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J Thorac Cardiovasc Surg 1999;118:536-541
© 1999 Mosby, Inc.

GENERAL THORACIC SURGERY

PULMONARY FUNCTION AFTER SEGMENTECTOMY FOR SMALL PERIPHERAL CARCINOMA OF THE LUNG

From the Departments of Thoracic Surgery^a and Clinical Oncology,^b Niigata Cancer Hospital, Niigata, Japan.

Address for reprints: Tsuneyo Takizawa, MD, Department of Thoracic Surgery, Niigata Cancer Center Hospital, 2 Kawagishi-cho, 951-1388 Niigata, Japan.

Objective: The aim of this study is to compare the pulmonary function after a segmentectomy with that after a lobectomy for small peripheral carcinoma of the lung.
Patients And Methods: Between 1993 and 1996, segmentectomy and lobectomy were performed on 48 and 133 good-risk patients, respectively. Lymph node metastases were detected after the operation in 6 and 24 patients of the segmentectomy and lobectomy groups, respectively. For bias reduction in comparison with a nonrandomized control group, we paired 40 segmentectomy patients with 40 lobectomy patients using nearest available matching method on the estimated propensity score.
Results: Twelve months after the operation, the segmentectomy and lobectomy groups had forced vital capacities of 2.67 ± 0.73 L (mean ± standard deviation) and 2.57 ± 0.59 L, which were calculated to be 94.9% ± 10.6% and 91.0% ± 13.2% of the preoperative values (P = .14), respectively. The segmentectomy and lobectomy groups had postoperative 1-second forced expiratory volumes of 1.99 ± 0.63 L and 1.95 ± 0.49 L, which were calculated to be 93.3% ± 10.3% and 87.3% ± 14.0% of the preoperative values, respectively (P = .03). The multiple linear regression analysis showed that the alternative of segmentectomy or lobectomy was not a determinant for postoperative forced vital capacity but did affect postoperative 1-second forced expiratory volume.
Conclusion: Pulmonary function after a segmentectomy for a good-risk patient is slightly better than that after a lobectomy. However, segmentectomy should be still the surgical procedure for only poor-risk patients because of the difficulty in excluding patients with metastatic lymph nodes from the candidates for the procedure.

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