Clinical trial · Interventional
Artificial Tears to Prevent Nasolacrimal Duct Obstruction in Patients Treated With Radioactive Iodine for Thyroid Cancer
The Use of Artificial Tears to Prevent Nasolacrimal Duct Obstruction in Patients Who Are Treated With Radioactive Iodine for Thyroid Cancer
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
The association of radioiodine therapy for the treatment of thyroid cancer with nasolacrimal duct obstruction has been well documented in the medical literature. Prior case reports have documented radioactive iodine detection in the tears of patients following radioiodine therapy. It is possible that radioactive uptake by the cells in the lacrimal sac and nasolacrimal duct lead to inflammation, fibrosis, and obstruction of the tear duct over time. A recent study has shown that the administration of artificial tears decreases the level of detectable radioiodine in the tears of patients undergoing radioiodine therapy for thyroid cancer. The purpose of this study will be to assess whether administering tears after radioactive iodine therapy for thyroid cancer decreases the incidence of nasolacrimal duct obstruction in the two years following radioactive iodine treatment.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Nasolacrimal Duct Obstruction | — | UNRESOLVED | — |
| Thyroid Cancer | Malignant Thyroid Gland Neoplasm | CURATED_EXACT | 0.92 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Artificial Tears Methylcellulose | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (2)
- type
- EXPERIMENTAL
- label
- Experimental Arm (Artificial Tears)
- description
- Participants in this arm will receive artificial tears to be administered in the 4 days immediately following radioactive iodine therapy. The schedule of administration will be as follows: Day 1 (day of radioactive iodine therapy): Every 15 minutes for 2 hours, then every 30 minutes for at least 4 hours or until bedtime at night Day 2: Once every 1 hour for 12 hours Day 3: Four times (approximately morning, lunch, dinner, and evening) Day 4: Two times (morning and evening)
- interventionNames
- Drug: Artificial Tears Methylcellulose
- type
- NO_INTERVENTION
- label
- No Intervention (No Artificial Tears)
- description
- Participants in this arm will not administer artificial tears in the 4 days immediately following radioactive iodine therapy.
Primary outcomes (1)
- measure
- Incidence of Post-Radiotherapy Nasolacrimal Duct Obstruction (NLDO)
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: 1. Radio-iodine therapy for thyroid cancer 2. Radioiodine therapy ≥150 mCi 3. Age 18 or older Exclusion Criteria: 1. Use of eye drops, other than artificial tears 2. History of periocular trauma with tear duct involvement/lacrimal gland trauma 3. History of lacrimal drainage disease: canaliculitis, dacryocystitis 4. Prior radiotherapy 5. Current or prior use of chemotherapy drugs (i.e. 5-fluorouracil, docetaxel) 6. Medical conditions that predispose to NLD stenosis (i.e. sarcoidosis, granulomatosis with polyangiitis, chronic lymphocytic leukemia) 7. Nasolacrimal duct obstruction at baseline
References
Publications (0)
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