CBM CBM Inhalation Injury & Respiratory Management 3

Question 1

Acrolein, a toxic aldehyde released in fires, primarily injures which part of the respiratory tract?

Accepted Answer

Upper airways and bronchial mucosa causing direct chemical burns

Answer

Alveolar type I pneumocytes selectively

Answer

Pulmonary capillary endothelium only

Answer

Peripheral nervous system of the diaphragm

Question 2

Which parameter is most useful for monitoring the adequacy of CO elimination in a hyperbaric oxygen treatment session?

Accepted Answer

Serial carboxyhemoglobin levels via co-oximetry

Answer

SpO2 trends on pulse oximetry

Answer

End-tidal CO2 values

Answer

PaO2 on arterial blood gas

Question 3

In pediatric burn patients with suspected inhalation injury, which feature distinguishes their airway anatomy as a greater risk factor compared to adults?

Accepted Answer

Relatively smaller and more compliant airways that obstruct more easily with edema

Answer

Larger lung volumes relative to body size

Answer

More rigid tracheal cartilage

Answer

Higher functional residual capacity

Question 4

High-frequency percussive ventilation (HFPV) is used in inhalation injury patients primarily because it achieves which benefit?

Accepted Answer

Mobilizes secretions and improves clearance while delivering low mean airway pressures

Answer

Provides the highest possible FiO2

Answer

Eliminates the need for sedation

Answer

Replaces the need for bronchoscopy

Question 5

Smoke inhalation from wildland fires versus structural fires differs primarily in which toxic exposure profile?

Accepted Answer

Structural fires produce more synthetic polymer combustion products like HCN and CO, while wildland fires produce primarily organic particulate matter

Answer

Wildland fires always produce higher CO levels

Answer

Structural fires produce fewer particulates

Answer

Both produce identical toxic profiles

Question 6

Tracheostomy in a mechanically ventilated burn patient is generally preferred over prolonged oral endotracheal intubation after what timeframe, when long-term ventilation is anticipated?

Accepted Answer

7–14 days of mechanical ventilation

Answer

24–48 hours

Answer

30 days

Answer

Only when subglottic stenosis develops