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Optimizing respiratory function in obese laparoscopic bariatric surgery: the role of positive end-expiratory pressure

Role of positive end-expiratory pressure on respiratory mechanics and gas exchange in obese patients undergoing laparoscopic bariatric surgery

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN91065944
Enrollment
45
Registered
2023-11-28
Start date
2023-12-01
Completion date
Unknown
Last updated
2023-12-12

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

Conditions

Morbid obesity Nutritional, Metabolic, Endocrine

Interventions

Adult patients with morbid obesity (BMI = 40 kg/m2 or BMI = 35 kg/m2 with comorbidities) scheduled for laparoscopic sleeve gastrectomy will be considered for the study. Patients will be classified as

Sponsors

University Medical Hospital of Padova
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Aged 18 years old and over 2. Morbid obesity (BMI = 40 kg/m2 or BMI = 35 kg/m2 with comorbidities) 3. Laparoscopic sleeve gastrectomy surgery

Exclusion criteria

Exclusion criteria: 1. Severe acute and/or chronic respiratory disease (e.g., asthma, COPD, severe restrictive disease) 2. Severe acute and/or chronic heart disease (e.g., acute or recent myocardial infarction, inducible ischemia, heart failure) 3. End-stage liver and kidney disease 4. Intolerance or allergy or contraindications to the drugs used

Design outcomes

Primary

MeasureTime frame
The effect of different positive end-expiratory pressure (PEEP) setting regimens on intra-operative oxygenation measured using the PaO2/FiO2 ratio of arterial oxygen partial pressure [PaO2 in mmHg] to fractional inspired oxygen [FiO2 expressed as a fraction, not a percentage]. Parameters are monitored in a standard manner for general anesthesia.

Secondary

MeasureTime frame
The following secondary respiratory and cardiovascular variables are measured during the intraoperative time points: pre-peritoneum, during pneumoperitoneum, and after pneumoperitoneum. Parameters are monitored in a standard manner for general anesthesia: 1. Respiratory variables: Peak Inspiratory Pressure (cmH2O), Plateau Pressure (cmH2O), Positive End-Expiratory Pressure (PEEP) (cmH2O), Elastance (cmH2O/l), Compliance (ml/cmH2O), Inspiratory Flow (L/min), Respiratory Rate (breaths/min), Driving Pressure (cmH2O), Mechanical Power, Arterial Oxygen Saturation measured by Pulse Oximetry (SpO2) (%), Arterial Partial Pressure of Oxygen (PaO2) (mmHg), Arterial Partial Pressure of Carbon Dioxide (PaCO2) (mmHg), Arterial pH 2. Cardiovascular variables: Systolic Blood Pressure (mmHg), Diastolic Blood Pressure (mmHg), Heart Rate (bpm) The following secondary post-anesthesia phase and ward discharge variables are measured at the following postoperative time points: 0, 15, 30, 60, 90, and 120 minutes after tracheal extubation, and 6, 24, 48, and 72 hours after surgery: 1. Pain intensity measured using a Numeric Rating Scale (NRS 0-10) 2. Intensity of nausea and/or vomiting measured using the NRS 0-10 3. Postoperative pulmonary complications (POPCs)

Countries

Italy

Contacts

Public ContactMichele Carron
michele.carron@unipd.it+0498213090-91

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026