What term describes the pressure difference between the inside of a vein and the surrounding tissue?

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Prepare for the Clinical Sonography III Exam with flashcards and multiple choice questions. Each question includes hints and explanations. Excel in your exam!

Multiple Choice

What term describes the pressure difference between the inside of a vein and the surrounding tissue?

Explanation:
Transmural pressure is the pressure difference across the vein wall, between inside the vein and the surrounding tissue. It equals intraluminal pressure minus extravascular (tissue) pressure and determines how much the vein wall distends or collapses. This gradient is what defines the wall tension across the vessel. The other terms describe either the pressure inside the lumen (intravascular or venous pressure) or pressure arising from gravity in a fluid column (hydrostatic pressure) and do not specify the wall-to-outside difference.

Transmural pressure is the pressure difference across the vein wall, between inside the vein and the surrounding tissue. It equals intraluminal pressure minus extravascular (tissue) pressure and determines how much the vein wall distends or collapses. This gradient is what defines the wall tension across the vessel. The other terms describe either the pressure inside the lumen (intravascular or venous pressure) or pressure arising from gravity in a fluid column (hydrostatic pressure) and do not specify the wall-to-outside difference.

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