Posted by Jacob Dover on Friday, January 18, 2013 at 2:01am.
An intravenous blood plasma drip enters a vein in the patient’s arm from a bag raised a height h above the
vein. If the diameter of the 5 cm long needle is 0.5 mm, use Poiseuille's law to find the height h that
results in a 5 cm3/min flow rate.
(Assume the blood pressure in the arm is 18 torr = 2392 Pa and the viscosity of the blood plasma is
a. 0.17 m
b. 1.55 m
c. 6.46 m
d. 0.52 m
e. 0.66 m
Notes: I tried to solve the problem on my own, but kept coming up with 2.46 m. If someone could just show me how to set it up correctly, that would help greatly.
- Physics - Elena, Friday, January 18, 2013 at 8:31am
Q=5 cm³/min = 5•10⁻⁶/60 m³/s
d=0.5 mm => r=0.25•10⁻³ m,
L =0.05 m
P = 8• Q•η• L/ π•r⁴=
h=(P+2392)/ ρg=(4074+2392)/1.025•10³•9.8=0.64 m.
If p₀=18 torr ~ 2400 Pa, then
ans. - e
Answer This Question
More Related Questions
- physics - A patient is to be given a blood transfusion. The blood is to flow ...
- PHYSICS ---HELP! - A patient is to be given a blood transfusion. The blood is to...
- Physics - 1) A small dense object is suspended from the rear view mirror in a ...
- Physics - A bag of blood with a density of 1050 kg/m3 is raised 1.37 m higher ...
- Bio 20 - When blood enters a vein from a venule, the blood pressure A) remains ...
- Physics - A collapsible plastic bag contains a glucose solution. If the average ...
- bio - is about blood flow. if i start in the superior mesenteric vein vein to ...
- physics - If the average gauge pressure in the vein is 14400 Pa, what must be ...
- physics - The drawing shows an intravenous feeding. With the distance shown, ...
- physics 1 - The drawing shows an intravenous feeding. With the distance shown, ...