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Related Concept Videos

Endoscopic Procedures V: ERCP01:26

Endoscopic Procedures V: ERCP

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a diagnostic procedure that combines endoscopy and fluoroscopy to diagnose and treat conditions related to the bile ducts, pancreatic ducts, and gallbladder. This procedure is beneficial for identifying and addressing blockages, gallstones, strictures, and tumors within the biliary or pancreatic systems. ERCP is both diagnostic and therapeutic, offering the ability to visualize and treat identified problems in one session.
Patient...
Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
During an EGD, the endoscope can be used to:

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Related Experiment Video

Updated: May 25, 2026

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
07:30

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction

Published on: October 13, 2017

Improving Results in Endoscopic DCR.

Nishi Gupta1

  • 1Department of ENT, Dr. Shroff's Charity Eye Hospital, Daryaganj, New Delhi, 110002 India.

Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India
|February 10, 2012
PubMed
Summary

Understanding factors causing failure in endoscopic dacryocystorhinostomy (DCR) surgery is key to improving success rates. This study analyzed 60 revision DCR cases, identifying common reasons for primary surgery failure.

Keywords:
Dacryocystorhinostomy (DCR)EndoscopicNasolacrimal duct (NLD)Regurgitation of pus on pressure over lacrimal sac (ROPLAS)

Related Experiment Videos

Last Updated: May 25, 2026

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
07:30

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction

Published on: October 13, 2017

Area of Science:

  • Ophthalmology
  • Otorhinolaryngology
  • Surgical Outcomes

Background:

  • Endoscopic dacryocystorhinostomy (DCR) is a common procedure for nasolacrimal duct obstruction.
  • Revision surgeries are often necessary due to primary procedure failures.
  • Identifying failure factors is crucial for improving surgical techniques and patient outcomes.

Purpose of the Study:

  • To analyze the primary causes of failure in endoscopic dacryocystorhinostomy (DCR) surgery.
  • To provide insights for enhancing the success rate of DCR procedures.
  • To identify specific surgical and anatomical factors contributing to DCR failure.

Main Methods:

  • Retrospective analysis of 60 revision endoscopic DCR cases over a 10-year period (1998-2008).
  • Clinical assessment including examination of eyes, lids, and medial canthal area for deformities, watering, or discharge.
  • Diagnostic tests such as ROPLAS test, probing, and syringing to identify nasolacrimal duct (NLD) blockages.
  • Surgical revision of failed cases with detailed analysis of contributing factors.

Main Results:

  • Inadequate sac opening (38.3%) and low rhinostomy (28.3%) were the most frequent causes of DCR failure.
  • Other significant factors included rhinostomy site contracture (10%), improper case selection (3.3%), laser burn canalicular scarring (3.3%), and lid laxity/atonic sac (3.3%).
  • Common underlying issues included incorrect sac localization, insufficient sac wall removal, excessive mucosal removal leading to adhesions, and failure to identify additional NLD blocks.

Conclusions:

  • Inadequate sac opening and low rhinostomy are primary surgical technical issues leading to DCR failure.
  • Careful case selection, precise surgical technique, and thorough assessment for complete NLD blockage are essential for successful DCR.
  • Addressing these identified factors can significantly improve the outcomes of endoscopic DCR surgery.