Anatomic sites examined:
(1) 10 basal cisterns and fissures
(2) 4 ventricles
Basal cisterns and fissures:
(1) frontal interhemispheric fissure
(2) left Sylvian fissure, lateral part
(3) right Sylvian fissure, lateral part
(4) left Sylvian fissure, basal part
(5) right Sylvian fissure, basal part
(6) left suprasellar fissure
(7) right suprasellar fissure
(8) left ambient cistern
(9) right ambient cistern
(10) quadrigeminal cistern
Ventricles:
(1) left lateral
(2) right lateral
(3) third
(4) fourth
|
Amount of Blood
|
Points
|
|
none
|
0
|
|
small amount
|
1
|
|
moderate amount
|
2
|
|
completely filled with blood
|
3
|
subscore for basal cisterns and fissures =
= SUM(points for all 10 basal cisterns and fissures)
subscore for ventricles =
= SUM(points for all 4 ventricles)
total score =
= (subscore for basal cisterns and fissures) + (subscore for ventricles)
Interpretation:
• minimum for subscores and total score: 0
• maximum subscore for basal cisterns and fissures: 30
• maximum subscore for ventricles: 12
• maximum total score: 42
The rate of clearance of blood after surgery can be calculated as:
percent clearance of blood after surgery =
= ((total score on admission) - (total score on day after surgery)) / (total score on admission) * 100%
