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Development of a deep learning model for safe direct optical trocar insertion in minimally invasive surgery: an innovative method to prevent trocar injuries

  • 2023 SAGES Poster
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Abstract

Background

Direct optical trocar insertion is a common procedure in laparoscopic minimally invasive surgery. However, misinterpretations of the abdominal wall anatomy can lead to severe complications. Artificial intelligence has shown promise in surgical endoscopy, particularly in the employment of deep learning models for anatomical landmark identification. This study aimed to integrate a deep learning model with an alarm system algorithm for the precise detection of abdominal wall layers during trocar placement.

Method

Annotated bounding boxes and assigned classes were based on the six layers of the abdominal wall: subcutaneous, anterior rectus sheath, rectus muscle, posterior rectus sheath, peritoneum, and abdominal cavity. The cutting-edge YOLOv8 model was combined with a deep learning detector to train the dataset. The model was trained on still images and inferenced on laparoscopic videos to ensure real-time detection in the operating room. The alarm system was activated upon recognizing the peritoneum and abdominal cavity layers. We assessed the model’s performance using mean average precision (mAP), precision, and recall metrics.

Results

A total of 3600 images were captured from 89 laparoscopic video cases. The proposed model was trained on 3000 images, validated with a set of 200 images, and tested on a separate set of 400 images. The results from the test set were 95.8% mAP, 89.8% precision, and 91.7% recall. The alarm system was validated and accepted by experienced surgeons at our institute.

Conclusion

We demonstrated that deep learning has the potential to assist surgeons during direct optical trocar insertion. During trocar insertion, the proposed model promptly detects precise landmark references in real-time. The integration of this model with the alarm system enables timely reminders for surgeons to tilt the scope accordingly. Consequently, the implementation of the framework provides the potential to mitigate complications associated with direct optical trocar placement, thereby enhancing surgical safety and outcomes.

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Acknowledgements

We would like to thank the surgical team at Songklanagarind Hospital for their invaluable assistance in establishing the project set-up within the operating room and for their insightful feedback during laparoscopic surgery.

Funding

No funding was provided for this study.

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All authors contributed to the drafting of the manuscript.

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Correspondence to Siripong Cheewatanakornkul.

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Supakool Jearanai, Siripong Cheewatanakornkul, Piyanun Wangkulangkul, and Wannipa Sae-Lim affirm that they have no conflicts of interest to disclose.

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Jearanai, S., Wangkulangkul, P., Sae-Lim, W. et al. Development of a deep learning model for safe direct optical trocar insertion in minimally invasive surgery: an innovative method to prevent trocar injuries. Surg Endosc 37, 7295–7304 (2023). https://doi.org/10.1007/s00464-023-10309-1

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