- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06115668
Individualized Positive End-Expiratory Pressure (PEEP) on Oxygenation, Hemodynamics, and Early Postoperative Atelectasis in Laparoscopic Bariatric Surgery
Effects of Individualized Positive End-Expiratory Pressure (PEEP) on Oxygenation, Hemodynamic Variables, and Incidence of Early Postoperative Atelectasis in Patients Undergoing Laparoscopic Bariatric Surgery: A Prospective Randomized Controlled Study
Study Overview
Status
Conditions
Detailed Description
Obesity is a major health problem, and the incidence is increasing worldwide. So far, the only treatment for morbid obesity with good long-term results is bariatric surgery.
Obese patients have unique respiratory physiology and ventilatory mechanics characteristics. Their lung function is impaired due to the reduction of oxygen reserve, functional residual capacity, and lung compliance. In addition, they frequently present with respiratory comorbidities, which increases the risk of developing postoperative pulmonary complications (PPCs) such as atelectasis especially after procedures under general anesthesia. Atelectasis has been hypothesized as a main cause of postoperative hypoxemia.
To reduce the incidence of atelectasis, positive end-expiratory pressure (PEEP) and recruitment maneuvers are used as a protective lung strategy to improve gas exchange and lung mechanics through reopening collapsed alveoli and maintaining the aeration of lungs. Application of PEEP may also eliminate auto-PEEP without increasing plateau pressure.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Heba Z Khattab, Master
- Phone Number: 00201004774825
- Email: hebazakaria194@gmail.com
Study Locations
-
-
El-Gharbia
-
Tanta, El-Gharbia, Egypt, 31527
- Recruiting
- Tanta University
-
Sub-Investigator:
- Shaimaa F Abdelkader, MD
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Contact:
- Heba Z Khattab
- Phone Number: 00201004774825
- Email: hebazakaria194@gmail.com
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Sub-Investigator:
- Ahmed M El-Sheikh, MD
-
Sub-Investigator:
- Mohamed A Barrima, MD
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Sub-Investigator:
- Laila A Al Ahwal, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Age from 21 to 60 years.
- Both sexes.
- American Society of Anesthesiologists (ASA) physical status class I-III
- Patients who are scheduled for elective laparoscopic bariatric surgery under general anesthesia.
Exclusion Criteria:
- Patients who are unwilling to participate in the study
- Actively smokers.
- Patients who had a history of Chronic obstructive pulmonary disease or bronchial asthma.
- Patients who are receiving renal replacement therapy prior to surgery.
- Patients who had a history of heart failure.
- Pregnant.
- Patients who have allergies to any drug used in the study.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Positive end-expiratory pressure 5 (PEEP 5)
Patients will receive fixed positive end-expiratory pressure(= 5 cmH2O) as a control group
|
Fixed positive end-expiratory pressure of 5 cmH2O will be maintained throughout the duration of surgery
|
Experimental: Individualized positive end-expiratory pressure (PEEPIND)
Patients who will receive the individualized positive end-expiratory pressure.
|
Patients will receive the individualized positive end-expiratory pressure.
Titration process will be started after establishment of pneumoperitoneum: setting the initial PEEP to 5 cmH2O, then increasing positive end-expiratory pressure (PEEP)according to the gradient of 2 cmH2O every 3 min, calculating static compliance (Cstat) according to the formula: [Cstat = VT/Pplat - PEEP] (Pplat = plateau pressure), then gradually increasing positive end-expiratory pressure , until the calculated Cstat shows a downward trend, set its previous PEEP (corresponding to PEEP for high Cstat) as the optimal PEEPIND for this patient.
The highest PEEP is limited to 20 cmH2O
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Intraoperative oxygenation
Time Frame: One hour after extubation
|
Intraoperative oxygenation which will be assessed by P/F ratio (the ratio of arterial oxygen partial pressure (PaO2 in mmHg) to fractional inspired oxygen (FiO2 expressed as a fraction, not a percentage). PaO2/FiO2: will be measured at before induction of anesthesia, immediately after intubation, after PEEP titration, one hour after pneumoperitoneum, before extubation, one hour after extubation |
One hour after extubation
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean arterial pressure(MAP)
Time Frame: One hour after extubation
|
Mean arterial pressure will be measured before induction of anesthesia, immediately after intubation, after positive End-Expiratory Pressure titration, one hour after pneumoperitoneum, before extubation, and one hour after extubation.
|
One hour after extubation
|
Heart rate(HR)
Time Frame: One hour after extubation
|
Heart rate will be measured before induction of anesthesia, immediately after intubation, after positive End-Expiratory Pressure titration, one hour after pneumoperitoneum, before extubation, and one hour after extubation.
|
One hour after extubation
|
Volume of total fluid infusion
Time Frame: Till the end of surgery
|
The total volume of the administered fluids will be recorded.
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Till the end of surgery
|
Dosage of vasopressors
Time Frame: Till the end of surgery
|
The total volume of the administered vasopressors will be recorded.
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Till the end of surgery
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Lung ultrasound scores
Time Frame: 12 hours postoperatively
|
Lung ultrasound scans will be performed 3 times for each patient, before induction of anesthesia, one hour after extubation and 12 hours postoperatively. Patients will be scanned in the supine position as follows: Each hemithorax will be divided into 6 regions using 3 longitudinal lines (parasternal, anterior, and posterior axillary) and 2 axial lines (one above the diaphragm and the other 1 cm above the nipples). The 12-lung regions will be scanned sequentially from right to left, cranial to caudal and anterior to posterior. Each region will be assessed using a 2-dimensional view with the probe placed parallel to the ribs. The degree of B-lines will be divided into 4 grades according to lung ultrasound score for consolidation and aeration and scored between 0 and 3: (0) fewer than 3 isolated B-lines.
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12 hours postoperatively
|
Early postoperative pulmonary complication
Time Frame: First 24 hours postoperatively
|
Any early postoperative pulmonary complication in the first postoperative 24 hours will be recorded.
|
First 24 hours postoperatively
|
Length of hospital stay
Time Frame: 28 days postoperatively
|
Time from admission till hospital discharge
|
28 days postoperatively
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 36131/11/22
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Access Criteria
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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