Optimierung der Schilddrüsen- Feinnadelpunktion

Abstract

SummaryObjective: Optimization of a specially developed automatic microaspirator for fine-needle aspiration of suspicious thyroid nodules. Patients, method: In a preliminary test biopsy effectiveness was evaluated in 20 native resected thyroid glands in vitro with both a Cameco® gun and a specially designed microaspirator respectively. In addition in both techniques two different needles (21-G and 27-G) were used to evaluate the influence of these two cannula. Subsequently, 103 thyroid nodules were biopsied in vivo and compared the results with a preliminary series of the same physician. In the workup and evaluation of the cytology the ThinPrep® technology was used. Results: In vitro the automatic microaspirator was superior to Cameco gun in both when using the 21-Gauge and the 27-Gauge needle. In terms of needle sizes a statistically significant difference at the 95% confidence level was evident for both comparisons in favor of 21-gauge needle. In vivo, 91% of punctures with the microaspirator were usable, while in the pre-series only 84% were usable (p > 0.05). Conclusion: The automatic microaspirator is superior to the manual aspiration. Moreover, under sonographic control it is more convenient, to biopsy even very small nodules and lesiosn (down to 4 mm in diameter)