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Low Impact Laparoscopy In Bariatric Surgery

Low Impact Laparoscopy In Bariatric Surgery- A Monocentric Randomised Trial Comparing Low-Pressure Pneumoperitoneum Plus Microsurgery Versus Standard Laparoscopy

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07119437
Acronym
LILYBET
Enrollment
128
Registered
2025-08-13
Start date
2025-02-04
Completion date
2026-10-04
Last updated
2026-06-18

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

Conditions

Obesity, Morbid

Keywords

obesity, low impact laparoscopy, sleeve gastrectomy

Brief summary

The goal of this clinical trial is to learn if low pressure pneumoperitoneum and small incisions (low impact laparoscopy, LIL) works to reduce pain and improve pulmonary function in patients underwent to bariatric surgery. It will also learn about the safety and patients' satisfaction of the procedure. The main questions it aims to answer are: Does LIL lower post surgical pain and improve pulmonary function? Is LIL safe for obese patients? Researchers will compare LIL to standard laparoscopy performing sleeve gastrectomy in patients with obesity. Participants will: be randomised to LIL group or standard laparoscopy. After the operation the researchers will evaluate the pain and the efficiency of lung ventilation at pre-established intervals. after 3 months the patients will complete a questionnaire on aesthetic satisfaction and overall satisfaction.

Interventions

PROCEDURElow pneumoperitoneum laparoscopy with microsurgery

Use of low pressure for pneumoperitoneum (8-10 mmHg) and mini surgical access for bariatric procedure (sleeve gastrectomy).

Standard laparoscopy (12-14 mmHg) and normal surgical access for bariatric procedures (sleeve gastrectomy).

Sponsors

Fondazione Policlinico Universitario Campus Bio-Medico
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Age between 18 years-old and 65 years-old * BMI (Body Mass Index) \>35 Kg/m2 and \< 45 Kg/m2; * Patients candidate to sleeve gastrectomy

Exclusion criteria

* Patients with neurological and/or psychiatric disorders * Patients with Chronic Pain Syndrome * Patients with a history of surgical procedures using a laparotomic approach in the upper abdominal quadrants

Design outcomes

Primary

MeasureTime frameDescription
POST OPERATIVE PAINFROM THE ENTER IN PACU TO 36 HOURS POST- SURGERYPost-operative pain (AS REST PAIN AND MOVIMENT PAIN) will be assessed using the Numeric Pain Rating Scale (NRS), which rates pain from 0 to 10. 0 is defined as no pain, while 10 represents the maximum pain. 0 is the best result, 10 the worst. The questionnaire will be administered in the PACU and at 6, 12, 24, and 36 hours after the end of the procedure.
Pulmonary performancefrom surgery to 24 hours post-surgeryEfficiency of ventilation will be evaluated recording the values of Maximum Inspiratory Pressure (MIP), maximum expiratory pressure (MEP), Peak expiratory flow (PEF)

Secondary

MeasureTime frameDescription
USE OF Analgesicsfrom surgery to 36 hours post-surgeryComparison of analgesic use between the two groups during post-operative recovery
operative timefrom the surgical incision to the last skin stitchComparison of opertive time between the two groups
Rate of conversion to standard laparoscopyfrom the beginning of surgery to the end of surgeryRecord the number of cases in the operative group where conversion to a standard laparoscopic approach was necessary, with pressure values \> 10 mmHg for more than 20% of the duration of the procedure. Also analyzing the results for BMI subgroups.
Rate of laparotomy conversionfrom the beginning of surgery to the end of surgeryNumber of cases in which the surgical procedure had to be converted from laparoscopy to an open approach.
Ambulation TimeFrom the end of surgery up to 24 hours post-surgeryComparison of mobilization time between the two groups
The time to first flatusFrom the end of surgery up to 48 hours post-surgeryCompare the time to intestinal motility recovery between the two groups.
Liver Functionfirst and second post-operative dayComparison between the two groups of liver function tests that include alanine transaminase (ALT, Normal values 0-55 U/L) , aspartate transaminase (AST, normal values 5-34 U/L), alkaline phosphatase (ALP normal values 53-141 U/L) and gamma-glutamyl transferase (GGT, normal values 8-33 U/L).
Post-operative hospital stayfrom the day of surgery up to 30 daysPost-operative hospital stay
Postoperative complicationsfrom surgery to 30 days after surgeryAll postoperative complications
First Operator Comfortduring surgeryEvaluate the comfort of the operating surgeon related to the adequate exposure of the surgical field during the procedure using a 5-point surgical rating scale for laparoscopic surgical workspace. The scale ranges from 1 to 5, where 1 corresponds to the worst possible outcome, while 5 represents the best possible outcome.
Aesthetic satisfactionfrom surgery to 3-month post surgeryEvaluate the degree of aesthetic and overall satisfaction of patients by administering to them, 3 months after the intervention, the Patient Scar Assessment Scale (PSAS), a validated tool for scar assessment, and the Ultimate Question (UQ), related to overall satisfaction. These tests are administered together and the patient, who responds to 8 different items, assigning a score from 1 to 10. The maximum test score is 80, indicating the highest satisfaction, while the minimum score is 8, corresponding to the worst possible outcome.

Countries

Italy

Contacts

CONTACTVincenzo Bruni
v.bruni@policlinicocampus.it+39 3484064965
CONTACTIda Francesca Gallo
i.gallo@policlinicocampus.it+393926237399

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 19, 2026