Intrathecal catheter with port for multiple intrathecal deliveries in mouse?

Hey all,
I want to do repeated doses of drug to the mouse intrathecal space without needing to do an i.t. injection every time. i.t. injections are fine, but it’d be nice to already have the mice ready to go and just push a drug, perhaps multiple times.

I know there are options to do chronic drug infusion with an Alzet pump, like this procedure from @anackley lab.

But I’m looking for options with a port for acute dosing.

Does anyone have any recommendations for catheters and maybe a protocol?

@tberta @liz @esypek @ljmartin