# Normal Values + formulas

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1. What is the formula for duration of flow?
• tank psi x tank factor
• LPM
2. What is the Factor for an
E tank
H tank
• E tank = 0.28
• H tank = 3.14
3. Formula for Airway Resistance (Raw)
Peak pressure - Plateau pressure
4. Static Compliance
• Exhaled Volume
• Plateau - PEEP
5. Air Entrainment Ratio / Factor
FIO2
24 - 28 - 32- 35 - 36 - 40- 60- 70- 100
• 24 = 25:1 = 26
• 28 = 10:1 = 11
• 32 = 6:1 = 7
• 35 = 4.6:1 = 5.6
• 36 = 3:1 = 4
• 40 = 1:1 = 2
• 60 = 0.6:1 = 1.6
• 100 = 0:1 = 1
6. LABORATORY TESTING

Normal Value for CBC
RBC
Hb
Hct
WBC
• RBC =4-6 mill/cu
• Hb = 12-16 gm/100ml
• Hct = 40-50%
• WBC = 5,000-10000/cu
7. Normal Value for Electrolytes

Na+
K+
CL-
• Na+
• 135-145 mEq/L

• K+
• 3.5-4.5 mEq/L

• CL-
• 80-100 mEq/L
8. EKG Values

HR
Tachycardia
HR = 60-100 bpm

Tachy = > 100 bpm
9. Infant normal ranges

Pulse
RR
BP
Birth weight
Apgar score
• Pulse
• 110-160 bpm
• RR
• 30-60 breaths/min
• BP
• 60/40 mmHg
• Birth weight
• >3000 gm
• Apgar score = done at 1min and 5 min
• 7-10 = normal
• 4-6 = poor
• 0-3 = Emergency
10. Normal ranges for arterial Blood gas Calculations

vd/vt
CaO2
CvO2
C(a-v)O2
Qs/Qt
• vd/vt =20-40% / 40-60% on vented pts
• CaO2 =17-20 vol%
• CvO2 =12-16 vol%
• C(a-v)O2 =4-5 vol%
• Qs/Qt=5 is normal /10-20 % tolerable
• 20-30 % life threatning
11. Blood Gas Parameters
PaCO2
PO2
pH
SaO2
HCO3-
• PaCO2 = 35-45 mmHg
• PO2 = 80-100 mmHg
• pH = 7.35-7.45
• SaO2 = 95-100%
• HCO3- = 22-16 mEq/L
12. HEMODYNAMIC

BLOOD PRESSURE
BLOOD PRESSURE = 120/80 mmHg
13. Mean Arterial Pressure (MAP)
MAP 93-96 mmHg
14. CVP - Central Venous Pressure
CVP = 2-6 mmHg (4-12 cmH2O)
15. PAP Pulmonary arterial pressure
PAP 25/8 mmHg ( mean 14)
16. PCWP - Pulmonary wedge pressure
PCWP = 4-12 mmHg
17. CO- Cardia Output
CO = 4-8 L/min
18. CI- Cardiac index
CI = 2.5-4.0 L/min
19. VO2- ejection fraction
VO2 = 250 ml/min
20. SVR - systemic vascular resistance
SVR = 20 mmHg/L/min or 1600 dynes/sec/cm5-
21. PVR - Pulmonary Vascular resistance
• PVR = 2.5 mmHg /L/min
• or
• 200 dynes/ sec/ cm5-
22. PULMONARY VASCULAR RESISTANCE
PVR = (MPAP-PWP)/CO
23. PAO2 =
• PAO2 =
• (Pb -PH2O)FIO2 - (PaCO2 x1.25)
PAO2- PaO2
25. CaO2
CaO2 =O2 in Rbc (Hb x 1.34xSaO2) + O2 in plasma( PaO2 x 0.003)
26. MAP
• MAP
• (2xdiatolic) + systolic / 3
27. Fick equation ( CArdiac Output)/ Qt
QT = VO2/ C(a-v)O2 x10

QT = HR x SV(stroke volume)
28. Cardia Index
CI QT(cardiac output) / BSA Body surface area
29. Pulse pressure
Systolic - Diatolic pressures
30. Stroke Volume
CO / Heart rate
31. EJECTION FRACTION
SV / End diastolic volume
32. SVR- Systemic vascular resistance
(MAP-CVP) / CO
33. CvO2
CvO2 =O2 in Rbc (Hb x 1.34xSvO2) + O2 in plasma( PvO2 x 0.003)
34. C(a-v)O2
CaO2- CvO2
35. Desired FIO2
FIO2 present x Desired FIO2 / current PaO2
36. Desired Vt
Desired VE
Desired RR
• Desired Vt= (actual Vt x PaCo2)=desired Vt PaCO2)
• Desired RR = (actual RR x PaCO2) = (Desired RR x PaCO2)
• Desired VE (actual VE x PaCO2) = ((desired VE x PaCO2)
37. VD/VT
PaCO2-PECO2 / PaCO2 x 100
38. SaO2
SaO2= PaO2 + 30
39. Qs/Qt
40. Amount of drug in milligram (mg)
Drug % x 10 ml = # of mg of drug
41. Pediatric drug dosage
(clark's rule)
Clark' srule ESD = wt x normal adult dosage / 150
42. Alveolar ventilation
• (Vt - VD) xF
• use the approximaye 1ml / lb of IBW for VD
43. Dynamic compliance
• Exhaled Volume
• PIP - PEEP

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 Author: mvblanc ID: 74706 Filename: Normal Values + formulas Updated: 2011-04-07 14:02:04 Tags: Respiratory Exam review Folders: Description: Normal Values- Formulas Show Answers:

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