Which of the following statements regarding colloid statements is TRUE?
a. Colloids readily diffuse into the extravascular space for fluid replacement.
b. Colloids exert osmotic pressures that draw fluids into the vascular space for volume replacement.
c. Colloids do not contain proteins or sugars; therefore they do not make suitable solutions for volume replacement.
d. Colloids are inexpensive, have and long shelf-life, and are widely used among most EMS communities.
b
Rationale: a. Due to the large molecular size and weight, colloids remain in the vascular space.
b. Correct.
c. Colloids are generally protein-containing solutions, or have large sugar molecules (such as Dextran) and are suitable volume expanders.
d. Colloids are expensive, have a short shelf-life, and are infrequently used in the EMS community.
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