Nasolacrimal duct probing in infants

Area of Science:

• Ophthalmology
• Otorhinolaryngology

Background:

• Lacrimal duct probing is a common procedure for nasolacrimal duct obstruction.
• Clinical success of probing can be difficult to ascertain, leading to unexplained treatment failures.

Purpose of the Study:

• To investigate the incidence of false passages during lacrimal duct probing using fiberoptic endoscopy.
• To correlate endoscopic findings with dacryocystofluoroscopy results.
• To elucidate the mechanism behind clinical probing failures.

Main Methods:

• Fiberoptic endoscopy was used to visualize the inferior turbinate vault during probing and irrigation.
• Dacryocystofluoroscopy was performed to confirm the presence of false passages.
• Clinical outcomes of patients with "metal on metal" sensation during probing were analyzed.

Main Results:

• A high incidence of false passages was observed during fiberoptic endoscopic visualization.
• Dacryocystofluoroscopy confirmed the creation of these false passages.
• The presence of false passages provides a potential explanation for clinical probing failures.

Conclusions:

• Fiberoptic endoscopy is a valuable tool for identifying false passages during lacrimal duct probing.
• The creation of false passages may explain why some lacrimal duct probings, despite a "metal on metal" sensation, ultimately fail.
• This finding has implications for understanding and improving the success rates of lacrimal duct probing procedures.