Pulmonary Pressures

Question 1

PASP equation WITHOUT PS and what are the steps?

Answer 1

PASP = 4(V tr)² + RAP

1st → CW- PSAX AV - TV - PEAK VELOCITY - SYSTOLE
2nd we evaluate IVC = RAP
3rd we calculate

Question 2

PASP equation WITH PS and what are the steps?

Answer 2

PASP = [4(V tr)² + RAP] - [4(V ps)²]

1st → CW- PSAX AV - TV - PEAK VELOCITY - SYSTOLE
2nd we evaluate IVC = RAP
3rd → CW- PSAX AV - PV - PEAK VELOCITY - SYSTOLE

Question 3

What is a NORMAL RAP?

Answer 3

0-5 mmHg

Question 4

What are the RAP Norms?

Answer 4

IVC ≤ 2.1 > 50% collapse 3mmHg
IVC > 2.1 > 50% collapse 8mmHg
IVC ≤ 2.1 < 50% collapse 8mmHg
IVC > 2.1 < 50% collapse 15mmHg

Question 5

What are the PASP Norms?

Answer 5

Mild PHTN: 36-50 mmHg
Mod PHTN: 51-70 mmHg
Severe PHTN: >70 mmHg

Question 6

How can you calculate % of collapse?

Answer 6

eye ball or

widest diameter - smallest diameter x 100
widest diameter

Question 7

What is the PADP or PAEDP equation?

Answer 7

PADP = 4 (PI EDV)² + RAP

Question 8

What are the steps for finding PADP?

Answer 8

1st. CW - PSAX AV - PV - EDV - DIASTOLE
2nd. we evaluate IVC for RAP via M Mode or eyeball

Question 9

What are the PADP Norms?

Answer 9

Normal ≤ 12 mmHg
PHTH > 12 mmHg

Question 10

What is PAC and what determines it?

Answer 10

-used to find MPAP
-time from the start of pulmonic flow to peak velocity
-with the PW SG in the RVOT proximal of PV

Question 11

List the steps to acquire a PAC

Answer 11

PW - PSAX AV - RVOT prox of leaflets - PAC- SYSTOLE

Question 12

What is the most common MPAP REGRESSION equation?

Answer 12

MPAP = 79 - (.45 x PAC)

Question 13

What is the 1/3 2/3 MPAP Equation?

Answer 13

MPAP = ⅓ PASP + ⅔ PAEDP

Question 14

What is the TR MPG MPAP Equation?

Answer 14

MPAP = MPG on TR jet + RAP

Question 15

What is the PEAK PI MPAP Equation?

Answer 15

MPAP = 4 (MAX PI velocity)² + RAP

Question 16

What are the MPAP Norms?

Answer 16

Normal < 25 mmHg
PHTN ≥ 25 mmHg

Question 17

In the care unit, the catheter is typically inserted into?

Answer 17

subclavian vein

Question 18

Central Venous Line is advanced into? & what does it measure?

Answer 18

-lower third of the SVC near the RA
- central venous pressure wave that resembles RA pressure wave

Question 19

What is a nomarl CVP/RAP?

Answer 19

0-5 mmHg

Question 20

What conditions elevate CVP?

Answer 20

1. heart failure
2. tension pneumothorax
3. pericardial restriction
4. septic shock

Question 21

What conditions lower CVP?

Answer 21

1. hypovolemia
2. venodilation

Question 22

Swan Ganz Catheter is advanced into? & what does it measure?

Answer 22

-the right heart with its tip at the PA bifurcation
- RA and RV pressures

Question 23

What are advantages Swan Ganz Catheter?

Answer 23

1. accurate
2. ability to measure continuously over days
3. PVR can be calculated

Question 24

What are disadvantages of Swan Ganz Catheter?

Answer 24

1. cost and potential complications