Intubation of lacrimal ducts
AssigneeThe Hospital for Sick Children
InventorsJohn S. Crawford, Roy Wainman
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Abstract
The invention provides a probe set for use particularly in the canaliculus intubation of the lacrimal duct, the probe set comprising: a probe of a light wire which can be readily deflected through an angle of at least 90 degrees to permit the probe to pass from the nasolacrimal duct to the inferior meatus, the probe having an enlarged end portion which is rounded to limit the possibility of damage to tissue when the probe is inserted; and a very flexible tube of minimal rigidity having a first end attached to an end of the probe remote from the end portion and having an outside diameter comparable to that of the end portion so that in use the probe can be inserted and used to draw the tube into the lacrimal duct.
Claims8
A probe set for use in the canaliculus intubation of the lacrimal duct, the probe set comprising:
- a probe of a light wire which can be readily deflected through an angle of at least 90 degrees to permit the probe to pass from the nasolacrimal duct to the nasal inferior meatus, the probe having an enlarged end portion which is rounded to limit the possibility of damage to tissue when the probe is inserted;
- and
- a very flexible tube of minimal rigidity having a first end containing an end of the probe remote from the end portion and having an outside diameter comparable to that of the end portion so that in use as the probe is inserted the enlarged end portion minimises damage to tissue and can be used to pull this end from the nasal passage to thereby draw the tube into the lacrimal duct.
A method of canaliculus intubation of the lacrimal duct comprising the steps:
- providing a probe of light wire which can be deflected readily as it emerges from the lacrimal duct into the nasal inferior meatus, the probe having an enlarged end portion which is rounded to limit the possibility of damage to tissue when the probe is inserted, and a very flexible tube of minimal rigidity engaged over an end of the probe remote from the enlarged end portion and having an outside diameter comparable to that of enlarged end portion;
- inserting the enlarged end portion to the lacrimal duct at the eye and moving this end portion downwardly through the duct into the nasal inferior meatus until the enlarged end portion meets the floor of the nasal cavity;
- providing a tool having a hook portion defining a recess proportioned to receive the light wire and to prevent passage of the enlarged end portion through the recess;
- engaging the tool in the nasal cavity to contact the light wire and, manipulating the tool so that the light wire is contained in the recess;
- gently drawing the tool outwardly bringing with it said end portion so that the light wire curves freely from the lacrimal duct into the inferior meatus out of said nasal passage, said probe being drawn outwardly until the tube is positioned in the lacrimal duct;
- severing excess end portions of the tube to leave the required part of the tube in the lacrimal duct.
Dependencies are inferred from the claim text.