Catheter pump and mold

A catheter pump, wherein the catheter pump comprises a catheter and a pump head, the pump head is delivered to a desired location in heart via the catheter to pump blood;

• the pump head comprises a pump housing and an impeller housed within the pump housing, the pump housing has a blood inlet port and a blood outlet port;
• the impeller is driven to rotate to draw blood into the pump housing through the blood inlet port and then expel blood through the blood outlet port;
• the pump housing comprises a stent, the stent is operable to switch between a radially collapsed state and a radially expanded state;
• in the radially expanded state, the stent comprises a main body portion, an inlet portion located at an axial distal end of the main body portion, and an outlet portion located at an axial proximal end of the main body portion, the inlet portion and the outlet portion are both connected with the main body portion and support the main body portion;
• a proximal end of the outlet portion is connected with a proximal connecting portion, a distal end of the inlet portion is connected with a distal connecting portion;
• wherein, at least one of the proximal connecting portion and the distal connecting portion comprises a preformed member;
• in a natural state, a radial distance from an inner end of the preformed member to a central axis of the stent is less than a radial distance from an outer end of the preformed member to the central axis of the stent;
• the natural state is a state in which the stent is not assembled to the catheter pump.