Cardiopulmonary Resuscitation (CPR) Practice 2025 - Free CPR Practice Questions and Study Tips.

Open chest CPR, also known as thoracotomy, is indicated for larger dogs, particularly those over 20 kg or belonging to large breed classifications. This is because these dogs have different physiological characteristics and body structures that may require a more invasive approach to resuscitation in life-threatening situations. In cases of severe cardiovascular collapse or when traditional methods of CPR (such as chest compressions performed with the hands) are ineffective, performing open chest CPR allows for direct access to the heart.

This technique can provide effective resuscitation efforts, as it enables the rescuer to manually massage the heart and administer medications directly. The size and thoracic cavity of larger breeds often necessitate this approach in emergencies to increase the likelihood of a successful outcome.

In smaller dogs or those below the specified weight, the risks associated with open chest CPR may outweigh the potential benefits, and alternative methods are typically sufficient. Therefore, opting for open chest CPR is primarily reserved for larger dogs where the anatomy and situation warrant its necessity.