Patent ID: 8337452

Claim:
A surgical device comprising: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber, the inlet flow passage including a curved portion; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than a diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage, wherein inertance L is expressed by L=ρ×h/S, where density of fluid is ρ, cross-sectional area of flow passage is S, and length of the flow passage is h, and inertance L 1 on the inlet flow passage is greater than inertance L 2 on the outlet flow passage.