[Anatomical structure and morphometric parameters of the distal segment of the lacrimal drainage system].

The article analyzes the literature data concerning the anatomical structure of the tear ducts with a focus on morphometric studies of individual structures. It is noted that, despite the high information content of cadaveric studies, most of the information to date has been obtained with the use of intravital radiation visualization methods. It is shown that the lacrimal drainage system has age, gender, and racial characteristics.

Dynamic viscosity of the wall of the lacrimal sac in disorders of the patency of the lacrimal ducts.

Purpose: To assess the dynamic viscosity of the lacrimal sac wall in patients with various origins of lacrimal duct obstruction.

Methods: The study was performed in 35 cases: 21 cases with primary nasolacrimal duct obstruction (PANDO) and 14 cases with secondary nasolacrimal duct obstruction after radioiodine therapy (SALDO). The study of biomechanical properties of the lacrimal sac was carried out using a test bench.

[Biometric characteristics of the lacrimal passages in healthy individuals and in patients with nasolacrimal duct obstruction].

Unlabelled: Despite an obvious interest in the processes occurring in the lacrimal passages in their obstruction, there is few articles analyzing their biometric parameters.

Purpose: The study investigates the biometric characteristics of the lacrimal passages in healthy individuals and in patients with nasolacrimal duct obstruction.

Material And Methods: The study included 81 cases of partial nasolacrimal duct obstruction and 38 cases without tear drainage insufficiency.

Morphological Characteristics of the Lacrimal Apparatus in its Obstruction of Various Genesis.

Secondary acquired lacrimal duct obstruction (SALDO) is one of the complications of radioiodine therapy. The material was obtained during endoscopic dacryocystorhinostomy with revision of Hasner's valve in patients with PANDO (n = 7) in the distal segments of the nasolacrimal duct and in patients with SALDO (n = 7) after radioactive iodine therapy. The material was stained with hemotoxylin and eosin, alcyan blue, and by Masson method.

Topographic and anatomical features of the nasolacrimal duct obstruction due to radioiodine treatment.

Purpose: To investigate the topographic and anatomical features of secondary acquired nasolacrimal duct obstruction (SALDO) due to radioiodine therapy.

Methods: Dacryocystography-computed tomography (DCG-CT) scans of the nasolacrimal ducts in 64 cases with SALDO due to radioiodine therapy and in 69 cases with primary acquired nasolacrimal duct obstruction (PANDO) were studied. The anatomical site of obstruction was located, and morphometric characteristics of the nasolacrimal ducts were calculated: volume, length, and average sectional area.