Puncture system

A puncture system, comprising an interventional navigation system and a puncture instrument;

• the interventional navigation system comprises an electromagnetic positioning module, a navigation processing module and a navigation output module, wherein,
• the electromagnetic positioning module is connected with an ultrasonic imaging device and the puncture instrument, configured to obtain position and direction of an ultrasonic image generated by the ultrasonic imaging device and position and direction of the puncture instrument;
• the navigation processing module is connected with the ultrasonic imaging device and the electromagnetic positioning module, configured to generate a puncture path based on the position and direction of the puncture instrument, and orthographically project the puncture instrument and the puncture path onto the ultrasonic image to generate a navigation image that fuses a projection of the puncture instrument and the puncture path based on the position and direction of the ultrasonic image, the position and direction of the puncture instrument, and the puncture path;
• and
• the navigation output module is connected with the navigation processing module, configured to output the navigation image based on a set display mode,
• wherein the puncture instrument comprises a puncture needle which comprises a sensor mounting portion, and the sensor mounting portion is capable of mounting a sensor of the electromagnetic positioning module, wherein the sensor mounting portion is an internal cavity of the puncture needle or a concave portion of body surface of the puncture needle,
• wherein the puncture instrument comprises an interventional catheter instrument, which comprises:
• a guide tube;
• and
• a flexible sleeve which sleeves outside the guide tube;
• wherein the flexible sleeve and the guide tube are capable of moving relatively to each other so that a distal end of the flexible sleeve extends beyond a distal end of the guide tube, or the distal end of the guide tube extends beyond the distal end of the flexible sleeve,
• wherein the distal end of the flexible sleeve is provided with a shrunk portion, an inner diameter of the shrunk portion is smaller than an outer diameter of the guide tube, and the shrunk portion is provided with a weakened portion which is easy to be damaged;
• when the interventional catheter instrument abuts against a puncture target, the weakened portion is capable of being destroyed by causing the guide tube to move to the distal end relative to the flexible sleeve, so that the guide tube extends beyond the distal end of the flexible sleeve;
• wherein the weakened portion extends to a distal opening of the flexible sleeve;
• and
• the weakened portion is provided on an inner surface or an outer surface of the shrunk portion.