A–3 month old female infant weight 4 kg and is suffering from loose motions. In examination she is found to be suffering from some dehydration.The amount of ORS to be given to her in the first four hour will be –
First, I need to recall the WHO guidelines for ORS administration in dehydration. The core concept here is calculating ORS volume based on weight and the degree of dehydration. Since the infant is dehydrated but the question doesn't specify the severity, I assume it's moderate or some dehydration as per the exam's wording.
The WHO recommends for some dehydration: 50-100 mL/kg over 4 hours. The infant weighs 4 kg. So 50-100 mL/kg would be 200-400 mL. The options likely include these ranges. The correct answer would be the middle value if options are A-D with 200-400 mL. Wait, but the exact answer depends on the specific option given. Since the user's correct answer is missing, I need to infer based on standard guidelines.
Wait, the user's correct answer is given as ". 200-400 mL". So the correct answer is option C or D, depending on the options. But the user hasn't provided the options. Maybe the options are like A. 100 mL, B. 200 mL, C. 300 mL, D. 500 mL. Then the correct answer would be C. 300 mL as a median. Or maybe the options are ranges. But since the correct answer is 200-400 mL, perhaps the options are in that range.
For the explanation: The core concept is ORS volume for dehydration. The correct answer is based on WHO guidelines. The wrong options would be incorrect volumes, maybe too low or too high. For example, 50 mL/kg (200 mL) is the lower end, but maybe the options have 200-400 as an option. The clinical pearl is the WHO recommendation for ORS in dehydration. The key point is the volume based on weight and severity. The correct answer is 200-400 mL over 4 hours.
**Core Concept**
The World Health Organization (WHO) recommends oral rehydration therapy (ORS) for managing dehydration in children. The volume depends on the infant’s weight and dehydration severity. For **some dehydration**, the formula is **50–100 mL/kg over 4 hours**.
**Why the Correct Answer is Right**
The infant weighs 4 kg. Using the WHO guideline (50–100 mL/kg), the total ORS required is **200–400 mL** over 4 hours. This accounts for replacing fluid deficits and ongoing losses. The range allows flexibility based on clinical judgment and severity.
**Why Each Wrong Option is Incorrect**
**Option A:** Likely corresponds to 50–100 mL total (too low for a 4-kg infant).
**Option B:** May represent 100–200 mL (insufficient for some dehydration).
**Option D:** Could be 500–1000 mL (excessive, reserved for severe