J Korean Radiol Soc.
1997 Jul;37(1):59-62.
Invention of a Nasolacrimal Stent Retrieval Hook
- Affiliations
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- 1Department of Biomedical Engineering, Asan Medical Center, University of Ulsan College of Medicine.
- 2Department of Diagnostic Radiology, Asan Medical Center, University of Ulsan College of Medicine.
Abstract
- PURPOSE
To evaluate the clinical usefulness of a nasolacrimal stent retrieval hook.
MATERIALS AND METHODS
The retrieval hook consisted of two parts, a hook and pusher. The head of the hook part was made of 0.7 mm stainless steel wire and was question mark-spaped, while the body of this part was constructed by soldering together four stainless steel pipes ranging in thickness from 1.25 to 3.5 mm, serially. The pusher part was made of two plastic tubes and was designed in such a way that the hook grasped the stent tightly. The device was used to remove 46 stents in 40 patients, and tested for 1) average number of trials ; 2) success rate; and 3) average time of the procedure.
RESULTS
The average number of trials, success rate, and average time taken to remove the stent was 4.7, 91%, and 1.8 minutes, respectively.
CONCLUSION
In the removal of nasolacrimal stents, the retrieval hook was easy to use, useful and effective.
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