Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Perfusion Program Fall 2014 > Ed's Cardiac Output Lecture / Final Exam Prep > Flashcards

Ed's Cardiac Output Lecture / Final Exam Prep Flashcards

1
Q

Cardiac Output

Formula ?

A 
C.O      =  HR           X   SV
ml/min = beats/min X ml/beat
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Cardiac Output (resting range)

A

4 - 8 L/m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

6 Factors affecting Cardiac Output

MOBGAP

A
  • Metabolic rate
  • Oxygen demand
  • Body size / type
  • Gender
  • Age
  • Posture
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The most potent determinate of cardiac output is

A

metabolic oxygen demand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

5 Things that increase metabolism:

A
  • exercise
  • sepsis
  • strong emotion
  • trauma/surgery
  • temperature
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

C.O. of a female Vs. C.O. of a male?

A

female = 10% lower than a male of the same body size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In general, females have ____ skeletal muscle mass than males.

A

Smaller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do we adjust for individual differences??

A
  • Calculate cardiac index!
  • Adjusts C.O. to a
    defined measurement
    Of body tissue
    (BSA)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Cardiac Index formula ?

A

C.O. / BSA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Normal adult C.I. range?

A

2.5 - 4.2 L/min/m2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How do we calculate BSA??

A

(w^.425)(H^.725)(.007184)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Advantages of CI ?

A

Normalizes cardiac output relative to body surface area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Disadvantages of CI ?

A

The relationship of metabolism to surface area can be very different from patient to patient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When is CI at its highest?

A

Childhood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Neonates may have

A

X3 the CI as an adult

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

when a person stands up, what happen?

A

C.O. decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

S.V. formula =

A

C.O. / HR X1000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

DO2 (delivery) formula=

A

CaO2 X C.O. X 10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

PVR formula =

A

80 X (MPAP-PAWP) /C.O.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

SVR formula =

A

80 X (MAP - RAP) / C.O.

21
Q

Stroke volume is a function of:

A

A. Preload (EDP)
B. Afterload (Pa)
C. Contractility

22
Q

Normal S.V. =

A

60 - 100 ml/beat

23
Q

E.F. Formula =

A

S.V. X 100 / EDV

24
Q

Normal E.F. =

A

65%

25
Q

Frank-Starling Law

describes what?

A

relationship between SV and cardiac performance

26
Q

Preload definition = LVEDP
y = Press
X = Volume

A 
the amount of -myocardial fiber 
  stretch &/or
- amount of volume in 
  the ventricle
at the end of diastole
27
Q

Afterload definition =

A

resistance, impedance, pressure the ventricles must overcome

To eject its blood volume

28
Q

Clinically the most sensitive measure of afterload is ?

A

SVR/PVR

29
Q

SVR formula =

A

(MAP-RAP) X 80
_________________
C.O.

30
Q

PVR formula =

A

(MPAP - PAWP) X 80
_________________
C.O.

31
Q

What has an inverse relationship to afterload ?

A

Afterload

32
Q

Inotrophism definition ?

A

inherent property of shortening of the myocardial

muscle fibers, apart from preload

33
Q

What pathologies invalidate that the RV C.O. and LV C.O. are equal ?

A
  • Intra-cardiac shunts

- Reguritant lesions

34
Q

3 Invasive techniques to measure C.O. ?

A

Fick Method
Dye dilution
Thermal dilution

35
Q

2 Non Invasive techniques to measure C.O. ?

A

Doppler

Bioimpedance

36
Q

3 requirements for the Fick Principle?

A
  • Arterial sample
  • Mixed venous sample
  • Spirometer
37
Q

Fick Principle measures what ?

A
  1. total O2 uptake per minute 2. amount into each 100 cc blood
38
Q

The Fick method for cardiac output determination equation ?

A

C.O. (Q) = VO2
____________
CaO2 - CvO2 X 10

39
Q

“Gold standard” for measuring CO is ?

A

Thermodilution

40
Q

What are the two methods of thermodilution that are available:

A

1) bolus thermodilution

2) continuous cardiac output (CCO)

41
Q

Catheter in the pulmonary artery monitors change in temperature of passing blood after a bolus of room temperature saline is deposited into the right atrium.

A

Thermodilution Method

42
Q

In thermodilution process, the injectate port should be in ?

A 
SVC 
or
IVC
or 
RA
43
Q

In thermodilution process, the thermistor to monitor the blood’s temperature is located near the catheter’s distal tip, which should lie in ?

A

PA

44
Q

to calculate the area beneath the curve. This area is

inversely proportional to what ?

A

C.O.

45
Q

Small area under the curve =

A

higher C.O.

46
Q

Large area under the curve =

A

lower C.O.

47
Q

In bolus thermodilution, the CO curve is

displayed on the monitor and validates

A

Correct Injection technique

48
Q

The accuracy of the thermodilution method depends on several assumptions:

A

1) Blood and injectant have mixed adequately.
2) Blood flow is forward. 3) Baseline temperature in the PA is steady.
4) Appropriate technique is used.

Perfusion Program Fall 2014 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions