View clinical trials related to Thromboembolism.
Filter by:Obstructive sleep apnea (OSA) is a clinical syndrome characterized by repetitive closure of the airway and frequent awakenings during sleep. Repeated episodes of hypoxia, decrease in intrathoracic pressure, increased venous return and venous stasis, damage to vascular wall may ensue. An increased tendency for coagulation has also been reported in OSA. Venous stasis, vascular endothelial activation and hypercoagulability are also known risk factors for thromboembolism. All of these pathophysiologic changes in OSA may predispose patients for the development of pulmonary embolism (PE) however there is limited data about role of thromboembolic events in OSA.
Patients with cerebral hemorrhage (ICH) have a high risk of venous thromboembolism. Intermittent pneumatic compression combined with elastic stockings have been shown to be superior to elastic stockings alone in reducing the rate of asymptomatic deep vein thrombosis after ICH in a randomized trial (4.7% vs. 15.9%). Graduated compression stockings alone are ineffective in preventing deep vein thrombosis in patients with ischemic or hemorrhagic stroke. Less clear is the role of anticoagulation in the prevention of venous thromboembolism in patients with ICH because the use of anticoagulants may cause an enlargement of the hematoma. In a multicenter, randomized trial, the investigators will assess the efficacy and safety of enoxaparin in the prevention of venous thromboembolism in patients with spontaneous intracerebral hemorrhage. Enoxaparin (40 mg once daily) or standard therapy (graduated compression stockings and/or intermittent pneumatic compression and/or early mobilization) will be given subcutaneously for not less than 10 days beginning after 72 hours from stroke onset.
Venous thromboembolism (VTE) has harmful effects on morbidity and mortality of cancer patients. In Western VTE guidelines, all solid cancer patients receiving abdominal major surgery are strongly recommended to receive pharmacologic prophylactic anticoagulation such as low molecular weight heparin (LMWH) in the perioperative periods. These recommendations are based on the high incidence of postoperative VTE development in Western cancer patients. However, there have been many cumulative data about the effect of different ethnicity on the VTE development and more and more investigators and clinicians admit that Asian ethnicity has lower incidence of VTE than Western ethnicity. Therefore, it may not be advisable to apply Western guidelines as it is to the clinical situation of Asian cancer patients. Although colorectal cancer (CRC) is one of the common cancers and the incidence is rapidly increasing in Asia, there have been few prospective data on the incidence of VTE development during the postoperative period in Asian CRC patients. To our knowledge, there have been a few small-sized prospective studies in Asia and thus clear conclusions could have not been drawn based on those studies. Most Korean colorectal surgeons think that the incidence of postoperative VTE development is very rare based on their own clinical experiences. They also have much concern about the complications such as bleeding that might be caused by routine use of pharmacologic thromboprophylaxis during the perioperative periods. Therefore, in most clinical situation, many Korean colorectal surgeons do not perform perioperative pharmacologic thromboprophylaxis using LMHW. Considering these clinical situations in Asia including Korea, the uncritical acceptance of Western guidelines may be inappropriate. The necessity of pharmacologic thrombo-prophylaxis can be answered only from our own prospective study on the incidence of postoperative VTE development after CRC surgery. Moreover, current surgical trend in cancer patients is minimally invasive approach such as laparoscopic surgery. However, the necessity of pharmacologic thromboprophylaxis in patients receiving laparoscopic cancer surgery has not been evaluated even in Western countries. Western guidelines also cannot exactly answer whether pharmacologic thromboprophylaxis is really necessary in cancer patients receiving laparoscopic cancer surgery. On above backgrounds, this study was designed.
Experiments suggest that during treatment with vitamin K antagonists (VKA) the activity of coagulation factors (F) II and X better reflect anticoagulation than does FVII. Based on this a new prothrombin time based monitoring test (Fiix-PT) has been invented which is only sensitive to FII and FX. The Fiix-PT can be converted to INR ("Fiix-INR"). The investigators hypothesize that the Fiix-PT may reflect anticoagulation and the antithrombotic effect of VKA as accurately or better than the current PT based tests do (INR based on PT or P&P). The protocol describes a prospective randomized double-blind trial that will be conducted at the Landspitali Anticoagulation Management Center (AMC). The objective of the protocol is to evaluate the efficacy and safety of Fiix-INR as a monitoring test compared to the current PT based assays (INR) used to monitor patients treated with VKA to prevent thromboembolism. The investigators will randomize 1200 clients of the AMC into two identically sized monitoring groups, Fiix-INR (test group) and INR (control group). The clinical endpoints to be studied include efficacy (arterial and venous thromboembolic event rate) and safety (bleeding events). Additionally, surrogate convenience endpoints will be studied such as test frequency and time within target range.
The aim of this study is to determine if by providing a collaborative, integrated pathway-based healthcare compared to the usual healthcare, whether or not this would be superior in reducing the length of hospital stay across five high frequency /high risk medical diagnoses: Acute Venous Thromboembolism, Acute Kidney Injury, Community Acquired Pneumonia, Adult Left Ventricular Heart Failure, and Asthma.
The main objective of this study is to evaluate, for 15 healthy volunteers and for 15 patients with a history of venous thromboembolism (VTE), the monthly variation (over 6 months) of plasma nucleosome and free DNA concentrations.
In this study the investigators compare the diagnostic validity of Bedside Ultrasonography of chest and Pulmonary artery CT Angiography in the patients who came to Emergency Department of Alzahra General Hospital from 1 may 2012 to 1 October 2012 with respiratory symptoms and signs in favor of Pulmonary Thromboemboli (PTE).
There are many different views regarding ideal duration and type of thromboprophylaxis after hip or knee surgery. An important factor in Fast-track surgery is early mobilization, which in itself is thought to prevent clotting. The investigators hypothesize that there is no increase with regards to thrombosis in patients receiving fast-track surgery with early mobilization and chemical thrombosis prophylaxis only during hospitalization.
The study aims to compare the value of contrast medium enhanced post mortem CT to classic autopsy.
In selected patients with acute pulmonary embolism(PE), low dose (50mg/2h) recombinant tissue plasminogen activator (rt-PA) regimen had been reported to have less bleeding tendency than the FDA-approved rt-PA 100mg/2h regimen 100mg/2h regimen (3% vs.10%), it is worthwhile to reveal whether low dose rt-PA plus low molecular weight heparin (LMWH) can rapidly reverses RV pressure overload in PE, but not increase bleeding and other adverse events. The aim of the study is to compare thrombolytic treatment with LMWH in patients with acute normotensive PE with right ventricular dysfunction(RVD).