What
is an anaesthetic?
Anaesthetics are drugs, given by injection or as gas, to make
an animal unconscious and to relieve pain. We use anaesthetics daily to help us perform
all sorts of procedures, from x-rays to complex surgery. Are anaesthetics safe?
All anaesthetics carry a small risk. We minimise this risk to
our patients in a number of ways:
Pre-anaesthetic checks - the vet always examines a patient
before giving an anaesthetic.
Pre-anaesthetic screen - this blood and urine test is
offered to all owners for their pets and is particularly useful for picking up unsuspected
problems, for example kidney trouble, anaemia and diabetes.
Choosing the right anaesthetic - in general, we use a short
acting injected agent, given straight into the blood stream, and follow this with
anaesthetic gas. We can also use Rapinovet, which is widely used in human medicine and
gives a rapid and more pleasant recovery. This may cost extra but will always be offered
if it is thought appropriate, or if specifically requested.
Patient monitoring - this is the most important part of
giving an anaesthetic. All cases are monitored by a trained nurse throughout the
procedure, using modern techniques and equipment. An ECG monitor records the electrical
activity of the heart and a Pulse Oximeter records the pulse rate and the oxygen level in
the blood. Patients are kept in our recovery area, intensive care unit or on the wards
until the veterinary surgeon is happy that recovery is progressing well, and only then are
they allowed home.
We try to send animals home to their own familiar
environment as soon as we can, and often sooner than a person would be discharged from
hospital. Please follow carefully all the instructions given to you for the recovery
period, and do not hesitate to ring if you are concerned or unsure about any aspect of the
recovery - we always have a nurse or vet available for you to speak with. We are, of
course, happy to hospitalise patients for longer if you wish.
Is my pet too old to have an anaesthetic?
Age is not a barrier to anaesthesia, and we often give
anaesthetics to very old animals (even 19-20 year olds!) with few problems. It is the
presence of disease that increases the risk, hence the importance of the pre-anaesthetic
screen. In fact, older animals are more likely to need to have an anaesthetic, as they
develop problems such as bad teeth and gums, tumours, etc. The longer these problems are
left, the worse they get until they can become life threatening, so don't delay seeking
treatment or having an operation because your pet is old - the disease may cause much more
trouble than the anaesthetic. It is also now well established that bad teeth can cause
kidney, heart and chest problems as well as a sore mouth. Of course, every case is
assessed individually, and if you have any worries or questions please ask the vet or one
of the Veterinary Health Advisors before making any decisions.
What do I do before I bring my pet in?
An empty stomach is essential, so give no food after 8pm the
night before. Cats should be shut in so they do not hunt. Water should be freely
available. If you are not sure whether your pet has eaten, please say so.
Please allow your pet to spend a penny, if possible, before
coming to the surgery. For safety's sake have your dogs on leads, and cats in baskets.
What happens after I leave my pet with you?
Usually, patients are admitted on the morning of the
operation. Fairly soon after admission, if a pre-anaesthetic screen has been requested,
the blood sample is taken and tested in our lab. The results are then examined by a vet
who will ring you to discuss them. Please make sure that you leave us a daytime telephone
number for this reason. A premed will then be given. This is an injection which reduces
the patient's anxiety and counteracts some of the side effects of the general anaesthetic.
A pain killing drug may also be given at this time, so that it is working during the
procedure and after the animal wakes up. Within 10-20 minutes, the patient is usually
relaxed and may be quite sleepy.
When we are ready to start the procedure, the Induction drug is given. This is usually
injected into the vein on the front of the leg, after clipping away a small amount of
hair. The injection is given quickly and your pet usually becomes unconscious in just a
few seconds. A tube is then passed into the trachea (windpipe) and connected to a gas
anaesthetic machine, supplying measured amounts of oxygen, nitrous oxide and halothane or
isofluorane (the anaesthetic gases) directly to the patient.
Surgical operations are carried out in a fully equipped
dedicated theatre using sterile procedures. As soon as the procedure is finished, pure
oxygen is given, and the patient usually starts to wake up within a few minutes. The tube
is removed and recovery is monitored by the vet and nurse until the patient is well awake
and ready to go home. Further pain killing drugs may be given if necessary.
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We understand how worried you are when you
have to leave your pet for an operation. Do ask to be shown round the operating department
and wards if you wish to see how we work, and on the day - do phone to check on progress
rather than sit at home wondering how things are going.
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