A model for training ultrasound-guided fine-needle punctures

OBJECTIVE: To evaluate the efficacy of a training program in ultrasound-guided fine needle puncture using a cost-effective model. METHODS: We evaluated the training of 20 resident radiology physicians, based on a theoretical course and a practical simulation part with models that focused on the puncture technique of thyroid nodules. The total time to perform the procedure, the number of punctures on the model surface, and the application of a questionnaire were used to assess the performance and confidence of the resident physicians in performing the procedure. RESULTS: The training model used was easy to reproduce, inexpensive, versatile, and capable of simulating the echotexture of thyroid tissue. There was a significant reduction in the total time needed to perform the procedure with a mean of 173.7 s +/- 91.28 s from R1 and 112.8 s +/- 17.66 s from R2 before the course vs. 19.2 s +/- 112.8 s and 14.3 s +/- 9.36 s, respectively, after the course (p<0.0001); as well as the number of superficial punctures, with a mean of 2.2 punctures +/- 0.92 from R1 and 1.5 punctures +/- 0.32 from R2 before the course vs 1.1 punctures +/- 0.71 and 1.0 puncture +/- 0.0, respectively, after the course (p<0.0001). There was also a subjective improvement in the performance and confidence in performing this procedure. CONCLUSIONS: An inexpensive and easy-to-reproduce gelatin-based model enabled adequate training of resident physicians and proved capable of improving their skills and confidence in simulating the procedure, even with a short period of training.