Frontiers in Medicine
Qiang Wang, Akram A Da'dara, Patrick J Skelly
BACKGROUND: Schistosomes are blood dwelling parasitic worms that cause the debilitating disease schistosomiasis. Here we examined the influence of the parasites on their external environment by monitoring the impact of adult Schistosoma mansoni worms on the murine plasma proteome in vitro and, in particular, on how the worms affect the blood coagulation protein high molecular weight kininogen (HK). METHODS: Following the incubation of adult schistosomes in murine plasma, two-dimensional differential in-gel electrophoresis (2D-DIGE) was conducted to look for changes in the plasma proteome compared with control plasma...
March 14, 2018: Parasites & Vectors
Penny S Reynolds, Bernard J Fisher, Jacquelyn McCarter, Christopher Sweeney, Erika J Martin, Paul Middleton, Matthew Ellenberg, Evan Fowler, Donald F Brophy, Alpha A Fowler, Bruce D Spiess, Ramesh Natarajan
BACKGROUND: Coagulopathy and inflammation induced by hemorrhagic shock and traumatic injury are associated with increased mortality and morbidity. Vitamin C (VitC) is an antioxidant with potential protective effects on the pro-inflammatory and pro-coagulant pathways. We hypothesized that high-dose VitC administered as a supplement to fluid resuscitation would attenuate inflammation, coagulation dysfunction, and end-organ tissue damage in a swine model of polytrauma and hemorrhage. METHODS: Male Sinclair swine (n = 24; mean body weight 27 kg) were anesthetized, intubated, mechanically ventilated, and instrumented for physiological monitoring...
March 12, 2018: Journal of Trauma and Acute Care Surgery
Sanne L N Brouns, Johanna P van Geffen, Johan W M Heemskerk
In recent years, considerable progress has been made in understanding the mechanisms involved in platelet activation during hemostasis and thrombosis. Parallel-plate flow chambers and other microfluidic devices have markedly contributed to this insight. Conversely, such flow devices are now increasingly used to monitor the combined processes of platelet aggregation, thrombus formation, and coagulation in human blood. Currently, by combining microspotting and multi-color fluorescence microscopy, this technology offers the capability of high-throughput measurement of platelet activation processes, even in small blood samples...
March 14, 2018: Platelets
Vacis Tatarunas, Algirdas Voleisis, Reimondas Sliteris, Rymantas Kazys, Liudas Mazeika, Vaiva Lesauskaite
PURPOSE: For long time, blood clot retraction was measured only by thromboelastographic or platelet contractile force measurement techniques. The purpose of the present study was development of a novel ultrasonic method based on simultaneous monitoring of variations in the ultrasound velocity and the frequency spectrum of the signal propagating in clotting blood and its application for automatic evaluation of blood clotting parameters. METHODS: Simultaneous measurement of ultrasound velocity and variations in the frequency spectrum of wideband ultrasonic signals in clotting blood samples was performed...
March 13, 2018: Journal of Medical Ultrasonics
Kazuhiro Toyama, Atsushi Yasumoto, Fumihiko Nakamura, Shunya Arai, Mineo Kurokawa
Acquired hemophilia A (AHA) is a hemorrhagic disorder. Whether or not severe thrombotic events can develop without the use of bypassing agents in AHA patients is unclear. An 80-year-old woman with AHA underwent immunosuppressive therapy with prednisolone at 1 mg/kg daily. After achieving remission, she suddenly developed multiple organ failure due to acute systemic thrombosis and died within a few hours of the diagnosis. Patients with AHA, especially those with risk factors for thrombosis, have a considerable risk of developing thrombosis during the recovery phase of factor VIII activity and should be carefully monitored by coagulation testing...
March 9, 2018: Internal Medicine
Mercedes García Carrillo, Mariana Ferrario, Sandra Guerrero
The aim of this study was to analyze the effectiveness of UV-C light (0-10.6 kJ/m2 ) assisted by mild heat treatment (50 °C) on the inactivation of Saccharomyces cerevisiae KE 162 in peptone water and fresh carrot-orange juice blend (pH: 3.8; 9.8°Brix; 707 NTU; absorption coefficient: 0.17 cm-1 ). Yeast induced damage by single UV-C and mild heat (H) and the combined treatment UV-C/H, was investigated by flow cytometry (FC) and transmission electron microscopy (TEM). When studying induced damage by FC, cells were labeled with fluorescein diacetate (FDA) and propidium iodide (PI) to monitor membrane integrity and esterase activity...
August 2018: Food Microbiology
Reiko Ashida, Ken-Ichi Kawabata, Takashi Maruoka, Kazuhiro Yamanaka, Hideki Yoshikawa, Tatsuya Ioka, Kazuhiro Katayama, Sachiko Tanaka
Bubble-seeded histotripsy (BSH) is a newly developed ultrasound-based mechanical fractionation technique using locally injected phase change nanodroplets (PCNDs) as sensitizers. The PCNDs are a kind of microbubble precursor compressed into submicron-size in droplets form, which were designed for local administration and will expand into microbubbles under ultrasound exposure. Previously, we reported that a combination of PCNDs injection and pulsed high-intensity focused ultrasound (pHIFU) with an acoustic intensity as low as about 3 kW/cm2 at 1...
March 7, 2018: Ultrasound in Medicine & Biology
P Vavra, L Karnik, M Skrobankova, J Jurcikova, P Ihnat, P Zonca, M Peteja, A El-Gendi, S Czudek
Liver resection is the standard treatment for any liver lesion. Laparoscopic liver resection is associated with lower intra-operative blood loss and fewer complications than open resection. Access to the posterior part of the right liver lobe is very uncomfortable and difficult for surgeons due the anatomic position, especially when employing laparoscopic surgery. Based on these experiences, a new laparoscopic device was developed that is capable of bending its long axis and allowing the application of radiofrequency energy in areas that were not technically accessible...
March 1, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
Manish Bhatt, Emmanuel Montagnon, Francois Destrempes, Boris Chayer, Siavash Kazemirad, Guy Cloutier
Deep vein thrombosis is a common vascular disease that can lead to pulmonary embolism and death. The early diagnosis and clot age staging are important parameters for reliable therapy planning. This article presents an acoustic radiation force induced resonance elastography method for the viscoelastic characterization of clotting blood. The physical concept of this method relies on the mechanical resonance of the blood clot occurring at specific frequencies. Resonances are induced by focusing ultrasound beams inside the sample under investigation...
March 6, 2018: Physics in Medicine and Biology
Clara Elisa Frare de Avelar Teixeira, Angélica de Fátima de Assunção Braga, Franklin Sarmento da Silva Braga, Vanessa Henriques Carvalho, Rafael Miranda da Costa, Giselle Ioná Teixeira Brighenti
INTRODUCTION: Klippel-Trenaunay syndrome is a rare congenital vascular disease characterized by cutaneous hemangiomas, varicosities, and limb asymmetry, which may evolve with coagulation disorders and hemorrhage as more frequent complications in pregnant patients. Pregnancy is not advised in women with this syndrome due to increased obstetric risk. CASE REPORT: Female patient, 29 years old, 99kg, 167cm, BMI 35.4kg.m-2 , physical status ASA III, with 27 weeks of gestational age and diagnosis of Klippel-Trenaunay syndrome...
March 2, 2018: Revista Brasileira de Anestesiologia
Chi-Kuang Sun, Hui-Yuan Chen, Tzu-Fang Tseng, Borwen You, Ming-Liang Wei, Ja-Yu Lu, Ya-Lei Chang, Wan-Ling Tseng, Tzung-Dau Wang
Atherosclerotic plaque rupture or erosion and subsequent development of platelet-containing thrombus formation is the fundamental cause of cardiovascular disease, which is the most common cause of death and disability worldwide. Here we show the high sensitivity of 200-270 GHz T-ray to distinguish thrombus formation at its early stage from uncoagulated blood. A clinical observational study was conducted to longitudinally monitor the T-ray absorption constant of ex-vivo human blood during the thrombus formation from 29 subjects...
March 2, 2018: Scientific Reports
Zida Li, Yize Wang, Xufeng Xue, Brendan McCracken, Kevin Ward, Jianping Fu
Coagulation monitoring is essential for perioperative care and thrombosis treatment. However, existing assays for coagulation monitoring have limitations such as a large footprint and complex setup. In this work, we developed a miniaturized device for point-of-care blood coagulation testing by measuring dynamic clot retraction force development during blood clotting. In this device, a blood drop was localized between a protrusion and a flexible force-sensing beam to measure clot retraction force. The beam was featured with micropillar arrays to assist the deposition of carbon nanotube films, which served as a strain sensor to achieve label-free electrical readout of clot retraction force in real time...
February 27, 2018: ACS Sensors
Mohit Sharma, Smitha Sammith Shetty, Raghu Radhakrishnan
BACKGROUND: Oral submucous fibrosis is an oral potentially malignant disorder with high incidence of malignant transformation and rising global prevalence. However, the genesis of oral submucous fibrosis is still unclear despite superfluity of literature. In the background of ineffective treatment, it is necessary to decode its onset and progression before designing customized treatment regimens. OBJECTIVE: The objective of this article is to decipher the pathogenesis of oral submucous fibrosis in order to identify novel drug targets...
February 26, 2018: Recent Patents on Anti-cancer Drug Discovery
O Arango, M Castillo
At present, selection of cutting time during cheesemaking is made based on subjective methods, which has effects on product homogeneity and has prevented complete automation of cheesemaking. In this work, a new method for inline monitoring of curd firmness is presented. The method consisted of developing a model that correlates the backscatter ratio of near infrared light during milk coagulation with the rheological storage modulus. The model was developed through a factorial design with 2 factors: protein concentration (3...
February 21, 2018: Journal of Dairy Science
Martijn van Griensven, Daniel Ricklin, Stephanie Denk, Rebecca Halbgebauer, Christian K Braun, Anke Schultze, Felix Hönes, Sofia Koutsogiannaki, Alexandra Primikyri, Edimara Reis, David Messerer, Sebastian Hafner, Peter Radermacher, Ali-Reza Biglarnia, Ranillo R G Resuello, Joel V Tuplano, Benjamin Mayer, Kristina Nilsson, Bo Nilsson, John D Lambris, Markus Huber-Lang
Trauma-induced hemorrhagic shock (HS) plays a decisive role in the development of immune, coagulation, and organ dysfunction often resulting in a poor clinical outcome. Imbalanced complement activation is intricately associated with the molecular danger response and organ damage after HS. Thus, inhibition of the central complement component C3 as turnstile of both inflammation and coagulation is hypothesized as a rational strategy to improve the clinical course after HS.Applying intensive care conditions, anaesthetized, monitored, and protectively ventilated non-human primates (NHP; cynomolgus monkeys) received a pressure-controlled severe HS (60 min at MAP 30 mmHg) with subsequent volume resuscitation...
February 14, 2018: Shock
Jelle Vandersteene, Edward Baert, Stijn Schauvliege, Kimberley Vandevelde, Frank Dewaele, Filip De Somer, Dirk Van Roost
The ventriculosinus shunt is a promising treatment for hydrocephalus. Currently, different shunt techniques exist, and it is not clear whether one is preferable. This pilot study reports on a non-hydrocephalic goat model (Saanen breed) that provides opportunities to evaluate and optimize several aspects of the ventriculosinus shunt technique. Analysis of the coagulation properties of 14 goats by a viscoelastic coagulation monitor showed that goats have a hypercoagulable state compared to humans. This property can be partially counteracted by antiplatelet drugs...
January 1, 2018: Laboratory Animals
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