National And Kapodistrian University Of Athens

This study tests whether a special membrane made from a patient's own blood (L-PRF) helps bone heal better after a tooth is pulled, before placing a dental implant. Forty adults needing a single tooth extraction were randomly assigned to one of four socket treatments: natural hea…

This study tests if placing a lead apron (normally worn by staff) over a patient's lower belly can reduce radiation exposure for doctors performing heart procedures through the wrist. About 500 adults having heart tests or treatments will take part. The goal is to see if this sim…

This study compares a new asymmetrical high-flow oxygen device to standard oxygen therapy in 63 adults recovering from heart surgery. The goal is to see if the new device helps patients breathe better and avoid needing a breathing tube again. Participants will be monitored for at…

This study tests a non-invasive treatment called pulsed radiofrequency (PRF) for knee pain caused by osteoarthritis. Fifty adults aged 40-75 with chronic knee pain will receive either real PRF or a sham procedure to see if it reduces pain and improves function. The goal is to off…

This observational study follows 40 patients with chronic sinusitis and nasal polyps, with or without severe asthma, who are taking mepolizumab. Researchers will collect nasal, blood, and sputum samples over 12 months to track changes in symptoms, airway bacteria, and gene activi…