A. Keeping the radius and length the same, how would doubling the height of the drip bag change the flow rate of fluid? (Be quantitative) B. Keeping the height of the drip bag and length of the cannula the same, how would doubling the radius of the cannula affect the flow rate of fluid? C. Keeping the radius of the cannula and height of drip bag the same, how would doubling the length of the cannula affect the flow rate of the fluid?
A. Keeping the radius and length the same, how would doubling the height of the drip bag
change the flow rate of fluid? (Be quantitative)
B. Keeping the height of the drip bag and length of the cannula the same, how would doubling
the radius of the cannula affect the flow rate of fluid?
C. Keeping the radius of the cannula and height of drip bag the same, how would doubling the
length of the cannula affect the flow rate of the fluid?
D. Hypodermic needles (and the cannulae attached to them) are described by numbers known as
"gauge". Patients commonly receive "18 Gauge", "20 Gauge", and "22 Gauge" cannulae. Larger
gauges correspond to smaller radii. The radius of the tube, for a given gauge, is summarized on
this webpage. Is the outside diameter (OD) or inside diameter (ID) more relevant to calculating
fluid flow? Why?
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