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51 Cards in this Set
- Front
- Back
Nociceptors are located within _____ and ____
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mucosa/muscularis of hollow viscera
serosal surface of peritoneum and mesentary |
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Nociception is mediated by ____ fibers and _____ fibers
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A-delta fibers
C-fibers |
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A-delta fibers are located in skin and muscle and are ____ conducting fibers associated with _____ types of pain
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rapidly-conducting
sharp, sudden and well-localized |
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C-fibers are located in muscle, periosteum, mesentary, peritoneum, and viscera and are ____ conducting fibers associated with ____ types of pain
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slow-conducting
dull, burning and poorly localized pain with slower onset and longer duration |
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_____ is the primary type of nociception for the abdominal viscera
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C-fiber
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Afferent neurons in the GI tract discharge in response to _______
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luminal chemicals
mechanical deformation of terminal fields cytokines/inflammatory mediators endocrine cells mast cells |
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Efferent neurons in the GI tract have what function?
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influence secretion, motility, and possibly supply blood vessels directly
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First-order neurons innvervating the viscera carry information to the ______ and synapse at the _____
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thoracolumbar SNS
dorsal horn of the spinal cord |
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Second-order neurons _______ and ascend the ______ to synapse at the _____ before proceeding to the ______
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cross
spinothalamic / spinoreticular tracts thalamus limbic / somatosensory areas |
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Name the 3 types of abdominal pain
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Visceral
Somatic Referred |
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Visceral pain is ______ in quality as a result of ______
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dull and poorly-localized to the midline
bilateral spinal cord transmission of sensory afferents by the organs |
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A patient will describe VISCERAL adbominal pain as ______ in quality; secondary autonomic effects of visceral pain include
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cramping, burning, or gnawing
sweating, restlessness, nausea, vomiting |
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SOMATIC pain is described as ______ and due to
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more intense and more precisely localized than visceral
irritation of the parietal peritoneum |
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An excellent example of somatic pain is
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the early vague periumbilica visceral pain of appendicitis eventually localizes to McBurney's point with increased peritoneal irritation
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SOMATIC pain is generally worsened by
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movement / coughing
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REFERRED abdominal pain is due to
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convergence of visceral afferent neurons with somatic afferent neurons from different anatomical regions on second-order neurons in the same spinal cord segment
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Two stimuli of VISCERAL pain include
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mechanical
chemical |
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The primary stimulus in MECHANICAL-caused induction of visceral pain is _____, NOT _____!
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stretching
cutting, tearing or crushing |
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Examples of mechanically-induced visceral pain include
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Stretching things
rapid distention (obstruction) forceful muscular contractions (biliary or renal colic) mesenteric torsion (cecal volvulus) traction on mesentary or vessels |
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Chemical stimuli in VISCERAL pain include
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local mechanical, inflammatory, ischemic, noxious thermal or radiation that releases certain subtances (H, K, histamine, substance P, etc)
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Chemical-induced visceral pain is basically due to
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Accumulation of nocireactive substances which decrease the pain threshold by alterting the microenvironment of the injured tissue
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Changes in location during the H/P of abdominal pain may indicate
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progression from visceral to somatic pain (ie appendicitis)
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Aggravating/alleviating factors related to the following:
peritonitis renal colic biliary colic duodenal ulcer gastric ulcer |
pt lies motionless
pt listless and writhes triggered by fatty-food ingestion pain alleviated by meals exacerbated with eating |
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Pts who are writhing and listless most likely have _____ pain
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visceral pain
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Pts lying still and reluctant to move in obvious distress most likely have ____
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peritonitis
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Hyperactive bowel sounds indicate ______, while hypoactive indicate ____
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obstruction
ileus |
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Normal liver span is _____
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10-12cm at MCL
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When doing an abdominal exam, always begin _______
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at the point of LEAST TENDERNESS
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Serologic eval in abdominal pain should include
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CBC w/ diff, UA, BMP
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The imaging study of choice for hepatobiliary, kidneys, and pelvic organs is ____
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US
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Mechanisms of dysphagia include
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Dysmotility
Mechanical GERD |
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Mechanical causes of dysphagia include
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Narrowing of esophageal lumen with dysphagia severity relating to the degree of obstruction, associated esophagitis, and type of food
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Defects in oral preparation leading to oropharyngeal dysphagia include
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disruption in the coordination of jaw, facial and buccal muscles, lips, saliva, teeth, etc. that impede the break down of food and mixing with saliva
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Defects in oral transfer leading to oropharyngeal dysphagia include
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inhibition of the tongue moving upwards and backwards to propel bolus into esophagus
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In oropharyngeal dysphagia, the pt is often aware that
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bolus has not left the oropharynx and will localize discomfort to the cervical esophagus
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Complications of oropharyngeal dysphagia include
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aspiration or nasal regurgitation (coughing during meal)
hoarseness (d/t recurrent laryngeal nerve dysfunction or instrinsic muscle disease leading to vocal cord impairment) dysarthria, nasal speech, pharyngonasal regurgitation d/t weakness of soft palate or pharyngeal mm |
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Localization in esophageal dysphagia is
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substernal
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3 crucial questoins to ask in the eval of esophageal dysphagia include
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Type of food causes the sxs?
Is the dysphagia intermittent or progressive? Does the pt have heartburn? |
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Dysphagia to both solids AND liquids indicates a(n) ...
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esophageal dysmotility disorder
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Dysmotility disorders are often relieved by ...
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repeated swallowing
raising arms over head valsalva maneuver |
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Achalasia is
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painless regurgitation of undigested foods, usually at night, with wt loss
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Spastic motility disorders are characterized by
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chest pain with hot or cold sensitivities
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Scleroderma is characterized by
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accompanied by severe GERD and dysphagia; generally related to peptic strictures
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Dysphagia to SOLIDS only indicates ...
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mechanical obstruction
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Episodic and nonprogressive dysphagia is usually _____ and epitomized by
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benign
"steakhouse syndrome" (hastily eating a meal with or without EtOH) |
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Progressive dysphagia may indicate
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mechanical stricture (severity worsens with worsening obstruction); pt may regurgitate to relieve food impaction
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Benign (peptic) strictures are characterized by
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Long-standing hx of GERD
No wt loss |
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Malignant strictures clinically look how?
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Old pts with rapidly-progressive dysphagia without reflux
anorexia leading to profound wt loss beyond severity of sxs |
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Odynophagia is ...
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pain with swallowing due to severe inflammatory process involving the esophageal mucosa
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Globus sensation is
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feeling a lump or tightness in throat unrelated to swallowing
most common in middle-aged women psych factors likely involved |
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A key important HX in diagnosing noncardiac chest pain
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triggered by hot or cold foods
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