Clinical Research Directory

Collagen, Bone Wax or Compression for Cancellous Bone Bleeding After Single-Ray Amputation

This is a prospective, three-arm, parallel-group randomized controlled clinical trial evaluating fibrillar Type-I collagen haemostat, conventional bone wax, and standardized compression alone for control of bleeding from exposed cancellous bone following single-ray amputation. Adults undergoing single-ray amputation involving the phalanx, metacarpal or metatarsal will be randomized in a 1:1:1 ratio. The primary outcome is complete haemostasis of the exposed cancellous bone surface following the prespecified intervention and anatomical-level-specific standardized compression period, without rescue haemostatic intervention during the subsequent standardized 60-second observation period. Secondary outcomes include time to haemostasis, haemostasis grade, rescue haemostasis, blood loss, rebleeding, surgeon-rated ease of application, intervention handling time, postoperative bleeding and wound outcomes.

Consortium for Optimized Integration of Bio-Artificial Blood Components for Adaptive Resuscitation Therapy

There is need for a whole blood analog for use when banked blood is unavailable or undesirable. In civilian trauma, hemorrhage accounts for \~ 35% of pre-hospital deaths; moreover, \~ 20% of military casualties are in hemorrhagic shock on arrival to field hospitals and an additional 5% require urgent transfusion. A recent review concluded that hemorrhage accounted for \~ 90% of potentially survivable battlefield deaths - lives that could be saved with better hemorrhage control capabilities and improved, field-ready blood, blood components, or blood substitutes. While study of ideal composition for resuscitative fluids is ongoing, it is evident that for those in hemorrhagic shock, volume replenishment alone (without O2 carrying capacity) is insufficient. Alternatively, with massive blood loss or with ongoing bleeding from non-compressible injuries, resuscitation with an O2 carrier alone may be complicated by acquired coagulopathy (either dilutional or trauma-induced). Development of a balanced resuscitation fluid that treats both shock and coagulopathy (comprising a field-deployable O2 carrier with lyophilized humoral hemostatic components and platelets) is essential to allow on-scene treatment during the critical 'golden-hours' after injury. As such, the whole blood analog described herein could be this product, thus transforming care in both civilian and military settings.The scientific purpose of this study is to develop a combined whole blood substitute from individual artificial prototypes that have been separately developed for each blood component (i.e., combining an artificial oxygen carrier, with an artificial plasma analogue and an artificial platelet analogue). Together, these combined components will recapitulate the composition and performance of natural whole blood. Blending and combination experiments of the individual artificial prototypes will be performed to test compatibility and optimize efficacy. State of the art in vitro (bench top) assays will be performed to assess physicochemical and functional performance (hemodynamics, oxygen delivery, hemostasis), with data being compared to experiments performed on fresh and stored whole blood.

Using 360-Degree Interactive Video for Bleeding First Aid in Nursing Education: Effects on Knowledge, Self-Efficacy, and Learning Experience

The goal of this clinical trial is to learn if a 360-degree interactive virtual reality (VR) video simulation works to improve first aid knowledge, knowledge retention, and self-efficacy in stopping severe bleeding among first-year undergraduate nursing students. The main questions the study aims to answer are: * Does experiencing the interactive VR video simulation increase students' knowledge of bleeding first aid? * Does the VR video simulation increase students' long-term retention of first aid knowledge? * Does the VR video simulation improve students' self-efficacy in bleeding first aid? Researchers compared four groups using a Solomon four-group design to evaluate the effectiveness of the VR simulation, while also testing whether taking a pre-test affected the final outcomes. Participants: * Completed an introductory survey and possibly a baseline test measuring first aid knowledge and self-efficacy. * Attended a 1-hour standard classroom lecture about first aid for bleeding. * (Intervention groups only) Completed a 5-minute interactive 360-degree video simulation of a severe bleeding emergency using an Oculus Quest 2 VR headset, which required answering 7 clinical decision-making questions. * Completed follow-up tests 4 weeks and 8 weeks after the training to measure their bleeding first aid knowledge and self-efficacy.

Case-Specific Health Care Professional Clinical Survey for Concerto Versa™ Detachable Coils

The purpose of the Case-Specific Health Care Professional (HCP) Clinical Survey for Concerto Versa™ Detachable Coils, also known as the Concerto Versa HCP Clinical Assessment, is to collect early clinical data from HCPs to assess clinical safety and performance of the Concerto Versa™ Detachable Coils, when used in accordance with approved device labeling per the Instructions for Use (IFU). Data collected will generate clinical evidence to quantitatively assess clinical safety and device performance for the purpose of obtaining European Union Medical Device Regulation (EU MDR) approval.

HISTOACRYL® Used for Embolization of Thoracoabdominal Artery Bleeding

This observational study will collect information from adult patients in Japan who are treated with Histoacryl® to stop bleeding from arteries in the chest or abdomen, in order to better understand how well the treatment works and how safe it is during routine medical care.

CAlcium and VAsopressin Following Injury Early Resuscitation (CAVALIER) Trial

The CAlcium and VAsopressin following Injury Early Resuscitation (CAVALIER) Trial is a proposed 4 year, double-blind, mutli-center, prehospital and early in hospital phase randomized trial designed to determine the efficacy and safety of prehospital calcium and early in hospital vasopressin in patients at risk of hemorrhagic shock.

Comparing Suture vs. Combined Closure Strategies for Large Blood Vessel Access in Patients Undergoing Transcatheter Aortic Valve Implantation (TAVI)

The goal of this clinical trial is to compare two strategies for closing the main artery access site in adult patients undergoing transcatheter aortic valve implantation (TAVI) through a blood vessel in the leg (transfemoral access). The main questions it aims to answer are: Does using a single suture device lower the rate of access-related vascular complications compared to using a hybrid combination of a suture device and a plug-based closure device? How do the two closure strategies compare regarding bleeding complications, procedure time, and time to complete vessel sealing? Researchers will compare a single-suture closure strategy to a hybrid closure strategy (one suture plus one plug-based device) to see if using a single suture reduces vessel-related complications and improves patient safety after TAVI. Participants will: Undergo standard pre-procedure screening and TAVI via the main artery in the leg as part of routine medical care. Receive an initial single-suture placement before the large TAVI delivery system is inserted. Be evaluated after sheath removal for initial bleeding control; qualifying participants will then be randomly assigned (1:1) to either receive no additional device (single suture group) or receive a plug-based closure device (hybrid group). Have their heart and access site monitored during hospitalization, including laboratory checks and imaging prior to discharge. Complete a 72-hour safety and complication evaluation.

Onyx™ Liquid Embolic IDE Clinical Study

The purpose of this study is to evaluate the safety and effectiveness of Onyx™ LES in the treatment of subjects with active arterial bleeding in the peripheral vasculature outside of the heart and brain.

Topical and Local TXA in Facelifts - A Randomized Controlled Double Blinded Study

Tranexamic acid (TXA) is a fibrinolytic inhibitor which prevents prolonged bleeding by interfering with fibrin clot breakdown by competitively binding to lysine receptors on plasminogen; this prevents the conversion of plasminogen to plasmin. TXA will be applied to a randomly assigned side of the face during facelift surgery. The intervention groups will include 1% TXA mixed with standard local consisting 1/4% lidocaine with 1:100,000 epinephrine, 3% TXA on TXA-soaked pledgets applied for 10 minutes, and 1% TXA with local plus 3% TXA-soaked pledgets. Each treatment arm will be compared to saline in place of TXA on the contralateral side of the face. Although TXA has been widely used in surgical fields for decades and is officially recommended by agencies such as ACOG for use during maternal hemorrhage, its current FDA approval only pertains to oral TXA for heavy menstrual bleeding and IV use for patients with hemophilia to prevent or reduce hemorrhage (cite). The main concern with intravenous TXA is the increased risk for the potential formation of blood clots, mainly in patients with clotting disorders, such as Facor V Leiden, and patients on estrogen containing medication. A recent systemic review with metanalysis by Wang et.al contained a total of 2150 patients receiving IV TXA while undergoing plastic surgery concluded that use of IV TXA does not lead to increased adverse events.\[12\] Given the low rate of adverse events while using TXA systemically, this protocol's application of TXA topically and/or locally negates the risk for any potential systemic adverse effects. No systemic adverse effects have been reported in studies examining local TXA in facial plastic surgery to date.

Okami Medical ALPHA Registry

This registry will provide insights into the use of Okami Medical devices in real-world clinical and study effectiveness and safety of Okami Medical devices.

Effectiveness of the Pressure Recording Analytical Method in Predicting Fluid Responsiveness in Pediatric Critical Care Patients

The Pressure Recording Analytical Method, invasive hemodynamic monitoring, is an uncalibrated pulse contour analysis, installed in the Mostcare® system that allows a continuous estimation of the stroke volume and thus the cardiac output, by the relationship between the area under the curve of the systolic portion of the arterial blood pressure curve and the dynamic impedance of the cardiovascular system. The objectives of the study are to determine if the parameters measured by Mostcare® make it possible to predict the response to volume expansion in pediatric surgical critical care patients, sedated, intubated and ventilated, by comparing the changes in stroke volume, induced by a volume expansion, measured by trans-thoracic echocardiography.

A Study to Compare the Efficacy and Safety of TachoSil and Surgicel Original as an Adjunct to Control Mild to Moderate Soft Tissue Bleeding During Surgery

The purpose of this clinical study is to assess the efficacy and safety of TachoSil compared to the widely known and used for \> 60 years local hemostatic product Surgicel Original as an adjunct to control mild to moderate soft tissue bleeding during surgery.

Tranexamic Acid for the Prevention of Obstetrical Hemorrhage After Cesarean

A randomized placebo-controlled trial of 11,000 women to assess whether tranexamic acid as prophylaxis lowers the risk of postpartum hemorrhage in women undergoing a cesarean delivery.

Efficacy and Safety of Antihypertensive Treatment With Mobile Stroke Units in Ultra-Early Intracerebral Hemorrhage

MSU-ICH is a prospective, multicenter, Week-wise-randomized, open-label, blinded-endpoint (PROBE) clinical trial comparing ultra-early prehospital blood pressure lowering delivered by a Mobile Stroke Unit (MSU) with standard Emergency Medical Services (EMS) in patients with spontaneous intracerebral hemorrhage.

Cryo-FIRST: Effectiveness of INTERCEPT Fibrinogen Complex (IFC) for Trauma-Associated Hemorrhage

The objective of this multicenter, single-arm, observational study is to determine the feasibility and effectiveness of early administration of FDA-approved, pre-thawed Pathogen Reduced Cryoprecipitated Fibrinogen Complex (INTERCEPT Fibrinogen Complex, IFC) in trauma patients with hemorrhagic shock (HS) and functional hypofibrinogenemia. This study will determine whether rapid point-of-care testing for functional hypofibrinogenemia and availability of a shelf-stable fibrinogen complex (IFC) results in shorter time to administration of fibrinogen replacement and correction of functional hypofibrinogenemia, as compared with historical controls and published literature using conventional cryoprecipitate-AHF (CRYO-AHF). This study aims to: * Demonstrate the feasibility and response to early administration of pre-thawed IFC when ordered during initial resuscitation of severely injured patients with HS and functional hypofibrinogenemia. * Assess the effectiveness of early administration of pre-thawed IFC on correction of functional hypofibrinogenemia and on proximate process measures of resuscitation, including time to hemostasis, time to completion of resuscitation, and total volume of resuscitation. * Assess clinical outcomes in severely injured patients with HS and functional hypofibrinogenemia receiving early administration of pre-thawed IFC.

Tranexamic Acid for Second Trimester Dilation and Evacuation and Bleeding Outcomes

Although procedural abortion in the second trimester is extremely safe, hemorrhage is one of the leading causes of morbidity and mortality. Tranexamic acid (TXA) is used commonly in obstetrics to prevent or manage intrapartum or postpartum hemorrhage and has been associated with decreased mortality and decreased blood loss at the time of birth. Some guidelines are recommending the use of TXA for both the prevention and management of bleeding for abortion care. However, there are currently no published studies assessing the association between TXA and bleeding outcomes for abortion procedures. This study will involve a randomized, placebo-controlled trial of pregnant patients aged 18 and older desiring dilation and evacuation (D\&E) for abortion or fetal demise at 18-24 weeks gestation. The primary aim is to determine whether prophylactic TXA has an effect on the need for additional interventions to control bleeding at the time of D\&E. The secondary aim is to determine whether prophylactic TXA has an effect on the mean quantitative procedural blood loss.

REpeated ASSEssment of SurvivorS in Intracerebral Hemorrhage Study

The investigators propose to perform serial detailed cognitive, motor, behavioral, and blood collection follow-up using longitudinal structured telephone interviews of an anticipated 350 ICH survivors enrolled in Minimally Invasive Surgery Plus Alteplase for Intracerebral Hemorrhage Evacuation (MISTIE) III and ENRICH trials to identify specific cognitive and motor impairment and to perform RNA sequencing to evaluate for evidence of chronic inflammation. The investigators' expected sample size in 2022 accounts for mortality attrition of 10%/year.

Catheter Ablation Plus LAAO Versus Anticoagulation in Frail Elderly Patients With Atrial Fibrillation

Atrial fibrillation (AF) is the most common arrhythmia, significantly increasing the risk of stroke, heart failure, hospitalization and death in patients. Studies have shown that standardized anticoagulation can effectively reduce the risk of stroke by 64% and the risk of death by 26% in AF patients. Therefore, both European and American guidelines recommend standardized oral anticoagulation (OAC) as an important treatment strategy for stroke prevention in AF patients. However, the use of OAC may also increase the risk of bleeding in patients. Results from large AF anticoagulation randomized trials show that the annual risk of anticoagulation-related bleeding mortality is 2% to 3%. Therefore, according to the guidelines recommendations, assessing the bleeding risk is necessary in patients with anticoagulant indications. Percutaneous left atrial appendage occlusion (LAAO) is a device-based therapy that aims to prevent ischemic stroke in patients with AF. For patients with contraindications to long-term anticoagulation therapy, LAAO can be considered as an alternative strategy to oral anticoagulation (Class II B recommendation) to prevent ischemic stroke and thromboembolism. Multiple studies have shown that LAAO is non-inferior to warfarin and novel oral anticoagulants in stroke prevention for non-valvular AF patients. Age is not only a risk factor for stroke but also an important risk factor for bleeding. In the elderly population, especially those with frailty, the risk factors for both stroke and bleeding are often increased. Currently, there is insufficient evidence to support the use of OAC in frail elderly patients with relative anticoagulant contraindications. Therefore, elderly AF patients may be one of the potential beneficiary groups for LAAO. However, most previous clinical studies on LAAO were based on small sample sizes to analyze their safety and efficacy, and clinical data on the safety and efficacy of LAAO in this high-risk population of elderly AF patients are still limited. To address this, the study aims to conduct a multicenter randomized controlled trial to compare the efficacy and safety of catheter ablation combined with LAAO versus catheter ablation combined with OAC in elderly AF patients with high bleeding risk, filling the gap in this research area. To address these limitations, this multicenter randomized controlled trial is designed to evaluate the efficacy and safety of catheter ablation combined with LAAO versus catheter ablation combined with OAC in elderly AF patients at high risk for bleeding. The primary objective of the study is to compare the 12-month incidence and time-to-occurrence of the composite clinical endpoint. This endpoint includes stroke/TIA, systemic embolism, ISTH-defined major bleeding. By establishing these metrics within the first year, the study aims to fill the current void in clinical evidence and provide a standardized treatment strategy for high-risk elderly patients. In addition to the primary endpoints, the study will conduct a comprehensive long-term evaluation extending to 24 months post-procedure to assess the durability of both treatment strategies. Secondary objectives include the assessment of perioperative safety, specifically focusing on serious intraoperative complications and major adverse events occurring within the first seven days after the LAAO procedure. The trial will also measure long-term rhythm control by tracking the rate of freedom from AF recurrence at the one-year and two-year marks. Furthermore, the study seeks to verify the hypothesized superiority of the ablation-plus-LAAO strategy in reducing the specific burden of anticoagulation-related major bleeding and stroke. Beyond clinical safety and efficacy, the trial will analyze the practical aspects of the two interventions, including procedural success rates, operation duration, fluoroscopy time, and the total duration of hospitalization. A critical component of the research involves identifying specific risk factors associated with complications, with a specialized focus on how frailty scores influence procedural tolerance and long-term prognosis. The study will further explore how different types of AF respond to the LAAO strategy and assess the impact of each treatment on non-major bleeding events. Ultimately, the trial aims to determine which strategy offers a superior improvement in the overall quality of life for elderly patients, thereby optimizing future clinical guidelines.

CLOT-LESS - CLOsure Tailored: LEss Antithrombotic Strategy After LAAC for Stroke Prevention

This is a prospective, non-randomized, observational cohort study conducted at the FSBI "NMRC TPM" of the Ministry of Healthcare of the Russian Federation. Left atrial appendage closure (LAAC) has been shown to be non-inferior to oral anticoagulation for preventing cardioembolic events in patients with atrial fibrillation. However, the optimal post-procedural antithrombotic regimen following LAAC remains unclear, with no consensus on evidence-based therapy. Given current trends in cardiology favoring reduced-intensity antithrombotic strategies, this study aims to contribute to the evidence base by evaluating whether LAAC followed by reduced-dose apixaban (2.5 mg BID) for 3 months with subsequent complete withdrawal of antithrombotic therapy is superior to long-term standard-dose DOAC therapy in patients with non-valvular atrial fibrillation.

Evaluation of the Impact of an Expert Opinion During the Management of Patients With Severe Bleeding on Oral Anticoagulants.

The goal of this randomized clinical trial is to evaluate the impact of an expert opinion during the management of patients with severe bleeding on oral anticoagulants. The main question it aims to answer is : • Does an expert help of decision during the management of patients with severe bleeding is superior to classic management ? The centers will be randomized in one of the two groups : control group and interventional group. Patients will be followed for 3 months. At their inclusion they will be managed in conformity of the randomisation of their center. They will be followed at hour 0 + 6 , H0+24 and at the end of hospitalization. After 3 months, they will be called to assess the occurrence of thrombotic events ou hemorrhage complications. Researchers will compare the classic management versus the management with an expert opinion to see if the expert opinion is superior to classic management.

SWIFT - SWIss Factor XIII Trial in PPH

The goal of this trial is to determine if postpartum blood loss can be reduced by replenishing coagulation factor XIII (FXIII) at an early stage of postpartum hemorrhage (PPH). Summary of current body of evidence: * Morbidity and mortality due to PPH is rising. * Current guidelines focus on replenishment of fibrinogen as an initial step in the treatment of PPH-related coagulopathy, despite non-conclusive evidence in all prospective trials. * Trials from other specialties demonstrate a significant impact of FXIII on perioperative bleeding complications; a previous study at the University Hospital Zurich showed that pre-partum factor XIII activity had a strong association to postpartum blood loss. Therefore, this nationwide, multi-center, randomized, controlled trial in multiple perinatal centers across Switzerland will be conducted. The goal is to determine if postpartum blood loss and PPH-related complications can be reduced by replenishing FXIII. All participating women receive, according to the national guideline, 1g tranexamic acid (TXA) i.v. in case of PPH (measured blood loss \[MBL\] ≥ 500 mL) during the pre-study phase. Randomization takes place if bleeding continues and exceeds 700mL. The intervention group then receives FXIII (Fibrogammin®) according to approved dosage in addition to obstetric standard of care treatment for causes of PPH; the control group receives only standard of care treatment.

U-CaVIT Versus Standard of Care for Prevention of Atonic Postpartum Hemorrhage After Cesarean Section in High-risk Women.

This pilot study aims to assess performance, safety and feasibility of U-CaVIT method (Uro-Catheter Vacuum Induced Tamponade), using the Rüsch® Brillant Silicone Balloon Catheter, an urological catheter, for the prevention of atonic PPH in high-risk women undergoing cesarean delivery. The U-CaVIT method has been implemented at the Department of Obstetrics at university hospital of Zurich (USZ) due to temporary supply issues with the Bakri® Balloon Catheter. The Rüsch® Balloon Catheter is used in case of uterine atony when standard first-line uterotonic treatments have failed or in some cases as add-on therapy in non-atonic PPH. In the meantime, the use of U-CaVIT has become standard practice at the USZ for the treatment of atonic PPH, appearing to be user-friendly, clinically effective according to treating physicians, well tolerated by the treated women and cost-saving compared to the previously used Bakri® Balloon.

Biological and Clinical Relevance of Quantra Viscoelastic Hemostatic Assay in Hemorrhagic Cardiac Surgery

The goal of this observational study is to assess the correlation between Quantra viscoelastometric assay and laboratory hemostasis biology in a cardiac surgery cohort presenting with acute hemorrhage in the operating room. The main questions it aims to answer are: * is Quantra a valuable surrogate for hemostasis biology in the setting of bleeding cardiac surgery? * are Quantra parameters well correlated with tranfusion thresholds in the setting of bleeding cardiac surgery?

Retrospective Study on Characteristics and Outcomes in Hospitalised Patients Treated With Ondexxya

This is an observational retrospective database study of hospitalized patients treated with andexanet alfa in approximately 10 Dutch hospitals. Currently there is limited information on the patient characteristics and outcomes of patients who are treated with andexanet alfa in The Netherlands and how it is used. This is of interest for treating clinicians because there is a need for a patient profile, also due to the on par position of andexanet alfa with PCC in the Dutch national guideline. Analysis of the data showed that 14 patients of the 218 patients included in the study (6.4%) experienced a thrombotic event (TE) within 30 days after treatment with andexanet alfa. The protocol was amended to allow for an in depth analysis of the 14 TE cases.