An 11-month-old cat was referred following a road traffic accident with non-weightbearing forelimb lameness and tachypnoea. A diaphragmatic rupture was repaired two days after trauma. Six days post trauma, a further operation was performed to repair the fractured humerus. As an intramedullary pin was advanced into the bone to achieve stabilisation, acute respiratory arrest occurred. Manual extrathoracic cardiopulmonary resuscitation was immediately instigated, but the cat did not recover. Postmortem examination identified a high degree of embolic fat occluding pulmonary capillaries. A massive embolic shower was established as the cause of death.
In this porcine model of induced cardiac arrest moderate within animal correlations were observed between mechanical and physiological markers of chest compression efficacy demonstrating the challenge in utilising a single mechanical metric to quantify chest compression efficacy. ICG amplitude demonstrated strong within animal correlations with compression depth and ETCO2 suggesting its potential utility to provide CPR feedback in the out of hospital setting to improve performance.
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