Research Article| Volume 29, ISSUE 6, 104812, June 2020

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Relationship between Hematoma Volume and Motor Impairment in Putaminal Hemorrhage


      Purpose: Computed tomography (CT) is used for initial assessment of patients with suspected stroke. Motor outcome prediction using the initial CT image is important for clinical rehabilitation. However, there is inconsistency in the results reported by the few publications on hematoma volume and motor outcomes in patients with putaminal hemorrhage. To clarify the direction of hematoma and relationship between the hematoma volume and motor outcomes in patients with putaminal hemorrhage using an initial CT image, we evaluated the volume of direction of hematoma in 170 patients in the subacute phase after putaminal hemorrhage using CT at stroke onset. Methods: The patients were divided into 5 groups according to the direction of the hematoma. For each group, Spearman's correlation coefficients were calculated to investigate the relationship between hematoma volume and motor outcomes. Motor outcomes were assessed using the motor items of Stroke Impairment Assessment Set, which are impairment indexes for the distal and proximal functions of the upper and lower extremities after stroke. Results: Hematoma volume was significantly correlated with all the motor items in the group whose hematoma extended to the posterior limb of the internal capsule alone (Bonferroni corrected P <.05). On the other hand, significant correlations between hematoma volume and motor outcomes could not be found in almost all the other groups. Conclusions: Motor outcome after putaminal hemorrhage can be predicted by evaluating the progression of hematoma to the corticospinal tract and its volume using CT images at stroke onset.

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