Usability Questionnaire of the Sirius Endoscope System using a 1–5 Likert scale for each question (1=strongly disagree; 2=disagree; 3=neither agree nor disagree; 4=agree; 5=strongly agree)
| Articulated tip | Mean score Likert scale | SD |
| The presence of the 3 df articulated tip is beneficial to the surgery | 3.93 | 0.47 |
| When using the joystick to control the articulation, the response time is satisfactory | 3.43 | 0.76 |
| The articulated tip movement including C-shaped or S-shaped bending can provide a wider field of view during surgery | 3.93 | 0.62 |
| Imaging | ||
| Recognition of details/anatomy is satisfactory | 3.50 | 0.65 |
| Color brilliance is satisfactory | 3.00 | 0.96 |
| Illumination/brightness is sufficient | 3.29 | 0.83 |
| Field of view is satisfactory | 3.93 | 0.47 |
| Stability of the image is satisfactory (image glitch, disconnection…etc) | 3.29 | 0.73 |
| Overall, the image quality is satisfactory | 3.36 | 0.50 |
| Usability | ||
| The Sirius Endoscope is easy to set-up | 3.71 | 0.47 |
| Time for preparation/setup is satisfactory | 3.71 | 0.47 |
| Overall, I am satisfied with the set-up procedure | 3.71 | 0.47 |
| The Sirius Endoscope System is compatible with the procedure | 3.71 | 0.73 |
| The Sirius Endoscope System was easy to use | 3.43 | 0.85 |
| When using the joystick to control the articulated tip, the response time is satisfactory | 3.07 | 0.62 |
| Weight of the endoscope handle is satisfactory | 3.14 | 0.86 |
| Ergonomics of the Sirius Endoscope is satisfactory | 3.29 | 0.61 |
| Sterile and non-sterile areas are clearly identifiable during setup/surgery/takedown | 3.71 | 0.61 |
| Overall I am satisfied with the Sirius Endoscope System | 3.57 | 0.65 |