Heparin-induced thrombocytopenia CT: Difference between revisions
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{{Heparin-induced thrombocytopenia}} | {{Heparin-induced thrombocytopenia}} | ||
{{CMG}}; | {{CMG}}; {{shyam}} | ||
==Overview== | ==Overview== | ||
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==CT== | ==CT== | ||
CT scan is not specific for a diagnosis of HIT, but a CT scan can be useful to assess for thrombotic manifestations of HIT, such as stroke, pulmonary embolism, mesenteric ischemia, intraabdominal or retroperitoneal bleeding, or acute limb ischemia. | |||
* '''CT of the head''' in a patient with thrombotic stroke can show hypodensity suggestive of infarcted brain tissue. Alternatively, intracranial bleeding from thrombocytopenia will present radiographically as a hyperdensity on CT. | |||
* '''CT of the chest''' in a patient with pulmonary embolism from HIT can show Hampton's hump, Westermark's sign, or Fleischner's sign, similar to a chest X-ray. | |||
* '''CT of the abdomen or pelvis''' in a patient with mesenteric ischemia can show evidence of bowel necrosis. A retroperitoneal bleed or intraabdominal bleed from thrombocytopenia will show hyperdensity in the area of the bleeding. | |||
* '''CT of the extremities''' in a patient with acute limb ischemic can show evidence of an ischemic limb. CT should be done with a runoff study to visualize the passage of dye through the arterial or venous circulation of the extremity. | |||
==Reference== | ==Reference== | ||
Revision as of 23:52, 14 July 2017
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Heparin-induced thrombocytopenia |
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Differentiating Heparin-induced thrombocytopenia from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Heparin-induced thrombocytopenia CT On the Web |
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American Roentgen Ray Society Images of Heparin-induced thrombocytopenia CT |
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Directions to Hospitals Treating Heparin-induced thrombocytopenia |
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Risk calculators and risk factors for Heparin-induced thrombocytopenia CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Shyam Patel [2]
Overview
CT
CT scan is not specific for a diagnosis of HIT, but a CT scan can be useful to assess for thrombotic manifestations of HIT, such as stroke, pulmonary embolism, mesenteric ischemia, intraabdominal or retroperitoneal bleeding, or acute limb ischemia.
- CT of the head in a patient with thrombotic stroke can show hypodensity suggestive of infarcted brain tissue. Alternatively, intracranial bleeding from thrombocytopenia will present radiographically as a hyperdensity on CT.
- CT of the chest in a patient with pulmonary embolism from HIT can show Hampton's hump, Westermark's sign, or Fleischner's sign, similar to a chest X-ray.
- CT of the abdomen or pelvis in a patient with mesenteric ischemia can show evidence of bowel necrosis. A retroperitoneal bleed or intraabdominal bleed from thrombocytopenia will show hyperdensity in the area of the bleeding.
- CT of the extremities in a patient with acute limb ischemic can show evidence of an ischemic limb. CT should be done with a runoff study to visualize the passage of dye through the arterial or venous circulation of the extremity.