title: Pulmonary function after segmentectomy for small peripheral carcinoma of the lung.
abstract: 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.
  
  
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Thoracic Surgery, Niigata Cancer Hospital, Kawagishi-cho, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takizawa
authors.forename: M
authors.initials: M
authors.lastname: Haga
authors.forename: N
authors.initials: N
authors.lastname: Yagi
authors.forename: M
authors.initials: M
authors.lastname: Terashima
authors.forename: H
authors.initials: H
authors.lastname: Uehara
authors.forename: A
authors.initials: A
authors.lastname: Yokoyama
authors.forename: Y
authors.initials: Y
authors.lastname: Kurita
mesh_terms: D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011013:Pneumonectomy / Q000379:methods*; D012129:Respiratory Function Tests; D012189:Retrospective Studies; D016896:Treatment Outcome