Developmental arrest means a halt in the usual progression of development, creating a plateau where further gains in skills—whether in movement, language, cognition, or social abilities—do not occur as the person ages. It’s not about accelerated growth in any domain; progress simply stops at a certain level. It’s also not complete stasis from birth, which would imply no development at all from the start, and it’s not a sudden loss of all skills, which would be regression. Rather, the person maintains abilities at a fixed level and does not advance to higher milestones over time.

Accelerating intestinal transit to remove ingested poisons relies on speeding up gut movement so the toxin spends less time in the absorptive lining and is expelled more quickly. Cathartics provoke bowel movements and increase the speed of GI transit, helping eliminate poisons that remain in the gut or are not yet absorbed. Activated charcoal, by contrast, works through adsorption—binding toxins in the GI tract to prevent absorption—rather than speeding up transit. Urine alkalinization and hemodialysis remove toxins through the kidneys or directly from the blood, not by increasing GI motility. So the option that best fits the idea of hastening elimination by moving contents through the intestines is cathartics.

Placing a sterile pressure dressing over the wound is the best way to control external bleeding from a head injury. Direct, steady pressure helps the blood vessels clot and slows or stops the bleeding by compressing the wound, which is safer and more effective on the scalp and skull than other methods. Tourniquets aren’t appropriate for head bleeds because you can’t reliably isolate and compress arteries supplying the head, and applying a tourniquet in this region can cause tissue damage without reliably stopping the bleeding. Ice packs don’t stop active bleeding; they’re mainly for swelling and can mask ongoing bleeding or cause skin injury. Elevating the head isn’t a reliable method for stopping head bleeding and, if there’s potential spine or neck injury, keeping the head still and stable is more important while you manage the wound. If the dressing soaks through, don’t remove it—add more sterile dressings and maintain gentle pressure. Seek medical evaluation promptly since head injuries can hide serious problems, and bleeding control is just the first step in care.

Airway protection takes priority in an unresponsive patient with head injury. When someone is unconscious, the tongue and facial injuries can quickly block the airway, so opening and protecting the airway must come first. Use techniques that minimize neck movement, like a jaw-thrust with inline cervical stabilization, and clear any secretions or blood with suction as needed. Only once the airway is open and patent do you assess and support breathing, providing rescue breaths or assisting with a bag–valve mask and high-flow oxygen as indicated. After breathing is adequately supported, focus on circulation—checking for signs of bleeding, establishing large-bore IV access, and monitoring vital signs to identify and treat shock. This order prioritizes preventing hypoxia, which can rapidly worsen brain injury, and ensures the patient is ventilated before filtering into circulation concerns. In cardiac arrest from trauma, the approach can differ, but for an unresponsive head-injured patient, Airway first, then Breathing, then Circulation is the guiding sequence.