Which of the following is NOT a Colloid?

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Prepare for the NOVA Clinical Anesthesia Exam. Study with flashcards and multiple choice questions, including detailed explanations and hints. Ace your exam with confidence!

Multiple Choice

Which of the following is NOT a Colloid?

Explanation:
Colloids are solutions that contain large molecules or proteins that stay mostly inside the blood vessels, increasing the oncotic pressure and expanding plasma volume more effectively per unit of fluid. Albumin is a natural colloid, dextrans are synthetic colloids, and whole blood acts as a colloid because of its plasma proteins and cellular components that stay intravascular. Normal saline is a crystalloid, composed of small solute particles that freely move across capillary walls. It distributes quickly between the intravascular and interstitial spaces, so it provides less sustained intravascular volume per milliliter than a colloid. Therefore, normal saline is not a colloid.

Colloids are solutions that contain large molecules or proteins that stay mostly inside the blood vessels, increasing the oncotic pressure and expanding plasma volume more effectively per unit of fluid. Albumin is a natural colloid, dextrans are synthetic colloids, and whole blood acts as a colloid because of its plasma proteins and cellular components that stay intravascular.

Normal saline is a crystalloid, composed of small solute particles that freely move across capillary walls. It distributes quickly between the intravascular and interstitial spaces, so it provides less sustained intravascular volume per milliliter than a colloid. Therefore, normal saline is not a colloid.

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