Dr. Michael Chew @mchew85
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GrepMed Gastroenterology-Hepatology Editor, Academic Hospitalist UC Davis Medical Center Internal Medicine, Yale Gastroenterology Fellow '22
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Causes of Small Bowel Bleeding - Differential Diagnosis
Common Causes:
 • Under age 40 years: Inflammatory Bowel
Causes of Small Bowel ... : Inflammatory Bowel ... purpura, Small bowel ... Plummer-Vinson syndrome ... , Inherited syndromes
Irritable Bowel Syndrome (IBS) - Pathophysiology, Diagnosis and Management Algorithm
Risk factors: Previous acute enteric infection, Female
Irritable Bowel ... Syndrome (IBS) - ... functional somatic syndromes ... IBS #Irritable #Bowel ... #Syndrome #Pathophysiology
Rome IV Criteria for the Irritable Bowel Syndrome.

#Diagnosis #PrimaryCare #IBS #IrritableBowelSyndrome #RomeIV #Criteria
the Irritable Bowel ... Syndrome.
FODMAP (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) elimination diet

#FODMAP #diet #foods #ibs #irritable #bowel #syndrome
ibs #irritable #bowel ... #syndrome
Causes of a low fecal elastase
Abnormal pancreatic imaging:
Chronic pancreatitis, Pancreatic tumours including cystic disease, Pancreatic resection,
Shwachman-Diamond syndrome ... diarrhoea, Irritable bowel ... syndrome, Inflammatory ... bowel disease, ... Small bowel bacterial
IBS-C Pharmacologic Therapies and Recommendations
Linaclotide, Plecanatide, Lubiprostone, PEG laxatives, Tegaserod, Rifaximin, Eluxadoline, Alosetron, Loperamide, TCAs, SSRIs,
IBSC #irritable #bowel ... #syndrome #constipation
Ileal Pouch Disorders - Differential Diagnosis
 • Surgical/Mechanical: Anastomotic leak, Pelvic sepsis, Sinus, Fistula, Strictures, Efferent
Efferent limb syndrome ... Afferent limb syndrome ... Small bowel bacterial ... Irritable pouch syndrome
Rome IV Criteria for diagnosing Functional Abdominal Pain Disorders (FAPD)
Irritable bowel syndrome
The criteria must be fulfilled
FAPD) Irritable bowel ... syndrome The criteria ... not irritable bowel ... syndrome) • After ... for irritable bowel
Normal Colonic Diameters
Normal bowel caliber can be remembered using the 3-6-9 rule:
 - Small bowel: <3
Diameters Normal bowel ... rule: - Small bowel ... 3 cm - Large bowel
Inflammatory Bowel Disease (IBD) Diet Recommendations:
Crohn's Disease:
 • Increase: Vegetables, Fruits
 • Decrease: Saturated and trans
Inflammatory Bowel ... #Inflammatory #Bowel