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Step 1 - Gastrointestinal
GI
136
Medical
Graduate
03/24/2014

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Term
Embryo closure problems
Definition
Rostral closure- sternal defects
Lateral closure- omphalocele, gastroscesis
Caudal closure- bladder exstrophy
Term
Atrestia
Definition
Due to vascular accident
"Apple peel atresia"
Term
Gastroschisis
Definition
Extrusion of abdominal contents though the abdominal folds, not covered
Term
Omphalocele
Definition
Herniation of abdominal contents into umbilical cord, covered
Term
MIdgut development
Definition
6th week- herniates through the umbilical ring
10th week- returns to the abdominal cavity and rotates around the SMA
Term
Pancreas and Spleen embryo
Definition
Pancreas is from foregut. Ventral bud becomes the head and main duct
Annular pancreas- ventral pancreatic bud encircles 2nd part of the duodenum
Pancreatic divisum- ventral and dorsal parts fail to fuse
Spleen- from mesentery of the stomach, but supplied by foregut
Term
Retroperitoneal structures
Definition
Suprarenal gland
Aorta and IVC (IVC on R, aorta on the L)
Duodenum (2nd and 3rd parts)
Pancreas
Ureters
Colon (descending and ascending)
Kidneys
Esophagus (lowers 2/3)
Rectum (lower 2/3)
Term
Faliciform ligament
Definition
Liver to abdominal wall
Contains teres hepatis
Term
Hepatoduodenal Ligament
Definition
Liver to duodenum
Contains the portal triad
Connects greater and lesser sacs
Term
Gastrohepatic ligament
Definition
Liver to lesser curve of stomach
gastric arteries
Term
Gastrocolic artery
Definition
Greater curvature to the transverse colon
Contains the gastroepiploic arteries
Term
Gastrosplenic ligament
Definition
Greater curvature of stomach and spleen
Contains the short gastrics and left epiploic vessels
Term
Splenorenal
Definition
Spleen to post abdominal wall
Contains Splenic artery and vein, tail of pancreas
Term
Layer of gut tube
Definition
Submucosa contains the Meissner's plexus
Muscularis externa contains the Myenteric (Auerbachs plexus)
Term
Digestive Histology
Definition
Esophagus- nonkeritinized SS
Duodenum- Villi and MV, Brunners glands, Crypts of Lierberkuhn
Jejunum- Plicae circularis, and crypts of Lieberkuhn
Ileum- Peyers patches, plicae, crypts of lieberkuhn; *largest number of goblet cells in small intestine
Colon- crypts, but no villi, numerous goblet cells
Term
Foregut
Definition
Celiac artery
Vagus N
T12/L1
Stomach to proximal duodenum, liver, gallbladder, spleen, pancreas
Term
Midgut
Definition
SMA
Vagus N
L1
Distal duodenum to prox 2/3 transverse colon
Term
Hindgut
Definition
IMA
Pelvic N
L3
Distal 1/3 of transverse colon to upper part of rectum
Term
Celiac Trunk
Definition
Common Hepatic > Gastroduodenal, HAP, R gastric Artery
Splenic > L gastroepiploic, Short gastric
Left Gastric > esophageal branch
Term
Collateral Circulation
Definition
Sup epigastric (int thoracic) <> Inf epigastric (ext iliac)
Sup pancreatoduodenal (celiac) <> Inf pancreatoduo (SMA)
Middle colic (SMA) <> Left colic (IMA)
Superior rectal (IMA) <> Middle and inf rectal (interal iliac)
Term
Portosystemic anastamoses
Definition
Esophagus: L gastric <> esophageal
Umbilicus: paraumbilical <> sup/inf epigastric (below) and sup epigastric and lateral thoracic (above)
Rectum: Sup rectal <> middle and inf rectal
Term
Above the Pectinate Line
Definition
Adenocarcinoma
Supply from the Sup Rectal Aa (branch of IMA)
Venous drainage to the Sup rectal vein (Inf mesenteric vein)
Lymph drainage to deep nodes
Term
Below the Pectinate Line
Definition
Squamous Cell Carcinoma
Supply from Inf Rectal Aa (branch internal pudendal)
Venous drainage to Inf rectal vein (branch internal pudendal)
Lymph drainage to superficial inguinal nodes
Term
Liver zones
Definition
Zone 1- most susceptible to viral hepatits (periportal)
Zone 3- ischemia and toxins, alcohol (pericentral)
Term
Femoral region
Definition
Lateral to Medial: NAVEL
Femoral triangle: NAV
Femoral nerve does not extend down into the femoral ring
Term
Inguinal canal
Definition
Deep inguinal ring in the transverses abdominus
External spermatic fascia from external oblique
Cremasteric muscle from internal oblique
Internal spermatic fascia from transversals fascia
Term
Indirect Inguinal Hernia
Definition
Through the internal inguinal ring and into scrotum
Enters lateral to the inf epigastric argery
Occurs mostly in infant males
Term
Direct Inguinal Hernia
Definition
Protrudes through the inguinal triangle
Directly through abdominal wall, medial to inf epigastric artery
In older males
Term
Femoral Hernia
Definition
Protrudes blow the inguinal ligament
More common in women
Leading cause of bowel incarceration
Term
Gastrin
Definition
G cells of the stomach (antrum)
Inc Gastric H secretion, Inc growth of mucosa, inc motility
Inc by distention, alkalization, amino acids, peptides, vagal stim
Dec by stomach pH <1.5
Increased in ZE syndrome
*Phe and Tryp are potent stimulators
Term
CCK
Definition
I cells in the duodenum, jejunum
Inc pancreatic secretion, inc gallbladder contraction, Inc SOO relaxation
Dec gastric emptying
Inc by FA, AA
CCK acts on neural muscarinic pathways to cause secretion
Term
Secretin
Definition
S cells duodenum
Inc pancreatic HCO3 secretion, Dec gastric acid secretion
Inc by acid, FA in lumen of duodenum
Term
Somatostatin
Definition
D cells pancreas
Dec ALL secretions
Inc by acid, dec by vagal stimulation
Octreotide is the drug
Term
Glucose-dependent insulinotropic peptide (GIP)
Definition
K cells of duodenum, jejunum
Dec gastric H secretion, Inc insulin release
Inc by FA, AA, oral glucose
Term
Vasoactive intestinal polypeptide (VIP)
Definition
PS ganglia in sphincters, gallbladder, SI
Inc intestinal water and electrolyte secretion, inc relax of Mm
Inc by distention and vagal stim, dec by adrenergic input
Term
VIPoma
Definition
Pancreatic cell tumor that secretes VIP
Watery diarrhea, Hypokalemia and Achlohydria
Term
Motilin
Definition
Small intestine
Produces migrating motor complexes
Inc in fasting state
Erythromycin is a motilin agonist, used to stim peristalsis
Term
Intrinsic Factor
Definition
Parietal cells (stomach)
Vitamin B 12 binding protein, required for uptake in ileum
Autoimmune destruction leads to pernicious anemia and gastritis
Term
Gastric Acid
Definition
Parietal cells (stomach)
Inc by Histamine, ACh, and gastrin
Dec by somatostatin, GIP, prostaglandin, secretin
Gastrinoma- causes high levels of aced secretion and ulcers
Term
Pepsin
Definition
Chief cells (stomach)
Protein digestion
Inc by vagal stimulation, local acid
Pepsinogen is cleaved to pepsin by H+
Term
HCO3
Definition
Mucosal cells
Neutralizes acid
Inc by pancreatic and biliary secretion with secretin
Term
M3 receptor
Definition
Stimulated by Ach fro vagus nerve
Blocked by Atropine
Stimulates Gq > IP3/Ca > ATPase to increase H secretion
Term
CCK receptor
Definition
Stimulated by gastrin from G cells, via vagus nerve
Stimulates Gq > IP3/Ca2 > Stim ATPase to inc H secretion
No effective inhibitor
Term
H2 receptor
Definition
Stimulated by Histamine from ECL cell (which stim by gastrin)
Blocked by H2 blockers
Act cAMP > activate ATPase
Term
Prostaglandins/Misoprostol
Somatostatin
Definition
Ativate Gi which blocks cAMP, blocking ATPase
Term
PPIs
Definition
Block ATPase, decreasing acid secretion
Term
Brunner's glands
Definition
Located in the duodenal submucosa
Secretes alkaline mucus
Hypertrophy seen in peptic ulcer disease
Term
Location of cells in stomach
Definition
Fundus - none
Body- Parietal cells, Chief cells
Antrum- D cells, mucus cells, G cells
Term
Pancreatic secretions
Definition
a-amylase: starch digestion
Lipase: fat digestion
Proteases: protein digestion (secreted as proenzymes)
Trypsinogen: converted to active trypsin by enterokinase in the duodenum
Term
Carbohydrate digestion
Definition
Salivary amylase- Hydrolyzes a-1,4 linkages to yield disacc
Panc Amylase- hydrolyzes to oligo and disaccharides
Oligosacc hydrolases- At brush border of intestine, RLE in carb digestion, produces monosaccharides from oligo and disaccharides
Term
Carbohydrate absorption
Definition
Only monosaccharides can be absorbed (glucose, galactose, fructose)
SGLT1- takes up glucose and galactose
GLUT5- takes up fructose, facilitated diffusion
GLUT2- transports all to the blood
Term
Vitamin absorption
Definition
Iron- absorbed as Fe2 in the duodenum
Folate- Absorbed in the jejunum
B12- absorbed in the terminal ileum along with bile acids
Term
Peyers Patches
Definition
Unencapsulated lymphoid tissue found in the Lamina propria and submucosa of the ileum
Contains specialized M cells that take up antigen
B cells stimulated in the germinal centers differentiate into IgA secreting plasma cells
Term
Bile
Definition
Composed of bile salts (bile acid conjugated to glycine or taurine)
Cholesterol 7a-hydroxylase catalyzes the RLS
For digestion and absorption of lipids and fat soluble vit
For cholesterol excretion
Term
Bilirubin
Definition
Product of heme metabolism
Direct- conjugated with glucuronic acid- water soluble
Indirect- unconjugated, NOT water soluble
Term
Salivary Gland tumors
Definition
Pleomorphic adenoma- Benign, most common. Painless mobile mass. Made of cartilage and epithelium
Warthins tumor- benign cystic tumor with germinal centers
Mucoepidermoid carcinoma- most common malignant tumor, mucinous and squamous components. Painful
Term
Achalasia
Definition
Loss of myenteric (auerbachs plexus)
Inc risk of esophageal squamous cell carcinoma
*birds beak appearance on barium swallow
Can arise from chagas disease or CREST syndrome
Term
Esophagitis
Definition
Candida- white pseudomembrane
HSV-1- punched out lesions
CMV- linear ulcers
Term
BoerHaave Syndrome
Definition
Transmural esophageal rupture due to violent retching
Term
Plummer Vinsons Syndrome
Definition
Dysphagis
Glossitis
Iron deficiency anemia
Term
Barrett's esophagus
Definition
Glandular metaplasia
Replacement of non keritinized squamous epithelium with intestinal non ciliated columnar epithelium
Inc risk esophageal adenocarcinoma
Term
Esophageal cancer
Definition
Squamous- Achalasia, Alcohol, cigarettes, diverticula, esophageal web, hot liquids
Adeno- Barrett's cigarettes, obesity, GERD

In US, adenocarcinoma is more common. Worldwide= squamous
Term
Tropical Sprue
Definition
Unknown cause, responds to Abx
Affects entire small bowel
Megaloblastic anemia from folate def
Term
Whipples dz
Definition
Tropheryma Whipplei
PAS pos, foamy macrophages in lamina propria
*cardiac symptoms, arthralgias, neurologic symptoms
Term
Celiac Sprue
Definition
Autoimmune intolerance of Gliadin, leading to steatorrhea
*HLA-DQ2, DQ8
Anti-endomysial, anti-tissueglutaminase, anti-gliadin Abs
Blunting of villi and lymphs in LP
Assoc with dermatitis herpetidormis and T cell lymphoma
Term
Disaccharide def
Definition
Lactase deficiency
Normal villi
Term
Abetalipoproteinemia
Definition
Dec synth of apolipoprotein B
Inability to generate chylomicrons, dec secretion of cholesterol, VLDL into the blood stream
*presents in early childhood with malabsorption and neurologic manifestations
Term
Pancreatic insufficiency
Definition
Due to CF, obstruction or chronic pancreatitis
Causes malabsorption of fat and fat soluble vitamins
Term
Acute Gastritis
Definition
Disruption of the mucous barrier
Can be caused by stress, NSAIDs, alcohol, uremia, burns (curling ulcers- dec plasma volume, slough gastric mucous) and brain injury (cushing ulcer- inc vagal stim, inc Ach, inc H)
Term
Chronic gastritis
Definition
Type A (fundus, body)- Autoimmune, AutoAb to parietal cells, pernicious anemia, achlohydria
Type B (antrum)- H pylori, inc risk of MALT lymphoma
Term
Menetiriers disease
Definition
Gastric hypertrophy with protein loss, parietal cell atrophy, and inc mucus cells. Precancerous
*rugae of stomach are very hypertrophied, looks like gyro
Term
Stomach cancer
Definition
Adenocarcinoma (almost always), presents acanthosis nigricans
Intestinal- assoc Hpylori, dietary nitrosamines, achlohydria, chronic gastritis, type A blood, on lesser curvature
Diffuse- signet ring cells, grossly thickened and leathery
*linitus plastica
Term
Stomach cancer nodes
Definition
Virchow's node- left supraclavicular node
Krukenberg tumor- bilateral mets to ovaries, signet ring cells
Sister Mary Joseph node- Subq periumbilical mets
Term
Gastric ulcer
Definition
Pain with meals, weight lots
H pylori infection in 70%
Can also be caused by NSAIDs
Increased risk of carcinoma
Often in older patients
Term
Duodenal ulcer
Definition
Decreased pain with meals
H pylori in almost ALL cases
Zollinger Ellison syndrome
Generally benign
Hypertrophy of brunner's glands
Term
Chron's disease
Definition
Disordered response to intestinal bacteria
Any part of GI tract, skip lesions, rectal sparing
*transmural inflammation, cobblestone, creeping fat
*string sign
Non caseating granulomas and lymphoid aggregates
Migratory polyarthritis, erythema nodosum, kidney stones
Tx: azathioprine, methotrexate, infliximab, adalimumab
Term
Ulcerative colitis
Definition
Autoimmune
Continuous colonic lesions, *always with rectal involvement
Friable mucosa psueodpolyps, loss of polyps "lead pipe"
Sclerosing cholangitis, toxic megacolon, colorectal carcinoma
Polyderma gangenosum, Primary sclerosing cholangitis, , anklylosing spondylitis
Sulfasalazine, 6-MP, infliximab
Term
Irritable Bowel Syndrome
Definition
Recurrent abdominal pain associated with 2 or more:
Pain improves with defecation
Change in stool freqeuncy
Change in appearance of stool
Term
Zenker's diverticulum
Definition
False diverticulum, herniation of mucosal tissue at Killian's triangle
*between the thyropharyngeal and cricopharyngeal parts of the inferior pharyngeal constrictor
Term
Meckels diverticulum
Definition
True diverticulum
Persistence of the vitelline duct
May contain ectopic secreting gastric tissue
Can cause itussception, volvulus, or obstruction
2 inches long, 2 ft from ileocecal valve, 2% of population, first two years of life, 2 types of epithelium
Dx vis pertechnetate study
Term
Volvulus
Definition
Mostly occur at the cecum or the sigmoid
Term
Hirschsprung's disease
Definition
Congenital megacolon, lack of enteric nerve plexus
*Failure of NC migration
DIlated portion proximal to the aganglionic segment
Risk increases with DS
Term
Duodenal atresia
Definition
Early, bilious vomiting. Double bubble appearance on XR
Failure of recanalization of the small bowel
Assoc with DS
Term
Meconium ileus
Definition
Assoc with CF
Term
Necrotizing enterocolitis
Definition
Necrosis of the intestinal mucosa
Colon is usually involved, but can involve the entire GI tract
More common in preemies due to dec immunity
Term
Ischemic colitis
Definition
Reduction in the intestinal blood flow
*Pain out of proportion for the physical findings
Pain after eating, weight loss
Common at splenic flexure and distal colon
Term
Adhesion
Definition
Most common cause of small bowel obstruction
Term
Angiodisplasia
Definition
Tortuous dilation of the vessels > hematochezia
In cecum, terminal ileum and ascending colon
Term
Adenomatous polyp
Definition
Precancerous
*villous is more likely malignant (think villainous)
Term
Hyperplastic
Definition
Most common non neoplastic polyp in colon
Term
Juvenile
Definition
Mostly sporadic lesions in children <5
80% in rectum
If single, no malignant potential
Term
Peutz-Jeghers
Definition
Autosomal dominant syndrome featuring multiple nonmalignant hamartomas throughout the GI tract
*Hyperpigmented mouth, lips, hands, genitalia
Inc risk of colorectal cancer and other malignancies
Term
Colorectal cancer
Definition
Rectosigmois > ascending > descending
Ascending- exophytic mass, iron def anemia, wt loss
Descending- infiltrating, partial obstruction, colicky pain, hematochezia
*Fe deficiency anemia in males > 50
Apple core lesion seen on barium enema
CEA tumor marker good for monitoring
Term
FAP
Definition
Autosomal dominant mutation of APC gene on 5q
2 hit hypothesis
100% progress to CRC
Term
Gardners syndrome
Definition
FAP + osseous and soft tissue tumors, congenital hypertrophy of retinal pigment epithelium
Term
Turcot's syndrome
Definition
FAP + malignant CNS tumor
Term
HNPCC/Lynch syndrome
Definition
AD mutation of DNA mismatch repair genes
80% progress to CRC
Proximal colon is always involved
Term
Molecular pathogenesis of CRC
Definition
Micro satellite instability pathway, DNA repair gene mutation
APC/B catenin- chromosomal instability
*Loss of APC, then KRAS then p53 ("AK-53)
Term
Carcinoid tumor
Definition
Neuroendocrine cells
Most commonly the appendix, ileum, and rectum
*dense core bodies seen on EM
Often produces serotonin > wheezing, R sided heart murmurs, diarrhea, flushing
*If confined to GI tract, no symptoms because liver metabolizes the serotonin
Tx Octreotide, somatostatin
Term
Reye's syndrome
Definition
Rare, often fatal hepatoencephalopathy
Fatty liver, hypoglycemia, vomiting, hepatomegaly, coma
*Viral infection treated with aspirin
ASA meabolites dec b oxidation by reversible inhibition of mitochondrial enzyme
Term
Hepatic steatosis
Definition
Short term change with moderate alcohol intake
Macrovesicular fatty change that may be reversible with alcohol cessation
Term
Alcoholic hepatitis
Definition
Swollen and necrotic hepatocytes with neutrophilic infiltration
*Mallory bodies
Term
Alcoholic cirrhosis
Definition
Micronodular, irregularly shrunken liver with hobnail appearance
Sclerosis around central vein
Term
Hepatocellular carcinom
Definition
Inc incidence assoc with HepB and C, Wilsons disease, hemachromatosis, a1 antitrypsin, alcoholic cirrhosis, carcinogens
Inc AFP, may lead to Budd-Chiari syndrome
Term
Cavernous hemangioma
Definition
Common benign liver tumor, occurs at age 30-50
Biopsy contraindicated for risk of hemorrhage
Term
Hepatic adenoma
Definition
Benign, probably from OCP use or steroids
Regress sponatneously
Term
Angiosarcoma
Definition
Malignant tumor of endothelial origin
Assoc with exposure to arsenic, polyvinyl chloride
Term
Budd Chiari Syndrome
Definition
Occlusion of the IVC or hepatic veins
Centrilobular congestion and necrosis
May develop varices, have evident distention of veins
*No JVD
Assoc with hypercoaguable states, PCV, pregnancy, HCC
Term
a1-antitrypsin Deficiency
Definition
Misfolded gene produce protein aggregates in hepatocellular ER
Cirrosis with PAS pos globules in liver
Decrease elastic tissue in lungs > panacinar emphysema
*Codominant
Term
Physiologic neonatal jaundice
Definition
Immature UDP glucuronyl transferase > unconjugated hyperbilirubinemia > jaundice, kernicterus
Tx: phototherapy: converts UCB to water soluble form
Term
Gilbert's Syndrome
Definition
Mildly dec UDP glucuronyl transferase or dec bilirubin uptake
Elevated unconjugated bilirubin without overt hemolysis
Asymptomatic, no clinical consequences
Term
CN syndrome, type 1
Definition
Absent UDP Glucuronyl transferase
Presents early in life; patients die within a few years
Kernicterus (bilirubin in brain), inc unconjugated bilirubin
Tx: plasmapheresis, phototherapy
*Type 2 responds to phenobarbital and is not as bad
Term
Dubin-Johnson Syndrome
Definition
Conjugated hyperbilirubinemia due to defective liver excretion
Grossly black liver
*Rotor syndrome similar, but no signs at all
Term
Wilson's disease
Definition
Inadequate hepatic copper excretion and failure of copper to enter circulation as ceruloplasmin
Accumulation in liver, brain, kidneys, and joints
Cirrhosis, Kayser-Fleisher rings, carcinoma, hemolytic anemia, Basal ganglia degeneration, asterixis, dementia, dyskinesia and dysarthria
Tx: penicillamine
AR inheritence, c13, ATP7B gene
Term
Hemochromatosis
Definition
Iron deposition
Cirrhosis, diabetes mellitus, bronze pigmentation
Inc risk of hepatocellular carcinoma
C282Y, H63D mutations on HFE gene
Assoc with HLA-A3
Tx: deferasirox, deferoxamine
Term
Secondary Biliary Cirrhosis
Definition
Extrahepatic biliary obstruction
inc pressure in intrahepatic ducts > injury, fibrosis, bile stasis
Pruritis, jaundice, dark urine, light stools, hepatosplenomegaly
Inc conjugated bilirubin, inc cholesterol, inc alk phos
Term
Primary Biliary Cirrhosis
Definition
Autoimmune, lymphocytic infiltrate and granulomas
Pruritis without jaundice
Inc serum mitochondrial Abs, including IgM
*often in middle aged women
Term
Primary sclerosing cholangitis
Definition
Onion skin bile duct fibrosis
Alternating strictures and dilation with beading of intra and extra hepatic bile ducts
Pruritis, jaundice
Inc conjugated bilirubin
Hypergammaglobulinemia (IgM)
Assoc with UC, can lead to secondary biliary sclerosis
Term
Gallstones
Definition
Cholesterol stones- radiolucent, most common
Assoc obesity, chrons disease, CF, Clofibrate, estrogens, and native american origin
Pigment stones- radiopaque, alcoholic cirrhosis, advanced age, biliary infection
Can cause biliary colic
Often Fat, forty, female, fertile
Term
Biliary colic
Definition
neurohumoral activation (CCK) triggers contraction of the gall bladder, forcing a stone into the cystic duct
Term
Acute Pancreatitis
Definition
Gallstones, Ethanol, Trauma, Steroids, Mumps, AI, Scorption sting, Hypercalcemia, Hypertriglyceridemia (>1000), ERCP, Drugs
Elevated lipase, amylase
Can lead to DIC, ARDS, hypocalcemia, soap deposits
Term
Chronic Pancreatitis
Definition
Alcohol abuse and idiopathic causes
Steattorhea, fat soluble vitamin deficiency, DM, inc risk of pancreatic adenocarcinoma
Amylase and lipase are less elevated
Term
Pancreatic adenocarcinoma
Definition
Very aggressive arising from ducts
Tumors more common in panc head
Assoc with CA-19-9, also CEA
RFs- Tobacco use, Age >50, Jewish and AAM
Trousseau's syndrome- migratory thrombophlebitis
Courvosier's sign- obstructive jaundice with non tender GB
Term
H2 blockers
Definition
Cimetidine, Ranitidine, Famotidine, Nizatidine
Reversible block of H2 receptors, dec H secretion
T- Cimetidine is a potent inhibitor of p450, also antiandrogenic effects, cross BBB and placenta
Both cimetidine and raniditidine dec createnine clearance
Term
PPIs
Definition
Omeprazole, lansoparazole, esomeprazole, pantoprazole
Irreversibly inhibit H/K ATPase in parietal cells
T- Inc risk of C diff infection, pneumonia, hip fractures, Dec Mg
Term
Bismuth, sucralfate
Definition
bind to ulcer base, providing physical protection and allowing HCO3 secretion to reestablish pH gradient
Used in travelers diarrhea
Term
Misoprostol
Definition
a PGE1 analog, Ind producton and secretion of mucous barrier
Prevention of NSAID ulcers, maintain PDA, induce labor
T- Diarrhea, abortifactant
Term
Octreotide
Definition
Long acting somatostatin analog
Acute variceal bleeds, acromegaly, VIPoma, carcinoid tumor
T- nausea, cramps, steatorrhea
Term
Aluminum hydroxide
Definition
Constipation and hypophosphatemia, proximal Mm weakness, osteodystrophy, seizures
"aluMINIMUM amount of feces"
Term
Magnesium Hydroxide
Definition
Diarrhea, hyporeflexia, hypotension, cardiac arrest
Term
Calcium carbonate
Definition
Hypercalcemia, rebound acid increase
Can chelate and dec effectiveness of other drugs
Term
Osmotic laxatives
Definition
MgOH, Mag citrate, polyethylene glycol, lactulose
Provide osmotic load to draw water out
Lactulose also treats hepatic encephalopathy, promotes nitrogen excretion and NH4
T- constipation, dehydration
Term
Infliximab
Definition
Monoclonal Ab to TNF-a
Chrons disease, UC, RA
T- reactivation of latent TB, fever, hypotension
Term
Sulfasalazine
Definition
Combo of Sulfapyridine and 5-aminosalicylic acid
Activated by colonic bacteria
UC, Chrons
T- sulfonamide tox, reversible oligospermia
Term
Ondansetron
Definition
Serotonin antagonist, powerful central acting anti-emetic
Control vomiting post op and chemo
T- HA, constipation
Term
Metoclopramide
Definition
D2 receptor antagonist
Inc resting tone, contractility, LES tone, motility
Diabetic and post surge gastroparesis
T- parkinson effects, Interaction with digoxin and diabetic agents
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