Tost F, Bruder R, Clemens S
Klinik und Poliklinik für Augenheilkunde der Ernst-Moritz-Arndt-Universität, Greifswald, Deutschland.
Ophthalmologica. 2000;214(6):433-6. doi: 10.1159/000027539.
The practical value of high-resolution ultrasound (transducer frequency of 20 MHz) in the study of the lacrimal canaliculi has been proven. It can also be used in the clinical diagnosis of chronic canaliculitis. If the classic symptoms are absent, the clinical diagnosis is often inaccurate, and treatment is insufficient. Representative images of normal cases and of chronic canaliculitis illustrate the potential of high-resolution ultrasound. In our patient, 20-MHz scanner images revealed pathological findings which were invisible during slitlamp examination. Ultrasonic images of chronic canaliculitis showed ectasia of the canaliculus and sulfur grains. High-resolution ultrasonic examination of the lacrimal drainage system demonstrated that the 20-MHz scanner used was able to show concrements (sulfur grains), measuring 1-2 mm in diameter. Such more reflective structures (like sulfur grains) are a pathognomonic sign of chronic canaliculitis. Our report confirms the efficiency of 20-MHz sonography in the diagnosis of canaliculitis without any side effects.
高分辨率超声（换能器频率为20兆赫）在泪小管研究中的实用价值已得到证实。它还可用于慢性泪小管炎的临床诊断。若缺乏典型症状，临床诊断往往不准确，治疗也不充分。正常病例和慢性泪小管炎的代表性图像说明了高分辨率超声的潜力。在我们的患者中，20兆赫扫描仪图像显示了裂隙灯检查时无法看到的病理表现。慢性泪小管炎的超声图像显示泪小管扩张和硫磺颗粒。对泪道系统进行高分辨率超声检查表明，所使用的20兆赫扫描仪能够显示直径为1 - 2毫米的结石（硫磺颗粒）。这种反射性更强的结构（如硫磺颗粒）是慢性泪小管炎的特征性体征。我们的报告证实了20兆赫超声检查在诊断泪小管炎方面的有效性，且无任何副作用。
