consider example 13.18. suppose in a second case, 1.20 l of saline solution, with a density of 1020 kg/m3 and a viscosity of 1.10 x 10-3 pa.s, is to be infused into a patient in 10.5 hr. the catheter is 35.0 mm long and has an inner diameter of 0.320 mm. the gauge pressure in the the patient's vein is 12 mm hg. what is the gauge pressure in the patient's arm in pa?