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A. Barreira, G. Vasconcelos Moraes, A. Reis, R. Vessani, M. Sano, M. Hatanaka, R. Susanna, Jr.; Intraocular Pressure and Ocular Pulse Amplitude Profile During the Modified Diurnal Tension Curve Using Dynamic Contour Tonometry. Invest. Ophthalmol. Vis. Sci. 2008;49(13):1056.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the IOP and OPA profile during the Modified Diurnal Tension Curve (mDTC) using DCT.
Prospective study involving forty primary open angle glaucomatous eyes. All subjects were under topical treatment. The selected patients were submitted to the (mDTC) using DCT (SMT Swiss Microtechnology AG, Zurich, Switzerland). The measurements were performed at 8 am, 10 am, 2 pm and 4 pm. IOP and OPA were recorded and analyzed. Statistical analysis was performed using paired student t-test.
Female and Caucasians represented 75% and 60% respectively. The average age was 54 years (range 38-71). The mean IOP values during mDTC were 19.68 (±4.68); 17.63 (±4.44); 17.25 (±5.41) and 17.32 (±4.25) mmHg, and the APO values were 2.82 (±1.49); 2.98 (±1.6); 2.96 (±1.5); 3.11 (±1.81), respectively.
The DCT IOP measurements were higher during the morning, which is consistent with other tonometers in previous studies. There was an inverse correlation between IOP and APO during mDTC, which showed higher IOP values and lower APO values in the morning. The study demonstrates a low blood flow/ IOP ratio in the morning compared to other day measurements, which might result in perfusion stress in the optic nerve head.
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