Morphological and morphometrical study of the nasal opening of nasolacrimal duct in man.
نویسنده
چکیده
BACKGROUND Epiphora constitutes one of the major and very common problems in all age groups. Recent developments in ophthalmology such as balloon dilatation, stent implantation, laser therapy and endoscopy of the lacrimal drainage system raise the need for a detailed anatomical knowledge of this system. It is also important for formulation of principles and techniques in the management of acrimal problems. The aim of this study was to demonstrate variations in shape, size and location of the opening of the nasolacrimal duct and of the lacrimal fold. MATERIALS AND METHODS Twenty sagittal head sections were obtained, the nasal septum was removed and the lateral wall of the nasal cavity was exposed and examined. The opening of the nasolacrimal duct (NLD) was demonstrated and was subjected to anatomical observations for the shape, site, size, opening type and the presence of the lacrimal fold. The different measurements for the distances between the opening of NLD and anterior nasal spine, palate and inferior concha were made. RESULTS The examined specimens showed that the opening of the NLD was variable in shape taking the form of sulcus in 70% and fissure in 30% of specimens. The sulcus was either vertical or oblique while the fissure was either vertical, oblique or in the form of anteroposterior one. Regarding the location, the opening of the NLD was located at anterior one third below line of attachment of the inferiorconcha in nearly half of cases (45%). The lacrimal fold was present in most of examined specimens (70%) and absent in 30%. The fold take 5 different forms. CONCLUSIONS The knowledge of the morphology and morphometry of the lacrimal drainage system enables the ophthalmologist to plan intervention on the lacrimal drainage system precisely and avoid unnecessary manipulations and also minimizing the risk of injury during intra-nasal surgery.
منابع مشابه
Lacrimal Apparatus System in One-Humped Camel of Iran (Camelus Dromedarius): Anatomical and Radio-Logical Study
Objective- Radiological and anatomical study of the Lacrimal apparatus system in one-humped camel of Iran (Camelus Dromedarius).Design- Prospective studyAnimals- Five heads (cut above the third cervical vertebra) of adult Dromedary camels' cadavers were collected from the slaughterhouse of the Najafabad area of Isfahan Province, Iran. Procedures- The anatomy of the nasolacrimal duct of one- hum...
متن کاملAssessment of the Relationship between Primary Nasolacrimal Duct Obstruction and Nasal Mucosal Goblet Cells
Background and Objectives: Primary acquired nasolacrimal duct obstruction (PANDO) is a common ocular problem. Clinical presentation can range from simple tearing to a life-threatening condition. The exact pathophysiology of obstruction is not completely understood. In this study, therelationship between PANDO and nasal mucosal goblet cells was investigated. Materials & Methods: In this case-c...
متن کاملEvaluation of lacrimal drainage system by radionuclide dacryoscintigraphy in patients with epiphora
Introduction: This study was done to determine the site of obstruction in lacrimal drainage system in Asian patients suffering from epiphora and to determine the transit time taken for the tracer material to reach the lacrimal sac and the nasal cavity. Methods:Dacryoscintigraphy was performed using radionuclide technetium-99m pertechnetate (99m...
متن کاملAnatomic study of the lacrimal fossa and lacrimal pathway for bypass surgery with autogenous tissue grafting
PURPOSE To study the microsurgical anatomy of the lacrimal drainage system and to provide anatomical evidence for transnasal endoscopic lacrimal drainage system bypass surgery by autogenous tissue grafting. MATERIALS AND METHODS A total of 20 Chinese adult cadaveric heads in 10% formaldehyde, comprising 40 lacrimal ducts were used. The middle third section of the specimens were examined for t...
متن کاملDacryocystitis and Canaliculitis
The lacrimal drainage system consists of the puncta (upper and lower within the eyelids) which are the opening to the upper and lower canaliculus. These meet at the common canaliculus and open into the lacrimal (tear) sac. This runs parallel to the nose and is separated from the middle meatus of the nasal cavity by two thin plates of bone. It continues down to become the nasolacrimal duct (tear...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Folia morphologica
دوره 73 3 شماره
صفحات -
تاریخ انتشار 2014