Bonnet F, Ducasse A, Marcus C, Hoeffel C
Service de Radiologie, Hôpital Robert Debré, Reims, France.
J Radiol. 2009 Nov;90(11 Pt 1):1685-93. doi: 10.1016/s0221-0363(09)73267-6.
CT dacryocystography, performed under sterile technique and following local anesthesia, is well tolerated by patients. It is the imaging technique of choice in patients with persistent tearing following clinical examination with non-invasive procedures when patency of the lacrimal drainage system remains uncertain, when a dacryolith or tumor is suspected or following unsuccessful dacryocystorhinostomy. Two techniques are available: instillation or direct cannulation, either initially or after non-visualization of the nasolacrimal system after contrast instillation. Non-specific idiopathic stenosis at the mid portion of the nasolacrimal duct is the most frequent etiology in patients over 50 years old; dacryoliths are present in 5 to 20% of cases of nasolacrimal duct stenosis. CT dacryocystography also allows evaluation of surrounding structures (medicolegal) to identify variants and anomalies when surgery is contemplated to avoid potential complications.
CT泪囊造影术在无菌技术和局部麻醉下进行，患者耐受性良好。对于经临床检查采用非侵入性方法后仍持续流泪且泪道引流系统通畅情况不明、怀疑有泪石或肿瘤或泪囊鼻腔吻合术失败的患者，它是首选的成像技术。有两种技术可供选择：滴注法或直接插管法，可在最初使用，也可在滴注造影剂后未观察到鼻泪系统时使用。鼻泪管中部的非特异性特发性狭窄是50岁以上患者最常见的病因；泪石在鼻泪管狭窄病例中占5%至20%。CT泪囊造影术还可用于评估周围结构（法医学方面），以便在考虑手术时识别变异和异常情况，避免潜在并发症。
