Active clinical trials for "Hemorrhage"

Spontaneous intracerebral hemorrhage (ICH) remains a significant cause of morbidity and mortality around the globe. The most common etiology of nontraumatic spontaneous ICH is hypertensive arteriopathy (HA), while cerebral amyloid angiopathy (CAA) is the most prevalent cause of spontaneous lobar ICH in the elderly. Both HA and CAA belong to the family of cerebral small vessel disease (cSVD). cSVD involves pathological processes that affect the arteries, arterioles, capillaries, and veins on the surface and beneath the brain. The resultant changes of cSVD in the brain vasculatures can be detected with neuroimaging, includes cerebral microbleeds, white matter hyperintensities, lacunes, dilated perivascular spaces, and brain atrophy. Investigators of this study have probe into various imaging markers in patients with cSVD. Investigators found that the lacune and cerebral microbleeds location was related to distinct underlying etiology of cSVD. Further, investigators utilized amyloid PET study to directly quantified the cerebral amyloid burden, and demonstrated the correlation between amyloid deposition and deep/superficial microbleeds ratio. The association between cerebellum microbleeds, which is a novel marker for cSVD, and the underlying pathology in patient with spontaneous ICH has been investigated. Investigators also summarized and published the current research of different cSVD imaging markers and its implication on patient care. Cerebrovascular reactivity (CVR) represents the phenomenon that cerebral vessels dilate or constrict in response to stimuli, which provides insights into the vascular reserve information. The vascular reserve parameter is complementary to steady-state vascular index, such as cerebral perfusion or other neuroimaging markers. Measurement of CVR using advanced MR techniques is an emerging technique with multiple potential clinical utilities, and impaired autoregulation may contribute to the pathogenesis of cSVD. Recently, diminished CVR under visual stimuli has been linked to vascular amyloid deposits and related vascular dysfunction. Clarifying the mechanism of cSVD-related brain injury would be an important step towards identifying candidate treatment approaches. The goal of this study is to understand the features of CVR in patients with cSVD-related spontaneous ICH, for the purpose of establishing new biomarkers in cSVD diagnosis and understanding the underlying pathophysiology.

Characterizing the impact and treatment of reproductive tract bleeding on women and post-menarchal girls with bleeding disorders. Objectives: This is a cross-sectional observational study of women and girls (WG) with bleeding disorders enrolled in the American Thrombosis and Hemostasis Network (ATHN) dataset. Based on the investigators' study of currently available data of WG with bleeding disorders in the ATHNdataset, the investigators hypothesize that the information currently captured in the core data elements of the ATHNdatasest does not adequately capture data specific to WG with bleeding disorders. Further, the investigators hypothesize that it is feasible for Hemophilia Treatment Centers (HTCs) to include data points specific to WG with bleeding disorder when enrolling participants in the ATHNdataset. This hypothesis will be evaluated through the following specific aims: Specific Aim 1: Characterize reproductive tract bleeding in a cohort of WG with bleeding disorders cared for at US HTCs. Specific Aim 2: Characterize the treatment strategies for and the impact of heavy menstrual bleeding in a cohort of females with bleeding disorders cared for at HTCs. Specific Aim 3: Evaluate the feasibility of adding female specific core data points to the ATHNdataset.

This is the first prospective study in Hong Kong that recruit patients with poor neurological status after intracranial aneurysm rupture in all seven public neurosurgical services in Hong Kong. This study assesses whether ultra-early aneurysm treatment improves outcomes in patients with poor neurological status after intracranial aneurysm rupture in Hong Kong. These data are essential to understand the impact of the disease and for future service development in Hong Kong.

This study aim to describe the presence, type and size of Corona mortis (CMOR) in patients undergoing total extraperitoneal (TEP) inguinal hernia repair procedures. This study also aim to describe the preperitoneal vascular anatomy of inguinal area and provide in vivo knowledge about CMOR.

This study will evaluate the performance of the Quantra System comprised of the Quantra Hemostasis Analyzer with the QStat Cartridge in trauma patients and obstetric patients with postpartum hemorrhage.

Unlike upper GI bleeding, for LGIB there is still a paucity of data on clinical presentation, patient characteristics, pathways of care and outcomes for LGIB patients. In-hospital mortality ranges from 1.2% to 8.8% (2-4), according to retrospective studies, but data from prospective series are still limited (5). Present multicentre, prospective, observational study was designed to explore these areas, to assess variations in practice management and to identify factors associated with patient outcomes.

The purpose of this study is assess the: (a) incidence of severe uterine bleeding (SUB) following exposure to individual direct oral anticoagulant (DOACs) (rivaroxaban, apixaban, dabigatran) and warfarin, (b) individual DOACs (rivaroxaban, apixaban, dabigatran) association with risk of SUB compared with warfarin, and (c) individual DOACs (rivaroxaban, apixaban, dabigatran) associated with risk of SUB compared with other individual DOACs - among women with prior diagnoses for DOAC and warfarin indications (non-valvular atrial fibrillation [NVAF], venous thromboembolism [VTE], total hip replacement [THR] or total knee replacement [TKR]).

The study´s aim is to evaluate the clinical applicability of the Feature Extraction Technology (FET) during a simulated blood loss scenario.

Although it has been pointed that estimates are significantly inexact and different from each other, the actual accuracy of them has not been properly investigated and compared.

Postpartum haemorrhage is the main cause of maternal mortality. The aim of investigators' study was to evaluate the practice of hemostatic surgery (arterial ligation, uterine compression or hysterectomy) when the embolization of uterine arteries wasn't be performed.