PO2 measurements using a double barelled recess type microelectrodes were measured in the optic nerve head of miniature pigs during systemic hyperoxia (100% oxygen breathing) and variations of the systemic blood pressure by intravenous injection of Adrenaline or trinitrine. During either systemic hyperoxia, or progressive variations of blood pressure, the intervascular PO2 remained stable. These results suggest a regulation of the tissue PO2 of the optic nerve head, as the retina does, at constant values.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Herpes zoster ophthalmicus with acute retrobulbar optic neuritis and abducens nerve palsy: a case report.
BMC Ophthalmol
January 2025
Isfahan Neurosciences Research Center, Alzahra Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
Herpes zoster Ophthalmicus (HZO) affecting the ophthalmic division (V1) of the trigeminal nerve. HZO may cause extraocular muscle palsies, with the third nerve being the most commonly affected and the fourth nerve the least. The combined involvement of the optic nerve and isolated paralysis of the eye muscle is very rare, with only limited case reports documenting this complication of ocular herpes zoster.
View Article and Find Full Text PDFStructural reversal of disc cupping measured in Bruch's membrane opening-based OCT morphometry after PRESERFLO microshunt implantation for open-angle glaucoma.
BMC Ophthalmol
January 2025
Department of Ophthalmology, Medical Faculty, University Hospital of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.
Background/ Aims: To analyze the longitudinal change in Bruch's membrane opening minimal rim width (BMO-MRW) and peripapillary retinal nerve fiber layer (pRNFL) thickness using optical coherence tomography (OCT) after implantation of a PRESERFLO® microshunt for surgical glaucoma management in adult glaucoma patients.
Methods: Retrospective data analysis of 59 eyes of 59 participants undergoing implantation of a PRESERFLO microshunt between 2019 and 2022 at a tertiary center for glaucoma management. Surgical management included primary temporary occlusion of the glaucoma shunt to prevent early hypotony.
Choroidal thickness under pilocarpine versus cyclopentolate.
Sci Rep
January 2025
Privatpraxis Prof Jonas und Dr Panda-Jonas, Heidelberg, Germany.
Bruch´s membrane (BM) is firmly connected posteriorly to the optic nerve head through the peripapillary choroidal border tissue, and anteriorly through the longitudinal ciliary muscle to the scleral spur. We assessed, whether a difference in the contractile state of the ciliary muscle influences the position of the posterior BM by lifting the posterior BM pole, i.e.
View Article and Find Full Text PDFSurgical-related Morphological Characteristics of Sphenoid Sinuses: A Comprehensive CT-Based Analysis.
J Clin Exp Dent
December 2024
PhD, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
Background: This study aims to assess the relationships between sphenoid sinus (SS) types, septation, lobulation, symmetry, septal deviation, and the variations in SS pneumatization regarding the surrounding neurovascular structures using Computed tomography (CT) images. Sexes and age groups were investigated.
Material And Methods: We retrospectively evaluated head CT-scans of 320 patients (age range 18-49 years); mean of 43.
Optic Perineuritis Secondary to CNS Involvement of Lymphoma.
Cureus
December 2024
Internal Medicine, University of South Florida, Tampa, USA.
CNS lymphoma is a rare form of non-Hodgkin lymphoma that primarily affects the brain, spinal cord, leptomeninges, or eyes, leading to severe neurological or ophthalmological complications. This case report details a 44-year-old male with human immunodeficiency virus and diffuse large B-cell lymphoma who experienced permanent vision loss due to optic perineuritis, a rare presenting symptom indicative of underlying CNS involvement. Despite previous remission, imaging revealed focal enhancements suggesting CNS lymphoma, highlighting diagnostic and management challenges in relapsed lymphoma, especially in immunocompromised patients.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!