ĐÁNH GIÁ KẾT QUẢ ĐO NHÃN ÁP BẰNG VỚI MỘT SỐ LOẠI NHÃN ÁP KẾ

Abstract

Purpose: To analyze IOP readings with Maclakov tonometer, Goldmann applanation tonometer (GAT) and non-contact airpuff tonometer. Subjects and methods: A cross sectional study over 702 eyes of 352 patients treated at Glaucoma Deparment, Vietnam National institute of Ophthamology (VNIO) from November 2017 to August 2018. Results: The mean age of studied group was 56,06 ± 16,88 year old (range, 15 to 90). Subgroup of 60 to 80 year old was most popular accounting for 42,3 %. Female patients were 55,4%. Glaucoma patients were at highest rate (42,5%). With all 3 tonometers, Glaucoma group had highest mean IOP while retinal detachment group had lowest. With Maclakov tonometer group with IOP from 16 to 21 mmHg accounted most (74,1%), while very high (IOP≥ 32 mmHg) group accounted least (2,6%). The IOP reading difference between Maclakov and Goldmann tonometers depended on IOP intervals: Lower IOP < 16 mmHg: 2,397 ± 1,248 mmHg; Normal IOP (16 - 21 mmHg): 2,604 ± 1,563 mmHg; higher IOP (22 - 25mmHg): 1,100 ± 3,460 mmHg; high IOP (26 – 31 mmHg): -2,043 ± 3,989 mmHg; Very high IOP ≥ 32 mmHg: -3,611 ± 4,667 mmHg. Similary, the IOP reading difference between Maclakov and noncontact airpuff tonometers depended on IOP intervals: Lower IOP < 16 mmHg: 3,687 ± 2,741 mmHg; normal IOP: 16 - 21 mmHg: 2,270 ± 3,070 mmHg; higher IOP: 22 - 25mmHg: -0,536 ± 4,960 mmHg; high IOP: 26 – 31 mmHg: -3,207 ± 5,932 mmHg; very high IOP ≥ 32 mmHg: -3,883 ± 4,913mmHg. Conclusions: IOP results were different from different disease groups. IOP readings from different tonometers could be different and the magnitude, way of difference may depend on the IOP intervals.