The Global Diagnostic Catheter Market was worth USD 3.02 billion in 2016 and estimated to be growing at a CAGR of 7.3%, to reach USD 4.3 billion by 2021. Catheters are thin tubes made of medical grade material such as plastic, silicon rubber, polyvinyl chloride (PVC), and nylon, which are inserted in the patient’s body for therapeutic and diagnostic purposes.