What is the ratio of compressions to ventilations for a medical cardiac arrest without ETT/SGA?

The ratio of compressions to ventilations for a medical cardiac arrest without an endotracheal tube (ETT) or supraglottic airway (SGA) is 30:2. This guideline is based on current cardiopulmonary resuscitation (CPR) recommendations which aim to maximize the effectiveness of chest compressions while ensuring adequate ventilations.

In this context, the 30:2 ratio is primarily designed for adult patients during collapse scenarios where high-quality chest compressions are crucial. The compressions should be delivered at a rate of 100 to 120 per minute, and the two ventilations provided after every 30 compressions allow for a brief pause to give breaths effectively during the cycle.

This systematic approach helps maintain blood circulation to vital organs while addressing the lack of oxygen due to the cardiac arrest, making it a vital component of advanced life support procedures. The other ratios don’t align with established guidelines or standard practices for resuscitation in adults experiencing cardiac arrest without advanced airway management.