2. EXTENT OF SCALP
Anteriorly : supraorbital rims
Posteriorly : the nuchal line.
Laterally: from the frontal process of the zygoma to
the prominence of the mastoid process.
3. LAYERS
S is skin
C is subcutaneous tissue
A is aponeurotic layer
L is loose areolar tissue
P is pericranium
4. IMPORTANT POINTS OF GALEA
Connective tissue septa within the subcutaneous layer connect firmly to
the underlying musculoaponeurotic layer
Galea aponeurotica : musculoaponeurotic layer that extends from the
frontalis muscles anteriorly to the occipitalis
Laterally the galea continues as the temporoparietal fascia.
Galea is highly vascularized
Subgaleal fascia : loose areolar layer beneath the galea
- thin over the vertex
- thicker in the temporoparietal region.
- richly vascularized and can be elevated as an
independent layer
5. PERICRANIUM
periosteal layer of the calvaria.
Thick collagenous layer with a rich blood supply
Firmly attached to the skull in the region of the sutures.
Pericranial flaps
6. TEMPOROPARIETAL REGION
four distinct fascial layers
Superficial temporal fascia:
most superficial layer
This layer is a direct extension of the
galea
closely applied to the overlying skin
7. Deep to the superficial temporal fascia is the subgaleal fascia.
Contained within this easily dissected layer are the superficial temporal
artery and the frontal branch of the facial nerve.
Under the subgaleal fascia is the superficial temporal fat pad.
Numerous large perforating veins course through this layer
Temporal fat pad : continuous with the buccal fat pad of the midface.
8. DEEP TEMPORAL FASCIA.
Beneath the superficial temporal fat pad
thick fascial layer surrounding the temporalis.
Superiorly deep temporal fascia fuses with the pericranium.
Inferiorly, it splits into two layers at the level of the frontozygomatic
suture.
The superficial portion of the deep temporal fascia attaches to the
lateral border of the zygomatic arch.
The deep layer fuses with the medial aspect of the arch
9. Reflection of the superficial portion of the deep temporal fascia : Protects
facial nerve branches from injury.
Temporalis Blood Supply : two deep temporal branches of the internal
maxillary artery: the middle and deep temporal
11. NERVE SUPPLY MOTOR
Muscle Nerve supply
Frontalis Frontal br. Of Facial
Occipitalis Posterior auricular
Temporalis Posterior and Anterior branches of
Deep temporal Nerve
{branch of Trigeminal N }
12. SENSORY NERVE SUPPLY
Supratrochlear Medial forhead
Supraorbital
Superficial
Deep
Central forhead
Remaining Frontoparietal
region
Zygomaticotemporal of
Maxillary division of
Trigeminal N
Skin lateral to temporal crest
Auriculotemporal of Trigeminal
N Lateral scalp
Greater and lesser occipital N Posterior scalp
16. NPWT
Can help to reduce size, make healthy granulation tissue over the floor
Molnar et al
the use of the NPWT in conjunction with skin grafts for full-thickness
lesions of the scalp.
They combined decortication of the outer surface of the skull with
immediate skin grafting in four patients with successful graft take.
17. PRIMARY CLOSURE
If <3 cm
Galea scoring :- method of decreasing tension on wound margins
avoid injury to major vessel
1 mm gain in each incision, keep 1 cm gap
Obtain meticulous hemostasis following galeotomy to prevent hematoma
Chances of distal flap vascular
compromise
18. TISSUE EXPANSION
Rapid intraop Tissue expansion and
closure :
3-4 cycles of inflation and deflation of the
expander for 3–5 minutes are performed.
19. STAGED TISSUE EXPANSION TECHNIQUES
subcutaneous or subgaleal position
Expansion begins at 2 weeks following placement.
The device is expanded on a weekly or biweekly basis until the tissue
requirements of the defect are met.
Expansion should be continued until the expanded flap is approximately
20% larger than the size of the defect
tissue expansion produces a delay phenomenon
Defects up to 50% of the scalp can be reconstructed.
decreased hair follicle density.
20. Austad advocates against tissue expansion in acute injuries because
of the risk of contamination and implant exposure.
Disadvantage : 2 stage procedure
Complications :
Hematoma
implant exposure
infection
flap necrosis
Alopecia
wide scars.
Pressure from the expander can deform the cranial vault.
21. SKIN GRAFTING
prerequisite for skin grafting
adequately vascularized wound bed.
Preservation of the cranial periosteum or the underlying subcutaneous
tissue of the scalp
Drill holes upto diploic spaces and NPWT F/B interval STSG
Crane principle
22. LOCAL FLAPS
Rotation flap
Transposition flap
Gillies tripod flap
Juri flap
Orticochea flap
Bipedicled flap
Temporoparietal flap
Frontooccipital flap
O to T , Y to T flap
Cervical fascial advancement flap
27. ORTICOCHEA FLAP
two anterior ones that are placed in the front part of the defect and a
transverse flap that is placed in the back.
The posterior transverse flap is situated at the nape of the neck and has its
pedicle located in the retroauricular region.
This pedicle should be placed on the side opposite the raw surface to be
reconstructed.
28.
29.
30. When a large scalp flap is rotated, the dissection should be
subgaleal
Temptation to revise the dog-ear should be resisted . It will
flatten with time
31. JURI FLAP - TEMPOROPARIETO- OCCIPITAL FLAP
If defect size <25 cm length as this flap can be taken upto 25 cm
Based on Parietal br . Of STA
Delay needed
36. GALEAL FLAP
Based on STA
galeal flap is commonly based on a named scalp vessel or combination of
vessels.
Flap length can often cross the midline
Can be elevated with frontalis muscle of the forehead to reconstruct the
anterior cranial base.
Can be taken with bone [vascularized cranial bone for reconstruction about
the orbit and facial skeleton ]
Subgaleal areolar tissue can be raised with the underlying periosteum as a
turnover flap to provide vascularized coverage for denuded calvaria
37. DEEP TEMPORAL FASCIA FLAP
The temporalis fascia is a direct lateral extension of the scalp
periosteum.
This structure obtains its blood supply from the middle temporal
artery, a branch of the superficial temporal artery.
Thus, a composite flap of superficial temporal fascia and
temporalis fascia can be isolated on the same vascular leash.
38.
39. TEMPORALIS MUSCLE
Origin : the temporalis fossa
It passes under the
zygomatic arch
Insertion :coronoid process
of the mandible.
Blood Supply : DTA
Always need grafting for
cover
41. REGIONAL FLAP
Trapezius flap : type 2
For occipital defects
blood supply :- transverse cervical
dorsal scapular
occipital arteries
Pattern :
Transverse flap : upper fibres [A/w shoulder drop]
Vertical flap : middle and lower fibres
8-10 cm donor defect can be closed primarily
42.
43.
44.
45. LD FLAP [PEDICLED /FREE]
By passage of the muscle through the axilla,
defects in the orbit and temporal bone can be
repaired.
46. OTHER REGIONAL FLAPS
Splenius capitis for occiput
Pectoralis major flap for mastoid and temporal region
47. FREE TISSUE TRANSFER
LD [Flap of choice for large defects]
RFF
ALT
Omental Flap with STSG
Free temporo-occipital scalp flap for free hair
baring tissue transfer
48. CHECKLIST
I. Named vessel included?
II. Native hairline preserved ?
III. Mode of injury?
IV. Inherent inelasticity of galea and mobile parietal and
occipital region [neck]
V. Donor site : less sensitive cosmetically?