Correct Answer: A

Rationale: In a 5-year-old boy with major trauma, a blood pressure of 70/40 mm Hg and a pulse rate of 140 beats/min, and weak, indicate decompensated shock. This presentation signifies inadequate perfusion, leading to compensatory mechanisms being overwhelmed, resulting in decompensated shock. Choice B is incorrect as the vital signs suggest the body is unable to adequately compensate for the trauma. Choice C is incorrect as the vital signs are more indicative of shock rather than increased intracranial pressure. Choice D is incorrect as such low blood pressure is not appropriate for a child of this age and indicates a critical condition.

Correct Answer: C

Rationale: When assisting ventilations in a 4-year-old child with a bag-valve mask, the EMT should block the pop-off valve if needed to achieve adequate chest rise. This action helps ensure effective ventilation and adequate oxygenation in the child. Blocking the pop-off valve allows for better control over the volume of air delivered and can help maintain positive pressure in the airway, assisting in improving oxygenation and ventilation in the child. Choices A, B, and D are incorrect because delivering each breath over 2 to 3 seconds is a general guideline but may need adjustment based on patient response, ensuring the appropriate mask size is important but not the primary concern in this scenario, and reassessing the pulse rate is not directly related to the ventilation technique being discussed.

Correct Answer: C

Rationale: Heart disease is the leading cause of death in geriatric patients. It encompasses a range of conditions affecting the heart and blood vessels, such as coronary artery disease and heart failure, which are more prevalent in older individuals. These conditions can lead to serious complications and ultimately result in higher mortality rates among the elderly population. Hypertension (choice A) is a risk factor for heart disease but not the leading cause of death in geriatric patients. Arthritis (choice B) is a chronic condition affecting the joints, not a primary cause of death in this population. Altered mental status (choice D) is a symptom rather than a leading cause of death in geriatric patients.

Correct Answer: D

Rationale: Administering oxygen and massaging the uterus are appropriate interventions to manage postpartum bleeding. Oxygen helps support tissue perfusion, and uterine massage can aid in uterine contraction, controlling bleeding. These actions are indicated when the mother experiences moderate vaginal bleeding post-delivery, as described in the scenario. Careful monitoring for signs of shock should continue while these interventions are implemented to ensure the mother's condition remains stable. Choices A and B are incorrect because packing the vagina with sterile dressings is not recommended for postpartum bleeding unless it is severe and immediate action is needed, while massaging the uterus is a proactive approach and should not be delayed until signs of shock develop. Choice C is also incorrect as rapid transport is not the primary intervention in this scenario where the mother is conscious, alert, and stable, and the focus should be on immediate management of the bleeding.

Correct Answer: A

Rationale: In a 5-year-old boy with major trauma, a blood pressure of 70/40 mm Hg and a pulse rate of 140 beats/min, and weak, indicate decompensated shock. This presentation signifies inadequate perfusion, leading to compensatory mechanisms being overwhelmed, resulting in decompensated shock. Choice B is incorrect as the vital signs suggest the body is unable to adequately compensate for the trauma. Choice C is incorrect as the vital signs are more indicative of shock rather than increased intracranial pressure. Choice D is incorrect as such low blood pressure is not appropriate for a child of this age and indicates a critical condition.