ArticleEuropean journal of anaesthesiology2018
Haemodilution and head-down tilting induce functional injury in the rat optic nerve: A model for peri-operative ischemic optic neuropathy.
Article in European journal of anaesthesiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed, 19 citations in OpenAlex.
- Promotion of axon regeneration and protection on injured retinal ganglion cells by rCXCL2.Inflammation and regeneration · 2023Article
- Perioperative Care of the Patient with Eye Pathologies Undergoing Nonocular Surgery.Anesthesiology · 2022Article
- Sirt5-mediated desuccinylation of OPTN protects retinal ganglion cells from autophagic flux blockade in diabetic retinopathy.Cell death discovery · 2022Article
- Non-invasive visual evoked potentials under sevofluraneHeliyon · 2021Article
- Comparing the effect of positioning on cerebral autoregulation during radical prostatectomy: a prospective observational study.Journal of clinical monitoring and computing · 2021Observational
- Autophagy and post-ischemic conditioning in retinal ischemia.Autophagy · 2021Article
- Uptake and Distribution of Administered Bone Marrow Mesenchymal Stem Cell Extracellular Vesicles in Retina.Cells · 2021Article
- Perioperative Visual Loss in Cardiac Surgery.Journal of cardiothoracic and vascular anesthesia · 2019Review
- Mesenchymal stem cell-derived extracellular vesicles and retinal ischemia-reperfusion.Biomaterials · 2019Article
- Update on Perioperative Ischemic Optic Neuropathy Associated With Non-ophthalmic Surgery.Frontiers in neurology · 2018Review
- Keep an eye on acute optic neuropathy.Taiwan journal of ophthalmologyArticle
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Authors and funding
3 authors at 3 institutions in 1 country.
Funding
Abstract
backgroundMechanisms of peri-operative ischaemic optic neuropathy remain poorly understood. Both specific pre-operative and intra-operative factors have been examined by retrospective studies, but no animal model currently exists.
objectivesTo develop a rodent model of peri-operative ischaemic optic neuropathy. In rats, we performed head-down tilt and/or haemodilution, theorising that the combination damages the optic nerve.
designAnimal study.
settingLaboratory. ANIMALS: A total of 36 rats, in four groups, completed the functional examination of retina and optic nerve after the interventions.
interventionsAnaesthetised groups (n>8) were supine (SUP) for 5 h, head-down tilted 70° for 5 h, head-down tilted/haemodiluted for 5 h or SUP/haemodiluted for 5 h. We measured blood pressure, heart rate, intra-ocular pressure and maintained constant temperature. MAIN OUTCOME MEASUREMENTS: Retinal function (electroretinography), scotopic threshold response (STR) (for retinal ganglion cells) and visual evoked potentials (VEP) (for transmission through the optic nerve). We imaged the optic nerve in vivo and evaluated retinal histology, apoptotic cells and glial activation in the optic nerve. Retinal and optic nerve function were followed to 14 and 28 days after experiments.
resultsAt 28 days in head down tilted/haemodiluted rats, negative STR decreased (about 50% amplitude reduction, P = 0.006), VEP wave N2-P3 decreased (70% amplitude reduction, P = 0.01) and P2 latency increased (35%, P = 0.003), optic discs were swollen and glial activation was present in the optic nerve. SUP/haemodiluted rats had decreases in negative STR and increased VEP latency, but no glial activation.
conclusionAn injury partly resembling human ischaemic optic neuropathy can be produced in rats by combining haemodilution and head-down tilt. Significant functional changes were also present with haemodilution alone. Future studies with this partial optic nerve injury may enable understanding of mechanisms of peri-operative ischaemic optic neuropathy and could help discover preventive or treatment strategies.
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