SPD Chapter 14

Two types of Stainless steel are

300 series (molybdenum is added) and 400 series ( Vanadium is added)

Catgut

A natural substance used for internal stitching, is absorbed and dissolved by the body.

Passivation is: (Passivation layer)

A process that places a protective coating (Chromium oxide) on all surfaces of the instrument to protect against corrosion

Super -sharp scissors require special sharpening technique and can be identified by:

Black coating on the ring handles of the scissors

Shiny, mirror finishes are most:

Durable and longer life than other finishes

Two types of instrument finishes not passivated are:

Ebonized & Titanium

Tungsten Carbide insert scissors require sharpening

Every 3 years

Super sharp scissors require sharpening

Every 3-4 months

Stainless steel scissors require sharpening:

Every year

Surgical Instruments have two names based on:

Function/use of the instrument and Place of origin or surgeons /manufacturers that invented the instrument.

Instruments with tungsten carbide inserts have :

Gold Ring Handles and also called "Diamond Jaw"(needle holders, scissors, and thumb forceps)

Four broad general categories of surgical instruments

Hand Held; Endoscopic; Laser & Power equipment

Two basic types of retractors:

Hand-held and self-retaining

Scissors are made with a special precision known as:

Helix curve

Stainless steel is made from:

Iron-gives instr. its strength and shape, Carbon-adds hardness and Chromium-gives resistance to corrosion.

Laser is an acronym for:

Light Amplification by the Stimulated Emission of Radiation

Surgical instruments are available in five finishes:

Shiny/Mirror; Satin/Patina; Dull/Matte; Ebonized or Titanium

Instruments are manufactured from the following materials:

Stainless steel, Aluminum, Brass, Chrome, Copper, Nickel, Silver, Titanium, Tungsten Carbide.

Two grades of instrument

Surgical grade and Floor grade

Dull/Satin often preferred by doctors but are:

least durable, and most prone to pitting, spotting, staining and corrosion

Titanium Scissors

may never need sharpening or very rarely