Effect of Vibrant Capsule on Gastric Emptying and Antropyloroduodenal Motility in Healthy Volunteers

Not Applicable

Completed

Conditions: Gastroparesis

Interventions: Device: Vibrant Capsule (3 vibration)
Device: Sham vibrating capsule
Device: Vibrant Capsule (1 vibration)
Device: Vibrant Capsule (5 vibration)

Registration Number: NCT02736799

Lead Sponsor: Vibrant Ltd.

Brief Summary: The Vibrant capsule is a novel vibrating device for the treatment of gastrointestinal disorders. The effect of different vibrations on the motor functions of the gastrointestinal tract are unclear. The study will focus on the stomach in healthy volunteers.

The study will compare the effects of Vibrant capsule treatment and Sham capsule treatment on gastric emptying and gastric motility in healthy volunteers.

Detailed Description: Healthy volunteers participants were randomized to one of 4 treatment groups: sham VIBRANT or vibrating VIBRANT capsule at rates of 1, 3 or 5 per minute. The studies were conducted in one day.

Following an overnight fast, participants underwent introduction of the multilumen manometric catheter into the proximal small intestine with sensors across the antroduodenal junction. A 4-meter Teflon® (green) guidewire and manometry tube were placed transnasally and advanced into the duodenum with the distal end of the manometry tube within the distal duodenum or proximal jejunum.

Following placement of the manometry tube a 30 minute baseline motility assessment was performed followed by the first of two VIBRANT OR SHAM VIBRANT CAPSULES administered as randomly assigned. Motility assessment performed for an additional 25-30 minutes before the digestion of the standardized breakfast test meal. A single spot image will be obtained to document the location of the capsule prior to the meal.

Approximately thirty minutes following ingestion of the capsule, participants ingested a standardized breakfast meal (320kcal egg, toast, milk) containing 99mTc. Anterior and posterior gamma camera images obtained immediately following ingestion of the meal and every 15 minutes until 240 minutes. In addition, every 30 minutes one hundred millimeter Visual analog scales (VAS) recorded to assess levels of nausea, fullness, gas, and abdominal pain.

Participants were seated in a semi-recumbent position (\~45 degrees) for recording motility and obtaining anterior scintigraphy images simultaneously. Following the 90-minute scan, the participants ingested a second active VIBRANT or sham capsule. Subsequent scans continued at scheduled intervals until 240 minutes after the test meal ingestion to complete the assessment of gastric emptying.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 24

Inclusion Criteria

Able to provide written informed consent prior to any study procedures, and be willing and able to comply with study procedures
No medical problems or chronic diseases, specifically, no type 2 diabetes mellitus
Body mass index of 18-35 kg/m2
Female subjects must have negative urine pregnancy tests and must not be lactating prior to receiving study medication and radiation exposure. For females able to bear children, a hormonal (i.e., oral, implantable, or injectable) and single-barrier method, or a double-barrier method of birth control must be used throughout the study. Female subjects unable to bear children must have this documented in the medical record [i.e., tubal ligation, hysterectomy, or post-menopausal (defined as a minimum of one year since the last menstrual period)].

Exclusion Criteria

Unable or unwilling to provide informed consent or to comply with study procedures
Diagnosis of gastrointestinal diseases
Structural or metabolic diseases that affect the gastrointestinal system
Unable to avoid the following over-the-counter medications 48 hours prior to the baseline period and throughout the study:
1. Medications that alter gastrointestinal transit including laxatives, magnesium and aluminum containing antacids, prokinetics, erythromycin
2. Analgesic drugs including Nonsteroidal Anti-Inflammatory Drugs and COX-2 inhibitors NOTE: stable doses of thyroid replacement, estrogen replacement, low-dose aspirin for cardioprotection, and birth control (but with adequate backup contraception as drug-interactions with birth control have not been conducted) are permissible.
History of recent surgery (within 60 days of screening)
Acute or chronic illness or history of illness which, in the opinion of the investigator, could pose a threat or harm to the subject or obscure interpretation of laboratory test results or interpretation of study data, such as frequent angina, Class III or IV congestive heart failure, moderate impairment of renal or hepatic function, poorly controlled diabetes, etc.
Any clinically significant abnormalities on physical examination or laboratory abnormalities identified in the medical record, as determined by the investigator
Acute gastrointestinal illness within 48 hours of initiation of the baseline period
Females who are pregnant or breastfeeding
History of excessive alcohol use or substance abuse
Participation in an investigational study within the 30 days prior to dosing in the present study
Any other reason, which in the opinion of the investigator, would confound proper interpretation of the study

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Vibrant Capsule (3 vibration)	Vibrant Capsule (3 vibration)	3 vibrations/min
Sham vibrating capsule	Sham vibrating capsule	Sham vibrating capsule
Vibrant Capsule (1 vibration)	Vibrant Capsule (1 vibration)	1 vibration/min
Vibrant Capsule (5 vibration)	Vibrant Capsule (5 vibration)	5 vibrations/min

Primary Outcome Measures

Name	Time	Method
Gastric Emptying of Solids - T1/2	4 hours	The median solid gastric emptying half-time in minutes from the stomach after a mixed meal as measured by scintigraphy. Approximately thirty minutes following ingestion of the Vibarnt / sham capsule, subjects ingested a standardized breakfast meal (320kcal egg, toast, milk) containing 99mTc. Anterior and posterior gamma camera images were obtained immediately following ingestion of the meal and every 15 minutes until 240 minutes.
Gastroduodenal Manometry Measurement	1 hour	The main outcome measure is the Gastro-duodenal manometry measurement of the first hour postprandial distal antral motility index (MI), which is calculated as: MI = loge (sum of amplitude x number of contractions + 1) every 15 minutes following postcibal period (60 min). Effect size is the difference between means as a percentage of the mean index between the treatment groups. Estimated effect sizes are based on a paired t-test with the expected difference in mean of 1.6 motility index units in distal antral activity or 13.6% change in the antral motility index in ACTIVE compared to SHAM. It is to be noted that this is on a logarithmic scale and, therefore, a 10% change constitutes a clinically relevant difference. A higher MI value represents a better outcome.

Secondary Outcome Measures

Name	Time	Method
Gastric Emptying at Two Hours	2 hours	Gastric emptying scintigraphy (GES) is the 'gold standard' measurement for assessing stomach emptying rate. Stomach emptying was measured following ingestion of a standardized breakfast meal (320kcal egg, toast, milk) containing 99mTc. Anterior and posterior gamma camera images were obtained immediately following ingestion of the meal and every 15 minutes until 240 minutes. The outcome of GES at two hours is measuring the rate of solid emptying from the stomach after two hours in each of the study arms. A higher Fraction of solids emptying represents faster stomach emptying.
Postprandial Distal Antral Motility Index	30 minutes	First 0.5h postprandial distal antral motility index (Gastroduodenal Motility index (MI) MI formula: MI = loge (sum of amplitude x number of contractions + 1). Effect size is the difference between means as a percentage of the mean index between the treatment groups. Estimated effect sizes are based on a paired t-test with expected difference in mean of 1.6 motility index units in distal antral activity or 13.6% change in the antral motility index in ACTIVE compared to SHAM. It is to be noted that this is on a logarithmic scale and, therefore, an 10% change constitutes a clinically relevant difference. A higher MI value represents a better outcome.
Gastric Emptying at One Hour	1 hour	Gastric emptying scintigraphy (GES) is the 'gold standard' measurement for assessing stomach emptying rate. Stomach emptying was measured following ingestion of a standardized breakfast meal (320kcal egg, toast, milk) containing 99mTc. Anterior and posterior gamma camera images were obtained immediately following ingestion of the meal and every 15 minutes until 240 minutes. The outcome of GES at one hour is measuring the rate of solid emptying from the stomach after one hour in each of the study arms. A higher Fraction of solids emptying represents faster stomach emptying.