Figure 2.

The newly developed micro-TOS sensor and thoracoscopic tissue oxygen saturation measurement. (A) An extremely small-sized tissue oxygen saturation monitor was molded into a rod with a diameter of 8 mm and a length of 250 mm to be inserted through the access port during endoscopic surgery. (B) A near-infrared LED and a near-infrared sensor were built on the tip of the rod. (C) When the surrounding area was covered with black resin and brought into close contact with the tissue, tissue oxygen saturation could be measured in a state where local light was shielded. UL, upper lobe of right lung; ML, middle lobe; LL, lower lobe; MLB, middle lobe bronchus; BS, bronchial stump (the location of the cut and stapled inferior trunk).