Question

Saline solution is delivered into the vein of a patient through a needle. The saline solution has a viscosity of 0.00037 Pa.s, a density of 1,060 kg/m3, and is delivered through a 7.0-cm long needle with an internal diameter of 0.24 mm directly into the patient’s vein in which the blood pressure is 130 mmHg (1 mmHg=133.4 Pa). The saline solution must be delivered at a flow rate of 0.04×10-6 m3/s. How high must the saline solution be suspended in order to achieve this flow rate? Assume acceleration due to gravity is 9.81 m/s2.

Answer #1

Topic: Fluid mechanics
One patient receives saline solution injected into a vein
through a needle 4 cm long and 0,2 mm radius. The saline solution
has a density and viscosity approximately equal to the water at
ambient temperature and exits from a tank located 1m above the
needle
a)Find the saline solution pressure at the needle inlet
b)Knowing that the blood pressure in the vein is about 2000 Pa
above atmospheric pressure, calculate the time it takes to exhaust
the...

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A 3 cm long needle is used to inject a 0.3 L of a solution
located 70 cm above a patient over a time of 25 minutes. Assume
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a) If the vein`s pressure is assumed to be at atmospheric
pressure, what will be the difference in the input and output
pressures across the needle in mmHg?
b) What is the flow rate of the solution in...

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