Intraop Ventilation Management and Postop Pulmonary Complications in High Risk Patients for OSA

Ohio State University (Other)
Overall Status
Recruiting ID

Study Details

Study Description

Brief Summary

Lung protective ventilation (LPV) has been proposed to reduce the incidence of postoperative pulmonary complications (PPCs), and protect against ventilator induced lung injury (VILI).

Condition or Disease Intervention/Treatment Phase

    Detailed Description

    LPV was first introduced in the intensive care units but has been recently adopted in the operating rooms. Obstructive sleep apnea (OSA) is a widely prevalent condition in obese patients and requires special attention in the operating room. Screening for OSA risk in surgical patients is a common practice. The STOP-BANG questionnaire is a common screening tool for OSA (Snoring, Tiredness, Observed apnea, high blood Pressure, BMI, Age, Neck circumference, and male Gender). The American Society of Anesthesiologists practice guidelines for the perioperative management of patients with OSA do not recommend any specific ventilation strategy to prevent PPCs in this population. To the knowledge of the investigators, the association between intraoperative ventilation strategies and PPCs in laparoscopic bariatric surgery patients, who have a high STOP-BANG score, has not been adequately investigated. The investigators propose a retrospective chart review of patients, 18 years of age and older, who underwent laparoscopic bariatric surgery, in reverse Trendelenburg position, using pressure controlled ventilation (PCV/PCV-VG) at the Ohio State University Wexner Medical Center, between January 01, 2012 and November 22, 2016, to determine whether intraoperative driving pressure is a predictor of postoperative pulmonary complications. No procedures will be done for the sake of conducting this study except for a retrospective review of patient charts. Preoperative and intraoperative variables will be collected to determine their predictive value of postoperative complications. No risks to the patients' health or well being are anticipated due to the conduct of the proposed study. No immediate benefits to the patients from whom data was collected is anticipated either. Results obtained from this study may provide valuable information on the preferred ventilation strategies in the operating room for future patients who have a high risk of postoperative lung complications.

    Study Design

    Study Type:
    Anticipated Enrollment :
    2636 participants
    Observational Model:
    Time Perspective:
    Official Title:
    Intraoperative Ventilation Management and Postoperative Pulmonary Complications in Patients at High Risk for Obstructive Sleep Apnea
    Actual Study Start Date :
    Mar 18, 2017
    Anticipated Primary Completion Date :
    Dec 31, 2022
    Anticipated Study Completion Date :
    Dec 31, 2022

    Arms and Interventions

    Arm Intervention/Treatment
    Patients at High Risk for OSA

    Patients at High Risk for Obstructive Sleep Apnea Undergoing Laparoscopic Bariatric Surgery; retrospective study, no intervention administered.

    Outcome Measures

    Primary Outcome Measures

    1. Post-Operative Pulmonary Complications [After surgery until 30 days]

      Incidence of any post-operative pulmonary complications up to 30 days after surgery in patients at high risk for OSA undergoing laparoscopic bariatric surgery

    Eligibility Criteria


    Ages Eligible for Study:
    18 Years and Older
    Sexes Eligible for Study:
    Accepts Healthy Volunteers:
    Inclusion Criteria:
    • Male or Female

    • Age ≥ 18 y/o

    • Patients who underwent laparoscopic bariatric surgery

    • Surgery under general anesthesia with endotracheal intubation and pressure controlled mode of ventilation (PCV or PCV-VG)

    Exclusion Criteria:
    • Pregnant females, prisoners

    • Short procedures: time of mechanical ventilation < 60 minutes

    • Patients who received volume controlled ventilation (VCV) mode

    • Patients with past medical history of neuromuscular illnesses, pulmonary hypertension or CHF

    Contacts and Locations


    Site City State Country Postal Code
    1 The Ohio State University Wexner Medical Center Columbus Ohio United States 43210

    Sponsors and Collaborators

    • Ohio State University


    • Principal Investigator: Samuel Lindsey, MD, The Ohio State University Wexner Medical Center

    Study Documents (Full-Text)

    None provided.

    More Information


    None provided.
    Responsible Party:
    Samuel Lindsey, Assistant Professor of Clinical Anesthesiology, Ohio State University Identifier:
    Other Study ID Numbers:
    • 2016H0423
    First Posted:
    May 1, 2017
    Last Update Posted:
    Jan 6, 2022
    Last Verified:
    Jan 1, 2022
    Individual Participant Data (IPD) Sharing Statement:
    Plan to Share IPD:
    Studies a U.S. FDA-regulated Drug Product:
    Studies a U.S. FDA-regulated Device Product:
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Jan 6, 2022