Abstract
Purpose: It has been reported that Integran®, a sheet-type absorbable topical collagen hemostat, is feasible for preventing pulmonary fistula after lung surgery. The most favorable aspect of Integran® is that it contains no blood products. However, the microscopic findings of post-surgery application of Integran® to the lung are not known. We identified 2 such cases of Integran® application, which were carried out a few years earlier, and described the microscopic findings.
Method: In case 1, a 53-year-old man underwent video-assisted left upper lobectomy for primary lung cancer. Integran® was applied to the left lower lobe. Completion left pneumonectomy was performed after 2 years and 1 month due to recurrence. In case 2, a 77-year-old woman underwent video-assisted right middle lobectomy for primary lung cancer. Integran® was applied to the right upper lobe. Completion right upper lobectomy was performed after 1 year and 8 months due to recurrence.
Results: The repaired visceral pleura of the 2 patients were covered with proliferated collagen fibers. However, there was little infiltration of inflammatory cells and fibroblasts.
Conclusion: The microscopic findings revealed that the ability of Integran® to generate inflammation or adhesion is weak, but it has the ability to repair damaged visceral pleura.
