The Effect of Ventilation Strategy on Arterial and Cerebral Oxygenation During Laparoscopic Bariatric Surgery

Jo, Youn Yi; Kim, Ji Young; Park, Chun Kon; Chang, Young Jin; Kwak, Hyun Jeong

doi:10.1007/s11695-015-1766-8

Cited by 16 publications

(23 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5,9,15,16,23–25 The included articles consisted of 4 randomized parallel-group trials, 5,9,15,25 2 randomized crossover trials, 16,24 and 1 nonrandomized single-group trial. 23 The characteristics of the included trials are presented in Table 1. All of the included articles compared 1:1 equal ratio ventilation (ERV) and 1:2 conventional ratio ventilation (CRV).…”

Section: Resultsmentioning

confidence: 99%

“…All of the included articles compared 1:1 equal ratio ventilation (ERV) and 1:2 conventional ratio ventilation (CRV). In crossover trials and a nonrandomized single-group trial, the time period of the application of each ratio was 20 23 or 30 16,24 minutes, and data collection for each ratio was thus established only once. In all of the included parallel-group trials, 5,9,15,25 data collection was conducted at 30 and 60 minutes after applying specific interventions such as OLV or laparoscopy according to the surgical procedures.…”

Section: Resultsmentioning

confidence: 99%

“…One enrolled trial comparing ERV and CRV measured cardiac output noninvasively, and no significant difference was observed between ERV and CRV. 15 Intraoperative oxygen indices, the primary outcomes in this meta-analysis, were provided as PaO 2 in most of the included articles, 9,15,16,23–25 except one article that presented PaO 2 /FiO 2 . 5 …”

Section: Resultsmentioning

confidence: 99%

“…One nonrandomized single group trial was considered to have a high risk of bias in random sequence generation, allocation concealment and blinding. 23 …”

Section: Resultsmentioning

confidence: 99%

“…All of the included articles contained comparisons of intraoperative oxygenation indices, including PaO 2 9,15,16,23–25 or PaO 2 /FiO 2 5 between the ratios. The overall analysis did not show any differences in intraoperative oxygenation (SMD 0.193, 95% confidence interval (CI) −0.094 to 0.481, P = 0.188, I 2 = 56.6%, D-L random), and publication bias was not suspected in Egger test ( P = 0.370).…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Effect of the Prolonged Inspiratory to Expiratory Ratio on Oxygenation and Respiratory Mechanics During Surgical Procedures

Park

Lee

Lee³

et al. 2016

Medicine

View full text Add to dashboard Cite

Prolonged inspiratory to expiratory (I:E) ratio ventilation has been researched to reduce lung injury and improve oxygenation in surgical patients with one-lung ventilation (OLV) or carbon dioxide (CO2) pneumoperitoneum.We aimed to confirm the efficacy of the 1:1 equal ratio ventilation (ERV) compared with the 1:2 conventional ratio ventilation (CRV) during surgical procedures.Electronic databases, including PubMed, Embase, Cochrane Central Register of Controlled Trials, Web of Science, and Google Scholar were searched.Prospective interventional trials that assessed the effects of prolonged I:E ratio of 1:1 during surgical procedures.Adult patients undergoing OLV or CO2 pneumoperitoneum as specific interventions depending on surgical procedures.The included studies were examined with the Cochrane Collaboration's tool. The data regarding intraoperative oxygenation and respiratory mechanics were extracted, and then pooled with standardized mean difference (SMD) using the method of Hedges.Seven trials (498 total patients, 274 with ERV) were included. From overall analysis, ERV did not improve oxygenation at 20 or 30 minutes after specific interventions (SMD 0.193, 95% confidence interval (CI): −0.094 to 0.481, P = 0.188). From subgroup analyses, ERV provided significantly improved oxygenation only with laparoscopy (SMD 0.425, 95% CI: 0.167–0.682, P = 0.001). At 60 minutes after the specific interventions, ERV improved oxygenation significantly in the overall analysis (SMD 0.447, 95% CI: 0.209–0.685, P < 0.001) as well as in the subgroup analyses with OLV (SMD 0.328, 95% CI: 0.011–0.644, P = 0.042) and laparoscopy (SMD 0.668, 95% CI: 0.052–1.285, P = 0.034). ERV provided lower peak airway pressure (Ppeak) and plateau airway pressure (Pplat) than CRV, regardless of the type of intervention.The relatively small number of the included articles and their heterogeneity could be the main limitations.ERV improved oxygenation at all of the assessment points during laparoscopy. In OLV, oxygenation improvement with ERV was observed 1 hour after application. ERV could be beneficial to reduce the Ppeak and Pplat.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…One nonrandomized single group trial was considered to have a high risk of bias in random sequence generation, allocation concealment and blinding. 23 …”

Section: Resultsmentioning

confidence: 99%