Related Experiment Video
Updated: Jan 21, 2026

Transcatheter Pulmonary Valve Replacement from Autologous Pericardium with a Self-Expandable Nitinol Stent in an Adult Sheep Model
Published on: June 8, 2022
Primary Probing with and without Monoka Silastic Stent Intubation for Epiphora in Older Children and Adults
1From the Department of Pediatric Ophthalmology and Strabismus, Erciyes University Medical Faculty, Kayseri, Türkiye.
Abstract:
Purpose: To report the results of primary probing with and without monocanalicular silastic stent intubation for the relief of chronic epiphora in older children and adults and to assess its effectivity on final surgical outcome.Materials and methods: An uncontrolled surgical trial was designed. A total of 124 eyes of 102 patients (90 female, 12 male; 80 unilateral, 22 bilateral) with uncomplicated nasolacrimal ductus obstruction had primary probing with and without monocanalicular silastic stent intubation by a Ritleng probe. Symptomatic relief of epiphora and positive dye test were established as success. The time of the operation was measured, the success rate was assessed, the advantages and disadvantages were evaluated and the surgical outcome was compared with our previous papers.Results: The mean age of the patients was 37.2 years (range, 6-59) with a mean follow-up period of 14.7 months (range, 6-24). The symptoms were present for a mean of 2.5 years (range, 6 months-5 years). Of 124 eyes, 21 cases underwent only primary probing whereas the remaining 103 had primary probing with monocanalicular silastic stent intubation. The operative time was 4.3 min (range, 3-12). The silastic stents were removed between third to six months. The overall success rates at the first visit (2 weeks after stent removal) and the last visit were 58.5% and 45.2% (56 cases), respectively. None of the cases demonstrated any per- or postoperative complications. All 68 failure eyes underwent uneventful external dacryocystorhinostomy, 65 (95.5%) of which were successful with the relief of previous symptoms at final visit.Conclusions: Primary probing with or without monocanalicular silastic stent intubation may be tried initially in older children and adults with complete nasolacrimal duct obstructions, as this intervention does not prevent further possible conventional dacryocystorhinostomy in case of failure, speeds up the procedure, and avoids the disadvantages of invasive approaches.
Related Concept Videos
Endotracheal Intubation I: Procedure
The ET tube comprises various components, including a standard adaptor to attach a bag-valve-mask (BVM) or ventilator, a cuff, a pilot balloon, and radiopaque markings along its length to measure the insertion distance. The tube sizes...
Endotracheal Intubation II: Nursing Management
1. Nursing Care of Patients Before Intubation
Before the endotracheal intubation procedure, nurses play an essential role in ensuring the process goes smoothly. The nurses must be familiar with intubation...
Drug Dosing: Infants and Children
Adult Stem Cells
Labeling DNA Probes
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Primary Active Transport

