Keeler KAT Instructions For Use Manual
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Keeler KAT Instructions For Use Manual

Applanation tonometer
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Keeler Applanation Tonometer (KAT)
Instructions for use
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Summary of Contents for Keeler KAT

  • Page 1 Keeler Applanation Tonometer (KAT) Instructions for use Home Back Next...

  • Page 2: Table Of Contents

    Disinfecting the Tonometer prisms 11.3 Check procedure with the calibration arm set to 6 Tonometer Prism field check 12. Servicing and calibration Name of components of R type and T type KAT 13. Specifications Measurement procedure 13.1 Transport, storage and working conditions Installation on to the Slit Lamp 13.2 Technical specifications...

  • Page 3: Introduction

    Tonometer head and then placed against the cornea. The KAT should be used only by trained personnel. USA Federal The examiner, using a slit lamp biomicroscope at 10x law restricts this device to sale by or order of a physician.

  • Page 4: How The Intraocular Pressure Is Measured

    1. Introduction 1.3 How the intraocular pressure is measured 1.4 Advantages of using a Goldmann Type Tonometer The cornea is flattened by an acrylic measuring prism on a • Intraocular pressure can be measured during routine ring support at the end of the Tonometer sensor arm assembly. examination with the Slit Lamp.

  • Page 5: Symbols Used

    2. Symbols used Read user instructions for Warnings, Cautions and additional information The CE mark on this product indicates it has been 0088 tested to and conforms with the provisions noted within the 93/42/EEC Medical Device Directive Consult instructions for use Manufacturers name and address Keep dry Fragile...

  • Page 6: Safety

    Use this instrument only in strict accordance with the instructions contained in this manual. 3.1 Standards applied The Keeler Applanation Tonometer is designated as Class I non-invasive measuring device under EC Directive 93/42/EEC for medical equipment products. The CE mark on this product indicates it has been tested to and conforms to the provisions noted within the 93/42/EEC Medical Device Directive.

  • Page 7: Warnings And Cautions

    • Keeler Applanation Tonometers should be serviced and calibrated annually. Any servicing or repairs/modifications • The owner of the instrument is responsible for training should only be carried out by Keeler Ltd. or by suitably personnel in its correct use. trained and authorised distributors. The manufacturer declines •...

  • Page 8: Cleaning And Disinfection Instruction

    4. Cleaning and disinfection instruction 4.1 Cleaning Tonometer body • Only manual non-immersion cleaning as described should be used for this instrument. • Wipe the external surface with a clean absorbent, non-shedding cloth dampened with a water / detergent solution (2% detergent by volume) or water / isopropyl alcohol solution (70% IPA by volume).

  • Page 9: Disinfecting The Tonometer Prisms

    4. Cleaning and disinfection instruction 4.2 Disinfecting the Tonometer prisms Rinse the disinfectant from the prism in running water Always disinfect the Tonometer prisms before use. Hand hygiene 10-30 mins for between 10 and 30 must be considered to prevent any contamination. minutes.

  • Page 10: Tonometer Prism Field Check

    5. Tonometer Prism field check Check Tonometer prism under Slit lamp and ensure there is no cracks/chips. Chemical used in diagnosis process (for example: Fluorescein) will get into the cracks and will show up if observed under slit lamp. Do not use it if there is any sign of crack or chip. Home Back Next...

  • Page 11: Name Of Components Of R Type And T Type Kat

    6. Name of components of R type and T type KAT 1. Control weight housing 2. Rotating measurement knob 3. Doubling prism 4. Measurement arm 5. Manufacturers data 6. T type mounting assembly 7. R type mounting assembly 8. Calibration arm assembly...

  • Page 12: Measurement Procedure

    7.1 Installation on to the Slit Lamp Before installing the Tonometer on a Slit Lamp ensure that they are mutually suitable. 7.1.1 Keeler Applanation Tonometer (T type) • Position the guide plate in the Tonometer/test bar support hole Guide Plate on the slit lamp.

  • Page 13: Applanation Tonometer 'Keeler Fixed' (R Type)

    7. Measurement procedure 7.1.2 Applanation Tonometer ‘Keeler Fixed’ (R type) This instrument is for those who wish the Tonometer to remain permanently on the slit lamp. • Mount the plate for the Tonometer onto the microscope body using the securing screw.

  • Page 14: Preparing The Patient

    7. Measurement procedure 7.2 Preparing the patient • Use an appropriate topical anaesthetic to numb the cornea. • Place a strip of fluorescein-soaked paper near the outer canthus in the lower conjunctival sac. After a few seconds the lacrimal fluid will be colored and the paper may be removed. When using drops, we recommend a 0.5% solution of fluorescein sodium.

  • Page 15: Preparing The Slit Lamp Instrument For Examinations At 10 X Magnification

    7. Measurement procedure 7.3 Preparing the Slit Lamp instrument for • Place the doubling prism on into the holder and align the examinations at 10 x magnification ‘zero mark’ with the white alignment line on the prism • Before beginning measurement, check that the eyepieces of holder, this ensures the mires have a horizontal split.

  • Page 16: Using The Instrument/ Taking A Measurement

    7. Measurement procedure 7.4 Using the instrument/ taking a measurement 7.4.1 Instructions to the patient • The patient’s head must be firmly positioned on the chin rest and the forehead rest. If necessary, a band may be used to hold the head still. •...

  • Page 17: Taking The Measurement

    7. Measurement procedure 7.4.2 Taking the measurement • Increase applanation pressure by rotating the Tonometer measurement drum until the margins of the fluorescein rings • Move the slit lamp forward to bring the measuring touch and the cross as the eye pulses (Figure 2). The width of prism into contact with the centre of the cornea in the area the fluorescein rings around the contact position of the above the pupil.

  • Page 18: Problem Solving

    8. Problem solving 1. The fluorescein ring is too wide or too narrow Cause: Cause: The fluorescein semi-circles are too wide. The fluorescein semi-circles are too narrow. The measuring prism was not dried after The lacrimal fluid has dried during prolonged cleaning, or the eyelids came into contact measurement.
  • Page 19 8. Problem solving 2. The measurement prism does not touch the cornea or too much force has been applied Cause: Cause: If the patient pulls his/her head back even If during measurement the slit lamp is moved slightly, the pulses will become irregular and forward toward the patient or the patient moves measuring prism contact with the eye will toward the slit lamp, the sensor arm will be pushed...
  • Page 20 8. Problem solving 3. The two semicircles are not central in the field of vision Cause: The reading in this position is considerably higher than real ocular pressure. Correction: Correction: Using the slit lamp height adjustment Using the joystick, move the slit lamp up and mechanism, lower the slit lamp until the two to the left.
  • Page 21 8. Problem solving 4. The inside margins of the fluorescein rings are not aligned and touching Cause: Cause: The semi-circular images are well centred. Excessive pressure has been applied. The outer margins are aligned but the inner Correction: margins are not. Reduce pressure until the semicircular images Correction: come closer together and finally the inner...

  • Page 22: General Information And Suggestions Concerning Measurement

    9. General information and suggestions concerning measurement IMPORTANT NOTE When the measurement procedure for one eye is prolonged excessively, drying phenomena will occur on the corneal epithelium Measurement must be performed as quickly as possible on each of both eyes. eye.

  • Page 23: Astigmatism

    10. Astigmatism 43° marker If the cornea is spherical, measurements may be made along any meridian, but it is usual to measure along the horizontal 0° meridian. This is not the case when measurements are made on eyes affected by corneal astigmatism of greater than 3 dioptres, 0°...

  • Page 24: Routine Instrument Maintenance

    In the event of the device being outside of the calibration tolerances, it is important to send the device back to Keeler Ltd. Windsor for repair and re calibration. 11.1 Check procedure with the measurement drum...

  • Page 25: Check Procedure With Measurement Drum Set To

    11. Routine Instrument Maintenance 11.2 Check procedure with measurement drum set to 2 P a t i e This is the most important check procedure, since measurement of intraocular pressure in this area is highly significant. We recommend running this check daily. i n e r E x a m This check is made using the calibration arm (Figure 5).
  • Page 26 11. Routine Instrument Maintenance 11.2 Check procedure with measurement drum set to 2 contd. When the drum position is 1.95 and/or 2.05, the sensor arm should move from the free movement area to the corresponding stop. Calibration Position 1.95: Rotate the measurement drum 2 calibration downward by the width Figure 6 of one calibration mark (see Figure 6).

  • Page 27: Check Procedure With The Calibration Arm Set To

    11. Routine Instrument Maintenance 11.3 Check procedure with the calibration arm set to 6 The Tonometer check procedure with a scale 6 calibration is very similar to those described above. The checkpoints are 5.9 and/or 6.1. Rotate the “6” calibration mark on the drum through ½ interval downward and/or upward, respectively, with respect to the index mark.

  • Page 28: Servicing And Calibration

    Keeler recommends annual calibration of the instrument. This must be performed by an authorised service centre or distributor. There are no user serviceable parts in this instrument. Service manuals will be available to authorised Keeler service centres and Keeler trained service personnel. Home Back Next...

  • Page 29: Specifications

    13. Specifications 13.1 Transport, storage and working conditions The following ambient condition limits are recommended for the Keeler Applanation Tonometer, for transport and storage it is recommended that the Tonometer is kept in it’s original manufacturers packaging. Before use the Tonometer should be allowed to adjust to the ambient room temperature for several hours.

  • Page 30: Technical Specifications

    Keeler T type: for Haag Streit type Fitted to the guide plate on the optical axis for the illumination systems microscope and illumination unit arm Keeler R type: for some Zeiss type and Mountable on post on microscope Haag Streit type illumination systems Installation...

  • Page 31: Accessories And Warranty

    14. Accessories and warranty 14.1 Accessories Tonometer doubling prism Part Number 2414-P-5001 Calibration arm assembly Part Number 2414-P-5005 T type guide plate Part Number 2414-P-5032 R type post Part Number 2414-P-5042 Tonometer doubling prism Calibration arm assembly Luxury carrying case Part Number 3414-P-7000 14.2 Product warranty 2 years against faulty workmanship, Materials and labour.

  • Page 32: Contact Information

    15. Contact information Manufacturer USA Sales Office Keeler Limited Keeler Instruments Inc Clewer Hill Road 3222 Phoenixville Pike Windsor Building #50 Berkshire SL4 4AA Malvern, PA 19355 Freephone: 0800 521251 Toll Free: 1 800 523 5620 Tel: +44 (0) 1753 857177...

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