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Topics of Respiratory Care > Normal and critical values for intubation/ Weaning Parameters/ calculations > Flashcards

Normal and critical values for intubation/ Weaning Parameters/ calculations Flashcards

1
Q

Normal pH

A

7.35-7.45

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2
Q

Critical pH for intubation

A

<7.25

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3
Q

Normal PaCO2

A

35-45

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4
Q

Critical PaCO2 for intubation

A

> 55 and rising

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5
Q

Normal ratio of dead space to tidal (VD/VT) range

A

0.3-0.4

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6
Q

critical ratio of dead space to tidal (VD/VT) for intubation

A

> 0.6

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7
Q

Normal PaO2

A

80-100 mm Hg

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8
Q

Critical PaO2 for intubation

A

<70 (on O2 >0.6)

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9
Q

Normal P(A-a)O2

A

5-20

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10
Q

critcial P(A-a)O2 for intubation

A

> 450 (on O2)

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11
Q

normal PaO2/PAO2

A

0.75

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12
Q

critical PaO2/PAO2 for intubation

A

<0.15

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13
Q

normal PaO2/FiO2

A

475

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14
Q

critical PaO2/FiO2 (P/F ratio) for intubation

A

<200

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15
Q

Normal MIP (NIF or pIMAX)

A

-100 to -50

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16
Q

critical MIP (NIF or pIMAX) for intubation

A

-20 to 0

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17
Q

Normal Maximum expiratory pressure (MEP)

A

100

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18
Q

Critical Maximum expiratory pressure (MEP) for intubation

A

<40

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19
Q

normal Vital capacity (range)

A

65-75

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20
Q

critical vital capacity for intubation (range)

A

<10 to 15

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21
Q

normal Tidal volume

A

6-8

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22
Q

critical tidal volume for intubation

A

<5

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23
Q

normal RR (f)

A

12-20

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24
Q

critical RR(f) for intubation

A

> 35

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25
Q

normal Forced expired volume at 1 sec (FEV1) range

A

50-60

26
Q

critical Forced expired volume at 1 sec (FEV1) for intubation

A

<10

27
Q

Normal Peak expiratory flow (PEF) (range)

A

350-600

28
Q

critical Peak expiratory flow (PEF) for intubation (range)

A

75-100

29
Q

Equations
Minute ventilation

A

VE= VT x RR

30
Q

Alveolar ventilation

A

VA= (VT-VD) x RR

31
Q

Static compliance

A

Cs= VT/Pplat-PEEP (big # goes on inside)

32
Q

Dynamic compliance

A

Dyna= VT/ PIP-PEEP (big # goes on inside)

33
Q

Airway resistance

A

Raw=PIP-Pplat/ Flow (L/sec divide by 60)
(Big # goes on the inside)

34
Q

Ideal Body Weight (IBW)

A

M- 106+6 (H-60)/2
F- 105+ 5 (H-60)/2

35
Q

Tidal volume

A

VE=VT x RR (small # goes on the inside and move the decimal 3 times)
(find out the VT)

36
Q

Respiratory rate

A

VE=VT x RR (small # goes on inside move the decimal)
(find out the RR)

37
Q

VD/VT ratio

A

Paco2-Peco2/Paco2 (small # goes on inside)

38
Q

Systemic Vascular Resistance

A

SVR= (MAP-CVP)/Q x 80

39
Q

Pulmonary Vascular Resistance (PVR)

A

PVR=(MPAP-PAOP)/Q x 80

40
Q

Mean arterial pressure

A

MAP= CO x SVR
and
MAP= Volume/ Capacity

41
Q

Cardiac output

A

CO=HR x SV

42
Q

Weaning parameters (ok to extubate)
Vital capacity (VC)

A

> 15 mL/kg

43
Q

Weaning parameters (ok to extubate)
Minute ventilation VE (range)

A

<10 to 15

44
Q

Weaning parameters (ok to extubate)
VT (range)

A

> 4 to 6mL/kg

45
Q

Weaning parameters (ok to extubate)
f (RR)

A

<35 breaths/min

46
Q

Weaning parameters (ok to extubate)
f/Vt (RSBI)

A

<60 -105 breaths/min/ L
(spontaneously breathing pt)

47
Q

Weaning parameters (ok to extubate)
Ventilatory pattern

A

Synchronous and stable

48
Q

Weaning parameters (ok to extubate)
Pimax (NIF or MIP)

A

<-20 to -30 cm H20

49
Q

Weaning parameters (ok to extubate)
P 0.1

A

0 to -2 cm H20

50
Q

Weaning parameters (ok to extubate)
WOB

A

<0.8 J/L

51
Q

Weaning parameters (ok to extubate)
oxygen cost of breathing

A

<15 % total V02

52
Q

Weaning parameters (ok to extubate)
Dynamic compliance

A

> 25 mL/cm H20

53
Q

Weaning parameters (ok to extubate)
VD/Vt

A

<0.6

54
Q

Weaning parameters (ok to extubate)
CROP index

A

> 13 mL/breaths/min

55
Q

Weaning parameters (ok to extubate)
PaO2

A

greater than or equal to 60 (FiO2 <0.4)

56
Q

Weaning parameters (ok to extubate)
PEEP (range)

A

less than or equal to 5- 8 cm H20

57
Q

Weaning parameters (ok to extubate)
PaO2/FiO2 (P/F ratio)

A

> 250 mm Hg (consider at 150- 200 mm Hg)

58
Q

Weaning parameters (ok to extubate)
PaO2/ PAO2

A

> 0.47

59
Q

Weaning parameters (ok to extubate)
P(A-a)O2

A

<350 mm Hg (FiO2=1)

60
Q

Weaning parameters (ok to extubate)
%Qs/ Qt (range)

A

<20% to 30%

Topics of Respiratory Care (20 decks)

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