local flaps
TRANSCRIPT
Local Flaps used in Head & Neck Reconstruction
Local flaps
Dr V.RAMKUMAR CONSULTANT DENTAL&FACIOMAXILLARY
SURGEON REG NO:4118-TAMILNADU-INDIA(ASIA)
Principles techniques of wound closure (reconstructive ladder)
What is ……
Flap: In its basic form is a tongue of tissue consisting of the entire thickness of skin and variable amount of subcutaneous tissue, which is transferred from one site to another.
(McGregor)
Local / Regional flaps – Goals (Kinnerw & Jeter)
1. Adequate color match2. Adequate thickness – avoid protrusions or
deficiencies3. Preservation of clinically perceivable
sensory innervation4. Sufficient laxity – avoid retraction or
deranged function5. Resultant suture lines of either primary or
secondary defects are restricted to anatomic units and fall within natural skin lines.
Delay of Flap: surgical outlining - before actual transfer -improve circulation.
(1- 2 weeks)
2 basic schools1. Delay improves nutrient blood flow2. Delay increases the tolerance of the
cells to ischemia, allowing them to survive at a lower flow rate.
Planning in Reverse : used when a local flaps jumps over skin and in distant flaps.
( a piece of fabric to represent it the flap is taken in reverse through various stages of the mock transfer to ensure that the real flap is large enough and long enough to reach its destination without kinking or undue tension at any stage of transfer)
1. Based on movement Local flaps:
Advancement (single / bipedicle, V-Y)Pivotal : Rotation
Transposition Interpolation
Distant flapsDirect TubeMicrovascular (free)
Classification of flaps
Local Flap:
skin flap taken from an area close to the wound.
E.g. a wound on the lip may be repaired by a flap from the adjacent cheek.
Regional Flap:
skin flap is not from the adjacent area, but is from the same region of the body.
E.g. a wound on the tip of nose might be repaired with a flap from the forehead.
- When a flap is from a different part of the body.
- Any flap taken from below the lower border of the mandible is considered a distant flap.
A local flap repair is usually done in one operation, whereas regional and distant flaps need two or more operations.
Distant Flap:
Free Flap:
This is a distant flap, but the whole procedure is done in one stage by repairing the donor and recipient blood vessels by microsurgery.
2. Based on blood supply:
Axial Random
Daniel (1973) blood supply to skin:
Musculocutaneous arteriesrandom arteriesmyocutaneous
Septocutaneous arteriesfasciocutaneous arterial
Septocutaneous arteries
Musculocutaneous system: Vascular system penetrating the underlying muscles and then continues to supply the skin.
Random cutaneous: it is composed of skin and subcutaneous fat with multiple musculocutaneous arteries at the base.
Myocutaneous flap: it is composed of skin, subcutaneous fat and muscle with its blood supply coming from muscular arteries plus numerous terminal musculocutaneous arteries.
Septocutaneous system: vascular system reaching the skin through septa between muscles. (groin & DP flaps)
3. Based on composition
Skin (cutaneous)Visceral ( colon, omentum)Muscle Mucosal
CompositeFasciocutaneous Myocutaneous Osseocutaneous Tendocutaneous Sensory/innervated flaps Osseo-myo-cutaneous
Type I: one vascular pedicleType II: dominant pedicle (s) + minor pediclesType III: two dominant pediclesType IV: Segmental vascular pediclesType V: dominant pedicle + secondary segmental pedicles
Based on vascular pedicle typesIn muscles
Mathes and Nahai (1979)
Areas of skin availability exploited most commonly for facial local flap transfer
Palpation & PINCH Test
Advancement flaps
flap moves in a straight path without any lateral movement into the primary defect.(Burrows Triangle’s)
sites – forehead, brow, cheek.
Single advancement flap:movement is entirely in one direction.
Bilateral advancement flap:
When large tissue is required.Same technique & principle.
used: forehead, mustache area
and posterior neck.
variant of bilateral advancement flap
Useful fordefects at the periphery of the face around the nasal ala and upper lip
dog–ear almost always forms Disadvantages:number of scars- created with the three limbs and Burow’s triangle and with the three point closure
A to T flap:
V-y advancement flap: (Herbert flap)
A V shaped flap is moved into a defect with primary closure of the donor area leaving a final Y shaped suture line.
It is pedicled from the underlying subcutaneous tissue rather than the surrounding skin.
Ideal for Lesion in the cheek and alar base
Variation of advancement flap
cover those areas on the face where there are anatomical structures on one side of the defect that should not be pulled or stretched.
repair of upper lip or over the lateral eyebrow,
Point C moves to point B & point D moves to point F
Burow’s triangular flap
Panthographic expansion:
variation of the advancement
instead of the flap being advanced as a rectangle, the limbs of the flap are designed at 120º with back cuts at the bottom so that it looks like an inverted tumbler.
The flap is then advanced so that the donor site closes primarily. This technique is particularly useful on the cheek and neck.
Pivot flaps:
Derives its name from the pivot point at the base of the flap as well as its arc of rotation .
When flap moves laterally into the primary defect - transposition flap
when it is rotated into the defect - rotation flap
isosceles triangle- triangulation of the defect
Pivot point
Is the axis around which the transfer takes place. Flap is designed so that the distance from the pivot point to each part of the flap before transfer is atleast equal to the distance to be expected after
transfer
pivot point is on the side of the flap away from the direction of movement of the flap.
Rotation flaps: it is semicircular flap that rotates about a pivot point to fill the defect.
Place the arc closest to the defect higher than the defect itself, to reach the most distal point of the defect
Should be 5-8 times the width of the defect
Simple rotation flap
Ideally suited on a convex surfacecheekSubmandibular area
Bilateral rotation flap
Classic form - a rectangle or near square which is raised and moved laterally into a triangular defect
In a correctly designed flap, the distance from the pivot point to A equals the distance to B and the transfer is carried without tension
sites of choice retroauricular area submandibular area perioral area for upper and lower lip reconstructions.scalp
Transposition flaps
A
B
not to rotate more than 90º
More acute –less dog ear
Transposition flap
Methods for correction of “dog ear”
Limberg’s flap:
combination of flap rotation and transposition
Disadvantages:Excess tension
Anatomic landmark displacement because the tissue used to resurface the rhomboid defect is borrowed from single area.
Rotation pucker at Point C
Best in temple region between the eyebrows and anterior hair line
BD=DE=EFEF at angle of 60º &Parallel to one side
Limberg’s flap
Dufourmental flap:
variation of a rhomboid flap
Need not convert into 60º rhomboid
Such flaps are designed for closure of square & rectangular defects.
Adv: less closure tension
Disadv: rotation puckering at point C
Double ‘Z’ rhomboid flap: by Cuono
Advantage over Limberg flap:
Excessive tension is reduced by using two flaps
anatomic landmark displacement in minimized because tissue used to resurface the rhomboid defect is borrowed from two areas.
Rotation pucker seen with Limberg flap is avoided and the resultant scar forms an elongated ‘Z’ plasty.
Bilobed flap: First by Esser in 1918popularized by Zimany
reconstruct nasal and facial defects and even full thickness cheek defects.
Tension free closure of original and secondary defects.
90º is the optimal angle between the first and second flap
Maximum distortion occurs around the flap bases and the second donor lobe closure sites
Disadvantages: Rotation pucker
‘
modification of transposition flap
Difference between transposition and S- plasty
Proximity of the flap base to the defect. It is positioned tangential to the wound margin leaving a ‘V’ shaped flap between them.
Intermediate flap created between the flap and the defect.
First by Szymanowski
S’ plasty: Schrudder
60 degree between the flap and the defect will avoid ‘dog ear’
1/5th to 1/6th higher
½ or ¾ the defectwidth
Interpolation flaps:
An interpolation flap is from a nearby, but not immediately adjacent donor Site and transposed either above or below the intervening skin to the Recipient defect
Types:
Cutaneous: requires two stage procedure but more reliableSubcutaneous Island
Ex: Median forehead flapNasolabial flap
LOCAL FLAPSBuccal fat flap / Syssarcosis :
Masticatory space
average volume of the fat is 9.6ml (8.4 to 11.9)
cover defects of up to 4cm
blood supply from branches of facial, transverse facial and internal maxillary arteries.
epithelization within 2-3 wks
Uses:Oro-antral & oro-nasal communications
reconstruction of ablative defects of the maxilla and cheek, hard and soft palate, retro-molar and pterygo-mandibular regions, as An interpositional graft in OSMF
Advantages: Easy
Donor site complications rare Disadvantages:
Facial asymmetry is a possible complication
Buccal Pad Fat
Buccal pad of fat
First by Gersuny Eiselberg popularized in 1901
Blood supply: lingual artery
advantages: reliance on an excellent blood supply
low morbidity
Can be used in irradiated patients
Used to cover defects in cheek, floor of the mouth, soft palate and hard palate, alveolus, oroantral fistulas and vermillion and lip reconstruction
Tongue flaps
Classification of tongue flaps:
Flaps from dorsum of tonguePosteriorly based dorsal tongue flapAnteriorly based dorsal tongue flapTransverse based dorsal tongue flap
Flaps from lingual tipPerimeter flap
Unipedicle and bipedicleDorsoventrally disposed flaps
Flaps from ventral surface of tongue
Posteriorly based dorsal tongue flap
Uses:
To repair a defect of moderate size in the retromolar trigone, tonsillar fossa of the ipsilateral side
To cover a posterior mucosal defect in cheek
minimum thickness of the flap should be 8mm
Tongue flap-posterolaterally based
Anteriorly based dorsal tongue flap
Uses: to repair defects in the
anterior cheek,lip, anterior floor of the mouth, anterolateral floor of the mouth and palate
Transverse based dorsal tongue flap
to repair anterior floor of the mouth and lower lip
Perimeter flap
unipedicled or bipedicled
for repair of vermillion border of either lipUpper and lower lip reconstruction
Dorsoventrally disposed flaps
Flaps from ventral surface of tongue
Flaps reflected dorsally on a posterior base. Used for lining in upper lip reconstruction
Flaps reflected ventrally on a anterior base:Used for lining in lower lip reconstruction
cover defect on anterior floor of the mouth
Nasolabial flap:
Sushruta in 600 BCpopularized by Esser and Ganzer
reconstruction of facial skin defects of the upper lip, nose and cheek following extirpation of skin cancers.
superiorly based nasolabial flap- closure of the oro antral fistulae.
The bilateral inferiorly based nasolabial flap has utility in the reconstruction of the anterior defects of the floor of the mouth.
Defect in the anterior face, nose and upper lip, floor of the mouth OAF
Adv:It provides thin, local tissue for coverage of small defects. It may be also be deepitheliazed at the base for one stage procedure.
Disadv:Limited donor tissueFacial scarringSecond surgical procedure might me neededDifficult to use in the floor of the mouth if the patient is not edentulousTransfer of beard in male patients
Inferiorly based Superiorly based
For reconstruction in the anterior floor of the mouth
Case photos-Nasolabial flap
Forehead flap: McGregor.
Blood supply superficial temporal artery and posterior auricular artery.
Hemiforehead flap or total forehead flap
Long enough to reach any part of the ipsilateral face
Butterfly shape is used to repair of defects of the posterior tongue to allow Mobility, the other wing closing the defect in the cheek. The distal extension provides cover and seal.
The narrow flap repairs central and alveolar defects
The repair following total glossectomy should be in the form of a shield
Advantages:
Near to the oral cavityHairlessTissue is firm and holds sutures wellExcellent blood supplyThin and suitable for intraoral lining
Disadvantages:
Noticeable donor defectNeed to divide the pedicle and close the oral fistula at a second operationBleeding Flap necrosis can occur
Glabellar Flap
- Axial pattern flap- Based on supra-trochlear artery
uses:-nasal reconstruction-cheek defects
disadvantages:-donor site morbidity-limited amount of tissue
Temporalis flap:
Golovine in 1898
Temporoparietal fascia - superficial temporal artery
Temporalis muscle - anterior and posterior deep temporal br. Max. art
Type III
Uses:
Useful for obliterating skull base, maxillofacial and orbital defects.
It is also used in cranialisation procedure Reanimation of the face Used to close CSF leaks & dural tears
secondary to trauma & cancer surgeries. Used for midface augmentation for
hypoplasia secondary to trauma & congenital anomalies.
Advantages: Close to the oral cavity Good arc of rotation Reliable and well tolerated Thin flap Problems from the loss of muscle function
are minimalDisadvantages: Cosmetic deformity in donor site Traction paresis of Facial nerve
Temporalis flap
Uses:Useful for obliterating skull base, maxillofacial and orbital defects. It is also used in cranialisation procedureReanimation of the face
Advantages:Close to the oral cavityGood arc of rotationReliable and well toleratedThin flap
Disadvantages:Cosmetic deformity in donor siteFacial nerve paresis
Narayanan bilobed flap
•Ideal for Aged patient
•Defects of 4x4 to 6x7 cm.
•based laterally
•It involves lower cheek and upper neck
•useful, well tolerated flap for closing cheek defects with or without an associated neck dissection.
•maxillary artery, vein and their branches-blood supply
Cervicofacial flap:
Intra –oral flaps
Palatal flaps (Ashley)
Buccal advancement flaps -Rehrman’s -Moczair buccal sliding trapezoidal flap. (is slid to use the papilla of the adjacent tooth
to rotate into the defect)
Intraoral flaps (buccal)
Bipedicled flap
Ashley palatal flap
Modified palatal flap
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