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Article: Comparing a new hydroexpression technique with conventional forceps method for SMILE lenticule removal

TitleComparing a new hydroexpression technique with conventional forceps method for SMILE lenticule removal
Authors
Issue Date2018
PublisherBMJ Publishing Group. The Journal's web site is located at http://bjo.bmjjournals.com/
Citation
British Journal of Ophthalmology, 2018, v. 102 n. 8, p. 1122-1126 How to Cite?
AbstractBackground We described a modified 'hydroexpression' technique for the lenticule removal during small-incision lenticule extraction (SMILE) surgery and compared the results with conventional forceps method. Methods This was a retrospective, comparative study of 50 patients who underwent SMILE surgery by the same surgeon. We compared the 1-week and 3-months postoperative results after SMILE using the hydroexpression technique with the conventional forceps technique. Main outcome measures included uncorrected distance visual acuity, corrected distance visual acuity, refractive accuracy, safety index and efficacy index. Results The baseline characteristics were comparable between both groups. At postoperative 1 week, the safety index in forceps and hydroexpression group was 0.93±0.11 and 0.97±0.10, respectively (P=0.246). At 3 months, they were 1.00±0.06 and 0.99±0.09 (P=0.850). For efficacy indices, at 1 week they were 0.84±0.17 and 0.91±0.17 (P=0.158). At 3 months, they were 0.92±0.13 and 0.94±0.19 (P=0.624). All eyes aimed for a plano target. 96% in forceps group and 90% in hydroexpression group were within ±0.50 dioptre (D) in spherical equivalent refraction (SEQ) correction at postoperative 3 months (P=0.567). The mean errors of SEQ correction were '0.10±0.21 D in forceps group and '0.08±0.30 D in hydroexpression group (P=0.705). Conclusion Hydroexpression was simple and safe and had early results comparable to the conventional forceps technique. This technique was particularly useful for cases with more adhesions between lenticule and anterior cap, thin lenticule cases and for the inexperienced SMILE surgeons. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.
Persistent Identifierhttp://hdl.handle.net/10722/249559
ISSN
2017 Impact Factor: 3.384
2015 SCImago Journal Rankings: 1.873
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNg, LKA-
dc.contributor.authorCheng, GPM-
dc.contributor.authorWoo, CPV-
dc.contributor.authorJhanji, V-
dc.contributor.authorChan, TCY-
dc.date.accessioned2017-11-21T03:03:54Z-
dc.date.available2017-11-21T03:03:54Z-
dc.date.issued2018-
dc.identifier.citationBritish Journal of Ophthalmology, 2018, v. 102 n. 8, p. 1122-1126-
dc.identifier.issn0007-1161-
dc.identifier.urihttp://hdl.handle.net/10722/249559-
dc.description.abstractBackground We described a modified 'hydroexpression' technique for the lenticule removal during small-incision lenticule extraction (SMILE) surgery and compared the results with conventional forceps method. Methods This was a retrospective, comparative study of 50 patients who underwent SMILE surgery by the same surgeon. We compared the 1-week and 3-months postoperative results after SMILE using the hydroexpression technique with the conventional forceps technique. Main outcome measures included uncorrected distance visual acuity, corrected distance visual acuity, refractive accuracy, safety index and efficacy index. Results The baseline characteristics were comparable between both groups. At postoperative 1 week, the safety index in forceps and hydroexpression group was 0.93±0.11 and 0.97±0.10, respectively (P=0.246). At 3 months, they were 1.00±0.06 and 0.99±0.09 (P=0.850). For efficacy indices, at 1 week they were 0.84±0.17 and 0.91±0.17 (P=0.158). At 3 months, they were 0.92±0.13 and 0.94±0.19 (P=0.624). All eyes aimed for a plano target. 96% in forceps group and 90% in hydroexpression group were within ±0.50 dioptre (D) in spherical equivalent refraction (SEQ) correction at postoperative 3 months (P=0.567). The mean errors of SEQ correction were '0.10±0.21 D in forceps group and '0.08±0.30 D in hydroexpression group (P=0.705). Conclusion Hydroexpression was simple and safe and had early results comparable to the conventional forceps technique. This technique was particularly useful for cases with more adhesions between lenticule and anterior cap, thin lenticule cases and for the inexperienced SMILE surgeons. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.-
dc.languageeng-
dc.publisherBMJ Publishing Group. The Journal's web site is located at http://bjo.bmjjournals.com/-
dc.relation.ispartofBritish Journal of Ophthalmology-
dc.rightsBritish Journal of Ophthalmology. Copyright © BMJ Publishing Group.-
dc.titleComparing a new hydroexpression technique with conventional forceps method for SMILE lenticule removal-
dc.typeArticle-
dc.identifier.emailNg, LKA: nlk008@hku.hk-
dc.identifier.authorityNg, LKA=rp01842-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1136/bjophthalmol-2017-310993-
dc.identifier.scopuseid_2-s2.0-85050481170-
dc.identifier.hkuros283285-
dc.identifier.volume102-
dc.identifier.issue8-
dc.identifier.spage1122-
dc.identifier.epage1126-
dc.identifier.isiWOS:000445109400019-
dc.publisher.placeUnited Kingdom-

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