Inverse Ratio Ventilation on Bariatric Operation

Effects of a Changes in Inspiratory to Expiratory Ratio on Respiratory Mechanics and Oxygenation During Laparosopic Bariatric Surgery

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01922401

Enrollment

Registered

2013-08-14

Start date

2013-09-30

Completion date

2014-12-31

Last updated

2015-09-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypoxia

Brief summary

for evaluating inverse ratio ventilation of laparoscopic bariatric surgery

Detailed description

inverse ratio ventilation had been improve the oxygenation and respiratory mechanics during care of ARDS patients or during general anesthesia. We hypothized inverse ratio ventilatio could improve the oxygenation and respiratory mechanics on the obese patient also.

Interventions

OTHERinverse ratio ventilation

change the I: E ratio 1:2-1:1-2:1

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

PREVENTION

Masking

SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

20 Years to 65 Years

Healthy volunteers

Inclusion criteria

* ASA PS 1-2 obese patients(BMI\>30)

Exclusion criteria

* underlying cardiopulmonary diasease

Design outcomes

Primary

Measure	Time frame	Description
Arterial oxygenation (PaO2)	baseline PaO2-2hour after pneumoperitoneum	sampling for arterial blood from arterial cannular weill be analysed 10 min after anesthetic induction, 20 min after pneurmoperitoneum (PP)with 1:2 of IE ratio, 20 min after after pneurmoperitoneum (PP)with 1:1 of IE ratio, after pneurmoperitoneum (PP)with 2:1 of IE ratio and end of operation

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026