OBJECTIVE: The optic nerve is part of the central nervous system, and a rise in intracranial pressure (ICP) can directly affect the perioptic nerve space, leading to an increase in nerve diameter. Transorbital sonography is a safe and easy-to-perform method to measure optic nerve diameter for rapid diagnosis of increased ICP. METHODS: The optic nerve diameter was measured in 3 individual occasions by transorbital sonography in the transverse view, 3 mm posterior to the papilla in both eyes, and the mean was calculated. Two groups were examined: a control group of children with normal ICP and normal ophthalmologic and optic nerve examination results and a case group with increased ICP as determined by an alternative method. RESULTS: The sample consisted of 156 children, of which 78 (50%) were in the case group and 78 (50%) were in the control group. Eighty-four subjects (53.7%) were male, and 72 (46.1%) were female. The mean +/- SD ages were 6.9 +/- 5.6 years in the case group and 6.8 +/- 5.5 years in the control group. The mean optic nerve diameters were 5.6 +/- 0.6 mm (range, 4.55 +/- 0.7 to 7.6 +/- 0.6 mm) in the case group and 3.3 +/- 0.6 mm (range, 2 +/- 0.6 to 4.35 +/- 0.6 mm) in the control group. The difference in the means was significant at P < .001. CONCLUSIONS: Optic nerve diameter, measured by transorbital sonography, was significantly greater in pediatric patients with increased ICP compared with a control group. Transorbital sonography can be used to identify pediatric patients with raised ICP.
OBJECTIVE: The optic nerve is part of the central nervous system, and a rise in intracranial pressure (ICP) can directly affect the perioptic nerve space, leading to an increase in nerve diameter. Transorbital sonography is a safe and easy-to-perform method to measure optic nerve diameter for rapid diagnosis of increased ICP. METHODS: The optic nerve diameter was measured in 3 individual occasions by transorbital sonography in the transverse view, 3 mm posterior to the papilla in both eyes, and the mean was calculated. Two groups were examined: a control group of children with normal ICP and normal ophthalmologic and optic nerve examination results and a case group with increased ICP as determined by an alternative method. RESULTS: The sample consisted of 156 children, of which 78 (50%) were in the case group and 78 (50%) were in the control group. Eighty-four subjects (53.7%) were male, and 72 (46.1%) were female. The mean +/- SD ages were 6.9 +/- 5.6 years in the case group and 6.8 +/- 5.5 years in the control group. The mean optic nerve diameters were 5.6 +/- 0.6 mm (range, 4.55 +/- 0.7 to 7.6 +/- 0.6 mm) in the case group and 3.3 +/- 0.6 mm (range, 2 +/- 0.6 to 4.35 +/- 0.6 mm) in the control group. The difference in the means was significant at P < .001. CONCLUSIONS: Optic nerve diameter, measured by transorbital sonography, was significantly greater in pediatric patients with increased ICP compared with a control group. Transorbital sonography can be used to identify pediatric patients with raised ICP.
Authors: Jennifer R Marin; Alyssa M Abo; Alexander C Arroyo; Stephanie J Doniger; Jason W Fischer; Rachel Rempell; Brandi Gary; James F Holmes; David O Kessler; Samuel H F Lam; Marla C Levine; Jason A Levy; Alice Murray; Lorraine Ng; Vicki E Noble; Daniela Ramirez-Schrempp; David C Riley; Turandot Saul; Vaishali Shah; Adam B Sivitz; Ee Tein Tay; David Teng; Lindsey Chaudoin; James W Tsung; Rebecca L Vieira; Yaffa M Vitberg; Resa E Lewiss Journal: Crit Ultrasound J Date: 2016-11-03
Authors: Nicholas A V Beare; Simon J Glover; Susan Lewallen; Terrie E Taylor; Simon P Harding; Malcolm E Molyneux Journal: Am J Trop Med Hyg Date: 2012-10-01 Impact factor: 2.345
Authors: Nicholas A V Beare; Sam Kampondeni; Simon J Glover; Elizabeth Molyneux; Terrie E Taylor; Simon P Harding; Malcolm E Molyneux Journal: Trop Med Int Health Date: 2008-10-13 Impact factor: 2.622