Mechanical retainer systems for electrodes of a basket catheter, and methods of the same

A medical probe, comprising:

• a tubular shaft having a proximal end and a distal end, the tubular shaft extending along a longitudinal axis;
• and
• an expandable basket assembly coupled to the distal end of the tubular shaft, the basket assembly comprising:
• a plurality of electrodes, each electrode of the plurality of electrodes having a lumen therethrough;
• and
• a plurality of spines extending along the longitudinal axis and configured to bow radially outward from the longitudinal axis when the expandable basket assembly is transitioned from a collapsed form to an expanded form, each spine of the plurality of spines comprising:
• a proximal end;
• a distal end;
• a first strut and a second strut each passing through the lumen of an electrode of the plurality of electrodes, the first strut and the second strut each comprising a respective protrusion and being configured to be compressible toward each other to allow the respective protrusions to slide through the lumen of the electrode;
• and
• a third strut positioned between the first strut and the second strut, the third strut comprising a bend forming a spring bias in the third strut to form a friction fit with the electrode, each of the first strut, the second strut, and the third strut being configured to prevent the electrode from sliding proximally or distally along a length of the spine.