Ratio of optic nerve sheath diameter to eyeball transverse diameter in cardiac arrest survivors

Optic nerve sheath diameter (ONSD) is associated with poor neurological outcomes following resuscitation.1 2 However, the cut-off values of ONSD vary and are similar to those of normal adults.2 3 The ratio of ONSD to eyeball transverse diameter (ETD) would be a better indicator for intracranial hypertension.4 However, the performance of the ONSD/ETD ratio in cardiac arrest survivors has not been studied. We conducted a prospective age-matched and sex-matched nested case–control study to investigate the performance of sonographic ONSD and ONSD/ETD ratio between out-of-hospital cardiac arrest (OHCA) survivors with good and poor outcomes compared with healthy controls. Consecutive adult non-traumatic OHCA survivors between March 2020 and February 2021 and healthy controls were prospectively enrolled. Those with prior ophthalmological operations and a history of a brain tumour or brain surgery were excluded. Each OHCA survivor was matched to four controls...

Source: Emergency Medicine Journal - March 20, 2023 Category: Emergency Medicine Authors: Ling, D.-A., Chen, J.-Y., Chen, Y.-C., Ko, Y.-C., Chang, C.-H., Lien, W.-C., Chang, W.-T., Huang, C.-H. Tags: Research letter Source Type: research