Patent ID: 8771306

Claim:
A method of creating an incision in tissue, the method including: providing an insertion device having a tubular member and a cutting assembly, wherein the tubular member includes at least one longitudinal slot extending proximally from a distal end thereof and is configured to be received through tissue, wherein a blade assembly of the cutting assembly is configured to be slidingly received through the longitudinal slot of the tubular member; inserting the distal end of the tubular member through tissue and into a body cavity; inserting the cutting assembly through the tubular member; moving at least one blade of the blade assembly from a retracted position in which a linear cutting surface of the at least one blade is disposed along the tubular member to an extended position in which the linear cutting surface of the at least one blade is disposed transverse to the tubular member such that the at least one blade of the blade assembly is received through the longitudinal slot of the tubular member; and retracting the cutting assembly relative to the tubular member to create an incision about the tubular member.