Related Experiment Video
Updated: Nov 20, 2025
Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition
Published on: August 18, 2023
[Correlation between optic nerve sheath diameter and extracorporeal life support time]
Jorge Rivas-Rangel1, Maricela García-Arellano1, Juan M Marquez-Romero2
1Unidad de Cuidados Intensivos, Departamento de Pediatría, Centenario Hospital «Miguel Hidalgo», Aguascalientes, México.
Introduction:
The objective of the study was to analyse the correlation between extracorporeal life support (ECLS) and aortic cross-clamp times and optic nerve sheath diameter (ONSD).
Patients And Methods:
Study in a cohort of patients aged 0 to 15 years that underwent ECLS for cardiac surgery after obtention of signed informed consent. We calculated a sample size of 23 participants. First, we obtained 3 vertical and 3 horizontal measurements of the ONSD for each eye and calculated the mean of both eyes for each measurement to be used in the analysis. The measurements were made at admission and at 6 and 24hours post surgery. We retrieved the ECLS time and the aortic cross-clamp time were from the operative report.
Results:
We analysed data for 23 participants, 52.2% female, with a median age of 14 months. The median ECLS time was 60minutes; the median aortic cross-clamp time was 32minutes. The median baseline ONSD was 3.1mm. ONSD values had increased a median of 0.015mm at 6hours post surgery (P=.03). We found a positive correlation between ECLS time and ONSD values (r=0.476, p<,05). The ONSD values returned to baseline by 24hours post surgery. None of the patients developed signs or symptoms of increased intracranial pressure.
Conclusion:
Our study found a correlation between ECLS time and ONSD at 24hours post surgery. We found variations in the ONSD even in patients without signs or symptoms of increased increased intracranial pressure. Further research is required to identify the factors related to these variations.
