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<p>Contact between the catheter tip of a fiberoptic bronchoscope and the bronchial wall can cause patient discomfort, including mucosal injury and bronchospasm. This study establishes a contact force model between the catheter tip and bronchial tissue, and adopts a hyperelastic constitutive law for the tissue. Using finite element analysis, we investigate how contact angle and intervention velocity influence contact force. An experimental bronchial catheter intervention platform was developed to measure the relation among contact angle, intervention velocity, and contact force. Results indicate that reducing both the contact angle and the intervention velocity decreases bronchial irritation; contact stress was minimized at a contact angle of 10° and an intervention velocity of 5 mm/s. These findings validate the contact model and provide theoretical support for automated intervention processes.</p>

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Contact force analysis of bronchoscopic catheter and bronchial tissue in bronchial interventions

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Yudong Bao,
  • Junhong Tang,
  • Yang Zhan,
  • Wen Wei

摘要

Contact between the catheter tip of a fiberoptic bronchoscope and the bronchial wall can cause patient discomfort, including mucosal injury and bronchospasm. This study establishes a contact force model between the catheter tip and bronchial tissue, and adopts a hyperelastic constitutive law for the tissue. Using finite element analysis, we investigate how contact angle and intervention velocity influence contact force. An experimental bronchial catheter intervention platform was developed to measure the relation among contact angle, intervention velocity, and contact force. Results indicate that reducing both the contact angle and the intervention velocity decreases bronchial irritation; contact stress was minimized at a contact angle of 10° and an intervention velocity of 5 mm/s. These findings validate the contact model and provide theoretical support for automated intervention processes.