Surgical Needles

1
Surgical Needles
2
Surgical Needles

• To use a Surgical Suture for approximation, a
  Needle is a must.
• A needle with a hole,(called the eye) at the
  opposite end of the sharp point may be used for
  the surgery.
• This is called the Eyed needle

3
Surgical Needles

• .

4
Surgical Needles

• .

5
Surgical Needles

• .

Why these are called traumatic sutures?
6
Surgical Needles

• .

• Surgical Sutures with needles attached to it are
• referred to as eyeless needled sutures or
  more
• commonly a-traumatic sutures.

Needle
Suture
7
Surgical Needles

• .

• Features benefits of an eyeless needled suture
• Sharp Sterile New Needle each time for the
  surgery.
• Ready for immediate use.
• Saves invaluable time.
• No unthreading during surgery.
• Less tissue damage as single suture strand passes
  through the tissue.
• The gap made by the needle is fully plugged by
  the diameter of the suture strand.
• Chances of leakage from the suture line
  remote.

8
Surgical Needles

• .

Usage of Atraumatic Suture
9
Surgical Needles

• .

.
Needle
Area of Step Down (from the needle) Step Up
(from the suture)
Suture
10
Needle Structure

• Point
• Portion from the tip to the maximum cross section
  of the body
• Body
• It forms the majority of the needle length.
• Important interaction with needle holder and
  ability to transmit penetrating force
• Swage

11
Surgical Needles

• .

• Swaging
• The objective of this procedure is the attach
  the
• needle to the suture in such a manner that
• The needle becomes an integrated part of the
  stitching system
• The step up / step down at the point of
  attachment is minimum
• The gap generated in the tissue by passage of the
  needle end should totally be filled up by the
  suture diameter.
• The point of transition between the metal and
  fiber is smooth
• The tissue drag is reduced to a minimum
• The attachment should be strong enough to
  withstand the tension of suture pull

12
Surgical Needles

• .

Before the start of the swaging process, the
strands are visually inspected for defects.
13
Surgical Needles

• .

Swaging
14
Surgical Needles

• .

Swaging under the microscope
15
Surgical Needles
.

• .

Swaged Eyeless Needled Sutures
16
Surgical Needles

• .

Under no circumstances can the needle
get detached from the suture as this is
absolutely totally unwarranted for the
surgeon. We have to bear in mind, our First
battle would be won or lost at this point
17
Surgical Needles

• .

• Two types of needles are commonly available in
• the industry
• A) Drilled needles (more common)
• Eyeless needles with a hole drilled at the suture
  attachment end.
• They may be mechanically drilled or Laser
  drilled.
• Glue treated Suture material placed inside the
  hole and crimped.
• B) Channel needles
• The attachment point of the needle is left flat
  and open.
• Glue treated Suture material is placed inside
  then enclosed crimped by closing the flaps.

18
Surgical Needles

• .

Diagram of a drilled needle
Diagram of a channel needle
19
Surgical Needles
Shapes (Curvature)
20
Surgical Needles
Straight

• Preferred when tissue is easily accessible
• Designed to be finger held on or near the surface
• Useful for skin closure, Micro surgery- Nerve and
  vessel repair

21
Surgical Needles

• The curvature of the needle determines the depth
  of its bite.
• Curved needles are used due to quick needle
  turnout from tissue.

22
Surgical Needles - Shape

• .

1/4th Circle
23
Surgical Needles ShapeI/4 Circle

• Has shallow curvature
• Typically used on easily accessible convex
  surfaces
• Ophthalmic and Microsurgical procedures

24
Surgical Needles - Shape
3/8th Circle
25
Surgical Needles Shape3/8 Circle

• Most commonly used curved needle
• Can easily be manipulated in large and
  superficial wounds
• But are awkward or impossible to use in deep
  cavities due to large arc of manipulation needed-
  eg. pelvis

26
Surgical Needles - Shape

• .

1/2 Circle
27
Surgical Needles Shape1/2 Circle

• For use in confined locations
• Requires more pronation and supination of wrists

28
Surgical Needles - Shape

• .

5/8th Circle
29
Surgical Needles Shape5/8 Circle

• Ideal for deep, confined holes
• Can be used by rotating the wrist with little or
  no lateral movement.

30
Surgical Needles- Types
31
Surgical Needles - Types

• Round Body Needle

Sharp Point
Blunt Point
32
Surgical Needles TypesRound Bodied Blunt

• Pierces and spreads the tissue without cutting
• Used in easily penetrated tissues like
  Peritoneum, abdominal viscera etc
• Used in internal anstomosis to prevent leakage
• Blunt needles are used to dissect through friable
  tissue liver kidney

33
Surgical Needles - Types

• Cutting Needles

Cutting Edges
Reverse
Conventional
34
Surgical Needles TypesConventional Cutting

• Has three cutting edges
• For use to cut through tough difficult to
  penetrate tissue
• Ideal for skin sutures

35
Surgical Needles TypesReverse Cutting

• Ideal for tough tissue like skin, tendon sheath
  or oral mucosa
• Has more strength than conventional cutting
  needles.
• Has reduced risk of cutting out tissue
• Used in ophthalmic and cosmetic surgery- minimal
  trauma

36
Surgical Needles - Types

• .

Cutting Edges
Slim Blade Cutting
Trocar Point
37
Surgical Needles- Types
38
Surgical Needles
Size
39
Surgical Needles