Anaesthesia conduct Flashcards
Task of Anaesthetist
Pre op Assessment
Critical Care
Pain management
Post op care
Process of anaesthesia
Preop Assessment Preparation Induction Maintenance Emergence Recovery Post Op care and pain management
IV induction
Propofol, thiopentone
rapid 20s arm brain circulation
rapid loss of airway reflexes, apnoea common.
no obvious planes
Gas induction
Sevoflurane (Halothane), Slow, more obvious planes
Planes of anaesthesia
Analgesia/Sedation
excitation
anaesthesia: light to deep
overdose
Induction
monitor conscious level: loss of verbal contact movement respiratory pattern processed EEG planes Quietness, Gas or IV, Airway maintenance
Airway maintenance in anaesthesia
Head tilt chin life jaw thrust
face mask
oropharyngeal (guedel) airway- only tolerated by unconscious patient
Laryngeal mask airway-cuffed tube with mask sitting over glottis- does not protect from aspiration
Airway obstruction
Laryngospasm
forced reflex adduction of vocal chords
caused by airway stimulation in light planes of anaesthesia
Aspiration
loss of protective airway reflexes: gag swallow
Protection of airway
cuffed tube in trachea
endotracheal intubation
laryngeal reflexes abolished
classic method of using laryngoscope, muscle relaxant
why intubate?
protect airway
need for muscle relaxation, artificial ventilation
shared airway with risk of blood contamination
need for tight control of blood gases
restricted access to airway
risks to an unconscious patient
temperature loss of protective reflexes venous thromboembolism risk pressure areas (patient's position consent
continuing anaesthesia
monitoring fluid management muscle relaxation maintenance: IV/ Inhalational self or artificial ventilation
monitoring
Sp02, ECG, BP, FiO2, ETco2 respiratory parameters agent monitoring urine output NMJ Processed EEG Invasive venous arterial monitoring