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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Irritable Bowel Syndrome (IBS) - Pathophysiology, Diagnosis and Management Algorithm
Risk factors: Previous acute enteric infection, Female
Irritable Bowel ... Syndrome (IBS) - ... functional somatic syndromes ... Pregabalin #IBS #Irritable ... #Bowel #Syndrome
Rome IV Criteria for the Irritable Bowel Syndrome.

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

#FODMAP #diet #foods #ibs #irritable #bowel #syndrome
diet #foods #ibs #irritable ... #bowel #syndrome
IBS-C Pharmacologic Therapies and Recommendations
Linaclotide, Plecanatide, Lubiprostone, PEG laxatives, Tegaserod, Rifaximin, Eluxadoline, Alosetron, Loperamide, TCAs, SSRIs,
Antispasmodics #IBSC #irritable ... #bowel #syndrome
Causes of a low fecal elastase
Abnormal pancreatic imaging:
Chronic pancreatitis, Pancreatic tumours including cystic disease, Pancreatic resection,
Shwachman-Diamond syndrome ... acid diarrhoea, Irritable ... bowel syndrome, ... Inflammatory bowel ... disease, Small bowel
Ileal Pouch Disorders - Differential Diagnosis
 • Surgical/Mechanical: Anastomotic leak, Pelvic sepsis, Sinus, Fistula, Strictures, Efferent
Efferent limb syndrome ... Afferent limb syndrome ... Small bowel bacterial ... • Functional: Irritable ... pouch syndrome,
Rome IV Criteria for diagnosing Functional Abdominal Pain Disorders (FAPD)
Irritable bowel syndrome
The criteria must be fulfilled
Disorders (FAPD) Irritable ... bowel syndrome ... constipation, not irritable ... bowel syndrome) ... bowel syndrome,
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
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