Blood Pressure

Question 1

What are the different units of pressure?

Answer 1

• milligrams of mercury (mmHg)
• pound per square inch (psi)
• pascal (Pa)

Question 2

Blood pressure is measured in?

Answer 2

mmHg (above the surrounding air pressure)

Question 3

Central venous pressure measured in?

Answer 3

cmH2O

Question 4

Blood pressure is expressed in terms of?

Answer 4

• systolic - pressure your blood exerts against your artery walls when the heart beats
• diastolic - pressure in the arteries when the heart is at rest

Question 5

Blood cannot be?

Answer 5

Compressed

Question 6

Where is blood pressure usually measured from and using what?

Answer 6

The brachial artery, using a sphygmomanometer

Question 7

What is the first korotkoff sound a measure of?

Answer 7

Systolic blood pressure - blood flow is turbulent as it starts to flow through the restricted area again and makes a pounding sound

Question 8

What is the last sound a measure of?

Answer 8

Diastolic blood pressure - laminar flow has returned therefore no sound

Question 9

What is the normal blood pressure range?

Answer 9

• systolic ( 90-140 mmHg )

- diastolic ( 70-90 mmHg )

Question 10

What is hypertension?

Answer 10

High blood pressure

Question 11

What is hypotension?

Answer 11

Low blood pressure

Question 12

What affects changes in blood pressure?

Answer 12

• blood vessel diameter
• cardiac output (blood flow)
• viscosity of blood

Question 13

Properties of liquids under pressure are important for body function?

Answer 13

• movement of blood and lymph
• fluid movement across membranes
• bladder function

Question 14

What is pascals principle?

Answer 14

Any change in pressure in an enclosed fluid is transmitted equally to every part of the fluid

Question 15

Pressure is dependant on?

Answer 15

• the depth of the liquid and the density of the liquid