NDLI: Effect of Boussignac continuous positive airway pressure ventilation on Pao2 and Pao2/Fio2 ratio immediately after extubation in morbidly obese patients undergoing bariatric surgery: a randomized controlled trial.

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Effect of Boussignac continuous positive airway pressure ventilation on Pao2 and Pao2/Fio2 ratio immediately after extubation in morbidly obese patients undergoing bariatric surgery: a randomized controlled trial.

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Effect of Boussignac continuous positive airway pressure ventilation on Pao2 and Pao2/Fio2 ratio immediately after extubation in morbidly obese patients undergoing bariatric surgery: a randomized controlled trial.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Guimarães, Joana Pinho, Daniela Nunes, Catarina S. Cavaleiro, Carla S. Machado, Humberto S.
Description	Author Affiliation: Guimarães J ( Department of Anaesthesiology, Emergency and Intensive Care, Centro Hospitalar do Porto, Largo Prof Abel Salazar, 4099-001 Porto, Portugal. Electronic address: joanaguimaraes@gmail.com.); Pinho D ( Department of Anaesthesiology, Emergency and Intensive Care, Centro Hospitalar do Porto, Largo Prof Abel Salazar, 4099-001 Porto, Portugal. Electronic address: daniepinho@gmail.com.); Nunes CS ( Clinical Anaesthesiology Research Centre, Anaesthesiology Service, Cento Hospitalar do Porto, Largo Prof Abel Salazar, 4099-001 Porto, Portugal); Cavaleiro CS ( Department of Anaesthesiology, Emergency and Intensive Care, Centro Hospitalar do Porto, Largo Prof Abel Salazar, 4099-001 Porto, Portugal. Electronic address: cscavaleiro@gmail.com.); Machado HS ( Department of Anaesthesiology, Emergency and Intensive Care, Centro Hospitalar do Porto, Largo Prof Abel Salazar, 4099-001 Porto, Portugal. Electronic address: director.anestesia@hgsa.min-saude.pt.)
Abstract	STUDY OBJECTIVE: Pathophysiological changes after laparoscopic Roux-en-Y gastric bypass may increase the risk of pulmonary complications in morbidly obese patients. The purpose of the study was to assess the impact of immediate postextubation use of Boussignac continuous positive airway pressure (CPAP) on arterial oxygenation in morbidly obese patients undergoing laparoscopic Roux-en-Y gastric bypass. The hypothesis is that the use of CPAP may improve oxygenation in the postoperative period when compared to Venturi mask. DESIGN: Randomized controlled study. SETTING: A tertiary referral hospital. PATIENTS: Recruited morbidly obese adult patients undergoing laparoscopic Roux-en-Y gastric bypass. INTERVENTIONS: Boussignac CPAP or Venturi mask was randomly applied immediately after extubation in the operating room and was maintained during the first 2 hours in the recovery room. MEASUREMENTS: Pao2 and Pao2/fraction of inspired oxygen (Fio2) ratio values were measured preoperatively and at 1 (T1), 2 (T2), and 24 hours (T24) after extubation, through arterial blood samples. Secondary outcomes (spirometric parameters) were measured at the same periods. For comparison between groups, Student t test, Mann-Whitney U nonparametric test, and χ(2) test were used. Statistical significance is at P < .05. MAIN RESULTS: Twenty-four patients were included, 12 in each group. There were no differences in preoperative evaluation. There were significant differences between groups in Pao2 and Pao2/Fio2 mean values at T1, T2, and T24, being superior in the Boussignac group. During the 24 hours postextubation, 9% of patients in the Boussignac group and 50% in the Venturi group had a Pao2 less than 60 mm Hg in at least 1 of the evaluations. After extubation, a Pao2/Fio2 ratio value less than 300 was observed in all patients in the Venturi group and in 55% in Boussignac group in at least 1 of the evaluations. There were no differences in spirometric parameters between groups at T1, T2, and T24. CONCLUSIONS: Application of Boussignac CPAP for 2 hours after extubation improved oxygenation but did not improve forced expiratory volume at 1 second and forced vital capacity.
File Format	HTM / HTML
ISSN	09528180
Journal	Journal of Clinical Anesthesia
Volume Number	34
e-ISSN	18734529
Language	English
Publisher	Elsevier
Publisher Date	2016-11-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Anesthesiology
Content Type	Text
Resource Type	Article
Subject	Anesthesiology and Pain Medicine

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