# Chest Compression Skill Evaluation System Using Pose Estimation and Web-Based Application
## 7 Conclusions  
In the Conclusion, \"This study explored the development and evaluation of a web-based chest compression assessment system using posture estimation via key point de \begin{table}
\begin{tabular}{l c} \hline
**Questions (Positive)** & **SUS Mean Score** \\ \hline
1: Did you find the system easy to use? & 8.5 \\ \hline
3: Did you find the system’s functions to be smoothly & \\ coordinated and unified overall? & 9.0 \\ \hline
5: Would you recommend this system to others? & 7.75 \\ \hline
7: When introducing this system, can you teach it with & 7.75 \\ confidence? & \\ \hline
9: Would you like to use this system when performing chest & 8 \\ compression assessments? & \\ \hline
**Questions (Negative)** & \\ \hline
2: Did you find that there were many errors when using this & 6.75 \\ system? & 7.75 \\ \hline
6: Did you find it time consuming to learn how to use this & 9.25 \\ system? & 8.25 \\ \hline
8: Did you feel that you needed to learn a lot before using this & 5.25 \\ system? & 10: Do you think this system is unnecessarily complicated? & 8.25 \\ \hline
**Score** & **78.25** \\ \hline \end{tabular}
\end{table} 
Table 6: Results of evaluate web application. tection. The motivation for choosing this approach was primarily its affordability and simplicity. The system only requires a video recording device such as a smartphone, making it highly accessible. In modern settings, this lowers the barrier to regular training by requiring only a manikin and a recording device, without the need for specialized sensors or equipment. Compared with related studies [13; 14; 15] that utilize accelerometers, pressure sensors, and smartwatches, our system demonstrated competitive accuracy in evaluating tempo and compression count. However, as discussed earlier, compression depth and recoil estimation showed limited accuracy, which suggests the current method's insufficiency in evaluating three-dimensional movements. The evaluation of the web application itself, based on SUS scores from 10 participants, showed general usability, though further assessments involving a broader range of users are required. The current implementation is designed for users on the same Wi-Fi network to upload recorded videos to a server for analysis. Real-time feedback was intentionally not implemented, as we initially assumed that multitasking during chest compressions could be burdensome, particularly for children and older adults. However, many existing evaluation tools include real-time voice guidance and on-screen line graphs of compression depth during CPR. Therefore, adding real-time visualization and evaluation of depth and posture is considered a crucial direction for future improvement. Furthermore, we recognize that posture estimation using key point detection has inherent limitations. Future work will explore segmentation-based methods to enable more precise spatial analysis and potentially improve accuracy in critical metrics such as depth and recoil. Through these enhancements, we aim to build a more reliable and practical compression evaluation system. This study has several limitations. First, all participants in the chest compression experiment were university students, and neither teenagers nor middle-aged individuals were included, which limits the generalizability of the results. Additionally, the usability evaluation of the web application was conducted only with the ten students who also participated in the chest compression experiment, and the selection was not randomized. Future studies should include a broader and more diverse age group and assess whether users who did not participate in the compression experiments can use the system correctly. Second, the videos used for posture estimation were recorded under well-lit conditions and were adjusted to 60 frames per second (fps) before analysis. If videos are recorded under lower lighting conditions or at lower frame rates, the system's performance may not achieve the same level of accuracy as reported in this study.