These days it would depend very much on your gin. Newer trendy gins can have some odd tints and lack of clarity dependent of what new and exciting botanicals
have been used. You need to stick with a good old fashioned London or even better Plymouth gin for your standard crystal (gin) clear.
To go back to the A and E consultants approach and in agreement with many other replies; Clinical acumen in selecting the right population to LP is the key.
Late presenting SAH is picked up very well by Spectrophotometry when missed by CT: but if you LP everyone coming in with a headache and negative CT bang on 12 hours it is rubbish.
Rachel
From: Clinical biochemistry discussion list [mailto:[log in to unmask]]
On Behalf Of Myers Martin (LTHTR)
Sent: 22 April 2016 09:28
To: [log in to unmask]
Subject: [[SPAM]] - Re: An A&E consultant's take on CSF xanthochromia
We don’t need to go back as far as Varley.
Neurology: A Queen Square Textbook. Charles Clarke, Robin Howard, Martin Rossor, Simon D. Shorvon. John Wiley & Sons, 9 Sep
2011
“Normal CSF is crystal (gin) clear when held to the light!”
I wonder what normal Russian CSF looks like
In the days before quantitation the cliché was that you looked for gin-clear CSF against a bright blue sky…
…anyone got an old Varley to check?
Jonathan
- visual inspection of a sample is too subjective to be a useful test in modern practice. One would need perfect eyesight, perfect lighting conditions and crystal clear
CSF. Due to the consequences of missing a bleed, I imagine that most practitioners could convince themselves that every CSF sample was yellow!
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