Gastroparesis: Difference between revisions
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*1. Parkman HP, Hasler WL, Fisher RS. American Gastroenterlogical Association technical review on the diagnosis and treatment of gastroparesis. Gastroenterology. 2004; 127(5): 1592-1622. |
Revision as of 04:15, 6 January 2017
Background
- Symptomatic chronic stomach disorder characterized by delayed gastric emptying without mechanical obstruction
- More common in women, presumed due to elevated progesterone
- Disease associated with reduced quality of life
- Most commonly idiopathic but also commonly seen in diabetics
- Symptoms overlap with Functional Dyspepsia
Causes of Non-Obstructive Delayed Gastric Emptying
- Idiopathic
- Diabetes mellitus
- Postsurgical/Vagal nerve injury
- GI disorders associated with delated gastric emptying
- GERD
- Achalasia
- Atrophic gastritis
- Functional Dyspepsia
- Hypertrophic Pyloric stenosis
- Celiac disease
- Non-GI disorders associated with delayed gastric emptying
- Eating disorders: Anorexia nervosa
- Neurologic disorders such as parkinson's
- Collagen vascular disorders
- Endocrine and metabolic disorders
- Thyroid/Parathyroid dysfunction
- Chronic renal insufficiency
- Medication associated
- Most commonly used: Opioid analgesics, anticholinergics, progesterone, PPIs, alcohol, tobacco
- Malignancy associated
- Ischemic gastroparesis
Clinical Features
- Symptons variable and include:
- Early satiety
- Nausea and vomiting
- Bloating and upper abdominal discomfort
- Abdominal pain (not predominant symptom)
- Signs, long standing disease:
- Dehydration
- Malnourishment
Differential Diagnosis
By organ system
- GI
- Peptic ulcer disease
- Mechanical Obstruction
- Adhesion
- Small bowel obstruction/LBO
- Gastric outlet obstruction/Pyloric stenosis
- Volvulus
- Strangulated hernia
- Pancreatitis
- Appendicitis
- Cholecystitis, Cholangitis
- Acute Hepatitis
- [[IBD]
- Intussusception
- Malignancy
- Mesenteric ischemia
- Esophageal disorders (e.g. achalasia, GERD, esophagitis)
- Functional disorders such as Irritable Bowel Syndrome
- Neurologic
- Infectious
- Spontaneous bacterial peritonitis
- Urinary tract infection
- Bacterial toxins, Viruses (adeno, norwalk, rota)
- Drugs/Toxins
- Heavy metal poisoning
- Methanol poisoning
- Endocrine
- Diabetic ketoacidosis
- Thyroid/parathyroid disorders
- Uremia
- Miscellaneous
Evaluation
- Diagnosed by demonstrating delayed gastric emptying in a symptomatic patient after other etiologies are excluded
- Gold standard to evaluate for delayed gastric emptying:
- Gastric emptying scintigraphy of a solid-phase meal
- Test quantifies the emptying of a physiologic caloric meal (0, 1, 2, and 4 hours post-prandial measurements)
- Gastric emptying scintigraphy of a solid-phase meal
- Alternative tests assessing gastric emptying include:
- Breath tests
- Upper GI barium study
- Ultrasound for serial changes in antral area
- Abnormal gastric emptying suggests but does not prove that symptoms are caused by Gastroparesis
- Gold standard to evaluate for delayed gastric emptying:
- Disorder of gastric motor function not excluded in patients with normal gastric emptying
- Regional dysfunctions of the stomach such as impaired fundic relaxation or gastric myoelectric dysrhythmias
- Disorder of gastric motor function not excluded in patients with normal gastric emptying
- Screen for secondary causes of Gastroparesis
- Thyroid function tests
- Rheumatologic serologies
- HbA1C
Workup To Exclude Alternative Etiologies
- CBC
- Chem
- LFTs
- Lipase
- Coags
- Urinalysis
- Urine pregnancy (females)
- Consider:
- ECG (if >50 or at risk for cardiac disease)
- RUQ US
- Acute abdominal series including an upright CXR
- Consider if at risk for perforated ulcer
- Upper endoscopy or radiographic upper GI series to exclude mechanical obstruction or ulcer disease
- CT with oral and/or IV contrast to assess for intestinal obstruction
Treatment of Symptomatic Gastroparesis
- General principles include
- 1. Correct fluid, electrolye, and nutritional deficiencies
- 2. Identify and treat underlying cause if possible
- 3. Reduce symptoms
- Important to review patient's medications, some medication may exacerbate symptoms
- Diabetic patient should have optimal glucose control
- Hyperglycemia alone can delay gastric emptying
- Dietary modifications
- Medications:
- Anti-emetic agent- typical primary therapy
- Phenothiazines (dopamine receptor antagonists)
- Prochlorperazine
- Trimethobenzamide
- Promethazine
- Serotonin receptor antagonists
- Ondansetron
- Typically only used prn
- Phenothiazines (dopamine receptor antagonists)
- Prokinetic agent
- Enhance gut contractility
- Metoclopramide
- Also anti-emetic actions
- Limited use to approximately 1 month
- Starting dose 10mg 30 minutes before meals and at bedtime
- Erythromycin
- Macrolide antibiotic has pro kinetic actions
- Starting dose 125-350mg TID or QID
- Similar efficacy as Metoclopramide
- Other agents less commonly used
- Anti-emetic agent- typical primary therapy
- Refractory disease
- Nasogastric suction to decompress the stomach
- Some patients respond better to alternative pro-kinetics than others
- Dual therapy with both anti-emetic and pro-kinetic agents
- Consider psychotropic medications
- Placement of feeding jejunostomy and/or venting gastrostomy
- Advanced/experimental therapies include:
- Pyloric infection of botulinum toxin
- Gastric electric stimulation
- Alternative and unconventional medical therapies
Complications
- Acute Gastric Dilation
- Esophagitis
- Mallory-Weiss tear
- Bezoar
- Dehydration
- Malnutrition
Disposition
- Refractory disease may require hospitalization if:
- PO intolerance
- Pronounced dehydration requiring intravenous hydration
- Glycemic control
- Electrolyte correction
- Outpatient management if none of the above and symptoms controlled
See Also
External Links
References
- 1. Parkman HP, Hasler WL, Fisher RS. American Gastroenterlogical Association technical review on the diagnosis and treatment of gastroparesis. Gastroenterology. 2004; 127(5): 1592-1622.