Gastroparesis
The term for epigastric pain with a sensation of delayed gastric emptying is "gastroparesis."
Definition and Clinical Presentation
Gastroparesis is a chronic disorder of gastric motility characterized by objectively delayed gastric emptying in the absence of mechanical obstruction 1, 2. The condition presents with a constellation of upper gastrointestinal symptoms that include:
- Cardinal symptoms: Nausea and vomiting 1
- Associated symptoms: Early satiety, postprandial fullness, abdominal pain (including epigastric pain), and bloating 1, 3
The sensation of "slow food passage" you describe corresponds to the postprandial fullness and early satiety that result from impaired gastric emptying 4, 5.
Important Diagnostic Considerations
Symptom Overlap Creates Diagnostic Challenges
There is significant overlap between gastroparesis and functional dyspepsia, which can make diagnosis challenging 2. When abdominal pain is the predominant symptom, it is particularly important to rule out alternative and possibly coexisting causes before considering gastroparesis as the diagnosis 1.
Recent evidence shows that among patients with gastroparesis-like symptoms (moderate to severe nausea with moderate to severe postprandial distress), only 33% actually have delayed gastric emptying on testing 6. This highlights that the symptom complex alone is insufficient for diagnosis.
Confirming the Diagnosis
The diagnosis requires three elements 2, 3:
- Appropriate symptoms (nausea, vomiting, postprandial fullness, epigastric pain)
- Objective documentation of delayed gastric emptying via testing
- Absence of mechanical obstruction
Gastric emptying scintigraphy with a 4-hour study is the gold standard test 1, 2. The 4-hour measurement is critical because performing only a 2-hour study misses patients who normalize early but remain delayed at 4 hours 1.
Common Pitfalls to Avoid
- Do not diagnose gastroparesis based on symptoms alone—objective testing is mandatory 1, 2
- Ensure testing is performed without confounders: avoid hyperglycemia, opioids, GLP-1 receptor agonists, and prokinetic agents during testing 1
- Recognize that symptom severity correlates poorly with the degree of gastric emptying delay 3
- In pediatric patients, nausea is the only individual symptom significantly associated with delayed emptying 7
Etiology
The three main causes are 2, 3:
- Diabetic (approximately 25% of cases)
- Idiopathic (approximately 50%, many likely post-infectious)
- Postsurgical