Filling the gap between the OR and virtual simulation: a European study on a basic neurosurgical procedure.

Author:Perin A, Galbiati TF, Gambatesa E, Ayadi R, Orena EF, Cuomo V, Riker NI, Falsitta LV, Schembari S, Rizzo S; European Neurosurgery Simulation Study Group (ENSSG), Luciano C, Cappabianca P, Meling TR, Schaller K, DiMeco F
Published on:Acta Neurochir (Wien). 2018 Nov;160(11):2087-2097

Presentation

I simulatori attualmente disponibili dovrebbero permettere ai giovani neurochirurghi di affinare le loro capacità tecniche in un ambiente sicuro, senza causare alcun danno inutile ai loro pazienti per la loro inesperienza. Affinché questo metodo di allenamento sia ampiamente accettato in neurochirurgia, è necessario dimostrare l'efficacia della simulazione mediante studi di validazione clinica su larga scala. In questo studio sono state correlate e analizzate le prestazioni di un simulatore e le effettive capacità operative di diversi neurochirurghi (validità del costrutto) di diversi centri europei

Abstract

BACKGROUND:

Currently available simulators are supposed to allow young neurosurgeons to hone their technical skills in a safe environment, without causing any unnecessary harm to their patients caused by their inexperience. For this training method to be largely accepted in neurosurgery, it is necessary to prove simulation efficacy by means of large-scale clinical validation studies.

METHODS:

We correlated and analysed the performance at a simulator and the actual operative skills of different neurosurgeons (construct validity). We conducted a study involving 92 residents and attending neurosurgeons from different European Centres; each participant had to perform a virtual task, namely the placement of an external ventricular drain (EVD) at a neurosurgical simulator (ImmersiveTouch). The number of attempts needed to reach the ventricles and the accuracy in positioning the catheter were assessed.

RESULTS:

Data suggests a positive correlation between subjects who placed more EVDs in the previous year and those who get better scores at the simulator (p = .008) (fewer attempts and better surgical accuracy). The number of attempts to reach the ventricle was also analysed; senior residents needed fewer attempts (mean = 2.26; SD = 1.11) than junior residents (mean = 3.12; SD = 1.05) (p = .007) and staff neurosurgeons (mean = 2.89, SD = 1.23). Scoring results were compared by using the Fisher's test, for the analysis of the variances, and the Student's T test. Surprisingly, having a wider surgical experience overall does not correlate with the best performance at the simulator.

CONCLUSION:

The performance of an EVD placement on a simulator correlates with the density of the neurosurgical experience for that specific task performed in the OR, suggesting that simulators are able to differentiate neurosurgeons according to their surgical ability. Namely this suggests that the simulation performance reflects the surgeons' consistency in placing EVDs in the last year.

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