Document Detail

Role of pulse oximetry during nonsedated upper gastrointestinal endoscopic procedures.
MedLine Citation:
PMID:  10063740     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Although upper gastrointestinal endoscopy is generally a safe procedure, it is known to be associated with arterial oxygen desaturation, resulting in rare serious cardio-pulmonary events. OBJECTIVE: To determine the severity of oxygen desaturation during nonsedated upper gastrointestinal endoscopy and study the effect of various variables on oxygen saturation. METHODS: 126 patients underwent nonsedated upper gastrointestinal endoscopy (82 diagnostic, 44 therapeutic). Arterial oxygen saturation (SaO2) was monitored using a pulse oximeter. RESULTS: Baseline SaO2 was mean (SD) 97.8 (1.8%). It remained > 95% in 60.2% of patients during the procedure, whereas mild oxygen desaturation (SaO2 90%-94%) occurred in 23.7% and severe oxygen desaturation (SaO2 < 90%) occurred in 15.8% of patients. Six patients (4.7%) required supplemental oxygen administration sometime during the procedure. Desaturation occurred in patients undergoing diagnostic and therapeutic procedures but was severe in the latter group (p < 0.002). Patients aged more than 60 years (p < 0.001), hemoglobin < 10 g/dL (p < 0.001), history of smoking (p < 0.001), and underlying chronic obstructive airway disease (p < 0.001) were significantly related to oxygen desaturation. However, on multivariate analysis, no significant correlation was observed with hemoglobin value. CONCLUSION: Therapeutic intervention during nonsedated upper gastrointestinal endoscopy, old age, smokers and chronic obstructive airways disease are independent risk factors for oxygen desaturation. We recommend continuous monitoring of SaO2 in these high-risk patients undergoing upper gastrointestinal endoscopy.
G Javid; B Khan; M M Wani; A Shah; G M Gulzar; B Khan
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology     Volume:  18     ISSN:  0254-8860     ISO Abbreviation:  Indian J Gastroenterol     Publication Date:    1999 Jan-Mar
Date Detail:
Created Date:  1999-04-07     Completed Date:  1999-04-07     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8409436     Medline TA:  Indian J Gastroenterol     Country:  INDIA    
Other Details:
Languages:  eng     Pagination:  15-7     Citation Subset:  IM    
Department of Gastroenterology, SK Institute of Medical Sciences, Soura, Srinagar.
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MeSH Terms
Age Factors
Anoxia / etiology*
Endoscopy, Gastrointestinal* / adverse effects,  methods
Lung Diseases, Obstructive / complications
Middle Aged
Multivariate Analysis
Prospective Studies
Risk Factors

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