Suture collet

Details Suture collet Suture collet

1998-08-31

2001-03-13

Jackson, Gary (Department: 3731)

Surgery

Instruments

Suture retaining means

Reexamination Certificate

active

06200329

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to suture fastening.
One traditional method of fastening suture is simply by tying a knot in the suture. Alternatively, a suture clamp may be used. In a typical suture clamp, the suture is positioned between an open pair of arms which are then pivoted closed to capture the suture between them.
SUMMARY OF THE INVENTION
A suture securing device includes an inner member defining a suture receiving passage extending between a distal end surface of the inner member and a second surface of the inner member. An outer member defines an opening for receiving the inner member such that suture extending from the second surface is secured between the inner member and the outer member.
Embodiments of this aspect of the invention may include one or more of the following features.
The second surface is a proximal end surface of the inner member. The inner member has a slot extending between an outer surface of the inner member and the suture receiving passage. A region of the inner member has an outer diameter greater than the diameter of the outer member bore. The inner member is cylindrical.
Preferably, the outer member bore extends axially from a proximal end to a distal end of the outer member. The outer member bore tapers distally from a smaller diameter to a larger diameter. The outer member is cylindrical.
According to another aspect of the invention, a suture securing cartridge includes a sleeve having an axial bore and a suture securing device disposed in the bore. The suture securing device includes an inner member defining a suture receiving passage, and an outer member disposed in the bore proximally of the inner member and configured for advancement over the inner member.
Embodiments of this aspect of the invention may include one or more of the following features.
The sleeve includes two suture threading slots extending proximally from a distal end of the sleeve. One of the slots terminates distally of the other slot. At least a portion of the slots extend along a longitudinal axis of the sleeve. The sleeve has a distal clamp for selectively preventing the inner member from exiting the sleeve bore in a distal direction. The clamp is resilient to permit the inner member to exit the bore in the distal direction.
According to another aspect of the invention, a suturing apparatus includes a suture securing cartridge and a drive tool. The drive tool includes an outer sheath which fits over the cartridge sleeve, an intermediate tube which engages the sleeve to secure the cartridge to the drive tool, and a movable element located within the intermediate tube for advancing the outer member over the inner member.
Embodiments of this aspect of the invention may include the sleeve having a circumferential groove in the bore, and the intermediate tube has a grasper which engages the groove to secure the cartridge to the drive tool.
According to another aspect of the invention, a method of securing a suture includes threading a suture through a passage in an inner member. The passage extends between a distal end surface of the inner member and a second surface of the inner member. An outer member is advanced over the inner member such that suture extending from the second surface is secured between the inner member and the outer member.
Embodiments of this aspect of the invention may include one or more of the following features.
Threading includes threading the suture in a proximal direction, and advancing the outer member over the inner member to cause the suture to double back in a distal direction. A first suture strand is passed through a first suture threading slot in a sleeve containing the inner member and the outer member, and through a slot in the inner member to the passage. An outer sheath is advanced over the sleeve to at least partially cover the first suture threading slot.
Preferably, a second suture strand is passed through a second suture threading slot in the sleeve, and through a slot in the inner member to the passage. The outer sheath is advanced over the sleeve to at least partially cover the second suture threading slot.
After advancing the outer member over the inner member, the inner and outer members are expelled from a sleeve containing the members.
According to another aspect of the invention, a method of using a suture securing device includes providing a preassembled suture securing cartridge including a sleeve having an axial bore and a suture securing device. The preassembled cartridge is inserted into a drive tool that includes an outer sheath which fits over the sleeve, an intermediate tube which engages the sleeve to secure the cartridge to the drive tool, and a movable element located within the intermediate tube. The movable element is advanced to advance the outer member over the inner member.
Embodiments of this aspect of the invention may include, after advancing the outer member over the inner member, expelling the inner member and the outer member from the sleeve.
We have found that the holding power of the suture securing device is substantially greater than that of a standard open surgical knot. The suture securing device also enables the surgeon to advance the suture securing device into the body to the site of the tissue being sutured and then position the suture within the suture securing device at the surgical site.
Other features and advantages of the invention will be apparent from the following detailed description, and from the claims.


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