Understanding Idiopathic Nausea

A recent article describes a retrospective chart review of 45 children with chronic nausea and compares them to 49 children with chronic abdominal pain (J Pediatr 2014; 164: 1104-09).

Key findings:

  • While onset of symptoms was similar, the chronic nausea cohort presented at a median age of 15 years compared with 12 years for the pain cohort.
  • Comorbid conditions like anxiety, dizziness and fatigue were common in chronic nausea cohort.
  • Family history of migraines was note in 71% of nausea cohort compared with 22% in pain cohort
  • Extensive laboratory and imaging was much more frequent in nausea cohort.  With nausea cohort, 78% had abdominal ultrasound, 60% an upper GI, 58% brain imaging with either a CT scan or MRI, 38% gastric emptying, 31% abdominal CT or MRI, and 24% had HIDA.
  • Almost all endoscopies were normal (98% of chronic nausea group and 100% of pain cohort)
  • For nausea cohort treatment, tricyclic antidepressants showed a good response (=at least 50% symptom improvement) in 44% with a mean maximal dose of 50 mg. In contrast, with proton pump inhibitors, only 22% had some improvement (=at least 25% symptom improvement).  Similarly, ondansetron showed some improvement in 50% –though none had a “good response.”
  • Twelve patients (27%) of the nausea cohort met diagnostic criteria for cyclic vomiting syndrome (CVS) (with interepisode nausea) and another nine (20%) developed chronic nausea after ‘outgrowing’ CVS.
  • Postural (orthostatic) tachycardia syndrome (POTS) was noted in 16 of 45 in the nausea cohort based on an orthostatic screen (heart rate ≥30 beats/min during positional changes from 10 minutes in supine position to standing.

As the authors note, their study, conducted between 2006-2012, had numerous limitations, particularly the relative small size and retrospective nature.  In addition, the physician expertise in nausea/vomiting at Children’s Hospital of Wisconsin predisposes to a selection bias.

Take-home message: Nausea can be a severe symptom but is often difficult to manage. Extensive workup has a low yield in absence of other complaints or physical exam findings.

An AGA technical review on nausea and vomiting was published in 2001: GASTROENTEROLOGY 2001;120:263–286 

Related blog posts:

Disclaimer: These blog posts are for educational purposes only. Specific dosing of medications/diets (along with potential adverse effects) should be confirmed by prescribing physician/nutritionist.  This content is not a substitute for medical advice, diagnosis or treatment provided by a qualified healthcare provider. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a condition.

 

5 thoughts on “Understanding Idiopathic Nausea

  1. Pingback: 10 Years of Anxiety and Upper Endoscopy Correlation | gutsandgrowth

  2. Pingback: Dreaded Nausea | gutsandgrowth

  3. Pingback: Outcome with POTS –Better than Expected? | gutsandgrowth

  4. Pingback: Advice on Abdominal Pain for Everyone Who Cares for Children | gutsandgrowth

  5. Pingback: Dreaded Nausea (2017) | gutsandgrowth

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.