In the auscultation method for blood pressure measurement, what is
systolic pressure indicated by? - ANSWER The first detection of the
sounds.
In the auscultation method for blood pressure measurement, what is
diastolic pressure indicated by? - ANSWER The disappearance of the
sounds.
What is the basis for the sounds referred to as Korotkoff sounds? -
ANSWER Turbulent blood flow
What is a finger pulse transducer, together with a sphygmomanometer,
capable of determining? - ANSWER Only systolic pressure. Systolic
pressure is indicated by the first detection of a finger pulse, whereas
diastolic pressure can only be determined using the auscultation
method.
What would you expect the measured systolic blood pressure to be with
the arm raised above the head? - ANSWER Lower than that measured
with the arm in its normal position.
What would you expect if a sphygmomanometer cuff designed to be
used on a small child's arm was used on an adult's arm? - ANSWER
Measured systolic and diastolic pressures would both be higher than the
true pressures.
The terms systole and diastole usually refer to the _______ and
_______, respectively, of the _______. - ANSWER contraction;
relaxation; ventricles
How is pressure generated? - ANSWER -Contraction (systole) of the
heart's ventricles
, What do we usually refer to when speaking of blood pressure? -
ANSWER Systemic Arterial blood pressure, though all vessels have
pressure
How does blood flow? - ANSWER From higher to lower pressure, so the
contracting vessels generate a slightly higher pressure than the arteries
-pressure falls progressively as it passes through the body
Highest BP/Lowest BP - ANSWER -Left ventricle/right atrium
When is arterial pressure at its highest? - ANSWER -immediately after
the ventricle contracts (systolic)
When is arterial pressure at its lowest? - ANSWER -as the ventricle
relaxes (diastolic), immediate to the next contraction
Pulse Pressure - ANSWER The difference between systolic and diastolic
pressure in the arteries
-gets smaller as vessel size decreases (so in the smallest vessels, there
is only one blood pressure)
Invasive but accurate method of measuring BP? - ANSWER -Inserting a
catheter attached to a pressure gauge in an artery
Units of BP - ANSWER -Pressure can be measured as the height of
liquid it can push up against gravity
-blood and water have similar densities, so we can measure blood
pressure in units such as cm of water, inches of water, or feet of water
-Mercury is 13.5 times heavier than water (or blood) for the same volume
-13th of the height of water filled (more practical)
-mmHg
Direct Measurements of BP - ANSWER -Used in intensive care
-a plastic tube filled with saline connected to the vein
-Central Venous Pressure
-8-15 cmH2O or 6-11 mmHg. We can't do this for arteries because the
apparatus would have to be about two meters tall!
systolic pressure indicated by? - ANSWER The first detection of the
sounds.
In the auscultation method for blood pressure measurement, what is
diastolic pressure indicated by? - ANSWER The disappearance of the
sounds.
What is the basis for the sounds referred to as Korotkoff sounds? -
ANSWER Turbulent blood flow
What is a finger pulse transducer, together with a sphygmomanometer,
capable of determining? - ANSWER Only systolic pressure. Systolic
pressure is indicated by the first detection of a finger pulse, whereas
diastolic pressure can only be determined using the auscultation
method.
What would you expect the measured systolic blood pressure to be with
the arm raised above the head? - ANSWER Lower than that measured
with the arm in its normal position.
What would you expect if a sphygmomanometer cuff designed to be
used on a small child's arm was used on an adult's arm? - ANSWER
Measured systolic and diastolic pressures would both be higher than the
true pressures.
The terms systole and diastole usually refer to the _______ and
_______, respectively, of the _______. - ANSWER contraction;
relaxation; ventricles
How is pressure generated? - ANSWER -Contraction (systole) of the
heart's ventricles
, What do we usually refer to when speaking of blood pressure? -
ANSWER Systemic Arterial blood pressure, though all vessels have
pressure
How does blood flow? - ANSWER From higher to lower pressure, so the
contracting vessels generate a slightly higher pressure than the arteries
-pressure falls progressively as it passes through the body
Highest BP/Lowest BP - ANSWER -Left ventricle/right atrium
When is arterial pressure at its highest? - ANSWER -immediately after
the ventricle contracts (systolic)
When is arterial pressure at its lowest? - ANSWER -as the ventricle
relaxes (diastolic), immediate to the next contraction
Pulse Pressure - ANSWER The difference between systolic and diastolic
pressure in the arteries
-gets smaller as vessel size decreases (so in the smallest vessels, there
is only one blood pressure)
Invasive but accurate method of measuring BP? - ANSWER -Inserting a
catheter attached to a pressure gauge in an artery
Units of BP - ANSWER -Pressure can be measured as the height of
liquid it can push up against gravity
-blood and water have similar densities, so we can measure blood
pressure in units such as cm of water, inches of water, or feet of water
-Mercury is 13.5 times heavier than water (or blood) for the same volume
-13th of the height of water filled (more practical)
-mmHg
Direct Measurements of BP - ANSWER -Used in intensive care
-a plastic tube filled with saline connected to the vein
-Central Venous Pressure
-8-15 cmH2O or 6-11 mmHg. We can't do this for arteries because the
apparatus would have to be about two meters tall!
