bone biopsy- suspect OSA

Re: bone biopsy- suspect OSA

Richard Fox — Wed, 19 Jan 2011 11:27:32 GMT

From a path point of view - more the merrier and the softer the tissue the better :)

Re: bone biopsy- suspect OSA

Mark Holmes — Wed, 19 Jan 2011 11:15:33 GMT

Should be very straight forward, probebly best to familiarise yourself with radial nerve etc but will be easy to avoid. I would warn owners about risk of causing a pathological fracture but you need the biopsy and it is unlikely to happen. Actually its only really going to happen if it is a tumour or something nasty and hence requiring biopsy anyway.

Mark

Re: bone biopsy- suspect OSA

HMC — Wed, 19 Jan 2011 10:49:34 GMT

Right, dog is booked in for tomorrow. A 18g gauge Jamshidi needle has arrived. Any final words of wisdom for me? esp which aspect of the limb to approach the biopsy- I assume just guided by rads and patient positioning, avoiding any major blood vessels/nerves (which I will have to look up in a book).

Re: bone biopsy- suspect OSA

HMC — Tue, 11 Jan 2011 09:26:41 GMT

8g and 16g sound very different... are either (or anything in between) suitable then?

Re: bone biopsy- suspect OSA

Michael Woodhouse — Mon, 10 Jan 2011 21:48:44 GMT

[quote user="robloxley"]We use the 8g VI disposable Jamshidi needles from Vet Inst. You can get reusable ones but they are much more expensive and blunt easily. Can't remember offhand if Dunlops were stocking these, anyway if ordered by post they usually arrive next day.[/quote]

Dunlops list 11G, 13G, 15G & 18G Jamshidi needles.

Re: bone biopsy- suspect OSA

Rob Loxley — Mon, 10 Jan 2011 19:59:35 GMT

[quote user="Hannah Chilton"]What are the options for jamshidi needles? Do they come in different sizes?[/quote]

We use the 8g VI disposable Jamshidi needles from Vet Inst. You can get reusable ones but they are much more expensive and blunt easily. Can't remember offhand if Dunlops were stocking these, anyway if ordered by post they usually arrive next day.

Re: bone biopsy- suspect OSA

Richard Fox — Mon, 10 Jan 2011 15:36:36 GMT

Oh put them in a small 1 or 2 ml vials of formal saline and remove all air and then they will be less likely to fragment :)

Re: bone biopsy- suspect OSA

HMC — Mon, 10 Jan 2011 15:28:32 GMT

Thank you.

Re: bone biopsy- suspect OSA

Richard Fox — Mon, 10 Jan 2011 14:53:21 GMT

More the merrier IMO Seriously I would suggest at least decent 3 cores if you can and as Andrew said the softer areas are both easier to biopsy and are more likely to yield an answer - Perhaps guided by your radiograph (i.e. lucent areas)

Re: bone biopsy- suspect OSA

Andrew Mellor — Mon, 10 Jan 2011 14:46:34 GMT

Surprisingly easy to do stab incision through soft tissues I would use 2 inch 16guage Jamshidi ( vet instrumentation), I generally find if it is Osteosarc bone is very soft easy to get nice samples.

Richard probably can advise you best on what to do with the core sample once you have collected it/them, I would always take more than one.

Re: bone biopsy- suspect OSA

Richard Fox — Mon, 10 Jan 2011 09:40:44 GMT

I won't suggest the practical methods as I am sure you will get better advice from others - What I would suggest is aim for the lytic areas and not the proliferative new bone as the latter does not usually yields tumour if that is the underlying problem. Sometime aspirates can be useful but generally not diagnostic or definitive :) And as most pathologists would suggest the more the merrier :)