Clinical trials

150

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Condition / disease
Location
Status: Recruiting

DECONGEST-AHF: Vasodilatation or Loop Diuretics in Acute Heart Failure

Background: Intravenous (IV) loop-diuretics have been a key component in treating pulmonary edema since the nineteen sixties and has a Class 1 recommendation in the 2021 European Society of Cardiology guidelines for heart failure. Conversely, vasodilation was downgraded in the treatment of acute heart failure due to a lack of trials that compare vasodilation with loop-diuretics in a hyperacute clinical setting. This clinical equipoise will be tested in a trial including patients with pulmonary congestion immediately at hospital admission. Primary objective: To determine the superior strategy of loop-diuretics (furosemide), vasodilation (nitrates) or the combination during emergency treatment. Design: Investigator-initiated, randomized, double-blinded, placebo-controlled trial with 1:1:1 allocation. Intervention: Intervention-phase will last 6 hours from study-inclusion, and patients will be allocated to one of three groups: * Boluses of 40 mg IV furosemide + nitrate-placebo as soon as possible and repeated up to 10 times. * Boluses of 3 mg IV isosorbide dinitrate + furosemide-placebo as soon as possible. * Boluses of both 3 mg IV isosorbide dinitrate + of 40 mg as soon as possible.

Participants needed: 1,041
Trial details
Phase: Phase 4Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 17, 2026Locations: 5
Eligibility criteria

Age ≥ 18 years [+5]

More than 50 mg IV furosemide within the last three hours before randomization i... [+3]

Status: Recruiting

Back to Life - Early Rehabilitation Therapy for Patients Undergoing Lumbar Spinal Fusion

Aim This study aims to assess the effectiveness of an early intervention comprising individually tailored physiotherapy, including dialogue, education, and graded activity, following lumbar spinal fusion surgery. The effectiveness will be evaluated on patient-specific goals, physical activity, pain intensity, pain interference, fear of movement, and pain self-efficacy for patients after a lumbar spinal fusion.

Participants needed: 12
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 14, 2026Locations: 1
Eligibility criteria

≥ 18 years of age [+3]

Post-traumatic vertebral compression/deformity [+3]

Status: Recruiting

Automated Insulin Delivery Versus Usual Insulin Treatment Modality Before and During Pregnancy in Women With Type 1 Diabetes

A national multi-center open-label randomized controlled trial that investigates whether the use of the automated insulin delivery system CamAPS FX initiated during pregnancy planning or in early pregnancy improves maternal time in glycemic targets and fetal growth in women with type 1 diabetes compared to usual insulin treatment modality combined with Continuous Glucose Monitoring.

Participants needed: 305
Trial details
Age: 18-45Biological sex: FemaleType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 8
Eligibility criteria

Women, age 18-45 years [+7]

No proficiency in Danish to understand oral and written information [+1]

Status: Recruiting

Introduction of Mycotic Prophylaxis At Cystectomy Trial.

This study aims to introduce a perioperative antifungal prophylaxis for patients undergoing cystectomy: surgically removal of the urinary bladder with construction of a urinary diversion. We wish to investigate the effect of antifungal prophylaxis on complications after the operation.

Participants needed: 420
Trial details
Phase: Phase 4Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 1
Eligibility criteria

Patients 18 years and older [+3]

Patients with contraindications to Fluconazole. This includes allergies and trea... [+1]

Status: Recruiting

PET/CT Follow up for Head and Neck Squamous Cell Carcinoma

PET/CT follow up for Head and Neck Squamous Cell Carcinoma The following is a presentation of a prospective protocol, named PET/CT follow up for Head and Neck Squamous Cell Carcinoma (PET Follow), including patients who have completed radiotherapy treatment for squamous cell carcinoma of the head and neck (HNSCC). The purpose of this study is to investigate the diagnostic performance of 18F-fluorodeoxy-D-glucose (FDG) Positron Emission Tomography/ Computed Tomography (PET/CT) in patients with HNSCC after curative intended treatment.

Participants needed: 600
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 1
Eligibility criteria

Informed consent [+2]

Patient refusal [+3]

Status: Recruiting

Copenhagen Master Observational Trial

The primary objectives of this prospective non-interventional study (NIS) are to assess and describe outcomes in relation to biomarkers, including whole-genome sequencing (WGS) in patients with non- small cell lung cancer (NSCLC) or breast cancer receiving treatment offered in the clinic (standard of care or included in clinical trials).

Participants needed: 2,400
Trial details
Age: 18+Biological sex: AllType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 1
Eligibility criteria

Patients (≥ 18 years of age) with diagnosis of NSCLC or breast cancer amenable t... [+3]

Patient with breast cancer initiating adjuvant systemic therapy [+1]

Status: Recruiting

The PREVENT AGITATION Trial II - Children ≤1 Year

Emergence agitation is a clinical condition in which the child experiences a variety of behavioural disturbances including crying, thrashing, and disorientation during early awakening from anaesthesia. Emergence agitation is a common challenge in children with a reported incidence of approximately 25% ranging from 10 to 80 %. Clonidine is often used off-label in paediatric anaesthesia e.g. sedation in the intensive care unit, prevention of withdrawal symptoms after long-term sedation, as premedication before induction of anaesthesia or as treatment/prevention of emergence agitation. The study is designed as a randomised, placebo-controlled clinical trial evaluating efficacy and safety of a single dose of intraoperative clonidine in children 3-12 months, including pharmacokinetics.

Participants needed: 336
Trial details
Phase: Phase 2, Phase 3Age: 3-12Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 2
Eligibility criteria

Paediatric patients (male and female), aged 3- ≤ 12 months [+2]

ASA >2 [+15]

Status: Recruiting

Cerebellar Mutism Syndrome Study

The purpose of this study is to determine why up to 25% of the pediatric patients who have surgery for a tumor in the posterior fossa develops the Cerebellar Mutism Syndrome (CMS). Furthermore the purpose is to explore the clinical course and the best treatment of the syndrome.

Participants needed: 2,000
Trial details
Age: Up to 18Biological sex: AllType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: Aug 12, 2026Locations: 32Duration: 1 Year
Eligibility criteria

Age < 18 years at the date of first imaging showing this tumour [+2]

None

Status: Recruiting

Conduction System Pacing vs. Biventricular Pacing for Cardiac Resynchronization Therapy

The NORDIC-CSP trial is an investigator-initiated, blinded, nordic RCT aimed at evaluating whether using direct pacing of the HIS bundle (HIS)-pacing or left bundle branch (LBB) pacing is superior to conventional biventricular pacing in reducing the incidence of the composite endpoint of death and non-planned HF hospitalization. The study will be conducted in the 4 CRT-centres in Denmark and 6-8 centres from countries Sweden, Norway and Finland.

Participants needed: 1,100
Trial details
Age: 18-99Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 28, 2026Locations: 5
Eligibility criteria

≥18 years of age, [+7]

recent acute myocardial infarction (AMI) [+4]

Status: Recruiting

Unilateral vs. Bilateral Lung Volume Reduction Surgery

This study compares two surgical approaches for patients with severe Chronic Obstructive Pulmonary Disease (COPD) and severe emphysema: unilateral (operating on one lung) versus bilateral (operating on both lungs) lung volume reduction surgery (LVRS).

Participants needed: 146
Trial details
Age: 18-75Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 28, 2026Locations: 1
Eligibility criteria

Suitable target areas in both lungs [+3]

Dependent on wheelchair [+9]

Status: Recruiting

Preventive Interventions for Chronic Pain Worsening

This is an open label randomized controlled trial (RCT), which will be conducted with patients of the Copenhagen Wound Healing Center at Bispebjerg Hospital in Copenhagen (DK). The trial has two arms (1:1): A Virtual Reality based Pain Self-management (VRPS) program group, and a control group (usual care). Included will be 44 patients at least 18 years old; fluent in the Danish language; complaint of pain lasting 3 months or more; in average pain intensity score ≥ 3 (numerical rating scale 0 to 10); access to internet; and willing and available to participate in the study. Excluded will be specialized or multidisciplinary pain treatment at baseline; history of epilepsy, seizure disorder, nausea or dizziness, hypersensitivity to flashing light or motion or other diseases that may prevent use of virtual reality equipment; injury to eyes, face or neck.

Participants needed: 44
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 9, 2026Locations: 1
Eligibility criteria

At least 18 years old [+4]

Specialized or multidisciplinary pain treatment at baseline [+10]

Status: Recruiting

Feasibility of Wireless Continuous Vital Sign Monitoring and Impact on Patients Undergoing Adult Spinal Surgery in a General Ward

The goal of this feasibility study is to explore the use of wireless continuous vital sign monitoring in an orthopaedic setting among orthopaedic nurses and patients undergoing adult spinal deformity surgery. In addition to the standard care National Early Warning Score the participants in this study will be monitored by CPC12S a wearable sensor that is worn on the chest using electrodes measuring electrocardiography single lead (ECG), Heart rate, respiratory rate, SpO2, blood pressure and temperature. Main hypotheses: The use of wireless continuous vital sign monitoring in daily clinical practice for patients undergoing ASD surgery is feasible in terms of increased acceptability among orthopeadic surgical nurses measured over 12 months with a response rate of at least 80% with an average score of ≥5 at the last measurement in each of the four dimensions of the USE questionnaire: Usefulness, ease of use, ease of learning and satisfaction. The following parameters will be evaluated: Primary outcome: 1. The feasibility in terms of acceptability of the concept of wCVSM among orthopedic surgical ward nurses. Secondary outcomes: 2. The feasibility in terms of acceptability of the concept of wCVSM in patients undergoing ASD surgery. 3. The technical fidelity of wCVSM, assessed by data collected of vital signs, display of alerts to staff nurses and response to the alerts. 4. The frequency of vital sign deviations in patients after ASD surgery using wCVSM compared to NEWS2. 5. Clinical outcomes of patients undergoing ASD surgery including surgical complications, reinterventions, ICU admissions, unplanned ward transfer, and admissions to another department.

Participants needed: 150
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 9, 2026Locations: 1
Eligibility criteria

Included are adult patients (>=18 years) scheduled for ASD surgery with estimate... [+1]

Exclusion criteria are patients who are unable to wear continuous monitoring due... [+1]

Status: Recruiting

Reversible Effects of Oral Contraceptive Removal on Serotonergic Neurotransmission

The goal of this study is to learn about potential reversible effects of combined oral contraceptive (COC) use on the serotonergic brain system. The main question it aims to answer is: \- If COC discontinuation results in an increase in serotonin 4 receptor binding in caudate, putamen, and hippocampus measured with Positron Emission Tomography from baseline to follow-up ≥ week 8 after discontinuation. The secondary question it aims to answer is: \- Over what timeframe the serotonin 4 receptor binding is restored after COC discontinuation to the level previously seen in a group of premenopausal women who had not used hormonal contraception before. Researchers will compare discontinuation with continuation of a 2nd generation COC containing 150 ug levonorgestrel and 30 microgram to see if COC discontinuation results in an increased serotonin 4 receptor level in the brain. \- Participants will: * Be randomized to discontinue or continue their COC use for 1-52 weeks. * Undergo an investigational program including brain scans, biological sampling, and neuropsychological testing at baseline and at follow-up. The study uses a group sequential design with two sequential analyses planned, including an interim analysis after 60% of the brain scans have been acquired, which will be used to decide the timing of the last 40% of the scans - this is performed to best determine when the recovery of the serotonin 4 receptor level occurs.

Participants needed: 60
Trial details
Phase: Phase 4Age: 18-39Biological sex: FemaleType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 2, 2026Locations: 1
Eligibility criteria

Healthy women (assigned female at birth) at 18-39 years of age [+1]

Current or previous neurological or psychiatric disease, severe somatic disease,... [+14]

Status: Recruiting

Does AI Make Clinicians More Appropriately Confident? A Randomized Study in Preterm Birth Prediction

The goal of this randomized questionnaire-based study is to evaluate how different presentations of artificial intelligence (AI) decision support influence clinical judgment among medical doctors working in obstetrics and gynecology when assessing the risk of spontaneous preterm birth using clinical case vignettes with cervical ultrasound images. The study specifically compares two AI presentation formats: a binary classification (preterm vs term birth) and an individualized risk estimate of preterm birth. The main questions it aims to answer are: * Which AI presentation format leads to better alignment between clinicians' confidence and decision accuracy (diagnostic calibration)? * Do different AI presentation formats lead to helpful or harmful changes in clinical decisions? Participants will complete an online questionnaire in which they review clinical cases, make diagnostic and management decisions, rate their diagnostic confidence before and after seeing the AI output, and report their trust in the AI.

Participants needed: 125
Trial details
Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jul 1, 2026Locations: 18
Eligibility criteria

Medical doctors currently working in or training within the field of obstetrics... [+1]

Status: Recruiting

Protein Biomarkers and Host RNA Expression Profiles in Congenital Cytomegalovirus Infection

This study seeks to identify and test host protein biomarkers and RNA expression profiles in dried blood spot samples as novel diagnostic markers of congenital cytomegalovirus sequelae and to improve the understanding of the pathogenesis of the disease.

Participants needed: 630
Trial details
Age: 0-28Biological sex: AllType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: Jun 9, 2026Locations: 2
Eligibility criteria

Children born between 1 January 2010 and 31 December 2025 with an available neon... [+2]

DBS samples not approved for research use. [+2]

Status: Recruiting

Scar Remodeling After Burn Injury Using Allogeneic Adipose-derived Stromal Cells

The present project serves to test whether stem cell therapy offers a new treatment option for the scars of burn survivors. In Denmark, 12.000 people seek medical assistance every year for burn injuries leaving thousands of people with the devastating condition of hypertrophic scarring. Affected patients experience pain, itching, numbness, and reduced range of motion, which profoundly impact their quality of life. We hypothesize that adipose-derived stem cells can improve scar quality. To test this, we have conducted an integrated phase I + II trial (the ScarASC trials). ScarASC will be the first randomized controlled trial to use stem cells in burn patients. Two scar areas in each patient will be randomly injected with A) allogeneic adipose-derived stem cells and B) the control medium (placebo). We maintain a patient-centered scope, with our primary endpoint being a patient-reported outcome measure. However, we also obtain objective scar assessments using three-dimensional photographs, the scar elevation index, and gene/protein expression regulation.

Participants needed: 39
Trial details
Phase: Phase 1, Phase 2Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jun 9, 2026Locations: 1
Eligibility criteria

Adults ≥ 18 years of age [+4]

Significant comorbidities or lack of cognitive abilities to follow instructions. [+7]

Status: Not yet recruiting

The HYCORE1 Trial: Hybrid Revascularization Versus Coronary Artery Bypass Grafting

Coronary artery disease often necessitates complex interventions like coronary artery bypass surgery (CABG) or percutaneous coronary intervention (PCI) with stents. Hybrid coronary revascularization, a minimally invasive approach, integrates both methods for complete revascularization. This multicenter randomized trial involves 1200 patients, comparing hybrid coronary revascularization to CABG in a 1:1 ratio. Eligible participants have multi-vessel coronary disease and are referred for elective or sub-acute CABG. Inclusion criteria include age 18 or older, significant multi-vessel disease, and potential complete revascularization with both methods. Exclusion criteria include chronic kidney disease, pregnancy, contradiction to dual antiplatelet therapy, recent myocardial infarction, and acute revascularization. The hybrid group undergoes staged revascularization, combining minimally invasive grafting of the left interior mammary artery to the left anterior descending artery with PCI-stenting of remaining lesions. The control group undergoes conventional CABG with sternotomy. The primary outcome is a composite of all-cause mortality, myocardial infarction, stroke, or unplanned hospitalization, while secondary outcomes include periprocedural complications, cardiovascular mortality, hospital-free days within 90 days, angina frequency, and quality of life. Evaluation occurs 12 months after randomization. The trial commences in 2024, with inclusion expected to conclude in 5 years.

Participants needed: 1,048
Trial details
Age: 18-80Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: Jun 3, 2026Locations: 3
Eligibility criteria

Written informed consent [+3]

Chronic kidney disease with estimated glomerular filtration rate < 20 mL/min/kg [+5]

Status: Recruiting

Anemia Therapy in Patients With Infective Endocarditis

Infective endocarditis (IE) is a bacterial infection of the heart valves, inserted material or surrounding struc-tures and is associated with a high morbidity and mortality. In patients with IE, anemia is considered to result from the underlying infection, prolonged sustained inflammatory response due to the often slow natural course of the disease, and coexisting comorbidities. Previous studies have found that moderate to severe anemia is associated with a markedly higher risk of mortality in the 6-months recovery phase following treatment for IE. In many cardiac patients and patients with chronic inflammation, randomized trials have shown benefit of treatment of anemia with adjunctive therapy i.e., vitamins (vitamin B12/folic acid), intravenous iron, and erythropoiesis stimulating agents in alleviating anemia, without increased risk of infection. Despite these findings, anemia screening and management are not addressed in current endocarditis guidelines. Thus, in patients with IE and anemia, adjunctive treatment of the anemia might be beneficial for recovery and improve outcomes. The aim of POET-IRON is to assess the efficacy of adjunctive anemia treatment in patients with IE, using intravenous iron supplementation, erythropoietin-stimulated erythropoiesis, and dietary optimization including vitamins if necessary, and its effect on hemoglobin levels compared to standard care. The investigators hypothesize that this intervention is safe and will increase hemoglobin concentration, thereby alleviating symptoms of anemia and improving clinical outcomes through enhanced oxygen-carrying capacity, tissue oxygenation, and functional status.

Participants needed: 74
Trial details
Phase: Phase 4Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: May 29, 2026Locations: 1
Eligibility criteria

18 years or older [+8]

Known or suspected immunocompromise (e.g., HIV infection, ongoing chemotherapy,... [+7]

Status: Recruiting

The Impact of Image Acquisition in Cervical Ultrasound on AI-Based Prediction of Preterm Birth in Clinical Practice

This study prospectively evaluates whether the performance of an already-developed artificial intelligence (AI) model for predicting spontaneous preterm birth changes when cervical ultrasound images are obtained using different ultrasound image settings. The primary research question is whether the AI model performs differently across images acquired with different imaging settings.

Participants needed: 2,000
Trial details
Age: 18+Biological sex: FemaleType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: May 20, 2026Locations: 1
Eligibility criteria

Pregnant women aged ≥18 years [+1]

Absence of transvaginal cervical assessment at the second-trimester scan [+2]

Status: Not yet recruiting

PIRe 2.0: A Stepped-Care Model for Involving Relatives Across Sectors

Serious brain diseases and injuries affect not only the person who becomes ill or injured, but also their family. Relatives of people with acquired brain injury (ABI) or malignant brain tumor (MBT) often take on a major role in daily care, decision-making, and coordination across healthcare services. This role can include managing information, supporting rehabilitation, and acting as a link between hospital care and community rehabilitation. Many relatives report high levels of stress, uncertainty, and emotional burden, especially during transitions between care settings. Despite recommendations for greater involvement of relatives, support for this group is often uneven and poorly coordinated across healthcare sectors. Relatives frequently experience lack of overview, limited guidance, and unclear expectations regarding their role. These challenges may increase caregiver burden and negatively affect both relatives' well-being and the continuity of care. The PIRe 2.0 study aims to further test, and implement a structured intervention to support systematic involvement of relatives of people with ABI or MBT across hospital and community rehabilitation services. The intervention is designed as a "caregiver compass" that helps relatives understand their role, clarify their needs and wishes for involvement, and gain better overview of the care pathway. PIRe 2.0 is delivered through a stepped-care model, which allows the level of support to be adjusted over time based on each relative's level of burden and support needs. All relatives receive basic information and screening for caregiver burden using the 4-item Zarit Burden Interview (ZBI-4). Relatives who show signs of increased burden are offered additional support in steps, ranging from structured conversations with nurses to extended cross-sector coordination and specialized support for relatives with high or complex needs. Decisions about stepping up or down are based on both screening results and clinical assessment to ensure flexibility and person-centered care. The study includes two groups of relatives: an intervention group receiving support through the PIRe stepped-care model, and a control group receiving usual care only. A total of 160 relatives will participate. Data are collected at baseline, at transitions between hospital and community care, and three to six months after the intervention. The primary outcome is change in caregiver burden, measured with the Caregiver Burden Scale (CBS). Secondary outcomes include relatives' roles and responsibilities, perceived support and involvement in care, and mental well-being, assessed using validated patient-reported outcome measures. In addition to evaluating the effect of the intervention, the study examines how the PIRe model can be implemented and sustained in everyday practice across healthcare sectors. The results are expected to show whether a structured, stepped-care approach can reduce caregiver burden, improve coordination between hospital and community services, and support more coherent and secure care pathways for people with ABI or malignant brain tumor and their relatives.

Participants needed: 160
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: May 19, 2026Locations: 1
Eligibility criteria

Primary relative of an adult diagnosed with acquired brain injury (ABI) or malig... [+3]

Insufficient proficiency in Danish to complete questionnaires and participate in... [+1]

Status: Recruiting

Early Detection of Complications During Immunotherapy for Haematological Malignancy

Aims * To identify patients that should remain admitted in hospital for more intense surveillance because of high risk for development of clinical complications * Expand the understanding of the interactions between physiology and immunology for the design of future projects and general knowledge Hypothesis Development of a risk model based on a combination of physiological and immunological parameters can contribute to early detection of patients at risk for clinical complications after anti-cancer treatment.

Participants needed: 100
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: May 15, 2026Locations: 1
Eligibility criteria

Age ≥ 18 years [+2]

Patient is pregnant [+3]

Status: Recruiting

Randomized Controlled Trial of the Effects of Combined Resistance and AerobiC Exercise on Health-related Quality of Life in Patients Undergoing First-line Chemotherapy for Metastatic Colorectal Cancer (REACH)

The primary objective of this trial is to compare the effects of 18 weeks structured exercise training versus on control on healt-related quality of life in patients with mCRC undergoing first-line chemotherapy.

Participants needed: 150
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: May 13, 2026Locations: 4
Eligibility criteria

Pregnancy. [+5]

Status: Recruiting

Transoral Ultrasound Versus no Transoral Ultrasound in Diagnostic Workup of Peritonsillar Abscess

Peritonsillar abscess (PTA) is a collection of pus between the palatine tonsil and the constrictor muscle. PTA is detected by recognizing characteristics during clinical examination: redness, pain, malaise, trismus, and unilateral peritonsillar swelling. Clinical assessment, including inspection and palpation, is the traditional diagnostic method for patients suspected of having PTA. If PTA is suspected, aspiration with a large-gauge needle or incision is performed to drain the abscess . It can be challenging to distinguish PTA and peritonsillar cellulitis (PTC) based on clinical examination alone. Due to the increased availability of point-of-care ultrasound, it is a part of the diagnostic workup of PTA. Several studies have shown that transoral US can improve the diagnostic accuracy of patients with a suspected PTA. However, no large multicenter study has evaluated whether one of these methods is superior to the other. It is therefore very clinician-dependent whether the patient will have a transoral US performed or not. The investigators hypothesize that transoral US will increase the diagnostic accuracy of PTA compared to solely clinical examination, which is a visual and palpatory assessment. This will result in fewer unnecessary aspiration attempts and overlooked PTAs. Additionally, the investigators wish to investigate the number of aspirations of transoral US-guided needle aspirations compared to aspirations without ultrasound. Methods This is a cluster randomized study. Patients with suspected PTA will be randomized 1:1 to groups A and B. The cluster randomization will happen weekly using an online randomization tool. Participants are patients refeered to the outpatient clinic on suspicion of a peritonsillar absces. The primary outcome is the diagnostic accuracy The investigators aim to determine whether transoral US is a standard part of the clinical examination by comparing clinical examinations with and without US.

Participants needed: 368
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: Rigshospitalet, DenmarkUpdated: May 11, 2026Locations: 3
Eligibility criteria

Patients referred to the ENT outpatient clinic with a suspected PTA. [+1]

Unable to understand the verbal information, participating in research. [+2]

Status: Recruiting

Orbital Vascular Inflammation in Ischemic Optic Neuropathy and Giant Cell Arteritis

Giant cell arteritis (GCA) is an inflammation of the blood vessels. A dangerous complication is sudden vision loss due to insufficient blood supply to the optic nerve. However, it is often difficult to distinguish acute vision loss due to GCA from a similar condition of insufficient blood supply to the optic nerve, called NAION. Quick treatment with anti-inflammatory medication is needed in case of GCA to prevent vision loss on the eye and other serious complications. Patients with NAION have no benefit of the medication, but can have serious side effects, why it is very important to differentiate between these conditions. In this project, the investigators will use FDG PET/MRI with Black Blood (BB) sequences and OCT-imaging to study patients with GCA and/or ischemic optic nerve disease. The investigators will look for signs of inflammation in and around the small vessels of the orbit using PET/MRI and study subtle retinal changes using OCT images. The investigators want to answer the following research questions: Do patients with ischemic optic nerve disease and GCA show signs of inflammation in the orbital vessel wall on PET/MRI-scans, that are not present in patients with NAION? Do GCA patients without vision loss, but with signs of orbital vessel wall inflammation on PET/MRI-scans, have a higher risk of later vision loss than GCA patients without? Can subtle changes in the retina, detectable through OCT, help distinguish between GCA-related vision loss and NAION? This will, to our knowledge, be the first study to systematically use FDG PET/MRI BB-scans to illuminate vascular changes in the orbit of patients with GCA and/or ischemic optic nerve disease. The results may improve diagnosis and treatment of GCA and NAION in the future. The investigators hope that this will help prevent blindness and other serious complications in patients with GCA, while also avoiding unnecessary treatments for patients with NAION.

Participants needed: 122
Trial details
Age: 50+Biological sex: AllType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: May 7, 2026Locations: 1
Eligibility criteria

Clinical suspicion of newly onset ischemic optic neuropathy (A-AION or NA-AION),... [+4]

Ferromagnetic implants [+6]

Status: Recruiting

Physical Mobilisation to Acquired Brain Injury Patients in Intensive Care Units: a Prospective Cohort Study

The objective of this study is to quantify the amount of physical mobilisation provided to patients with moderate to severe acquired brain injury in Scandinavian neuro-ICs, and the association between intensity and duration of mobilisation, physiological data perceived to be related to the safety of high-level mobilisation, and amount of high-level mobilisation during the neuro-ICU stay.

Participants needed: 198
Trial details
Age: 18+Biological sex: AllType: ObservationalSponsor: Rigshospitalet, DenmarkUpdated: Apr 23, 2026Locations: 2
Eligibility criteria

Adults (age ≥ 18 years) [+3]

Patients that are not likely to survive or for whom a decision has been made on... [+1]