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Your Singapore, the Tropical Garden City
give an indication that ventilation provided is adequate. References
CPR Cycle
An uninterrupted cycle of Basic Life Support lasting 2 minutes in intubated patients is recommended before checking for vital signs. If mouth to snout 2 minute cycle however 30 chest compressions with brief interruption to allow 2 quick breaths. Rotate personal doing chest compressions after each 2 minute cycle as it is very tiring and your compressions will not be effective after this time. If you feel you are tiring before the two minutes
is up speak up and swap with another team member immediately.
ECG
An ECG being placed is often classed as Advanced life support but it will tell us about the electrical activity of the heart in particular if we have Ventricular Fibrillation occurring.
PQRST Complex
The PQRST complex can tell us what is happening within the heart.
P wave indicates atrial depolarisation (atrial contraction)
QRS wave indicates ventricular depolarisation (ventricles contracting)
T wave indicates repolarisation (heart relaxed)
Defibrillation
Ventricular Fibrillation is an irregular quivering motion
of the ventricles caused by continuous disorganised electrical activity in the heart. An ECG trace will show no QRS complexes. Without co-ordinated contractions the blood is not propelled forward. The idea of a defibrillator is to depolarize the myocardial cells in the ventricles or to shock them into their refractory period and allow the pacemaker of the heart to start a normal sinus rhythm. If a defibrillator is not available a pre-cordial thump on the chest over the heart can be used although this is likely to not be very effective.
Conclusion
We only have 3 – 5 minutes to restore cerebral and coronary perfusion so we must act quickly but not panic. If you understand your role, work well as part of a team who practices CPR regularly and perform the necessary steps of CPR the patient has a greater chance at a positive outcome.
To access the Recover CPR Guidelines go to http:// onlinelibrary.wiley.com/doi/10.1111/vec.2012.22.issue-s1/ issuetoc
1. Journal of Veterinary Emergency and Critical Care 22 (s1) 2012 – Recover Emergency and Critical Care Guidelines on CPR
2. Lesley G. King, Amanda Boag - BSAVA Manual of Canine and Feline Emergency and Critical Care 2nd Edition
3. Donald C. Plumb - Plumbs Veterinary Drug Handbook 5th Edition
4. Animal Industries Resource Centre - Veterinary Nursing Technician Notes (CTVN L3) Emergency and Critical Care
5. Vetlearn Veterinary Technician - August 2012 Volume 33, Number 8 - “Cardiopulmonary Resuscitation: Administering fluids, oxygen and
drugs” Amy Breton, CVT, VTS (ECC)
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