Increased arterial carboxyhemoglobin concentrations in chronic obstructive pulmonary disease.

Abstract:

RATIONALE:Exhaled carbon monoxide (CO) and arterial blood carboxyhemoglobin concentrations (Hb-CO) increase in inflammatory pulmonary diseases. OBJECTIVES:To study whether arterial Hb-CO is useful to monitor disease activity in patients with chronic obstructive pulmonary disease (COPD) who had stopped smoking. METHODS:We measured arterial Hb-CO, arteriovenous Hb-CO differences, and FEV1 in 58 patients with COPD and 61 ex-smoking control subjects. RESULTS:Arterial Hb-CO concentrations in patients at stable conditions were higher than those in control subjects (p < 0.0001). Furthermore, the Hb-CO concentrations in patients at the exacerbations (p < 0.0001) were higher than those at the stable conditions. Arterial Hb-CO concentrations in patients at stage III were higher than those in patients at stage II, and the Hb-CO concentrations in patients at stage IV were higher than those in patients at stage III at the stable conditions and exacerbations. Arterial Hb-CO correlated with exhaled CO in patients with COPD at stage II and stage III at the exacerbations. Arterial Hb-CO inversely correlated with the arterial blood partial oxygen pressure and FEV1. Arteriovenous Hb-CO differences in patients at the exacerbations did not differ from those in patients at stable conditions and from those in control subjects. Moreover, arterial Hb-CO correlated with serum C-reactive protein values and serum lipid peroxide concentrations. CONCLUSIONS:These findings suggest that increased arterial Hb-CO may relate to severity in patients with COPD because of lung and systemic inflammation and production of reactive oxygen species.

authors

Yasuda H,Yamaya M,Nakayama K,Ebihara S,Sasaki T,Okinaga S,Inoue D,Asada M,Nemoto M,Sasaki H

doi

10.1164/rccm.200407-914OC

keywords:

subject

Has Abstract

pub_date

2005-06-01 00:00:00

pages

1246-51

issue

11

eissn

1073-449X

issn

1535-4970

pii

200407-914OC

journal_volume

171

pub_type

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