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Abstract

Sensitivity and specificity of fluid-blood levels for coagulopathy in acute intracerebral hematomas.

M J Pfleger, E P Hardee, C F Contant and L A Hayman
American Journal of Neuroradiology February 1994, 15 (2) 217-223;
M J Pfleger
Department of Radiology, Baylor College of Medicine, Houston, TX 77030.
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E P Hardee
Department of Radiology, Baylor College of Medicine, Houston, TX 77030.
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C F Contant Jr
Department of Radiology, Baylor College of Medicine, Houston, TX 77030.
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L A Hayman
Department of Radiology, Baylor College of Medicine, Houston, TX 77030.
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Abstract

PURPOSE To characterize the imaging features of intracerebral hemorrhages in coagulopathies that alter prothrombin time or partial thromboplastin time.

METHODS A fluid-blood level was defined as a horizontal interface between hypodense bloody serum layered above hyperdense settled blood. The prevalence of fluid-blood levels in acute intracerebral hemorrhages was determined on third-generation CT scans in 32 patients with elevation in prothrombin time or partial thromboplastin time. This was compared with the frequency of fluid-blood levels in 185 patients with intracerebral hemorrhage in which there was no laboratory evidence of coagulopathy.

RESULTS The probability of finding a fluid-blood level in an intracerebral hemorrhage of a patient with abnormal prothrombin time or partial thromboplastin time was 59% (sensitivity). The probability that there will be no fluid-blood level in a patient with a normal prothrombin time and partial thromboplastin time was 98% (specificity).

CONCLUSION Fluid-blood levels in acute intracerebral hemorrhage are moderately sensitive to the presence of coagulopathy (ie, abnormal prothrombin time and partial thromboplastin time) and highly specific for this condition. Thus, an intracerebral hemorrhage with a fluid-blood level should prompt a thorough search for coagulopathy because early treatment of this condition may improve the 40% mortality in these patients. Caution should be used to distinguish the horizontal interface of a fluid-blood level from a clot with a flat top. A decubitus CT is useful in these rare instances.

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American Journal of Neuroradiology
Vol. 15, Issue 2
1 Feb 1994
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Sensitivity and specificity of fluid-blood levels for coagulopathy in acute intracerebral hematomas.
M J Pfleger, E P Hardee, C F Contant, L A Hayman
American Journal of Neuroradiology Feb 1994, 15 (2) 217-223;

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Sensitivity and specificity of fluid-blood levels for coagulopathy in acute intracerebral hematomas.
M J Pfleger, E P Hardee, C F Contant, L A Hayman
American Journal of Neuroradiology Feb 1994, 15 (2) 217-223;
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