Measuring your cat’s blood pressure: why and how

Posted on December 12, 2021 by felinepurrspective_u3q4o6

HDO BP cat — A cat relaxes in his basket during a blood pressure reading at home using an HDO unit. The cuff is on his tail. The blood pressure wave is on the computer screen.

You’ve brought your senior cat in for her regular checkup and the technician asks you if you would like to have her blood pressure checked. Although your blood pressure is routinely checked when you go to the doctor, it has not occurred to you to ask to have your cat’s blood pressure checked. Should you have your cat’s blood pressure measured? How is it done – will it be uncomfortable? Frightening?

Why measure your cat’s blood pressure

As cats age, many develop hyperthyroidism and kidney disease. Other cats may develop diabetes. All of these conditions can result in the heart pumping harder to compensate for the changes. As the heart pumps harder, blood pressure increases and arteries, the eyes, the kidneys, the brain and heart can be damaged.

Left untreated, high blood pressure can result in:

blindness
increasing loss of protein through the kidneys >> shortened life span
disorientation, lack of balance, seizures, altered mentation or behavior, or weakness in the limbs

The best way to avoid these consequences is to monitor your cat’s blood pressure and start treatment if his blood pressure is high.

So how do we measure your cat’s blood pressure?

When measuring blood pressure in humans, we typically place a pressure cuff on the upper arm, inflate the cuff until the flow of blood to the artery is shut off . The cuff is then released, and a wave of blood fills the artery, turbulent at first, then subsiding to a smooth flow.

The human practitioner can use a stethoscope to listen to the sounds made as the blood rushes back into the artery.

The first sound is heard at the systolic blood pressure (the higher number in 120/80)
The final sound is heard at the diastolic pressure (the lower number in 120/80).

We will also use a blood pressure cuff to measure your cat’s blood pressure. This cuff can be put:

on the front leg
on the hind limb, above or below the hock (ankle)
on the tail

Cats’ arteries are much smaller than humans’ and it is difficult to hear the sounds of the blood flow using a stethoscope, so we turn to other methods: Doppler and oscillometric.

Doppler

A Doppler unit measures blood flow.

After placing the cuff on your cat, the Doppler sensor is placed over the target artery.
Piezoelectric crystals in the sensor detect changes in the flow of blood in the arteries and convert these to sound.
Acoustic gel on the sensor ensures good contact so that the practitioner can hear the heartbeat.
The cuff is inflated until the heartbeat is no longer heard.
The cuff is then released and the pressure at which the heartbeat can be heard again is the systolic blood pressure.
Headphones are usually used when measuring blood pressure with a Doppler.

Doppler units give us a measurement of the systolic blood pressure, the larger number in the 120/80.

Oscillometric

Only a cuff needs to be placed to measure your cat’s blood pressure with an oscillometric unit.

A sensor in the cuff detects the pressure pulses in the artery.
As the cuff is inflated, the pulses decrease as flow to the artery is cut off.
The cuff is then deflated and the pressure wave that results as the blood rushes back into the artery is analyzed.

Oscillometric units typically only measure the peak of this wave, the average blood pressure, and calculate the systolic and diastolic pressures.

A High Definition Oscillometric unit records the entire pressure wave, directly measuring the systolic and diastolic pressures. An HDO unit is usually connected to a computer to view the pressure wave and determine if the measurement was accurate.

How accurate is a blood pressure if my cat is nervous at the vet clinic?

Just like people, cats get anxious and nervous when visiting the vet clinic. Blood pressure is sensitive to this and it can be a challenge to measure your cat’s blood pressure.

Putting the odds in our favor:

Most of the time, you should be with your cat during a blood pressure measurement. Your cat knows you and trusts you. Your presence is reassuring and calming.
Allow your cat to settle in for 5-10 minutes – the measurement should be done in a quiet room.
If your cat likes to snuggle in your lap, see if the measurement can be done there. If your cat prefers to sit on his stomach, perhaps a tail measurement is best. If he is comfortable laying on his side, a hind leg may be better.
Using the front leg to measure blood pressure puts the practitioner in front of the cat; curious cats may want to take a nibble at the blood pressure cuff. I prefer that your cat be facing you, her person, who can reassure her. I feel the tail and hind leg work better.
The artery being measured, tail or hind leg, should be at the same level as the heart – so kitty should not be sitting up, but laying comfortably on his stomach or side.

What do the numbers mean?

Again, like people, the systolic pressure is ideally around 120.
Pressures 150 and over can indicate the need for medication.
Your vet may also do an eye exam, looking at the eye with an ophthalmoscope or lens. In some instances of high blood pressure, the vessels in the eye dilate and become twisted; sometimes the retina may be detached, resulting in blindness. If high blood pressure is caught early enough, blindness may resolve with treatment.

My cat’s blood pressure is high but her eyes looked OK. What next?

High blood pressure can be treated with drugs – the most common drug used is oral amlodipine. Amlodipine takes effect fairly quickly and a blood pressure can be repeated in about 10 days and the dose adjusted if needed.
Other medications such as benazepril or telmisartan may be used alongside or in place of amlodipine.

I don’t think the reading was accurate – my cat was too nervous

It is worth investing in a home blood pressure visit. A practitioner can come to your home and get a measurement where your cat feels safe and secure.

Measuring your cat’s blood pressure especially as she gets older will help keep her healthy and comfortable. Without treatment, high blood pressure can have serious side effects, including blindness, seizures, and cardiac damage.

Have your cat examined regularly by your veterinarian, as changes to the eyes or a heart murmur might warrant a blood pressure check.

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Treat the whole cat for a better quality of life

Posted on October 24, 2021 by felinepurrspective_u3q4o6

Elevated feeding station for a cat — Athena’s microchip feeder raised up on a platform.

My oldest cat, Athena, is 16 1/2 years old now. She was diagnosed with Chronic Kidney Disease (CKD) and osteoarthritis a few years ago.

Signs of CKD

Weight loss
Poor appetite
Lethargy
Increased thirst
Increased urination
Vomiting

Kidney disease can result in reduced appetite and weight loss due to underlying nausea. As the kidneys become less efficient, cats drink more and more water to compensate for the reduced filtration, but they just can’t drink enough. One side effect of this draw on the body water by the kidneys can be constipation. And constipation can also result in reduced appetite.

Athena was losing weight, seemed depressed, did not want to eat and was not very active. Her quality of life seemed to be declining.

My vet recommended:

a laxative
an appetite stimulant

I added the laxative to Athena’s moist cat food. When she ate things were good.

If she did not eat:

she did not get the laxative >>she would become constipated >> she would not eat even with the appetite stimulant.

I felt we were trapped in a downward spiral.

It is important to treat the whole cat when managing an older cat with multiple disorders.

treat the whole cat

medical treatment

In addition to kidney disease, Athena also suffers from arthritis. Having been a fairly active cat who went on daily walks, it was disheartening to see her decline her walk and stay at home. Her gait became stiffer, in spite of a heated bed and daily exercise in the form of play.

So, I wondered, what if the pain due to arthritis was a bigger player than we thought?

What if stiff and painful>>not moving as much>> bowels don’t move as well>> constipation >>drop in appetite?

I asked my vet “What if we treat the arthritis pain?” Athena moved fairly well in the vet clinic but x-rays showed quite a bit of arthritis in one hip and one knee. The vet prescribed gabapentin twice daily for Athena.

dietary changes

To reduce the constipation, Athena needed more fluid and a laxative. I decided to try a hydration supplement, Purina Hydracare, and added the laxative to the Hydracare. Fortunately, she liked the Hydracare so down went the laxative in a little Hydracare! This way I knew she got the laxative without stressing about her eating her entire meal.

environmental changes

Because her hips are painful, it occurred to me that “maybe crouching down is painful” so I elevated the feeding station. While she eats, she puts weight on her back legs, helping strengthen her back legs, which are most likely weaker from her previous lack of activity.

eureka!

Athena has responded well to the gabapentin – it does affect her balance a bit but she has become more active again and we have resumed our daily walks.
Increased activity combined with the hydration supplement and laxative seem to have have eliminated the constipation.
Athena accepted the elevated feeding station right away – I guess being more comfortable encourages her to eat more.

the takeaway

It is important to “treat the whole cat”. Treating Athena’s arthritis pain seems to have been a game changer. Although reduced appetite and constipation often accompanies kidney disease, reducing the pain of arthritis has balanced this out, increasing mobility and appetite.

She is still an old cat but her quality of life has improved dramatically with these changes.

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Change how we think about cats

Posted on June 20, 2021July 3, 2021 by felinepurrspective_u3q4o6

The other day I was walking with Gus around the pond on the condo property. A neighbor came down the path – Gus approached him with his tail up, in greeting. The neighbor did not reciprocate but instead stopped a few feet away from Gus. Gus sat down and stayed still. The neighbor then walked by and muttered “ typical cat” as he passed by.

The neighbor clearly did not understand the tail up greeting. I wondered what he expected from Gus – was Gus supposed to come over wagging his tail? Gus approached with his tail up in friendly greeting. When the greeting was not returned (the neighbor did not offer his hand or get down on Gus’s level), Gus sat, and tried to figure out where the interaction was going – was it hostile or neutral? It certainly was not friendly.

Cats – Mysterious?

Indeed, we are more familiar with dogs’ body language than that of cats. People see dogs as more social than cats. Someone getting a puppy will plan to take it places, walk it and play with it.

Kittens often stay at home and don’t venture out into the outside world – we don’t have to walk them; after all they have litter boxes. Once the kitten grows into a cat, people often don’t “play” with her that much – after all she is getting older and seems to sleep most of the time. Many cat owners are not aware of the importance of “play” or hunting practice to a born hunter.

cats – social and trainable

In the past few decades, cats have increased in popularity as pets. Consequently, cat behavior and cat care have become popular subjects to study. We have learned that cats are social animals and can be trained. The stereotype of the aloof, antisocial cat is starting to change. We are starting to change how we think about cats.

We have found that kittens learn most efficiently during the “sensitive period, 2-7 weeks of age. Kittens who are handled kindly and gently by a variety of humans during the sensitive period quickly learn to accept people and enjoy being with them. [What Makes a Friendly Cat? ]

In the veterinary world, the Cat-Friendly Practice initiative aims to make vet visits more pleasant for cats and their owners. The Cat Friendly Practice acknowledges that “ cats are not small dogs”. Handling techniques geared toward reducing stress and acknowledgement of the cat’s superlative sense of smell are highlights of this program.

Many of us have had more time at home with our pets in the past year due to the COVID-19 pandemic. There is an increasing trend toward “humanizing” cats and dogs, celebrating their birthdays and giving them Christmas presents. While giving toys or tasty food on special days is harmless, we need to avoid treating cats as small humans in fur suits. They are CATS, a different species with their own behaviors and ways of communicating. [The Cat-Human Bond]

change how we think about cats

A quiet revolution is happening – be part of it. Change how we think about cats. Show people that cats are social and part of the family and that we can communicate with them by training them.

Train your cat to walk on a leash or ride in a backpack or stroller
Train your cat to a place in the living room where he can safely hangout while people are visiting
Video your cat sitting on command and post on social media
Are you or someone you know getting a kitten? Enroll in a kitten kindergarten or get a group of friends together to do your own!

So take on the challenge. Train your cat – become a “cat whisperer” and change how we think about cats!

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