Correlation between internal jugular vein collapsibility index and mean arterial pressure in assessing the response of fluid resuscitation in critically ill patients

Background: Response to resuscitative fluid administration is often difficult to assess clinically, especially in critically ill patients, and therefore it is necessary to use tools to evaluate the re-sponse. One of the modalities that can be used is ultrasonography to measure the internal jugular vein collapsibility index (IJVCI) during the res-piration cycle. Aim: To evaluate the correlation between IJVCI and mean arterial pressure (MAP) in assessing response to resuscitative fluid administration in critically ill patients. Patients and methods: This is an experimental study with pre-post test groups, assessing the response to resuscitative fluid administration in critically ill patients. Results: A total of 28 subjects aged 18-65 years. old were included in the inclusion criteria of this study. The average age of subjects was 50.18 years. Twenty-one subjects responded to the administration of 500 ml Ringer's lactate (RL) crystalloid fluid within 30 minutes based on the IJVCI. Subjects were observed in two periods, the pre-test and post-test periods. There was a significant difference in the IJVCI before and after 500 ml of RL between the two groups (p<0.05). As a predictor of IJVCI associated with increased MAP at the cut-off value of 44.40 with a sensitivity of 76.9% and a specificity of 80%. This study showed that IJVCI had a negative correlation with increased MAP (p<0.05). Conclusions: The measurement of the IJVCI can be used to assess the response to resuscitative fluid administration in critically ill patients.