Quiz 4 Flashcards
1
Q
usually for single vessel LIMA to LAD bypass
A
MID-CAB
2
Q
CaO2 (oxygen content) =
A
1.31 x Hgb x SaO2 + 0.003PaO2
3
Q
look at slide 11
A
.
4
Q
OPCAB anesthetic management (6):
A
- GETA with or without Thoracic Epidural
- Monitors – Arterial Line, CVP, PAC, TEE, Cerebral Oximetry, 5Lead EKG, Standard ASA monitors
- Warming Device (forced air, blanket)
- IVF – Fluid warmers, Colloid vs Crystalloid, RBCs
- Drugs – Low dose Heparin, Antifibrinolytics, Narcotics
- CPB on Backup
5
Q
Graft Harvesting : (4)
A
- LIMA
- RIMA
- LSVG
- LRad
6
Q
look at slide 15
A
.
7
Q
Risks of OPCABG Surgery (6):
A
- Direct trauma to myocardium
- Unprotected myocardium with occlusion of coronary targets
- Decreased cardiac function intra-op
- Decreased Cardiac Output / Organ perfusion / Systemic Pressure
- Increased requirement for drips intra-op
- Decreased graft patency due to technical difficulty or thrombosis
8
Q
How much oxygen does the heart extract?
A
65 - 75 %
9
Q
What is the benefit of doing a MIDCAB?
A
-Thoracotomy approach (NO incision through the sternum)
10
Q
What vessels are involved in a MIDCAB?
A
LIMA to LAD
11
Q
What contributes the most to cardiac O2 demand?
A
HR
12
Q
Which has more O2 extraction the SVC or the IVC?
A
SVC
13
Q
What are a few things that affect mixed venous oxygen?
A
- Anemia
- FiO2
- PEEP
- Temperature
- CO
14
Q
What arteries branches off the Left Main Coronary Artery?
A
- Left Anterior Descending (LAD)
- Circumflex
15
Q
The Circumflex perfuses the SA node in ___% of people
A
40
