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china latest news about Vacuum Blood Collection Tubes: Physics, Applications, and Industry Best Practices

Vacuum Blood Collection Tubes: Physics, Applications, and Industry Best Practices

March 20, 2025

1. The Physics of Vacuum-Driven Blood Collection (H3) 1.1 Pressure Differential & Fluid Dynamics Vacuum tubes rely on Bernoulli’s principle and pressure gradients to draw blood. The pre-evacuated tube creates a negative pressure (typically 20–30 kPa), which overcomes venous pressure (5–15 mmHg). The ...