Validation of sensor for postoperative positioning with intraocular gas

Frank L Brodie,1 Kelly Y Woo,2 Ashwin Balakrishna,2 Hyuck Choo,2 Robert H Grubbs2 1Department of Ophthalmology, University of California San Francisco, San Francisco, 2Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA Purpose: Surgical repair of retinal attac...

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Autores principales:	Brodie FL, Woo KY, Balakrishna A, Choo H, Grubbs RH
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	Postoperative positioning Intraocular gas Vitrectomy Retinal detachment Macular hole Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/640705767461479a9dfd12155a7a5dde
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spelling	oai:doaj.org-article:640705767461479a9dfd12155a7a5dde2021-12-02T05:02:50ZValidation of sensor for postoperative positioning with intraocular gas1177-5483https://doaj.org/article/640705767461479a9dfd12155a7a5dde2016-05-01T00:00:00Zhttps://www.dovepress.com/validation-of-sensor-for-postoperative-positioning-with-intraocular-ga-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Frank L Brodie,1 Kelly Y Woo,2 Ashwin Balakrishna,2 Hyuck Choo,2 Robert H Grubbs2 1Department of Ophthalmology, University of California San Francisco, San Francisco, 2Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA Purpose: Surgical repair of retinal attachment or macular hole frequently requires intraocular gas. This necessitates specific postoperative positioning to improve outcomes and avoid complications. However, patients struggle with correct positioning. We have developed a novel sensor to detect the position of the gas bubble in the eye and provide feedback to patients in real time. In this paper, we determine the specificity and sensitivity of our sensor in vitro using a model eye. Methods: We assessed the reliability of our sensor to detect when a gas bubble has deviated off a model retinal break in a model eye. Various bubble sizes representing the intraocular kinetics of sulfur hexafluoride gas and varying degrees of deviation from the correct position were tested using the sensor attached to a mannequin head with a model eye. Results: We recorded 36 data points. The sensor acted appropriately in 33 (91.7%) of them. The sensor triggered the alarm every time the bubble deviated off the break (n=15, sensitivity =100%). However, it triggered the alarm (falsely) 3/21 times when the bubble was correctly positioned over the retinal break (specificity =86%). Conclusion: Our device shows excellent sensitivity (100%) and specificity (86%) in detecting whether intraocular gas is tamponading a retinal break in a model eye. Keywords: postoperative positioning, intraocular gas, vitrectomy, retinal detachment, macular hole, pneumatic retinopexyBrodie FLWoo KYBalakrishna AChoo HGrubbs RHDove Medical PressarticlePostoperative positioningIntraocular gasVitrectomyRetinal detachmentMacular holeOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2016, Iss Issue 1, Pp 955-960 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Postoperative positioning Intraocular gas Vitrectomy Retinal detachment Macular hole Ophthalmology RE1-994
spellingShingle	Postoperative positioning Intraocular gas Vitrectomy Retinal detachment Macular hole Ophthalmology RE1-994 Brodie FL Woo KY Balakrishna A Choo H Grubbs RH Validation of sensor for postoperative positioning with intraocular gas
description	Frank L Brodie,1 Kelly Y Woo,2 Ashwin Balakrishna,2 Hyuck Choo,2 Robert H Grubbs2 1Department of Ophthalmology, University of California San Francisco, San Francisco, 2Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA Purpose: Surgical repair of retinal attachment or macular hole frequently requires intraocular gas. This necessitates specific postoperative positioning to improve outcomes and avoid complications. However, patients struggle with correct positioning. We have developed a novel sensor to detect the position of the gas bubble in the eye and provide feedback to patients in real time. In this paper, we determine the specificity and sensitivity of our sensor in vitro using a model eye. Methods: We assessed the reliability of our sensor to detect when a gas bubble has deviated off a model retinal break in a model eye. Various bubble sizes representing the intraocular kinetics of sulfur hexafluoride gas and varying degrees of deviation from the correct position were tested using the sensor attached to a mannequin head with a model eye. Results: We recorded 36 data points. The sensor acted appropriately in 33 (91.7%) of them. The sensor triggered the alarm every time the bubble deviated off the break (n=15, sensitivity =100%). However, it triggered the alarm (falsely) 3/21 times when the bubble was correctly positioned over the retinal break (specificity =86%). Conclusion: Our device shows excellent sensitivity (100%) and specificity (86%) in detecting whether intraocular gas is tamponading a retinal break in a model eye. Keywords: postoperative positioning, intraocular gas, vitrectomy, retinal detachment, macular hole, pneumatic retinopexy
format	article
author	Brodie FL Woo KY Balakrishna A Choo H Grubbs RH
author_facet	Brodie FL Woo KY Balakrishna A Choo H Grubbs RH
author_sort	Brodie FL
title	Validation of sensor for postoperative positioning with intraocular gas
title_short	Validation of sensor for postoperative positioning with intraocular gas
title_full	Validation of sensor for postoperative positioning with intraocular gas
title_fullStr	Validation of sensor for postoperative positioning with intraocular gas
title_full_unstemmed	Validation of sensor for postoperative positioning with intraocular gas
title_sort	validation of sensor for postoperative positioning with intraocular gas
publisher	Dove Medical Press
publishDate	2016
url	https://doaj.org/article/640705767461479a9dfd12155a7a5dde
work_keys_str_mv	AT brodiefl validationofsensorforpostoperativepositioningwithintraoculargas AT wooky validationofsensorforpostoperativepositioningwithintraoculargas AT balakrishnaa validationofsensorforpostoperativepositioningwithintraoculargas AT chooh validationofsensorforpostoperativepositioningwithintraoculargas AT grubbsrh validationofsensorforpostoperativepositioningwithintraoculargas
_version_	1718400713093021696

Validation of sensor for postoperative positioning with intraocular gas

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