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Updated: Oct 12, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
A comparison of the Cavitron Biotronics tonometer to the Goldmann tonometer
Abstract:
The Cavitron Biotronics tonometer operates on a principle similar to the Mackay-Marg tonometer by applanating the cornea with a probe and a 1.5 mm plunger. Measurements made with the Mackay-Marg tonometer have been shown to correlate with measurements made by other tonometers, but there are no reports of the validity or reliability of the Cavitron Biotronics tonometer. In this study, comparisons were made between intraocular pressure measurements obtained with the Cavitron Biotronics tonometer and the Goldmann tonometer. In addition, the test-retest reliability of the Cavitron Biotronics tonometer was examined.
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Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Assessment of blood pressure in brachial artery(two-step method)
Special considerations while measuring blood pressure
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.

