Comparing warm humidified CO2 and dry CO2 for pain management in bariatric surgery

Lexion AP 50/30 Warmed Humidified Real Time CO2 Insufflation vs Airseal Recirculated CO2/Air Insufflation in Minimally Invasive Bariatric (Gastric Bypass) Surgery: A Randomized Controlled Study of Clinical Evaluation

Not applicable Interventional The University of Texas Health Science Center, Houston · NCT05838300

This study is testing if using warm, humidified carbon dioxide during bariatric surgery can help reduce pain and the need for pain medication afterward.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment54 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorThe University of Texas Health Science Center, Houston Academic / other
Locations1 site (Houston, Texas)
Trial IDNCT05838300 on ClinicalTrials.gov

What this trial studies

This study aims to evaluate the impact of warm and humidified carbon dioxide (CO2) on postoperative pain and analgesia requirements in patients undergoing laparoscopic bariatric surgery. Participants will be randomly assigned to receive either warm humidified CO2 or dry CO2 during their procedure. The primary focus is to assess whether the use of warm humidified CO2 can lead to reduced pain levels and lower the need for pain medication post-surgery. The study will include elective bariatric primary or revision procedures and hiatal hernia repairs.

Who should consider this trial

Good fit: Ideal candidates include adults undergoing elective primary or revision bariatric surgery or hiatal hernia repair.

Not a fit: Patients who are undergoing emergency surgery, have a history of narcotics addiction, or have conditions that impair their ability to consent or understand the procedure may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce postoperative pain and the need for analgesics in bariatric surgery patients.

How similar studies have performed: While the use of warm humidified CO2 in surgical settings is promising, this specific approach in bariatric surgery is relatively novel and has not been extensively tested in prior studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* elective bariatric primary or revision procedures and hiatal hernia repair procedures for all indications.

Exclusion Criteria:

* emergency surgery, reoperation within 30 days
* patients who are taking pain medications (narcotics) daily preoperatively for whatever reason
* history of narcotics addiction
* paraplegic and quadriplegic patients
* dementia or altered mental status
* patients on steroids
* pregnant women
* psychiatric patients
* minors
* unable to give informed consent

Where this trial is running

Houston, Texas

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Bariatric Surgerycarbon dioxideminimally invasive surgery
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.