Wound closure device including direct-driven needle
A suturing device includes a housing, a rod, a ferrule assembly, and a needle. The housing defines a guide lumen extending longitudinally therethrough. The rod is engaged with the housing and extends distally therefrom. The ferrule assembly is disposed at a distal end of the rod and is configured to releasably retain a ferrule therein. The ferrule is adapted to retain of a portion of a suture therein. The needle is configured for translation through the guide lumen defined within the housing. A distal end of the needle is configured to engage the ferrule within the ferrule assembly for removal of the ferrule from the ferrule assembly.
1. A method of suturing an opening in tissue, comprising:
inserting a suturing device through an opening in tissue, the suturing device including a housing defining a guide lumen, a rod coupled to the housing and extending distally from the housing, and a ferrule assembly coupled to a distal portion of the rod, the ferrule assembly releasably engaging a first ferrule, the first ferrule retaining a portion of a first suture, wherein the suturing device is inserted through the opening in tissue such that the ferrule assembly is disposed on an interior side of tissue;
inserting a needle distally through the guide lumen defined within the housing, through tissue, and at least partially into the ferrule assembly to engage the first ferrule with a distal end portion of the needle; and
translating the needle proximally to disengage the first ferrule from the ferrule assembly and move the needle proximally through tissue and the guide lumen defined within the housing to withdraw the first ferrule and the portion of the first suture from the guide lumen.
2. The method according to claim 1 , further including removing the suturing device from the opening in tissue.
3. The method according to claim 2 , further including re-loading the suturing device by releasably engaging a second ferrule with the ferrule assembly, the second ferrule retaining a portion of a second suture.
4. The method according to claim 3 , further including disengaging the first ferrule from the distal end portion of the needle.
5. The method according to claim 4 , further including:
inserting the suturing device through the opening in tissue such that the ferrule assembly is disposed on the interior side of tissue on an opposite side of the opening in tissue;
inserting the needle distally through the guide lumen defined within the housing, through tissue, and at least partially into the ferrule assembly to engage the second ferrule with the distal end portion of the needle; and
translating the needle proximally to disengage the second ferrule from the ferrule assembly and move the needle proximally through tissue and the guide lumen defined within the housing to withdraw the second ferrule and the portion of the second suture from the guide lumen.
6. The method according to claim 5 , further including removing the suturing device from the opening in tissue.
7. The method according to claim 6 , further including tying off the first and second sutures to close the opening in tissue.
8. The method according to claim 1 , further including adjusting the positioning of the rod with respect to the housing according to a thickness of tissue to be sutured before inserting the needle.
9. The method according to claim 8 , wherein the position of the rod with respect to the housing is adjusted before inserting the suturing device.
10. The method according to claim 1 , wherein the suturing device is inserted such that tissue is disposed between a distal end portion of the guide lumen and the ferrule assembly.