Ilenia Di Paola

Background: Comparing intraocular pressure (IOP) changes (ΔIOP) between obese subjects and non-obese controls in relation to different positions: standing, sitting, supine. Methods: the IOP was measured in both obese patients and non-obese controls groups with Tono-Pen AVIA in different positions following this sequence: after 5 min (5′) in the standing position, sitting, supine, supine after 5 min (supine 5′) and immediately after standing. ΔIOP values obtained comparing all positions were, therefore, evaluated. Results: 92 eyes of 46 obese subjects aged between 18 and 59 years (mean 38.07 ± 11.51 years) and of a Body Mass Index (BMI) between 31.84 and 60.65 (mean 41.84 ± 7.05) were evaluated. A total of 48 eyes of 24 non-obese controls aged between 23 and 55 (mean 35.21 ± 11.96 years) and of a BMI between 18.20 and 26.79 (mean 21.04 ± 2.36) were also recruited. In obese subjects, there were statistically significant differences between the IOP in the supine position and the supine positions 5′ with all other IOP measurements (p < 0.05). There were statistically significant differences between ΔIOP in both supine positions and prolonged standing positions obtained by obese subjects and non-obese controls (p < 0.05). Conclusions: In obese subjects, there is a statistically significant increase in IOP in the supine positions that is significantly greater than the non-obese population. BMI is weakly correlated with IOP and ΔIOP in postural changes.

Background:to compare intraocular pressure (IOP) changes (ΔIOP) between obese patients and normal weight controls in relation to different positions: standing, sitting and supine. Subjects and Methods: Patients candidates for bariatric surgery and normal weight controls. IOP was measured both in patients and controls with Tono-Pen AVIA in different positions. The utilized sequence was: after 5 minutes (5’) in standing position, sitting, supine, 5’supine, and immediately after standing. ΔIOP obtained by supine positions and all other positions were therefore evaluated. Results: Ninenty-two eyes of 46 obese patients (14 males) with an age between 18 and 59 years (mean 38.07±11.51 years) and BMI between 31.84 and 60.65 (mean 41.84±7.05) were evaluated. Forty-eight eyes of 24 normal weight controls (5 males) aged between 23 and 55 (mean 35.21±11.96 years) and BMI between 18.20 and 26.79 (mean 21.04±2.36) were also recruited. In obese patients there were statistically significant differences between IOP in supine position and supine positions 5’ with all other IOP measurements (all PConclusions: In obese patients there is a statistically significant increase in IOP in the supine positions that is significantly greater than normal weight population. BMI is weakly correlated with IOP and ΔIOP in postural changes.

How to cite this article: Di Paola I, Graziano M, Cornetta P. Effect of Percutaneous Tracheostomy on Optic Nerve Sheath Diameter (TONS Trial). Indian J Crit Care Med 2022;26(5):653.