rapid sequence induction. why intubate? airway protection – pre-transfer, burns decreased gcs –...
TRANSCRIPT
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Rapid Sequence induction
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Why Intubate?
• Airway protection – pre-transfer, burns
• Decreased GCS – Caution!
• Patient requires ventilatory assistance
• Need for hyperventilation
• Hyperthermia – paralyse
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Pre intubation
• Four P’s: Preparation, preoxygenation, position, plan
• Have your equipment ready
• Optimise oxygenation – individual for each patient
• Position the patient correctly
• Have a plan, have a plan B, have a plan C. Communicate these with the team
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Preparation
• Adequate assistance: Airway nurse, drugs nurse, SMO/consultant
• Physiological monitoring – include ETCO2
• Check equipment:– Laryngoscope + VL– IV line– ETT– Bougie/stylet
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Pre-oxygenation
• Standard pre-oxygenation should give 8 minutes in well adults, 5 minutes in sick adults, 2.5 minutes in obese adults
• We can do better!
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??
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More Better
+NP at 3-4 litres when awake, 15 litres as soon as asleep
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Even Better?
Probably not, but NIV is certainly reasonable
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Position
• Normal weight – “sniffing” – flex at lower C spine, extend at C1
• Overweight – “ramp” – Tragus level with sternomanubrial angle
• Children…
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Plan
• Have a plan and two backup plans• Communicate them.• E.G.:
– First I will trial intubation with direct laryngoscopy and a bougie
– Then VL with bougie– Then LMA– Then surgical airway
• You can alter your plan – but always change something before you have another attempt
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Drugs – general principles
• Think about them –adjust drugs and dose to patients
• My standard is rocuronium 1.2mg/kg and ketamine 1.5mg/kg
• Most of the other consultants use propofol, opiate and sux.
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Rocuronium
• Non depolarising muscle relaxant
• No fasciculations – prolongs time to desat
• Lasts 20-30 minutes
• Reversed with sugammadex – never happens
• Fewer contraindications than suxamethonium
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When to use sux
• Seizures/status – wears off quicker, you can see them fit
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Cricoid pressure
• Sellick BA. Cricoid pressure to control regurgitation of stomach contents during induction of anaesthesia. Lancet 1961; 2: 404–406.
• I don’t use it
• Consider bimanual manipulation if needed.
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Bougie or stylet?
• Use one or the other
• Stylet may be more traumatic, bougie is slightly more complicated.
• Bougie requires a well trained airway nurse.
• Do not take out the laryngoscope!
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Tube’s in. Now what?
• Check position – listen, ETCO2, CXR
• Secure tube
• Sedation – draw up before intubation if possible
• NGT
• IDC
• Head up 30 degrees
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Ventilator settings (not COPD)
• SIMV/VC – do not worry about other modes for now
• Vt around 6-8mg/kg
• Rate around 14
• PEEP 5
• FiO2 – start at 100% and titrate down until sats <100%
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Vantilator settings (COPD/asthma)
• SIMV/VC
• Vt 8mL/kg
• Rate 10
• PEEP 0
• IE ratio 1:4-5
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Ventilator troubles
• If an alarm goes off, a breath is probably not given!
• Take the patient off the vent and bag them
• High pressures• Hypoxia• Hypotension• These are for another lecture