Physics of ANESTHESIA Part I | Barash

Question 1

The blood supply to the LV is directly dependent on the difference between the aortic diastolic pressure and LV end-diastolic pressure (coronary perfusion pressure) and inversely related to the vascular resistance to flow, which varies to the FOURTH power of the vessel radius. This is pertaining to:

A. Frank-Starling forces

B. Law of Laplace

C. Poiseuille law

Answer 1

C. Poiseuille law

Question 2

Describes the factors that determine left ventricular wall stress, which is a major determinant of myocardial oxygen demand. Tension development in each myocyte increases LV wall stress that is transformed into pressure when applied to a fluid.

A. Frank-Starling forces

B. Law of Laplace

C. Poiseuille law

Answer 2

B. Law of Laplace

Question 3

What is the formula of the law of laplace?

Answer 3

2T/R

Question 4

This law describes the surface tension at an air-fluid interface produces forces that tend to reduce the area of interface. For a bubble to remain inflated, the gas pressure within the bubble is contained by surface tension and must be higher than the surrounding gas pressure:

A. Frank-Starling forces

B. Law of Laplace

C. Poiseuille law

Answer 4

B. Law of Laplace

Question 5

This refers to the fact that each gas in a mixture will exert its own partial pressure, and in sum will equal the total pressure:

A. Dalton’s law

B. Henry’s Law

C. Poiseuille law

D. Charle’s Law

Answer 5

A. Dalton’s law

Question 6

Application of BOYLE’s law is clinically significant in anesthesia. What variable is constant in this application?

A. Temperature
B. Pressure
C. Volume

Answer 6

A. Temperature