Long-term effects of gastrectomy in patients with spirometry-defined COPD and patients at risk of COPD: a case-control study
Authors Saito H, Nomura K, Abe S, Motegi T, Ishii T, Hattori K, Kusunoki Y, Gemma A, Kida K
Received 22 April 2015
Accepted for publication 29 June 2015
Published 29 October 2015 Volume 2015:10(1) Pages 2311—2318
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 3
Editor who approved publication: Dr Richard Russell
Hitoshi Saito,1,2 Koichiro Nomura,1,2,† Shinji Abe,1,2 Takashi Motegi,2,3 Takeo Ishii,2,3 Kumiko Hattori,2,3 Yuji Kusunoki,2,3 Akihiko Gemma,2 Kozui Kida2,3
1Department of Respiratory Medicine, Tokyo Metropolitan Hiroo Hospital, 2Department of Pulmonary Medicine and Oncology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan, 3Respiratory Care Clinic, Nippon Medical School
†Koichiro Nomura passed away on July 30, 2014
Objective: Comorbidities are characteristic of COPD. However, little is known about the secondary manifestations of COPD in the gastrointestinal tract. Therefore, we aimed to explore the long-term effects of gastrectomy in patients with spirometry-defined COPD or those at risk of COPD.
Participants: Subjects included 87 patients either with COPD or at risk of COPD (symptomatic) who underwent gastrectomy between December 2003 and October 2013 (group A), and 174 patients either with COPD or at risk of COPD, matched by age (±5 years), sex, and forced expiratory volume in 1 second (FEV1) as percentage of predicted (FEV1% predicted) (±5%) (group B).
Methods: All patients underwent routine blood chemistry and pulmonary function tests, arterial blood gas analysis, 6-minute walk test (6MWT), high-resolution chest computed tomography scans, and nutritional assessments.
Results: The mean duration postgastrectomy was 18.3±15.4 years. The mean FEV1 and FEV1% predicted were 2.07±0.76 L and 74.6±24.5%, respectively. Univariate analysis indicated that group A patients had significantly lower body mass index, fat-free mass index, and serum hemoglobin and albumin concentration (all P=0.00), and walked a significantly shorter distance in the 6MWT (P<0.05). Multivariate linear regression analysis for the distance in the 6MWT indicated that increased residual volume (RV) to total lung capacity (TLC) as percentage of predicted (%RV/TLC) alone was an independent and significant predictor of reduced distances in the 6MWT.
Conclusion: We concluded that nutritional insufficiency in patients with COPD (or those at risk of COPD) who previously underwent gastrectomy might lead to hyperinflation and consequently, decreased exercise capacity.
Keywords: chronic obstructive pulmonary disease, nutritional insufficiency, 6-minute walk test
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