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1.
B Guyuron B Michelow R Schmelzer T Thomas MA Ellison 《Canadian Metallurgical Quarterly》1998,101(3):816-819
Combining facial rhytidectomy with laser resurfacing, theoretically, provides the best opportunity for achieving an optimal facial rejuvenation result. Previous studies have demonstrated the pernicious effect of a deep peel on a skin flap, but the safety of treating the rhytidectomy flap with laser has not been investigated. This study was conducted to investigate the safety of using these techniques concomitantly. Sixty sites were selected on three Yucatan minipigs, a species of swine chosen because of its hairless nature and opportunity to raise a true skin flap (without the panniculus carnosus). The healing time of 20 laser-treated sites without flap elevation was compared with that of 20 areas treated with laser following flap elevation, shortening (to emulate a more realistic rhytidectomy process), and repair. Twenty flaps were elevated and shortened without laser treatment to serve as a control. The CO2 laser parameters were set at 500 mJ, 50 watts, and a density of 5. Two passes were made to penetrate the upper dermis. The mean healing time for areas treated with laser alone was 12.05 days, ranging from 11 to 14 days. In comparison, the healing time for the laser-treated areas subsequent to flap elevation averaged 17.95 days, with a range of 14 to 24 days (p < 0.05). Two flaps treated with laser (10 percent) failed to heal completely in 24 days. At the time that all 20 of the areas treated solely with laser had re-epithelialized completely, only one of the flaps treated with laser had re-epithelialized completely (p < 0.001). A delay in healing, as well as return of pigment, was demonstrated in the distal portions of all flaps receiving laser treatment. The control flaps all healed normally except for a 5-percent superficial loss on a single flap. It was concluded from this study, and from clinical observation of delayed healing on six of seven patients who underwent concomitant rhytidectomy and laser resurfacing at a conservative laser setting, that laser resurfacing of the rhytidectomy flap is unsafe and results in delayed re-epithelialization. This combination should be avoided altogether or performed with extreme prudence on patients undergoing a deeper plane facial rhytidectomy or by using very low laser settings. 相似文献
2.
The distally based forearm island flap is vascularized by the perforators of the distal radial artery. The skin flap is along the axis of the radial artery, and the pivot point of its subcutaneous pedicle is about 2 to 4 cm above the radial styloid process. We have treated 12 patients with 12 flaps for soft-tissue defects of the hand. Of these recipient sites, seven were in dorsal hands, two were in thumbs, two were in forearms, and one was in the palmar area. The donor-tissue variants included eight skin flaps, two adipofascial flaps, and two sensate flaps. The sizes of the flaps ranged from 6 x 4 cm to 14 x 6 cm. The donor site wound could be closed primarily in five patients. Two sensate flaps, innervated by the lateral antebrachial cutaneous nerve, could provide sensation for thumb reconstruction. The advantage of this flap is its constant and reliable blood supply without sacrifice of the main radial artery. The elevation of the flap is simple and rapid. There is the potential that this flap can be used as an innervated flap, and there is no need of microsurgical technique. 相似文献
3.
The overall objective of this study was to investigate how a strategic delay procedure could generate large flaps survival. On the basis of the vascular anatomy in 10 rats, a long three-territory skin flap spanning the length of the rat dorsum was designed. This flap was distally based on the deep circumflex iliac artery. The adjacent territories consisted of a large perforator of the posterior intercostal artery and the lateral thoracic artery in sequence. Two different vascular delay procedures were used and compared in nine animals. One dorsal midline incision was used to perform the two different delay procedures. The limited delay technique was performed by ligating a large cutaneous perforator of the posterior intercostal artery on one side of the rat. The extensive delay procedure was completed by ligating the cutaneous perforators of the posterior intercostal artery and the lateral thoracic artery on the other side of the rat. After a delay period of 10 days, the paired flaps were elevated, respectively, and sutured back in place. Seven days later, the area of viable skin flap was measured by the paper template technique. The animals were then killed, and the dorsal skin arteriograms were obtained by injecting a lead oxide mixture. Vascular changes of the paired flaps were assessed. In the extensive delay group, 100-percent survival was seen in four animals and distal partial necrosis was observed in five animals. The average survival area in the extensive delay group was 85.5 +/- 14.2 percent (mean +/- SD), whereas the flaps in limited delay group showed 100-percent survival in all animals (p < 0.05). In flaps that survived completely, the choke vessels among three vascular territories anastomosed throughout the flap. In the partially necrotic flaps, some choke and true anastomoses existed between the deep circumflex iliac and the posterior intercostal artery territories and the flap necrosis occurred in the third territory. This study suggests that the limited delay technique (ligation of one artery in the territory adjacent to the base of the flap) was the more effective delay procedure in the rat dorsal skin flap model. 相似文献
4.
The posterior interosseous artery is located in the intermuscular septum between the extensor carpi ulnaris and extensor digiti minimi muscles. The posterior interosseous artery is anatomically united through two main anastomoses: one proximal (at the level of the distal border of the supinator muscle) and one distal (at the most distal part of the interosseous space). In the distal part, the posterior interosseous artery joins the anterior interosseous artery to form the distal anastomosis between them. The posterior interosseous flap can be widely used as a reverse flow island flap because it is perfused by anastomoses between the anterior and the posterior interosseous arteries at the level of the wrist. The flap is not reliable whenever there is injury to the distal forearm or the wrist. To circumvent this limitation and to increase the versatility of this flap, we have refined its use as a direct flow free flap. The three types of free flaps used were (1) fasciocutaneous, (2) fasciocutaneous-fascia, and (3) fascia only. Described are 23 posterior interosseous free flaps: 13 fasciocutaneous flaps, 6 fasciocutaneous-fascial flaps, and 4 fascial flaps. There were 13 sensory flaps using the posterior antebrachial cutaneous nerve. The length and external diameter of the pedicle were measured in 35 cases. The length of the pedicle was on average 3.5 cm (range, 3.0 to 4.0 cm) and the external diameter of the artery averaged 2.2 mm (range, 2.0 to 2.5 mm). The hand was the recipient in 21 patients, and the foot in 2. All 23 flaps covered the defect successfully. 相似文献
5.
Angiosomes are blocks of tissues, composed of the integument and underlying deep structures, supplied and drained by a named artery and its accompanying vein. The purpose of the current study is to describe a new principle, which allows extension of the territory of an angiosome into the adjacent angiosome, thus enabling the creation of a large skin flap (arteriovenous cross-flow flap). Epigastric skin flaps, measuring 8 x 8 cm, were raised in 30 Sprague-Dawley male rats. In group A (single-pedicle flap), the flaps were based on the epigastric artery and vein on the ipsilateral side, and the contralateral pedicle was divided. In group B (cross-flow flap), the epigastric vein on the ipsilateral side and the epigastric artery on the contralateral side of the flap were divided. In group C (skin graft), the vascular pedicles were divided bilaterally. A definitive assessment was made on the seventh day. Digital images of the flaps were analyzed using an imaging software and the areas of skin survival and necrosis were determined. Lead oxide microangiogram was performed in another set of flaps both acutely and 1 week after flap elevation. The percent survival flap area in group A was 69.94, in group B was 89.07, and in group C was 13.00. All the groups are statistically different, with a p value < 0.001. The microangiograms showed striking differences in the vascular pattern in the cross-flow and the single-pedicle flaps. It is clearly demonstrated that the arteriovenous cross-flow flaps have increased survival of skin when compared with the conventional axial-pattern flaps. 相似文献
6.
EJ Wozniak LJ Lowenstine R Hemmer T Robinson PA Conrad 《Canadian Metallurgical Quarterly》1996,46(5):507-515
The medial thigh flap is a perforator-based flap nourished with septocutaneous or muscle perforators originating from the femoral vessels. To date, 8 patients have been repaired with this flap and extended or connected flaps including this flap: 4 patients with lower leg defects and 4 patients with intraoral and neck defects. The advantages of this flap are (1) several pedicle perforators exist for this flap, which makes possible duplicated vascular anastomoses to establish reliable circulation of the transferred flap; (2) the flap can be extended or connected to other neighboring flaps in the anterior thigh, so that extensively wide defects can be closed in one stage; (3) the great saphenous vein can be simultaneously used as a vein graft or for venous drainage for the flap; (4) the anterior branch of the femoral nerve can be used for sensory potential; and (5) there is minimum morbidity of the donor defect and a large dominant vessel for the leg can be preserved. The suitable indications for this flap are defects after removal of skin cancer in the foot or lower leg and wide defects after resection of head and neck cancer, which can be reconstructed with the flap connected to neighboring skin flaps. The disadvantages of this flap are that it has a small, short vascular pedicle and the bulkiness of the flap's fatty tissue often requires thinning. 相似文献
7.
The abdominal flap of the rat has become a popular model with investigators. Recently, researchers have been reporting survival of skin flaps with varying blood supplies. We studied the viability of skin flaps on a consistent model with varied blood supply. An 8 x 9 cm flap was raised in 40 male Sprague-Dawley rats. The viability of the flaps could be studied in 25 rats. The survival of a pedicled flap based on the left inferior epigastric artery and vein was compared with that of a pedicled flap with enhanced venous drainage. The survival of a venous flap based on the paired inferior epigastric veins and the paired long thoracic veins was compared with that of an arterialized venous flap. A composite graft was used as a control for all groups. A qualitatively improved survival was found in the pedicled venous-enhanced group (66 percent) compared with the pedicled flaps (56 percent) (p > 0.05). An improved survival was found in the arterialized venous flap (57 percent) compared with the venous flap (40 percent) (p < 0.05). All flaps had improved survival compared with the composite graft (0.6 percent) (p < 0.05). 相似文献
8.
S McNally 《Canadian Metallurgical Quarterly》1995,4(2):87-89
In this experiment 12 piglets were used to study the survival length and free radical production of subdermal vascular network thin skin flap, fascial flap and PSVN. The flap or graft was designed 15 cm x 3 cm in size on the flanks of the animals. Twenty-four flaps or grafts were formed in each group. The observation on 7 postoperative day indicated that the survival length of the subdermal vascular network thin skin flap was 38% over that of fascial flap, while the free radical was less in the former, and it could be one of the reasons for its better survival. 相似文献
9.
This study demonstrates that acute mainstream cigarette smoke exposure is deleterious to dorsal random-pattern skin flap survival in the rat. Three vasodilators were also studied for their ability to mediate flap survival after smoke exposure. Sprague-Dawley rats (10 per group) were exposed to two cigarettes per day over a 14-day period. This is an exposure equivalent to that of an average cigarette smoker. Dorsal McFarlane caudally based random-pattern skin flaps (4 x 10 cm) were created on day 7 of the smoke exposure. Enteral phenoxybenzamine (0.56 mg per kilogram per day), enteral nifedipine (10 mg per kilogram per day), and topical nitroglycerin (1.3 cm or 7.5 mg per day) were administered after creation of the dorsal skin flaps in two doses daily during smoke exposure. Fluorescein was used to delineate areas of viability accurately. A pad digitizer was utilized to calculate designated skin flap areas to +/-1.0 mm2. Experimental animals demonstrated a 23% decrease (p < 0.01) in skin flap area survival compared with the control animals. The phenoxybenzamine group demonstrated a 5.5% increase in flap area survival (p=0.068), the nifedipine group demonstrated a 4.1% increase in flap area survival (p=0.049), and the nitroglycerin group demonstrated an 8.9% increase in flap area survival (p=0.049). These data suggest that phenoxybenzamine appears to affect skin flap survival marginally after smoke exposure. However, nifedipine and nitroglycerin improve random-pattern skin flap survival significantly after mainstream cigarette smoke exposure in the rat. These results imply that pharmacological intervention with vasodilators may ultimately prove clinically useful for random-pattern skin flap salvage in the cigarette-smoking patient. 相似文献
10.
Since 1987 we have successfully used thoraco-umbilical skin flaps as free transplants to repair 8 cases of severe burn scar deformities of jaw-neck and hand regions, thoraco-umbilical insular skin flaps to each case of congenital vaginal atresia, severe vulval scar due to sulfuric acid burn and large penal tissue defect accompanied with severe urethral leakage. This flap has the following advantages: namely definite anatomical position, larger vascular diameter, fight large skin flap area, and similar skin completion as that of the jaw-neck region. Therefore they are the ideal substitute for the repair of soft tissue defects of jaw-neck region as well as extremities. The flap has long vascular pedicle, abundant vascularization, easy transportation and it is suitable to be a retrograde insular flap for repairing of vulval tissue defect, reformed penal vaginoplasty. 相似文献
11.
K Kiyokawa Y Tai HY Tanabe Y Inoue T Yamauchi H Rikimaru K Mori T Nakashima 《Canadian Metallurgical Quarterly》1998,102(7):2336-2345
The present article describes a method that preserves circulation during the preparation of the pectoralis major myocutaneous flap used in head and neck reconstruction. The major disadvantage of this flap is its poor circulation and consequent partial necrosis. To solve this problem, we analyzed the circulation and hemodynamics of the pectoralis major myocutaneous flap (the perforator of the anterior intercostal branch located about 1 to 2 cm medial to the areola in the fourth intercostal space is important), evaluated the safe donor sites in the chest wall for a skin island (the perforator is included on the skin island's central axis), improved the surgical procedure for elevating flaps (for preventing perforator injuries), and devised a means to transfer flaps, thereby increasing the range of the flaps (the transfer route is under the clavicle). Using this technique, head and neck reconstruction was performed on 62 patients. The diagnosis included oral cancer (21), oropharyngeal carcinoma (10), parotid carcinoma (10), hypopharyngeal carcinoma (9), and other head and neck malignant tumors (12). Of these, partial or marginal necrosis of the flap caused by circulatory problems was detected in three patients (5 percent). Using our method, the problems associated with inadequate circulation in the pectoralis major myocutaneous flap were greatly alleviated, thus reconfirming the usefulness of this flap in head and neck reconstruction. 相似文献
12.
H Uesugi H Shimizu N Arai H Matsuda H Nakayama T Maehara T Onuma A Yanashita 《Canadian Metallurgical Quarterly》1998,50(3):253-257
The advantages of the free TRAM flap over the conventional Tram flap are known. The use of its main pedicle--the deep inferior epigastric system--improves the blood supply, decreasing the risk of skin and fat necrosis. The harvesting of 5-7 cm of muscle, and the preservation of its lateral border decreases the risk of abdominal wall bulge or hernias. Delayed breast reconstructions in patients submitted to radiotherapy were performed by end to side anastomosis between flap vessels and axillary vessels, avoiding the thoracodorsal irradiated vessels, and improving the blood flow. Ten patients were submitted to breast reconstruction by free TRAM flaps. There was one total flap necrosis, and one delayed healing around the periumbilical suture. Neither skin nor fat necrosis were seen. One patient developed an abdominal wall bulge. Two patients presenting tumor metastasis abandoned the plastic surgery outpatient clinic. Two patients refused the nipple-areolar complex (NAC) reconstruction. The outcome of five NAC reconstructions was very good, breasts being symmetrical without an opposite breast operation. 相似文献
13.
GG Hallock 《Canadian Metallurgical Quarterly》1997,100(6):1428-1433
Just as the dogma that skin flap survival depends on rigid length-to-width ratios has been refuted as a consequence of advances in understanding the anatomical basis of the cutaneous circulation, the generalization that distally based flaps are inherently inferior to proximally based flaps also deserves to be challenged. All else being equal, the truly critical factor for flap viability in either case is the nature of their intrinsic blood supply rather than any arbitrary configuration or orientation. Previous laboratory evidence has proved this fact and is now further validated by a clinical experience with 194 local fascia flaps in 174 patients. There was a 22.2 percent overall incidence of complications, but no statistically significant difference in this rate was observed whether the flap was distally based (18.8 percent of 16 flaps) or proximally based (23.5 percent of 162 flaps) (p = 0.669). Major complications, usually a failure of the intended coverage, actually were more common for proximally based flaps (12.9 percent) than those distally based (6.3 percent), although not statistically different (p = 0.436). Bipedicled fasciocutaneous flaps, which should have had augmented perfusion from their dual sources of inflow, sustained complications in 12.5 percent of 16 flaps. Although none was classified as a major problem, again no difference was apparent when compared with proximally based (Pprox = 0.316) or distally based (pdis = 0.626) flaps. Some caution is prudent in interpreting these retrospective data, not because of an admitted bias for more frequent selection of proximally based flaps, but because the choice for any of these local fasciocutaneous flap always followed a careful assessment of the status of the fascial plexus adjacent to any defect. Audible or color Doppler ultrasound localization of available cutaneous perforators can predetermine the feasibility of any option, thereby ensuring a reasonable success rate regardless of pedicle orientation. 相似文献
14.
JL Ducours 《Canadian Metallurgical Quarterly》1998,43(6):664-667
The author describes a new procedure of coverage of the medial canthus: paralateronasal flap. It is a cutaneous rotation-advancement flap with random vascularisation ensured by the dermal vascular plexus. It is vertical and S-shaped. Its first curve is concave laterally and ascends widely to the lateronasal area, and its second lower curve is concave medially, following the nasolabial fold. This flap has been used 14 times, mostly to repair defects caused by excision of skin cancers of the medial canthus. Mean follow-up is 18 months. The aesthetic results obtained are very satisfactory. The author compares the advantages of the paralateronasal flap with present techniques and thinks that this new flap should find its place in the therapeutic arsenal for repair of the medial canthus. 相似文献
15.
SF Ma JG Garcia U Reuning SP Little NU Bang EP Dixon 《Canadian Metallurgical Quarterly》1997,129(6):611-619
We propose that a long-term cure for the recalcitrant chronic venous ulcer must involve a dual surgical approach including (1) wide excision of the ulcer and surrounding liposclerotic tissue bed, and (2) replacement by a free flap containing multiple, competent microvenous valves with a normal microcirculation. Advantages of free flaps over skin grafting include improvement of the underlying pathophysiology; increase in blood supply to the area; ability to cover exposed bone, joint, or tendon; and a lower incidence of recurrence. During the past 8 years, 20 consecutive muscle free flaps were performed in 18 patients for 19 recalcitrant venous ulcers (two "sequential" flaps to the ipsilateral leg in 1 patient and a repeat flap after initial failure in 1 patient). Twelve males and 6 females ranged in age from 17 to 76 years (mean, 44 years). Nontraumatic, nonosteomyelitic venous ulcers had been present for an average of 3.5 years (range, 1-10 years) and failed an average of 2.4 skin grafts (range, 0-6 grafts). Defects ranged from 100 to 600 cm2 (mean, 238 cm2). Donor tissues included rectus abdominis (N = 13), latissimus dorsi (N = 5), gracilis (N = 1), and serratus (N = 1) muscles. Recipient vessels included posterior tibial (N = 12), anterior tibial (N = 6), and peroneal (N = 2). In all instances except one, only one vein, usually one of the venae comitantes, was anastomosed in end-to-end fashion. Successful free tissue transfer was accomplished in 18 of 20 flaps (90%). Complications included infection with partial flap and/or skin graft loss (three flaps), and partial skin graft loss (two flaps). There were no recurrences within the flaps; however, breakdown occurred at the junction between the flap and residual adjacent liposclerotic skin in 1 patient. Follow-up average 32.7 months (range, 8-65 months); 3 patients were lost to follow-up. Free muscle transfer can provide a long-term cure for the recalcitrant venous ulcer by replacing the diseased tissue bed with healthy tissue containing multiple, competent microvenous valves and a normal microcirculation. This can be accomplished in one reconstructive procedure with excellent long-term results. 相似文献
16.
BACKGROUND: Among the myocutaneous island flaps applied for reconstruction of large soft-tissue defects after ablative surgery for malignomas, the pectoralis major flap is the one most frequently used. In comparison, the sternocleidomastoid myocutaneous island flap is not as popular. METHODS: We report on our experiences with the superiorly based sternocleidomastoid myocutaneous (SCM) island flap (cutaneous island of 6-8 cm in diameter) in seven consecutive cases after resection of malignomas of the oral cavity and the pharynx. The vascularization from the occipital artery is additionally supplied by preserving the platysma during preparation of the SCM flap. RESULTS: Only one total cutaneous necrosis was observed in a patient who had received prior radiation. In the other 6 cases no major complications (necrosis or fistula) occurred. CONCLUSION: When the preservation of the sternocleidoid muscle does not compromise oncologic principles as in cases with limited lymphe node involvement (N0-N1), the SCM flap appears to be a useful and simple technique, particularly in female patients compared with the pectoralis major flap, in addition to others. 相似文献
17.
Our experience points to the advantages of preserving a cutaneous flap remaining after mastectomy followed by one-stage reconstruction using a recto-abdominal flap of silicone expanders and endoprostheses. The procedures used provided for removal of the halo-papillary complex, skin scarred by biopsy, the entire mammary gland tissue with the subaxillary, subclavicular and subscapular lymph nodes. The epithelium was removed from the recto-abdominal flap which was placed into a cutaneous pouch after mastectomy. A small round piece of the flap skin replaced the defect caused by halo removal. As a result, both breasts were practically symmetrical and identical in volume. When silicone implants are used, the skin pouch is filled with an expander installed under musculus pectoralis major. Since October, 1995, 26 such operations have been carried out. 相似文献
18.
To evaluate the histologic changes attendant on tissue expansion in the guinea pig, self-inflating implants were placed in the dorsal subcutaneous space and the tissue response was sequentially studied at periods ranging from 1 to 18 weeks. Fixation artifacts have been minimized. The cellular response is relatively benign. The epidermis does not undergo thinning during expansion, although dermis and panniculus carnosus become significantly thinner. Atrophy of panniculus muscle is demonstrable. This study supports the hypothesis that tissue expansion results in a net gain of donor tissue. 相似文献
19.
The experience in immediate reconstruction of oral maxillofacial defects of 23 cases by island trapezius myocutaneous flaps from April 1985 to July 1993 is presented. The smallest flap was 6 x 4 cm and the largest 12 x 8 cm, with all the cases successful. The selection of the vascular pedicle of the myocutaneous flaps, the technique of the operation, the advantages and the disadvantages of the method are discussed. 相似文献
20.
Clinical experience and indications of the free serratus fascia flap: a report of 21 cases 总被引:1,自引:0,他引:1
AH Schwabegger H Hussl C Rainer H Anderl MM Ninkovi? 《Canadian Metallurgical Quarterly》1998,102(6):1939-1946
The free "serratus fascia" flap as a free flap was first described by Wintsch and named a free fascia flap of gliding tissue; however, it has not yet been given a distinct name. The particular advantages of this flap consist of an easy access and a low donor-site morbidity without functional deficit. Additionally, it may be designed very variably and molded even three-dimensionally as a tendon wraparound flap or folded to fill up cavities. In our clinic, we used this flap in 21 patients for distinct indications and in 7 patients as a vascular graft in fingers or great toe with a minimal adjacent layer of gliding tissue around the vessels for the treatment of cold intolerance after finger replantation or severe finger or toe trauma. In the other cases, this versatile flap served for the coverage of traumatically exposed tendons or bones at the extremities, covered with a skin graft. Eighteen flaps survived completely, whereas 3 flaps developed partial or superficial necrosis. Only once did a major complication by unintentional sacrification of the long thoracic nerve during flap harvesting occur, resulting in a wing scapula. We recommend this flap for defect cover at sites where a thin vascularized gliding layer for defect cover is needed, especially in distal extremities with exposed tendons or nerves, and present the current indications in discussing our experiences. 相似文献