Pulmonary edema and the central nervous system: a clinico-pathological study

Area of Science:

• Neurology
• Pulmonary Medicine
• Critical Care

Background:

• Pulmonary edema is a known complication of central nervous system (CNS) disorders, particularly traumatic brain injuries.
• Raised intracranial pressure is often cited as a contributing factor in head injury-related pulmonary edema.

Purpose of the Study:

• To investigate the incidence and potential mechanisms of pulmonary edema in patients with central nervous system disorders, both traumatic and non-traumatic.

Main Methods:

• Retrospective analysis of over 2,100 patients with severe head injuries and 132 with cervical spinal cord/column injuries.
• Analysis of a separate cohort of patients with non-traumatic CNS disorders who developed pulmonary edema.

Main Results:

• Only two clear cases of pulmonary edema solely attributable to traumatic CNS injury were identified among the large patient cohorts.
• Pulmonary edema was observed in patients with non-traumatic CNS disorders, but conclusive pathophysiological explanations were elusive.

Conclusions:

• Pulmonary edema is a rare complication of central nervous system lesions, irrespective of traumatic or non-traumatic origin.
• The precise pathophysiological mechanisms underlying pulmonary edema in CNS disorders require further investigation.