Pt Assessment Flashcards by Jennifer welch

Q

WOB

A

^ P * ^ V

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Q

Smoking history

A

Pack years = # of packs/day * # of years smoked

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Q

MV

A

VT * RR

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Q

VA alv min ventilation

A

( VT - VD ) *RR

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Q

VD/VT

A

PACO - peco2 / Paco2 * 100

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Q

Dead space

A

VD/VT * VT

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Q

Alv o2 tension

A

Pao2 = (PB-PH20) * fio2 - paco2/ .8

Or paco2 * 1.25

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Q

Alv art o2 gradient

P(A-a) o2

A

PAo2 - Pao2

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Q

Arterial oxygen content

CaO2

A

(Hb* 1.34 * Sao2) represents RBC +

(PaO2 * 0.003) Oxygen in plasma

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Q

Mixed venous oxygen content

CvO2

A

(Hb * 1.34 * Svo2) o2 in RBC +

(Pv o2 * .003) o2 in plasma

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Q

Art-Ven O2 content difference

C(a-v) O2

A

CaO2 - CvO2

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Q

SaO2 estimate

A

PaO2 + 30

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Q

P F ratio

A

PaO2 / Fio2

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Q

Mean art press

MAP

A

( 2 * diastolic ) + systolic / 3

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Q

Pulse pressure

A

Systolic - diastolic

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Q

Cardiac output. Fick equation (QT)

A

VO2/ C (a-v) O2 (10)

Q

Cardiac output - stroke volume equation (QT)

A

Heart rate * stroke volume

Q

Cardiac index CI

A

QT /BSA

Q

Systemic vascular resistance

SVR

A

(MAP - CVP) / cardiac outcome

To convert dynes, mult mmHg/L/min by 80

Q

Pulm vascular resistance

PVR

A

(MPAP - PWP) /

Cardiac output

To convert to dynes, mult mmHg/L/min by 80

Q

Resp quotient

RQ

A

VCO2 /

VO2