Figure 109-8. A: Standard nipple-areolar complex tattooing after nipple reconstruction. B: 3D tattooing of nipple-areolar complex
without nipple reconstruction.
Although a variety of approaches have been described for breast reduction, common surgical options
share a number of characteristics. Most techniques of breast reduction resect both breast parenchyma
and redundant skin. Also, reduction procedures generally reposition the NAC to a more superior point
on the breast mound. To maintain nipple viability and sensation, the NAC usually is mobilized as part of
a pedicle of breast parenchyma or dermis. Following dissection of the nipple pedicle and reduction of
the surrounding breast skin and parenchyma, the pedicle is transferred superiorly with its vascular and
neural supplies intact, while the remaining breast is reapproximated around the nipple pedicle.
In categorizing reduction mammoplasty techniques, surgical options often are described in terms of
the nipple pedicle design. For example, the most common approaches rely on an inferiorly or centrally
based dermal–parenchymal pedicle to maintain vascular and nerve supplies to the NAC (Figs. 109-9A to
C and 109-10A to C).49–51 In designing skin incisions, traditional methods of reduction often have
incorporated a modification of a pattern originally described by Wise.52 While allowing considerable
flexibility in resection of redundant breast skin, the modified Wise pattern produces an inverted T –
shaped scar, the inferior portion of which runs along the inframammary fold (IMF) (Fig. 109-11). In an
effort to eliminate the IMF scar, Lejour et al.53,54 have described a vertical scar reduction mammoplasty.
Prospective outcome analysis of women undergoing reduction mammoplasty indicate that this
surgical intervention produces considerable improvements in somatic pain and in functional status.55,56
However, patients and providers also should be aware of the potential risks associated with reduction.
Complications reported with these procedures include instances of nipple or skin loss, changes in levels
of nipple sensation, hypertrophic scarring or keloid formation, contour deformities, and breast
asymmetry.
Figure 109-9. Inferior pedicle technique for reduction mammaplasty.
3226
Figure 109-10. Central pedicle technique for reduction mammaplasty.
Figure 109-11. Inferior pedicle Wise pattern bilateral breast reduction. A: Pre-operative. B: Post-operative.
Aesthetic Breast Surgery
Breast Augmentation (Augmentation Mammoplasty)
Augmentation or breast enlargement is one of the most commonly performed aesthetic procedures.
Evaluation of patients seeking breast augmentation should follow the guidelines described earlier.
Particular attention should be focused on thoroughly assessing several factors, including patient
preferences for postoperative breast size and shape, history of breast disease, and physical findings. The
3227
preoperative examination should evaluate and document any possible breast masses as well as existing
breast size, asymmetries, and contour deficits.
In planning augmentation mammoplasty, a variety of approaches and options are available. Decisions
regarding these choices are often best reached in consultation with the patient. Implants can be placed
through a variety of incisions including periareolar, IMF, and transaxillary approaches (Fig. 109-12).
With the advent of endoscopic techniques in recent years, transaxillary augmentation now can be
carried out with direct visualization of the implant pocket. This latter approach commonly produces
excellent aesthetic results with minimal visible skin scarring.
Location of the implant pocket is another critical decision in augmentation mammoplasty. Implants
can be placed anterior to the pectoralis major muscle (“subglandular” location) or posterior to the
muscle (“subpectoral” location). Subglandular placement usually results in less postoperative pain, but a
submuscular implant location may produce lower rates of capsular contracture57 and may pose fewer
difficulties in obtaining subsequent mammograms.58
Several choices also exist in selection of implant types. Since the mid-1990s, many surgeons have
been relying on the use of implants with textured surfaces to reduce capsular contracture rates.
Although textured surfaces appear to lessen scar tissue contracture,59 some patients and surgeons assert
that, compared with the smooth-walled envelope, the thicker, less pliable textured envelope gives the
augmented breast a less natural appearance and feel. With the reintroduction of silicone gel–filled
implants in the United States, patients and providers also have a choice of implant fill materials.
Although gel implants may produce aesthetically superior results compared with saline implants in some
patients, diagnosis and surgical treatment of implant rupture may be more challenging with gel devices.
Further refinements in silicone gel materials have led to the recent introduction of highly cohesive gel
implants which have an anatomic shape and a reduced the risk for gel leakage in the event of rupture.
Indications for highly cohesive gel implant use and critical aspects of patient selection are currently
under investigation.
3228
Figure 109-12. Breast augmentation via inferior mammary fold (IMF) incisions. A: Pre-operative. B: Post-operative.
Figure 109-13. A: Mild ptosis. B: Moderate ptosis. C: Severe ptosis.
Whatever options are chosen for breast augmentation, surgeons should clearly communicate with
patients about the potential risks of these procedures. The most commonly reported complications
include implant rupture, capsular contracture, implant infection, contour deformities, and breast
asymmetries.60 Despite the potential for local complications, there currently is no substantial evidence
that silicone gel filler material or implant envelopes are associated with increased risk for systemic
disease. To date, concerns voiced in the early 1990s about adverse “health effects” of silicone breast
implants appear to be unfounded.61 However, over the past decade a few cases of anaplastic large cell
lymphoma (ALCL) in patients with breast implants have been reported with growing evidence of an
association.62–64 The form of ALCL found in patients with implants tends to be benign, often regressing
after implant and capsule removal without systemic therapy.63,64
Mastopexy
Mastopexy (or “breast lift”) describes a category of surgical procedures designed to address redundancy
or laxity of the breast’s skin envelope, a condition termed ptosis of the breast. Breast ptosis can be
classified as mild, moderate, or severe, depending on the location of the NAC relative to the IMF (Fig.
109-13). Ptosis occurs when an imbalance exists between the volume of breast parenchyma and the
quantity of overlying skin. Mastopexy procedures usually reduce ptosis by removing redundant breast
skin and by relocating the NAC to a more superior position. These goals can be achieved through a
variety of skin incisions and excisions, many of which closely resemble techniques described earlier for
reduction mammoplasty. Fundamentally, mastopexy differs from breast reduction in that mastopexy
removes redundant skin while leaving most or all of the breast parenchyma. Approaches to mastopexy
range from minimal periareolar techniques to more extensive skin resections using more extensive
vertical incisions (Fig. 109-14A and B). As always, patients considering this procedure must weigh the
potential benefits of mastopexy (most notably, diminished ptosis) with the disadvantages (scars and
risks of complications) associated with the operation. Although relatively rare, the potential
complications of mastopexy closely parallel those described for reduction mammoplasty.
RECONSTRUCTIVE SURGERY OF THE HAND
Advances in plastic surgery have improved our ability to reconstruct hands that have been mutilated by
trauma, destroyed by arthritic diseases, or impaired by congenital conditions. Innovations in
microvascular techniques, wound management, and rigid fracture fixation have expanded the
capabilities of plastic surgeons by allowing them to borrow tissues from other parts of the body and use
them to reconstruct complex defects in the upper extremity in a single procedure. These innovations
provide limitless technical possibilities for the restoration of hand function and the eventual return of
patients as productive members of society. The following sections highlight the technical aspects of
3229
hand reconstruction and discuss indications for and applications of these techniques.
Trauma
Replantation
3 Since the first successful finger replantation by Komatsu and Tamai65 in 1968, replantation surgery
has flourished throughout the world. Thirty years of experience with replantation surgery has improved
our understanding of this procedure and has resulted in the development of indication guidelines to
ensure that replanted upper extremity parts not only survive, but have acceptable function as well. The
absolute indications for replantation (i.e., situations in which replantation should always be attempted)
are (a) thumb amputation, (b) multiple finger amputations, (c) pediatric population amputations, and
(d) mid-hand, wrist, or distal forearm amputations. The absolute contraindications for replantation are
(a) associated life-threatening injuries, (b) multiple-level injury in the amputated part, causing injuries
along the vessels and preventing blood flow into the replanted part, and (c) severe contamination of the
part, which carries a high probability of systemic infection if replanted. There are other situations in
which the benefit of replantation is debatable because outcome data are not available. For example,
single-finger amputation at zone II (a tight fibroosseous tunnel extending from the insertion of the
superficialis tendon at the middle phalange to the first annular pulley) is generally not recommended.
Tendon adhesion after zone II replantation may result in a stiff finger, which can interfere with the
overall performance of the hand. On the other hand, single-finger amputation at zone I (distal to the
superficialis insertion) is often recommended (Fig. 109-15). A stiff distal interphalangeal joint generally
does not cause much impairment, and nerve regeneration to the replanted part is quite rapid because of
the short distance to the terminal sensory organs. Furthermore, the aesthetic appearance of zone I
replantation is far superior to that of an amputation stump. In the future, the use of patient-related
outcome instruments and an increased body of replantation experience among centers will help to
define the utility of various digit replantation procedures.
Figure 109-14. Mastopexy procedures. A: Circumareolar technique. B: Vertical scar technique.
3230
Figure 109-15. A: Amputation of the index finger at zone 1 in a mechanic. The patient requested replantation because his work
requires fine manipulative tasks. B: Successful replantation with good aesthetic outcome and function.
Toe Transfer
When finger replantation is not possible or not successful, patients are left with significant functional
loss. Disability is most severe when the thumb has been amputated at or proximal to the
metacarpophalangeal joint or when all of the fingers have been amputated in machine injuries. In these
cases, toe transfer to the hand is an effective procedure in restoring grasp and pinch function. Although
a prosthesis is available to mimic the thumb, lack of sensation is a major drawback and often leads to
disuse of the prosthesis. For a patient who has had a thumb amputation at or proximal to the
metacarpophalangeal joint, big toe or second toe transfer to the thumb can create a sensate digit that
will oppose to the other fingers. Big toe transfer is advantageous because it provides a broad contact
surface and closely resembles the shape of the thumb, particularly when the big toe is trimmed and
sculptured to match the size of the thumb. However, the disadvantage of the big toe transfer is the
conspicuous donor site appearance in the foot and potential gait problems with foot push-off if the head
of the first metatarsal is taken along with the big toe. For these reasons, the second toe has become the
preferred method of transfer in some centers (Fig. 109-16). The disadvantage of the second toe transfer
procedure is the slender appearance of the digit as compared to the original thumb, but the donor site
appearance is quite acceptable. A recent outcome study, using objective physical measurements and
validated outcome questionnaires, demonstrated that toe-to-thumb transfer is an effective procedure in
restoring hand function.66 In addition, patients did not complain of gait difficulty after either big toe or
second toe transfer.
One of the most complex problems in hand surgery is the reconstruction of a hand without digits. To
create a new hand capable of tripod pinch, plastic surgeons can transfer multiple toes from both feet to
the hand (Fig. 109-17). This type of reconstruction can restore function to an otherwise useless hand
and has allowed two farmers who were treated at one center to return to heavy farm labor.
Complex Hand Injuries
Although crush injuries to the hand are common, injuries associated with sufficient force to disrupt the
structural integrity of the wrist and to sever the blood supply to the hand are uncommon events (Fig.
109-18). Because multiple structures are traumatized in injuries of this kind, a systematic treatment
approach is important in salvaging the hand and in restoring its function. Crucial steps in the
management of this injury are: (a) ruling out other injuries, (b) aggressive débridement, (c) skeletal
fixation, (d) decompression of fascial compartments in the hand, (e) revascularization, (f) tendon repair,
(g) nerve repair, and (h) early soft tissue coverage (within 1 week of injury).
3231
Figure 109-16. A: Second-toe transfer for thumb reconstruction in a carpenter. He sustained a thumb amputation at the
metacarpophalangeal joint while using a saw at work. B: Good function with restoration of fine pinch. The patient returned to
work as a carpenter 3 months after the toe reconstruction.
Figure 109-17. A: A farmer who lost all his fingers when he was injured by a corn picker. A groin skin flap was used to cover the
exposed metacarpal heads. B: A second toe was removed from one foot to reconstruct the thumb, and the second and third toes
were removed together from the other foot to reconstruct the fingers. Note the good opposition of the thumb and acceptable
flexion of the digits. The patient returned to work on his dairy farm after the hand reconstruction.
3232
Figure 109-18. A: Accidental shotgun blast injury in a 16-year-old boy. Both the radial and ulnar arteries were ruptured, and the
hand was ischemic. The wrist was destroyed, and multiple tendons and nerves were severed. B: Volar wrist wound. Markings show
incision lines for ulnar artery exposure.
Ruling Out Other Injuries
In devastating trauma, attention is often focused on the obvious injury, and injuries to other organ
systems may be ignored. In a review of 1,100 patients referred for emergent microsurgery over a 7-year
period, investigators found 9 cases (0.8%) of unrecognized life-threatening injuries that required
abandonment of the microsurgical procedures.67 Therefore, systematic trauma evaluation and ruling out
other associated injuries should precede treatment of the hand injury.
Débridement
Severe crush and blast injuries are associated with large zones of injury, and the wounds may be
contaminated with foreign materials such as grease or paint, as in printing-press injuries. In these cases,
aggressive débridement is important in preventing infection. Except for critical structures that include
nerves and tendons, all devitalized soft tissues and bone fragments must be excised. The concept of
radical débridement has been shown to decrease wound infection and improve success of microvascular
reconstruction.68
Skeletal Fixation
After débridement, the next priority is to stabilize the wrist and to rigidly fix hand fractures. A stable
wrist provides a platform for repairing other injured structures. If the crush injury is associated with
comminuted fractures of multiple carpal bones and rupture of the intercarpal ligaments, wrist fusion
may be the best option because it is often impossible to reconstitute the normal anatomy of the distal
and proximal carpal rows in face of severe comminution of the carpal bones. To avoid possible bone
graft contamination with primary wrist fusion, external fixators are placed for provisional fixation
during the initial débridement. Definitive wrist fusion with bone grafting is performed after adequate
débridements and during the flap coverage procedure. Two 2.7-mm fixator pins are placed through an
incision along the radial index metacarpal, and two proximal 3.5-mm pins are placed into the radius
using an incision along the radial border of the distal radius, between the brachioradialis and the
extensor carpi radialis longus. The superficial radial nerve, which lies under the brachioradialis, is
dissected free and retracted away from the pins. External fixator rods are then secured to the pins with
nuts and screws. If the wound is clean during the second-look procedure at 24 or 48 hours, total wrist
fusion is then undertaken (Fig. 109-19). Otherwise, the external fixator is left in place until the wound
is suitable for fusion using internal plating and cancellous bone grafts. This stable skeletal fixation
allows early hand therapy, usually instituted on postinjury day 7 when tissue edema is subsiding.
Revascularization
3233
In a crush injury of the wrist, the zone of injury can be extensive. Use of vein grafts is essential in
performing the arterial anastomosis away from the zone of injury. The ulnar artery is chosen for repair
because it is the dominant artery in most patients and because it can be exposed readily in the
hypothenar area. If the ulnar artery is contused in the palm, distal anastomosis can be performed to the
superficial palmar arch. Because soft tissue bridges are often present, venous outflow is not a problem
and venous anastomosis is not necessary.
Decompression of Fascial Compartments
Increased edema associated with crush injuries often raises the compartmental pressures in the intrinsic
muscle compartments and in the carpal tunnel. Prior reviews have shown a high incidence of ischemia
and resultant fibrosis of the intrinsic muscles following crushing trauma to the hand.69 Consequently,
surgeons perform prophylactic carpal tunnel releases and intrinsic muscle decompressions in severe
crush injuries of this kind.
Figure 109-19. A, B: Note destruction of the wrist joint, in addition to comminuted fractures of the distal ulna and radius. C: Total
wrist fusion was performed 48 hours after the initial injury.
Soft Tissue Coverage
3234
After aggressive débridement, a soft tissue defect is often present around the wrist. A split-thickness
autograft is placed over the vein graft to prevent desiccation. Other open wounds can be covered
temporarily with homografts. If wrist fusion is undertaken during the second-look procedure, primary
wound closure can be achieved. For residual wound defects, split-thickness autografts are used to cover
the exposed muscle bellies. However, if tendons or nerves are exposed, coverage with either
fasciocutaneous or muscle free flaps will allow earlier tendon mobilization and prevent tendon
adhesions. Definitive early wound coverage is important in protecting vital structures and avoiding
wound colonization with bacteria (Fig. 109-20).
Nerve Repair
When nerves are crushed, the delineation between viable and nonviable nerve fascicles is difficult to
assess in the acute setting. Therefore, the traditional approach is to delay the nerve grafting procedures
until 2 or 3 months after injury. To prevent retraction of the nerve ends, we suture the nerve ends to
the surrounding soft tissues. However, secondary nerve grafting is often difficult because of the amount
of scar in the wound. One way is to primarily graft the nerve injury at the expense of more aggressive
resection of the traumatized nerve ends.
Figure 109-20. A: A free rectus muscle was used for immediate coverage of the reconstructed wrist and tendons. B: The hand was
salvaged, and the patient has acceptable hand function after secondary nerve and tendon reconstruction.
4 In conclusion, rigid skeletal fixation, revascularization using vein grafts, and immediate wound
coverage are crucial factors in successful limb salvage.
Congenital Anomalies
Syndactyly
Syndactyly is a condition in which the fingers are fused. It can be classified as complete or incomplete.
Complete syndactyly is the union of the digits extending to the distal phalanx. Incomplete syndactyly is
the union of the digits proximal to the distal phalanx but distal to the normal webbing at the
midproximal phalanx. Syndactyly is further categorized as simple or complex. In simple syndactyly,
there is no bony union between the digits, whereas complex syndactyly includes bony union.
Typically, syndactyly can be separated when the child is 1 year of age. Surgery should be performed
earlier if syndactyly affects the thumb–index finger or ring–little finger web space and causes deviation
of the shorter digits during growth. Separating the fingers requires meticulous design of the skin flaps,
and the dorsal skin flap is most crucial to creating a web space that is not prone to contracture (Fig.
109-21). Distally, triangular skin flaps are designed to drape the sides of the fingers. A full-thickness
skin graft from the groin is often required to cover open areas in the fingers.
3235
Figure 109-21. A: A simple, complete syndactyly in a 1-year-old child. Note the design of the dorsal skin flap to reconstruct the
web space and the interdigitating distal skin flaps. B: Immediate postoperative photograph of the syndactyly release.
Figure 109-22. A: Wassel type 3 thumb duplication in a 2-year-old child. B: The radial digit was hypoplastic and was removed. C:
Intraoperative picture shows the aesthetically pleasing reconstructed thumb.
Thumb Duplication
Although thumb duplication does not often cause a functional problem for the child, the presence of this
prominent hand malformation can have a significant impact on the child’s psychosocial development.
Surgery can be undertaken when the child is about 2 years old to prevent progressive deviation of the
thumb during growth. Thumb duplication can be classified into seven groups, depending on the level of
the duplication. Type I consists of a bifid distal phalanx, whereas type II is a complete duplication of the
distal phalanx. Types III and IV involve the proximal phalanx, and types V and VI involve the
metacarpal. Type VII is triphalangeal thumb or a thumb with three phalanges. Usually the radial, less
developed thumb is removed. Retention of the ulnar thumb has the added advantage of preserving the
3236
No comments:
Post a Comment
اكتب تعليق حول الموضوع