Catheter Balloon Inflation 1

[sph99]

Hi

I'm new to bioengineering but I've been asked to calculate the theoretical inflation time for a catheter balloon. Can any one point me in the right direction? Any guidance appreciated.

 

[IRstuff]

vpl, I'm absolutely in agreement; my comments were solely directed to the OP

TTFN
faq731-376

 

[msquared48]

My inflatable bladder takes 550 cc's and takes 15 seconds to either fill or empty.

Just thought you'd want to know.

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[sph99]

Thanks vpl, IRstuff and msquared48.

Crane was helpful in getting to grips with what I should be looking for and I have made progress since starting to read it.

However, while I am getting closer to solving the problem, I think the long tube with an diameter of less than 1mm is affecting my results. I have a hand pump which feeds into the long tube. The tube widens out into the balloon. I have called it a balloon but it does not display the properties of a balloon. It is already expanded into shape and then a vacuum is pulled on the whole system.

I would like to initially solve the problem assuming that there are no forces acting on the outside other than atmospheric pressure, and the balloon does not resist inflation. When I get this much done I will then have to look at the case where the balloon begins to expand as the pressure increases.

 

[vpl]

sph99,

I admit you are well outside my area of expertise. My only "experience" with catheter balloons is when nuclear medicine procedures go wrong and a catheter balloon is somehow involved ... and one of the inspectors draws me a diagram to explain how someone ended up receiving a dose of radionuclides in this area here instead of where it was planned over here ... <I think my profile mentions I no longer do engineering for a living and I come here for sanity's sake.>

I'm glad Crane put you on the right track. There is a description in Section 1 (I think) about long thin tubes that might bear reading. It affects the formula that you use.

Patricia Lougheed

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