Background and Objectives: External dacryocystorhinostomy (DCR) is the method of choice to treat nasolacrimal duct (NLD) obstruction and the other approaches are compared with it, with a failure rate of 4% to 13%. The current study aimed to assess the causes of failure in external DCR by postoperative endoscopic and pathological evaluation. <stro...

Objective: Endoscopic endonasal DCR is a well established technique but, there has been considerable debate in the literature about the size of the neo-ostium made during the surgery. Materials: Between September 2005 and February 2008, 22 patients (30 sides) with persistant epiphora and/or chronic dacryocystitis underwent endoscopic DCR. They were 8 males and 14 females aged between 21 and 58 ...

As a provider of Electronic Case Management solutions to knowledgeintensive businesses and organizations, the Danish company Exformatics has in recent years identified a need for flexible process support in the tools that we provide to our customers. We have addressed this need by adapting DCR Graphs, a formal declarative workflow notation developed at the IT University of Copenhagen. Through c...

Objective. To compare pre- and postoperative characteristics and surgical success rates of patients with and without previous episodes of dacryocystitis, who underwent external dacryocystorhinostomy (DCR) for nasolacrimal duct obstruction (NLDO). Methods. The medical files of all patients who underwent external DCR between 2006 and 2011 in our institution were reviewed. The retrieved data of pa...

BACKGROUND To compare the frequency of appearance of complications, anatomical success and functional success after conventional endoscopic dacryocystorhinostomies (EN-DCRs) or EN-DCR with otologic T-Type ventilation tube combined with silicone tube intubation in repeated revision cases. METHODS Twenty-two patients who had epiphora and recurrent dacryocystitis after at least a previous failed...

Let G = (V,E) be a simple graph with |V | = n nodes and |E| = m links, a subset K ⊆ V of terminals, a vector p = (p1, . . . , pm) ∈ [0, 1] and a positive integer d, called diameter. We assume nodes are perfect but links fail stochastically and independently, with probabilities qi = 1 − pi. The diameter-constrained reliability (DCR for short), is the probability that the terminals of the resulti...