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Related Concept Videos

Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.

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Agreement between two Goldmann type applanation tonometers.

Ronnie George1, Hemamalini Arvind, M Baskaran

  • 1Glaucoma Services, Medical and Vision Research Foundation, Sankara Nethralaya, Chennai, India. chennaigs@rediffmail.com

Indian Journal of Ophthalmology
|November 1, 2008
PubMed
Summary
This summary is machine-generated.

This study found significant differences in intraocular pressure (IOP) measurements between two Goldmann applanation tonometers. Clinicians should be aware of this inter-instrument variability when measuring IOP.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Clinical Measurement

Background:

  • Intraocular pressure (IOP) is a critical factor in glaucoma management.
  • Accurate IOP measurement is essential for diagnosis and monitoring.
  • Applanation tonometry is a standard method for IOP assessment.

Purpose of the Study:

  • To evaluate the agreement between two commercial Goldmann applanation tonometers.
  • To quantify inter-instrument variability in intraocular pressure (IOP) measurements.

Main Methods:

  • Forty subjects participated in the study.
  • Intraocular pressure was measured using two calibrated Goldmann applanation tonometers: Zeiss AT 030 (GATZ) and Inami L-5110 (GATI).
  • Agreement was assessed using the Altman and Bland plot, with randomized examination order and masked observers.

Main Results:

  • Mean IOP readings differed significantly between GATZ (15.32 ± 6.80 mm Hg) and GATI (13.52 ± 5.65 mm Hg) (p < 0.001).
  • The 95% limits of agreement ranged from -2.47 to 6.16 mm Hg.
  • Significant inter-instrument variability was observed between the two tonometers.

Conclusions:

  • There is significant variability between the Zeiss AT 030 and Inami L-5110 Goldmann applanation tonometers.
  • Clinicians should consider potential discrepancies when interpreting IOP measurements from different devices.
  • Further research may be needed to standardize IOP measurement across devices.