Analysis of mechanical contact behavior between the catheter and trachea tissue during bronchoscopy

다국어 초록 (Multilingual Abstract)

As for the contact mechanics between the catheter and trachea tissue during bronchoscopy, the anterior and curved part of the catheter were selected for analysis. The material parameters of each sample were obtained by uniaxial tensile experiments. And this paper verified the stress changes during the contact process using ABAQUS software from three aspects: different material property parameters, contact angle, and catheter bending angle. The results show that: when the characteristic parameter is 90°, the force on the trachea is minimal.
And the force changes in a small range when the contact angle is kept at 45°-75°. When the catheter enters the next level of the trachea, the bending part is in contact with the trachea wall.
At this time, keeping the bending angle at 15°-30° helps to reduce the contact force. This study could provide a theoretical basis for surgical instruments' interventional therapy.