Coronary sinus inspiration catheter

A coronary sinus inspiration catheter, wherein the coronary sinus inspiration catheter comprises a catheter head section and an extension tube, wherein the catheter head section and the extension tube are hollow tubular structures, the catheter head section and a distal section of the extension tube are substantially arc-shaped, the catheter head section comprises a proximal end and a distal end, the extension tube extends from the proximal end of the catheter head section and a diameter of the extension tube is consistent, the catheter head section comprises an arc section and a bend section, the arc section is disposed at the proximal end of the catheter head section and is arc-shaped, the bend section is disposed at the distal end of the catheter head section, the bend section is a straight or slightly arc-shaped structure;

• the bend section is connected to the arc section, and the bend section extends toward the center of an arc of the arc section;
• the catheter head section is provided with a flow communication hole, the diameter of the catheter head section decreases gradually from the proximal end to the distal end, the flow communication hole comprises an end hole and a plurality of side holes, the end hole is positioned at the end surface of the distal end of the catheter head section, the side holes are disposed on the wall of the catheter head section, a sum of the areas of the end hole and the side holes is larger than a cross-sectional area of the proximal end of the catheter head section, and less than 1.5 times of the cross-sectional area of the proximal end of the catheter head section.