Biopsy device for sampling tissue probes and application of substances in one operation

摘要

The construction consists of a multilumen cannula with a biopsy channel (1), which comprises the full cross-sectional diameter of the cannula, and one or more side channels (2); (2a, 2b) which are used for the application of substances and which communicate with the biopsy channel in the area of the cannula tip (Fig. 1:1). The arrangement of the channels (1, 2, 2a, 2b) guarantees a maximum cross- sectional diameter of the tissue samples with a minimum cross- sectional diameter of the needle. In the design in which the cutting end of the biopsy device is formed solely by the wall of the biopsy channel (Fig. 9:1) cut at an acute angle, and the application channel (2) formed by a tube pushed eccentrically over the biopsy channel does not extend as far as the cutting end, on the one hand the tissue is cut during the biopsy procedure without being damaged by the application channel (2), and on the other hand the application channel (2) with only a displacing action is not blocked by tissue. The application system is controlled automatically by the puncturing procedure via a contact mechanism (5, 6). By means of this invention, it is possible to significantly shorten the time of the operation for removing tissue and applying substances. In this way, complications in the context of biopsy can be avoided, and the indications for biopsy can be extended. IMAGE