Ultrasound puncture system

A ultrasound puncture system comprising:

• a handpiece which accommodates an ultrasound vibrator as ultrasound wave generating means;
• a puncturing probe for transmitting ultrasound waves to a biological wall which is to be punctured;
• an outer cover tube which covers the probe and is detachably attached to the handpiece;
• an ultrasound power source unit for supplying energy for driving the ultrasound vibrator;
• termination means installed in the ultrasound power source unit for terminating the energy supply to the ultrasound vibrator;
• and
• impedance detection means installed in the ultrasound power source unit for detecting the puncture state when the probe punctures the biological wall, wherein
• the penetration of the probe through the biological wall is detected with the impedance detection means and the supply of energy to the ultrasound vibrator is terminated by the detection output wherein a first electrode and a second electrode are provided in the ultrasound power source unit;
• one of the electrodes is connected to so as provide for electric conductivity to the probe;
• and
• the system further comprises discrimination means for converting the impedance between the electrodes and judging the results detected with the impedance detection means;
• wherein
• the outer cover tube is composed of a non-conductive member and a conductive member;
• the non-conductive member is disposed on the inner surface of the outer cover tube, which is in contact with the probe;
• and
• the second electrode is electrically connected to the conductive member of the outer cover tube.

A ultrasound puncture system comprising:

• a handpicce which accommodates an ultrasound vibrator as ultrasound wave generating means;
• a puncturing probe for transmitting ultrasound waves to a biological wall which is to be punctured;
• an outer cover tube which covers the probe and is detachably attached to the handpiece;
• an ultrasound power source unit for supplying energy for driving the ultrasound vibrator;
• termination means installed in the ultrasound power source unit for terminating the energy supply to the ultrasound vibrator;
• and
• impedance detection means installed in the ultrasound power source unit for detecting the puncture state when the probe punctures the biological wall, wherein
• the penetration of the probe through the biological wall is detected with the impedance detection means and the supply of energy to the ultrasound vibrator is terminated by the detection output;
• wherein
• means for supplying the energy to the ultrasound vibrator and fluid supply means for supplying a fluid into the space between the outer cover tube and the probe are separate units;
• each of those units comprises communication means for causing them to operate in response to each other;
• and
• fluid supply means supplies the fluid to the vibrator via the communication means in response to the energy supply.

A ultrasound puncture system comprising:

• a handpiece which accommodates an ultrasound vibrator as ultrasound wave generating means;
• a puncturing probe for transmitting ultrasound waves to a biological wall which is to be punctured;
• an outer cover tube which covers the probe and is detachably attached to the handpiece;
• an ultrasound power source unit for supplying energy for driving the ultrasound vibrator;
• termination means installed in the ultrasound power source unit for terminating the energy supply to the ultrasound vibrator;
• and
• impedance detection means installed in the ultrasound power source unit for detecting the puncture state when the probe punctures the biological wall, wherein
• the penetration of the probe through the biological wall is detected with the impedance detection means and the supply of energy to the ultrasound vibrator is terminated by the detection output;
• wherein a sheath is further disposed between the probe and the outer cover tube, and means is provided for causing the distal end of the sheath to protrude forward beyond the distal end portion of the probe in response to an output of the impedance detection means that detected that the distal end portion of the probe has penetrated through the biological wall.