Catheter Thrombosis

The goal of this observational study is to describe characteristics of catheter related thrombosis (CRT) that persists after catheter extraction in condition of intensive care unit. The main questions it aims to answer are: 1. What is the incidence of CRT that persists after catheter extraction in patients hospitalized in the intensive care unit? 2. What are the risk factors for this phenomenon? 3. What is the fate of such a thrombus, including recanalization or the development of complications such as pulmonary embolism or post-thrombotic syndrome?