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Validation of an Internally Developed Knee Model Designed to Facilitate Instruction in Practice of Arthrocentesis of the Knee

Objective: To validate an internally developed knee model for training knee arthrocentesis.

Materials and Methods: The present cross-sectional study was conducted at Siriraj Hospital (Bangkok, Thailand) between June 2017 and March 2018. The model was designed to closely simulate the characteristics of the knee so that trainees could learn and practice knee arthrocentesis. The model was validated by seven rheumatologists or orthopedists with long-term experience teaching arthrocentesis, 30 residents, and 155 6-year medical students (MS). The questionnaire response options were ‘very poor’, ‘poor’, ‘fair’, ‘good’, and ‘very good’. The target of evaluation was that 80% of participants would rate the model as good to very good. 

Results: All instructors evaluated the model as good to very good for simulated human knee, ability to perform the process as done in a real patient, suitability for practice, safety, convenience, and global quality. More than 80% of MS and residents rated good to very good for simulated human knee, safety, convenience, perceived increase in experience and confidence, and global assessment.

Conclusion: The evaluated knee model was shown to be a valid tool for teaching arthrocentesis. This model should be considered a suitable tool for knee arthrocentesis training and practice.

Keywords: Validation, Knee model, Knee arthrocentesis, Part-task trainer