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Catheter Balloon Inflation 1
- Thread starter sph99
- Start date
msquared48
Structural
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
Just thought you'd want to know.
Mike McCann
MMC Engineering
- Thread starter
- #23
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.
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.
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1
- #24
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
******
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
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
******
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
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