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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_4366_Библиотеки_им_академика_М_И_Перельмана

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Chapter  Frequently Used Gras in Rhinoplasty: Nomenclature and Analysis 195
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18. Peck GC, Peck GC Jr, Adams WP Jr. Long-term follow-up of the onlay tip gra and umbrella gra. In Gunter JP, Rohrich RJ, Adams WP Jr, eds. Dallas Rhinoplasty: Nasal Surgery by the Masters. St Louis: Quality Medical Publishing, .
19. Sheen JH. Achieving more nasal tip projection by the use of a small autogenous vomer or septal cartilage gra. A preliminary report. Plast Reconstr Surg :-, .
20. Johnson CM Jr, Toriumi DM, eds. Open Structure Rhinoplasty. Philadelphia: WB Saunders, .
21. Guyuron B, Poggi JT, Michelow BJ. e subdomal gra. Plast Reconstr Surg :-; discus sion -, .
22. Peck GC Jr, Michelson L, Segal J, et al. An -year experience with the umbrella gra in rhinoplasty. Plast Reconstr Surg :-; discussion -, .
23. Tardy ME, Garner ET. Inspiratory nasal obstruction secondary to alar and nasal valve collapse: technique for repair using autogenous cartilage. Operative Tech Otolaryngol Head Neck Surg :­, .
24. Toriumi DM, Josen J, Weinberger M, et al. Use of alar batten gras for correction of nasal valve collapse. Arch Otolaryngol Head Neck Surg :-, .
25. Rohrich RJ, Raniere J Jr, Ha RY. e alar contour gra: correction and prevention of alar rim de­formities in rhinoplasty. Plast Reconstr Surg :-; discussion -, .
26. Gunter JP, Rohrich RJ. Correction of the pinched nasal tip with alar spreader gras. Plast Reconstr Surg :-, .
27. Constantian MB. Indications and use of composite gras in  consecutive secondary and tertiary rhinoplasty patients: introduction of the axial orientation. Plast Reconstr Surg :-, .
28. Perkins SW, Tardy ME. External columellar incisional approach to revision of the lower third of the nose. Facial Plast Surg Clin North Am :-, .
29. DeRosa J, Watson D, Toriumi DM. Structural graing in secondary rhinoplasty. In Gunter JP, Rohrich RJ, Adams WP Jr, eds. Dallas Rhinoplasty: Nasal Surgery by the Masters, ed . St Louis: Quality Medical Publishing, .
30. Gunter JP, Friedman RM. Lateral crural strut gra: technique and clinical applications in rhino­plasty. Plast Reconstr Surg :-; discussion -, .
31. McCollough EG, Fedok FG. e lateral crural turnover gra: correction of the concave lateral crus. Laryngoscope :-, .
32. Pessa JE, Peterson ML, ompson JW, et al. Pyriform augmentation as an ancillary procedure in facial rejuvenation surgery. Plast Reconstr Surg :-, .
33. Sheen JH. Adjunctive techniques: maxillary augmentation. In Sheen JH, Sheen AP, eds. Aesthetic Rhinoplasty, ed . St Louis: CV Mosby, .
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12
Harvesting Autologous Gras
for Primary Rhinoplasty
Rod J. Rohrich  Stefan O.P. Hofer  Jamil Ahmad
O
ver the past few decades, the trend in rhinoplasty has shied away from ab­lative techniques involving reduction or division of the osteocartilaginous frame­work to conserving native anatomy with cartilage-sparing suture techniques and augmentation of decient areas to correct contour deformities and restore struc­tural support. Consequently, there is a growing need for donor sites that provide sucient and consistent amounts of cartilage to produce adequate gras. Autolo­gous cartilage is preferred, because it is usually accessible with relatively minimal morbidity, integrates well into the recipient site, and has a signicantly lower rate of complications when compared to alloplastic materials.
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Autologous cartilage is preferred, because it is usually accessible with relatively minimal morbidity, integrates well into the recipient site, and has a signicantly lower rate of complications when compared with alloplastic materials.
Cartilage gras for primary rhinoplasty are generally harvested from the nasal septum. Ear cartilage is less frequently used. In the vast majority of patients, these donor sites provide enough cartilage for adequate sculpting of the nasal frame­work. In cases that demand a signicant amount of cartilage, it may be necessary to harvest rib cartilage. More recently, temporal fascia gras have also found util­ity as an autologous gra material in rhinoplasty.
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is chapter will focus on our preferred techniques for harvesting these carti­lages and temporal fascia. When designing these procedures, special emphasis has been placed on decreasing donor site morbidity and its functional and aes­thetic implications.
SEPTAL CARTILAGE
Septal cartilage is our primary choice for almost all gras used in primary and secondary rhinoplasty for several reasons. First, it is already within the opera­tive eld, and therefore no additional incisions are necessary for harvesting the cartilage. Second, if the harvest is performed on a deviated segment of septum, the patient’s airway may be improved postoperatively.
Septal cartilage is the primary choice for almost all gras used in primary rhino­plasty because it is already within the operative eld and no additional incisions are necessary for harvesting the cartilage.
Operative Technique
e cartilaginous septum is quadrangular in shape and bounded by three bones: the perpendicular plate of the ethmoid, the vomer, and the nasal crest of the maxilla. erefore releasing the required cartilage from these structures is nec­essary for adequate harvesting of the septum. During closed rhinoplasty, access for septal harvest can be obtained through a hemitransxion incision or a Killian incision. A full transxion incision should be avoided, because  to mm of tip projection can be lost, particularly when the dissection is carried down over the anterior nasal spine. Alternatively, the open approach can provide extensive ex­posure of the septum, facilitating septal harvest.
Aer separating the suspensory ligament between the medial crura, the anterior septal angle is identied. A scalpel is used to score the perichondrium about mm posterior to the anterior septal angle un til the underlying cartilage is exposed.
Initially a Cottle elevator is used to elevate the mucoperichondrial ap in a posterior and superior direction. is submucoperichon drial plane is identied by the distinct gray-blue appearance of the cartilage, the gritty feel of it, and the relative lack of resistance. Once in the submucoperichondrial plane, dissection proceeds quite easily. If there is resistance, this is usually because the plane of dissection is slightly supercial, and the perichondrium should be scored again so the ap can be elevated in the correct plane. Elevation of the muco perichondrial ap in a supercial plane will lead to a greater chance of mucosal perforations.
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In our practice, the open approach is preferred because of the improved visual­ization it aords and the ease of harvesting large quantities of septal cartilage. If reduction of the dorsum is indicated, this should be done before septal har­vest to ensure that an adequate L-strut is preserved. If the septal harvest is per­formed before dorsal reduction, any further excision of cartilage will decrease the width of the L-strut to less than what is required, weakening the remaining support and increasing the potential for deformities from lack of support, such as a saddlenose deformity.
If reduction of the dorsum is indicated, this should be done before septal harvest to ensure that an adequate L-strut is preserved.
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e submucoperichondrial plane is identied by the distinct gray-blue appear­ance of the cartilage, the gritty feel of it, and the relative lack of resistance.
Bilateral submucoperichondrial tunnels are dissected deep to the upper lateral cartilages and a scalpel is used to separate the upper lateral cartilages from the dorsal septum. Release of the upper lateral cartilages from the dorsal septum allows direct visualization of the entire dissection. e submucoperichondrial dissection should be continued bilaterally to release the entire quadrangular car­tilage. At the junction of the cartilaginous septum with the bony septum, dis­section becomes more dicult because of crossed perichondrial and periosteal bers, and care should be taken not to perforate the mucoperichondrial aps.
Small unilateral mucosal perforations typically do not require repair. If large per­forations or bilateral opposing perforations occur, they should be repaired using - chromic gut absorbable sutures. Repair of large or posterior perforations can be technically challenging because of the tight working space. In some cases, it may be necessary to place an interposition gra of cartilage, fascia, or allogras such as acellular dermal matrix to prevent bilateral opposing perforations to heal together, developing a septal perforation. In these cases, septal splints should be le in place for  to weeks to allow reepithelialization of the interposition gra.
Small unilateral mucosal perforations typically do not require repair. If large perforations or bilateral opposing perforations occur, they should be repaired.
e dissection is continued inferiorly and posteriorly over the posterior vomer. e junction of the perichondrium with the periosteum overlying this region is
­allel to the anterior edge of the septum, from the junction of the dorsal L-strut with the perpendicular plate of the ethmoid to the junction of the caudal L-strut with the maxillary crest. e
­tilage. e dorsal and caudal L-strut should be at least mm,
­quired to ensure long-term support. e L-strut should remain attached to the perpendicular plate at the keystone area and the
­sition points between the perpendicular plate of the ethmoid and the dorsal L-strut as well as between the dorsal and caudal
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particularly dicult to dissect and should be performed with great care. It may be helpful to dissect two separate tunnels, one subperichondrial and one subperi­osteal, and to divide the junction sharply to avoid tears in this region.
In cases of septal deviation, the mucoperichondrium on the convex side of the deviation is typically attenuated and more fragile making dissection more di­cult; mucosal perforations occur more readily on this side. On the concave side of the deviation, dissection is generally more straightforward, and the surgeon should be especially careful to avoid any mucosal perforations on this side.
In cases of septal deviation, the mucoperichondrium on the convex side of the deviation is typically attenuated and more fragile making dissection more dif­cult; mucosal perforations occur more readily on this side.
When the septal cartilage is harvested, an incision is made par
width of the L-strut is determined by the strength of the car
but in many instances a width of mm or more may be re
nasal spine−maxillary crest area. In addition, curving the tran
L-strut can help to strengthen the construct.
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In many instances, the width of the dorsal and caudal L-strut should be 15mm or more to ensure long-term support. Curving the transition points between the perpendicular plate of the ethmoid and the dorsal L-strut and between the dor­sal and caudal L-strut can help add strength.
e septal cartilage is then disarticulated from its posterior osteocartilaginous junctions with the perpendicular plate of the ethmoid, vomer and maxillary crest using a Cottle elevator. e septal cartilage can then be removed with ease.
If there is deviation of the bony septum or septal spurs, the septum can be mi­crofractured and returned to the midline. Microfracture of the septum should be performed in a careful and controlled manner to avoid uncontrolled fractures into the superior nasal septum and cribriform plate. is is particularly important in posttraumatic cases where there may have been a prior septal fracture. Bony spurs of the septum can be removed using Takahashi forceps. Septal cartilage or bone should be removed with ease; if there is any resistance, residual so tissue attachments should be completely released.
Microfracture of the septum should be performed in a careful and controlled manner to avoid uncontrolled fractures into the superior nasal septum and crib­riform plate. is is particularly important in posttraumatic cases where there may have been a prior septal fracture.
During these maneuvers, it is important to avoid pressure on the L-strut so that damage to the L-strut does not occur.
It is important to keep a record of the amount of cartilage harvested from the septum, and any excess material should be banked posterior to the L-strut for use during possible subsequent procedures.
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At the end of the operation, Doyle septal splints (Micromedics Inc., St. Paul, MN) are placed. It is oen necessary to trim the superior edge of the splints so they can be inserted and removed easily. e splints are lubricated with antistaphylococcal antibiotic ointment and secured with a single through-and-through - nylon horizontal mattress suture tied loosely to avoid strangulation of the septum as the tissues swell in the postoperative period. e goals are to avoid hematomas be­tween the mucoperichondrial aps, to support and stabilize the septal structures in the midline, to protect the mucosa, and to prevent the formation of synechiae by opposition of adjacent mucosal surfaces. Typically, the splints are removed aer  to days. Nasal packing is not routinely performed.
EAR CARTILAGE
Ear
Septal
cartilage
Ear cartilage can provide a surprisingly large volume of gra material. Given its accidity and the convolutions inherent in its structure, ear cartilage is ideal for reconstructing the lower lateral cartilages. It is most frequently used in second­ary rhinoplasty, when the septum has previously been harvested but has limited utility when structural support is mandatory. However, harvest of ear cartilage may be required during primary rhinoplasty to reinforce the lower lateral car­tilages or to extend support into the lateral nasal ala, which is not supported by
cartilage
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cartilage but merely contains brofatty tissue. In harvesting ear cartilage, the en­tire conchal bowl can be harvested without resulting in any contour deformity of the ear as long as the antihelix is not disturbed. Despite this, it is possible to harvest a signicant length of cartilage.
Ear cartilage may be harvested through anterior or posterior approaches. e scar resulting from its harvest is very well concealed, even when placed anteriorly within the conchal bowl. An anterior approach provides clear visualization of the exact area of cartilage to be harvested, making this a very precise procedure.
Given its accidity and the convolutions inherent in its structure, ear cartilage is ideal for reconstructing the lower lateral cartilages.
Operative Technique for the Anterior Approach
e anterior approach can be used when either a small or a large piece of cartilage is required. e anterior approach provides excellent exposure and is especially useful when a very large piece of cartilage is required.
e anterior approach provides excellent exposure and is especially useful when a very large piece of cartilage is required.
e incision is placed approximately mm inside of the conchal bowl both to camouage the scar within the concha and preserve the antihelix to prevent contour deformities of the ear. Before the incision is made, the concha is inl­trated from the anterior and posterior sides with  to ml of % lidocaine with