This is a prospective study of temporary gastric mucosal electrical stimulation (tGES) in 30 patients with gastroparesis (GP). After a 7 day baseline assessment of symptoms, subjects will have an endoscopically-placed tGES lead implanted into the mucosa of the antrum. This lead is connected to a thin wire that runs up the esophagus and out the nostril, similar to a nasojejunal feeding tube, although much thinner. It is then attached to a programmable battery pack which provides the desired level of stimulation. Patients will then be randomized to 7 days OFF or 7 days ON stimulation in a double-blind fashion. After 7 days, subjects will crossover to the other study arm (ie ON patients will be switched off; OFF patients will be switched on). Symptoms and QoL measures will be assessed at baseline, ON, and OFF periods. Serum ghrelin and other hormones, as well as EGG will be assayed after 6 days in each arm.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
30
The lead is a sterile, 2mm diameter insulated wire (Temporary Transvenous Pacing Lead 6416-200cm, Medtronic, Minneapolis, MN) with 2 electrodes on the distal end. The mucosal stimulation parameters(Current:10 mA; Frequency: 14Hz; Pulse width: 330 ms; Cycle ON: 0.1 s; Cycle OFF: 5 s) are within the range used for standard permanent implanted GES (Enterra therapy) within the serosa and muscle layers of the stomach, and which has been shown to be safe, without any tissue damage.
University of Calgary
Calgary, Alberta, Canada
Changes in patient symptoms during the ON and OFF periods of tGES stimulation.
Time frame: daily x 6 days in each phase of study (ON and OFF)
1. Changes in serum ghrelin and leptin between ON and OFF periods of tGES stimulation in GP patients. 2. Changes in gastric electrical activity between ON and OFF periods of tGES stimulation in GP patients
Time frame: Once during each study phase (ON and OFF)
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