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Flashcards in Local flaps of head and neck Deck (13)
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1
Q

What are advantages to using local flaps in the head and neck

A

color match

texture match

2
Q

What are 2 biomechanical properties of skin that affect the planning of local flaps?

A

Stress relaxation

Creep

3
Q

What is stress relaxation property of skin

A

With constant load is applied, the skin stretches. With time, the amount of force needed to maintain the stretched position reduces

4
Q

What is creep property of skin?

A

With sudden load applied to skin and kept constant, the amount of stretch increases over time

5
Q

What are the angles for deisngining a rhomboid

A

120 and 60

4 potential flaps can be designed per defect

6
Q

How can a circular defect be closed with a rhomboid?

A

transform into hexagonal shape

6 potential rhomboid flaps exist

3 flaps are needed to close hexagonal defect

7
Q

What are the angles of a dufourmental flap?

A

150 30

8
Q

What are indications for a Z-plasty?

A
  • realign scar with line of minimal tension
  • adjust contours with re-orienting soft tissue
  • lenghthen a scar contracture
  • disperse linear scars
9
Q

What is the classic angle of a zplasty

A

60’

10
Q

What increase in length is achieved for varying angles of zplasty?

A
  • Zplasty angle -> %increase in length
  • 30 -> 25%
  • 45’ -> 50%
  • 60’ -> 75%
  • 75’ ->100%
  • 90’ ->120%
11
Q

How do you increase length of flaps on forehead and scalp

A

galea scoring at itnerval of 0.5cm to 1cm

12
Q

Where od you place your incision lines for flap reconstruction in the head and neck?

A

in the lines of minimal relaxed tension

13
Q

what are the tension properties of skin and the elastic properties of skin

A