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Related Experiment Videos

Dacryocystostenting: technical and long-term results.

P Falappa1, M Ortenzi, F Passarelli

  • 1UO Angiografia e Radiologia Interventistica, Ospedale Pediatrico Bambin Gesb, 1-00165 Roma, Italy. falappa@opbg.net

La Radiologia Medica
|April 21, 2006
PubMed
Summary
This summary is machine-generated.

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Polyurethane stents for nasolacrimal duct obstruction showed poor long-term patency (86.9% obstruction after 4 years). This highlights the need for improved biocompatible materials or removal strategies for chronic epiphora treatment.

Area of Science:

  • Ophthalmology
  • Otorhinolaryngology
  • Biomaterials Science

Background:

  • Chronic inflammation and obstruction of the nasolacrimal system cause epiphora (excessive tearing).
  • Endonasal stenting is a potential treatment, but long-term efficacy requires evaluation.

Purpose of the Study:

  • To assess the long-term patency of polyurethane stents placed in the nasolacrimal duct for epiphora.
  • To evaluate the safety, simplicity, and reproducibility of this endonasal stenting technique.

Main Methods:

  • Fifty-seven polyurethane stents were inserted using Song's technique between July 1998 and May 2001.
  • Procedures involved mild sedation and local anesthesia.
  • Twenty-three stents were assessed 24-48 months post-placement.

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Main Results:

  • After 4 years, 86.9% (20/23) of the stents were found to be obstructed.
  • Histological analysis of removed stents revealed occlusion by granulation tissue (8 cases), necrotic material (4 cases), and fibrosis (3 cases).

Conclusions:

  • While the polyurethane stent procedure is safe, simple, and reproducible, its long-term efficacy for treating epiphora is poor.
  • Further research is needed for improved strategies, including programmed stent removal or development of more biocompatible materials.