Active clinical trials for "Lacrimal Duct Obstruction"

The purpose of this study is: To report the success proportions of simple probing within different age groups of patients under 24 months of age. To obtain descriptive data regarding symptoms and quality of life in patients receiving simple probing. To obtain similar data for simple probing in patients 24 months of age or older, for intubation in patients age 6 - <48 months, and for balloon catheter dilation in patients age 6 - <48 months.

The purpose of this study is: To report the success proportions for the treatment of persistent nasolacrimal duct obstruction for three surgical procedures: balloon catheter dilation, nasolacrimal intubation, and simple probing. To obtain descriptive data regarding symptoms and quality of life in patients receiving each type of surgical procedure, and to compare success proportions between patients undergoing balloon catheter dilation and those undergoing nasolacrimal intubation.

The aim of the study is to evaluate the risk in intra-operative nasal hemorrhage when using a "pushed" probe (Master Ka) in the treatment of naso lacrimal duct obstruction (NLDO). In the investigator's experience, this risk seemed to minus using a pushed probe rather than the classical pulled-type probes. A lower risk of hemorrhage could lead to a change in the anesthetic procedure. The gold standard in NLDO is the use of an orotracheal intubation. It could then be replaced by the use of an orolaryngeal mask. A forthcoming study will evaluate the results of this anesthetic change.

1.1 Background Obstructions of the lacrimal drainage system can be differentiated based on anatomical location or severity. But also, differentiating between congenital and acquired nasolacrimal duct obstruction (NLDO) is possible. The incidence of congenital NLDO (CNLOD) has been shown to be approximately 20%. Most of the cases undergo spontaneous remission, as the ductus nasolacrimalis may open spontaneously. About 2-12% display a symptomatic course. 2. S: 290; 3; 4, 5 Acquired NLDO may occur during childhood and adulthood. The incidence of symptomatic acquired NLDO is around 30 cases per 100.000 people in an US-based cohort study. S: 293; 30 Two major anatomical closure sites have been described, which are on the one hand located at the between the punctum and canaliculus, and on the other hand located after the lacrimal sac. 1. S. ; 2. S: 293 1.2 Aim of this study The aim of this study is to assess the success rates for different types of primary tear duct surgery, performed from 2013 - 2017 at the department of Ophthalmology and Optometry, Medical University of Vienna. Treatment success was defined as the absence of clinical signs of lacrimal drainage system obstruction (epiphora, increased tear leak, mucous discharge) and without the need for re-intervention. It is further investigated whether the type of operation performed or whether the silicone tube used influence success rates. 1.3 Methods A retrospective chart analysis of all patients - independent of the underlying pathology - undergoing surgery of the lacrimal drainage system between 1st of January 2013 and 31st December 2017. Success rates and patient profiles will be analyzed not only for all patients, but also for subgroups based on the underlying pathology and operation performed.

The purpose of this study was to investigate various potential factors that affected the outcome of treatment of congenital nasolacrimal duct obstruction.

Background Because dacryoliths occur at low frequency, few studies have focused on their composition. The investigators aimed to present findings from morphological, chemical, and mineralogic analysis of 86 dacryoliths. Methods The team studied 86 dacryoliths obtained during 832 dacryocystorhinostomies (DCR) performed for postsaccal obstruction. The samples were analyzed with atomic infrared spectrometry (80 samples), amino acid analysis (17 samples), scanning electron microscopy, and an electron microprobe with an energy dispersive detector (7 samples).

Comparison between patients with nasolacrimal duct obstruction and healthy patients and the influence of their bacterial flora on the corneal epithelium.