MIS

Question 1

What is the preferred light source for MIS surgery?

Answer 1

Xenon, as it emits a high intensity light that closely reproduces the color of natural light (as compared to halogen)

Question 2

What level of mechanical insufflation in the thoracic cavity causes significant cardiorespiratory depression?

Answer 2

3 mmHg

Question 3

What intra-abdominal pressure has been shown to result in acceptable levels of cardiorespiratory pressure and adequate working space in dogs?

Answer 3

15 mmHg - but levels of 8-10 mmHg are often adequate

Question 4

What level of intra-abdominal pressure is tolerated in cats?

Answer 4

Study showed no significant cardiopulmonary compromise with intraabdominal pressures up to 8 mmHg, with little increase in working volume when pressures increased above this level

Question 5

What is the most common gas used for insufflation?

Answer 5

CO2 - cheap, colorless, unlikely to combust, highly soluble so unlikely to form gas emboli, rapidly excreted from the body

Question 6

What size vessels is the Harmonic ace tip vessel sealing device indicated for?

Answer 6

Up to 5mm

Question 7

What are the available lengths and staple leg lengths of endoGIA stapling devices?

Answer 7

Lengths: 30, 45, 60mm
Leg lengths: 2.0, 2.5, 3.5, 4.8 (4.8 requires passage down a 15mm cannula)

Question 8

What limits perfusion to the collapsed lung in one lung ventilation?

Answer 8

Hypoxic pulmonary vasoconstriction