Study is not feasible at this time due to staffing limitations

The purpose of this research is to determine if an investigational device called the 13C-Spirulina Gastric Emptying Breath Test (GEBT), can accurately diagnose gastroparesis (delayed emptying of the stomach) in patients with Cystic Fibrosis (CF).

Inclusion Criteria:

• Patients age 4 years* and above with a genetically confirmed diagnosis of CF (*This age was chosen as patients younger than 4 years rarely undergo GES)
• Actively being followed at the University of Miami CF Center (i.e. seen within the past 5 years at a University of Miami pediatric or adult pulmonology clinic)

Exclusion Criteria:

• History of abdominal surgeries involving gastrointestinal luminal resection (i.e. small bowel or colonic resection that increases risk of post-operative strictures or narrowing of the lumen). Nissen fundoplication, gastrostomy tube placement, gynecologic surgeries, appendectomy, and/or cholecystectomy are not excluded.
• Gastrointestinal comorbidities that impact absorption such as Inflammatory Bowel Disease and Celiac Disease
• Known hypersensitivity to Spirulina, egg, milk or wheat allergens
• Patients not able to consume at least 50% of a standard test meal
• Pregnant women
• Adults unable to consent
• Prisoners