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  Tack and tack applierRelated Patent Categories: Surgery, Instruments, Surgical Mesh, Connector, Clip, Clamp Or BandThe Patent Description & Claims data below is from USPTO Patent Application 20070208358. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from and the benefits of U.S. provisional application No. 60/374,672 filed on Apr. 22, 2002. BACKGROUND [0002] 1. Technical Field [0003] The present disclosure relates to a novel tack and, more particularly to a low profile tack having deformable legs for securing a surgical mesh to body tissue. In addition, the present disclosure relates to a surgical tack applier and, more particularly to a surgical tack applier adapted to accommodate and apply a plurality of the surgical tacks of this disclosure. [0004] 2. Background of Related Art [0005] A number of surgical procedures require instruments that are capable of applying a surgical fastener to tissue in order to form tissue connections or to secure objects to tissue. For example, during hernia repair it is often desirable to fasten a surgical mesh to the underlying body tissue. In certain hernias, such as direct or indirect inguinal hernias, a part of the intestine protrudes through a defect or an opening in the supporting abdominal wall to form a hernial sac. The opening can be repaired using an open surgical procedure where a relatively large incision is made in the patient and the hernia is closed outside the abdominal wall by suturing. Often, a mesh is attached with sutures over the opening to provide reinforcement. [0006] Less invasive surgical procedures are currently available for hernia repair. In laparoscopic procedures, surgery is performed in the abdomen through a small incision, while in endoscopic procedures surgery is performed through narrow endoscopic tubes inserted through small incisions in the body. Laparoscopic and endoscopic procedures generally require long and narrow instruments capable of reaching deep within the body and configured to form a seal with the incision or tube through which they are inserted. [0007] Currently, endoscopic techniques for hernia repair utilize fasteners, such as surgical staples or clips, to secure the mesh to the tissue thereby providing reinforcement of the repair and providing structure for the encouragement of tissue ingrowth. These staples or clips need to be compressed against the tissue and mesh in order to secure the two together thereby requiring a tool which is positioned on either side of the mesh and tissue in order to deform the staple or clip. [0008] Another type of fastener suited for use in affixing mesh to tissue, during procedures such as hernia repair, is a coil fastener having a helically coiled body portion terminating in a tissue penetrating tip, in which the helical fastener is screwed into the mesh and body tissue. An example of this type of fastener is disclosed in U.S. Pat. No. 5,258,000 to Gianturco. [0009] Yet another type of fastener suited for use in affixing surgical mesh to body tissue is a surgical tack that is driven through the surgical mesh and buried into the body tissue. In some embodiments, the tack comprises a pair of substantially parallel legs interconnected by a suture. Many different instruments for applying the surgical tacks through the surgical mesh and into the body tissue are known. [0010] A need exists for a different surgical tack that firmly secures a surgical mesh to underlying body tissue and is readily removable without damaging the underlying tissue. A need exists for a tack having a low profile that when applied, is substantially in flush contact with the surface of the mesh. A need also exists for a tacking apparatus adapted for securing a surgical mesh to underlying body tissue utilizing the surgical tacks of the present disclosure. A need exists for such a tack applier, wherein each of a plurality of tacks can be applied with a single pull of a trigger, and for a tack applier that can apply a plurality of tacks seriatim through a replaceable tubular portion or jacket or cartridge. SUMMARY [0011] This invention is directed to a surgical tack for securing a mesh material to body tissue including a pair of legs where each leg has a proximal end and a free distal end. The legs of the surgical tack define a vertical plane. An arcuate cross-member is interconnected to the proximal ends of the legs and defines a centerline existing in the vertical plane where the centerline is substantially equidistant between the proximal ends of the legs and the arcuate cross-member defines a plane at an angle with respect to the vertical plane defined by the legs. The arcuate cross-member can be oriented substantially orthogonal to the vertical plane as defined by the pair of legs. The distal ends the legs can be provided with a pointed tip. The legs can be substantially parallel to one another and substantially parallel to the centerline. At least one leg of the legs does not have to be parallel to the centerline. The surgical tack can be made from a shape memory material or a bio-absorbable material, such as polyglycolic acid, polylactic acid, and polyglycolide. [0012] The invention is also directed to a surgical fastener applier including a housing and an elongate tubular portion having a proximal end and a distal end. The elongate tubular portion further includes a bore therethrough and an elongate jacket having an inner surface defining a longitudinal main channel extending through the jacket, the main channel being adapted to receive a surgical tack having a pair of depending legs and an arcuate cross-member interconnecting proximal ends of the legs, the main channel having an inner surface that includes a pair of longitudinally extending sub channels formed along the inner surface, each of the pair of sub channels being adapted to receive at least a portion of a respective one of a pair of legs of the surgical fastener therein. A rotatable drive rod having a proximal end and a distal end extends axially through the jacket, the drive rod including a longitudinally extending helical thread, the helical thread defining a groove that is adapted to receive the arcuate cross-member of the surgical fastener therein. A mechanism is operatively connected to the drive rod for rotating the drive rod to drive fasteners, legs first, from the distal end of the drive rod and from the distal end of the tubular portion. The pair of sub channels of the jacket can be diametrically opposed. The jacket can include a plurality of pairs of sub channels formed along the inner surface where each pair of sub channels can be at least less than 180 degrees apart from one another. The mechanism can include a trigger pivotably coupled to the surgical applier. The applier may further include a mechanical deforming means operatively coupled to a distal end of the jacket, where the deforming means is adaptable to deflect the pair of legs of the surgical fastener toward one another as the surgical fastener is expelled from the distal end of the elongate tubular member. The mechanical deforming means can include radially inwardly directed lips. [0013] This invention is further directed to a surgical fastener system including a surgical fastener having a pre-formed configuration and a formed configuration, the preformed configuration including a pair of legs and an arcuate cross-member interconnecting proximal ends of the legs and a surgical fastener applier including a housing having a reciprocating mechanism adapted for advancing the surgical fastener, an elongate tubular portion extending from the housing and having a bore therethrough, a jacket disposed within the bore and fixed to the elongate tubular portion, the jacket having an inner surface defining a longitudinally extending main channel extending therethrough and including a pair of longitudinally extending sub channels formed along the inner surface, each of the sub channels being configured and adapted to receive at least a portion of a respective one of a pair of legs of the surgical fastener in the pre-formed configuration therein, and a rotatable drive rod operatively coupled to the reciprocating mechanism and extending axially through the main channel of the jacket, the drive rod including a helical thread extending longitudinally along a length thereof, the helical thread defining a groove therein, the groove being adapted to receive the arcuate cross-member of the surgical fastener therein and, by rotating, to advance the surgical fastener distally through the tubular portion, the surgical fastener exiting the distal end of the tubular portion in the formed configuration. The drive rod can be adapted to receive a plurality of the surgical fasteners in the pre-formed configuration. The drive rod can be releasably attached to the reciprocating mechanism. The surgical fastener applier can be adapted and configured for releasably receiving a cassette, where the cassette can include a quantity of the surgical fasteners in the pre-formed configuration. The reciprocating mechanism may be a trigger pivotably coupled to the housing. The applier can have a distal end and a mechanical deforming means disposed at the distal end of the applier. [0014] This invention is also directed to a surgical fastener applier including a housing, an elongate tubular portion having a proximal end and a distal end, the tubular portion having an elongate channel, the channel having an inner surface and a pair of longitudinally extending sub channels formed into and along the inner surface, each of the sub channels being adapted to receive at least a portion of a respective one of the legs of the surgical fastener therein, a rotatable drive rod having a proximal end and a distal end, the drive rod extending axially through the main channel, the drive rod including a longitudinally extending helical thread, the helical thread defining a groove that is adapted to receive the arcuate cross-member of the surgical fastener therein, and a mechanism operatively connected to the drive rod for rotating the drive rod to drive fasteners legs first from the distal end of the drive rod and from the distal end of the tubular portion. The pair of sub channels of the jacket can be diametrically opposed. The main channel can include a plurality of pairs of sub channels formed along the inner surface thereof, wherein each pair of sub channels can be at least less than 180 degrees apart from one another. The mechanism may include a trigger pivotably coupled to the surgical applier. The applier can include a mechanical deforming means operatively coupled to a distal end of the elongate tubular portion where the deforming means can be adapted to deflect the pair of legs of the surgical fastener toward one another as the surgical fastener is expelled from the distal end of the elongate tubular member. The mechanical deforming means can include radially inwardly directed lips. [0015] It is an object of the present disclosure to provide a surgical tack that overcomes drawbacks of prior art surgical tacks. [0016] It is an object of the present disclosure to provide a surgical tack which secures a surgical mesh to underlying body tissue and which is removable without damaging tissue. [0017] It is another object of the present disclosure to provide a surgical tack with a low profile for substantially flush contact with the surface of the surgical mesh after installation. [0018] It is another object of the present disclosure to provide a surgical tack applier that is adapted to apply the surgical tacks of the present disclosure to an operative site. [0019] It is another object of the present disclosure to provide a surgical tack applier that is adapted to prevent rotation of a surgical tack as it is being expelled from the applier. [0020] It is another object of the present disclosure to provide a tack that can be easily removed from tissue to which it has been applied. [0021] These objects, together with other objects of the disclosure, are met by the tack and tack applier described, shown, and claimed herein. Continue reading... Full patent description for Tack and tack applier Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Tack and tack applier patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Tack and tack applier or other areas of interest. ### Previous Patent Application: Apparatus and methods for treating tissue Next Patent Application: Method for stapling tissue Industry Class: Surgery ### FreshPatents.com Support Thank you for viewing the Tack and tack applier patent info. 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