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Abstract #8158 Published in IGR 4-3
Comparison of precision of the TonoPenXL with the Goldmann and Draeger applanation tonometer in a sitting and recumbent position of the patients: a clinical study on 251 eyes
Viestenz A; Lausen B; Jünemann AM; Mardin CYKlinische Monatsblätter für Augenheilkunde 2002; 219: 785-790
PURPOSE: Comparison of precise intraocular pressure (IOP) measurements with the TonoPenXL, Goldmann and Draeger applanation tonometers in a sitting and a recumbent position. MATERIAL AND METHODS: The IOP of 251 eyes of 127 consecutive patients (SFB 539) was measured prospectively in a sitting (1 x Goldmann, 3 x TonoPenXL) and a recumbent (1 x Draeger, 3 x TonoPen) position. The mean of the three TonoPenXL measurements was only accepted at a 5% interval. Additionally, corneal ultrasonic pachymetry (Tomey, AL-2000), central corneal power, refractive error, gender, and age were registered. RESULTS: In 92%, IOP measured with the TonoPenXL was in a 2 mmHg range of the Goldmann standard. In a vertical position, TonoPenXL IOP (16.7 ± 4.5 mmHg) was 0.2 mmHg lower than Goldmann IOP (16.9 ± 5.1 mmHg; regression ANALYSIS: TonoPenXL IOP = 1.78 + 0.88 Goldmann IOP). In a horizontal position, TonoPenXL IOP (17.5 ± 5.0 mmHg) was 0.5 mmHg higher than Draeger IOP (17.0 ± 5.3 mmHg; regression ANALYSIS: TonoPen IOP = 0.34 + 1.016 Draeger IOP). Using the TonoPenXL, IOP was 0.8 mmHg higher in a recumbent than in a sitting position (regression ANALYSIS: TonoPen IOP recumbent position = -2.27 + 1.19 TonoPen IOP sitting position). No relationship was found between central corneal power, central corneal thickness, and IOD measured with the TonoPenXL. CONCLUSIONS: The TonoPenXL is useful for IOP measurement in the sitting and the recumbent position. Results are reproducible in 92% with the Goldmann-applanation tonometer. This is a useful measurement and screening tool for the ophthalmologist for use in consultations or in the investigation of IOP under general anesthesia. LA: German
A. Viestenz, MD, Augenklinik mit Poliklinik, Universität Erlangen-Nürnberg, Erlangen, Germany
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
