Analysis of Learning Curves for Transpedicular Puncture

Abstract

Objective The authors propose the analysis of quantitative and qualitative learning curves of transpedicular puncture in a manikin-type training simulator model for transpedicular puncture (SMTP)

Methods Six students (S1 to S6) were selected to perform the puncture training under radiological control. Quantitative parameters such as the procedure time (total time spent in performing each procedure) and fluoroscopy time (fluoroscopy usage time for each punch) were analyzed using the Mann-Whitney test. For the qualitative evaluation, the punctures were categorized into type AB (adequate) or CD (inadequate) according to the path and positioning of the needle. Qualitative data were analyzed by Fisher's exact test.

Results The curves of the examination times and fluoroscopy decreased steadily as expected, especially for the trainee S3. In addition, there was a predominance of punctures AB of the third subsequent session; however, this result was statistically significant for the S1 and S2 trainees.

Conclusion The learning curves indicate that qualitative performance improves as students become more familiar with the process.

Resumo

Objetivo Os autores propõem a análise de curvas de aprendizado quantitativa e qualitativa para punção transpedicular em modelo simulador tipo manequim (SMTP).

Método Foram selecionados seis estudantes (S1 a S6) para treinamento de punção transpedicular sob controle radiológico. Parâmetros quantitativos como tempo de procedimento (tempo total gasto na performance de cada punção) e tempo de fluoroscopia (tempo de utilização fluoroscopia em cada punção) foram analisados através do teste Mann-Whitney. Análise qualitativa categorizada em punção AB (adequada) ou CD (inadequada) de acordo com o trajeto e posicionamento da agulha. Os dados qualitativos foram analisados através do teste de Fisher.

Resultado As curvas dos tempos de exame e fluoroscopia diminuíram de forma constante conforme esperado, especialmente para o estagiário S3. Adicionalmente, houve predominância de punções AB na terceira sessão; entretanto, este resultado foi estatisticamente significante para os estagiários S1 e S2.

Conclusão As curvas de aprendizado qualitativas indicaram melhora da performance a medida que o processo torna-se mais familiar aos estudantes.

Keywords

manikin-type training simulator model for transpedicular puncture - transpedicular - puncture - learning curves

Palavras-chave

modelo simulador tipo manequim para punção transpedicular - transpedicular - punção - curva de aprendizado

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