Several Shapes Of Surgical Needles
Oct 31, 2015
There are several shapes of surgical needles. These include:
Straight
1/4 circle
3/8 circle
1/2 circle. Subtypes of this needle shape include, from larger to smaller size, CT, CT-1, CT-2 and CT-3.
5/8 circle
compound curve
half curved (also known as ski)
half curved at both ends of a straight segment (also known as canoe)
The ski and canoe needle design allows curved needles to be straight enough to be used in laparoscopic surgery, where instruments are inserted into the abdominal cavity through narrow cannulas.
Needles may also be classified by their point geometry; examples include:
taper (needle body is round and tapers smoothly to a point)
cutting (needle body is triangular and has a sharpened cutting edge on the inside curve)
reverse cutting (cutting edge on the outside)
trocar point or tapercut (needle body is round and tapered, but ends in a small triangular cutting point)
blunt points for sewing friable tissues
side cutting or spatula points (flat on top and bottom with a cutting edge along the front to one side) for eye surgery
Finally, atraumatic needles may be permanently swaged to the suture or may be designed to come off the suture with a sharp straight tug. These "pop-offs" are commonly used for interrupted sutures, where each suture is only passed once and then tied.
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