What is the gold standard diagnostic test for SAH within the first 6 hrs and beyond 6 hrs support ur answer with evidence

Reading File
Now I'll run parallel searches across the medical library and PubMed simultaneously.
Finding Sources
Finding Sources
Searching PubMed

"subarachnoid hemorrhage" AND "CT angiography" AND "lumbar puncture" AND diagnosis

Searching PubMed

"subarachnoid hemorrhage" AND "xanthochromia" AND "lumbar puncture"

Good results. Now let me read the key textbook sections in parallel and run a more targeted PubMed search.
Reading File
Reading File
Reading File
Searching PubMed

"subarachnoid hemorrhage" AND "computed tomography" AND sensitivity diagnosis

Excellent. Let me get the abstracts of the most relevant PubMed papers and read more of the Tintinalli LP section, plus search for the Perry et al. landmark study.
Reading Article

PMID: 35361627

Reading Article

PMID: 38772769

Reading File
Searching PubMed

"subarachnoid hemorrhage" AND "six hours" AND "CT scan" AND sensitivity

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