Guidewire Types and Applications
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Questions and Answers

What are hydrophilic guidewires mostly used for?

  • To provide a supportive rail
  • To negotiate stenoses
  • To support catheters
  • To cross even the tightest stenosis (correct)
  • What is the main purpose of a non-steerable guidewire?

  • To provide a supportive rail (correct)
  • To negotiate stenoses
  • To support catheters
  • To cross even the tightest stenosis
  • What are hybrid guidewires?

  • A combination of a steerable and a non-steerable wire
  • A combination of a stiff and a non-steerable wire
  • A combination of a steerable and a stiff wire (correct)
  • A combination of a steerable and a hydrophilic wire
  • Study Notes

    • Guidewires come in a variety of shapes and sizes, with different purposes and capabilities.
    • Non-steerable guidewires provide a supportive rail that allows the catheter to be advanced into position, but are not designed to negotiate stenoses or select branch vessels.
    • Steerable guidewires have shaped tips, and are constructed with good torque control so that when the shaft is rotated the tip turns a corresponding amount. This allows responsive 'steering'.
    • Hydrophilic guidewires are mostly steerable wires, which have a slippery 'hydrophilic' coating. This allows the wire to cross even the tightest stenosis if used properly.
    • Stiff guidewires are heavy-duty wires with particularly supportive shafts. A stiff wire may be required to support catheters/devices as they pass through occlusions/scar/fibrotic tissue or around challenging anatomy.
    • In some wires, the transition point is visible on fluoroscopy as the flexible tip is usually more radio-opaque.
    • Hybrid guidewires are a more recent development combining a steerable floppy tip with a supportive shaft. They are often pretty close to the original separate wires, and save both money and wire exchanges.

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    Description

    Learn about the different types of guidewires, including non-steerable, steerable, hydrophilic, stiff, hybrid, and their respective purposes and capabilities. Understand the features and characteristics of each type of guidewire for medical procedures.

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