Lung function following upper sleeve lobectomy for bronchogenic carcinoma.

Area of Science:

• Thoracic Surgery
• Pulmonary Medicine
• Medical Imaging

Background:

• Lung cancer treatment often involves lobectomy, a surgical removal of a lung lobe.
• Sleeve lobectomy and simple lobectomy are two surgical approaches with potentially different impacts on lung function.
• Assessing postoperative lung function is crucial for patient recovery and management.

Purpose of the Study:

• To compare the early and long-term postoperative lung function after upper sleeve lobectomy versus upper simple lobectomy for lung cancer.
• To evaluate changes in regional ventilation and perfusion in the operated lung.

Main Methods:

• A comparative study of 14 lung cancer patients (8 sleeve lobectomy, 6 simple lobectomy).
• Patients were matched for age and preoperative lung function (spirometry).
• Postoperative lung function assessed using 133 Xenon imaging for regional ventilation (Vr) and perfusion (Qr).

Main Results:

• Two weeks post-surgery, forced expiratory volume at 1s was more reduced after simple lobectomy.
• Early postoperative, regional ventilation and its vertical gradient were similarly reduced in the operated lung for both groups.
• One year after sleeve lobectomy, the vertical gradient of regional ventilation decreased, while regional ventilation and the Vr/Qr ratio increased significantly in the operated lung.

Conclusions:

• Upper sleeve lobectomy may result in less initial lung function impairment compared to upper simple lobectomy.
• Sleeve lobectomy can lead to significant long-term regional lung function changes, including an increased ventilation/perfusion ratio in the operated lung.