Construct Validity of Fresh Frozen Human Cadaver as a Training Model in Minimal Access Surgery
نویسندگان
چکیده
BACKGROUND The construct validity of fresh human cadaver as a training tool has not been established previously. The aims of this study were to investigate the construct validity of fresh frozen human cadaver as a method of training in minimal access surgery and determine if novices can be rapidly trained using this model to a safe level of performance. METHODS Junior surgical trainees, novices (<3 laparoscopic procedure performed) in laparoscopic surgery, performed 10 repetitions of a set of structured laparoscopic tasks on fresh frozen cadavers. Expert laparoscopists (>100 laparoscopic procedures) performed 3 repetitions of identical tasks. Performances were scored using a validated, objective Global Operative Assessment of Laparoscopic Skills scale. Scores for 3 consecutive repetitions were compared between experts and novices to determine construct validity. Furthermore, to determine if the novices reached a safe level, a trimmed mean of the experts score was used to define a benchmark. Mann-Whitney Utest was used for construct validity analysis and 1-sample t test to compare performances of the novice group with the benchmark safe score. RESULTS Ten novices and 2 experts were recruited. Four out of 5 tasks (nondominant to dominant hand transfer; simulated appendicectomy; intracorporeal and extracorporeal knot tying) showed construct validity. Novices' scores became comparable to benchmark scores between the eighth and tenth repetition. CONCLUSION Minimal access surgical training using fresh frozen human cadavers appears to have construct validity. The laparoscopic skills of novices can be accelerated through to a safe level within 8 to 10 repetitions.
منابع مشابه
Introducing a Fresh Cadaver Model for Ultrasound-guided Central Venous Access Training in Undergraduate Medical Education
INTRODUCTION Over the past decade, medical students have witnessed a decline in the opportunities to perform technical skills during their clinical years. Ultrasound-guided central venous access (USG-CVA) is a critical procedure commonly performed by emergency medicine, anesthesia, and general surgery residents, often during their first month of residency. However, the acquisition of skills req...
متن کاملCadaver-based Necrotizing Fasciitis Model for Medical Training
Necrotizing fasciitis is a devastating infectious disease process that is characterized by extensive soft tissue necrosis along deep fascial planes, systemic toxicity, and high mortality. Ultrasound imaging is a rapid and non-invasive tool that can be used to help make the diagnosis of necrotizing fasciitis by identifying several distinctive sonographic findings. The purpose of this study is to...
متن کاملDevelopment of a Perfused Cadaver Model of Exsanguinating Hemorrhage for Procedural Training and Device Evaluation
Introduction: We demonstrate a novel perfused cadaver model with realistic tissue feel, true anatomy, and replicating key local physiologic parameters of acute life-threatening hemorrhage. Validation of fidelity is accomplished through measurement of hemodynamics and video confirmation of hemorrhage control. Methods: A pulsatile pump was attached to the ascending and descending aorta of a fresh...
متن کاملCadaver-based abscess model for medical training
Ultrasound imaging is a rapid and noninvasive tool ideal for the imaging of soft tissue infections and is associated with a change of clinician management plans in 50% of cases. We developed a realistic skin abscess diagnostic and therapeutic training model using fresh frozen cadavers and common, affordable materials. Details for construction of the model and suggested variations are presented....
متن کامل