Abstract

PINEDA-ZAPATA, Uriel  and  DAZA-FERNANDEZ, Juan Fernando. Design and validation of a prototype to calibrate the pressure variable in tonometry. Dyna rev.fac.nac.minas [online]. 2021, vol.88, n.218, pp.185-193.  Epub Mar 28, 2022. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v88n218.91715.

This paper corresponds to the results of an experimental research that to led to the design of a useful prototype for quality control of measurements in the field of tonometry to diagnose and check glaucoma. All tonometry techniques are based on Goldmann´s tonometers (GT) and the Imbert-Fick principle. Taking into account the principles and techniques of industrial metrology, the prototype could be used as a standard to calibrate the pressure readings of this class of tonometers. The developed protoype eliminates the indirect measurement that is required with current standards and facilitates a greater control of the sources of error in the measurement. The model is based on the integration of a sensor to a hydraulic model to measure pressures from 0 to 80 mmHg range, whose precision was validated through R&R studies. The precision of the prototype was validated according to the Rigel UNI-SIM standard and was complemented by calibrating 15 tonometers.

Keywords : tonometry; metrology; uncertainty in measurement; calibration.

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