Abstract: A catheter retainer and a catheter-protecting device including the catheter retainer are disclosed. The catheter retainer defines a channel configured for passage of a pre-shaped section of a catheter therethrough. The channel includes a first channel section and a second channel section. The first channel section is configured for passage of a straight section of a tip of the catheter therethrough, and the second channel section is configured for passage of a bent section of the tip of the catheter therethrough. The catheter retainer including the first channel section and the second channel section is able to ensure that an angle of a pre-shaped end of the catheter can be maintained without decreasing for a long time, allowing an operator to directly use and deploy the catheter at a lesion site without having to subjecting it to a steam shaping process. This can reduce the time required for preoperative preparation.

Abstract: A catheter reinforcement layer (100) and a catheter (10). The catheter reinforcement layer (100) includes a spring component (110) and at least one axial component (120). The at least one axial component (120) extends along the spring component (110) from a proximal end to a distal end, and has at least one intersection with the spring component (110). According to the catheter reinforcing layer (100), by introducing one or more axial components (120) into a reinforcing layer of an existing spring component (110), the axial modulus of the catheter (10) is increased, thereby avoiding axial deformation or even breakage of the tubular body of the catheter (10) due to axial force.

Abstract: A medical catheter and a method for fabricating it are disclosed. The medical catheter includes a catheter body including a proximal section and a distal section sequentially arranged along an axis. Stiffness of the proximal section is greater than stiffness of the distal section. The distal section includes a transition section and a flexible section from a proximal end to a distal end thereof. Stiffness of the flexible section is smaller than stiffness of the transition section. The stiffness of the transition section gradually decreases from a proximal end to a distal end thereof. A ratio of an axial length of the flexible section to an axial length of the transition section is 0.05-0.4. This axial stiffness design of the medical catheter can achieve a balance between its accessibility and support performance, which can result in better therapeutic outcomes of a surgical procedure.