The Hs and Ts are a mnemonic used to identify potential reversible causes during resuscitation. Which statement accurately describes their purpose?

• A. They guide reversible-cause treatment during arrest
• B. They decide airway management strategy
• C. They determine the defibrillation energy
• D. They guide post-arrest cooling decisions

Answer: (B)

Hs and Ts are used to quickly identify potential reversible causes of cardiac arrest and guide targeted treatment during resuscitation. The mnemonic covers factors like hypoxia, hypovolemia, hydrogen ion excess (acidosis), electrolyte disturbances, and hypothermia, plus toxins, tamponade, tension pneumothorax, thrombosis, and trauma. When a reversible cause is suspected, interventions are directed at correcting it—ensuring oxygenation and ventilation for hypoxia, fluid or blood for hypovolemia, correcting acidosis and electrolyte imbalances, rewarming for hypothermia, antidotes or decontamination for toxins, pericardiocentesis for tamponade, decompression for tension pneumothorax, and appropriate therapies for thrombosis or trauma. This focus on identifying and treating reversible conditions during arrest is why the statement about guiding reversible-cause treatment during arrest is the best fit. It’s not about airway management strategy, defibrillation energy, or post-arrest cooling decisions, which involve different aspects of care.