Patient-Controlled Sedation in Port Implantation (PACSPI-2)

The goal of the study is to determine if patient-controlled sedation (PCS) with propofol and alfentanil reduces patient-reported pain perception during implantation of subcutaneous venous port (SVP). The main question it aims to answer: How much pain did you (patient) experience during SVP-implantation Several other questions will be answered regarding: patient´s perception of the procedure, complication rate, procedure data. The study contains two groups which will be compared. Control group: will do SVP implantation under local anaesthesia Study group: will do SVP implantation under local anaesthesia and patient-controlled sedation. The patients are asked to complete a questionnaire postoperatively which contains questions on pain perception and satisfaction.