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 and a ferrule assembly spaced distally from a distal end of the guide lumen to define a gap between the ferrule assembly and the distal end of the guide lumen, the ferrule assembly releasably engaging a ferrule, the ferrule retaining a portion of a suture;
positioning the suturing device such that tissue surrounding the opening in tissue is disposed in the gap between the ferrule assembly and the distal end of the guide lumen;
inserting a needle distally through the guide lumen defined within the housing, through tissue disposed within the gap, and at least partially into the ferrule assembly to engage the ferrule with a distal end of the needle; and
translating the needle, with the ferrule engaged thereto, proximally through tissue disposed within the gap and the guide lumen defined within the housing to completely withdraw the ferrule and the portion of the 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 repeating, on an opposite side of the opening in tissue, inserting the suturing device, positioning the suturing device, inserting the needle, translating the needle, and removing the suturing device.
4. The method according to claim 3 , further including tying off the sutures to close the opening in tissue.
5. The method according to claim 1 , further including adjusting the gap by repositioning the ferrule assembly with respect to the housing.
6. The method according to claim 5 , wherein the gap is adjusted in accordance with a thickness of tissue to be sutured.
7. The method according to claim 5 , wherein the gap is adjusted at least one of before inserting the suturing device and before inserting the needle.