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Atraumatic Cardiovascular Needles
Atraumatic Cardiovascular Needles
SMB Cardiovascular suture
needles meet the highest standards of modern surgery. Our supplier’s
years of experience as a needle manufacturer and continuous technical
development have resulted in the development of needles, which combine
outstanding quality with functionality. As a result of continual
development we offer a product, which combines a high strength needle
with a finely honed and extra sharp point.
SMB Cardiovascular needles are made from special maraging steel conforming to ‘Custom 455’, & Custom 470 duly age-hardened to around VPN 580 to 650 so as to give optimum strength & ductility after heat treatment. This grade of steel offers much greater strength and resistance to bending as compared with austenitic or martensitic grades of steel.
The stiffness of the cardiovascular taper point needles is enhanced through either a ribbed body or a square cross section. The square cross section design provides for a greater moment of inertia to increase the resistance to bending.This increases resistance to breaking and reduces incidence of bending during penetration. Stiffness is objectively evaluated on a digital stiffness tester, which measures the force in grams for producing a given deformation of the needle.
The cardiovascular needles are designed with a lower needle-to-suture diameter ratio to reduce risk of leakage at the needle tract during anastamosis.The cardiovascular needles have a long taper ratio point, with superior penetration characteristics and reduced tissue drag.
These maraging steel needles have superior cutting edge retention because of the higher hardness of the needle.
All cardiovascular needles are siliconised using Dow Corning silicone grade MDX 4-4159, duly cured. The silicone coating considerably reduces tissue drag and enhances point durability. Needle sharpness is retained over the duration of the surgical procedure resulting in consistent penetration, pass after pass.
The Sharpness of the cardiovascular needle point is measured on a specially developed sharpness comparator, which measures the actual penetration force required for the needle point to pierce a polyurethane film, which closely mimics human skin.
Our cardiovascular needles have been benchmarked against similar needles from other companies including B.Braun, Ethicon, Tyco-D&G, etc and score comparably in terms of (a) initial point sharpness; (b) retention of point sharpness; and (c) stiffness.
It may be mentioned that these cardiovascular needles are being exported to Germany, USA and to many countries in Latin America. The quality of these needles has been widely appreciated.
SMB Cardiovascular needles are made from special maraging steel conforming to ‘Custom 455’, & Custom 470 duly age-hardened to around VPN 580 to 650 so as to give optimum strength & ductility after heat treatment. This grade of steel offers much greater strength and resistance to bending as compared with austenitic or martensitic grades of steel.
The stiffness of the cardiovascular taper point needles is enhanced through either a ribbed body or a square cross section. The square cross section design provides for a greater moment of inertia to increase the resistance to bending.This increases resistance to breaking and reduces incidence of bending during penetration. Stiffness is objectively evaluated on a digital stiffness tester, which measures the force in grams for producing a given deformation of the needle.
The cardiovascular needles are designed with a lower needle-to-suture diameter ratio to reduce risk of leakage at the needle tract during anastamosis.The cardiovascular needles have a long taper ratio point, with superior penetration characteristics and reduced tissue drag.
These maraging steel needles have superior cutting edge retention because of the higher hardness of the needle.
All cardiovascular needles are siliconised using Dow Corning silicone grade MDX 4-4159, duly cured. The silicone coating considerably reduces tissue drag and enhances point durability. Needle sharpness is retained over the duration of the surgical procedure resulting in consistent penetration, pass after pass.
The Sharpness of the cardiovascular needle point is measured on a specially developed sharpness comparator, which measures the actual penetration force required for the needle point to pierce a polyurethane film, which closely mimics human skin.
Our cardiovascular needles have been benchmarked against similar needles from other companies including B.Braun, Ethicon, Tyco-D&G, etc and score comparably in terms of (a) initial point sharpness; (b) retention of point sharpness; and (c) stiffness.
It may be mentioned that these cardiovascular needles are being exported to Germany, USA and to many countries in Latin America. The quality of these needles has been widely appreciated.
Atraumatic drilled –end type Needles
This type of needle is another
version of atraumatic needles. Instead of a channel being forged at one
end of the needle and then crimped over the suture placed in it, a fine
blind hole is drilled into one end of the needle blank; the suture is
inserted into this hole and then crimped inside it to form the
attachment. This type of needle is said to cause the least trauma.
We offer special features in their drilled-end needles, which make these superior to most other makes available in the market. These are highlighted below:
We offer special features in their drilled-end needles, which make these superior to most other makes available in the market. These are highlighted below:
- The needles are made from non-free cutting grade of the stainless steel, which has ductility and corrosion resistance superior to the free cutting grade which most manufacturers use.
- Our drilled end is not annealed as is done by most manufacturers.
The advantages of the drilled end being hardened are:
- The corrosion resistance of the needle is unimpaired.
- There is no potential loss of stiffness of the needle due to imprecise annealing.
- The grip on the suture obtained after swaging is better. Though this requires a higher swaging force, the attaching strength obtained is higher than with annealed end needles.
- Drilled-end needles are made with a funnel shaped counter bore - this not only facilitates insertion of the suture during attachment but also prevents “cut-through” of the suture during the swaging operation.
- The outer edge of the drilled hole on the needles is chamfered, thus eliminating any sharp edges after attachment with the suture.
MICRO SUTURE NEEDLES
Micro needles meet the highest
standards of modern micro surgery. Years of experience as a needle
manufacturer and continuous technical development have resulted in our
bringing out a product range of ophthalmic needles which combine
outstanding quality with functionality. As a result of this process of
continual development, we offer a product which combines a high strength
needle with a finely honed and extra sharp point.
- Micro needles are made from special quality maraging steel conforming to, ‘Custom 455, Custom 465 & Custom 470 ’, duly age hardened to around VPN 570 to 600 so as to give optimum strength & ductility after heat-treatment.
- Stiffness of the spatulated and taper point needles is enhanced through square flattening. Stiffness is objectively evaluated on a digital stiffness tester.
- The spatulated needles have a cross ground point, with superior penetration characteristics.
- These maraging steel needles have superior cutting edge retention.
- Guarantee low penetration force and minimum trauma through precise control of point geometry. The sharpness of the needle point is measured on a specially developed sharpness comparator, which measures the actual penetration force required for the needle point to pierce a polyurethane film which closely mimics human skin.
- We offer micro needles as below:
- Micro needles in channel type wire diameter 0.15 mm to 0.27 mm.
- Micro needle in drilled end type wire diameter o.28 mm and above.
- are available in several variations e.g.
- square-flattened needles with spatulated or taper point
- triangular needles with reverse cutting point.
- 'Slim blade' micro-needles with cutting edge point.
Quality Control Protocol
The needles conform to the
general requirements for suture needles as specified in IS: 9165-1992
and also conform to the corrosion resistance requirements as per IS:
7531-1990.
A strict Quality Control protocol is followed at each stage of manufacture. 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.
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 and other international standards.
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 indentor which is applied to the polished surface of the needle with a pre-determined force.
Random samples of atraumatic 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.
A strict Quality Control protocol is followed at each stage of manufacture. 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.
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 and other international standards.
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 indentor which is applied to the polished surface of the needle with a pre-determined force.
Random samples of atraumatic 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.
