{'fraction_non_alphanumeric': 0.0223463687150838, 'fraction_numerical': 0.00558659217877095, 'mean_word_length': 5.234782608695652, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
[Nasolacrimal stent: modifications to Ho-Young Song's technique].

PURPOSE
To introduce modifications to Song's technique in the treatment of nasolacrimal occlusion by means of a polyuretane stent.


MATERIAL AND METHOD
Thirty five polyuretane stents were placed under fluoroscopic guidance in 32 patients diagnosed with total and partial nasolacrimal occlusion.


CONCLUSION
Technical success rate was 90%. Sixteen right and nineteen left nasolacrimal systems were probed. The introduction of a guidewire through the lower punctum, the use of a Ritleng guide, a Crawford hook and ocular protectors are modifications of Song's procedure that may help in successfully performing this technique in a fast and easy way.