Therapeutic device, therapeutic system and therapeutic method for myocardium repair

A therapeutic device for myocardial repair, comprising:

• a treatment needle for piercing into a myocardium to release therapeutant, which comprises:
• a needle body, which has a therapeutant delivery chamber inside thereof, and
• a needle head, which is located at a distal end of the needle body for piercing the myocardium and guiding the needle body to pass through the myocardium, wherein the needle head has a delivery therapeutant outlet that communicates with the therapeutant delivery chamber, and
• a pulling wire,
• wherein the pulling wire is movably provided in the needle body, and wherein a distal end of the pulling wire is connected to the needle head, and a proximal end of the pulling wire extends out of the needle body and functions as a force applying end for pulling the needle head to change an orientation thereof;
• a fixed handle which has an intermediate chamber inside thereof, and
• wherein a proximal end of the needle body is inserted into the fixed handle in a sealing manner, and the therapeutant delivery chamber of the needle body communicates with the intermediate chamber;
• and the proximal end of the pulling wire extends out of a proximal end of the fixed handle;
• a sealing cap provided at the proximal end of the fixed handle, and
• wherein the pulling wire passes through the sealing cap from the needle body through the intermediate chamber and engages with the sealing cap in a movable and sealing manner.