Page 6 of 31

PE24.{2,6-11} | Respiratory Distress Emergency — SDL Guide (Part 3)

Applied Practice: Managing Respiratory Distress in a Simulated Setting

Simulation practice for respiratory distress management integrates the cognitive knowledge from earlier sections into a time-pressured, hands-on scenario. The goal is to practise the three core manual skills — oxygen device application, airway positioning, and BVM ventilation — under the direction of a structured assessment framework. Performing these skills correctly requires not just knowing the technique but having the muscle memory to execute the E-C grip, optimise head position, and judge tidal volume by watching the chest rise — all simultaneously, under the observation of an assessor.

The following is a structured scenario for supervised practice with a paediatric manikin or simulation mannequin:

Scenario: An 8-month-old infant is brought to you unresponsive, breathing shallowly at 10 breaths/min, SpO₂ 78% on room air. There are mild intercostal retractions. History: sudden deterioration following 3 days of bronchiolitis. You have a BVM kit, oxygen supply, and nasal cannula/mask available.

Performance checklist for the student:

Step	Expected action
1	Call for help and assign roles (compressor, airway, recorder)
2	Position infant in neutral/sniffing position (towel under shoulders)
3	Select correct BVM size (500 mL bag, size 0/1 round mask)
4	Connect oxygen at 10-15 L/min; check reservoir bag inflates
5	Apply E-C grip: three fingers on mandible (not soft tissues), C-clamp with thumb-forefinger
6	Squeeze bag — observe bilateral chest rise; do NOT use full bag compression
7	Ventilate at 20 breaths/min; allow passive recoil between breaths
8	Reassess after 5 breaths: SpO₂ trend, chest rise, gastric inflation
9	Communicate findings to team: 'SpO₂ improving to 92%, chest rising well, BVM effective'
10	Prepare for escalation (intubation) while maintaining BVM

Self-monitoring points during practice:
• Is the mask seal tight? Place your free fingers along the bony mandible, not over the soft submandibular triangle — pressing on soft tissue blocks the airway.
• Is the chest rising? If not, re-optimise head position first, then check mask seal, then check for airway obstruction.
• Are you ventilating too fast? Count aloud to pace 20 breaths/min in infants — hyperventilation reduces venous return and lowers cardiac output.
• After 2 minutes of BVM, offer to switch roles with a partner — BVM fatigue causes deteriorating seal and ventilation.

Self-Assessment: Respiratory Distress Emergency

Use these questions to test your integrated understanding across recognition, oxygen therapy, airway positioning, BVM technique, and monitoring. For each question, formulate your answer before reading the answer key — the cognitive effort of recall strengthens learning more than passive review. Pay particular attention to the oxygen device FiO₂ questions because these are high-yield for MBBS examination MCQs and OSCEs. For the clinical scenario questions, think through the full triangle of assessment before selecting your answer — resist the impulse to fixate on a single parameter such as SpO₂ in isolation. The minimum safe flow rate for a simple mask, the correct FiO₂ range of a non-rebreather mask, and the precise E-C grip description are the three most commonly asked factual points in paediatric emergency OSCEs and should be recalled from memory without hesitation. Spend a few minutes imagining yourself actually performing each skill described — mental rehearsal activates the same motor pathways as physical practice and reinforces procedural memory.

1. Name the three components of the triangle of assessment and give one example of an abnormal finding for each component that would indicate severe respiratory distress.
2. A 3-year-old child needs precise delivery of 28% FiO₂ because they have hypercapnic respiratory failure. Which oxygen device do you choose, and why?
3. What is the minimum safe flow rate for a simple face mask in children, and why?
4. Describe the E-C grip for bag-valve-mask ventilation: which fingers form the E, what do they do, and what does the C do?
5. An infant's SpO₂ is 93% on nasal cannula at 4 L/min. Their retractions are mild and they are alert and interactive. What is your management?
6. List four clinical signs that indicate a child has moved from compensated distress to impending respiratory arrest.

Answers:
1. Appearance (e.g., limp or unresponsive child); Work of Breathing (e.g., severe intercostal retractions, grunting, head bobbing); Circulation to skin (e.g., central cyanosis, mottled skin)
2. Venturi mask at the 28% connector — it is the ONLY device that delivers a fixed, reliable FiO₂ independent of breathing pattern; nasal cannula and simple/NRB masks deliver variable FiO₂ depending on respiratory rate and tidal volume
3. Minimum 6 L/min — below 6 L/min, the mask volume is not adequately flushed between breaths and the child rebreathes CO₂ from the dead space of the mask
4. The E: ring, middle, and index fingers placed along the bony mandible to lift the jaw (chin-lift); the C: thumb and forefinger forming a seal between mask and face. The E lifts the face into the mask; the C maintains the seal.
5. Continue current oxygen, reassess in 10-15 minutes; SpO₂ of 93% on 4 L/min with mild distress and normal appearance is an adequate response — titrate flow rate down if SpO₂ rises to ≥96%; do not escalate to a mask unnecessarily
6. Any four of: see-saw/paradoxical breathing; loss of grunting in a previously grunting child; bradycardia; severely reduced or absent respiratory effort (apnoeic episodes); limp appearance / profound alteration of consciousness; SpO₂ <85% despite maximal oxygen