Perfusion scintigraphy and patient selection for lung volume reduction surgery

Area of Science:

• Pulmonary Medicine
• Surgical Oncology
• Radiology

Background:

• The efficacy of lung volume reduction surgery (LVRS) in predicting patient response remains uncertain.
• Perfusion scintigraphy is a key imaging technique for assessing lung function.

Purpose of the Study:

• To investigate the predictive role of perfusion scintigraphy in patient selection for LVRS.
• To determine if lung perfusion patterns can identify emphysema patients who will benefit from LVRS.

Main Methods:

• An intention-to-treat analysis included 1,045 patients from the National Emphysema Treatment Trial with complete baseline perfusion scintigraphy data.
• Patients were categorized by emphysema distribution (upper lobe-predominant vs. non-upper lobe-predominant) and exercise capacity.
• Low upper zone perfusion was defined as <20% of total lung perfusion in the upper third of the lungs.

Main Results:

• LVRS reduced mortality in patients with upper lobe-predominant emphysema and low upper zone perfusion (RR, 0.56; P=0.008) and in those with high exercise capacity (RR, 0.70; P=0.02).
• Patients with upper lobe-predominant emphysema and high upper zone perfusion showed no significant mortality benefit from LVRS.
• For patients with non-upper lobe-predominant emphysema, LVRS did not improve survival, irrespective of perfusion levels.

Conclusions:

• LVRS offers a survival benefit over optimal medical management for patients with upper lobe-predominant emphysema and low upper lung perfusion.
• Perfusion scintigraphy is a valuable tool for selecting patients with upper lobe-predominant emphysema who are likely to benefit from LVRS.