外科手术打结的手册.pdf

Basic Principles of Surgical Knots Lia Assumpcao Dep. Of Surgery-SOM-JHH SFE Course 07/14/08 1 Introduction 2 Introduction ? Knot Security ? Extensibility relates to the way in which the suture will stretch slightly during knot tying and then recover 3 Types of Suture ? Multifilament: high coefficient of friction and the knots remain as they are laid down ? Monofilament: low coefficient of friction, resulting in a greater tendency for the knot to loosen after it has been tied, in addition, possess the property of memory 4 Types of Knots ? Simple Knot: incomplete basic unit ? Square Knot: completed common knot ? Surgeon’s or Friction Knot: completed tension knot 5 Simple Knot ? Details about this topic ? Supporting information and examples ? How it relates to your audience 6 Square Knot ? Not secure as a bend. Spills easily if one of the free ends is pulled outward ? Does not hold well if the two lines are not the same thickness 7 Square Knot :Two Hand Technique ? White strand placed over extended index finger of left hand acting as bridge, and held in palm of left hand ? Purple strand held in right hand ? Purple strand held in right hand brought between left thumb and index finger 8 Square Knot :Two Hand Technique ? Left hand turned inward by pronation, and thumb swung under white strand to form the first loop. ? Purple strand crossed over white and held between thumb and index finger of left hand. 9 Square Knot :Two Hand Techniq