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Incision and reflection of dura

Tue Jul 11 12:26:29 EST 1995

In article <3thhkh$air at mojo.eng.umd.edu>
didier at eng.umd.edu (Didier A. Depireux) writes:
>During surgery on a mammal, we perform a small (5mm by 5mm) craniotomy,
>and we want to expose the underlying cortex for single electrode recordings.
>For this, we have to incise and reflect the dura, but I am not satisfied
>with our method. Basically, we take very fine forceps and iridectomy
>scissors, rub the forceps on the dura until, at some point, something
>in the dura actually gets caught by the forceps, lift the dura, cut it
>and further resect it with the scissors.
>When you do that, it really feels like you are rubbing against the dura
>until something breaks on it, and you use the slit you just made to lift
>the dura, pia and arach. membrane and cut through the meninges. It seems
>to me that there should be a better way.
>What do people on this group do when they are faced with having to expose
>cortex? How do neurosurgeons do it with humans, without (obviously)
>damaging the underlying cortex?
>                                        Didier
>                                        didier at src.umd.edu
 I used a similar technque with dura. Following the craniotomy I
used a small dura hook fashioned of  a 19 guage hypodermic needle.
I simply baged the end gently on a hard surface to form a hook. I
could then lift the dura and incise it where I wished. This left
a sufficient opening for placement of a micropipette.
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