Vagal Nerve Blockade (vBloc)
An implantable device therapy that intermittently blocks hunger signals between the brain and stomach.
Plain English
Patient-Friendly Explanation
Vagal nerve blockade, also called vBloc therapy, uses a small implanted device to send intermittent electrical signals to the vagus nerve — the main nerve connecting your brain and digestive system. This temporarily blocks hunger signals and helps you feel full on smaller portions.
Medical
Clinical Definition
Vagal nerve blockade (vBloc) is a device-based neuromodulation therapy for obesity involving laparoscopic implantation of electrodes around the intra-abdominal vagal trunks connected to a subcutaneous pulse generator. The device delivers high-frequency, low-energy electrical impulses that intermittently block vagal afferent and efferent signalling, reducing hunger sensations and promoting early satiety. In clinical trials, vBloc achieved approximately 8–10% excess weight loss.
Key Insight
Why It Matters
vBloc represents a device-based, reversible approach that does not alter gastrointestinal anatomy. Accord Medical Clinic evaluates the full spectrum of weight management options — from lifestyle to medications to procedures — to match each patient with the right solution.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.
