Monitoring of exhaled carbon monoxide and carbon dioxide during lung cancer operation.

Objective: Carbon monoxide (CO) is expelled mainly via the lungs, so that exhaled carbon monoxide (Ex-CO) concentration reflects endogenous production. Recent reports have shown that Ex-CO levels are increased in critically ill patients and after anaesthesia and surgery. However, there has been no investigation of the changes in Ex-CO level during a lung operation.

Follow-up using fluorescence bronchoscopy for the patients with photodynamic therapy treated early lung cancer.

Purpose: To evaluate the accuracy of fluorescence bronchoscopy by precise histological analysis of the photodynamic therapy (PDT) treated lesions.

Methods: A retrospective study was conducted on thirteen patients (16 lesions) with centrally located early lung cancer (CLELC) had been undergone photodynamic therapy and had been followed up by fluorescence bronchoscopy. Fluorescence bronchoscopy was performed between 1 and 60 months after photodynamic therapy.