Instruction manual

5
SECTION 1
Introduction
1.1 Overview
 is manual describes components, setup, procedures, and
operation of the Medtronic Tono-Pen XL Tonometer.  e
Medtronic Tono-Pen XL is a precision electronic tonometer
which measures intraocular pressure (IOP).  e body of
the instrument is specially designed to fi t comfortably in
the user’s hand, facilitating fast and accurate measurements.
 e stainless steel probe on the Tono-Pen XL contains a
solid state strain gauge which converts intraocular pressure
(IOP) to an electrical signal.  e probe tip must be covered
by a protective membrane. Medtronic Ocu-Film
®
Tip Cov-
ers are recommended. Utilizing a sophisticated “single chip”
microprocessor and electronics housed in the body of the
instrument, the waveform produced by each touch to the
anesthetized corneal surface is analyzed and stored for a
statistical comparison process. Each single valid IOP read-
ing is digitally displayed on the liquid crystal display (LCD).
When four valid readings are obtained, the mean IOP and
the standard deviation for those readings (an indication of
reliability) are shown on the LCD.
1.2 Intended Use
 e Tono-Pen XL is intended for measuring IOP as a screen-
ing/monitoring tool for Glaucoma or when increased IOP
is suspected.