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76 Cards in this Set

  • Front
  • Back
Acetylcholine
Increases gastric acid
Norepinephrine
Inhibitor
Gastrin
Increase secretion of gastric juices
Cholecystokinin
Release of bile into the duodenum
Secretin
Increased production of bicarbonate-rich pancreatic juice
Histamine
Increased gastric acid production
GI Tract
is 23-26 feet long starts at the mouth ends at the rectum
Small Intestine
is the longest segment of the GI, this is where absorption of nutrients to the bloodstream
Large Intestine
Ascending, transverse, descending to the sigmoid
Sympathetic nervous system
exert an inhibitory effect on the GI tract, decreasing gastric secretion and motility and causing sphincters and blood vessels to constrict
Parasympathetic nervous system
causes peristalsis and increased secretory activities, sphincters relax
Upper esophagus and external anal sphincter
are under voluntary control
Primary function of the GI tract
Breakdown, absorption, and elimination
The function of gastric secretions
breakdown food into more absorbable form and aid in the destruction of most ingested bacteria
Intrinsic factor
is also secreted by the gastric mucosa, combines with dietary vitamin B12 so that the vitamin can be absorbed in the ileum (no intrinsic no Vitamin B12 absorption)
Chyme
partially digested food mixed with gastric secretions
Duodenal secretions (small intestines)
come from pancreas, liver and gallbladder-digestive enzymes amylase, lipase, and bile
trypsin
aids in the digestion of protein
amylase
aids in the digestion of starch
lipase
aids in the digestion of fats
villi
small fingerlike produce enzymes and absorbs nutrients
Bacteria in the large intestine
assists in the completing the breakdown of waste material, especially of undigested or unabsorbed proteins and bile salt
The GI tract contains how much gases normally?
150ml
Pain in the GI
there are NO pain receptors however there are stretch receptors
Dyspepsia
Indigestion
Dyspepsia s/s
pain, discomfort, fullness, bloating, early satiety, belching, heartburn, regurgitation
Blood in the upper GI tract
tarry-black color
blood in the lower portion of GI
bright or dark red (anal bleeding if it is streaking)
Achalasia
absence of peristalsis of the lower esophagus resulting in difficulty swallowing, regurgitation, and into the bloodstream
What is stomach cancer?
Cancer of the stomach wall, no signal causitive agennts, has been associated with diets containing
*smoked foods
*salted fish or meats
*pickled vegetables
Hiatal hernia
stomach moves up into the lower portion of thorax, 90% are sliding
What are clinical manifestations of stomach cancer?
often spreads before symptoms occur
unexplained weight loss
lack of appetite
indigestion
abdominal pain
signs and symptoms of anemia such as
*pallor
*fatigue
*weak
*Shortness of breath
*dizziness
--Possible abdomen distention
Hiatel Hernia s/s
heartburn, regurgitation, and dyshagia, but at least 50% of patients are asymptomatic... may have fullness and chest pain after eating
With any hernia you have
the risk of hemorrhage, obstruction or strangulation
Hiatal Hernia is confirmed by
x-ray, barium swallow, and fluoroscopy
Diverticulum
is an outpouching of mucosa and submucosa that protrudes through a weak portion of musculature
Diverticulum s/s
difficulty swallowing, fullness in the neck, belching, regurgitation, gurgling noises while eating
Diverticulum may be confirmed by
Barium swallow, esophagoscpy
Foreign Bodies
Swallowing of a foreign body
Foreign bodies s/s
pain and dysphagia
Foreign bodies may be confirmed by
an x-ray
Chemical burns
swallowing of an acid or base that burns the esophagus may also happen from undissolved medication in the esophagus
Chemical burns s/s
emotional distraught as well as in acute pain, difficult breathing and swallowing
Gastrointestinal reflux disease commonly known as GERD
back flow of gastric or duodenal contents into the esophagus
GERD s/s
pyrois( burning sensation in the esophagus), dyspepsia(indigestion), regurgitation, dysphagia or odynophagia (pain on swallowing) hypersalivation, and esophagitis ( may mimic a heart attack)
GERD is confirmed by
endoscoy or barium swallow. ambulatory 12-36 hour esophageal pH monitoring is used to monitore the degree of acid reflux, bilirubin monitoring is used to measure bile reflux
Barrett's Esophagus
is a condition where the lining of the esophageal mucosa is altered typically associated with GERD
Barrett's Esophagus is confirmed by
esophagogastroduodenoscopy (EGD) as well as biopsies
Gastritis
inflammation of the stomach mucosa often caused by an irritant (food, medication, alcohol)
Gastritis s/s
abdominal discomfurt, headache, lassitude, nausea, anorexia, vomiting, hiccups...chronic gastritis s/s are anorexia, heartburn after eating, belching, sour taste in mouth or nausea and vomiting
Gastritis may be confirmed by
upper GI x-ray, endoscopy, histologic examination of a tissue
Helicobacter pylori
may cause chronic gastritis and prolonged inflammation
Gastritis is sometimes associated with achlorhydria
high or low levels of hydrochloric acid
What is peptic ulcer disease? (PUD)
develop in presence of acidic environment
erosion of the GI mucosa due to the digestive action HCl acid and pepsin
stomach lining erroded or torn away from HCL or pepsin
what is the connection between gastric ulcers and PUD?
In stomach, less common in the US, greater mortality rate, age >50 more likely to get gastric ulcers, usually result in obstruction
R/F- H. pylori, meds, smoking, bile reflux
what is the connection between duodenal ulcers and PUD?
more common in US,
can effect any age but usually 35-40 years old
R/F H. pylori is most common, smoking, alcohol,
What are clinical manifestations of Gastric ulcers?
Gastric- dyspepsia (upset stomach) high in upper gastric
1-2 hours after meals, burning feeling
if eroded clear through mucosa, food will aggravate even more, weight loss
what are complications of ulcers?
hemorrhage- most common, duodenal more likely to bleed
what layers of the bowel wall does ulcerative colitis affect?
mucosa and submucosa
Complications to constipation
hypertension, fecal impaction, hemorrhoids, fissures, and megacolon
Chronic diarrhea
persists for more than 2-3 weeks and may return sporadically
acute diarrhea
usually last 7-14 days
Complications of diarrhea
include potential for cardiac dysrhythmias because of significant fluid and electrolyte loss (especially loss of potassium)
Irritable bowl syndrome (IBS)
functional disorder if intestinal motility
Irritable bowl syndrome (IBS) s/s
alteration in bowl patterns; constipation to diarrhea or both. pain, bloating abd distension (feel better when you eat and poop)
Malabsorption
is the inability of the digestive system to absorb one or more of the major vitamins9 especially A and B12), miners (ie, iron and calcium)
Malabsorption s/s
diarrhea or frequent, loose, bulky, foul-smelling stools... have an increase fat content and are grayish
complication from Malabsorption
failure to absorb the fat-soluble vitamins A,D, and K causes a corresponding avitaminosis
complications from Appendicitis
is perforation of the appendix, which can lead to peritonitis, abscess formation (collection of purulent material)
Rovsing's sign
may be elicited by palpating the left lower quadrant; this paradoxically causes pain to be felt in the right lower quadrant
Diverticular disease
diverticulum is a saclike herniation of the lining of the bowl ( mostly in the sigmoid)
Diverticulosis
exists when multiple diverticula are present without inflammation or symptoms
Diverticulitis
results when food and bacteria retained in the diverticulum produce infection and inflammation that can impede drainage and lead to perforation or abscess formation
Peritonitis
is onflamation of the peritoneum, the serous membrane lining the abdominal cavity and covering the viscera... caused by leakage of contents form abdominal organs into the abdominal cavity
Peritonitis is confirmed by
white blood count is elevated, serum electrolyte studies and an x-ray
Duodenal ulcers S/S
has continuous and intermittent pain
2-5 hours after meal
burning, cramping in mid-gastric pain that can radiate to back
food can help protect- acid eats food
antacids combined with H2 receptor blockers and food, weight gain