Monitoring the patient's physiological parameters through clinical observation and information obtained through monitoring devices is important for early detection of problems that can occur during IVCS. The importance of clinical observation is realized when monitoring is described as an art where our eyes, ears, fingers, and even nose gather more information than the instruments we use. Clearly, clinical correlation and appropriate management are necessary for effective patient care because monitoring devices provide only data. In addition to patient care during IVCS, maintenance of monitoring equipment and repair of malfunctioning equipment are important for patient safety. Collection of data through accurate record keeping is valuable for quality assurance as well as in future developments and modification of patient care standards during IVCS.