How Much Force Must a Nurse Apply to Overcome Blood Pressure Using a Syringe?

[talaroue]

Homework Statement

A 1.63 mL syringe has an inner diameter of 5.04 mm, a needle inner diameter 0.21 mm, and a plunger pad diameter (where you place your finger) of 1.06 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. What is the minimum force the nurse needs to apply to the syringe?

Homework Equations

F1/A1=F2/A2

The Attempt at a Solution

I understand that the pressure is constant through out the syringe, but what I don't know how the blood pressure is used. I see that i can use blood pressure=force/(area of needle inner diameter) solve for force. then use the relationship F/A to solve for the tap.

So long story short...does it matter what the blood pressure number is or do i have to change it to Pa/atm some how?

 

[talaroue]

im so confused about the blood pressure thing. FML

 

[talaroue]

Blood pressure is unit force per area, so is that just mean I am left with F1/A1=Blood pressure

 

[LowlyPion]

What is the pressure needed to get the goodies to enter the blood stream?

Blood pressure is measured in mmHg if that is the clue you need.

 

[talaroue]

oh that's i couldn't find, let me work knowing that and see if I can figure it out.