(OM) Department of Neurology, The Johns Hopkins School of Medicine, Baltimore, Maryland; (DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
Subject
Hyperventilation
Description
Hyperventilation: instruct the patient to breathe rapidly in and out of their mouth for 40-60 seconds. Alkalosis and changes in ionized calcium may improve conduction through an affected segment of 8th cranial nerve due to vestibular schwannoma (https://collections.lib.utah.edu/details?id=1213447) or neurovascular compression, usually causing an excitatory (ipsilesional) nystagmus. When a chronic vestibular imbalance has been compensated for by central mechanisms, hyperventilation can cause a transient decompensation and bring out nystagmus with an ipsilesional slow phase. Hyperventilation can enhance/produce downbeat nystagmus in cerebellar disease (https://collections.lib.utah.edu/details?id=1427580&q=hyperventilation&fd=title_t%2Cdescription_t%2Csubject_t&facet_setname_s=ehsl_novel_gold).
Date
2022
Language
eng
Format
video/mp4
Type
Image/MovingImage
Collection
Neuro-Ophthalmology Virtual Education Library: Dan Gold Neuro-Ophthalmology Collection: https://novel.utah.edu/Gold/
Publisher
North American Neuro-Ophthalmology Society
Holding Institution
Spencer S. Eccles Health Sciences Library, University of Utah, 10 N 1900 E SLC, UT 84112-5890
