A Comparative Study of Two Endoscopic Operations for Lacrimal Duct Obstruction


To compare the clinical effects between the silicone nasolacrimal intubation under nasoendoscopy and dacryocystorhinostomy on patients with lacrimal duct obstruction.

Full Title of Study: “A Comparative Study of Recessive Spherical Headed Silicone Intubation and Dacryocystorhinostomy Under Nasal Endoscopy in the Treatment of Nasolacrimal Duct Obstruction”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Single (Participant)
  • Study Primary Completion Date: January 2017

Detailed Description

Lacrimal duct obstruction is common among patients with epiphora,which is seriously affect the quality of life. The treatment principle is to restore or rebuild the lacrimal duct drainage channel. The classic operation type is dacryocystorhinostomy(DCR), which is complex for face-section particularly. However, with the development of endoscopy, the investigators prefer to the silicone nasolacrimal intubation under nasal endoscopy, which is more simple and efficient. With endoscopy, the investigators can see anatomical structures clearly and then can perform the operation much more perfectly.Compare to the classic one called DCR, its short and long term therapeutic effects are equal and even better.Therefore,the latter type does do good to both doctors and patients.


  • Procedure: Recessive Spherical Headed Silicone Intubation
    • Local anesthesia,regular disinfection, spread sterile towels, exposure operative side.2%lidocaine infiltration anesthesia to inferior orbital nerves, lacrimal punctum and lacrimal sac. Nasal cavity was packed with gauze soaked in 2%ephedrine with 1%tetracaine 15 minutes before procedure.A routine silicone tube of spherical intubation was performed. Dilatated lacrimal point to the end, then inserted the probe with line from lacrimal punctum to inferior meatus through nasolacrimal duct.Cut the line and flush the lacrimal duct physiological saline in 5 mL, flowing the line into the inferior meatus, then suctioned out the line with nasal endoscopy and extracted the probe and dilatated the lacrimal duct again. Insert the spherical silicone tube from lacrimal point to the lacrimal sac, reversing to vertical direction to ensure the tube is inserted into the nasolacrimal duct, then catch the above line but cut short the follow one and fix.Unobstructed lacrimal irrigation.
  • Procedure: Dacryocystorhinostomy
    • Surgery was performed under local anesthesia.Incision was taken over anterior lacrimal crest.Medial palpebral ligament was identified.Orbicularis was separated.Reflection of periosteum and dissection of lacrimal sac from lacrimal fossa was done.Sac was excised to make’H’shaped anterior and posterior flaps. Bony osteum of sufficient size was made with bone punch.Nasal mucosa was cut to make anterior and posterior flaps.Subsequently anterior to anterior and posterior to posterior flaps were sutured.

Arms, Groups and Cohorts

  • Experimental: Recessive Spherical Headed Silicone Intubation
    • The silicone nasolacrimal intubation under nasal endoscopy can restore natural drainage pathway in tears and as an out-patient surgery, it is more simple,cheap and mini-invasive.Recessive Spherical Headed Silicone Intubation is safe,convenient and almost unpainful for no trauma.It has no facial scar and no damage for structure and function of lacrimal duct.Besides,silica gel is non-toxic and nonirritating.Nasal endoscopy handed by otorhinolaryngologist helps intraoperative visualization about anatomy of the nasal cavity,understanding and management of congenital nasolacrimal duct obstruction and is the only method that confirms the correct anatomic position of the catheterization and in real time,avoiding traditionally the blind raking-out wire by the ophthalmologist alone.Compare to the classic DCR,its short therapeutic effects are equal but more convenient and fewer time and money-cost.
  • Other: Dacryocystorhinostomy
    • Nasolacrimal duct obstruction is common among patients with epiphora,which is seriously affect the quality of life. The treatment principle is to restore or rebuild the lacrimal duct drainage channel. The classic operation type is dacryocystorhinostomy(DCR), which is complex for face-section particularly.After surgery the lacrimal passage can’t siphon the tear out physically any more so that it will effect the patients’ life.Besides,the operating time,bleeding volume,hospitalization time and total cost for the surgery is higher.

Clinical Trial Outcome Measures

Primary Measures

  • Epiphora Improvement
    • Time Frame: one-year follow-up
    • Cure:postoperative epiphora disappeared. Effective:clinical symptom remission. Invalid:no effect on epiphora.
  • Lacrimal Passage Irrigation
    • Time Frame: one-year follow-up
    • Cure:no reflux after lacrimal passage irrigation. Effective:a little reflux after lacrimal passage irrigation. Invalid:a lot reflux after lacrimal passage irrigation.

Secondary Measures

  • Postoperative Visual Analogue Scale (VAS)
    • Time Frame: Six times in one-year follow-up,respectively,immediate post-surgical,the 1th week,the 1th month,the 3rd month,the 6th month and the 12th month after the surgery.
    • From 0 to 10 according to the patients’ feeling and life quality

Participating in This Clinical Trial

Inclusion Criteria

  • Clinical diagnosis of Nasolacrimal Duct Obstruction based on a clinical of epiphora and purulent secretion, another punctiform orifices with reflux in subsequent flushing in lacrimal passage irrigation; – Must be able to withstand surgery – At least 18 years old – NO lacrimal tumor and acute inflammation – Nasolacrimal duct obstruction in digital subtraction dacryocystography – A sufficient level of education to understand study procedures and be able to communicate with site personnel and adhere to the follow-up; – Accepted informed consent verbally and in writing Exclusion Criteria:

  • The Poor Health – Be allergic to anesthetics – Lacrimal duct abnormalities – Lacrimal tumor and acute inflammation – Children – The same Surgery failure before Exit Criteria – Postoperative infection and persistent inflammation – Operation failure.

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Third Affiliated Hospital, Sun Yat-Sen University
  • Provider of Information About this Clinical Study
    • Principal Investigator: Deng Huiyi, postgraduate – Third Affiliated Hospital, Sun Yat-Sen University
  • Overall Official(s)
    • Yang Qintai, director, Study Director, Sun Yat Sen Univ, Affiliated Hosp 3, Dept Otorhinolaryngol Head & Neck Surg, Guangzhou 510630, Guangdong, Peoples R China.


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Onerci M, Orhan M, Ogretmeno─člu O, Irke├ž M. Long-term results and reasons for failure of intranasal endoscopic dacryocystorhinostomy. Acta Otolaryngol. 2000 Mar;120(2):319-22.

Wormald PJ. Powered endoscopic dacryocystorhinostomy. Laryngoscope. 2002 Jan;112(1):69-72.

Saroj G, Rashmi G. Conventional dacryocystorhinostomy versus endonasal dacryocystorhinostomy-a comparative study. Indian J Otolaryngol Head Neck Surg. 2010 Sep;62(3):296-8. doi: 10.1007/s12070-010-0087-4. Epub 2010 Oct 12.

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