Catheter tip assembled with a spring

A flexible catheter, comprising:

• a longitudinal catheter body extending from a proximal end to a distal end;
• and
• a flexible catheter tip located at said distal end of said catheter body, said flexible catheter tip comprising:
• a spring element having coils that taper distally to a distal edge of a distal end of said flexible catheter;
• and
• a jacket partially covering said spring element, wherein a proximal length of said spring element is embedded within said jacket, said jacket covering the proximal length but not a distal length of said spring element.

A flexible catheter, comprising:

• a longitudinal catheter body extending from a proximal end to a distal end;
• and
• a flexible catheter tip located at said distal end of said catheter body, said flexible catheter tip including a spring element that tapers distally to a distal edge of said flexible catheter;
• wherein said spring element is a wire coil having pitch space between 2 or more coils in a first region and no pitch space in a second region, said second region being distal of said first region.

A flexible catheter, comprising:

• a longitudinal catheter body extending from a proximal end to a distal end;
• and
• a flexible catheter tip located at said distal end of said catheter body, said flexible catheter tip comprising:
• a spring element, wherein said spring element is a wire coil having pitch space between 2 or more coils in a first region and tightly packed coils in a second region, said second region being distal of said first region;
• and
• a jacket that partially covers said spring element so that a plurality of said coils at a distal end of said spring element are not covered by said jacket.