Using CT perfusion during the early baseline period in aneurysmal subarachnoid hemorrhage to assess for development of vasospasm
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Pina C. Sanelli & Austin Jou & Rachel Gold & Melissa Reichman & Edward Greenberg &Majnu John & Zuzan Cayci & Igor Ugorec & Axel Rosengart
- چاپ و سال / کشور: 2011
Description
Introduction The aim of this study is to evaluate computed tomography perfusion (CTP) during admission baseline period (days 0–3) in aneurysmal subarachnoid hemorrhage (A-SAH) for development of vasospasm. Methods Retrospective analysis was performed on A-SAH patients from Dec 2004 to Feb 2007 with CTP on days 0–3. Cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) maps were analyzed for qualitative perfusion deficits. Quantitative analysis was performed using region-of-interest placement to obtain mean CTP values. Development of vasospasm was determined by a multistage hierarchical reference standard incorporating both imaging and clinical criteria. Student's t test and threshold analysis were performed. Results Seventy-five patients were included, 37% (28/75) were classified as vasospasm. Mean CTP values in vasospasm compared to no vasospasm groups were: CBF 31.90 ml/100 g/min vs. 39.88 ml/100 g/min (P<0.05), MTT 7.12 s vs. 5.03 s (P<0.01), and CBV 1.86 ml/100 g vs. 2.02 ml/100 g (P=0.058). Fifteen patients had qualitative perfusion deficits with 73% (11/15) developed vasospasm. Optimal threshold for CBF is 24–25 mL/100 g/min with 91% specificity and 50% sensitivity, MTT is 5.5 s with 70% specificity and 61% sensitivity and CBV is 1.7 mL/ 100 g with 89% specificity and 36% sensitivity. Conclusion These initial results support our hypothesis that ASAH patients who develop vasospasm may demonstrate early alterations in cerebral perfusion, with statistically significant CBF reduction and MTT prolongation. Overall, CTP has high specificity for development of vasospasm. Future clinical implications include using CTP during the baseline period for early identification ofA-SAH patients at high risk for vasospasm to prompt robust preventative measures and treatment.
Neuroradiology (2011) 53:425–434 DOI 10.1007/s00234-010-0752-z
