Pulse Length

Pulse length is the duration of each individual ultrasound “shot” a HIFU device fires — typically measured in milliseconds — and it affects how the energy is distributed within the treatment zone. Shorter pulses concentrate energy into a smaller, more precise area, useful for fine detail work such as around the eyes; longer pulses spread the same energy over a wider path, suited to broader areas like the cheeks or jawline. Most HIFU devices, including ULTRAISER’s, offer a short-pulse and long-pulse mode so the operator (or, for home devices, the user) can match the setting to the area being treated. Correct pulse-length selection matters for both comfort and safety: it helps ensure the ultrasound energy heats the targeted depth sufficiently for collagen stimulation without concentrating too much heat too quickly in one spot.