Gastrointestinal Exam 1 Flashcards
(259 cards)
Afferent nerves
Towards CNS
Efferent Nerves
Away from CNS
Nausea
Feeling of needing of needing to vomit
Caused by an abnormality of gastric rhythmic disturbance
Vomiting
Emesis
Retching as well as other physiologic changes such as salivation, increased HR, etc.
Normal gastric rhythm
3 cycles per minute
4 sources of nausea
Afferent vagal fibers
Vestibular system fibers
Higher CNS centers - memory response
Chemoreceptor trigger rich zone
Succession splash
Heard in stomach indicating that food is not moving on
Early vs. Late obstruction
Hyperactive sounds early on
4 labs for nausea
CMC, CMP, Amylase and Lipase for pancreas, hCG
X-ray findings for nausea
Air filled bowel loops for ileus
EGD use in nausea
Often non-diagnostic but can rule out cancer or ulceration
Ondansetron (Zophran) class
5-HT3 receptor agonist
Ondansetron indications
Acute nausea vomiting
Postoperative
Chemo
Pregnancy AFTER 1st trimester
Contraindications/BBW for ondansetron
QT prolongation
1st trimester pregnancy
HA, COnstipation, Fatigue
Class of scopalamine
Anticholinergic/antihistamine
Indications for scopalamine
Motion sickness, vertigo, migraine
1st line in 1st trimester pregnancy when combined with B6 and doxylamine
Common side effects of scopalamine
Xerostomia, Urinary retention
Dizziness
Drowsiness
Pregnancy category C
Promethazine (Finnergan) MOA
Antihistamine, H receptor blocker
Can be given rectally
Indications of promethazine (Phenergan)
Acute N/V - can be given rectally
Side effects of phenergan
Respiratory depression
BBW - tissue injury or necrosis
CNS depression
Anticholinergic
Abnormal body movements
Metaclopramide MOA
Prokinetic - makes the GI tract move faster
Side effects of metaclopramide
Extrapyriamidal side effects/Tardive dyskenesia
Neuroplastic malignant syndrome
Diarrhea, drowsiness, restlessness
CI in seizures and GI obstruction
Other nausea meds - 3
Neurokinin - chemo with dexamethazone
Dexamethasone - Additive with chemo
Lorazepam - Benzo anticipatory to chemo
S. aureus food poisoning
Within 1-6 hours from prepared foods such as salads or dairy