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ISSN 1684-1824 (Electronic)

2022, Number 4

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Rev Méd Electrón 2022; 44 (4)

Ultrasonography of the optic nerve sheath diameter in patient with complicated meningoencephalitis

Sosa-Remón A, Boch-Rodríguez W, Jerez-Álvarez AE, Remón-Chávez CE, Jerez-Álvarez GA

Language: Spanish
References: 16
Page: 739-747
PDF size: 1200.85 Kb.


ABSTRACT

The optic nerve sheath ultrasonography is a non-invasive method for monitoring intracranial pressure. It has been used in multiple neurocritical pathologies, including the complicated infection of the central nervous system. The case of a 47-year-old female patient is presented; she was admitted to the Intensive Care Unit after presenting progression to comatose state secondary to bacterial meningoencephalitis. On admission, bilateral arreactive mydriasis, partial absence of brainstem reflexes and bradycardia are confirmed. Given the clinical suspicion of intracranial hypertension, ultrasonography of the optic nerve sheath diameter in the axial plane is indicated. Three measurements were made for each eye, showing a value of 6.3, 6.6 and 6.00 in the right eye, and 6.8, 6.6 and 6.8 in the left one (biocular average: 6.5 mm). With this measurement the suspected diagnosis was completed. This technique represents a secure and non-invasive procedure. Its use completes the data collected in the clinical examination. The universally accepted cut-off point for diagnosis is 5.0 mm or more for an intracranial pressure value of > 20 mmHg.


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