Pleural Manometry in Pneumothorax: Evaluating Tension Physiology and Predicting Outcomes

Area of Science:

• Pulmonology
• Thoracic Surgery
• Critical Care Medicine

Background:

• Tension pneumothorax (TP) is traditionally defined by pleural pressure exceeding atmospheric pressure, leading to hemodynamic compromise.
• Direct measurement of pleural pressure (Ppl) in TP has been limited by technical challenges.
• The predictive value of Ppl for pneumothorax outcomes remains understudied.

Purpose of the Study:

• To investigate if elevated pleural pressures increase the risk of developing tension pneumothorax.
• To determine if pleural pressures are associated with the need for pleurodesis or patient death.

Main Methods:

• A multicenter, prospective, observational study enrolled patients with newly diagnosed pneumothorax.
• Pleural pressure (Ppl) was measured throughout the respiratory cycle at the time of chest thoracostomy.
• Patients were followed for outcomes including pleurodesis and in-hospital death.

Main Results:

• Thirty-seven patients with pneumothorax (9 tension, 28 nontension) were included across 5 centers.
• Increased inspiratory Ppl (OR 1.40) and expiratory Ppl (OR 1.22) were associated with a higher risk of tension pneumothorax.
• Lower inspiratory Ppl correlated with an increased risk of requiring pleurodesis (OR 0.66).

Conclusions:

• Measuring pleural pressure (Ppl) in tension pneumothorax (TP) is feasible.
• Elevated Ppl alone may not solely determine TP development.
• Ppl measurement shows potential as a predictive tool for guiding earlier management of pneumothorax, particularly for pleurodesis, warranting further investigation.