Document Detail

Respiratory function in pregnancy at sea level and at high altitude.
MedLine Citation:
PMID:  15008764     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the effect of pregnancy on respiratory function in a non-Caucasian group and determine whether there was an interaction between pregnancy and altitude of residence. DESIGN: Prospective cross sectional study. SETTING: Antenatal clinics in Peru, at sea level in Lima and at high altitude in Cerro de Pasco. SAMPLE: Peruvian women with singleton pregnancies; 122 living at sea level and 192 living at 4300 m altitude in the Peruvian Andes. At each location, 19 non-pregnant women were also studied. METHODS: Respiratory function was measured in pregnant and non-pregnant women living at sea level and at 4300 m. MAIN OUTCOME MEASURES: Forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), peak expiratory flow rate (PEFR), total lung capacity (TLC), inspiratory capacity (IC), residual volume (RV), expiratory residual volume (ERV) and functional residual capacity (FRC). RESULTS: At sea level, RV and TLC were higher in the third compared with the first trimester (P < 0.05). At high altitude, FEV1 (P < 0.01), ERV (P < 0.01) and FRC (P < 0.01) were lower in the third compared with the first trimester. Pregnant and non-pregnant women at high altitude were 4 cm shorter (P < 0.0001) and had larger lung volumes (P < 0.01); their total lung capacities were approximately 1 L greater than women living at sea level (P < 0.0001). CONCLUSION: These results suggest that the effect of pregnancy on the respiratory function of healthy women is influenced by altitude of residence.
Fionnuala McAuliffe; Nikos Kametas; Jimmy Espinoza; Anne Greenough; Kypros Nicolaides
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Publication Detail:
Type:  Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  BJOG : an international journal of obstetrics and gynaecology     Volume:  111     ISSN:  1470-0328     ISO Abbreviation:  BJOG     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-03-10     Completed Date:  2004-04-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100935741     Medline TA:  BJOG     Country:  England    
Other Details:
Languages:  eng     Pagination:  311-5     Citation Subset:  AIM; IM    
Harris Birthright Research Centre of Fetal Medicine, King's College, London, UK.
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MeSH Terms
Body Height
Cross-Sectional Studies
Gestational Age
Infant, Newborn
Lung / physiology*
Pregnancy / physiology*
Pregnancy Trimester, First / physiology
Pregnancy Trimester, Third / physiology
Respiratory Function Tests
Total Lung Capacity

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