[Relationship between classification of CSDH according to the Internal architecture and hematoma contents].

Background: Based on the finding of temporal changes in the internal architecture on CT scans, we classified CSDH into 4 types: the homogeneous type, the laminar type, the separated type, and the trabecular type. The purpose of this study was to statistically analyze the relationship between the type of CSDH and the hematoma contents.

Methods: This study assessed 45 consecutive CSDH patients. All of them were assigned to our 4 types of CT classification of CSDH, and the counts of blood cells including WBC, RBC, Hb, Ht, and platelets, as well as FDP and fibrinogen levels in the hematoma and peripheral venous blood were examined.

Results: The mean RBC count was 345.3 (SD = 177.9) in all the subjects versus 426.4 (SD = 165.6) in Hm, 408.3 (SD = 79.2) in Lm, 357.2 (SD = 298.7) in Sp, and 200.0 (SD = 129.2) in Tr. The mean Hb concentration was 10.2 (SD = 5.2) in all the subjects versus 12.9 (SD = 5.3) in Hm, 12.3 (SD = 2.7) in Lm, 9.2 (SD = 6.5) in Sp, and 5.9 (SD = 4.2) in Tr. The eosinophil and lymphocyte counts were high in all the types (15.0% and 48.4% on average). The FDP concentration was high in all patients (500-5,000). Fibrinogen levels were less than 10 in all hematoma types. CRP was an average of 3.1 (SD = 4.9) in all the subjects versus 7.5 (SD = 9.8) in Hm, 2.5 (SD = 1.6) in Lm, 3.0 (SD = 2.9) in Sp, and 1.1 (SD = 1.6) in Tb.

Conclusion: There were relationships between the type of CSDH and the RBC, Hb, Ht, and CRP values.