Needle Shape

Point Type

Symbol

Round Bodied

Curved Cutting

Reverse Cutting

Reverse Cutting Prime

Taper Cutting

Reverse Cutting Precision Point

Micro-point Spatula Curved

CSU Spatula

SBR Spatula

 

Needle Curvature

 

Suture Materials

 

Needle Shapes (Curvature)

1/4 CIRCLE

CURVED 3/8 CIRCLE

 

1/2 CIRCLE

5/8 CIRCLE

 

J-SHAPED

SKI (1/2 CIRCLE)

 

STRAIGHT

 

 

 

Daps Tech Co.  has a wide variety of needles suitable for every surgical application nas required.

Needle Type (Point and Body)

 

Needles having a taper point which gradually tapers to a round body. These needles are designed for soft tissue closure. The flattened body of the needle enables better grip to be obtained with the needle holder.


 

These are conventional cutting needles of triangular cross section but the apex of the triangle on the inside curvature of the needle. These needles are used for cutting through tough tissues. The triangular section is taken along the length of the needle to ensure excellent cutting strength throughout the needle length.


 

Needles have a triangular cross section which are used for cutting through tough tissue. These needles have three cutting edges with apex of triangular cross section on the out side curvature of the needle. The triangular section is taken along the length of the needle to ensure excellent cutting strength through out the needle length.


 

These are newly introduce needles primarily for Cosmetic Surgeries. Their special body designed and their sharper cutting edges enables a better penetration of the muscle layers.


 

Needles of circular cross section but having a Cutting Point. Since the cutting point remains within the original wire diameter of the needle, minimal trauma and good penetration are obtained. the body of the needle is flattened to enable a better grip to be obtained with the needle holder.


 

Needles with circular cross section but having the point with four edges giving excellent penetration. The body of the needle is flattened to enable a better grip to be obtained with the needle holder.


 

Needles with circular cross section but having a Cut Taper point. the cut taper is formed by grinding three short cutting edges on a taper point needle. Since the cut taper remains within the original wire diameter of the needle, minimal trauma and good penetration are obtained.


 

Needles with circular cross section but having a Blunt Point that does not cut through the tissue. The body of the needle is flattened to enable a better grip to be obtained with the needle holder.


 

Needles that are flat on the inside & outside curvature to enable ease of penetration between scleral or corneal tissue. these are used in ophthalmology.


 

These are Squared Bodied needles primarily intended for cardiovascular applications. The square bodied geometry combined with the newly improved 300 series steel alloy significantly improves the bending resistance of these needles. The flattened body of the needle is enable a better grip to be obtained with the needle holder.

 


Tolerances

Needle Length
0” to .499” ± .015” (.38mm)
.5” to .999” ± .030” (.76mm)
1” to 1.999” ± .045” (1.14mm)
2” and larger ± .060” (1.52mm)

Needle Radius
0” to .999” ± .015” (.38mm)
1” and larger ± .030” (.76mm)

Wire Diameter (Note: as measured on round barrel at hole end of needle)
Nominal wire diameter ± .0005” (.0127mm)

 

Tests

Flexibility Test:

The needles conform to the general requirements for suture needles as specified in

 IS: 9165-1992  ( Force gms , Residual set permanent )

Point sharpness ( membrane piercing force in gms ) The tests done include point sharpness testing, which is carried out on a specially designed digital sharpness comparator, which measures the force (in grams) required for penetrating of the needle point through a special polyurethane diaphragm. The polyurethane material is selected as it closely mimics the characteristics of human skin.

Stiffness:

The stiffness of the needles is also measured with a special digital tester, which enables the force Vs displacement of the needle to be plotted and which also determines whether the needle has regained its original shape without any permanent set having taken place.

Corrosion Resistance:

is tested in accordance with IS 7135-1998, IS-7531-1990, and in US Federal specification GGN 211b.   AndThe German (draft) standard DIN: 13170

Ductility

is evaluated by bending the needle body through a sharp 90 degree angle, which it should withstand without cracking.

Hardness measurement

is done on a micro-Vickers hardness tester, which measures the dimension of the indentation made with a diamond pyramidal indenter which is applied to the polished surface of the needle with a pre-determined force.

Random samples of a traumatic needles' are drawn and test-attached with a suture after which they are subjected to pull-out strength testing in a digital tensilometer to ensure that USP standards are met.

The needles are polished to minimize micro asperities on the surface by a series of mechanical polishing operations followed by electro-polishing. This reduces tissue drag during suturing operation to a minimum.

The surgical suture needles are manufactured from Martens tic grade of stainless steel conforming to medical grade specification. The material conforms to AISI 304 to 470, equivalent to EN 56D or JIS SUS 420 J2, as well DIN erkstofnummer 1.4031.

The needles are hardened and tempered to a controlled hardness of VPN 525
to 625 ensuring adequate stiffness and eliminating brittleness to withstand the suturing pressure.