Which scale is used for SAH?

The most widely used method for clinical grading of SAH is the Hunt and Hess Scale (Table 5-2).

What parameters require close monitoring for patients after subarachnoid hemorrhage?

The routine monitoring of all acute SAH patients should include serial neurological examinations, continuous EKG monitoring, and frequent determinations of blood pressure, electrolytes, body weight, fluid balance, and, in many centers, transcranial doppler (TCD) (70-72).

What is Fisher grade?

The Fisher grade, developed in 1980, is commonly used to predict the risk of cerebral vasospasm after subarachnoid hemorrhage (SAH) based on the amount of blood shown on initial CT scans within 5 days of SAH (for more information, see Imaging in Subarachnoid Hemorrhage).

What is Fisher classification?

The Fisher scale is the initial and best known system of classifying the amount of subarachnoid hemorrhage on CT scans, and is useful in predicting the occurrence and severity of cerebral vasospasm, highest in grade 3 2.

When do you start nimodipine for SAH?

Nimodipine should start as early as possible or within 96 hours of the diagnosis of subarachnoid hemorrhage. The recommended dose for adults is 60 mg (two 30-mg capsules) every 4 hours for 21 consecutive days.

How is subarachnoid hemorrhage measured?

To diagnose a subarachnoid hemorrhage, your doctor is likely to recommend: CT scan. This imaging test can detect bleeding in your brain. Your doctor may inject a contrast dye to view your blood vessels in greater detail (CT angiogram).

How is Fisher score calculated?

The score of the i-th feature Si will be calculated by Fisher Score, Si=∑nj(μij−μi)2∑nj∗ρ2ij where μij and ρij are the mean and the variance of the i-th feature in the j-th class, respectivly, nj is the number of instances in the j-th class and μi is the mean of the i-th feature.

What is W in Fisher criterion?

This defines the Fisher criterion, which is maximized over all linear projections, w: (9) where m represents a mean, s2 represents a variance, and the subscripts denote the two classes. In signal theory, this criterion is also known as the signal-to-interference ratio.

Is the Fisher revised scale an alternative for evaluating subarachnoid hemorrhage?

The Fisher revised scale (FRS) presents an alternative for evaluating patients with subarachnoid hemorrhage (SAH). In this study, we compared the prognosis of patients with SAH and vasospasms (VSP).

Does the Fisher grading scale predict outcome in patients with SAH?

The Fisher grading scale has been used to predict patients in risk of developing vasospasm. Improved radiological techniques and treatment may have changed the relevance of the Fisher scale. We have now evaluated the Fisher scale, Hunt and Hess and age in relation to outcome in patients with SAH.

What is a Grade 4 on the Fisher scale of IVH?

in Fisher scale any IVH is grade 4, irrespective of presence of SAH (in modified Fisher scale it is either grade 2 if thin or no SAH, or grade 4 if thick SAH) 1. Shaw A, Godfrey E, Singh A. Radiology, Clinical Cases Uncovered.

What is the prognosis of subarachnoid hemorrhage (NPM-Sah) in elderly patients?

Elderly patients, and especially the subgroup with a Fisher Scale 3 bleeding pattern, had a high risk for an unfavorable outcome, whereas the subgroup of Non perimesencephalic subarachnoid hemorrhage NPM-SAH without a Fisher Grade 3 bleeding pattern had a favorable outcome, similar to perimesencephalic subarachnoid hemorrhage (PM)-SAH.