title: Influence of carbon dioxide on respiratory function during posterior retroperitoneoscopic adrenalectomy in prone position.
abstract: OBJECTIVE
  To evaluate the influences of CO(2) insufflation on changes in blood gas analysis and end tidal CO(2) tension (PetCO(2)) during posterior retroperitoneoscopic adrenalectomy in the prone position.
  
  
  METHODS
  Arterial blood gas analysis and measurements of PetCO(2) were carried out during CO(2) insufflation in 16 patients who underwent posterior retroperitoneoscopic adrenalectomy in the prone position (PRA group). The results were compared to 10 patients who underwent open posterior adrenalectomy (OPA group). Ventilation was artificially controlled during the study period in all cases.
  
  
  RESULTS
  Arterial pH, PaCO(2), PetCO(2) and PaO(2) were not significantly different between the PRA and OPA groups. However, the PaCO(2)-PetCO(2) gradient in the PRA group was significantly higher than that in the OPA group (p < 0.01).
  
  
  CONCLUSIONS
  Transperitoneal absorption of CO(2) occurs in patients undergoing retroperitoneoscopy in the prone position. The alveolo-arterial CO(2) gradient may be the only parameter which indicates the absorption of CO(2) during PRA.
authors.affiliation: Department of Urology, Yamagata University School of Medicine, Yamagata, Japan. issaga@med.id.yamagata-u.ac.jp
authors.forename: I
authors.initials: I
authors.lastname: Sasagawa
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Izumi
authors.forename: N
authors.initials: N
authors.lastname: Shoji
authors.forename: T
authors.initials: T
authors.lastname: Nakada
authors.forename: S
authors.initials: S
authors.lastname: Takaoka
authors.forename: Y
authors.initials: Y
authors.lastname: Miura
authors.forename: H
authors.initials: H
authors.lastname: Hoshi
authors.forename: S
authors.initials: S
authors.lastname: Amagasa
authors.forename: H
authors.initials: H
authors.lastname: Horikawa
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000601:surgery*; D000315:Adrenalectomy / Q000379:methods*; D000328:Adult; D000704:Analysis of Variance; D001784:Blood Gas Analysis; D002245:Carbon Dioxide / Q000008:administration & dosage* / Q000009:adverse effects; D004724:Endoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011028:Pneumoperitoneum, Artificial / Q000009:adverse effects / Q000379:methods; D016684:Prone Position; D012129:Respiratory Function Tests; D012187:Retroperitoneal Space / Q000601:surgery; D018709:Statistics, Nonparametric; D013514:Surgical Procedures, Operative / Q000379:methods
chemical_list: D002245:Carbon Dioxide