What is the sensitivity of CT for SAH?
What is the sensitivity of CT for SAH?
CT without contrast is the most sensitive imaging study in SAH (see the images below). When carried out within 6 hours of headache onset, CT has 100% sensitivity and specificity. Sensitivity is 93% within 24 hours of onset, 80% at 3 days, and 50% at 1 week.
Is there a role for lumbar puncture in early detection of subarachnoid hemorrhage after negative head CT?
Subarachnoid hemorrhage diagnosis: lumbar puncture is still needed when the computed tomography scan is normal. Acad Emerg Med.
When do you use LP for SAH?
An LP is performed to evaluate the cerebrospinal fluid for the presence of red blood cells (RBCs) and xanthochromia. LP may be negative if performed less than 2 hours after an SAH occurs; LP is most sensitive 12 hours after onset of symptoms.
How sensitive is CT for stroke?
The pooled sensitivity of CTP for acute ischemic stroke was 82% (95% CI 75–88%), and the specificity was 96% (95% CI 89–99%).
How are sah graded?
The Fisher grading system is used to classify SAH, as follows: Grade 1 – No subarachnoid blood seen on CT scan. Grade 2 – Diffuse or vertical layers of SAH less than 1 mm thick. Grade 3 – Diffuse clot and/or vertical layer greater than 1 mm thick.
Which of the following neuroimaging studies is most sensitive in detecting early signs of an ischemic stroke Mcq?
MRI is more sensitive in comparison with CT in detection of ischemic lesion, while DWI does not show dominance in comparison with MRI in identification of ischemic stroke after 48 hours of the symptoms onset.
Is nifedipine the same as nimodipine?
Conclusion: Nimodipine is comparable with Nifedipine and can be used as an alternative drug in the treatment of hypertension in pregnancy as it is safe, effective and with minimal side effects. As it is more expensive than Nifedipine in country like India, Nifedipine continues to be the first line drug.
