Mucous plugging simulating pulmonary embolism in patients with quadriplegia

Area of Science:

• Pulmonary Medicine
• Neurology
• Critical Care

Background:

• Quadriplegic patients often have impaired respiratory function due to reduced mobility and ineffective cough.
• Sudden onset hypoxia is a critical condition requiring prompt diagnosis and management.

Observation:

• Two quadriplegic patients presented with sudden loss of consciousness and elevated alveolar-arteriolar oxygen gradient.
• Chest X-rays were normal in both patients.
• Lung scintiscans revealed significantly reduced perfusion and ventilation in specific lung areas.

Findings:

• Scintigraphic findings suggested mucous plugging as the cause of hypoperfusion and hypoventilation.
• The clinical presentation mimicked acute pulmonary embolism.

Implications:

• Acute mucous plugging should be considered in the differential diagnosis of sudden hypoxia in quadriplegic patients.
• Early recognition can prevent misdiagnosis and guide appropriate respiratory interventions.
• This highlights the importance of respiratory monitoring and management strategies in immobilized patients.