Cardiopulm resuscitation (Corrie) Flashcards
Crash cart box
- Rescuscitation drugs
- Laryngoscope with small and large blades
- Syringes with needles attached
- Fluids and delivery sets
- Catheters wtih t-sets/tape, etc
- Heparinised saline flushes
- Scalpels
- Basic laceration pack
- Suture
- Ambubag
- Thoracocentesis kit made up
- Blood collection tubes
The emergency area
- Selection of endotracheal tubes
- Oxygen source
- anesthesia machine
- EKG
- Defibrillator and gel
- Capnograph
- Drug dose chart
- Clippers
- Clock/timer and record sheets
Recognising a crisis
10 second patient assessment
- The 10 second patient assessment
- cessation of breathing/agonal breaths
- No palpable pulses
- No heart sounds
- Unresponsive
Recognising a crisis
Under anesthesia
- Under anesthesia
- cessation of respiration
- sudden EKG changes
- rapidly falling blood pressure/loss of doppler sound
- reduced CO2 output on capnograph
Patient selection
- respect owners wishes
- post-rescucitation care can be expensive
- Is cause of death reversible
- anesthesia/drug overdose
- restraint
- anemia
- hypovolemia
- vagal event
- vomiting
- straining to defecate
- Airway obstruction
- pericardial effusion
- unexpected arrest
*Age is not a disease!
Avoiding futile CPR
- Avoiding waste of resources
- Avoiding wastage of owners money
- Reducing emotional impact on staff
Aim of CPR
- Perfuse heart and brain with oxygenated blood
- Cerebral perfusion pressure
- mean arterial pressure - intracranial pressure
- Coronary perfusion pressure
- aortic diastolic pressure - right atrial diastonlic pressure
- Cerebral perfusion pressure
Do not…..
- Do an intracardial stick
- Do precordial thump
- Give glucose
- can cause hypoglycemia
- Give Ca and sodium bicarb
- very limited uses
Ventilation
Artificial respiration
- Artificial respiration with oxygen
- ideally endotracheal tube
- tracheostomy
- tight fitting face mask
- alternative airway device
- ambubag
- anesthesia machine
Ventilation
Technique
- Rate of artificial respiration
- between 10-12 breaths/minute
- Depth
- cause visible rise in chest wall
- Avoid excessive pressures
- > 20mmHg bad
- Avoid rapid respiration
- reduces chance of success by lowering CO
Perfusing heart and brain
- Circulation
- Chest compressions
- direct cardiac compression: small patients < 15 kg
- compresses directly over heart - causes artificial systole
- Thoracic pump mech: patients > 15 kg
- direct cardiac compression: small patients < 15 kg
- Chest compressions

Direct cardiac compression
Thoracic pump mech
- chest is a pump
- relaxation allows blood flow back towards heart
- one way valves ensure mostly one way

Thoracic pump mechanism
Chest compressions
Technique
- Rate between 100-120
- push hard
- allow complete relaxation
- allows ventricular filling
- Don’t stop
- pauses associated with reduced survival
- have someone else monitor pulses, capnograph
Open chest CPR
- Technique for maximising blood flow by direct cardiac massage
- May allow dealing with underlying cause of arrest
- Sometimes expensive aftercare
Indications for open chest CPR
- Pleural effusion
- Pneumothorax
- Pericardial effusion
- Chest trauma
- Recent thoracic surgery
- Dead on arrival
- Large dog: external chest compressions not effective
- Intra-operative arrests
Open chest CPR
Technique
- Cut at 5th or 6th rib space
- usually on right side
- Clipping ideal
- not essential
- If successful: close check
- antibiotics
- flush routinely
- thoracostomy tube
- remember internal thoracic artery
- routine closure
Monitoring CPR
- Return of pulses, spontaneous apex
- Capnograph
- EKG
- CO2 thru roof means reperfusion
EKG Rhythms
- Asystole
- Pulseless electrical activity
-
Ventricular fibrillation
- defib
-
Pulseless Ventricular tachycardia
- defib
- Sinus bradycardia
- Sinus tachycardia
- Ventricular tachycardia
Capnograph
- Sudden increase in CO2 output
- indicates ROSC
- Zero CO2 output
- innefective chest compressions
- accidental extubation
- zero blood flow

Asystole

Pulseless electrical activity
-seen in euthanasia: take off EKG

Course ventricular fibrillation
-shockable rhythm

Pulseless Ventricular fibrillation
-I think you shock this one…?
Venous Access
- Jugular cut down
- usually needed to do this
- do it quickly
- Saphenous, cephalic, medial femoral (cats)
Drug choices in CPR
- Vasopressors
- epinephrin
- vasopressin
*cause vasoconstriction, inc arterial pressure
Epinephrine
- Beta adrenergic agonist - looking for alpha 2 properties
- Low dose way to go
- 0.01-0.02 mg/kg
- admin IV every 3-5 minutes
- can give endotracheally
- double dose
Vasopressin
- Potent peptide pressor
- remains more effective in toxic, acidic environments
- dose: 0.8 units/kg
- can be given endotracheally
- rescue therapy if epinephrine fails
- benefecial in severe acidosis/prolonged arrest
Atropine
- for bradycardia
- can reverse vagally mediated arrest
- dose: 0.04 mg/kg
Anti arrhythmics
- Lidocaine
- poor efficacy
- electrical defibrillation first
- diminishes effectiveness of defibrillation
- cautious use in cats
- Amiodarone
- can help convert ventricular fibrillation and electrical defibrillation
- can cause anaphylaxis
- consider if 2 defibrillations are unsuccessful
Sodium bicarb
- Generally overused
- Only use if
- severe pre-existing metabolic acidosis
- OR in arrests due to hyperkalemia
- And if other methods haven’t resolved problem
- Used guided by blood gasa
Calcium gluconate
- Use in arrests only if
- hyperkalemia was cause of arrest
- blocked cat
- Severe pre-existing hypocalcemia
- eclampsia
- hyperkalemia was cause of arrest
- contraindicated for all other arrest reasons
Reversals
- Opioids
- Benzodiazepines
- Alpha 2 agonists
- Opioids
- Naloxone
- Benzodiazepines
- Flumazenil
- Alpha 2 agonists
- Atipamezole
- Yohimbine
Defibrillation
- Converts ventricular fib into a perfusing rhythm
- temporarily stuns heart muscle
-
IT CAN KILL PEOPLE
- person holding paddles is responsible
- clear people of pet and table
- Dose (external)
- 2-4 J/kg
- clip fur away if possible
- use gel
- alcohol will light on fire
- deliver one shock them resume chest compressions 2-3 minutes
open chest CPR
Defib
- Internal defib paddles
- put saline soaked gauze between heart and paddles
- place directly across heart and press firmly before shocking
Fluid therapy
- Use if hypovolemic or severely dehydrated
- Isotonic crystalloid: LRS
- hypertonic crystalloid: 7.2% saline
- Colloids: hetastarch
- blood products/oxyglobin
- if arrest was due to anemia
*overuse of fluids can reduce cardiac perfusion
Post-resuscitation care
Myocardial dysfunction
- Myocardial dysfunction
- pressors usually needed
- dobutamine for myocardial contractility
- careful in cats
- dopamine commonly used
- start at 10 mcg/kg/min
- monitor EKG
- reduce dose if sig arrhythmia, tachycardia or hypertension
- norepinephrine
Post resuscitation care
Neurological dysfunction
- Neuro dysfunction
- can take hours to regain cranial nerve function
- young animals tolerate ischemia better than old
- serial neuro monitoring
- consider therapeutic hypothermia
Post resuscitation monitoring
- EKG
- Blood pressure
- Pulse ox
- PCV/TS
- Blood gases
Post-resuscitation: survival
- some may need ventilators
- nursing care
- 2-8% survival rate to hospital d/c