Gaszynski 2007.
| Methods | Study done at Medical University of Lodz, Poland | |
| Participants | Patients undergoing open Roux‐en‐Y gastric bypass Male/female, 8:11; BMI, kg/m2: 42.43 ± 3.3; age, years: 35.84 ± 9.05 |
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| Interventions | After surgery, participants were monitored in PACU (postanaesthesia care unit) for 8 hours Control group: 9 participants; oxygen via nasal cannula, 4 L/min Intervention group: 10 participants; CPAP Boussignac device, + 9.4 cm H2O Continuous SpO2 monitoring and frequent blood gases |
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| Outcomes | Duration of intervention: 8 hours Duration of follow‐up: most likely less than 1 day No differences in pain scores between groups All‐cause mortality: none Major respiratory complications as defined in individual studies: Postoperative pulmonary complications: none Significant atelectasis: not reported Pneumonia: not reported Respiratory failure: not reported Severe hypoxia: not reported Severe delirium: not reported Need for tracheal intubation and invasive ventilation: no Admission to ICU/IMC: intervention group: not reported Length of stay in hospital: not reported Cardiovascular complications (myocardial infarction, unstable angina, acute cardiac failure, arrhythmia): none reported Other postoperative complications (wound infection, anastomotic leak, renal failure): none, not sure for how long Adverse effects of intervention (pulmonary aspiration, upper airway or facial injury): not reported |
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| Notes | BMI = body mass index CPAP = continuous positive airway pressure ICU = intensive care unit IMC = intermediate care unit PACU = postanaesthesia care unit SpO2 = oxygen saturation |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | 'Randomly divided into two groups,' no further description |
| Allocation concealment (selection bias) | Unclear risk | No description in text |
| Blinding of participants and personnel (performance bias) All outcomes | High risk | Not stated |
| Blinding of outcome assessment (detection bias) All outcomes | High risk | Not stated |
| Incomplete outcome data (attrition bias) All outcomes | Unclear risk | Not clear |
| Selective reporting (reporting bias) | Unclear risk | Not clear |
| Other bias | Unclear risk | Not sure |