Patent ID: 8992569
Filing Date: 2015-03-31
Classification: A61B

Abstract:
1. An insertion device, comprising: an outer cannula having a lumen extending therethrough; an elongate sleeve having an inner lumen extending therethrough, the elongate sleeve having an outer diameter less than an inner diameter of the lumen of the outer cannula so that the elongate sleeve can be slidably disposed within the outer cannula; and a tissue retraction mechanism slidably disposed within the inner lumen of the elongate sleeve, the tissue retraction mechanism configured to extend from a distal end of the sleeve and be temporarily deployed through tissue and into a body cavity in advance of the elongate sleeve and outer cannula, and removed from the tissue after the outer cannula has been deployed through at least one layer of tissue, the tissue retraction mechanism having a distal end member configured to move from a delivery configuration to a deployed configuration in which the tissue retraction mechanism is oriented so as to be substantially perpendicular to a longitudinal axis of the elongate sleeve without changing shape and to engage tissue and apply a pulling force to the tissue as the tissue retraction mechanism is moved proximally; wherein the outer cannula has a diameter sufficient to allow passage of the distal end of the retraction mechanism in the deployed configuration as the retraction mechanism is withdrawn through the outer cannula.