Normal Values + formulas

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Author:
mvblanc
ID:
74706
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Normal Values + formulas
Updated:
2011-04-07 10:02:04
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Respiratory Exam review
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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
    Bradycardia
    Tachycardia
    HR = 60-100 bpm

    Brady = < 60 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)
  24. A-aDO2
    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
    • A-aDo2 x 0.003
    • A-aDo2 x 0.003+C(a-v)O2
  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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