Related Experiment Video
Updated: Jun 24, 2026
07:30
Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
Published on: October 13, 2017
Normalization of conjunctival flora after dacryocystorhinostomy
Naser Owji1, Mohammad R Khalili
1Department of Ophthalmology, Khallili Hospital, Shiraz University of Medical Sciences, Shiraz, Iran. owjin@sums.ac.ir
Ophthalmic Plastic and Reconstructive Surgery
|March 21, 2009
Summary
Conjunctival flora typically normalizes within a few weeks after dacryocystorhinostomy. Factors like bacterial type, colony count, and silicone tube use influence this normalization time.
Area of Science:
- Ophthalmology
- Microbiology
Background:
- Nasolacrimal duct obstruction and chronic dacryocystitis often require dacryocystorhinostomy.
- Conjunctival flora alterations can occur post-surgery.
Purpose of the Study:
- To determine the time required for conjunctival flora normalization following dacryocystorhinostomy.
- To identify factors influencing the rate of conjunctival flora normalization.
Main Methods:
- Prospective study of 40 adult patients undergoing dacryocystorhinostomy.
- Preoperative and postoperative conjunctival cultures were performed.
- Cultures assessed weekly post-surgery until normalization criteria were met.
Main Results:
- Mean normalization time was 4.5 weeks.
- Normalization time correlated significantly with bacterial type (p=0.04) and colony count (p<0.001).
- Patients with silicone tubes had a longer mean normalization time (6.2 weeks) compared to those without (3.9 weeks).
Conclusions:
- Conjunctival flora requires several weeks to normalize post-dacryocystorhinostomy.
- Bacterial characteristics, initial colony count, and the use of silicone tubes are significant factors affecting normalization.
Related Concept Videos
01:22Microbiome of the Eye
The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
01:29Suctioning the Nasopharyngeal Airway
Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
Equipment Required
Equipment Required
01:21Tracheostomy Decannulation
Tracheostomy decannulation is a significant milestone in the liberation of mechanically ventilated patients. Despite its importance, there is no universally accepted protocol for this procedure. This demands an evidence-based, individualized approach.
Description of the Procedure
Decannulation refers to the permanent removal of the tracheostomy tube, signaling the resolution of the condition that initially necessitated the tracheostomy. The process requires a well-coordinated interplay between...
Description of the Procedure
Decannulation refers to the permanent removal of the tracheostomy tube, signaling the resolution of the condition that initially necessitated the tracheostomy. The process requires a well-coordinated interplay between...