National And Kapodistrian University Of Athens

This study tests whether placing a lead apron (normally worn by staff) over a patient's lower belly and pelvis can reduce radiation exposure for doctors performing heart procedures through the wrist. 500 adult patients having diagnostic or treatment heart procedures will be rando…

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 a non-invasive treatment called pulsed radiofrequency (PRF) for chronic knee pain caused by osteoarthritis. Half of the 50 participants will receive the real PRF treatment, and the other half will receive a fake (sham) treatment, so we can see if PRF truly helps …

This study compares a new oxygen delivery device (asymmetrical high-flow nasal cannula) to standard oxygen methods 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…

This observational study follows 40 adults with chronic sinusitis with nasal polyps, with or without severe asthma, who are starting mepolizumab. Researchers collect nasal, blood, and sputum samples before treatment and at 3, 6, and 12 months to track changes in symptoms, gene ac…