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Ask Nurse Lynn: Digestion and Vasovagal Episodes

Question:

Female, 40 years old, unknown subtype

My sister has digestive episodes (severe constipation and now vomiting which she didn’t do as child) which usually result in vasovagal episodes and her complaining of side and chest pain. Nothing hospitals can do but how should my parents better manage her diet?

Nurse Lynn’s Response:

Digestive issues, including severe constipation, are common in individuals with Prader-Willi Syndrome (PWS) due to hypotonia, slower gut motility, and challenges with satiety regulation. These symptoms can sometimes trigger vasovagal episodes and associated pain, as you’ve described. Vomiting can occur but this is less common. Vomiting in a person with PWS should always be taken seriously. If it is accompanied by severe pain, bloating, or fever, seek immediate medical care to rule out complications like bowel obstruction or gastric rupture.

  1. Increase Fiber Intake: Focus on higher-fiber foods, such as vegetables, fruits (in controlled portions due to sugar content), whole grains, and legumes. A sudden increase in fiber intake can lead to bloating and discomfort, so a gradual introduction is recommended. Opt for soft- well cooked vegetables and fruits like mashed bananas, berries and steamed broccoli.

  2. Adequate Hydration: Ensure she drinks sufficient water throughout the day, as dehydration exacerbates constipation. This is crucial for individuals with PWS, as their natural thirst mechanism might be impaired.

  3. Monitor for Gastroparesis: Vomiting in PWS could indicate gastroparesis (delayed stomach emptying). A low-fat, low-fiber, and small, frequent meals approach might help if this is a contributing factor. Consult a gastroenterologist for a definitive diagnosis.

  4. Regular Bowel Regimen: Incorporate natural laxatives (e.g., prune juice) or mild over-the-counter options (e.g., polyethylene glycol) as advised by a healthcare provider. Establishing a consistent toileting schedule can also help.

  5. Monitor Meal Portions: Even with dietary modifications, portion control is critical for PWS management. Meals should be nutrient-dense and lower-calorie to prevent overeating.

  6. Limit Problematic Foods: Avoid foods that may exacerbate constipation or slow digestion, such as high fat, fried, or processed foods. Assess her response to dairy, as lactose intolerance can worsen symptoms.

  7. Incorporate Physical Activity: Gentle physical activities, such as walking, can aid digestion and bowel regularity. Even minor increases in movement can be beneficial.

  8. Work with a Specialist Dietitian: A dietitian experienced in PWS can provide tailored guidance, ensuring her diet supports optimal digestion while managing PWS-related challenges.

A comprehensive evaluation by a gastroenterologist, possibly including imaging and motility studies, might also uncover underlying issues contributing to these episodes. Keeping a daily record of BM’s using the Bristol stool chart will be helpful (type 3-4 is considered normal).

Resources:

GI-Algorithm-Chart-2022.pdf

A descriptive study of colorectal function in adults with Prader-Willi Syndrome: high prevalence of constipation

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