Smith & Nephew Opsite™ IV3000™ 1-Hand Delivery Moisture Responsive Catheter Dressing 2-3/8" x 2-3/4", Peripheral Smith & Nephew Opsite™ IV3000™ 1-Hand Delivery Moisture Responsive Catheter Dressing is a moisture responsive transparent film dressing specifically designed to meet the needs of catheter fixation and to keep the catheter site dry. It offers safe and secure catheter fixation and provides quick and easy aseptic application to all major catheter types.