Empty Sella in Neuro-Ophthalmology Patients Without Raised Intracranial Pressure.

Background: Empty sella often supports a diagnosis of raised intracranial pressure (ICP) but is also seen in normal individuals. This study's objective was to determine the prevalence of empty and partially empty sella in neuro-ophthalmology patients undergoing MRI for indications other than papilledema or raised ICP.

Methods: Consecutive patients without papilledema or suspected raised ICP who underwent brain MRI between August 2017 and May 2021 were included in this study.

Yield of screening blood work and MRI of the brain and orbits in the work-up of unilateral chronic optic neuropathy.

Background/objectives: No guidelines exist for the investigation of treatable causes of chronic optic neuropathy, including sarcoidosis, lupus, and syphilis. The purpose of this study was to determine the diagnostic yield of screening blood work (ACE (Angiotensin Converting Enzyme) for sarcoidosis, Antinuclear Antibodies (ANA) for lupus, CMIA (chemiluminescence microparticle enzyme immunoassay) for syphilis) and contrast-enhanced MRI brain and orbits in atypical unilateral chronic optic neuropathy.

Subjects/methods: Retrospective review from February 2012 to June 2018 at a neuro-ophthalmology practice.

Approach to a Patient with Diplopia in the Emergency Department.

Background: Diplopia can be the result of benign or life-threatening etiologies. It is imperative for the emergency physician to be proficient at assessing diplopia and recognize when urgent referral or neuroimaging is required.

Objective: The first part of this review highlights a simple framework to arrive at the appropriate disposition of diplopic patients presenting to the emergency department (ED).

Effect of Head Position and Weight Loss on Intraocular Pressure in Obese Subjects.

Purpose: To measure the influence of body weight on postural intraocular pressure (IOP) changes and to determine if significant weight loss effects IOP.

Patients And Methods: In this prospective case-control study 25 morbidly obese subjects scheduled for bariatric surgery and 25 age-matched and sex-matched normal weight controls were recruited. Subjects had tonometry performed in 7 positions with the order randomized: sitting with the neck in neutral position, neck flexion at 30 degrees, extension at 30 degrees, supine, right, and left lateral decubitus, and with the head and upper body elevated at 30 degrees.

The attitude of Canadian university students toward a behavior-based blood donor health assessment questionnaire.

Background: In Canada, all men who have sex with men (MSM) are indefinitely deferred from donating blood. The purpose of this study was to determine the acceptability of an alternative behavior-based donor health questionnaire among Canadian university students. Further we sought to determine the perception of blood safety associated with specific risk behaviors.