Preop assessment Flashcards
Why do you do pre-op assessment?
Identify risk to airway, anaesthetic and post op risks Modify risks Make decisions on medication Give advice on fasting Make decisions on post-op care
When do you do the pre-op?
2-4 weeks before surgery so it’s long enough to arrange any further investigations, but soon enough to avoid any interim medical problems
History
What is the procedure? PMH Previous surgery/anaesthetics + any problems Systems review Medication Allergies SH FH
What problems might you ask about when asking about previous surgery?
Airway/intubation problems
Reaction to drugs
N/V post op
What systems will you review?
Respiratory
Cardiac
Renal
Endocrine
What will you ask about socially?
Smoking
Alcohol - are they at risk of withdrawal?
Recreational drugs
Support at home/work
What would you be looking out for in FH?
Malignant hyperpyrexia
Myasthenia gravis
What is the problem with malignant hyperpyrexia?
Pt becomes dangerously hyperthermic when administered with certain volatile agents
What score is calculated?
American society anestheisa
What are the stages of ASA and what do they stand for?
1 - healthy patient, uncompromised
2 - minor disease
3 - severe systemic disease
4 - severe systemic disease with a constant threat to life
What counts as minor surgery?
Skin lesions
Breast abscess
Intermediate surgery
Varicose veins
Knee arthroscopy
Inguinal hernias (primary)
Major
Thyroidectomy
Colonic resection
Joint replacement
Adrenalectomy
Major plus
Cardiac surgery
What do you do after taking a history?
Obs Airway atm CV assessment Resp Abdo potentially
What counts as obs?
HR
BP
Temp
O2 sats at rest
What counts as airway assessment?
Neck extension/flexion
Mouth opening
Mallapati
Jaw protrusion
What questions are you going to ask them for the airway assessment?
Can you touch your chin to your chest?
How far can you open your mouth?
Can you get your bottom teeth in front of your top teeth?
What grading score is used to assess how easy it will be to put an endotracheal tube into the mouth?
Mallampati grading
Mallamapti score 1
Hard palate
Soft palate
Uvula
All pillars
Mallamapti score 2
hard palate
Soft palate
Uvula
Mallamapti score 3
Hard palate and soft palate
Mallamapti score 4
Hard palate only seen
What do you do after this scoring?
Special routine tests e.g. FBC, clotting, renal function, lung function, ABGs, ecg, kidney function tests