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Brian's Practice Course > Typical Values > Flashcards

Typical Values Flashcards

1
Q

What is a typical VC?

A

4.8L

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2
Q

What is a typical Vt?

A

0.5L

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3
Q

What is a typical IRV?

A

3.1L

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4
Q

What is a typical ERV?

A

1.2L

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5
Q

What is a typical IC?

A

3.6L

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6
Q

What is a typical FRC?

A

2.4L

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7
Q

What is a typical RV?

A

1.2L

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8
Q

What is a typical TLC?

A

6.0L

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9
Q

Typical airway resistance?

A

1.2 cm H2O/L/sec

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10
Q

Typical airway conductance? (G-aw)

A

0.4-1.6

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11
Q

Esophageal balloon placement from nose to tip of the balloon in cm?

A

50 cm

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12
Q

What is the amount of air added to the balloon of an esophageal balloon?

A

0.5 ml

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13
Q

Unimportant: Just take a look at them. Don’t worry if you miss these

What is normal…

Static lung compliance?

Coefficient of retraction?

Maximum static recoil pressure?

A

Static lung compliance 0.2

Coefficient of retraction 4-8

Maximum static recoil pressure 25-35

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14
Q

Typical MIP?

A

-60 cm H2O

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15
Q

Typical MEP?

A

80-100

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16
Q

Typical DLCO?

A

25 mLCO/min/mmHg STPD

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17
Q

What is the CO concentration % for the DLCO-SS? is it invasive? Why?

A

0.1%-0.2%.

The test is invasive because it requires an ABG.

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18
Q

A-a Gradient:

What is normal?

What range is considered VQ mismatch?

Above what is considered a shunt?

A

Normal is up to 100

Above 100 is a VQ mismatch

Above 300 is a shunt

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19
Q

What is a normal CaO2? (Arterial oxygen content)

A

17-20%

20
Q

What is a normal CvO2? (Mixed venous oxygen content)

A

14%

“Low teens”. Range is below 15.

21
Q

What is a normal C(a - v)O2? (Arterial-venous oxygen content difference)

A

4-5%

22
Q

What is normal Qt? (Cardiac output)

A

4-8 L/min

23
Q

What is normal Qs/Qt? (Shunt equation)

How can you estimate it?

A

3-5%

*page D-19

To simplify:

Start with 5%. Increase by another 5% for every 100 torr of (A-a) gradient.

For example, start with 5%. If a patient has an A-a of 200, that’s 10%. Add both and the total shunt is 15%.

24
Q

What is normal Hb (hemoglobin) and Hct (hematocrit)?

A

Normal Hb is 12-16%

Normal Hct is 3 times the given Hb.

25
Q

What is normal Vd/Vt? (Deadspace to tidal volume ratio)

A

20-40%

26
Q

40 50 60 Rule:

What is the usual difference between PaO2 and SaO2?

A

The difference between PaO2 and SaO2 is 30.

A PaO2 of 40 will have an SaO2 of 70%
A PaO2 of 50 will have an SaO2 of 80%
A PaO2 of 60 will have an SaO2 of 90%

27
Q

What is normal PCO2 range?

What is normal PO2 range?

What is normal pH range?

A

Normal PCO2 range is 35-45

Normal PO2 range is 80-100

Normal pH is 7.35 - 7.45

28
Q

If a PaO2 is > 140, what does this indicate?

A

The patient is on supplemental oxygen.

Bonus: it could also be due to a bubble in the sample or a technical error.

29
Q

What is a normal P50? (not important)

If the value is greater than normal this is a (right/left) shift?

A

27

Greater than 27 is a right shift. Lower than 27 is a left shift.

30
Q

What is a normal COHb?

What is a normal COHb for a smoker?

A

Normal COHb is 0-2%

Normal COHb for a smoker is 5-10%

31
Q

What is normal PaCO2?

Normal PETCO2?

Normal PETCO2 expressed as a percent?

A

What is normal PaCO2? 40

Normal PETCO2? 30

Normal PETCO2 expressed as a percent? 3-5%

32
Q

What is a normal MET? (metabolic equivalent)

A

1 MET = 3.5 ml O2/min/kg

33
Q

How many minutes will workload increase using the “Bruce Protocol”?

A

3 minutes

34
Q

What is the normal Borg scale? from 1 to ___

What is the modified Borg scale? from 1 to ___

A

Normal Borg scale is 1-20

Modified Borg scale is 1-10

35
Q

On a rhythm strip, QRS complexes between ___ and ___ large boxes indicate a normal heart rate (60-100)

A

3-5 large boxes indicate a normal heart rate, between 60-00 bpm.

36
Q

What is normal Ve?

How can you calculate maximum Ve using an FEV1?

A

5-10 L/min

FEV1 x 35 is considered a patient’s maximum Ve for stress testing.

37
Q

What is normal oxygen consumption (VO2)?

A

250ml - 4000ml

Note: VO2 is the best indicator of workload performed. For example, a patient with poor fitness is going to have a higher VO2 than a fit patient with the same level of work performed.

38
Q

What is normal CO2 production (VCO2)?

A

200ml - 4000ml

Notice it starts a little lower than VO2, but can equal VO2 when workload are high.

39
Q

What is a normal respiratory exchange ratio (RER)?

A

0.8 at rest

This value can increase to 1 (you’d stop testing if you hit 1) as workload increases.

To find RER…

VCO2
_____
VO2

40
Q

What is a normal ventilatory equivalent for oxygen (Ve/VO2)?

A

20-30 at rest. The value will increase as workload increases.

Ve
___
VO2

41
Q

What is a normal ventilatory equivalent for CO2 (Ve/VCO2)?

A

25-35

Just a little higher than ventilatory equivalent for oxygen (Ve/VO2)

42
Q

What is O2 pulse and what is its normal value?

A

O2 pulse is the amount of O2 consumed per heartbeat.

Normal is 2.5 - 4.0 ml per hearbeat at rest

A low O2 pulse that does not increase with increasing heart rate indicates cardiac disease.

IMPORTANT: If a patient’s heart rate increases but O2 consumption cannot increase, O2 pulse will fall.

43
Q

During exercise testing, what is a normal A-a gradient at rest?

A

10-20 on room air. Less than 100 is normal on 100% fio2.

44
Q

Cardiac Index is typically ___ of cardiac output

A

Half.

45
Q

What is normal systemic vascular resistance (SVR) in dynes?

A

1600

Brian's Practice Course (32 decks)

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