When it comes to pediatric emergencies, shock and dehydration are among the most time-sensitive and potentially fatal conditions. But the good news? With early recognition and swift, systematic management, most cases can be reversed.
💧 Understanding Shock
Circulatory Failure
Shock is a state of circulatory failure — tissues and organs don’t get enough oxygen because blood flow is inadequate. In children, shock develops quickly and can be harder to detect than in adults.
⚠️ Types of Shock in Children
| Type | Key Cause | Example |
|---|---|---|
| Hypovolemic | Fluid loss | Dehydration, hemorrhage |
| Distributive | Abnormal vasodilation | Sepsis, anaphylaxis |
| Cardiogenic | Pump failure | Congenital heart disease, myocarditis |
| Obstructive | Flow obstruction | Tension pneumothorax, cardiac tamponade |
💡 Exam tip: Hypovolemic shock is by far the most common in pediatrics — especially from severe diarrhea and vomiting.
🧠 Early Recognition — “The Subtle Signs”
Detecting Shock
Children compensate very well until they suddenly crash — so early detection is everything. Look out for:
- Tachycardia (first sign)
- Cool peripheries / delayed capillary refill
- Weak pulse
- Fast breathing
- Restlessness or lethargy
- Reduced urine output
Late signs (danger!):
- Hypotension
- Altered consciousness
- Absent peripheral pulses
💬 Mnemonic: “FAST heart, COLD hands, SLOW urine” → Think shock!
💦 Dehydration — The Common Culprit
Assessing Dehydration
Dehydration is one of the main causes of shock in children — often due to gastroenteritis.
Degrees of Dehydration:
| Type | Key Features | % Body Weight Loss |
|---|---|---|
| Mild | Thirsty, alert, moist mucosa | <5% |
| Moderate | Sunken eyes, dry mouth, delayed skin pinch, irritable | 5–10% |
| Severe | Lethargy, very sunken eyes, poor skin turgor, weak pulse | >10% |
🧴 Management Approach
Step 1: Rapid Assessment (ABCDE)
- A: Airway
- B: Breathing
- C: Circulation — check capillary refill, pulse, BP
- D: Disability — consciousness
- E: Exposure — look for causes (bleeding, diarrhea, rash)
Step 2: Fluid Resuscitation (for Hypovolemic Shock)
- Use Isotonic fluids (Normal saline or Ringer’s lactate)
- Give 20 mL/kg bolus IV over 15–20 minutes
- Reassess → if still in shock, repeat up to 3 boluses (60 mL/kg total)
- Then continue with maintenance and replacement fluids
🚫 Avoid hypotonic solutions in shock (they worsen hyponatremia).
Step 3: Rehydration (for Dehydration from Diarrhea)
WHO Plan A, B, C:
| Plan | Indication | Fluid & Route |
|---|---|---|
| A | Mild | Oral rehydration at home |
| B | Moderate | ORS 75 mL/kg over 4 hours |
| C | Severe | IV fluids (Ringer’s lactate/NS) 100 mL/kg (30 + 70 rule) |
🧠 30 + 70 Rule: Give 30 mL/kg in 30 min (infants: 1 hr); Then 70 mL/kg in 2.5 hrs (infants: 5 hrs)
🧩 Step 4: Treat the Cause
Addressing Underlying Issues
- Antibiotics for sepsis
- Adrenaline for anaphylaxis
- Control bleeding if hemorrhagic
- Manage diarrhea with zinc and continued feeding
📉 Monitor and Reassess
Ongoing Evaluation
Keep checking:
- Vital signs (especially HR and CRT)
- Urine output (>1 mL/kg/hr = good perfusion)
- Mental status
- Weight (daily)
💬 In a Nutshell
| Step | Key Point |
|---|---|
| Recognize | Tachycardia, cold skin, poor perfusion |
| Resuscitate | 20 mL/kg isotonic bolus |
| Rehydrate | Use WHO Plan A–C |
| Reassess | Every 15–30 mins |
| Refer | If persistent shock or complications |
❤️ Take-home for Med Students
“Children don’t stay in compensated shock for long. If you wait for hypotension, you’re already late.”