Three-dimensional vs two-dimensional video assisted thoracoscopic esophagectomy for patients with esophageal cancer

Figure 3 Preservation of the pulmonary function. Decline of the OI on PODs 1, 2, 3, 5 and 7 was significantly smaller in the 3D group compared to that in the 2D group (POD 1: 71.01 ± 17.92 mmHg vs 86.25 ± 15.91 mmHg; POD 2: 66.71 ± 17.58 mmHg vs 132.22 ± 25.04 mmHg; POD 3: 113.69 ± 20.25 mmHg vs 126.14 ± 22.96 mmHg; POD 5: 76.79 ± 23.52 mmHg vs 117.25 ± 34.88 mmHg; POD 7: 87.26 ± 19.88 mmHg vs 107.83 ± 27.11 mmHg, P < 0.01). OI: Oxygenation index; POD: Postoperative day; 3D: Three-dimensional; 2D: Two-dimensional.