Comparison and comparability of pneumotonometry and rebound tonometry results with Maklakov’s applanation tonometry
- Authors: Belov D.F.1,2, Zumbulidze N.G.3, Yusupova A.I.3, Kasymov F.O.1,3
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Affiliations:
- St. Petersburg Multifield Hospital No. 2
- Saint Petersburg State University
- North-Western State Medical University named after I.I. Mechnikov
- Issue: Vol 16, No 1 (2023)
- Pages: 39-46
- Section: Original researches
- URL: https://journals.rcsi.science/ov/article/view/144102
- DOI: https://doi.org/10.17816/OV321245
- ID: 144102
Cite item
Abstract
BACKGROUND: Introduction and use of various tonometry methods can lead to misinterpretation of intraocular pressure results and influence the choice of treating approaches by ophthalmologist in a glaucoma patient.
AIM: To compare pneumotonometry and rebound tonometry results with Maklakov’s applanation tonometry and to develop corrections for their comparability.
MATERIALS AND METHODS: The study included 75 patients. All subjects underwent Maklakov applanation tonometry (10 g) and pachymetry (Topcon SP-3000P). In 48 patients (94 eyes) of the 1st group, pneumotonometry (TONOREF™ II Nidek) was performed, and 27 patients of the 2nd group (52 eyes) underwent rebound tonometry (iCare™ IC-100).
RESULTS: The mean difference in intraocular pressure level in the 1st group was –4.81 (p < 0.001), and in the 2nd –0.98 mmHg (p = 0.399). Both methods — pneumo- and rebound tonometry showed underestimated results with intraocular pressure less than 23.0 and 22.5 mmHg (respectively) relative to applanation tonometry and, conversely, overestimated intraocular pressure when these values were exceeded. A significant (p < 0.001) strong (R2 = 0.86) relationship between applanation and rebound tonometry was obtained, which made it possible, using regression analysis, to develop a formula for recalculating results of iCare tonometry into those of Maklakov tonometry: PMaklakov = 0.40 × PiCare + 13.44.
CONCLUSIONS: Both pneumo- and rebound tonometry demonstrate adequate results of P0 with intraocular pressure below 23.0 and 22.5 mmHg (respectively) and overestimate the results when these values are exceeded. The developed formula allows converting the results of iCare tonometry into the values of the Maklakov’s tonometry.
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##article.viewOnOriginalSite##About the authors
Dmitrii F. Belov
St. Petersburg Multifield Hospital No. 2; Saint Petersburg State University
Author for correspondence.
Email: belovd1990@gmail.com
ORCID iD: 0000-0003-0776-4065
SPIN-code: 2380-2273
MD, Cand. Sci. (Med.), ophthalmologist
Russian Federation, Saint Petersburg; Saint PetersburgNatalia G. Zumbulidze
North-Western State Medical University named after I.I. Mechnikov
Email: guramovna@gmail.com
ORCID iD: 0000-0002-7729-097X
SPIN-code: 4439-8855
MD, Cand. Sci. (Med.), assistant professor
Russian Federation, Saint PetersburgAmina I. Yusupova
North-Western State Medical University named after I.I. Mechnikov
Email: aminausupova4821@gmail.com
ORCID iD: 0009-0004-5562-204X
SPIN-code: 7522-8060
resident doctor
Russian Federation, Saint PetersburgFarhod O. Kasymov
St. Petersburg Multifield Hospital No. 2; North-Western State Medical University named after I.I. Mechnikov
Email: farkkas@yahoo.com
ORCID iD: 0009-0004-4368-143X
SPIN-code: 7778-6309
MD, Cand. Sci. (Med.), ophthalmologist
Russian Federation, Saint Petersburg; Saint PetersburgReferences
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