A New Design of Adjustable-Automated Blopsy Device and Its Clinical Application<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

张武　张铁山　贾建文　吕国荣　邹万忠　霍信礼

Zhang Wu, Zhang Tieshan, Jia Jianwen, el al

Department of Ultrasonics, The Third Hospital, Beijing Medical University, Beijing 100083

ABSTRACT

A new type of tissue core biopsy apparatus－adjustable automated biopsy device (AABD)and its modified Tru-Cut type needle has been designed. A mechanism Which allow the stroke length of the needle to be continuously adjusted was installed in the AABD, so the stroke length can be easily selected from 11.5mm to 23mm according to the different size and position of the lesions of tumors in the body. The blind area of the modified Tru-Cut needle at the distal tip of the stylet has been reduced from 5～6mm to 3mm, So then the risk of hitting any normal sensitive structures beyond the target area could be reduced. Because the length of the slot on the stylet extends from conventional 17mm to 19mm, theoretically, the maximal length of the tissue core to be retrieved in the stylet varies from 7mm to 19mm. The results of our experimental studies and clinical applications show that AABD is a safe, accurate, sampling-reliable, valuable diagnostic tool. Biopsy speciment sufficient for histologic analysis are obtained in all of the lesions(174/174).For the first sampling, the success rate was accounted for 95%(155/162).

Key words：biopsy;neoplasm;ultrasound; sonography