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Old 03-03-2014, 04:15 PM   #41
217Bimmer
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med device companies i know of in minn
read
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I always have to laugh when I see a thread described as "Not Work Safe." Is there anything on the OT forum that's really "work safe"? If I were your boss, I'd be mad if you spent any time on this forum at work at all. How is a picture of a naked girl any less work safe than, say, a picture of a matador getting gored in the *** by an angry bull? - VaderDave
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Old 03-03-2014, 04:23 PM   #42
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read
Fair enough.
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Old 03-03-2014, 04:35 PM   #43
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do you use a multiphysics program such as COMSOL or are you strictly using CFD? Is it possible to model a non-rigid membrane such as tissue with fluid flowing through it? How important are factors such as resonant frequency in your designs or am I just talking out of my as$ at this point?

OH, how about 3d printing? Is your company using this technology?
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Old 03-03-2014, 04:48 PM   #44
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do you use a multiphysics program such as COMSOL or are you strictly using CFD? Is it possible to model a non-rigid membrane such as tissue with fluid flowing through it? How important are factors such as resonant frequency in your designs or am I just talking out of my as$ at this point?

OH, how about 3d printing? Is your company using this technology?
We don't use COMSOL or any other multiphysics software. I personally either use Solidworks flow simulation (for easier and more routine work) and Fluent or Ansys for more complicated and higher resolution jobs. Reason for this is because I can run Solidworks flow on my personal computer and I have to send jobs to a computing center for the other jobs so the turn around times go up to do that. For FEA work I use Ansys but don't do that all that often.

Non rigid surfaces for intercardiac flow are incredibly difficult to model so we don't even bother. We have a set up in one of our labs that has a closed loop fluid path that simulates the pulse of a heart beat to model the effects of the flow on the tissue or tissue on the flow. The whole set up is complete with strobe lights, high speed cameras, thermocouples, pressure sensors, etc so that everything can be captured with one real life test.

Resonance frequencies are not relevant in the work I do because the heart has a pulsed flow and not a constant flow. Also, the devices we make aren't affected by resonance anyway.

I definitely use 3D printing whenever possible and have access to every kind of printer (SLA, FDM, etc) other than the metal sintering (DLMS) printers which are still far too expensive to get. The only downside to 3D printing in my line of work is that it is very difficult to print a very small component with decent resolution with a 3D printer. The stuff I work with is in the less than 0.100" range so a 0.100" part would be considered very large and we have certain components with tolerance requirements of +0.00"/-0.0005" for example. That's just not something a modern 3D printer can do.
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Old 03-03-2014, 05:15 PM   #45
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We don't use COMSOL or any other multiphysics software. I personally either use Solidworks flow simulation (for easier and more routine work) and Fluent or Ansys for more complicated and higher resolution jobs. Reason for this is because I can run Solidworks flow on my personal computer and I have to send jobs to a computing center for the other jobs so the turn around times go up to do that. For FEA work I use Ansys but don't do that all that often.

Non rigid surfaces for intercardiac flow are incredibly difficult to model so we don't even bother. We have a set up in one of our labs that has a closed loop fluid path that simulates the pulse of a heart beat to model the effects of the flow on the tissue or tissue on the flow. The whole set up is complete with strobe lights, high speed cameras, thermocouples, pressure sensors, etc so that everything can be captured with one real life test.

Resonance frequencies are not relevant in the work I do because the heart has a pulsed flow and not a constant flow. Also, the devices we make aren't affected by resonance anyway.

I definitely use 3D printing whenever possible and have access to every kind of printer (SLA, FDM, etc) other than the metal sintering (DLMS) printers which are still far too expensive to get. The only downside to 3D printing in my line of work is that it is very difficult to print a very small component with decent resolution with a 3D printer. The stuff I work with is in the less than 0.100" range so a 0.100" part would be considered very large and we have certain components with tolerance requirements of +0.00"/-0.0005" for example. That's just not something a modern 3D printer can do.
ever work with Microlution machines? http://www.microlution-inc.com/index.php friends of mine from undergrad started the company. 1 micron accuracy.
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I always have to laugh when I see a thread described as "Not Work Safe." Is there anything on the OT forum that's really "work safe"? If I were your boss, I'd be mad if you spent any time on this forum at work at all. How is a picture of a naked girl any less work safe than, say, a picture of a matador getting gored in the *** by an angry bull? - VaderDave
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Old 03-03-2014, 05:28 PM   #46
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^ Nope, never heard of them. Are they a machine shop or do they sell the tools?
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Old 03-03-2014, 05:31 PM   #47
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they design and build micro manufacturing machinery like 3 and 5 axis mills and laser workstations
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I always have to laugh when I see a thread described as "Not Work Safe." Is there anything on the OT forum that's really "work safe"? If I were your boss, I'd be mad if you spent any time on this forum at work at all. How is a picture of a naked girl any less work safe than, say, a picture of a matador getting gored in the *** by an angry bull? - VaderDave
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Old 03-03-2014, 05:35 PM   #48
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Ah I see, yeah we typically will outsource the production of those parts so probably wouldn't have those machines on hand. It doesn't make a whole lot of sense for us to produce really any component on a large scale over buying them after factoring all the time it takes to validate and implement a new manufactured component due to the regulatory red tape.
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Old 03-03-2014, 06:27 PM   #49
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My usual billing rate is approximately $300/hr (I cost more than 914kid's whore), I predict about 100-200 hours to design an effective intake for your car. Still in? Send paypal info.
where am I sending my paypal info to?
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Old 03-03-2014, 06:28 PM   #50
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Tissue valves last the longest and are most durable. It's usually not a pig heart valve anymore though and are actually made from either bovine or swine intestinal wall (just like sausage casing). The old days of removing a valve from a pig or cow are either gone or going away and more synthetically created valves are coming to market. Mechanical valves used to use plastic and biocompatible metals but they required open heart surgery to implant and actually made ticking noises as they worked.

The newer tissue valves can be delivered through your leg, up the femoral artery, and into your heart all through a small 3-5in incision in your leg.



Of the biggest med device companies in MN you come up with those two? Medpace doesn't make medical devices, they just run clinical trials. To be honest, I hadn't even heard of Atrium Medical until just now.
That is so amazing!

I worked for St.Jude. Never did any heart valve stuff, was focused in the cardiac rhythm department where they design and build pacemakers and implantable defibrillators. Compared to the heart valve stuff, it actually seems a lot more simple. But there is still a lot of design and testing that goes into those devices.

Can't believe they can replace a heart valve through the leg, that's insane!
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Old 03-03-2014, 06:46 PM   #51
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Old 03-03-2014, 06:53 PM   #52
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Gotcha.

I am working out of three different buildings right now, but my main office is at the 7000 central building.


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Nope but I know exactly where you are and work just west of you. Are you at the mother ship in Fridley?
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Old 03-03-2014, 08:02 PM   #53
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where am I sending my paypal info to?
Not gonna lie, I'm just going to outsource this to China.

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That is so amazing!

I worked for St.Jude. Never did any heart valve stuff, was focused in the cardiac rhythm department where they design and build pacemakers and implantable defibrillators. Compared to the heart valve stuff, it actually seems a lot more simple. But there is still a lot of design and testing that goes into those devices.

Can't believe they can replace a heart valve through the leg, that's insane!
Nice! Did you work at the Sunnyvale facility or Sylmar? I technically work in electrophysiology devices but work across the board to whatever project needs some help. My major role is intercardiac tissue cooling during RF ablation.

If you think transcatheter valve replacement is cool, you should look into electrophysiology where they can effectively rewire the cardiac conduction system through your leg.

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Gotcha.

I am working out of three different buildings right now, but my main office is at the 7000 central building.
Cool man, what do you do there?

We should get a beer sometime.
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Old 03-03-2014, 08:42 PM   #54
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So, with your education and experience, I would guess that companies are clamoring for you.
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Old 03-03-2014, 09:03 PM   #55
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As an engineer, have you ever been tasked with communicating with females or upper managers?
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Old 03-03-2014, 09:25 PM   #56
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So, with your education and experience, I would guess that companies are clamoring for you.
If his position is anything similar to mine as he stated, I'm going out on a limb for him and say yes. Both head hunters and companies are actively seeking candidates who are project managers/product developers. There seems to be a short supply of qualified folks currently in the industry.
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Old 03-03-2014, 10:08 PM   #57
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Old 03-03-2014, 10:11 PM   #58
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Old 03-03-2014, 10:13 PM   #59
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Thought there might be a medical grade kind
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Old 03-03-2014, 11:01 PM   #60
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How has learning calculus helped you do your job ? Do you use Wolfram ? Which classes from school have helped you the most in your career? Srs, do you use linux at work ?
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