Exam 5 Flashcards
What is the function of the mouth
-digestion starts
-breaks up food
-language
What is the function of the salivary glands
-saliva moistens and lubricates food
-amylase digests polysaccharides
What is the function of the pharynx
swallows
What is the function of the esophagus
transports food
What is the function of the stomach
-stores and churns food
-pepsin digests protein
-HCl activates enzymes, breaks up food, kills germs
-mucus protects stomach wall
-limited absorption
What is the function of the liver
-breaks down and builds up biological molecules
-stores vitamins and iron
-destroys old blood cells
-destroys poisons
-bile aids digestion
What is the function of the gallbladder
-hormones regulate BG levels
-bicarbonates neutralize stomach acid
-trypsin and chymotrypsin digest proteins
-amylase digests polysaccharides
-lipase digests lipids
What is the function of the small intestine
-completes digestion
-mucus protects
gut wall
-absorbs nutrients, most water
-peptidase digests proteins
-sucrases digest sugars
-amylase digests polysaccharides
What is the function of the large intestine
-reabsorbs some water and ions
-forms and stores feces
What is the function of the rectum
stores and expels feces
What is the function of the anus
opening for elimination of feces
Dysphagia
difficulty swallowing
Dysphagia etiology
-neuromuscular dysfunction
-structural dysfunction
dysphagia complications
-malnutrition
-aspiration
Dysphagia S&S
-pain/cough with swallowing
-choking/aspiration
-malnutrition
-weight loss
-regurgitation
-pooling of food
-drooling
Dysphagia treatment
-thickener
-aspiration precautions
-keep head up
-surgical correction
-dont use straw, increases risk for aspiration
esophageal pain types
-pyrosis (heartburn)
-pain in middle of chest (mimics angina pectoris, may radiate)
esophageal pain pathophysiology of pyrosis
reflux gastric contents into esophagus
-feeling of heartburn
esophageal pain pathophysiology chest pain
-esophageal distention
-powerful esophageal muscle contraction
esophageal pain S&S
-chest pain
-SOB
-retrosternal burning
-water brash (regurgitation sour or tasteless saliva into mouth)
-nausea
esophageal pain treatment
-prevention
-causative agent specific
diarrhea
increase in frequency and fluidity of bowel movements
what are some causes of acute diarrhea
-infection
-stress
-food allergy
-leakage stool around an impaction
chronic diarrhea
-greater than 4 weeks
-malabsorption
-chronic infection
diarrhea pathophysiology
-motility disturbance: decrease contact time of chyme with small intestine
-exudative: inflammatory process of mucous, blood, protein
-toxins stimulate intestinal fluid secretion impairing absorption
-increased amount poorly absorbed solutes
constipation
-small, infrequent or difficult bowel movements
-fewer than 3 stools per week
constipation etiology
-low fiber diet
-slow peristalsis
constipation risk factors
slow peristalsis in elderly, post op, narcotic users
constipation complications
lead to impaction
gastroesophageal reflux disease (GERD)
-backward flow of gastric contents into esophagus
-may or may not produce symptoms
-#1 cause esophageal pain
-leads to metaplasia
gastroesophageal reflux disease (GERD) pathophysiology
-incomplete closure lower esophageal sphincter
-increased abdominal pressure
-drugs
GERD incomplete closure lower esophageal sphincter may be affected by
-fatty foods
-caffeine
-ETOH (alcohol)
-smoking
-sleep position
-obesity
GERD increased abdominal pressure is affected by
-pregnancy
-hiatal hernias
-tight clothing
drugs causing GERD
-beta agonist
-CCB
-nitrates, anticholinergics
GERD S&S
-heartburn (dyspepsia)
-regurgitation
-dysphagia
-chronic cough, asthma, aspiration pneumonia
-chest pain after meal
GERD complications
-bleeding
-esophageal strictures (ulcers)
-barrett esophagus (from metaplastic mucosa)
-cough, asthma, laryngitis
GERD treatment
-increase function of lower esophageal sphincter: HOB elevated
-surgical repair
-H2 blockers, PPI
-avoid alcohol, fatty foods, eating before bed, quit smoking, small meals. increase fluid
Hiatal hernia
-cause not understood
-associates with conditions of increased intra abdominal pressure: ascites, pregnancy, obesity, chronic straining/coughing
Hiatal hernia pathophysiology
defect in diaphragm allowing portion of stomach to pass into thorax
Hiatal hernia S&S
-ulcerations
-predisposed to GERD: heartburn, chest pain, dysphagia
Hiatal hernia complications
incarcerated hernia- strangulated: rare and life threatening, portion of stomach caught above diaphragm and occluded
Hiatal hernia treatment
-alleviate symptoms, avoid food late at night, elevate head (same as GERD)
-surgery for incarceration and intractable reflux
Gastritis
inflammation stomach lining
What can cause Acute gastritis
-overuse alcohol
-aspirin
-NSAIDS
-tobacco
Chronic gastritis
precursor to cancer
-helicobacter pylori
Acute gastritis pathophysiology
self limiting
Chronic gastritis pathophysiology
Helicobacter pylori promotes inflammation in gastric mucosa, interferes with prostaglandins which normally provide protection
Gastritis S&S
-anorexia
-nausea
-vomiting
-hematemesis (vomit blood)
-dyspepsia (burps burn)
-postprandial discomfort (after eating)
-chronic gastritis: pernicious anemia
Gastritis complication
acid makes hole in stomach if untreated
Gastritis treatment
-remove causative agent
-small meals, lower gastric pH, avoid irritants
-antibiotic to get rid of helicobacter pylori
Gastroenteritis
(food poisoning)
-irritation stomach and small intestine lining from pathogen or toxin
-norovirus is common cause
-usually self limiting
Acute gastroenteritis pathophysiology
-direct pathogen or toxin invasion in GI tract causing inflammation
-ingested bacteria
-imbalance normal flora: predisposes travelers gastroenteritis
Chronic gastroenteritis pathophysiology
-result to another GI disorder such as ulcerative colitis or Crohn’s
Gastroenteritis S&S
-fluid and electrolyte imbalance signs (dry)
-abdominal discomfort
-pain
-nausea, vomiting, diarrhea
-12-72 hr course
-elevated temp and malaise
Gastroenteritis complications
dehydration and electrolyte imbalance
Gastroenteritis treatment
fluid replacement and electrolyte replacement
Peptic ulcer disease (PUD)
-from acid and pepsin
-injuries in esophagus, stomach, duodenum, jejunum
-slight to mucosal injury ulcerations in severity
Peptic ulcer disease (PUD) etiology
-H pylori
-aspirin/NSAIDS
-caffeine
-diet/stress
-smoking
Peptic ulcer disease (PUD) stomach pathophysiology
-hypersecretion HCL acid
-breaks in lining may be exacerbated by meds
-10 min pain onset
Peptic ulcer disease (PUD) duodenum pathophysiology
-excessive secretion acid
-couple hours till pain onset
Peptic ulcer disease (PUD) S&S
-epigastric pain
-nausea
-abdominal upset
-chest pain
Peptic ulcer disease (PUD) complications
GI bleeding from it eroding to blood vessel
-upper stomach: dark tarry stool
-lower stomach: bright red stool
Peptic ulcer disease (PUD) treatment
-PPI (protonic pump inhibitor)
-eradication H pylori
-coating agents
-smoking cessation
-avoid aspirin/NSAIDS
-avoid stress and dietary irritants
Ulcerative colitis (UC)
-inflammatory disease of mucosa of rectum and colon
-affects epithelial layer
-remission/exacerbations
-mostly lg intestine
ulcerative colitis (UC) etiology
poorly understood
-genetic: Jewish
-environmental
-immunological
-stress doesnt cause but increases severity of attack
ulcerative colitis (UC) pathophysiology
-immunological changes in cytotoxic T cells
-leukocytes invade and crypt abscesses develop
-abscesses drain, become necrotic and ulcerate
-sloughing: bloody, mucous filled stools
-increased risk colorectal cancer
Ulcerative colitis (US) S&S
-abdominal pain
-blood, mucous filled diarrhea (brighter red)
-rectal bleeding
-weight loss
-anorexia
-anemia
-dehydration
Ulcerative colitis (UC) treatment
-steroids: short term
-immunosuppressive therapy
-antibiotics
-colectomy and ileectomy
Crohns diseases
-inflammation extends through all layers intestinal wall
-commonly effects terminal ileum
-mostly sm intestine
-diagnosed by age 20
-cause unknown
Crohns disease risk factors
-genetics
-ethnicity: Caucasians
-Jewish
-smoking
-urban dwellers
Crohns disease pathophysiology
-lymph nodes in GI tract enlarge blocking flow
-inflammation leads to deep linear ulcer and crypt abscess
-thickened with fibrous scarring
-bowel becomes incapable of absorbing intestinal contents (cant absorb food)
Crohns disease S&S
-constant abdominal pain in RLQ during flareups!
-diarrhea
-abscesses
-weight loss
-nutrient deficiencies
-fluid imbalance
-fever
-distention
-arthritis
-uveitis: eyes
-cheilitis: lips
-dermatological lesions: erythema nodosum
(more systemic than ulcerative colitis)
Crohns disease complications
-Perianal fissures
-Fistulas
Crohns disease treatment
-antitumor necrosis factor
-corticosteroids
-antidiarrheals
-opoids
-stress reduction
-vitamin supplements
-limit fruits, veggies, high fiber, dairy, spicy fatty foods, carbonates and caffeinated drinks
Enterocolitis/Pseudomembranous colitis
-c diff diarrhea
-inflammation and necrosis large intestine
-“antibiotic associated colitis”
-can be from surgery/cancer as well
Enterocolitis/Pseudomembranous colitis pathophysiology
-antibiotic exposure: kills microflora then C diff toxins infect
-bacterial toxins
-colon develops “pseudo membrane” with leukocytes, mucous, fibrin, inflammatory cells
-mucosal necrosis
Enterocolitis/Pseudomembranous colitis S&S
-diarrhea (often bloody)
-abdominal pain
-increased HR first sign
-major cause of fever among hospitalized patients receiving antibiotics!
Enterocolitis/Pseudomembranous colitis complications
perforation
Enterocolitis/Pseudomembranous colitis treatment
-stop antibiotic
-oral flagyl or vancomycin
-supportive care
appendicitis
-inflammation of vermiform appendix
appendicitis risk factors
-peak age 10-19yrs
-more common in men
-low fiber diet
appendicitis pathophysiology
-caused by obstruction
-inflammation can lead to necrosis of appendix and lack of perfusion
-infection
-perforation
-peritonitis (inflammation peritoneum from bacteria or irritating substances)
appendicitis S&S
-generalized periumbilical for 1-3 days
-pain localizes to RLQ (McBurneys point!)
-rebound tenderness!
-nausea
-diarrhea
-anorexia
-fever: increased WBC!
appendicitis treatment
-removal
-open surgery of ruptured or perforated
-laparoscopic is preferred removal
-antibiotic therapy
-fluid replacement
-fever still persists for 1-2 days after surgery
irritable bowel syndrome (IBS) risk factors
-more common females
-onset before age 35
irritable bowel syndrome (IBS) pathophysiology
-poorly understood
-disorder of motility
-increased wave activity in colin
-heightened sensory response to distention and stimulation
-greater visceral pain sensitivity
-no test to determine
irritable bowel syndrome (IBS) S&S
-alternating diarrhea/constipation
-abdominal pain
-different variations
-mucous in stool
irritable bowel syndrome (IBS) treatment
-anti diarrheal agents
-anti spasmodic agents
-increase fiber
-hydration
colon polyps
-protrusion into lumen of GI tract (unknown cause)
-benign or not yet malignant lesion
-found in colonoscopy
-chunk of tissue
colon polyps treatment
removal upon identification
colon cancer risk factors
-over age 40
-high fat, low fiber diet
-obesity and insulin resistance
-inactivity
-african american
-tobacco
-heredity!
-ulcerative colitis, chrons disease, polyps (remove to prevent cancer)
Colon Cancer Pathophysiology
unknown
colon cancer S&S for right side of colon
-obstruction
-abdominal cramping/fullness
-ribbon or pencil like stools
-blood or mucous in stool
Colon cancer S&S for rectum
-change in bowel habits
-rectal fullness (late)
Colon cancer treatment
-surgical removal so need colostomy from portion of colon being removed
-chemo
-radiation
-prevention: screening age 50
warning signs GI tract cancer
-black tarry or bloody stool
-pencil shaped stool
-change in bowel habits
bowel obstruction internal etiology
tumors, fecal impactions, inflammation, strictures
bowel obstruction external etiology
-adhesions, hernias
bowel obstruction non mechanical etiology
loss or decreased peristalsis
bowel obstruction pathophysiology
-intestinal contents accumulate above obstruction causing failure to absorb contents and abdominal distention
-loss fluid from vascular space
-fluid/electrolyte and acid/base imbalance
bowel obstruction complications
-hypovolemic shock then death
-necrosis and perforation if blood flows cut off
bowel obstruction S&S
-N/V
-hiccups
-no gas and obstipation
-pain
-distention: rounded and tight!
-high pitched bowel sounds or absent bowel sounds!
-dehydration
-hypotension
-shock
bowel obstruction treatment
-NG tubes
-fluid and electrolyte replacement
-pain management
-surgical correction
-dont give narcotics
peritonitis etiology
-contamination peritoneal cavity
-perforation visceral organs
-ascending infections
-hematopoietic/lymphatic spread
-leakage during surgery
Peritonitis Pathophysiology
inflammation of peritoneum causes vasodilation/capillary permeability and fluid shifts to peritoneal cavity
-fluid/electrolyte and pH imbalances
peritonitis complications
hypovolemic or septic shock, multiple system organ failure and death
peritonitis S&S
-rigid board like abdomen from fluid or blood!
-shoulder and thorax pain!
-rebound tenderness!
-no gas or BM!
-N/V
-high fever
-decreased bowel sounds
-increased HR and WBS
-hiccups
-signs of shock
peritonitis treatment
-remove cause with surgery
-antibiotics
-fluids
-increase BP meds
role of bile
-aid in digestion of lipids
-transport waste products: bilirubin, cholesterol, IgA, toxins
bile is formed in the
liver
bile is stored in the
gallbladder and bile ducts
Cholelithiasis etiology
-gallstones composed of mainly cholesterol
-many asymptomatic
Cholelithiasis risk factors
forty, fat, fair, female
Cholelithiasis pathophysiology
-supersaturation of bile with cholesterol
Cholelithiasis S&S
-persistent RUQ abdominal pain (biliary colic) from obstruction of cystic duct by gallstone
-sometimes radiates to back
-N/V
-often precipitates by fatty meal followed by abdominal pain
Cholelithiasis diagnosis
ultrasound
Cholelithiasis treatment
-Surgery: cholecystectomy
-Lithotripsy: mechanical breakdown of stones
Cholecystitis
inflammation of gallbladder wall following stimulating event
Cholecystitis pathophysiology
-obstruction of cystic duct which passes into bile duct from gallbladder
-stasis of bile
Cholecystitis complications
if left untreated the gangrene of gallbladder wall may rupture
Cholecystitis S&S
-acute severe right upper abdominal pain
-fever
-nausea, vomiting, eructation (burping)
-heartburn
Cholecystitis treatment
-pre treatment with antibiotics
-percutaneous catheter or endoscopic drainage with stent placement
-open or laparoscopic surgery
Chronic Cholecystitis
-chronic inflammation of gallbladder
-diabetes and obesity are predisposing factors
-sporadic symptoms
acute pancreatitis predisposing factors
-biliary tract disease
-elevated triglycerides
-alcohol abuse
-infectious origin
-hypercalcemia
insecticides
acute pancreatitis pathophysiology
obstruction pancreatic duct by stone or other cause
-outflow of pancreas gets blocks and enzymes stay and break down pancreas
acute pancreatitis S&S
-increasing pain in LUQ
-radiates to back
-guarded position
-cullens sign: blueish coloration around umbilicus
-grey turner sign: red/brown discoloration at flank