What is the normal interstitial fluid pressure measurement?

• A. 0 mmHg
• B. 6.3 mmHg
• C. -6.3 mmHg
• D. -10 mmHg

Answer: (C)

Interstitial fluid pressure is typically negative due to the hydraulic gradient created in tissues, which helps maintain fluid balance and prevent tissue edema. A normal interstitial fluid pressure measurement is usually around -6.3 mmHg, indicating a negative pressure environment that supports the absorption of lymphatic fluid and regulates interstitial fluid dynamics.

The normal negative pressure helps to facilitate the movement of fluids and nutrients into cells and the removal of waste products. This negative interstitial fluid pressure counterbalances the hydrostatic pressure from capillaries and is crucial in maintaining system equilibrium.

In understanding interstitial pressures, it is also important to note that while some other measurements can be positive (like those related to blood pressure), the typical values for interstitial fluid pressure are negative, highlighting the unique characteristics of tissue fluid dynamics.