Handheld Magnetic Rebound Tonometer

TonoVet®

A Breakthrough

Handheld Magnetic Rebound Tonometer

for Measuring Intraocular Pressure

Six measurements are made with a short beep after each one. After six measurements are made, the TonoVet will calculate and display the reading.

GLAUCOMA

Glaucoma is caused by elevated intraocular pressure, due to an imbalance of production and drainage of the clear fluid (aqueous humor) within the eye.

PRIMARY GLAUCOMA occurs without previous trauma or ocular disease and can be bilateral. It is known to occur in certain breeds and a significant percentage of primary glaucoma is considered to be hereditary.

SECONDARY GLAUCOMA occurs as a consequence of some other disease such as ocular inflammation, lens dislocation, intraocular tumors or trauma.

VETERINARY SPECIFIC

Calibrated for dogs, cats and horses. Calibration was done using pressurized dog eyes, without enucleation. The eyes were cannulated and pressurized with a water column and pressurizing was controlled with a pressure sensor. The same was done on the cat. The horse was calibrated the same way only enucleated horse eyes were used.

TECHNOLOGY

The highly accurate, patented technology detects the motion of the probe as the probe contacts the eye and bounces back.

The motion parameters of the probe vary according to eye pressure and are used to calculate IOP.

ACCURACY

Excellent correlation with manometrically determined true IOP. Designed to take and calculate the average of six measurements. Each measurement is taken in a fraction of a second, thus reducing the influence of factors outside the animal’s eye. The consistency involved with the automatic motion of the TonoVet probe, helps to eliminate technique errors. If an error does take place due to poor technique, the user is notified by an alarm and the procedure can be repeated.

LOCAL ANESTHESIA

Topical anesthesia is not necessary as the probe touch is so light as not to cause any discomfort to the patient. Local anesthesia can be applied at the discretion of the veterinary practitioner but it may alter the reading slightly.

CALIBRATION

The on-board software checks all parameters and is self-calibrating.

Ease-of-Use

Predisposition to Glaucoma

CANINE

Afghan, Akita, Alaskan Malamute, Basset Hound, Beagle, Border Collie, Boston Terrier, Bouvier Des Flandres, Carin Terrier, Cardigan Welsh Corgi, Chihuahua, Chow, Cocker Spaniel, Dachshund, Dalmatian, Dinmont Terrier, English Springer Spaniel, Giant Schnauzer, Great Dane, Maltese, Manchester Terrier, Miniature Pinscher, Norfolk Terrier, Norwegian Elkhound, Norwich Terrier, Pembroke Welsh Corgi, Poodle, Saluki, Samoyed, Scottish Terrier, Sealyham Terrier, Shih Tzu, Siberian Husky, Smooth-Coated Fox Terrier, Tibetan Terrier, Welsh Spaniel, Welsh Terrier, West Highland White Terrier, Whippet, Wire-haired Fox Terrier

FELINE

Persians, Siamese, some Domestic Short-hairs

Measuring the Intraocular Pressure

Secure the animal. Sedation may be required for fractious animals.

The use of local anesthesia is optional. Local anesthesia may reduce the reading by 1-2 mm Hg.

The probe should be on a horizontal plane at a distance of about 4-8mm from the cornea.

Press the measurement button to activate the probe to gently hit the center of the cornea.

High IOP Measurements

>25 mm Hg in dogs

>31 mm Hg in cats

The rate of vision loss is proportional to the degree of IOP elevation; with complete blindness resulting in days with marked increases in IOP, and over weeks to months for mild increases.1 If the cornea is damaged, even though the force applied from the TonoVet is slight, it is always best to refer the case to a veterinary ophthalmologist specialist.

Reasons to Test for Intraocular Pressure

1) It is considered good medicine and marketing of professional services.

2) Pets are viewed by clients as family members and clients expect preventive health care.

3) To establish an IOP baseline that is specific to individual animal patients.

4) If there is a history of glaucoma in the bloodline, IOP should be monitored on a frequent basis.

5) IOP should be measured on the 42 breeds that are predisposed and/or any cross breeds.

6) For use as preventive medicine tool for all geriatric wellness exams beginning at age 6-7.

7) For use as a diagnostic tool for all cases of “red eye,” head trauma and eye trauma.

Glaucoma is a vision impairing disorder due to high intraocular pressure. The pressure that is exerted on the optic nerve and retina is one of the main causes of blindness in dogs. Frequently it is clinically diagnosed late in the course of the disease and the animal is normally either blind at this point or close to blind. Their quality of life is poor and they are often in severe pain.

Clinical Symptoms

Early symptoms may consist of mild inflammation of the fine tissue that lines the inner surface of the eyelids and clinically mimic conjunctivitis. Late symptoms, associated with advanced glaucoma, consist of “red eye” and enlargement of the eye. By this time the patient has experienced increased pain, tearing and permanent loss of sight. That is why early detection is vital.

IOP should be measured on the 42 breeds of dogs predisposed to glaucoma, and mixes of these breeds, on an annual basis and more frequently if a history of glaucoma has been established in the bloodline.

Warranty: See the product registration card for details on the manufacturer’s two year limited warranty.

Complete the warranty card and FAX to Tiolat Oy within 90 days of purchase

FAX to 011-358-9-728-6670

Miller PE: Glaucoma. In Bonagura JD (ed): Kirk’s Current Veterinary Therapy XII Small Animal Practice. W.B. Saunders Co, Philadelphia, 1995, pp1265-1272.