Medication in acute care Flashcards
Main drugs used in resus
Oxygen and adrenaline
Four main treatments in emergency care
Oxygen, analgesia, antibiotics and fluids
What happens when a medium dose of adrenaline is given
Acts on beta 1 receptors which cause the heart to drive SAN and myocardial contractility receptors
What happens when a high dose of adrenaline is given
Acts on alpha 1 receptors (after B1 are full) which cause constriction of peripheral blood vessels
How often is IV adrenaline used
Every 3-5 minutes
How much of adrenaline is used
10mls of 1/1000 solution
What is the overall aim of administering adrenaline
Increase BP and increase coronary artery perfusion - increase diastolic BP
When is amiodarone used
Shockable cardiac arrest rhythms, quickly in cardiac arrest, slowly in arrhythmias when patients are awake
How much amiodarone is used
30mg/ml injection
What is the action of amiodarone
Reduces myocardial excitability by increasing action potential duration and prolonging refractory period - reducing SA and AV node activity
What shockable rhythm is amiodarone used in
VF / pulseless VT defibrilator resistant to 3 shocks
What type of drug is amiodarone
Anti-arrhythmic. Class III (K blocker) but with other class effects such as beta blocker, Ca/Na blocker
What type of drug is adenosine
Naturally found nucleoside
What is the diagnostic action of adenosine used for
Used to block AV node to see the underlying pathology of what the atria are doing, to unmask the atrial activity. Diagnoses AF
What is the action of adenosine
Hyperpolarises cells to increase K+ influx and decrease Ca influx - slows SA node and blocks AV node conduction
What is the therapeutic action of adenosine
Used in narrow complex regular tachycardias
What is the role of atropine
Used in bradycardia with adverse features of MI, HF, shock or syncope
How much atropine is given
500 mcg IV
How much adenosine is given
6 mg rapid IV bolus then can increase if not effect
Action of atropine (3)
Anticholinergic, blocking vagal nerve activity and increasing HR