Acoustical streaming causes which phenomenon?

Acoustical streaming causes which phenomenon?

• A. Free flowing cells or particles moving toward the beam
• B. Decreased blood flow at the treatment site
• C. Permanent tissue damage
• D. Formation of scar tissue

Answer: (A)

Acoustical streaming is the steady motion of fluid generated by the absorption and nonlinear propagation of ultrasound energy. This creates a directional flow that can carry free-floating cells or particles toward the ultrasound beam, effectively moving them along with the stream. It’s a convective transport effect, not a direct cause of reduced blood flow or immediate tissue damage. Permanent damage or scar formation would come from stronger thermal or mechanical effects, not from streaming itself.

Acoustical streaming is the steady motion of fluid generated by the absorption and nonlinear propagation of ultrasound energy. This creates a directional flow that can carry free-floating cells or particles toward the ultrasound beam, effectively moving them along with the stream. It’s a convective transport effect, not a direct cause of reduced blood flow or immediate tissue damage. Permanent damage or scar formation would come from stronger thermal or mechanical effects, not from streaming itself.