Plain English Summary
Background and study aims
Use of intra-gastric balloons is common to treat obesity but these devices have limitations such as the need for endoscopy and anaesthesia. This study will assess the safety and efficacy (short and long term) of a new, really non-invasive, intra-gastric balloon called the Obalon Gastric Balloon (OGB).
Who can participate?
The study aims to recruit about 100 men and about 100 women that are overweight and obese patients, over 18 years old, in the Obesity Centre of Excellence of the Policlinico Umberto I General Hospital, Rome (Italy).
What does the study involve?
The OGB is a new balloon to be swallowed and then remotely inflated with 250cc nitrogen, without endoscopy or anaesthesia. Additional OGBs will be added according to weight loss and patients compliance. After the three-month treatment period, all balloons will be retrieved during an upper endoscopy, under no or conscious sedation.
Participants will swallow a capsule attached to a micro catheter; the balloon is inside the capsule. Once in the stomach, the balloon will be inflated with gas using the micro catheter; the micro catheter is then detached and removed, leaving the balloon behind.
What are the possible benefits and risks of participating?
Obalon is a non-surgical and fully reversible device with a strong safety profile (very low risk for the patient). It will provide a clinically meaningful weight loss. It is easy to repeat the Obalon therapy as needed. It is affordable.
Risks: not specified at time of registration
Where is the study run from?
The study has been set up by the Sapienza University of Rome (Italy) and is run from the Obesity Centre of Excellence of the Policlinico Umberto I General Hospital, Rome (Italy).
When is study starting and how long is it expected to run for?
It is anticipated that recruitment will start mid-2013. Participants will be enrolled on the study for a period of two years. However, the study will extend beyond this as we intend to look at participants health over many years to evaluate the weight and obesity comorbidities.
Who is funding the study?
No external funding will be provided for this study. The costs of the devices will be covered by the Italian National Health System, as part of the normal obesity management.
Who is the main contact?
Prof. Alfredo Genco
Study on a non-invasive swallowable device for weight loss and obesity-related comorbidities in overweight and obese patients
A minimally invasive swallowable intragastric balloon could be better for patients than other available devices in terms of placement discomfort (the device do not require endoscopy to be placed) and post-placement symptoms. In the meantime, it should be effective as the other commercially available intragastric balloons in short and long term (on weight and comorbidities) and safe (adverse events).
The study is under evaluation of the internal general hospital ethical committee.
Single center, interventional clinical trial (single arm)
Primary study design
Secondary study design
Non randomised controlled trial
Patient information sheet
Not available in web format, please use the contact details below to request a patient information sheet
A new intragastric balloon, Obalon® Gastric Balloons (OGB) (ObalonTherapeutics, Inc., Carlsbad, San Diego, California) will be inserted. Obalon is a gas-filled balloon with a maximal volume of 250 ml. It is compressed, folded, and fitted in a gelatin capsule. The balloon contains a self-sealing valve connected to a thin catheter. The Obalon is a non-surgical and fully reversible device with a strong safety profile (very low risk for the patient). It will provide a clinically meaningful weight loss. It is easy to repeat the 'Obalon therapy' as needed.
The OGB is swallowed and then remotely inflated with nitrogen 250cc, without endoscopy and/or anesthesia. Once the capsule is ingested, the catheter extends from the stomach to outside the body through the esophagus and the mouth. Fluoroscopy is used to verify that the capsule has entered the stomach. The catheter is attached to the balloon for remote inflation using a gas-filled canister. After balloon inflation, the catheter is detached and removed. Additional OGB balloons are added according to weight loss progression, patient symptoms, compliance to diet and perception of early satiety. After the three-month treatment period, all balloons will be retrieved during an upper endoscopy, under conscious sedation, using standard, commercially available endoscopic tools.
Primary outcome measures
Weight loss parameters: Body Mass Index (BMI), Excess Weight Loss (EWL) percentage, weight loss (WL percentage. They will be evaluated at baseline, three months and follow-up.
Secondary outcome measures
1. Pain and post placement discomfort, measured using the Visual Analogue Scale (VAS) score (0 = no pain, 10 = unbearable pain) at baseline, three months and follow-up
2. Changes in comorbidities - diabetes type 2 : measured by fasting glycemia, Hb1ac
3. Changes in comorbidities - hypertension: measured by changes in pharmacological therapy, systolic and diastolic pressure
4. Changes in comorbidities - obstructive sleep apnea syndrome (OSAS): measured by changes in pharmacological therapy (if present), apnea/hypopnea index and oxygen saturation, changes in oxygen therapy (C-PAP) if present
Overall trial start date
Overall trial end date
Participant inclusion criteria
1. Obese (BMI > 30) and overweight (BMI > 27) patients
2. Both male and female
3. Aged over 18 years
Target number of participants
Participant exclusion criteria
1. Anatomical abnormalities of the upper gastrointestinal (GI) tract
2. Functional disorders of the upper GI tract
3. Inflammatory and other pathophysiological conditions of the GI tract
4. Chronic or acute use of medications known to affect integrity of the GI tract and/or weight
5. Prior GI tract surgeries excluding uncomplicated appendectomies
6. Untreated hypothyroidism or untreated Cushings disease or syndrome
7. Severe, unstable/uncontrolled medical conditions of major organ systems
8. Alcohol and/or illicit drugs abuse
9. Undergoing chronic steroid or immunosuppressive therapy
10. Pregnant or breastfeeding or intention of becoming pregnant during the study
11. Have type 1 diabetes mellitus
12. Must not undertake scuba diving or travel in an unpressurized airplane cabin
13. Known allergies to products/foods of porcine origin
14. Untreated Heliocobacter pylori infection
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
Surgical Sciences Department
The Italian National Health Service (INHS) (Italy) - as part of the normal obesity management
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Not provided at time of registration
Intention to publish date
Participant level data
Not provided at time of registration
Results - basic reporting