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Trabecular Meshwork Motion Profile from Pulsatile Pressure Transients: A New Platform to Simulate Transitory Responses in Humans and Nonhuman Primates

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机构: [1]Beijing Institution of Ophthalmology, Beijing Tongren Hospital, Capital Medical University,Beijing 100730, China [2]Laboratory for Biomechanics and Mechanobiolog, Ministry of Education, Beihang University,Beijing 100191, China [3]Advanced Innovation Center for Biomedical Engineering, School of Biological Science and MedicalEngineering, School of Engineering Medicine, Beihang University, Beijing 100191, China [4]Department of Bioengineering, University of Washington, Seattle, WA 98195, USA [5]Department of Ophthalmology, University of Washington, Seattle, WA 53705, USA
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关键词: phase-sensitive optical coherence tomography trabecular meshwork biomechanical property glaucoma

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Featured Application The newly developed platform permits the study of the trabecular meshwork motion profile induced by ocular transients. Trabecular meshwork motion is an important profile for aqueous circulation in the eye. Its abnormality is the cause of primary open angle glaucoma, which is the leading cause of irreversible blindness in the world. Our research platform permitted a phase-sensitive optical coherence tomography system to quantitate TM motion responses to experimentally controlled pulse transients. Trabecular meshwork (TM) motion abnormality is the leading cause of glaucoma. With technique limitations, how TM moves is still an enigma. This study describes a new laboratory platform to investigate TM motion responses to ocular transients in ex vivo eyes. The anterior segments of human cadaver and primate eyes were mounted in a perfusion system fitting. Perfusion needles were placed to establish mean baseline pressure. A perfusion pump was connected to the posterior chamber and generated an immediate transient pressure elevation. A phase-sensitive optical coherent tomography system imaged and quantified the TM motion. The peak-to-peak TM displacements (ppTMD) were determined, a tissue relaxation curve derived, and a time constant obtained. This study showed that the ppTMD increased with a rise in the pulse amplitude. The ppTMD was highest for the lowest mean pressure of 16 mmHg and decreased with mean pressure increase. The pulse frequency did not significantly change ppTMD. With a fixed pulse amplitude, an increase in mean pressure significantly reduced the time constant of recoil from maximum distension. Our research platform permitted quantitation of TM motion responses to designed pulse transients. Our findings may improve the interpretation of new TM motion measurements in clinic, aiding in understanding mechanisms and management.

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出版当年[2021]版:
大类 | 4 区 工程技术
小类 | 4 区 化学综合 4 区 工程:综合 4 区 材料科学:综合 4 区 物理:应用
最新[2023]版:
大类 | 4 区 综合性期刊
小类 | 3 区 化学:综合 4 区 工程:综合 4 区 材料科学:综合 4 区 物理:应用
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出版当年[2020]版:
Q2 PHYSICS, APPLIED Q2 ENGINEERING, MULTIDISCIPLINARY Q3 CHEMISTRY, MULTIDISCIPLINARY Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
最新[2023]版:
Q1 ENGINEERING, MULTIDISCIPLINARY Q2 CHEMISTRY, MULTIDISCIPLINARY Q2 PHYSICS, APPLIED Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

影响因子: 最新[2023版] 最新五年平均 出版当年[2020版] 出版当年五年平均 出版前一年[2019版] 出版后一年[2021版]

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第一作者机构: [1]Beijing Institution of Ophthalmology, Beijing Tongren Hospital, Capital Medical University,Beijing 100730, China
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