MEDICAL DEVICES FOR ACCESSING BODY LUMENS

摘要

Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a medical guidewire including a core wire. The core wire may include a distal constant diameter, a first tapered section, an intermediate constant diameter section, a second tapered section, and a proximal constant diameter section. The distal end of the first tapered section may be attached to the proximal end of the distal constant diameter section such that a first inflection point is defined where the distal end of the first tapered section and the proximal end of the distal constant diameter section meet. The core wire may be configured such that when a first predetermined longitudinal force is applied to the distal end of the distal constant diameter section along the longitudinal axis, the distal constant diameter section prolapses such that a first loop is defined about the first inflection point.

主权项

1. A medical guidewire, comprising:
a core wire having a longitudinal axis, the core wire including:
a distal constant diameter section having a distal end and a proximal end, the distal end of the distal constant diameter section defining a distal end of the core wire;a first tapered section having a distal end and a proximal end, the distal end of the first tapered section being attached to the proximal end of the distal constant diameter section such that a first inflection point is defined where the distal end of the first tapered section and the proximal end of the distal constant diameter section meet;an intermediate constant diameter section having a proximal end and a distal end, the distal end of the intermediate constant diameter section being attached to the proximal end of the first tapered section;a second tapered section having a proximal end and a distal end, the distal end of the second tapered section being attached to the proximal end of the intermediate constant diameter section such that a second inflection point is defined where the distal end of the second tapered section and the proximal end of the intermediate constant diameter section meet; anda proximal constant diameter section having a proximal end and a distal end, the distal end of the proximal constant diameter section being attached to the proximal end of the second tapered section;wherein the core wire is configured such that when a first predetermined longitudinal force is applied to the distal end of the distal constant diameter section along the longitudinal axis, the distal constant diameter section prolapses such that a first loop is defined about the first inflection point.