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Hemodynamics > 6/5/23 Notes > Flashcards

6/5/23 Notes Flashcards

1
Q

What is anatomic dead space?

A

1mL/lb

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2
Q

What are some areas where volume is lost in the patient conducting airway and where no gas exchange occurs?

A

Trachea & bronchi

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3
Q

What are some devices that can increase or decrease the amount of Vdmech added to the breathing circuit.

A

• ETT
• closed suction system
• HMEs

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4
Q

What is the formula for Ve?

A

Vt x RR

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5
Q

What is the formula for VA?

A

(Vt-Vd) x F

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6
Q

What are the 2 factors that must be considered in determining VA?

A

• Anatomical dead space
• Mechanical dead space

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7
Q

What are some things that can add mechanical dead space to to the vent circuit and affect the the Vd/Vt.

A

• HMEs
• Closed suction system
• Other circuit adapters

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8
Q

Adjustment in flow rate alters _____?

A

Ti

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9
Q

I:E ratio is adjusted by what 3 vent controls?

A

• Vt control
• Flow rate
• RR

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10
Q

Increased Flow =

A

Decreased Ti

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11
Q

Decreased flow =

A

increased Ti

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12
Q

Higher Vt =

A

Higher Ti

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13
Q

Lower Vt =

A

Lower Ti

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14
Q

Increased RR =

A

Decreased Te

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15
Q

Decreased RR =

A

Increased Te

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16
Q

What is TCT?

A

Ti + Te

17
Q

After you get your answer for TCT what do you divide by to get the RR?

A

60
Ex. TCT=Ti+Te
60 s/TCT = F

18
Q

How do you improve O2?

A
  1. Increased FiO2
  2. PEEP (refractory hypoxemia)
  3. Improve ventilation
  4. APRV or Bilevel ventilation (focuses on MAP)
  5. Pressure control with inverse ratio ventilation
  6. Proning
19
Q

What is inverse ratio?

A

Ti is longer than Te
Ex. 1:2 ➡️ 2:1

20
Q

What does inverse ratio help with?

A

More time for inspiration and gas exchange

21
Q

What is the normal TCT?

A

3-5 secs; RR 12-20 bpm

22
Q

What is the Vt & rate for COPD pts?

A

6-8mL/kg ; 8-12 bpm

23
Q

What are the formula for Vt?

A

Vt = Ve/RR

24
Q

What is the formula for Raw?

A

PIP-Pplat/Flow

25
Q

What is the formula for the A-a gradient?

A

PAO2-PaO2

26
Q

What is the formula for dynamic compliance?

A

VT/PIP-PEEP

27
Q

What is the formula for dead space?

A

PaCO2-PeCO2/PaCO2

28
Q

What is the formula for static compliance?

A

CS = VT/(Pplat − PEEP)

29
Q

T or F Dividing by different RR gives different times?

A

True
Ex. 7-6 sec

30
Q

What is the formula for flow?

A

VT/Ti

31
Q

What is the formula for RR?

A

RR= Ve/Vt

32
Q

What it’s the equation for I:E ratio?

A

I:E = Ti/Te

Hemodynamics (14 decks)

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