Endoscopic methods and devices for transnasal procedures
Medical devices, systems and methods that are useable to facilitate transnasal insertion and positioning of guidewires and various other devices and instruments at desired locations within the ear, nose, throat, paranasal sinuses or cranium. Direct viewing of such placements via an endoscope.
1. A system comprising:
(a) a guide catheter having a distal end, wherein the distal end is configured to be inserted into a nostril of a patient, wherein the distal end of the guide catheter further comprises a curved portion; and
(b) an illuminating guidewire slidably disposed within the guide catheter, the illuminating guidewire comprising:
(i) a length sufficient to extend from exterior the patient through the patient's nasal cavity and into sinuses of the patient,
(ii) a flexible distal end portion comprising a coil,
(iii) a plurality of illumination fibers extending to and within said distal end portion, wherein said plurality of illumination fibers are configured to emit illuminating light of a character to provide transillumination of light from within the patient's sinuses to provide a glowing region on skin of the patient without causing trauma to tissue,
(iv) a proximal end portion comprising:
(A) at least one connecting structure configured to connect at least one illumination fiber of the plurality of illumination fibers with a power source, and
(B) an external casing enclosing together at least a proximal portion of each of the illumination fibers, wherein a distal end of said at least one connecting structure is fixed to a proximal end of said external casing, wherein a proximal portion of the coil is at least partially fixed to the external casing, and
(v) at least one core wire coil support, longitudinally disposed within said coil, said at least one core wire coil support comprising a structure distinct from the plurality of illumination fibers, at least a portion of each core wire coil support fixed to said coil.
2. The system of claim 1 , wherein said plurality of illumination fibers further comprises two illumination fibers each having a light emitting element located at a distal end of each illumination fiber.
3. The system of claim 2 , wherein said at least one coil support extends through said flexible distal end portion and only a portion of said proximal end portion.
4. The system of claim 1 , wherein said at least one coil support consists of two coil supports, wherein said two coil supports are fixed to said coil at predetermined locations along lengths of said two coil supports, wherein at least one fixation point of said first coil support is longitudinally offset in relation to a corresponding fixation point of said second coil support, thereby allowing said two coil supports to slide relative to one another when said coil bends.
5. The system of claim 1 , wherein said external casing is selected from the group consisting of a coil, a hypotube and a cable tube.
6. The system of claim 5 , wherein said external casing comprises a stainless steel cable tube attached to a proximal end of said flexible distal end portion, wherein said coil comprises stainless steel, and wherein said at least one coil support comprises Nitinol.
7. The system of claim 1 , wherein said at least one coil support further comprises:
(i) a proximal portion,
(ii) a tapered portion distal to said proximal portion, and
(iii) a flattened distal portion distal to said tapered portion.
8. The system of claim 1 , wherein said coil comprises a stretched coil having an open pitch at least partially fixed to said external casing.
9. The system of claim 1 , wherein said plurality of illumination fibers each comprise a distal, light emitting tip, wherein a distal end of said coil comprises a seal.
10. The system of claim 9 , wherein said plurality of illumination fibers comprise two light transmitting fibers.
11. The system of claim 10 , wherein said light transmitting fibers are pre-treated with heat to longitudinally shrink said fibers before coupling said fibers with said system.
12. A system comprising:
(a) a handle;
(b) a guide catheter extending distally from the handle, wherein the guide catheter comprises a distal end, wherein the distal end of the guide catheter has a curved configuration; and
(c) an illuminating guidewire within the guide catheter, the guidewire comprises:
(i) a length sufficient to extend from exterior a patient through the patient's nasal cavity and into sinuses of the patient,
(ii) a flexible distal end portion comprising a coil,
(iii) a plurality of illumination fibers extending to and within said distal end portion, wherein said plurality of illumination fibers are configured to emit illuminating light of a character to provide transillumination of light from within the patient's sinuses to provide a glowing region on skin of the patient without causing trauma to tissue, and
(iv) a proximal end portion comprising:
(A) one connecting structure extending from a proximal end of said illuminating guidewire to connect at least one illumination fiber of the plurality of illumination fibers with a power source, and
(B) an external casing enclosing together at least a proximal portion of each of the illumination fibers, wherein a distal end of said connecting structure is fixed to a proximal end of said external casing, wherein a proximal portion of said coil is at least partially fixed to said external casing.
13. A system comprising:
(a) a handle comprising a rotatable grip;
(b) a guide catheter, wherein the rotatable grip is configured to rotate the guide catheter, wherein the guide catheter comprises
(i) a proximal end connected to the handle,
(ii) a distal end comprising a curved open tip, and
(iii) a straight rigid element connecting the proximal end and the distal end; and
(c) an illuminating guidewire within the guide catheter, the illuminating guidewire comprising:
(i) a length sufficient to extend from exterior a patient through the patient's nasal cavity and into sinuses of the patient,
(ii) a flexible distal end portion comprising a coil, and
(iii) a plurality of illumination fibers extending to and within said distal end portion, wherein said plurality of illumination fibers are configured to emit illuminating light of a character to provide transillumination of light from within the patient's sinuses to provide a glowing region on skin of the patient without causing trauma to tissue.