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Flashcards in Preparation for anaesthesia Deck (14)
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1

What are the aims of pre-op assessments?

To check that owner, nurse and vet are all clear about exactly what procedure is to be performed

To gather all relevant patient history and information

To check body systems specifically affected by anaesthesia and general health

To categorise the risk of anaesthesia to the patient

2

There are 5 classes of anaesthetic risk. Describe an animal in class 1 (minimal risk) and give examples of a procedure

Normal healthy animal
No underlying disease

Spey, castration
Radiograph for hip dysplasia

3

There are 5 classes of anaesthetic risk. Describe an animal in class 2 (slight risk) and give examples of a procedure

Animals with slight to mild systemic disturbances
Animals able to compensate
No clinical signs of disease


Neonates, geriatrics
Fracture without shock
Well controlled diabetes

4

There are 5 classes of anaesthetic risk. Describe an animal in class 3 (moderate risk) and give examples of a procedure

Animals with moderate systemic disturbances
Mild clinical signs


Anaemia
low grade renal disease
low grade heart murmur

5

There are 5 classes of anaesthetic risk. Describe an animal in class 4 (high risk) and give examples of a procedure

Animals with pre-existing systemic disease or disturbances of a severe nature


Dehydration, shock
Uraemia, pyrexia
Uncompensated cardiac disease

6

There are 5 classes of anaesthetic risk. Describe an animal in class 5 (grave risk) and give examples of a procedure

Life-threatening disease or disturbance
Includes all moribund animals not expected to survive 24 hrs

Severe GDV
Advanced cardiac disease
Severe shock

7

What does a pre-op assessment include?

1) Signalment(age, sex, species, breed, weight)
2) History (previous/ongoing conditions)
3) Physical examination
4) Pre-anaesthetic blood tests
5) further diagnostic tests such as ultrasonography, ECG

8

What is checked during a physical examination?

General body condition

Cardiovascular:
H.R. , pulse, auscultation, mms, CRT

Respiratory:
auscultation, R.R., upper airway conformation

Temperature

Hydration status

Mentation/behaviour (for any CNS problems, and also assess temperament!)

9

What does the RBC count (PCV) analysis test?

oxygen carrying capacity

10

What does the ALT/ALP analysis test?

Liver function

11

What does the urea/creatinine analysis test?

Kidney function

12

What does the glucose analysis test?

Diabetes/stress

13

What does the albumin/TP analysis test?

Low levels are potential anaesthetic risk

14

What factors can affect anaesthetic risk?

Conditions affecting oxygen uptake/transport

Inability to metabolise and excrete anaesthetic drugs

Toxins predisposing to shock and cardiac arrhythmias

Hypothermia

Unfamiliarity: “there is no such thing as a safe anaesthetic, only a safe anaesthetist”