Background: Classical mechanical dilators for cervical dilation are associated with\r\nvarious complications, such as uterine perforation, cervical laceration, infections and\r\nintraperitoneal hemorrhage. A new medical device called continuous controllable\r\nballoon dilator (CCBD) was constructed to make a significant reduction in all of the\r\nside effects of traditional mechanical dilation.\r\nMethod: In this study we investigated numerically the cervical canal tissue response\r\nfor Hegar and CCBD using our poroelastic finite element model and in-house\r\nsoftware development. Boundary conditions for pressure loading on the tissue for\r\nboth dilators in vivo were measured experimentally. Material properties of the\r\ncervical tissue were fitted with experimental in vivo data of pressure and fluid\r\nvolume or balloon size.\r\nResults: Obtained results for effective stresses inside the cervical tissue clearly\r\nshowed higher stresses for Hegar dilator during dilation in comparison with our\r\nCCBD.\r\nConclusion: This study opens a new avenue for the implementation of CCBD device\r\ninstead of mechanical dilators to prevent cervical injury during cervical dilation
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