Safety and Efficacy of a New Smartphone-controlled Vibrating Capsule on Defecation in Beagles

Capsules for the Diagnosis and Treatment of Gastrointestinal Motility Disorders- A Game Changer

PURPOSE OF REVIEW

Over the last few decades, there have been remarkable strides in endoscopy and radiological imaging that have advanced gastroenterology. However, the management of neurogastroenterological disorders has lagged behind, in part handicapped by the use of catheter-based manometry that is both non-physiological and uncomfortable. The advent of capsule technology has been a game changer for both diagnostic and therapeutic applications.

RECENT FINDINGS

Here, we discuss several capsule devices that are available or under investigation. There are three technologies that are FDA approved. Wireless motility capsule measures pH and pressure and provides clinically impactful information regarding gastric, small intestine and colonic transit, without radiation that has been demonstrated to guide management of gastroparesis, dyspepsia and constipation. Wireless ambulatory pH monitoring capsule is currently the gold standard for assessing gastroesophageal acid reflux. In the therapeutics arena, an orally ingested vibrating capsule has been recently FDA approved for the treatment of chronic constipation, supported by a robust phase 3 clinical trial which showed significant improvement in constipation symptoms and quality of life. There are several capsules currently under investigation. Smart capsule bacterial detection system and Capscan® are capsules that can sample fluid in the small or large bowel and provide microbiome analysis for detection of small intestinal bacterial (SIBO) or fungal overgrowth (SIFO). Another investigational gas sensing capsule analyzing hydrogen, CO2, volatile fatty acids and capsule orientation, can measure regional gut transit time and luminal gas concentrations and assess gastroparesis, constipation or SIBO. Therapeutically, other vibrating capsules are in development. Innovations in capsule technology are poised to transform our ability to investigate gut function physiologically, and non-invasively deliver targeted treatment(s), thereby providing both accurate diagnostic information and luminally-directed, safe therapy.

Vibrating colon-stimulating capsule to treat chronic constipation: A systematic review

In August 2022, the United States Food and Drug Administration issued marketing authorization for an orally administered vibrating colon-stimulating capsule for treating chronic idiopathic constipation. We aimed to review the literature systematically and synthesize evidence on the role of the vibrating capsule in chronic idiopathic constipation. A comprehensive search was conducted on PubMed, Embase, International Clinical Trials Registry Platform (World Health Organization), Cochrane Library databases, and two pre-print servers (medRxiv.org and Research Square) until 31 December 2022, to identify published pre-clinical and clinical original studies evaluating the role of the vibrating capsule in patients with chronic constipation. The studies were critically analyzed, and data were extracted. We identified thirty-three articles and five studies (one pre-clinical, one combined, and three clinical). The pre-clinical studies in dogs revealed no adverse effects of the vibrating capsule. In the clinical studies, there were significant findings observed. The number of spontaneous bowel movements per week and the proportion of patients experiencing an increase of at least one complete spontaneous bowel movement per week were both significantly higher in the group receiving the vibrating capsule compared to the group receiving the sham capsule. No treatment-related serious adverse event was noted. The mild adverse events were vibration sensation, diarrhea, and abdominal discomfort. The efficacy and safety profiles of the vibrating colon-stimulating capsule in treating patients with chronic constipation are promising. However, more robust evidence is required by conducting large randomized clinical trials before conclusively determining its wider use.

Efficacy and safety of vibrating capsule for functional constipation (VICONS): A randomised, double-blind, placebo-controlled, multicenter trial

BACKGROUND

Functional constipation (FC) is an intractable disease that carries large financial burden as well as emotional and physical stress. We aimed to assess the efficacy and safety of the newly developed smartphone-controlled vibrating capsule (VC) in patients with FC.

METHODS

From December 2018 to February 2020, we did a multicenter, blinded, placebo-controlled randomised trial in six top general hospitals in China focusing on patients aged 18 to 80 with FC. Patients were randomly assigned in a 1:1 ratio to receive VCs or placebo treatment for six weeks (two capsules per week) after a two-week baseline period. The primary outcome was the responder rate, defined as the proportion of patients with an increase of at least one complete spontaneous bowel movement (CSBM) per week during treatment compared to baseline in the full analysis set. This trial is registered with ClinicalTrials.gov, number NCT04671264, and is completed.

FINDINGS

107 patients aged from 18 to 74 were randomly assigned to receive VC (n = 53) or placebo treatment (n = 54). The responder rate in the VC group was significantly higher than that in the placebo group (64·2% vs. 35·8%; difference, 27·7% [95% CI, 10·4-45·1]; P = 0·005). More patients in the VC group reported weekly CSBMs ≥ 1 for at least four weeks during treatment (difference, 22·7% [95% CI, 8-46]; P = 0·022) and follow-up period (difference, 17.3% [95% CI, 0-35]; P = 0·048). The mean Patient Assessment of Constipation-Symptoms score and Patient Assessment of Constipation-Quality of Life score differed significantly from the baseline in both groups (all P < 0·0001). The most common adverse event associated with VC was abdominal discomfort (3·7%).

INTERPRETATION

VCs can promote defecation, as well as ameliorating symptoms and improving the quality of life in patients with FC with sustained efficacy. VC appears to be a potential alternative physical treatment for FC with the exact mechanism and parameters warranting further investigation.

FUNDING

The study was supported by "One hundred leading scientists for 21st century" of Health Department of Shanghai Municipal Government (to ZL, No.2017BR005).