Document Detail

Effects of adding small amounts of oxygen to a carbon dioxide-pneumoperitoneum of increasing pressure in rabbit ventilation models.
MedLine Citation:
PMID:  18823885     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To evaluate the metabolic consequences of the addition of oxygen to the CO(2)-pneumoperitoneum. DESIGN: Prospective randomized study in rabbits. After 30 minutes of ventilation pneumoperitoneum was maintained for 90 minutes with pure CO(2) or CO(2) with 2% or 6% of oxygen. The intraperitoneal pressure was increased from 10 to 15 and 20 mm Hg every 30 minutes. Ventilation rate was either fixed or a progressive hyperventilation. End points were changes in arterial blood gases (Pco(2), Po(2)), pH, acid-base balance (actual base excess [ABE], standard bicarbonate [SBC], standard base excess [SBE], hydrogen carbonate [HCO(3)(-)], concentration of total carbon dioxide [Tco(2)]); oxygen and oximetry (oxyhemoglobin [O(2)Hb], oxygen saturation [So(2)], reduced hemoglobin [RHb], total oxygen concentration [To(2)], and oxygen tension at half saturation assessing hemoglobin oxygen affinity [p50]); and lactate concentrations assayed every 15 minutes. SETTING: University research center. ANIMALS: Twenty-four adult female New Zealand white rabbits. INTERVENTION(S): Anesthesia, mechanical ventilation, and pneumoperitoneum. RESULT(S): The effects of CO(2)-pneumoperitoneum on all end points increased with the elevated intraperitoneal pressure and were more pronounced when ventilation was fixed. Changes were less when 2% or 6% of oxygen had been added to the CO(2)-pneumoperitoneum. With use of logistic regression, the addition of oxygen, intraperitoneal pressure, and ventilation were found to be independent variables affecting Pco(2), pH, ABE, SBE, HCO(3)(-), O(2)Hb, So(2), p50, and end-tidal CO(2). CONCLUSION(S): The metabolic consequences of the combined effect of increased intraperitoneal pressure and CO(2)-pneumoperitoneum were less when 2% to 6% of oxygen was added or when animals were hyperventilated. We suggest that metabolic and mesothelial hypoxemia caused by CO(2) absorption can be reduced by adding small amounts of oxygen and by hyperventilation.
Ospan A Mynbaev; Leila V Adamyan; Karina Mailova; Bernard Vanacker; Philippe R Koninckx
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Publication Detail:
Type:  Journal Article     Date:  2008-09-27
Journal Detail:
Title:  Fertility and sterility     Volume:  92     ISSN:  1556-5653     ISO Abbreviation:  Fertil. Steril.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-03     Completed Date:  2009-08-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372772     Medline TA:  Fertil Steril     Country:  United States    
Other Details:
Languages:  eng     Pagination:  778-84     Citation Subset:  IM    
Department of Operative Gynaecology, Scientific Centre for Obstetrics, Gynaecology, Perinatalogy, Moscow State University of Medicine and Dentistry, Moscow, Russia.
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MeSH Terms
Carbon Dioxide / administration & dosage*
Oxygen / administration & dosage*
Pneumoperitoneum, Artificial / methods*
Respiration, Artificial / methods*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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