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Title: Age-Dependent Variation of Lamina Cribrosa Displacement During the Standardized Valsalva Maneuver
Authors: Kim, Y.W.
Lee, D.H.
Lim, H.B.
Oh, B.-L.
Kim, Y.K.
Girard, M.J.A. 
Mari, J.M.
Park, K.H.
Jeoung, J.W.
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: Kim, Y.W., Lee, D.H., Lim, H.B., Oh, B.-L., Kim, Y.K., Girard, M.J.A., Mari, J.M., Park, K.H., Jeoung, J.W. (2019). Age-Dependent Variation of Lamina Cribrosa Displacement During the Standardized Valsalva Maneuver. Scientific Reports 9 (1) : 6645. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Based on biomechanical theory, lamina cribrosa (LC) displacement, the key component of progressive glaucomatous change, is presumed to be dependent on intraocular pressure (IOP) as well as tissue stiffness of LC. In the performance of the Valsalva maneuver, both IOP and cerebrospinal fluid pressure can increase. The present study investigated the age-dependent variation of LC displacement during the standardized Valsalva maneuver in healthy subjects. Sixty-three (63) eyes (age range: 20–76 years) were prospectively underwent IOP measurement and Cirrus HD-OCT optic disc scans before and during the standardized Valsalva maneuver. During the standardized Valsalva maneuver, the IOP significantly increased from 13.2 ± 2.9 mmHg to 18.6 ± 5.2 mmHg (P < 0.001). The maximal LC depth significantly decreased in the younger age groups (age: 20 s to 40 s) but not in the older age groups (age: over 50). The BMO distance did not change significantly. Younger age (P = 0.009), a smaller increase of IOP during the Valsalva maneuver (P = 0.002), and greater baseline maximal LC depth (P = 0.013) were associated with more anterior displacement of the LC during the standardized Valsalva maneuver. Taken together, age as well as translaminar pressure dynamics seems to play a crucial role in LC biomechanics. © 2019, The Author(s).
Source Title: Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/s41598-019-43206-6
Rights: Attribution 4.0 International
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