Date post: | 15-Jan-2017 |
Category: |
Health & Medicine |
Upload: | ram-raju |
View: | 2,514 times |
Download: | 1 times |
RHINOPLASTY RAMA RAJU
INCISIONS MAIN INCISIONS
1. Caudal septal incision (hemitransfixion)
2. Intercartilaginous incision3. Vestibular incision4. Infracartilaginous incision5. Transcolumellar inverted-V-incision
CAUDAL SEPTAL INCISION Aka hemitransfixion
Made 2 mm above and parallel to the caudal margin of cartilaginous septum
Incision provides access to;1. Septum2. Premaxilla and anterior
nasal spine3. Nasal dorsum4. Columella5. Floor of nasal cavity
Intercartilaginous incision Is a cut made in the
vestibular skin just cranial to the caudal end of triangular cartilage
Incision starts halfway along the lower end of cartilage and continues past .
Provides access to :1. Nasal
dorsum(cartlaginous and bony vault)
2. Valve3. lobule
Vestibular incisions Vestibular incision is
a slightly curved cut made in the vestibular skin just lateral to the margin of pyriform aperture.
It is used to access:1. Paranasal area2. Pyriform aperture3. Lateral wall of nasal
cavity
Infracartilaginous incision It is an incision at
the caudal margin of the lateral crus ,dome and medial crus of the lobular cartilage
It gives access to :1. Lobular cartilages2. Cartilaginous
vault
Transcolumellar inverted-v-incision: It is a horizontal
reversed-v- shaped incision of the columella at about one-third of the distance from its base , it is made in combination with infracartilaginous incision on both sides in the external approach
Access to1. Lobular cartilages2. Cartilaginous dorsum3. Anterior septum
SPECIAL INCISIONS EXTERNAL
1. Labiogingival incision2. Sublabial incision3. Paranasal incision4. Lateral columellar5. Rim incision6. Alarfacial incision7. ‘v’ incision of
columellar base8. Dorsal incisions
INTERNAL
1. Transfixion incision2. Transcartilaginous
incision3. Incisios in the
turbinate mucosa4. Incisions in the
septal mucosa
Pyramid surgeryOne of basic procedures in functional
reconstructive nasal surgery
It involves Mobilizing the bony pyramid Repositioning and fixation of bony
pyramid
steps for mobilizing the bony pyramid
1. Mobilizing and correcting the septum
2. Outlining the osteotomies3. Undermining the skin over the
pyramid4. Bilateral paramedian osteotomies5. Bilateral lateral osteotomies6. Bilateral transverse osteotomies7. Mobilizing the bony pyramid
Types of osteotomy1. Paramedian
osteotomy2. Lateral
osteotomy3. Transverse
osteotomy4. Intermediate
osteotomy5. Oblique
osteotomy
Paramedian osteotomies: It separates the
nasal bone from each other as well as from septum ,they are made on both sides
The nasal bones are separated at intranasal suture.
Mostly done through intraseptal approach
Paramedian osteotomy intraseptal approach technique
Lateral osteotomy It separates the
lateral bony wall of pyramid from nasal process of maxilla.
A cut is made into the bone above and more or less parallel to NBL
Lateral osteotomy through endonasal-subperiosteal technique
Transverse osteotomy A transverse
osteotomy separates the bony pyramid from the frontal bone and the nasal spine of the frontal bone.
This osteotomy is usually made at a level just below the nasion
Transverse osteotomy through endonasal – subperiosteal approach
Repositioning the bony pyramid After mobilizing, bony pyramid is
repositioned using maneuvers like1. Bilateral infracture2. Bilateral outfracture3. Rotation by unilateral infracture and
outfracture on opposite side4. Rotation following u/l wedge resection5. Push down with bilateral infracture6. Letdown following b/l wedge resection7. Push up
Bilateral infracture Both lateral walls of
the bony pyramid are moved inwards (medially).
This requires paramedian , lateral and transverse osteotomies on both sides.
Bilateral outfracture Lateral walls of the
bony pyramid are moved outward (laterally), thus widening the pyramid and valve area
Requires paramedian , lateral and transverse osteotomies.
Rotation by u/l infracture and outfracture on opposite side Long ,shallow side is
infractured Short steep is
outfractured Lateral osteotomy on
the longer side is performed somewhat higher than on short side so that distance b/w osteotomies and dorsum become symmetrical
Rotation by u/l wedge rotation A wedge of bone
is resected at the base of long side of pyramid
Used in patients with severely deviated bony pyramid
Push down with b/l infracture The bony pyramid is
pushed down and b/l infractured
Projection is reduced and pyramid is narrowed
Requires resection of basal horizontal and posterior vertical strip from septum in combination with osteotomies
Let down following b/l wedge resection
Bony pyramid is let down after performing osteotomies and b/l wedge resection
This technique allows lowering of the bony pyramid without concominant narrowing.
HUMP REMOVAL TYPES OF HUMP
1. Bony hump 2. Bony and cartilaginous hump3. Cartilaginous hump
Surgical techniques:1. Reduction by rasp and file2. Resection3. Push-down with infracture of
pyramid4. Let down of pyramid following
bilateral wedge resection
Correcting bony hump with rasp and file
Is performed through intercartilaginous incision
Only bony bumps can be corrected with this .
Not effective on cartilage
Resection of bony and/or cartilaginous hump
Most common way to correct bony and/or cartilaginous hump
Had several drawbacks We resect the bony part of hump first
and f/b cartilaginous part The bony part is resected with chisel ,f/b
smoothing the defect with rasp The cartilaginous hump is then resected
by using straight or angled scissors
Resecting bony hump The hump to be
resected is outlined on the skin
The dorsum is approached by combining the right intercartilaginous with the CSI. This is f/b wide undermining of the dorsal skin
The skin over the bony and cartilaginous dorsum is undermined subperichondrially and subperiosteally
Resection is done with chisel
Bevel up –first part Bevel down-upper
part
Resecting a cartilaginous hump The triangular
cartilages are separated intraseptally from septal cartilage using no.64 beaver knife
The cartilaginous hump is resected stepwise , the height of the cartilaginous pyramid is adjusted to the height of the modified bony pyramid
The triangular cartilages are sutured to the septal cartilage to close the cartilaginous pyramid
saddle nose correction Types of saddling
1. bony and cartilaginous saddle nose
2. Low , wide pyramid syndrome3. Bony saddle4. Cartilaginous saddling
Bony and cartilaginous saddle nose
both bony and cartilage pyramid severely depressed.
Corrected by reconstruction of septum ,narrowing and push up of bony pyramid following osteotomies and dorsal transplant.
Low wide pyramid syndrome both bony and
cartilaginous pyramid are severely depressed and lobule is wide and low
Valve area is lowered and widened ,valve angle is increased (>90 degress)
Is corrected the same way as for bony and cartilaginous saddle nose
Bony saddle Dorsum is severely
depressed, while cartilaginous pyramid and cartilaginous septum are normal
Corrected by narrowing and push up of the bony pyramid following osteotomies and insertion of a dorsal transplant.
Cartilaginous saddling Cartilaginous pyramid
is severely or moderately depressed and broadened .
There may be atropy or balloning of triangular cartilages
Most common cause is killian-freer submucous septal resection
This is corrected by anterior rotation of septal cartilage.
Surgical techniques Repositioning and reconstruction of
anterior septum Narrowing and push up of bony
pyramid following osteotomies Augmentation of pyramid by inserting
a dorsal implant Increasing lobular projection and
narrowing lobular width Lengthening and lowering the
columella
Repositioning and reconstruction the septum
Done through CSI incision Through antero-superior
tunnel and inferior tunnel ,premaxilla and anterior nasal spine is exposed
Anterior septum is detached from base and bony septum
Guide wires are fixed to caudal end of septum at its ventrocaudal angle and its base
Augmentation by dorsal implant
Limited degree of cartilage sagging is corrected by inserting crushed sepatal cartilage through intercartilaginous or caudal septal incision.
Autografts such as conchal cartilage , rib cartilage can be used for augmentation.
Inserted through IC incision
Undermining of dorsal skin
Pocked created between two domes to accomdate caudal end of transplant
Held in place by external stenting
Tip surgery
“The one who masters tip masters nose”
tip surgery is never related to improvement of function ,but is always done for aesthetic reasons.
Characteristics of tip most prominent point or area of external
nasal pyramid
Built by:1. Two lobular cartilages2. Inter-domal soft tissue3. Overlying skin
Tip is defined by two domes ,should be visible as separate structures.
Projection of tip Aka tip prominence Too high- narrow pyramid
syndrome Too low-wide pyramid
syndrome (saddle nose)
Projection related to :1. Lobular base line2. Nasal base line3. Prominence of bony
cartilaginous pyramid4. Nasal lenghth
Position of tip Position of tip in vertical and
horizontal axis of face is determined by above mentioned factors.
Upwardly rotated tip Pendant or drooping tip
Tip abnormalities1. Broad ,bullous,square,ball tip2. Bifid tip3. Asymmetrical tip4. Underprojected tip5. Overprojected tip6. Upwardly rotated tip7. Hanging (pendant ,drooping )tip
Broad,bullous,square,ball tip Broad tip- domes apart Bullous-domes are wide and
massive Square tip-domes are not
arched but rectangular Ball tip-domes rounded
Is due thickness of both cartilage , lobular skin and subcutaneous tissue
Requires narrowing procedure without compromising function.
Bifid tip Tip is duplicated due
to an abnormally large distance between the two domes with an excessive amount of interdomal connective tissue.
Requires dissection and repositioning of the lobular cartilage
Asymmetrical tip Domes are
asymmetrical .
It is isolated variety or in combination with bifidity
Underprojected tip The projection of the
tip is abnormally low compared with that of bony and cartilaginous pyramid
Requires complete septorhinoplasty
Projection of domes may be increased by redraping the lobular cartilage ,columellat strut ,or by applying tip graft
Overprojected tip it is abnormally
prominent when compared to projection of cartilaginous and bony dorsum
Requires complete suptorhinoplasty
Projection of domes dimnished by redraping of lobular cartilages or by minor resections
Upwardly rotated tip Tip is more cranial
than normal Upwardly rotated
tip is usually overprojected
Nasolabial angle is large
Hanging tip Tip is more caudal
than normal and underprojected at the same time .
The nasolabial angle is abnormally smaill
Surgical technique
1. Narrowing tip and supratip area2. Increasing tip projection3. Reducing tip projection4. Upward positioning (rotation) of tip5. Downward positioning of tip
Narrowing tip and supratip area it is narrowed by1. Resecting a strip or wedge of
cartilage from the cranial margin of lateral crus
2. Suturing the domes together3. Redraping the lobular cartilage
Resecting a strip or wedge of cartilage
Done by intercatilaginous incision and using retrograde technique
The cranial margin of the lateral crus is inverted by hook and the vestibular skin and the cranial part of the lateral crus is cut
Suturing the domes together Done by external
approach
If required resections or incisions are made to break the spring
Both domes are brought together by suturing
Redraping the lobular cartilage Done using external
approach The lateral crus and dome
are dissected from underlying vestibular skin leaving the medial crura
The lateral crura are moved in ventral direction making the domes more projecting
Now transcrural and transdomal sutures applied
Reducing tip projection Reduced by various ways
1. Let down of pyramid and lobule2. Lowering domes by dome
resection and reconstruction technique
3. Resecting strips from medial crura
Let down of pyramid and lobule when overprojected tip
is part of narrow pyramid syndrome
Removing of horizontal and vertical strip of septal cartilage along with bilateral wedge resection
Procedure will broaden lobule and reduces tip
Dome resection and reconstruction technique
Delivery approach is required
Tip projection is decreased by resecting small strips from the lateral and medial crus just lateral and medial to domes , the strips are removed and domes are repositioned
The domes are sutured to medial and lateral crura
Resecting strips of medial crura External approach is
mandatory Tip projection is
decreased by resecting nonopposing strips from the medial crura
The lateral ends of lateral crura is somewhat shortened to allow reduction of lateral leg of tripod
Upward positioning of tip1. Resecting a triangle of cartilage from
the caudal septal end,with or without resecting a triangle of skin from the membranous septum
2. Trimming the cranial margin of the lateral crus with resection of a triangle of vestibular skin
3. Resecting a triangle of cartilage,skin and mucosa from the lower margin of triangular cartilage
Upward rotation and shortening of nasal length by resections from
1. Caudal end of septum2. The caudal margin of
lateral crura3. The caudal margin of
triangular cartilage
Upward rotation of the tip and shortening of nasal length by resecting a ventrally based triangle of cartilage from the caudal septal margin
A triangle of vestibular skin resected from membranous septum
The medial part of cranial margin of the lateral crus is resected together with triangle of vestibular skin
A triangle of cartilage is resected from the lower margin of the triangular cartilage
Increasing tip projection
1. a columellar strut (in combination with anterior septal reconstruction)
2. A tip graft (a shield graft)3. Redraping of the lateral crura and
domes with lateral crural steal
Columellar strut External or
endonasal approach Anterior septum
reconstructed A strut with 3mm
width and 20-25mm length is positioned on the anterior nasal spine between the medial crura
Strut is fixed 2 or 3 transverse sutures
Tip graft or shield graft Placed by either
external approach or CSI
Sculpted according to requirement
Sutured to domes with resorbable sutures