Super-thin Flaps Research Articles

Superthin Anterolateral Thigh Flap for Head and Neck Reconstruction.

This study was performed to clarify whether the superthin anterolateral thigh (ALT) flap is an appropriate choice for head and neck reconstructions requiring thinner and more pliable flaps. Data of patients who underwent head and neck reconstruction from January 2020 to December 2022 were retrospectively collected. Nine patients (4.2%) underwent reconstruction with a superthin ALT flap. All the flaps survived with no cases of total or partial necrosis. Six patients treated with superthin ALT flaps and 15 patients treated with conventional ALT flaps who underwent oral cavity reconstruction were compared. The mean body mass index was significantly higher in the superthin flap group than in the conventional ALT flap group (25.2 vs 21.2kg/m2, respectively; P = 0.04). The rate of postoperative complications requiring debridement was 0% and 13% (P = 0.37). The mean postoperative Hirose score was 9.7 and 8.7 (P = 0.17). The mean postoperative Functional Oral Intake Scale score was 6.7 and 5.9 (P = 0.12). Secondary flap refinement surgery after facial skin reconstruction was performed in 0 of 2 patients (0.0%) in the superthin flap group and 4 of 52 patients (7.7%) in the conventional ALT flap group (P = 0.04). Oral cavity reconstruction with superthin ALT flaps did not increase the incidence of postoperative flap necrosis and resulted in comparable postoperative function. In addition, superthin ALT flaps did not require additional flap refinement surgeries after facial skin reconstruction. The superthin ALT flap is a safe and reliable choice for obese patients with thick thigh subcutaneous tissue.

Choke Anastomosis: A Key Element Acting as a Shunt Converter Between Adjacent Angiosomes.

Choke anastomosis is commonly recognized as a resistance factor that detrimentally affects the hemodynamics of the skin flap; however, its additional potential physiological roles in normal skin function are currently not fully understood. Ten cadaveric forehead flap specimens pedicled with unilateral STAs were perfused with lead oxide-gelatin mixture, and then dissected into 3 layers, including the super temporal fascia-frontalis-galea aponeurotica layer, the subcutaneous adipose tissue layer, and the "super-thin flap" layer. The forehead flap and stratified specimens underwent molybdenum target x-ray and subsequent transparent processing to effectively visualize the microscopic spatial architecture of arterial vessels across all levels. Based on the different anastomoses near the midline area of the flap, 2 types of arterial perfusion were identified: choke anastomosis type (8/10) and true anastomosis type (2/10). The former formed multiple choke anastomoses near the midline. In the "super-thin flap" layer, arterial perfusion density on the ipsilateral side was significantly higher compared to that on the contralateral side. The arterioles on the ipsilateral side exhibited a dense and uninterrupted distribution, whereas those on the contralateral side appeared sparse and dispersed. The latter exhibited an alternative perfusion pattern; the bilateral arterial vessels were connected with 3 to 5 true anastomoses near the midline. Furthermore, the microscopic architecture confirmed a uniform distribution of arterioles that remained continuous from ipsilateral to contralateral sides in the "super-thin flap" layer. This study demonstrated that choke anastomosis not only impairs blood perfusion in the adjacent angiosomes but also acts as a shunt converter to impact the blood supply of distal skin flaps at different levels through the "trans-territory diversion phenomenon." This results in necrosis of the superficial dermis while preserving survival of the deep subcutaneous adipose tissue.

Concentrated growth factor intradermal injection assisted super-thin flap expansion for repairing skin defects: A randomized, single blinded, split-site study.

The super-thin skin flap formed by skin and soft tissue expansion has large area and good ductility, so it can be used to repair skin defects. However, because the flap is thin, the blood flow in the dermis of the super-thin expanded flap is weakened, and flap rupture and necrosis after secondary flap transfer may occur. To compare the skin thickness difference between the expanded ultrathin flaps injected with concentrated growth factor (CGF) and the blank group or saline group. From June 2021 to December 2023, 10 patients (44 sites) with large-area scars or skin tumors were treated, and a single center half randomized controlled trial was conducted. The test site of expander implantation was divided into three groups: intradermal injection of CGF group, normal saline group and blank group. The same amount of expansion was performed every 1-2 weeks, and CGF or normal saline was injected into the dermis every 4 weeks, a total of three times. After 2-3 months of expansion, color Doppler ultrasound was used to measure the skin thickness of each group. Compared with the blank group, the skin thickness of CGF group was 1.75 ± 0.08 mm, and that of BLA blank group was 1.42 ± 0.07 mm, with statistically significant difference (p < 0.0001); In the other group, compared with the saline group, the skin thickness of the CGF group was 1.54 ± 0.08 mm, and the average skin thickness of the saline group was 1.40 ± 0.08 mm, with significant difference between the two groups (p = 0.0067). CGF intradermal injection can increase the skin thickness of super-thin skin flap in the process of soft tissue expansion, which is a safe and effective auxiliary method of skin expansion.

Complex Scalp Reconstruction with Super Thin DIEP Free Flap

Complex Scalp Reconstruction with Super Thin DIEP Free Flap

Feasibility of microsurgery in rural area as part of compulsory health service in Turkey: Replantation, free conventional, perforator, thin, and super thin flaps

Feasibility of microsurgery in rural area as part of compulsory health service in Turkey: Replantation, free conventional, perforator, thin, and super thin flaps

New Approach for Superthin Anterolateral Thigh Flap Elevation.

Anterolateral thigh (ALT) flaps are widely used for soft tissue reconstructions. They have several advantages, most notably a long pedicle, an appropriate pedicle caliber, low donor site morbidity, and the possibility of 2 teams working simultaneously. However, conventional, thick ALT flaps used for reconstructions of head and neck and lower extremity defects may cause postoperative range of motion limitations and cosmetic problems. The aim of this study was to develop and propose strategies to facilitate the harvest of superthin ALT flaps and minimize technical difficulties. This article provides step-by-step instructions for simple, quick, and reliable dissections of superthin ALT flaps. This study retrospectively analyzed data from 60 free superthin ALT flaps used for soft tissue reconstructions in 56 patients between January 2018 and February 2019. Superthin flaps were elevated just above the superficial Scarpa's fascia using a vertical approach. Thirty-eight of the patients were operated on for lower extremity wounds, 16 were for head and neck defects, and 6 were for upper extremity wounds. The mean follow-up period was 7 months. The median hospital stay was 10 days. Total flap loss was observed in 4 cases (6.6%), and partial flap loss was observed in another 4 cases (6.6%). The superthin elevated ALT flap is a reliable and effective option for the reconstruction of soft tissue defects. In our vertical approach, the wide field of view of the flap perforator provides easy dissection, making it easier to elevate the superthin ALT flap.

Use of Customized Thickness Anterolateral Thigh Flap in Head and Neck Reconstruction

Objective: This study demonstrates different techniques of anterolateral thigh flap (ALT) with the appropriate surgical planes according to the thickness of the defect, which have not been previously found in the literature, with our reconstruction experiences. &#x0D; Materials and Methods: A retrospective study was performed including 26 flaps in 25 patients who underwent reconstruction of head and neck defects with different surgical planes of ALT flap including subfascial, superthin, suprafascial, chimeric and composite flaps from March 2017 through December 2020. Flap planes were chosen according to the thickness of the defect, determined during surgery by using caliper. We evaluated the characteristics, flap thicknesses, complications and need of revision surgery in postoperative period. &#x0D; Results: One of the superthin flaps was totally lost; there was not any other flap loss. Three patients died in postoperative period. Although appropriate plane of the flaps was chosen, 4 of all 26 flaps needed revision surgery. One of the patients who was performed lip reconstruction with superthin ALT flap had bulky appearance needed liposuction in postoperative 6 months and 3 patients who received subfascial ALT flaps were performed debulking surgeries. &#x0D; Conclusion: ALT flap is a versatile, reliable flap which can be harvested in different planes according to the thickness of the defect in head and neck region. The ALT flap with convenient thickness provides definitive reconstruction in a single stage without revision surgeries and the most optimal aesthetic results can be obtained.

An Easy Way to Harvest a Superthin SCIP Flap with Long Pedicle: Reappraisal of the Inferolateral Branches of the SCIA.

Despite being the first free flap used in reconstructive surgery, the groin flap slowly fell out of fashion because of its short pedicle length, small vessel diameter, variable vascular anatomy, and bulkiness. Over the years, the authors have found that perforators consistently exist inferolateral to the deep branch of the superficial circumflex iliac artery (SCIA), forming an F configuration with the main branch. The authors propose a new type of superficial circumflex iliac artery perforator (SCIP) flap design based on the perforators derived from these inferolateral branches of the SCIA. These perforators have the advantage of anatomic consistency and can be easily found by making an exploratory incision 2 cm caudal to the inguinal ligament. The perforators of the inferolateral branches extend directly into the dermal plexus, and thus can yield superthin flaps without microdissection defatting. Retrograde dissection allows the surgeon to elongate the pedicle to include a section or full length of the SCIA as needed and involving minimal muscle dissection. SCIP flaps harvested based on the perforators of the inferolateral branches of the SCIA were used successfully for six head and neck reconstructions and two trunk reconstructions with no major complications, including flap loss or lymphedema. The best indications for SCIP flaps based on the inferolateral branches of the SCIA are superficial soft-tissue defects that do not require much volume replacement.

The Transfer of Expanded Forehead Superthin Flap Without Frontalis and Less Hair Follicles Pedicled by Superficial Temporal Vessels.

The expanded forehead flap pedicled with superficial temporal vessel(s) is a common method to treat facial scar deformity. However, local bulkiness and hair retention have limited the use of this flap. Five cadavers were used for anatomy to confirm the forehead "safety zone." A retrospective study was performed on 15 patients with facial scar deformity who were undergoing the expanded forehead superthin flap (without the expanded capsule, frontalis muscle, and with less hair follicles) pedicled with superficial temporal vessel(s) to transfer and repair the deformity. Through cadaver anatomy, the range where the subdermal vascular network laid superficial to the hair follicle level was named the "safety zone," whose average distance between the bilateral penetrating points was 10.2 cm (8.7-11.6 cm). Fifteen patients with facial scar deformity were treated with the superthin flap technique. The trimming size of the safety zone flap was (6-10) × (12-20) cm. The median time of thinning the safety zone was 35 minutes (range, 25-40 minutes). All flaps healed well. The median residual ratio of the hair follicle was 39.8% (29.9%-50.5%). All patients were satisfied with the contour of the flap. We firstly proposed a concept of forehead safety zone and used the superthin flap without the frontalis muscle and less hair follicles to treat facial scar deformity, and obtained an improved therapeutic effect. We think this is an appealing technique that can manifest facial concave and convex in the fine part, improve compliance of the flap, and reduce the times of laser hair removal.

Superthin Flap Harvesting Procedure: Technical Note.

The anterolateral thigh (ALT) flap has been extensively discussed in the literature as it allows for a wide variety and depth of tissues for complex wound coverage. Thanks to many cadaveric and angiographic studies of the subdermal plexus, it is to date ascertained that tailoring ALT thickness can be safely performed without compromising flap outcomes or causing additional morbidity. Recently, the authors applied and described a simpler, safer, and less time-consuming superthin ALT perforator (ALTP) free flap harvesting technique. The aim of this article is to show the versatility of the adipofascial flap harvested around the chosen perforators, which allowed us to safely expand the usage of ALTP superthin flaps.

Use of Doppler Ultrasound for Early Rehabilitation of Replanted Hand and Finger.

We read the article entitled "Using Duplex Ultrasound for Recipient Vessel Selection." by Hong JP, et al. with great interest. 1 They reported that Duplex ultrasound (US) could be a reliable tool for reconstructive surgeons to choose recipient vessels. Since the introduction of new types of flaps such as the perforator-to-perforator flap and superthin flap, detailed evaluation of the vascularity of flap and recipient vessels gets more and more essential and various kinds of US could be applied for preoperative evaluation. US examination is safe for patients, easy to perform, doesn't take much time, and detects very small vessels with a diameter of 0.5 mm. 2 Moreover, at our hospital Doppler US could also be applied to prevent vascular spasms during rehabilitation after finger or hand replantation. Many hand surgeons kept Replanted fingers immobilized for 5 to 7 days after fingers and hand replantation. 3 One of the reasons for this immobilization was that movement of the fingers might cause spasms or thrombosis of anastomotic vessels and lead to necrosis of tissues. However, delayed rehabilitation could cause adhesion of flexor and extensor tendon and joint contractures, and lead to impairment of hand function. Therefore, early mobilization of fingers accompanied with assessments of arterial patency is very important in the field of rehabilitation of finger and hand replantation. To overcome this challenge, we used Doppler US for the assessment of the blood flow of anastomotic vessels during the extension and flexion of joints near the anastomotic area.

Thin and superthin free flaps: An innovative approach to pediatric extremity reconstruction

IntroductionPublished standards for the management of open extremity fractures have improved limb salvage, fracture union, and deep infection rates, but the aesthetic and functional importance of our flap choices has been overlooked. Thin and superthin free flaps exhibit advantages over traditional free flaps in some situations but have seldom been reported in children. The aim of this paper is to present our experience of thin and superthin free flaps in pediatric extremity reconstruction. MethodsChildren (≤13 years) who underwent soft tissue reconstruction using a thin and superthin free flap following major extremity trauma are presented. ResultsFive patients (5 flaps) met the inclusion criteria. The median age was 9 (range 6–13). There were 3 Gustilo IIIB open fractures and 2 multiplanar degloving injuries. The median mangled extremity severity score (MESS) was 4 (range 2–6). The median time from injury to definitive soft tissue closure was 72 h (range 28–120 h). Four anterolateral thigh (ALT) flaps were raised as thin flaps, and 1 superficial circumflex iliac artery perforator (SCIP) was raised as a superthin flap. There was one re-exploration owing to venous congestion, and a second venous anastomosis was performed to enhance flap drainage. The same ALT flap exhibited necrosis at one margin, which was debrided and grafted before discharge. There were no other flap complications. No flap-related secondary surgeries were required. ConclusionThin and superthin free flaps are viable options in pediatric extremity reconstruction. They exhibit excellent aesthetic and functional contouring when a slender fasciocutaneous flap is needed, especially when body habitus renders traditional options unfavorable.

The use of modified glove-like abdominal flap for reconstruction of contracture following burns of dorsal hand and fingers: A case report

Introduction and importanceBurn contracture has been a challenge for its acquired functional disabilities and deformities. Surgical reconstruction poses a significant challenge for optimal aesthetic and functional improvement. Super thin abdominal skin pedicle flap can be used, but it has only one pedicle from one site of abdomen and needs tissue expander for a larger defect. The use of modified glove-like abdominal flap has been stated to be an option mainly for the use on acute hand burn. In this study, application of the modified glove-like abdominal flap was applied to contracture of dorsal hand and fingers.Case presentationA 39-year-old male patient with severe contracted hand, eight-month post-burn injury presented at outpatient clinic Santosa Central Hospital in 2017. Multiple series of surgeries were performed on this patient, consisting of released contracture, defect closure using a modified “glove-like” thin abdominal flap, and flap separation.Clinical discussionAbdominal flap has been the commonly used technique but has the disadvantage of being bulky. Glove-like abdominal flap, a subcutaneous layer plane flap, can be performed simply, safely, and briefly. It has been published mainly for reconstruction for acute burn hand injuries, not for burn hand contracture.ConclusionThe use of modified glove abdominal flap technique for reconstruction in hand burn contracture gives a satisfactory result in terms of functional and aesthetic outcome and can be an option in reconstruction in contracted dorsal hand and fingers.

Using Duplex Ultrasound for Recipient Vessel Selection.

Among the many factors involved in reconstructive microsurgery, identifying a good recipient vessel is one of the key elements leading to a successful result. Multiple modalities have been used to identify recipient vessels from simple palpation of axial arteries to hand-held Doppler, duplex ultrasound, computed tomography angiograms, and other advanced techniques. Although these various modalities bring their own unique advantages, using the duplex ultrasound can provide far superior and real-time information based on the anatomy and physiology of the recipient vessel. Duplex ultrasound is a valuable and powerful tool for reconstructive surgeons who are interested in performing microsurgery or supermicrosurgery. As we enter the era of individualized/customized reconstruction using superthin flaps, perforator-to-perforator anastomosis, and supermicrosurgery, understanding and becoming versatile with duplex ultrasound will be critical especially in choosing recipient vessels.

Different Transfer Forms of the Expanded Forehead Flap Pedicled With Superficial Temporal Vessels to Treat Chin and Submental Scar Deformities.

The chin and submental regions are located at the junction of the face and neck. Its function and aesthetic appearance can be seriously affected when scar deformities cause the cervico-mental angle to disappear. The expanded forehead flap pedicled with superficial temporal vessel(s) is a surgical treatment for chin and submental scar deformities. Different transfer types have developed for this flap based on individual situations. At present, there is no unified treatment strategy for applying this forehead flap to treat different regions and ranges of chin and submental scar deformities. Ninety one cases were collected from patients with chin and submental scar deformities that were treated using the expanded forehead flap pedicled with superficial temporal vessels from January 2008 to December 2018. The authors divided the chin and submental scar deformities into 4 types according to different regions and ranges, and summarized flap survival and complications of 5 different transfer forms used to treat scars for creating feasible treatment strategies. We followed up 76 cases, investigating the satisfaction of appearance and texture of the flaps, improvement of neck movement, and scar recurrence. Expanded forehead flaps were used to repair 91 cases of chin and submental scar deformities. According to the postoperative flap survival and complications of flap blood supply, the treatment strategies are as follows: Bilateral cutaneous and subcutaneous pedicled forehead flaps are applied to treat scars in bilaterally symmetrical large-scale scars in Zone LCL. Unilateral pedicled forehead flaps are applied to treat small-scale scars in Zone C and Zone L. Unilateral pedicled plus contralateral vascular anastomosis and unilateral pedicled plus contralateral super thin forehead flaps are applied to treat the moderate-scale scars of Zone LC. Mean follow-up period was 81 months (range 28-131), 93.4% (71/76) was satisfied with appearance and texture of the flaps, 97.4% (74/ 76) was satisfied with the improvement of neck movement, and 2.6% (2/76) occurred scar recurrence. Five different types of expanded forehead flaps pedicled with superficial temporal vessels can be used to repair differential scar deformities of the chin and submental regions and achieve good therapeutic effects.

Super-thin ALT flap elevation using preoperative color doppler ultrasound planning: Identification of horizontally running pathway at the deep adipofascial layers

Presently, super-thin ALT flap, which is elevated above the superficial fascial plane, is gaining popularity. Although there is a huge demand for thin flaps for various types of extremity reconstruction, the technique for ALT flap thinning remains controversial. In this study, we investigated the distance and vector between penetrating points of perforators in deep and superficial fascia using color duplex and clinical measurement to suggest a reliable super-thin flap elevation technique. From June 2018 to February 2020, 44 patients with various types of defects who were treated using super-thin ALT flaps were enrolled; 69 surgically detected perforators were analyzed. All patients' flap outcomes and characteristics of the perforators were analyzed. In addition, the effects of patients' body mass index (BMI) and thickness of super-thin flap were evaluated. The average traveling length of perforator at the deep adipofascial layer (DAL) was 2.43cm, and the vector of traveling was randomly arranged. The mean thickness of super-thin ALT flap was 6.8mm. The thickness of super-thin flap was not significantly correlated with patients' BMI (ranged from 17.4 to 34.2kg/m2; p=0.183). The novel elevation technique for super-thin ALT might be useful, as evidenced by perforator traveling distance and vector in DAL. Preoperative color duplex ultrasonography is helpful to detect the running course of the perforators during elevating the flap. This anatomic concept must be considered to obtain the reliability of the super-thin ALT flap.

A fabricated chimeric SCIP flap with end-to-side anastomosis: A case report

Superficial circumflex iliac artery perforator flap (SCIP) is one of the most convenient flaps to cover distal extremity defects because it conceals the scar of the donor area well and can be raised as a thin or super-thin flap. In recent years, various chimeric SCIP flaps were reported, including the sartorius muscle, the lateral femoral cutaneous nerve, and the iliac bone. However, chimeric SCIP flap is sometimes difficult to be raised on one pedicle, because of the absence of communication between a skin branch and a branch to a chimeric tissue. We present a case in which end-side anastomosis of a sartorius muscle perforator to a SCIP flap pedicle is made to form a fabricated chimeric SCIP flap due to variation in the pedicle. This design aims to fill cavitary spaces and supply better perfusion for infection control.

Subdermal Dissection for Elevation of Pure Skin Perforator Flaps and Superthin Flaps: The Dermis as a Landmark for the Most Superficial Dissection Plane.

Pure skin perforator and superthin flaps have been reported and are becoming popular, as they allow one-stage thin skin reconstruction even from a thick donor site. However, currently reported elevation procedures use proximal-to-distal dissection requiring free-style perforator selection and primary thinning procedures. With distal-to-proximal dissection using the dermis as a landmark for dissection plane, it is expected that elevation of pure skin perforator or superthin flaps can be simplified. Patients who underwent pure skin perforator or superthin flap transfers with the subdermal dissection technique were included. Flaps were designed based on location of pure skin perforators visualized on color Doppler ultrasound, and elevated just below the dermis under an operating microscope. Medical charts were reviewed to obtain clinical and intraoperative findings. Characteristics of the patients, flaps, and postoperative courses were evaluated. Thirty-six flaps were transferred in 34 patients, all of which were elevated as true perforator flaps (superficial circumflex iliac artery perforator flap in 29 cases, other perforator flaps in seven cases). Mean ± SD flap thickness was 2.24 ± 0.77 mm (range, 1.0 to 4.0 mm). Skin flap size ranged from 3.5 × 2 cm to 27 × 8 cm. Time for flap elevation was 27.4 ± 11.6 minutes. All flaps survived without flap atrophy/contracture 6 months after surgery, except for two cases of partial necrosis. The subdermal elevation technique allows straightforward and direct elevation of a pure skin perforator or superthin flap within 30 minutes on average without the necessity of primary thinning. Therapeutic, IV.

A Safer Way to Harvest a Superthin Perforator Flap

The updated knowledge of perforasome anatomy and the evolution of microsurgical techniques have enabled surgeons to safely harvest a thin flap. Recently, the anterolateral thigh perforator flap, the current workhorse in soft-tissue reconstruction, has started to be designed and harvested on the superficial fascia, which divides the deep from the superficial fat. This allows elevation of a very thin flap tailored to the defect. Faithful to the ultrathin concept, in an attempt to make flap dissection simpler and safer, the authors describe a revisited harvesting technique of superthin anterolateral thigh perforator flap. This study presents the outlined technique performed in 16 patients with complex soft-tissue defects after trauma or tumor ablation. All of them underwent primary reconstruction using superthin anterolateral thigh perforator free flaps by superficial fascia elevation harvested according to the described surgical procedure. Complications and functional outcomes were assessed. The authors' series of anterolateral thigh perforator superthin flaps demonstrated an overall 100 percent survival rate. Of 16 anterolateral thigh perforators, 12 (75 percent) had no complications and four (25 percent) had minor complications. No major complications such as total flap loss requiring additional salvage surgery were reported. In no case was secondary debulking performed. The superthin anterolateral thigh perforator flap harvested with the described approach was used successfully in microsurgical reconstruction, providing an excellent outer skin cover tailored to the defect. The dissection procedure was safe, quick, simple, and free of major complications. With minimal donor- and recipient-site morbidity, it provided great aesthetic results, avoiding secondary operations. Therapeutic, IV.

Reconstruction of lower lip defects with free super-thin anterolateral thigh flap.

Lower lip is a vital organ with important functions as well as aesthetic importance. It is critical to provide an aesthetically appealing lower facial subunit with maintenance of understandable speech and oral competence. Achieving these targets is very difficult especially in total lower lip defects. This report presents a technique using super-thin anterolateral thigh (ALT) flaps with fascia graft for reconstruction of large, complex oral sphincter defects. Six patients with squamous cell carcinoma (SCC) and one patient with a gunshot injury were presented in this report. All of them had full-thickness defects including skin, orbicularis muscle and oral mucosa. The mean age was 58 (range, 32-85) years. Defects of the lower lip were reconstructed with a super-thin ALT flap. Super-thin flaps were obtained by planning as close to the knee as possible and elevating at the level of superficial fascia. The fascia graft was used for achieving lip suspension. Overall flap survival was 100%. The flap size ranged from 8 × 6 cm to 14 × 10 cm. The follow-up periods ranged from 6 to 14 months. All the patients achieved acceptable oral competence, both in the resting condition and during speaking and eating, except for one patient who had a drooping lower lip developed in the post-operative 3rd month and underwent a secondary tightening procedure. Another patient needed liposuction due to bulky appearance. Super-thin ALT flaps seem to be a useful option for functional and aesthetic reconstruction of extensive lip defects.