Patho 2 - Exam 1 - Gastroinstestinal System Flashcards
Nausea
feeling the urge to vomit
Retching
process of vomiting without vomiting
Vomiting
forceful oral expulsion of gastric contents
Vomiting Center
Triggered by: gitract high brain stem cortical centers ctz (Chemoreceptor trigger zone)
CTZ
Chemoreceptor trigger zone
Can't initiate, only a trigger Triggered by drugs bacterial toxins metabolic abnormalities
GI Bleeding - 4 types
Upper
Lower
Acute
Occult
Upper GI Bleeding
ulcers in esophagus, stomach or duodenum, gastric tears from malignancy
Lower GI Bleeding
caused by polyps in the jejunum, ileum, colon, or rectum, IBS, cancer or hemorrioids
Acute GI Bleeding
Hematemesis - blood in vomit
Hematochezia - frank bleeding from rectum
Melena - black tarry stool
Occult GI Bleeding
trace amounts of blood in normal appearing stool or gastric secretions
Can detect with Guaiac Test
Dysphagia
Difficulty with swallowing is the sensation that food is stuck in the throat
Who’s at Risk?
old, young, neurologic disorders
Patho - Dysphagia
mechanical
functional
Achalasia - rare form
Clinical Manifestations of Dysphagia
Odynophagia - pain with swallowing
Choking or coughing while eating
GERD
Backflow of gastric or duodenal contents into the esophagus pass to the lower esophageal sphincter
GERD- who’s at risk?
prolonged gastric intubation infections systemic disease acidic foods systemic diseases
GERD - Patho
LES is weakened or incompetent, epithelial cell damage
GERD- Clinical Manifestations
dyspepsia, eructation (frequent belching) pain after eating, when lying down, and after straining or lifting
Peptic Ulcer
erosion in the lining of the esophagus, stomach or duodenum
Peptic Ulcer - who’s at risk?
COPD, rheumatoid arthritis or cirrhosis, H. pylori infection, stress, smoking, excessive use of NSAIDS or aspirin
Peptic Ulcer - patho
excess acid, decreased mucus, increased delivery of acid
Peptic Ulcer - clinical manifestations
gastric - caused by NSAIDS pain, worsens with eating pain in back or flank duodenal - caused by H. pylori gnawing dull ache epigastric relieved by food or antacids recurs 2-4 hours later
IBS
abdominal pain, alternating constipation and diarrhea, abdominal distention
IBS- who’s at risk?
ppl with stress, lactose intolerant, food sensitivities, colon cancer, food poisoning. 2xx as common in women then men. 20% of pts never seek medical attention
IBS - patho
GI tract appears normal, abnormal smooth muscle function of the colon, excessive peristalsis and spasms
IBS- clinical manifestations
intermittent, crampy, lower abdominal pain