JP2010053767A5 - - Google Patents

Claims (6)

A pulsation generator having a fluid chamber into which fluid flows, volume changing means for changing the volume of the fluid chamber, and an inlet channel and an outlet channel communicating with the fluid chamber;
A flow path pipe having a connection flow path with one end communicating with the outlet flow path and the other end communicating with the fluid ejection port;
A fluid supply pump for supplying fluid to the inlet channel;
Control means for controlling the change in volume of the fluid chamber by the volume changing means;
A distance detecting means for detecting a distance between the fluid ejection port and the fluid ejection object;
Wherein, said distance detecting means in accordance with the distance detected by the fluid jet surgical instrument and controlling the change of volume of the fluid chamber due to the volume changing means. The distance detecting means includes
A light source that emits light;
The light emitted from the light source part is guided to the fluid ejection port and emitted toward the fluid ejection object, and the light emitted toward the fluid ejection object is reflected by the fluid ejection object. An optical transmission unit that receives the reflected light and guides the received reflected light;
A light receiving unit that receives reflected light guided by the light transmission unit and outputs a signal corresponding to the received light;
A signal processing unit that calculates a distance between the fluid ejection port and the fluid ejection object based on the signal output by the light receiving unit;
The fluid ejection surgical instrument according to claim 1, further comprising: The volume changing means is a piezoelectric element,
The fluid ejecting surgical instrument according to claim 1, wherein the control unit controls a voltage applied to the piezoelectric element according to the distance detected by the distance detecting unit. The control unit controls the change of the volume of the fluid chamber by the volume changing unit so that the pressure of the fluid ejected from the fluid ejection port increases as the distance detected by the distance detection unit increases. The fluid ejection surgical instrument according to any one of claims 1 to 3. 2. The fluid supply pump according to claim 1, wherein a pressure for supplying a fluid to the inlet channel is 3 atm or less, and the fluid supply pump and the inlet channel are connected by a tube. 4. The fluid ejection surgical instrument according to claim 1. Supply fluid to the fluid chamber communicating with the connection flow path,
By changing the volume of the fluid chamber, the pressurized fluid is ejected from the fluid ejection port communicating with the connection flow path,
Detecting the distance between the fluid ejection port and the fluid ejection object;
The fluid ejecting method according to claim 1, wherein the change of the volume of the fluid chamber is controlled according to the detected distance.