A 14-Month-Old With Severe Dehydration Where the Fluid Schedule Depends on Age
A 14-month-old boy weighing 9.2 kg is brought to a community health centre with 3 days of watery diarrhoea and two episodes of vomiting. His mother has been offering home-made salt-sugar solution but he refuses to drink. He is lethargic, with sunken eyes, a skin pinch that takes 3 seconds to retract, and he is unable to drink when offered water. His heart rate is 158/min, respiratory rate 42/min, temperature 37.9 °C, capillary refill 4 seconds, and he has passed no urine for 8 hours. The centre has Ringer's lactate, ORS, zinc tablets and a functioning refrigerator, but no blood bank and no paediatric intensive care. There is one other staff nurse on duty and the medical officer has gone to a village outreach clinic, due back in about 2 hours.
1. Classify his dehydration using standard IMCI criteria and justify your classification point by point.
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Classification: severe dehydration. Under IMCI, severe dehydration requires two or more of the following signs, and this child has all four:
- Lethargy or unconsciousness - he is lethargic, which is a severe sign, not merely 'restless/irritable'.
- Sunken eyes - present.
- Unable to drink or drinks poorly - he is unable to drink when offered, which is the severe end of the spectrum.
- Skin pinch goes back very slowly (2 seconds or more) - his takes 3 seconds.
Why not 'some dehydration': some dehydration requires two or more of restlessness/irritability, sunken eyes, thirst/drinks eagerly, and a skin pinch that returns slowly. Restlessness is not lethargy, and 'drinks eagerly' is not 'unable to drink'. Substituting the milder criteria would under-treat him.
Supporting evidence that raises the acuity further:
- Heart rate 158/min, capillary refill 4 seconds, and no urine for 8 hours indicate hypovolaemic shock, not just dehydration.
- The two episodes of vomiting make oral rehydration unreliable at this stage.
Implication: he needs Plan C (IV Ringer's lactate) started now, not a trial of Plan B oral rehydration. If IV access cannot be secured within a short time, the correct fallback is intraosseous access or nasogastric ORS at 20 mL/kg/h for 6 hours - not repeated attempts at oral fluids while he remains shocked.
2. Calculate his total rehydration volume and write the exact fluid schedule, including why the timing differs from that used for a 6-month-old.
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Total volume: 100 mL/kg × 9.2 kg = 920 mL of Ringer's lactate.
Schedule for a child aged 12 months to 5 years (WHO Plan C):
- First part: 30 mL/kg = 276 mL over 30 minutes (approximately 550 mL/h).
- Second part: 70 mL/kg = 644 mL over 2 hours 30 minutes (approximately 258 mL/h).
- Total 920 mL over 3 hours.
Why the timing differs from a 6-month-old: for infants under 12 months the same 30 mL/kg is given over 1 hour and the 70 mL/kg over 5 hours, because a smaller infant tolerates a rapid bolus less well and has less reserve. This child is 14 months, so the faster paediatric schedule applies. Using the infant schedule in a 14-month-old would leave him shocked for an extra hour; using the older-child schedule in a neonate would risk fluid overload.
Additional orders and nursing actions:
- Check capillary blood glucose immediately; if below 54 mg/dL, give 10% dextrose 5 mL/kg IV and recheck.
- Start zinc: 20 mg daily for 14 days (children 6 months and over; 10 mg for infants under 6 months).
- Once he can drink, restart ORS 5 mL/kg after each loose stool, and continue breastfeeding.
- Weigh him on the same scale, measure urine output, and record intake and output hourly.
- Reassess at the end of the first 30 minutes and then at least hourly: heart rate, capillary refill, conscious level, skin pinch, respiratory rate, liver size and lung bases.
3. Two hours later he is alert, has passed urine, and his mother wants to take him home because 'the drip is finished'. What is your judgement?
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He is improving but not ready for discharge on the basis of one good hour.
What has actually been achieved:
- Alertness and urine output show that perfusion is returning, which is exactly the endpoint of the first and second phases of Plan C.
- Discharge now would miss the highest-risk window: children with severe diarrhoea can relapse within hours, and his mother has already had difficulty getting him to drink at home.
Before discharge, all of the following should be true:
- The full 920 mL has been given and observations are stable - normal heart rate for age, capillary refill under 2 seconds, moist mucous membranes, skin pinch normal.
- He is drinking ORS willingly and keeping it down. If he is still refusing oral fluids, he is not safe to go home regardless of how well he looks.
- Urine output is established, and the mother can demonstrate how to give ORS after each stool (roughly 5 mL/kg, about 45 mL per loose stool) and how to give zinc 20 mg daily for 14 days.
- The mother can state the danger signs that must bring him back: inability to drink, repeated vomiting, blood in stool, fever, sunken eyes, no urine, or becoming lethargic.
- The medical officer has reviewed him and documented the discharge plan - the nurse should not approve discharge alone.
Judgement call: the correct response is neither to insist he stay for days nor to let him leave. It is to explain what has improved and what has not yet been demonstrated, complete the ORS and zinc teaching, arrange review within 24–48 hours at the same centre, and document the counselling and the mother's demonstrated competence before discharge.