A common cause of shock in an infant is:

A common cause of shock in an infant is:

• A. Cardiac failure
• B. Severe allergic reaction
• C. Hypothermia
• D. Dehydration from vomiting and diarrhea

Answer: (D)

In infants, shock most often comes from loss of fluids due to vomiting and diarrhea. When a baby becomes dehydrated, the amount of blood in the vessels drops (hypovolemia), making it hard for the heart to circulate enough blood to meet the body's needs. Infants are especially vulnerable because they have a high body water turnover and rely on a small fluid reserve, so even relatively small losses can rapidly trigger shock. Early signs you’ll see include a fast heart rate, cool and clammy skin, dry mucous membranes, sunken fontanelle, and decreased urine output. Recognizing dehydration-driven shock is crucial because restoring fluids quickly helps recover perfusion to vital organs. While severe allergic reactions (anaphylaxis), cardiac problems, or hypothermia can cause shock, they are less common causes in typical infant emergencies. Anaphylaxis requires exposure and presents with widespread vasodilation and airway symptoms, cardiac issues are less common as an acute, widespread cause in this age group, and hypothermia is a less frequent origin compared to dehydration in gastroenteritis scenarios.

In infants, shock most often comes from loss of fluids due to vomiting and diarrhea. When a baby becomes dehydrated, the amount of blood in the vessels drops (hypovolemia), making it hard for the heart to circulate enough blood to meet the body's needs. Infants are especially vulnerable because they have a high body water turnover and rely on a small fluid reserve, so even relatively small losses can rapidly trigger shock. Early signs you’ll see include a fast heart rate, cool and clammy skin, dry mucous membranes, sunken fontanelle, and decreased urine output. Recognizing dehydration-driven shock is crucial because restoring fluids quickly helps recover perfusion to vital organs.

While severe allergic reactions (anaphylaxis), cardiac problems, or hypothermia can cause shock, they are less common causes in typical infant emergencies. Anaphylaxis requires exposure and presents with widespread vasodilation and airway symptoms, cardiac issues are less common as an acute, widespread cause in this age group, and hypothermia is a less frequent origin compared to dehydration in gastroenteritis scenarios.