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.
journal_name
Am J Respir Crit Care Medauthors
Yasuda H,Yamaya M,Nakayama K,Ebihara S,Sasaki T,Okinaga S,Inoue D,Asada M,Nemoto M,Sasaki Hdoi
10.1164/rccm.200407-914OCkeywords:
subject
Has Abstractpub_date
2005-06-01 00:00:00pages
1246-51issue
11eissn
1073-449Xissn
1535-4970pii
200407-914OCjournal_volume
171pub_type
临床试验,杂志文章abstract::Historically, infections caused by Mycobacterium tuberculosis have been treated simultaneously with isoniazid and rifampin. As a consequence of this combined therapy, strains resistant only to rifampin were rarely recovered. However, recently there has been an increasing number of reports describing HIV-positive patie...
journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
doi:10.1164/ajrccm.153.2.8564140
更新日期:1996-02-01 00:00:00
abstract::Transbronchial biopsies (TBBs) are useful to diagnose acute rejection and infection in patients with lung transplants. The value of routine surveillance biopsies (S-TBBs) is not known, and such biopsies with a clinical indication are not without risk and are expensive. One hundred twenty-six 6-mo survivors of heart-lu...
journal_title:American journal of respiratory and critical care medicine
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journal_title:American journal of respiratory and critical care medicine
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abstract::Female Fisher 344 rats (n = 25) were inoculated intrapleurally with a single 20-mg dose of (JM-100) fibrous glass. The mean length (2.2 microns) and width (0.15 microns) of the fibrous glass particles was within respirable range. Following inoculation, the rats were killed at timed intervals ranging from 2 to 430 d fr...
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journal_title:American journal of respiratory and critical care medicine
pub_type: 临床试验,杂志文章
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更新日期:2000-10-01 00:00:00
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更新日期:2001-01-01 00:00:00