Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects

Frank L Brodie,1 David A Ramirez,2,* Sundar Pandian,3,* Kelly Woo,3 Ashwin Balakrishna,3 Eugene De Juan,1 Hyuck Choo,3 Robert H Grubbs3 1Department of Ophthalmology, University of California San Francisco, San Francisco, CA, USA; 2School of Medicine, University of California San Francisco, San Fran...

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Autores principales:	Brodie FL, Ramirez DA, Pandian S, Woo K, Balakrishna A, De Juan E, Choo H, Grubbs RH
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2017
Materias:	Retinal detachment pneumatic retinopexy intraocular gas device postoperative positioning vitrectomy macular hole. Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/3041602455b045a2af43d4beccc81c4e
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spelling	oai:doaj.org-article:3041602455b045a2af43d4beccc81c4e2021-12-02T00:37:30ZNovel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects1177-5483https://doaj.org/article/3041602455b045a2af43d4beccc81c4e2017-05-01T00:00:00Zhttps://www.dovepress.com/novel-positioning-sensor-with-real-time-feedback-for-improved-postoper-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Frank L Brodie,1 David A Ramirez,2,* Sundar Pandian,3,* Kelly Woo,3 Ashwin Balakrishna,3 Eugene De Juan,1 Hyuck Choo,3 Robert H Grubbs3 1Department of Ophthalmology, University of California San Francisco, San Francisco, CA, USA; 2School of Medicine, University of California San Francisco, San Francisco, CA, USA; 3Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA *These authors contributed equally to this work Introduction: Repair of retinal detachment frequently requires use of intraocular gas. Patients are instructed to position themselves postoperatively to appose the intraocular bubble to the retinal break(s). We developed a novel wearable wireless positioning sensor, which provides real-time audiovisual feedback on the accuracy of positioning.Methods: Eight healthy volunteers wore the wireless sensor for 3 hours while instructed to maintain their head tilted toward the 2 o’clock meridian with no audiovisual feedback. Positioning accuracy was recorded. The subjects repeated the experiment for 3 hours with the audiovisual feedback enabled.Results: With no audiovisual feedback, the percentage of time greater than 10° out of position varied from 8.9% to 93.9%. With audiovisual feedback enabled, these percentages ranged from 9.4% to 65%. Three subjects showed significant improvement in their time out of position (P<0.01, Fisher’s exact test). Four subjects demonstrated a nonsignificant improvement, and one subject had a significant increase in time out of position with feedback (P<0.01). When pooled, all subjects demonstrated a statistically significant decrease in degrees out of position (P<0.001, Wilcoxon test) and a statistically significant improvement in total time out of position (P<0.001).Conclusion: The novel positioning sensor showed improved positioning compliance in half of the healthy volunteers during our short pilot study. Other subjects derived little benefit from the feedback. The causes for this observation are unclear. However, given the significant improvement as a group, this new technology could be beneficial to patients who struggle with postoperative positioning. Keywords: retinal detachment, pneumatic retinopexy, intraocular gas, device, postoperative positioning, vitrectomy, macular holeBrodie FLRamirez DAPandian SWoo KBalakrishna ADe Juan EChoo HGrubbs RHDove Medical PressarticleRetinal detachmentpneumatic retinopexyintraocular gasdevicepostoperative positioningvitrectomymacular hole.OphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 11, Pp 939-944 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Retinal detachment pneumatic retinopexy intraocular gas device postoperative positioning vitrectomy macular hole. Ophthalmology RE1-994
spellingShingle	Retinal detachment pneumatic retinopexy intraocular gas device postoperative positioning vitrectomy macular hole. Ophthalmology RE1-994 Brodie FL Ramirez DA Pandian S Woo K Balakrishna A De Juan E Choo H Grubbs RH Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
description	Frank L Brodie,1 David A Ramirez,2,* Sundar Pandian,3,* Kelly Woo,3 Ashwin Balakrishna,3 Eugene De Juan,1 Hyuck Choo,3 Robert H Grubbs3 1Department of Ophthalmology, University of California San Francisco, San Francisco, CA, USA; 2School of Medicine, University of California San Francisco, San Francisco, CA, USA; 3Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA *These authors contributed equally to this work Introduction: Repair of retinal detachment frequently requires use of intraocular gas. Patients are instructed to position themselves postoperatively to appose the intraocular bubble to the retinal break(s). We developed a novel wearable wireless positioning sensor, which provides real-time audiovisual feedback on the accuracy of positioning.Methods: Eight healthy volunteers wore the wireless sensor for 3 hours while instructed to maintain their head tilted toward the 2 o’clock meridian with no audiovisual feedback. Positioning accuracy was recorded. The subjects repeated the experiment for 3 hours with the audiovisual feedback enabled.Results: With no audiovisual feedback, the percentage of time greater than 10° out of position varied from 8.9% to 93.9%. With audiovisual feedback enabled, these percentages ranged from 9.4% to 65%. Three subjects showed significant improvement in their time out of position (P<0.01, Fisher’s exact test). Four subjects demonstrated a nonsignificant improvement, and one subject had a significant increase in time out of position with feedback (P<0.01). When pooled, all subjects demonstrated a statistically significant decrease in degrees out of position (P<0.001, Wilcoxon test) and a statistically significant improvement in total time out of position (P<0.001).Conclusion: The novel positioning sensor showed improved positioning compliance in half of the healthy volunteers during our short pilot study. Other subjects derived little benefit from the feedback. The causes for this observation are unclear. However, given the significant improvement as a group, this new technology could be beneficial to patients who struggle with postoperative positioning. Keywords: retinal detachment, pneumatic retinopexy, intraocular gas, device, postoperative positioning, vitrectomy, macular hole
format	article
author	Brodie FL Ramirez DA Pandian S Woo K Balakrishna A De Juan E Choo H Grubbs RH
author_facet	Brodie FL Ramirez DA Pandian S Woo K Balakrishna A De Juan E Choo H Grubbs RH
author_sort	Brodie FL
title	Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
title_short	Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
title_full	Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
title_fullStr	Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
title_full_unstemmed	Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
title_sort	novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects
publisher	Dove Medical Press
publishDate	2017
url	https://doaj.org/article/3041602455b045a2af43d4beccc81c4e
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Novel positioning sensor with real-time feedback for improved postoperative positioning: pilot study in control subjects

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