Mechanism

Needle-Suture Coupling

The mechanism of the needle attaching suture material is refined to leverage the inherent structure and configuration of the overhand knot. The knot acts as a stopper to safely secure suture material to the needle. Essential parts of the needle 1, 2, and 3, as shown on page four (4) of the catalogue, which is downloadable below, demonstrate how the needle interacts with parts of the suture knots 4, 5, and 6. 

Top view

FEATURES OF THE NEEDLE
The groove effectively hides 63-100% of the knot hence reducing or completely eliminating tissue interruption by the knot.
Left and right wall of the groove exert pressure on the knot preventing it from unravelling.
The base of the groove mimics the interior curvature of a cylinder. Once the suture material is applied to the needle the incline of the base aligns with the angular displacement of the overhand knot. The base knot interface stabilises the needle-suture attachment.
Drilled end provides for suture to emerge directly from the end of the needle thereby ensuring that only a single strand is pulled through tissues.
After suturing is done, the needle can be unthreaded by hooking the knot out of the groove.
FEATURES OF THE KNOT
An overhead knot is made of a single strand of suture looped over itself to create a simple knot with a twist, a working end and a standing end.
The overhead knot is an effective stopper, however to keep it firmly secured inside the groove and to avoid looping, the knot must be placed into the groove correctly as shown in threading instructions step 3
Correct threading can be verified by observing that the twist of the knot is placed on the right hand side of the groove.
Overhead knot always adopts a title orientation along the strand, the needle design harness this feature to stabalize suture fixation.
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