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BMC Ophthalmol ; 22(1): 500, 2022 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-36539768


BACKGROUND: The middle turbinate axilla (MTA) has always been used as a stable anatomic landmark for endoscopic surgeons to locate the lacrimal sac on the lateral nasal wall. Yet, little is known about whether the lacrimal sac size will affect the positioning effect of MTA on lacrimal sac. The aim of this study was to investigate the regularity of lacrimal sac size and lacrimal sac localization through the reference position of the MTA on computed tomographic dacryocystography (CT-DCG) images. METHODS: A series of 192 endoscopic dacryocystorhinostomy (DCR) surgeries were performed. All the patients had been diagnosed as unilateral nasolacrimal duct obstruction and received CT-DCG examinations. According to the maximum transverse diameter of the lacrimal sac on CT-DCG, the patients were classified into three groups. Measurements were taken on CT-DCG parasagittal images. RESULTS: The average distance from the sac superior fundus (SSF) to the MTA was 7.52 mm ± 3.23 mm, and it increased with the increase of the maximum transverse diameter of the sac among groups (p < 0.01). The average distance from the common canaliculus (CC) to the MTA was 3.95 mm ± 2.49 mm. No significant difference was observed among the groups (p = 0.11). The average distance from the CC to the SSF was 3.41 mm ± 1.31 mm, and it increased with the increase of the sac transverse diameter among groups (p < 0.01). CONCLUSIONS: The lacrimal sac can be accurately located on the lateral nasal wall by the reference position of the MTA on CT-DCG images. The distance of the SSF to the MTA and the SSF to the CC is related to the lacrimal sac size. The relative position of the CC to the MTA is relatively stable on CT-DCG images, which make it possible to locate the lacrimal sac of different sizes and the corresponding nasal mucosa incision design in endoscopic DCR.

Dacriocistorinostomia , Aparelho Lacrimal , Obstrução dos Ductos Lacrimais , Ducto Nasolacrimal , Humanos , Ducto Nasolacrimal/diagnóstico por imagem , Ducto Nasolacrimal/cirurgia , Obstrução dos Ductos Lacrimais/diagnóstico por imagem , Conchas Nasais/diagnóstico por imagem , Conchas Nasais/cirurgia , Dacriocistografia , Axila , Valores de Referência , Dacriocistorinostomia/métodos , Tomografia Computadorizada por Raios X
Nucl Med Rev Cent East Eur ; 25(1): 12-17, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35137932


BACKGROUND: This diagnostic study aimed to assess degree of agreement between dacryoscintigraphy and dacryocystography as supporting examinations in patients with primary acquired nasolacrimal duct obstruction (PANDO). Patients with PANDO who complained of epiphora and visited our outpatient clinic were subsequently sent for dacryoscintigraphy and dacryocystography examinations. Side effects and convenience of both examinations were assessed by observation and questionnaire. MATERIAL AND METHODS: Through irrigation and probing, there were 47 out of 62 eyes were found with PANDO. As much as 87.1% subjects were female, with mostly (74.2%) aged > 40 years old. With dacryoscintigraphy, time needed to reach sac was 0 minutes, 5 minutes (duct), and 12.5 minutes (nasal cavity). RESULTS: Degree of agreement between both examinations was 83.8% to determine obstruction and 70.9% to locate obstruction. There were 22 subjects complained about pain in dacryocystography examination while none with dacryoscintigraphy (p < 0.005). Sixteen subjects feel dacryoscintigraphy examination was more convenient, eleven subjects feel dacryocystohraphy was more convenient, while 4 subjects feel the two examinations were similar. CONCLUSIONS: Even though dacryocystography examination was considered more painful than dacryoscintigraphy, both examinations had high convenience level for patients. Dacryoscintigraphy and dacryocystography also had a good agreement in detecting and locating obstruction in PANDO.

Obstrução dos Ductos Lacrimais , Ducto Nasolacrimal , Adulto , Dacriocistografia , Feminino , Humanos , Obstrução dos Ductos Lacrimais/diagnóstico por imagem , Ducto Nasolacrimal/diagnóstico por imagem , Cintilografia
Vet Ophthalmol ; 25 Suppl 1: 25-36, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35226782


OBJECTIVE: This study sought to describe the anatomical characteristics of the nasolacrimal duct of Persian cats as observed by computed tomographic dacryocystography. ANIMAL STUDIED: Ten cats weighing 3-6 kg (three live cats and seven cadaveric specimens). PROCEDURES: The animals were submitted to bilateral computed tomographic dacryocystography, totaling 20 nasolacrimal ducts. Dorsal, sagittal, and transverse planes were studied. Two additional skulls were also dissected following latex injection into the nasolacrimal duct. The length and width of the nasolacrimal duct and lacrimal canaliculi, and the distance between the nasolacrimal duct and the root of the upper canine tooth at the point of closest proximity were measured. RESULTS: The nasolacrimal duct followed a convoluted course, particularly in the middle and rostral portions. Duct stenosis (width reduction equal to or >75%) and dilations (width increase equal to or >50%) were also detected, particularly in the rostral portion. Nasolacrimal duct length and width ranged from 1.3 to 1.5 cm and 1.5 to 2.3 mm, respectively. Mean lacrimal canaliculus length and width corresponded to 3.1 mm and 0.4 mm, respectively. Mean distance from the nasolacrimal duct to the canine tooth was 2.4 mm. The root of this tooth interfered with the course of the nasolacrimal duct. CONCLUSION: This study provided anatomical information for clinical assessment of the nasolacrimal drainage system in Persian cats.

Doenças do Gato , Aparelho Lacrimal , Obstrução dos Ductos Lacrimais , Ducto Nasolacrimal , Animais , Doenças do Gato/diagnóstico por imagem , Gatos , Dacriocistografia , Pálpebras , Humanos , Aparelho Lacrimal/diagnóstico por imagem , Obstrução dos Ductos Lacrimais/diagnóstico por imagem , Obstrução dos Ductos Lacrimais/veterinária , Ducto Nasolacrimal/diagnóstico por imagem , Tomografia Computadorizada por Raios X/veterinária
ORL J Otorhinolaryngol Relat Spec ; 84(3): 200-204, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34304232


INTRODUCTION: Endoscopic dacryocystorhinostomy (DCR) is the treatment of choice for patients with lacrimal drainage system obstruction. Dacryocystography (DCG) is one of the most common preoperative studies and considered as a useful test demonstrating the anatomy of lacrimal drainage systems. OBJECTIVE: This study was designed to evaluate the diagnostic efficacy of DCG for canalicular obstruction and to compare surgical outcomes between true-obstruction versus pseudo-obstruction diagnosed with DCG. METHODS: A retrospective study was performed on 45 consecutive patients with lacrimal canalicular obstruction who had underwent endoscopic DCR with silicone tube insertion from January 2009 to December 2014 at a single tertiary hospital. A review of medical records included demographic data, preoperative symptoms and signs, results of intraoperative canalicular probing, and surgical outcomes including the postoperative symptom improvement and endoscopic finding. RESULTS: Of 45 patients, 34 patients (75.6%) had true-canalicular obstructions and 11 patients (24.4%) had pseudo-canalicular obstructions. The success rate of endoscopic DCR was 50% (17 of 34) in cases with true-canalicular obstruction while 90.9% (10 of 11) in pseudo-canalicular obstruction (p value <0.05). No intraoperative or postoperative complications including sinusitis or synechia were found. CONCLUSIONS: About a quarter of lacrimal canalicular obstruction cases diagnosed with DCG seem to be pseudo-obstruction. The success rate of endoscopic DCR in pseudo-canalicular obstruction is similar to that of saccal and nasolacrimal ductal obstruction.

Dacriocistorinostomia , Obstrução dos Ductos Lacrimais , Ducto Nasolacrimal , Dacriocistografia , Dacriocistorinostomia/métodos , Humanos , Obstrução dos Ductos Lacrimais/diagnóstico por imagem , Obstrução dos Ductos Lacrimais/terapia , Ducto Nasolacrimal/diagnóstico por imagem , Ducto Nasolacrimal/cirurgia , Estudos Retrospectivos , Resultado do Tratamento
Rev. bras. oftalmol ; 73(3): 185-187, May-Jun/2014. graf
Artigo em Português | LILACS | ID: lil-727186


Iodoterapia representa a terapia com iodo radioativo. A radiação beta emitida pelo iodo radioativo são partículas que irão se armazenar no tecido da tireóide destruindo as células cancerígenas que ainda restaram após a cirurgia (tireoidectomia). É importante enfatizar este possível efeito deletério da terapêutica, a qual afeta a mucosa da via lacrimal, sendo o resultado do processo de inflamação e cicatrização vascular, produzindo transtornos hipovasculares, hipocelulares e hipóxicos.

Iodotherapy represents the radioactive iodine therapy. The beta radiation emitted by radioactive iodine are particles that will be stored in the thyroid tissue destroying cancer cells that were left after surgery (thyroidectomy). It is important to emphasize a possible deleterious effect of therapy which affects the mucosa of the lacrimal system which results in a process of vascular inflammation and scarring producing disorders hypovascular, hypocellular and hypoxic.

Humanos , Feminino , Adulto , Radioisótopos do Iodo/efeitos adversos , Obstrução dos Ductos Lacrimais/etiologia , Neoplasias da Glândula Tireoide/radioterapia , Dacriocistografia , Radioisótopos do Iodo/uso terapêutico , Obstrução dos Ductos Lacrimais/diagnóstico