Pre-anaesthetic Screening

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What is a pre-anaesthetic screen?

A pre-anaesthetic screen (PAS) is a blood test that your veterinarian performs in-clinic to assess your pet’s organ function before undergoing a general anaesthetic, and therefore minimises anaesthetic risk.

Why is a pre-anaesthetic screen important?

Although your pet may be young and healthy, blood tests may detect abnormalities that are not otherwise obvious, such as diabetes, liver, and kidney disease. This is important before a procedure because many anaesthetics are metabolised by the liver and kidneys.

How long does it take?

A PAS is run in the morning before your pet’s procedure, or in the days leading up to it. The Albert Animal Hospital has a comprehensive blood testing facility and we can get results within minutes. Your veterinarian may recommend some additional tests which are sent to an external laboratory and results are received within 24-48 hours.



Normal Results
If the results are within normal range, you can be confident that the

anaesthetic risks are minimised. In addition, the PAS results may provide

a base-line of what is normal for your pet, and can be helpful at future visits

and if certain medications need to be prescribed.


Abnormal Results
Abnormal blood test results can have various outcomes, which may include:
* Altering anaesthetic drugs and doses
* Supportive therapy during the anaesthetic procedure, such as intravenous fluids
* Postponing the procedure until the condition can be stabilised
* Further testing to pursue a specific diagnosis
* Retesting and monitoring levels in the future

You will be contacted to discuss any abnormal test results encountered before we proceed with any further treatment for your pet.

Some of the things we look for in a blood profile

PCV (Packed Cell Volume): Indicates dehydration or anaemia
ALP (Alkaline Phosphatase): Can be elevated in liver, bone, or gastrointestinal disease
ALT: Can be elevated in liver disease
BUN (Blood Urea Nitrogen): Can be elevated in kidney disease or dehydration
Creatinine: Can be elevated in kidney disease or dehydration
Glucose: Blood sugar levels – can be elevated with diabetes, stress or excitement
Total Protein: Indicates hydration levels

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