Does Topical Ophthalmic Proparacaine 0.5% Prior to Probing and Irrigation Decrease Pain?

Epiphora Clinical Trial

Official title:

Does Administration of Proparacaine Hydrochloride 0.5% Ophthalmic Solution Prior to Canalicular Probing and Irrigation Decrease Patient Discomfort?

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05663684
• Other study ID #: LSU1351
• Status: Recruiting
• Phase: Phase 4
• Start date: June 30, 2020
• Est. completion date: January 31, 2023

Study information

• Verified date: December 2022
• Source: Louisiana State University Health Sciences Center in New Orleans
• Contact: Austin M Pharo, MD
• Phone: (504) 568-3156
• Email: apharo[@]lsuhsc.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Purpose: It is unknown whether instillation of a drop of anesthetic ophthalmic solution into the eye such as proparacaine hydrochloride 0.5% prior to probing and irrigation of the tear duct (lacrimal drainage) system improves participant comfort during the procedure. To date, there have been no formal studies evaluating the possible benefit of this pretreatment.

Methods: Participants 18 years and older who present to the Louisiana State University or associated outpatient ophthalmology clinic(s) with a complaint of epiphora (excessive tearing) who necessitate bilateral lower lid probing and irrigation of the lacrimal drainage system will be enrolled in the study. One eye will be randomized to receive a drop of the anesthetic Proparacaine hydrochloride 0.5% and the other eye will receive a control drop of Balanced Salt Solution (BSS). Probing and irrigation will then be performed in the usual fashion. The participant will then be questioned via survey on a pain scale of 1-5 as to the amount of subjective pain experienced on each side during the procedure.

Expected Results: Investigators expect participants will experience statistically significantly less pain in eyes that have received a drop of Proparacaine hydrochloride 0.5% prior to performance of probing and irrigation compared to the eyes which have received the control drop.

Description:

Rationale: It is common for male and female adults of all races with a chief complaint of epiphora (excessive tearing) to express discomfort either verbally or through body language while undergoing tear duct (canalicular) probing and irrigation even when no pathology is detected. Use of a topical anesthetic during canalicular probing and irrigation is seen in children but has yet to be formally investigated in adults to date. The goal of this study is to identify whether or not instillation of a drop of Proparacaine hydrochloride 0.5% ophthalmic solution into a participant's eye prior to performance of probing and irrigation will improve participant comfort during the procedure and is therefore recommended.

Hypothesis: Administration of a drop of Proparacaine hydrochloride 0.5% ophthalmic solution into the eye prior to probing and irrigation of the lower lid canalicular system will decrease discomfort as compared to a control drop of BSS ophthalmic solution into the opposite eye prior to the same procedure.

Null hypothesis: Administration of a drop of Proparacaine hydrochloride 0.5% ophthalmic solution does not have an effect on discomfort during canalicular probing and irrigation.

Medication: Proparacaine hydrochloride ophthalmic solution, United States Pharmacopeia (USP) 0.5% is a local anesthetic drug intended for topical ophthalmic use. Proparacaine Hydrochloride ophthalmic solution is a fast-acting anesthetic lasting 10-20 minutes. Proparacaine hydrochloride ophthalmic solution, USP 0.5% is FDA approved for this indication.

Probing and irrigation: A common in-office ophthalmic procedure performed with a small gauge, blunt tube on a syringe filled with BSS. The cannula is placed into the canaliculus (tear duct) of one eyelid, and the BSS is used to irrigate the lacrimal system. This procedure identifies whether or not obstruction of the lacrimal system is present. A participant with an open (patent) system will taste the salty BSS solution in the nose. A participant with a nasolacrimal duct obstruction (NLDO) or a more proximal canalicular obstruction will have reflux of the irrigant out of the opposite lid (on the same side) canaliculus, the probed canaliculus, or both and will usually not detect any irrigant within the nasopharynx.

Definitions:

Nasolacrimal drainage system: The physiologic apparatus which drains tears from the surface of the eye into the nose (i.e. the tear drain). It consists of (from eye to nose) the punctum (opening of the tube), the canaliculus (a thin tube within the eyelid), the lacrimal sac (a sac that hold the tears that lies within the bone of the nose) and finally the nasolacrimal duct (a duct that connects the lacrimal sac (-lacrimal) into the nose (naso-). A blockage anywhere along this pathway can cause epiphora.

Epiphora: The pathological process of tears overflowing from the ocular surface and rolling down the face. Commonly caused by obstructions of the lacrimal drainage system. Can cause significant irritation and loss of visio

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 145
• Est. completion date: January 31, 2023
• Est. primary completion date: December 30, 2022
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Participants of any sex aged 18 years or older

• Signs and symptoms of epiphora which necessitate performance of a diagnostic probing and irrigation of the bilateral lower eyelid lacrimal drainage system at Louisiana State University Health Sciences Center or any of the listed physician offices who present with a complaint of epiphora from either eye

Exclusion Criteria:

• A known allergy to topical proparacaine hydrochloride

• Known pre-existing scarring, surgery, radiation to the nasolacrimal system

• Presence of blockage and or reflux on probing and irrigation of either side

• Cognitive Impairment

Related Conditions & MeSH terms

• Dacryocystitis
• Dacryostenosis
• Epiphora
• Lacrimal Apparatus Diseases

Intervention

Drug:
• Proparacaine Hydrochloride ophthalmic solution, USP 0.5%
One drop instilled in one eye, randomly chosen, as topical anesthetic
• Balanced salt solution
One drop instilled in one eye, randomly chosen, as control placebo

Locations

Country	Name	City	State
United States	Louisiana State University Health Sciences Center	New Orleans	Louisiana

Sponsors (1)

Lead Sponsor	Collaborator
Louisiana State University Health Sciences Center in New Orleans

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Association between reduction of pain/discomfort and anesthetic use	Count of participants who have concordance between instillation of anesthetic and report of less discomfort in that eye during probing	1 minute