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RCIS > Formulars and ideas > Flashcards

Formulars and ideas Flashcards

fornulas and stuff

1
Q 
Calculate the RF% ( regurgitate fraction ) 
              Given
 LVMF is 6.6 Liters / min.
TD ( Thermodilution ) CO is 
        4.56 Liters / min.
A

LVMF - CO from Fick or TD
Divided by LVMF

Step 1: 6.6 Lt - 4.56 Lt = 2.04 Lts
Step 2: 2.04/6.6 = .309
Step 3: .309 x 100 = 30.9%

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2
Q

Cardiac Index

Formula for CI is …

A

CI = CO / BSA
Cardiac output divided by the Body
Surface Area

Normal values = 2.5 - 4.0 l/min/meter
squared

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3
Q

What is BSA or Body Surface Area

A

BSA = the total suface area of the human body. The BSA is used in many measurments in medicine, including the calculation of drug dosages and the amount of fluids to be administered IV.

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4
Q

Angiographic Cardiac output or
LVMF ( left Ventricular minute flow)
What is the formula for LVMF?

A

LVMF
LV End Diastolic volume - LV End Systolic Volume x Heart Rate
LVEDV - LVEST x HR

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5
Q

Calculate the LVMF or Angiographic Cardiac output

       Given:   LVEDV = 140 ml
LVESV = 40ml    HR = 66 bpm
A

LVMF = LVEDV - LVESV x HR

Step1 : 140 ml - 40 ml = 100 ml
Step2: 100 ml x 66 bpm = 6600ml
answer : LVMF = 6600 mi / min
6.6 Liters / min

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6
Q

RF ( Regurgitation Fraction) Definition

A

The ratio of Regurg to the LV total flow. This is the most accurate form of cardiac output for patients with valvular regurg.

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7
Q

Calculate the Angiographic SV
Given:
* EDV = 140 ml
* ESV = 40 ml

A

Formula:
EDV - ESV
140 ml - 40 ml = 100 ml

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8
Q

What is the average SV in Adults?

A

70ml

range is 60 - 130 ml

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9
Q

Given:
CO 5 liters / min
Heart rate 80
Calculate the SV

A 
Formula:
        SV = CO in ml/hr
  Step1 : change 5 liters to ml = 5000ml
  Step2 : Divide by heart rate of 80
    5000 / 80 = 62.5 or 63 ml/min.
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10
Q

Stroke Volume SV =

A

SV = CO in ml’s
Divided by HR

Normal Range = 60 - 130 ml

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11
Q

What is the Formula for MAP ( Mean Arterial Pressure)

A

Systolic BP = ( 2 x Diastolic ) divided by 3.

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12
Q

The patient has a BP of 140 / 90

Calculate the MAP

A

STEP1 : 140 + 2 x 90 = 320
Step2 : 320 / 3 = 106.6
answer : 107 mm/hg

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13
Q

PVR
( Pulmonary Vascular Resistance)
Formula

A

(MEAN PA) - (Mean PCW)
divided by CO

           Given:
PA = 25/10/15
PCW = 9/6/6
 CO = 6.8

(15-5)/6 = 1.3 HRU’s
(Hybrid or Wood Units)

1.3 x 80 = 104 dynes/sec/cm - 5 ARU’s

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14
Q

Pulse Pressure Formula

A

AO systolic - AO Diastolic

Given: BP = 120/80
120 - 80 = 40
40 mmHg

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15
Q

Calculate the Ejection Fraction
Given:
EDV 130
ESV 70

A

Formula:
SV (Stoke Volume)/ EDV

130 - 70/130 = .46
.46 or 46%

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16
Q

The dP/dT comes from detla P/delta T or change in pressure over time and is a good index of?

A

LV Contractility

17
Q

What is the Average BSA for men and women?

A

Average BSA for adult men : 1.9 m2

18
Q

Angiographic SV (STROKE VOLUME) Definition

A

The average blood being ejected from the LV during each Contraction. The Angiographic SV can be calucatedusing the formula:
SV = EDV - ESV
Average adult stroke volume is 70ml.

19
Q

Normal O2 Consumption

A

Adult 250 ml/min

Child 150ml/min

20
Q

Formula for ejection Fraction

A

Stroke Volume

divided by End Diastolic volume.

21
Q

Ejectio Fraction Formula

A

Formula:

SV / EDV

22
Q

Formula for Conversion of HRU’s
(Hybrid Resistance Units) to ARU’s
Adsolute Resistance Units

A 
SVR = HRU's x 80
PVR = HRU's x 80
23
Q

The formula for BP

A

CO x SVR

systemic vascular resistance

24
Q 
Normal Range for Adsolute
Resistance Units (ARU's) for SVR and PVR.
A 
SVR = 1130 + or - 178
PVR = 67 + or - 23
25
Q

Given:
HR 90
SV 100 ml
Calculate the CO ( cardiac output)

A

CO = HR + SV
90 x 100 = 9000
CO = 9000 ml/min or 9 L/min

26
Q

Formula for Angiographic SV ( Stroke Volume )

A

End diastolic volume minus the end systolic volume

EDV - ESV

27
Q

CO (Cardiac Output) = ____ X_____

A

HR x SV

Normal is 4-8 liters per minute.

28
Q

Formula for RF% ( regurg Fraction) using Cardiac Output.

A

Formula for Regurgitation Fraction
LVMF - CO from Fick or TD
divided by LVMF

29
Q

Formula for Peak to Peak Gradiient?

A

LV systolic - AO systolic

Given:
LV 180 /0/18
AO 130 /70

180 - 130 = 50
Answer 50 mmHg gradiant

30
Q

Normal Range for Absolute Resistance units (ARU’s) for SVR and PVR

A 
SVR = 1130+ or -178
PVR = 67+ or -23

RCIS (5 decks)

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