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This guy is alive, and yet has no pulse

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moshquerade said:
i got your fishy right here


icon_wet-trout.gif
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It must be very sophisticated to be able to regulate bloodflow based on mood, activity, temperature, etc

I assumed the device was supposed to help the heart pump blood, not be a continuous motor running.
 
GasX said:
Iirc, there is some evidence from cardiopulmonary bypass surgeries that the body does, in fact, prefer pulsatile blood flow.
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This bypass is still relying on the heart, right? So there would be a pulse. Or is that where the heart is unplugged and a machine circulates the blood until the heart is replaced?
 
Minjin said:
Without blood pressure, the blood will not flow to where it needs to go. The arteries, capillaries, and veins aren't just a bunch of pipes that you can pour water down.
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Please do some research before jumping to your own conclusions. I said no pulse and no measurable blood pressure.
 
This is the one example in which I don't support gov't healthcare--I don't like my taxes paying to keep this fuck alive.

Well, they did for 8 fucking years.
 
Hacp said:
You can't get a gauge in there?
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"Only a few days after his surgery to implant the device, Mr. LeBlanc said he was feeling much better and he hopes for a quick return to his daily routine. He's still adjusting to some of the stranger side effects of his new device, including no pulse. The LVAD keeps blood moving continually with no pulsation, so he no longer has a palpable heart beat or traditionally measurable blood pressure."

http://www.sciencedaily.com/releases/2009/10/091027085306.htm
 
moshquerade said:
"Only a few days after his surgery to implant the device, Mr. LeBlanc said he was feeling much better and he hopes for a quick return to his daily routine. He's still adjusting to some of the stranger side effects of his new device, including no pulse. The LVAD keeps blood moving continually with no pulsation, so he no longer has a palpable heart beat or traditionally measurable blood pressure."

http://www.sciencedaily.com/releases/2009/10/091027085306.htm
Click to expand...

But you can still measure the blood pressure through other means.
 
Damn some of you are absolutly killing the blood pressure and science stuff behind this.

There absolutly is blood pressure in him. There is no way around it. If there is blood flow there is a pressure. No flow no pressure. Flow is dictaed by difference in pressure between two points. Just because the flow is continous instead of pulsatile doesn't mean there is not pressure. Plus blood flow in capillary beds and veins tends to be more continous rather than pulsatile anyway to start off with. Think about it...

Now yes traditionally he has no blood pressure because traditionally pressure is recorded based on the pulsatile nature of blood flow in arteries. Saying that he has no blood pressure is just an artefact of the recording method.

Traditionally blood pressure (bp from now) is measured by squeezing arteries in the arm. Now because the arteries are elastic they can collapse and stop blood flow. It works this way because the bp has a peak and a minimum. Put the cuff pressure on the arm to somewhere between the peak and minimum and there is intermitant flow and you can actualy hear this. Raise cuff pressure nd the sound disappears. the pressure at which the sound stops is systolic pressure when the heart contracts and is the peak. No blood flow here no sound.

From the same mid point you can go down. When the sound disappears again there is blood flow all the time and no interittant sound. That's diastolic pressure, when the heart relaxes, so the minimum point.

Now you can see that if there's no peak and minimum this doesn't work hence the problem with the method. Now from lightly skimming the articles the LVAD only assist about 40% of this so there is still pulsatile flow but to a lesser extent so it probably is harder to pick up.
 
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