B5.015 Abdominal Pain The Big Case Flashcards
types of pain
visceral
somatic-parietal
referred
transmission of visceral pain
transmitted by C fibers that are found in muscle, peritoneum, mesentery, periosteum and viscera
- most painful stimuli from abdominal viscera are conveyed by these types of fiber
- highly sensitive to distention, inflammation, and ischemia
characteristics of visceral pain
dull, cramping, burning, gnawing, squeezing, deep, sickening
poorly localized and more gradual in onset
often can be referred to a more distant superficial structure
why is visceral pain usually perceived in the midline
abdominal organs transmit sensory afferents to both sides of the spinal cord
3 regions of abdominal visceral pain
foregut = epigastric midgut = periumbilical hindgut = suprapubic
secondary autonomic effects of visceral pain
sweating, restlessness, nausea, vomiting, perspiration, and pallor
why may visceral pain have secondary autonomic effects?
pathways of visceral afferent fibers that mediate pain travel with autonomic nerves to communicate with the CNS
vagal and pelvic parasympathetic nerves
somatic parietal pain transmission
mediated by alpha gamma fibers that are distributed principally to the skin muscle
characteristics of somatic-parietal pain
sharp, stabbing, well localized
usually aggravated by movement or vibration
why is there lateralization of somatic parietal pain
only one side of the nervous system innervates the given part of the parietal peritoneum
referred pain
pain felt in areas removed from the diseased organ and results when visceral afferent neurons and somatic afferent neurons from a different anatomic region converge on second order neurons in the spinal cord at the same spinal segment
example of referred pain
gallbladder inflammation can irritate the diaphragm which is innervated by C3,4,5
dermatomes of these spinal cord segments supply the shoulder
Kehr’s sign
diaphragmatic irritation from a subphrenic hematoma or splenic rupture being perceives as shoulder pain
chronological patterns of pain
- subside spontaneously with time
- colicky- pain progresses and remits
- progressive
- catastrophic onset
appendicitis pain
gradual periumbilical early, RLQ late diffuse early, localized late ache no radiation
cholecystitis pain
acute RUQ localized constricting radiation to scapula
pancreatitis pain
acute
epigastrium, back
localized
midback radiation
diverticulitis pain
gradual LLQ localized ache no radiation
perforated peptic ulcer pain
sudden epigastric localized early, diffuse later burning no radiation
small bowel obstruction pain
gradual periumbilical diffuse cramping no radiation
mesenteric ischemic pain
sudden periumbilical diffuse agonizing no radiation
ruptured AAA
sudden abdomen, back, flank diffuse tearing no radiation
gastroenteritis pain
gradual periumbilical diffuse spasmodic no radiation
pelvic inflammatory disease pain
gradual either LQ, pelvis localized ache radiation to upper thigh