View clinical trials related to Hemorrhage.
Filter by:This study aims to determine the inter- and intra-variability of Transcranial Doppler (TCD) ultrasound in neuro-critical care patients who are planned for consecutive daily TCD evaluations.
Aneurysmal subarachnoid hemorrhage (aSAH) has a high incidence of mortality and significant morbidity, with mortality exceeding 30% in the first two days.The initial injury is related to increasing intracranial pressure, cerebral edema, and neuronal injuries associated with the release of iron. Iron has been shown to increase the incidence of cerebral edema, ischemia, and formation of hydrocephalus. Deferoxamine mesylate (DFO), a hydrophilic chelator, creates a stable complex with free iron thus preventing the formation of iron related free radicals. This trial will evaluate the safety and efficacy of clinical deferoxamine for the treatment of aSAH for patients that are admitted to the hospital at the University of Michigan or Peking University Health Science Center. Eligible participants will be enrolled and randomized to 1 of 2 doses of Deferoxamine or placebo (saline). Information regarding the patients will be collected and followed for up to 6 months post discharge.
Clinician counseling for implant users should involve an explanation of the likelihood of irregular bleeding and the possibility of continued or frequent bleeding throughout three years of use. If that counseling does not provide specifics of the actual distribution of bleeding patterns described in published literature, there remains the real possibility of biased or directed counseling, leading to an inaccurate and exaggerated expectation of potential bleeding changes. This study aims to evaluate if a standardized script accompanied by a visual aid regarding expected bleeding profiles, with intention to remove any possibility of negative or positive framing, could change users' expectations and satisfaction with their method, leading to lower discontinuation rates.
This study will evaluate whether non-invasive auricular vagal nerve stimulation lowers inflammatory markers, and improves outcomes following spontaneous subarachnoid hemorrhage.
Hyponatremia is defined as a plasma sodium concentration below 135 mmol / L. This is a common occurrence (20-50%) during subarachnoid hemorrhage (SAH). Its appearance is often associated with vasospasm. It is associated with an increase in morbidity and mortality linked to induced neurological disorders. Hyponatremia is caused by two etiologies: the syndrome of inappropriate secretion of anti-diuretic hormone (SIADH), and the cerebral salt wasting syndrome, CSWS. Theoretically, these two entities are differentiated by the patient's volemia; in practice, this parameter is difficult to measure. In addition, the correction of hyponatremia is diametrically opposed according to its mechanism: water restriction in the case of SIADH, sodium intake in the event of CSWS. Urea is offered as a second-line treatment in the event of treatment failure to correct hyponatremia. However, the efficacy of this treatment is based on small, observational, retrospective studies. Moreover, the mechanism of action of urea remains poorly understood: it could be a hyperosmolar effect or passive renal reabsorption of sodium.
This is an observational study in neurocritical care units at University of California San Francisco Medical Center (UCSFMC), Zuckerberg San Francisco General Hospital (ZSFGH), and Duke University Medical Center. In this study, the investigators will primarily use the monitor mode of the Transcranial Doppler (TCD, non-invasive FDA approved device) to record cerebral blood flow velocity (CBFV) signals from the Middle Cerebral Artery and Internal Carotid Artery. TCD data and intracranial pressure (ICP) data will be collected in the following four scenarios. Each recording is up to 60 minutes in length. Multimodality high-resolution physiological signals will be collected from brain injured patients: traumatic brain injury, subarachnoid and intracerebral hemorrhage, liver failure, and ischemic stroke. This is not a hypothesis-driven study but rather a signal database development project with a goal to collect multimodality brain monitoring data to support development and validation of algorithms that will be useful for future brain monitoring devices. In particular, the collected data will be used to support: Development and validation of noninvasive intracranial pressure (nICP) algorithms. Development and validation of continuous monitoring of neurovascular coupling state for brain injury patients Development and validation of noninvasive approaches of detecting elevated ICP state. Development and validation of approaches to determine most likely causes of ICP elevation. Development and validation of approaches to detect acute cerebral hemodynamic response to various neurovascular procedures.
Deficits in memory, executive function, and language are common cognitive sequelae of aneurysmal subarachnoid hemorrhage (aSAH). Previous study demonstrated that post-treatment antiplatelet therapy reduced risk for delayed cerebral ischemia caused by aSAH. However, the effect of antiplatelet therapy on cognition after aSAH is unclear. The aim of this study was to assess the effect of antiplatelet therapy on cognition after aSAH.
Variceal hemorrhage is the serious complication in patients with compensated advanced chronic liver disease (cACLD). To evaluate the bleeding risk of varices, esophagogastroduodenoscopy (EGD) should be performed. However, EGD is limited by its invasiveness and uncomfortableness. The Baveno VI criteria recommended that EGD could be spared in patients with liver stiffness (LS) based on transient elastography (TE) < 20 kPa and platelet count >150000/mm3. However, only 30% of patients can spare EGD. In order to expand the screening criteria, Expanded-Baveno VI proposed that by using LS (TE)<25 kPa and platelet count >110000/mm3, 40% of patients can safely avoid EGD. It is worth noting that the Baveno VI criteria is based on the European and American compensatory cirrhosis cohort (55% for hepatitis C, 14% for non-alcoholic steatohepatitis, 13% for alcoholic hepatitis, 8% for hepatitis B), Expanded-Baveno VI is also of good diagnostic value for hepatitis C, alcoholic, and non-alcoholic steatohepatitis of cACLD. About 257 million people worldwide are infected with hepatitis B virus, and about 80 million people in China alone are infected with hepatitis B virus. Infected with hepatitis B virus is the main etiology of patients with cACLD in china. Hence, Baveno VI and Expanded-Baveno VI may not be suitable for patients with hepatitis B virus-dominant cACLD. Previous studies have shown that LS has a significant correlation with the severity of portal hypertension. Nevertheless, LS only has a good correlation with portal pressure in the early stage of portal hypertension (hepatic vein pressure gradient ≤10mm Hg), because liver fibrosis is the main cause of portal hypertension in this period. In the late stage of liver cirrhosis, the involvement of hyperdynamic circulation and increased portal blood flow, spleen stiffness (SS) may have a better correlation with HVPG than that of LS. Therefore, SS provides a reliable basis for the hemodynamic changes that occur during the development of liver cirrhosis and avoids the limitations caused by the measurement of LS. Previous study has found that changes in SS before and after non-selective beta-blockers (NSBBs) as primary prophylaxis may be a promising non-invasive tool for predicting hemodynamic response in patients with high-risk varices. Since SS is much higher than LS, the maximum threshold of 75 kPa measured with TE may not be sufficient to evaluate the hardness of the spleen. Meanwhile, numerous studies have found that the success rate of measuring SS and LS based on 2D-SWE is higher than that of TE. Hence, CHESS2004 study aims to establish a standard for predicting high-risk varices that is more suitable in patients with hepatitis B virus-dominant cACLD. In addition, non-invasive means of SS is used to evaluate the hemodynamic response of patients with high-risk varices receiving prophylaxis NSBBs therapy.
Bleeding after Mohs micrographic surgery for skin cancer is a low risk complication that can occur. This study aims to determine the effect of a drug, often used to reduce bleeding, called tranexamic acid when applied topically to the skin wound after surgery.
Injury is the leading cause of death for people between the ages of 1-44. This is especially true in trauma patients who have bleeding complications. Acute trauma coagulopathy (ATC) is associated with high transfusion requirements, longer ICU stays, and a greater incidence of multi-organ dysfunction. The cause of coagulopathy is multi-factorial. One major driver is acquired fibrinogen deficiency (hypofibrinogenemia). Fibrinogen is critical in clot formation and enhances platelet aggregation. Due to the body's limited reserve, it is the first clotting factor to fall to critical levels during life-threatening bleeding. This can impair coagulation and increases bleeding complications. There are two primary options available for fibrinogen supplementation: - Cryoprecipitate- North American standard - Fibrinogen Concentrate (FC)- European standard Consumption of coagulation factors, including fibrinogen, is another important component of ATC. To replenish these depleted coagulation factors and improve thrombin generation, two therapies are available: - Frozen Plasma (FP)- North American standard - Prothrombin Complex Concentrate (PCC)- European standard Strategies for hemorrhage and coagulopathy treatment have changed significantly over the last decade. Prompt hemorrhage control, along with targeted coagulation factor replacement, are emerging as key components of trauma care. Currently, the initiation of a massive hemorrhage protocol (MHP) results in red blood cells (RBCs) and FP transfusions in a 1:1 or 2:1 ratio. Clotting factors are replaced via FP administration. Fibrinogen supplementation is administration after lab verification or at the clinician's discretion. MHP continues until the rate of hemorrhage is under control. FC and PCC have several important advantages over cryoprecipitate and FP but there is a scarcity of data regarding their efficacy and safety of their use in hemorrhaging trauma patients. The FiiRST-2 study aims to understand if early use of FC and PCC in trauma patients at risk of massive hemorrhage will lead to superior patient outcomes. This trial will also provide safety data on early administration of FC and PCC as a first-line hemostatic therapy in trauma care, and its impact on hemostatic and other clinical endpoints.