Optical imaging probe connector method by deforming a cross section and cutting at an oblique angle
An elongated optical guidewire assembly, such as for optically imaging a patient from within another catheter, can have a lead portion and a probe portion. A connector between the lead and probe portions can include a bore including first and second bore ends. The first bore end can include a substantially circular cross-sectional profile. The second bore end can include a substantially non-circular cross-sectional profile. The bore can be configured to receive the optical guidewire assembly at the first bore end and configured to deform the optical guidewire assembly at the second bore end such that probe and lead ends of the optical guidewire assembly are deformed into a substantially non-circular profile and located between the first and second bore ends.
1. A method of making a guidewire assembly connector, the method comprising:
providing a length of optical guidewire having a core wire extending substantially the length of the guidewire and a plurality of optical fibers positioned about the core wire and extending substantially the length of the guidewire;
enclosing a portion of the guidewire and a portion of the plurality of optical fibers within a deformable tube having an outer diameter;
providing a ferrule with a bore with a circular cross section at a first end and a non-circular cross section away from the first end;
deforming a portion of the tube and the enclosed guidewire using the ferrule;
cutting the tube and the enclosed guidewire through the deformed portion of the tube at an oblique angle, the cutting providing resulting first and second portions that are configured to respectively provide oblique angle beveled first and second ends that are mirror images of each other, wherein the first and second ends are configured to be mechanically self-aligned and coupled together and optically couple together at the respective first and second ends; and
providing the ferrule for coupling the first and second ends together.
2. The method of claim 1 , wherein deforming a portion of the tube and enclosed guidewire includes pushing a portion of the tube and enclosed guidewire through the bore of the ferrule from the first end of the bore through a second end of the bore.
3. The method of claim 1 , wherein deforming a portion of the tube and enclosed guidewire includes deforming a portion of the tube and enclosed guidewire from a substantially circular cross section to a substantially square cross section.
4. The method of claim 3 , wherein deforming includes deforming less than 10 mm of the tube and enclosed guidewire to a substantially square cross section.
5. The method of claim 1 , wherein cutting the tube and enclosed guidewire includes cutting a slot in the ferrule.
6. The method of claim 1 , wherein cutting the tube and enclosed guidewire includes securing the tube and guidewire to the ferrule near a second end of the bore.
7. The method of claim 1 , wherein cutting the tube and enclosed guidewire includes stabilizing relative positions of the core wire and the plurality of optical fibers.
8. The method of claim 7 , wherein cutting the tube and enclosed guidewire includes stabilizing relative positions of the core wire and the plurality of optical fibers using a flowable and later hardenable substance.
9. The method of claim 1 , further comprising coupling the first end to the second end, wherein coupling the first end to the second end includes inserting the first end into the first end of the ferrule.