Recent content by wolf!

so the reason for the higher bag draining first is not known at preset? all that is known is that it happens?

yes, I understand that, what it does. my question is why. Why does The piggyback bag produce a slighty higher pressure at the connection point due to its slighty higher elevation.

r the sake of answering the question, we'll assume both have identical variables, except one is higher than the other, and absolutely nothing else is different. I'm beginning to think the answer has not yet been found, and it is considered an accepted truth, without logic, because this thread...

I'm beginning to think the further the distance to fall creates increased velocity, which increases pressure?

I tried that online calculator, and it is indead cool, and does show an output of higher pressure. from the get go I knew the outcome was higher pressure. What I'm trying to find out is the logic why?

OK, I understand that: the top bag yields the highest pressure in the line the bottom bag yields the medium pressure in the line the vein has the lowest pressure in the line. the highest pressure will dominate the flow to the lowest pressure. the high pressure will not backflow into the...

pic of setup. http://3.bp.blogspot.com/-1-s8FBqGOR4/TnunSmhB5XI/AAAAAAAAArA/nzbXjsZTDoE/s1600/piggy2.jpg

example, see iv medications on this sample page: http://books.google.com/books?id=odY9mXicPlYC&pg=PA858&lpg=PA858&dq=i+v+piggyback+gravity&source=bl&ots=z02Cb8RYuT&sig=tOJvP5_dB7FHb6RN6ScC8mknGag&hl=en&sa=X&ei=pLoeUNI7h8XqAdbtgYgL&ved=0CFgQ6AEwBzgK#v=onepage&q=i%20v%20piggyback%20gravity&f=false

The smaller bag tends to empty before the bigger bag even starts, to any mesurable degree. it happens when the fluid is identical. fully unclamped the small bag will empty in minutes then the larger bag starts to empty, at pretty much the same rate.the height of the fluid in the bottom bag is...

I'm sorry, I meant the piggyback is higher than the main bag. so is the pressure head a gravity thing?

BTW there is no pump. the flow rate is regulated by a thumb wheel device that squeezes on the tube, after they join. the smaller bag usually has a connector that is a smaller gauge than the tube at the connection. the connection is off the main line and is not in it's line of flow.

In my thinking, the pressure head, in the pressure of the fluid at the patients arm. this is dependent on height. the higher the fluid, the more pressure? the more pressure the faster the movement of fluid? so the higher bag should empty faster until the fluids surface is the same as the lower...

Hi, my log in is a carry over from motorcycle stuff. What is pressur head, and why does it make the lower bag empty first? thanks

Hi, I'm a nurse, so my physics background is about that of a lay person. Please explain on that level. Ordinarily an Intravenous (IV) fluid bag is one liter. An IV piggyback is usually 100ml. usually the fluid in each is the same 0.45% NaCl. The piggyback may also get medication mixed in with...