A partir de cette page vous pouvez :
Retourner au premier écran avec les dernières notices... |
Détail de l'auteur
Auteur Michael Sullivan-Mee
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la rechercheChange in Intraocular Pressure and Ocular Perfusion Pressure Due to Trendelenburg Positioning / Lauren Ristin in OVS : Optometry & Vision Science, vol. 97, 10 (Octobre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 10 (Octobre 2020)
Titre : Change in Intraocular Pressure and Ocular Perfusion Pressure Due to Trendelenburg Positioning Type de document : article de périodique Auteurs : Lauren Ristin ; Sarah Dougherty Wood ; Michael Sullivan-Mee ; Andrew Rixon ; Brett Bence ; Rex Ballinger Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Position déclive
[Thésaurus Mesh]Pression sanguine
[Thésaurus HELB]:Optique:pression intraoculaireMots-clés : relations dynamiques pression de perfusion oculaire moyenne Résumé : SIGNIFICANCE: This study increases foundational knowledge about the dynamic relationships between intraocular pressure (IOP), blood pressure (BP), and mean ocular perfusion pressure (MOPP) in the setting of steep Trendelenburg positioning and may inform medical decision making for patients in which this positioning is planned. PURPOSE: The purpose of this study was to explore the demographic and clinical factors related to IOP, MOPP, and BP change during Trendelenburg positioning in a large sample of subjects. METHODS: A single-cohort interventional study was conducted at the American Academy of Optometry 2017 annual meeting. Baseline demographic data were collected by a secure survey tool. IOP and BP were then measured while seated and again after 1 and 2 minutes in a steep Trendelenburg position. Raw and percentage differences for each variable were compared between time points, and regression analyses demonstrated factors related to change in IOP, BP, and MOPP during steep Trendelenburg positioning. RESULTS: Median IOP increased from 16.3 mmHg (13.3 to 18.3 mmHg) at baseline to 25.0 mmHg (21.7 to 28.7 mmHg) at 1 minute after assuming the Trendelenburg position. More than 95% of individual eyes exhibited an IOP increase of at least 10%, and 45% had an IOP increase of 10 mmHg or greater. Correspondingly, MOPP fell from 50.3 mmHg (43.4 to 55.4 mmHg) at baseline to 36.3 mmHg (31.9 to 43.3 mmHg). Mean ocular perfusion pressure decreased by at least 10 in 90% of eyes. In multivariate regression analysis, factors independently related to percentage IOP increase were increasing weight, less myopic refractive error, lower baseline pulse, and lower baseline IOP (total r 2 = 0.31, P < .001). Conversely, weight was the only variable independently related to percent MOPP change, and this relationship was weak (r 2 = 0.05, P = .008). CONCLUSIONS: Our results confirm that steep Trendelenburg positioning causes an increase in IOP and a decrease in MOPP in almost all eyes. Considering the identified causative factors will inform clinical education and provide foundational knowledge for future investigations Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Corneal Biomechanical Changes Caused by Acute Elevation of IOP in Eyes with and without Glaucoma / Suchitra Katiyar in OVS : Optometry & Vision Science, vol. 98, 04 (Avril 2021)
[article]
in OVS : Optometry & Vision Science > vol. 98, 04 (Avril 2021)
Titre : Corneal Biomechanical Changes Caused by Acute Elevation of IOP in Eyes with and without Glaucoma Type de document : article de périodique Auteurs : Suchitra Katiyar ; Jennifer Tong ; Denise Pensyl ; Michael Sullivan-Mee Année de publication : 2021 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Optique:pression intraoculaire
[Thésaurus HELB]:Paramédical:biomécanique
[Thésaurus Mesh]Cornée
[Thésaurus Mesh]Glaucome
[Thésaurus Mesh]OphtalmodynamométrieMots-clés : hystérésis cornéenne Résumé : SIGNIFICANCE: Although corneal biomechanical parameters are well linked with glaucoma, their clinical utility
has not yet been fully elucidated. This study was designed to provide unique evidence about the dynamic nature
of corneal biomechanical parameters and their potential prognostic ability for glaucoma.
PURPOSE: This study aimed to evaluate the effect of acute intraocular pressure (IOP) elevation on corneal hysteresis (CH) and corneal resistance factor (CRF) and the associations of these biomechanical parameters with
glaucomatous disease.
METHODS: Subjects participating in a prospective, longitudinal glaucoma research study had CH and CRF measured
before and during ophthalmodynamometry during visits in the years 2011 to 2012. All participants were diagnosed
with primary open-angle glaucoma, ocular hypertension, glaucoma suspect, or normal eyes and had a minimum of
3 years of study participation with at least five reliable visual field (VF) tests. Changes in CH, CRF, and IOP induced
by ophthalmodynamometry were compared between diagnostic groups and evaluated for relationships with existing
and future glaucomatous VF loss.
RESULTS: In 248 eyes of 248 subjects followed up for 7.7 ± 2.3 years, ophthalmodynamometry induced a mean
IOP increase from 15.1 to 29.9 mmHg, causing a mean 34 ± 28% increase in CRF and 21 ± 25% decrease in CH.
Magnitude of CH change did not differ between diagnostic groups or between eyes that did (n = 20) and did not
(n = 95) develop new VF loss during the study period, nor was it related to rate of future VF progression.
CONCLUSIONS: Ophthalmodynamometry-induced IOP elevation resulted in significant acute changes in CH and
CRF in this study; this suggests accounting for IOP may be important in clinical interpretation of these parameters.
However, because the degree of CH change was not related to glaucoma or its progression, acute changes in CH
and CRF do not seem to have a prognostic value for glaucoma.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire