Effects of Trabecular Meshwork Width and Schlemm’s Canal Area on Intraocular Pressure Reduction in Glaucoma Patients
Purpose: To evaluate the effects of baseline trabecular meshwork (TM) and Schlemm’s canal (SC) microstructures on intraocular pressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG).Methods: A total 69 eyes of POAG patients who had not been treated with IO...
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| Vydáno v: | Korean journal of ophthalmology Ročník 35; číslo 4; s. 311 - 317 |
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| Médium: | Journal Article |
| Jazyk: | angličtina |
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Korean Ophthalmological Society
01.08.2021
대한안과학회 |
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| ISSN: | 1011-8942, 2092-9382, 2092-9382 |
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| Abstract | Purpose: To evaluate the effects of baseline trabecular meshwork (TM) and Schlemm’s canal (SC) microstructures on intraocular pressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG).Methods: A total 69 eyes of POAG patients who had not been treated with IOP-lowering agent were enrolled in this retrospective study. The patients had been prescribed topical IOP-lowering agent and used it for 1 year. The morphologic features of the TM and SC were collected using anterior segment module of spectral-domain optical coherence tomography with enhanced depth imaging at baseline. Images of the nasal and temporal corneoscleral limbus were obtained with serial horizontal enhanced depth imaging B-scans and TM width and SC area were measured in each scan. We investigated the effects of baseline TM and SC microstructures on IOP reduction amount.Results: The baseline IOP of 69 glaucomatous eyes was 17.9 ± 3.8 mmHg, and the mean amount of IOP reduction was 3.5 ± 2.1 mmHg after 1 year. Mean TM widths of nasal and temporal sector were 470.33 ± 80.05 and 479.74 ± 79.59 μm, respectively. SC area was measured as 4,818.50 ± 1,464.28, 4,604.23 ± 1,567.73 μm2 at nasal sector and temporal sector, respectively. The correlation analysis revealed a positive correlation between SC area and average amount of IOP reduction, indicating that the larger baseline SC area, the greater the IOP drop with topical IOP-lowering agents. However, no correlation was found between TM width and IOP lowering amount in patients with POAG.Conclusions: The baseline SC area showed positive correlation with the IOP reduction amount in patients with POAG. This finding suggests that the SC area can be a clinical parameter to predict the IOP reduction amount before using IOP-lowering agents in POAG patient. |
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| AbstractList | To evaluate the effects of baseline trabecular meshwork (TM) and Schlemm's canal (SC) microstructures on intraocular pressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG).PURPOSETo evaluate the effects of baseline trabecular meshwork (TM) and Schlemm's canal (SC) microstructures on intraocular pressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG).A total 69 eyes of POAG patients who had not been treated with IOP-lowering agent were enrolled in this retrospective study. The patients had been prescribed topical IOP-lowering agent and used it for 1 year. The morphologic features of the TM and SC were collected using anterior segment module of spectral-domain optical coherence tomography with enhanced depth imaging at baseline. Images of the nasal and temporal corneoscleral limbus were obtained with serial horizontal enhanced depth imaging B-scans and TM width and SC area were measured in each scan. We investigated the effects of baseline TM and SC microstructures on IOP reduction amount.METHODSA total 69 eyes of POAG patients who had not been treated with IOP-lowering agent were enrolled in this retrospective study. The patients had been prescribed topical IOP-lowering agent and used it for 1 year. The morphologic features of the TM and SC were collected using anterior segment module of spectral-domain optical coherence tomography with enhanced depth imaging at baseline. Images of the nasal and temporal corneoscleral limbus were obtained with serial horizontal enhanced depth imaging B-scans and TM width and SC area were measured in each scan. We investigated the effects of baseline TM and SC microstructures on IOP reduction amount.The baseline IOP of 69 glaucomatous eyes was 17.9 ± 3.8 mmHg, and the mean amount of IOP reduction was 3.5 ± 2.1 mmHg after 1 year. Mean TM widths of nasal and temporal sector were 470.33 ± 80.05 and 479.74 ± 79.59 μm, respectively. SC area was measured as 4,818.50 ± 1,464.28, 4,604.23 ± 1,567.73 μm2 at nasal sector and temporal sector, respectively. The correlation analysis revealed a positive correlation between SC area and average amount of IOP reduction, indicating that the larger baseline SC area, the greater the IOP drop with topical IOP-lowering agents. However, no correlation was found between TM width and IOP lowering amount in patients with POAG.RESULTSThe baseline IOP of 69 glaucomatous eyes was 17.9 ± 3.8 mmHg, and the mean amount of IOP reduction was 3.5 ± 2.1 mmHg after 1 year. Mean TM widths of nasal and temporal sector were 470.33 ± 80.05 and 479.74 ± 79.59 μm, respectively. SC area was measured as 4,818.50 ± 1,464.28, 4,604.23 ± 1,567.73 μm2 at nasal sector and temporal sector, respectively. The correlation analysis revealed a positive correlation between SC area and average amount of IOP reduction, indicating that the larger baseline SC area, the greater the IOP drop with topical IOP-lowering agents. However, no correlation was found between TM width and IOP lowering amount in patients with POAG.The baseline SC area showed positive correlation with the IOP reduction amount in patients with POAG. This finding suggests that the SC area can be a clinical parameter to predict the IOP reduction amount before using IOP-lowering agents in POAG patient.CONCLUSIONSThe baseline SC area showed positive correlation with the IOP reduction amount in patients with POAG. This finding suggests that the SC area can be a clinical parameter to predict the IOP reduction amount before using IOP-lowering agents in POAG patient. Purpose: To evaluate the effects of baseline trabecular meshwork (TM) and Schlemm’s canal (SC) microstructures on intraocularpressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG). Methods: A total 69 eyes of POAG patients who had not been treated with IOP-lowering agent were enrolled in this retrospectivestudy. The patients had been prescribed topical IOP-lowering agent and used it for 1 year. The morphologic featuresof the TM and SC were collected using anterior segment module of spectral-domain optical coherence tomography withenhanced depth imaging at baseline. Images of the nasal and temporal corneoscleral limbus were obtained with serial horizontalenhanced depth imaging B-scans and TM width and SC area were measured in each scan. We investigated the effectsof baseline TM and SC microstructures on IOP reduction amount. Results: The baseline IOP of 69 glaucomatous eyes was 17.9 ± 3.8 mmHg, and the mean amount of IOP reduction was 3.5 ± 2.1mmHg after 1 year. Mean TM widths of nasal and temporal sector were 470.33 ± 80.05 and 479.74 ± 79.59 μm, respectively. SC area was measured as 4,818.50 ± 1,464.28, 4,604.23 ± 1,567.73 μm2 at nasal sector and temporal sector, respectively. The correlation analysis revealed a positive correlation between SC area and average amount of IOP reduction, indicatingthat the larger baseline SC area, the greater the IOP drop with topical IOP-lowering agents. However, no correlation wasfound between TM width and IOP lowering amount in patients with POAG. Conclusions: The baseline SC area showed positive correlation with the IOP reduction amount in patients with POAG. Thisfinding suggests that the SC area can be a clinical parameter to predict the IOP reduction amount before using IOP-loweringagents in POAG patient. KCI Citation Count: 0 Purpose: To evaluate the effects of baseline trabecular meshwork (TM) and Schlemm’s canal (SC) microstructures on intraocular pressure (IOP) reduction amount in treatment-naïve patients with primary open-angle glaucoma (POAG).Methods: A total 69 eyes of POAG patients who had not been treated with IOP-lowering agent were enrolled in this retrospective study. The patients had been prescribed topical IOP-lowering agent and used it for 1 year. The morphologic features of the TM and SC were collected using anterior segment module of spectral-domain optical coherence tomography with enhanced depth imaging at baseline. Images of the nasal and temporal corneoscleral limbus were obtained with serial horizontal enhanced depth imaging B-scans and TM width and SC area were measured in each scan. We investigated the effects of baseline TM and SC microstructures on IOP reduction amount.Results: The baseline IOP of 69 glaucomatous eyes was 17.9 ± 3.8 mmHg, and the mean amount of IOP reduction was 3.5 ± 2.1 mmHg after 1 year. Mean TM widths of nasal and temporal sector were 470.33 ± 80.05 and 479.74 ± 79.59 μm, respectively. SC area was measured as 4,818.50 ± 1,464.28, 4,604.23 ± 1,567.73 μm2 at nasal sector and temporal sector, respectively. The correlation analysis revealed a positive correlation between SC area and average amount of IOP reduction, indicating that the larger baseline SC area, the greater the IOP drop with topical IOP-lowering agents. However, no correlation was found between TM width and IOP lowering amount in patients with POAG.Conclusions: The baseline SC area showed positive correlation with the IOP reduction amount in patients with POAG. This finding suggests that the SC area can be a clinical parameter to predict the IOP reduction amount before using IOP-lowering agents in POAG patient. |
| Author | Yoo, Chungkwon Kim, Yong Yeon Chung, Hyun Woo Park, Ji-Hye |
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| CitedBy_id | crossref_primary_10_1080_08164622_2024_2400319 crossref_primary_10_2147_OPTH_S441805 crossref_primary_10_3390_jcm12175711 crossref_primary_10_2196_78864 crossref_primary_10_1007_s00417_021_05523_3 crossref_primary_10_1007_s00417_024_06397_x crossref_primary_10_1016_j_heliyon_2024_e34635 crossref_primary_10_1038_s41598_023_36329_4 crossref_primary_10_1038_s41598_024_56748_1 crossref_primary_10_26508_lsa_202201721 |
| Cites_doi | 10.1136/bjophthalmol-2018-312292 10.1371/journal.pone.0145824 10.1167/iovs.07-1139 10.1016/0002-9394(73)91145-8 10.1016/j.ajo.2015.06.002 10.1167/iovs.07-1477 10.1167/iovs.12-9776 10.1167/iovs.09-4559 10.1167/iovs.13-13264 10.1016/j.ajo.2020.02.005 10.1016/j.exer.2003.09.021 10.1016/j.ophtha.2012.10.008 10.1016/j.ajo.2017.08.018 10.1016/0014-4835(71)90149-7 10.1001/archopht.1996.01100130652003 10.1111/aos.13080 |
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| References | ref12 Carreon (ref3) 2017 ref14 ref11 ref10 Allingham (ref16) 1996 ref1 (ref2) 2000 ref17 Dorairaj (ref6) 2007 Brubaker (ref18) 1975 ref24 ref23 ref25 ref20 ref22 Bill (ref13) 1989 Johnstone (ref19) 1979 ref21 ref8 ref7 ref9 ref5 Allingham (ref15) 1992 Perlman (ref4) 2007 |
| References_xml | – ident: ref1 doi: 10.1136/bjophthalmol-2018-312292 – start-page: 31 volume-title: Relationships between 24h observations in intraocular pressure vs blood pressure, heart rate, nitric oxide and age in the medical chronobiology aging project year: 2007 ident: ref4 – ident: ref23 doi: 10.1371/journal.pone.0145824 – ident: ref5 doi: 10.1167/iovs.07-1139 – ident: ref17 doi: 10.1016/0002-9394(73)91145-8 – ident: ref24 doi: 10.1016/j.ajo.2015.06.002 – start-page: 429 volume-title: The Advanced Glaucoma Intervention Study (AGIS): 7. The relationship between control of intraocular pressure and visual field deterioration year: 2000 ident: ref2 – ident: ref7 doi: 10.1167/iovs.07-1477 – ident: ref25 doi: 10.1167/iovs.12-9776 – start-page: 99 volume-title: Quantitative evaluation of anterior segment parameters in the era of imaging year: 2007 ident: ref6 – ident: ref20 doi: 10.1167/iovs.09-4559 – start-page: 101 volume-title: Schlemm’s canal and primary open angle glaucoma: correlation between Schlemm’s canal dimensions and outflow facility year: 1996 ident: ref16 – ident: ref8 doi: 10.1167/iovs.13-13264 – ident: ref11 doi: 10.1016/j.ajo.2020.02.005 – start-page: 44 volume-title: Pressure-dependent changes in nuclei and the process origins of the endothelial cells lining Schlemm’s canal year: 1979 ident: ref19 – ident: ref12 doi: 10.1016/j.exer.2003.09.021 – ident: ref9 doi: 10.1016/j.ophtha.2012.10.008 – ident: ref10 doi: 10.1016/j.ajo.2017.08.018 – ident: ref14 doi: 10.1016/0014-4835(71)90149-7 – start-page: 1661 volume-title: The relationship between pore density and outflow facility in human eyes year: 1992 ident: ref15 – start-page: 286 volume-title: The effect of intraocular pressure on conventional outflow resistance in the enucleated human eye year: 1975 ident: ref18 – start-page: 108 volume-title: Aqueous outflow: a continuum from trabecular meshwork to episcleral veins year: 2017 ident: ref3 – start-page: 417 volume-title: Uveoscleral drainage of aqueous humor: physiology and pharmacology year: 1989 ident: ref13 – ident: ref22 doi: 10.1001/archopht.1996.01100130652003 – ident: ref21 doi: 10.1111/aos.13080 |
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| Title | Effects of Trabecular Meshwork Width and Schlemm’s Canal Area on Intraocular Pressure Reduction in Glaucoma Patients |
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