Chapter 6: Advanced Life Support Algorithm Flashcards
What are the shockable rhythms?
VF and pVT
Pulseless VT
What are the non-shockable rhythms?
Asystole and PEA
PEA
What are the key basic interventions required in all ALS scenarios to improve survival?
Continuous high quality chest compressions
Early defibrillation
You notice a patient is unresponsive and not breathing. What are the initial steps in the ALS algorithm?
Call the resus team
CPR 30:2
Attach defibrillator/cardiac monitor
- one below right clavicle, other in V6 position in mid axillary line
Count assistant in to take over chest compressions so you can assess the rhythm
STOP CHEST COMPRESSIONS BRIEFLY - to assess rhythm. Start CPR again whilst charging then shock.
You see a shockable rhythm. What are the next stages of management?
Perform 1 shock (safely) at 150J
Immediately resume CPR for a further 2 minutes minimising interruptions
You have shocked a patient once but after 2 minutes, the patient remains in VF. What do you do?
Safely deliver second shock - typically 300J
Immediately resume CPR for further 2 minutes
Following 2 shocks, the patient remains in VF. What should you do?
Shock again at 360J
Give 1mg IV adrenaline (1:10,000) and 300mg IV amiodarone while performing further 2 minutes CPR
How frequently is adrenaline given once it has been started?
Every 3-5 minutes (every alternate cycle)
Continue for as long as cardiac arrest persist
If organised electrical activity is seen compatible with cardiac output following a shock, what should be done?
Assess for ROSC
- check for signs of life
- check for central pulse
- assess end-tidal CO2
If there is ROSC - ABCDE
If there is organised electrical activity but no return of spontaneous circulation, what should be done?
Continue CPR and switch to the non-shockable algorithm - the patient is in PEA
If there is return of spontaneous circulation and electrical activity following treatment for VF, what should be done?
Start post-resus care
- Use A-E approach
- Aim for SpO2 of 94-98%
- Aim for normal pCO2
- 12 lead ECG
- Treat precipitating cause
- Targeted temperature management
How frequently can amiodarone be given following VF/pVT?
- 300mg after 3rd shock
- further 150mg after 5 shocks
Lidocaine 1mg/kg can be given if no amiodarone available but don’t mix
When should precordial thumps be considered?
Very low success rate for cardio version of shockable rhythm
Not recommended routinely
Use when awaiting arrival of defibrillator
How is a precordial thump given?
Use ulnar edge of fist
Strike sternum from height of 20cm and immediately retract fist
If a patient has a witnessed and monitored cardiac arrest with VF/pVT, what should be done?
Give 3 quick successive shocks
Rapidly check rhythm change and if appropriate check for pulse and signs of life
Start compressions and continue CPR for 2 mins if 3rd shock unsuccessful.
Continue normal ALS algorithm as if 1 shock has been given.
When is adrenaline and amiodarone given if a patient has stacked shocks due to witnessed VF/pVT?
Adrenaline - assume as if stacked shocks are first shock so after 2 further shocks (3 in total)
Amiodarone - give immediately (during CPR) as it should be given regardless after 3 shocks.
How are non-shockable rhythms managed according to the ALS algorithm?
- CPR 30:2
- Give adrenaline 1mg IV/IO - must be continued every 2 cycles from here on regardless of whether it changes to a shockable rhythm
- Check rhythm at 2 minutes and respond as according to this
If shockable rhythm, give shock then 2 mins of cpr then assess rhythm then if shockable shock then adrenaline every 2 cycles.
What classifies as a high quality chest compression?
Adequate depth - 5/6cm
Adequate rate - 100-120 bpm
Ensure full recoil of chest after each compression
Aim to change individual doing compression every 2 minutes to avoid fatigue