Related Experiment Video
Updated: Apr 18, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
[Shock-induced anterior ischemic optic neuropathy from hemorrhagic anemia]
S Kazerounian1, W Sekundo, K Droutsas
1Universitätsaugenklinik für Augenheilkunde, Philipps-Universität Marburg, Baldingerstr., 35043, Marburg, Deutschland, sara.kazerounian@gmail.com.
Abstract:
A 51-year-old diabetic and overweight male presented to our eye clinic with right-sided impairment of visual acuity and scotoma. A thorough work-up had been carried out at our institute 9 months prior to this event due to left-sided nonarteriitic anterior ischemic optic neuropathy (NAION). Despite the similarity of visual symptoms in the currently and previously affected eyes microcystic anemia (Hb 81 g/dl) associated with severe hemorrhoidal bleeding was diagnosed. The patient underwent surgical hemorrhoidectomy and received two red blood cell concentrates. Therefore, this article reports on an extraordinarily rare case of shock-induced anterior ischemic optic neuropathy (SIAION) caused by hemorrhoidal bleeding.
Related Concept Videos
Hemorrhagic Stroke ll: Pathophysiology
Hemorrhagic Stroke l: Introduction
Glaucoma: Overview
Blood Pressure Imbalances and Circulatory Shock
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
Ischemic Stroke ll: Pathophysiology
Transient Ischemic Attack l: Introduction

