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Optimization of orbital retraction during endoscopic transorbital approach via quantitative measurement of the intraocular pressure - [SevEN 006]

 Woohyun Kim  ;  Ju Hyung Moon  ;  Eui Hyun Kim  ;  Chang-Ki Hong  ;  Jisang Han  ;  Je Beom Hong 
 BMC OPHTHALMOLOGY, Vol.21(1) : 76, 2021-02 
Journal Title
Issue Date
Endoscopy ; Glaucoma* ; Humans ; Intraocular Pressure* ; Orbit / diagnostic imaging ; Orbit / surgery ; Tonometry, Ocular
Intraocular pressure ; Intraorbital pressure ; Orbital compression ; Transorbital approach
Background: Increased use of the transorbital approach (TOA) warrants greater understanding of the risk of increased intraocular pressure (IOP) and intraorbital pressure (IORP) due to orbital compression. We aimed to investigate the changes in IOP and IORP in response to orbital retraction in TOA and establish a method for the continuous measurement of intraoperative IORP.

Methods: We assessed nine patients who underwent TOA surgery from January 2017 to December 2019, in addition to five cadavers. IORP and IOP were measured using a cannula needle monitor, tonometer, cuff manometer, and micro strain gauge monitor.

Results: In all nine clinical cases and five cadavers, increased physical compression of the orbit increased the IOP and IORP in a curvilinear pattern. In clinical cases, when the orbit was compressed 1.5 cm from the lateral margin in the sagittal plane, the mean IOP and IORP were 25.4 ± 5.2 mmHg and 14 ± 9.2 mmH2O, respectively. The IORP satisfactorily reflected the IOP (Pearson correlation coefficient = 0.824, p < 0.001).

Conclusion: We measured IOP and IORP simultaneously during orbital compression to gain basic information on pressure changes. In clinical cases, the change in the IOP could be conveniently and noninvasively monitored using continuous IORP measurements.
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1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Woohyun(김우현) ORCID logo https://orcid.org/0000-0002-2936-3740
Kim, Eui Hyun(김의현) ORCID logo https://orcid.org/0000-0002-2523-7122
Moon, Ju Hyung(문주형)
Hong, Chang Ki(홍창기) ORCID logo https://orcid.org/0000-0002-2761-0373
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