Patent · US Expired

Intubation of lacrimal ducts

US4380239A · kind A · utility

20Cited by

5References

8Claims

0Family size

Assignee

The Hospital for Sick Children · CA

Inventors

John Stuart Crawford · Lexington, US
Roy Wainman · Toronto, CA

Key dates

Filing date	Oct 7, 1981
Grant date	Apr 19, 1983
Priority date	—
Expiry date	Oct 7, 2001

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F9/00772
WIPO fieldMedical technology
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.