Ultrasonic trocar and method for using the ultrasonic trocar

A method for using an ultrasonic trocar which retains a cannula of an ultrasonic trocar to a somatic wall, the method comprising:

• attaching a probe to an ultrasonic transducer and forming a handpiece unit;
• inserting the probe of the handpiece unit through a dilator removably arranged on the outside of the handpiece unit, the dilator having a body portion equipped with an expanding portion, and a sheath which protrudes from a distal end of the body portion;
• inserting the dilator, through which the handpiece unit has been inserted, through the cannula retained to the somatic wall;
• generating ultrasonic vibration by the transducer, and transmitting the ultrasonic vibration from a proximal end to a tip end of the probe connected to the transducer;
• pressing the tip end of the probe against the somatic wall and forming a puncture hole in the somatic wall;
• removing the handpiece unit from the dilator;
• arranging the cannula to the puncture hole while the puncture hole is gradually expanded by the expanding portion of the dilator;
• and
• removing the dilator from the cannula.

A method for using an ultrasonic trocar which retains a cannula of an ultrasonic trocar to a somatic wall, the method comprising:

• inserting a dilator through the cannula retained to the somatic wall, the dilator having a body portion equipped with an expanding portion, and a sheath which protrudes from a distal end of the body portion;
• attaching a probe to an ultrasonic transducer and forming a handpiece unit;
• inserting the probe of the handpiece unit through the dilator;
• generating ultrasonic vibration by the transducer, and transmitting the ultrasonic vibration from a proximal end to a tip end of the probe connected to the transducer;
• pressing the tip end of the probe against the somatic wall and forming a puncture hole in the somatic wall;
• removing the handpiece unit from the dilator;
• arranging the cannula to the puncture hole while expanding the puncture hole by the expanding portion of the dilator;
• and
• removing the dilator from the cannula.