Patent ID: 8282546
Filing Date: 2012-10-09
Classification: A61B

Abstract:
1. An adjustable access device, comprising: a housing; an expandable cannula extending distally from the housing, the expandable cannula including a coil spring having a proximal end coupled to the housing and a distal end configured to rotate relative to the housing to adjust a diameter of the cannula such that the coil spring is effective to move the expandable cannula between an insertion configuration, in which the cannula has a substantially constant outer diameter between a proximal end and a distal end, and an expanded configuration, in which the diameter of the cannula increases from the proximal end of the cannula to the distal end of the cannula; and an obturator having a distal end configured to engage the distal end of the coil spring such that rotation of the obturator is effective to rotate the distal end of the coil spring relative to the housing.