Superficial Circumflex Iliac Artery Perforator Flap: An Anatomical Study of the Correlation of the Superficial and the Deep Branches of the Artery and Evaluation of Perfusion from the Deep Branch to the Sartorius Muscle and the Iliac Bone

Immediate foot reconstruction and revascularization of toes using an interposition superficial circumflex iliac artery perforator flow-through flap: A case report

Foot injuries, particularly degloving injuries, can lead to segmental loss of neurovascular structures in the toes, making simultaneous reconstruction of both the foot and toes challenging. This case report presents a technique using the superficial circumflex iliac artery perforator (SCIP) flap for immediate reconstruction of the dorsal foot and revascularization of multiple toes. A 28-year-old man suffered a degloving injury on the dorsum of his foot resulting in a 9 × 6cm skin defect, open fracture dislocations, exposure of tendons, and neurovascular injury, which included a 6-7.5 cm segmental defect of the vessels supplying the first, second, and third toes leaving all three toes ischemic. Immediate reconstruction was performed by harvesting a 12.5 × 5cm SCIP flap including both the superficial and deep branches and incorporating the superficial inferior epigastric vein (SIEV). The SCIP deep branch was used to revascularize the third and second toes and the SIEV vein graft used for the first toe. The patient recovered well, no complications were observed at the 2-year follow-up, preserving all three toes and regaining mobility. The use of the SCIP flap as a flow-through flap provides thin skin flap cover, good vessel caliber size match with digital vessels and reduces the need for vein grafts from distant sites improving surgical efficiency. These attributes make the flow-through interposition SCIP flap an excellent choice for reconstructing foot defects and revascularizing toes. We report this case to demonstrate the utility of the SCIP flap in immediate soft tissue cover and digit revascularization.

Repair of a "long and narrow" skin defect of the upper extremity with a modified design of a compound SCIP flap: a series of 12 cases

BACKGROUND

Large skin lesions of the upper extremity tend to be ''long and narrow'' in shape, and the currently used repair and reconstruction protocols still have some drawbacks, including difficulty in closure of the donor area, poor cosmetic appearance of the donor and recipient areas, and low flap survival rates. The ilioinguinal flap has been more widely used for repair and reconstruction of various complex conditions. In order to improve the versatility of the flap design and to achieve better aesthetic results, we report a study on the improved design of Compound SCIP flap for repairing "long and narrow" large skin defects of the upper extremity by using a modified design of the ilioinguinal flap for the procurement of perforating blood vessels and flap excision.

METHODS

From April 2005 to August 2015, a total of 12 patients underwent this modified design procedure, in which the anterior branch of the fourth lumbar artery or the posterior intercostal artery was selected to provide blood supply for the perforator flap together with the superficial branch of the superficial iliac artery to meet the blood supply needs of the flap for the one-time repair of a large "long and narrow" skin defect in the upper limb. Patient demographics, flap characteristics, and associated complications were retrospectively analyzed.

RESULTS

3 females and 9 males were included in this study, the mean age of the patients was 31.7 years (range, 22-44 years), the mean follow-up period was 15.3 ± 5.6 months (range, 7-24 months), and all patients had complete closure of the defect site and donor area, and all flaps survived.

CONCLUSIONS

The Compound SCIP flap presents some advantages in repairing 'long and narrow' skin defects in the upper limb. While ensuring the survival rate of the elongated ilioinguinal flap, it amplifies the benefits of the ilioinguinal flap and enhances skin utilization. This can serve as a beneficial choice for repairing 'long and narrow' skin defects in the upper limb.

Free Chimeric Superficial Circumflex Iliac Artery Perforator Flap in Reconstructing the Distal Complex Extensor Tendon Injury

SUMMARY

The distal complex extensor tendon injury, presenting as traumatic skin, zones 1 and 2 of extensor pollicis longus and extensor hallucis longus, and bony insertion loss, represents a challenging issue and requires a well-vascularized skin paddle, tendinous graft, and insertional reconstruction. Guided by the all-in-one-step reconstruction rule, the chimeric superficial circumflex iliac artery perforator (SCIAP) flap, generally considered as a promising multiple-type tissue provider (eg, vascularized skin paddle, fascia, iliac flap), can fulfill the reconstructive demands and has an edge over the two-stage countermeasure. The authors adopted tripartite SCIAP flaps to reconstruct distal complex thumb or toe injuries in eight cases (six thumbs and two halluces), all of which were reattached with vascularized fascia lata-iliac crest conjunctions using a pull-out technique. All SCIAP flaps survived uneventfully without donor-site complications. The remodeled interphalangeal joints regained nearly normal radiologic manifestation. The chimeric SCIAP flap may be a promising technique for distal complex extensor tendon injury; providing vascularized skin paddle and fascia lata-iliac crest graft, it also qualifies for the all-in-one-stage reconstruction concept.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Introduction and preliminary application report for a novel 3D printed perforator navigator for fibular flap surgery

The aim of this study was to introduce and report on a 3D-printed perforator navigator and its clinical application. Integrated imaging and 3D printing techniques were employed for the design and manufacture of a perforator navigator. Key techniques included establishing a digital image coordinate system, localizing perforator fascia piercing points, creating a reference plane for the perforator course, and projecting the perforator course onto the body surface. All cases of maxillofacial defect repaired with free fibular myocutaneous flaps, from January 2019 to January 2022, were reinvestigated. Patients treated using traditional perforator localization methods were assigned into group Ⅰ, while those who had a navigator used during treatment were allocated to group Ⅱ. Outcome measurements included perforator positioning accuracy, perforator preparation time (PT), and flap growth score. Capillary refilling time and degree of flap swelling were recorded on the 1st, 3rd, and 7th days after surgery. On the 10th day after surgery, the flap survival situation was graded. In total, 25 patients were included in the study. Perforator preparation time for group Ⅱ was significantly less (p ＝ 0.04) than for group Ⅰ (1038.6 ± 195.4 s versus 1271.4 ± 295.1 s. In group Ⅱ, the mean positioning deviation for the perforator navigator was 2.12 cm less than that for the high-frequency color Doppler (p ＝ 0.001). Group Ⅱ also had a higher score than group Ⅰ for overall flap growth evaluation (nonparametric rank sum test, p ＝ 0.04). Within the scale of the study, it seems that perforator localization and navigation using a 3D-printed navigator is technically feasible, and helps to improve the clinical outcome of free fibular flaps. The perforator navigator will play a useful role in displaying the perforator course, improving the accuracy of perforator localization, reducing surgical injury, and ultimately enhancing flap success rate.

The Pedicled Sensate Osteocutaneous Groin Flap for Reconstruction of the Forearm and Hand

BACKGROUND

The groin flap is axial pedicled and versatile. Until now, this flap has been used with many modifications for the reconstruction of forearm and hand defects. However, this flap has not been used in forearm, hand, and thumb reconstruction as a pedicled sensate osteocutaneous flap. In this study, a pedicled sensate osteocutaneous groin flap was used for the reconstruction of composite tissue defects on the forearm, hand, and thumb.

PATIENTS AND METHODS

A pedicled sensate osteocutaneous groin flap was used to reconstruction composite tissue defects on the forearm, hand, and thumb in 7 patients. The mean age of the patients was 42 years. The defects were located on the dorsal surface of the forearm and hand in 2 patients, the dorsal surface of the hand and finger in 2 patients, and the thumb in 3 patients. The dimensions of the flap skin paddle ranged from 7 × 11 cm to 8 × 23 cm, and the dimensions of the bone component ranged from 1 × 1.5 × 3.5 cm to 1 × 1.5 × 5 cm. The mean follow-up duration was 26 months.

RESULTS

All the flaps survived. Flap debulking was performed using 3 flaps. Sensory recovery in the flaps was completed approximately 18 months after the first operation. When the results of static 2-point discrimination test and Semmes-Weinstein monofilament test were evaluated at 18 months postoperatively, it showed that protective sensation was obtained. Except for 1 patient, motion restriction did not develop in the wrist, elbow, or shoulder joints. An acceptable aesthetic result, minimal donor site deformity, and protective sensation were obtained in all patients.

CONCLUSIONS

The pedicled sensate osteocutaneous groin flap can be safely used in the reconstruction of forearm and hand composite tissue defects that do not have available vascular structures for free flaps in the recipient area and in thumb reconstruction where toe transfer and pollicization cannot be performed.

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

SUMMARY

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 osteocutaneous SCIP flap: A detailed description of the surgical technique and retrospective cohort study of consecutive cases in a tertiary European centre

INTRODUCTION

In the era of increasing popularity of the superficial circumflex iliac perforator (SCIP) flap, osteocutaneous variants of the flap have been described as well. Despite their benefits such as customizability and low donor site morbidity, these flaps have not yet gained broad acceptance. By reviewing our case series, we aim to promote the safe application of this promising new tool in osteoplastic reconstructions.

PATIENTS AND METHODS

We performed a single-centre, retrospective chart review of all cases in which osteocutaneous SCIP-flaps were used. We describe our surgical technique and present the surgical, functional and aesthetic outcomes of the patients in our cohort.

RESULTS

Since September 2019, we have used osteocutaneous SCIP flaps in six patients, five in the extremities and one for the head and neck region. The vascularised bone segment was measured on average 4.9 cm (range 4-7 cm) x 3 cm (range 1.5-4 cm) and was combined with a skin paddle of a mean length of 14.3 cm (range 8-20 cm) and width of 6.3 cm (range 5-8 cm). One flap underwent emergency revision due to venous congestion. All flaps survived and healed uneventfully. Long-term follow-up shows adequate bony integration and stable soft tissue coverage with good functional restoration and minimal donor site morbidity.

CONCLUSION

The osteocutaneous SCIP flap provides a large and thin skin island and a "moderately sized" vascularised bone segment with minimal donor site morbidity and can be successfully used in selected cases of osteoplastic reconstruction.

Maximizing the Versatility of Thin Flap from the Groin Area as a Workhorse Flap: The Selective Use of Superficial Circumflex Iliac Artery Perforator (SCIP) Free Flap and Superficial Inferior Epigastric Artery (SIEA) Free Flap with Precise Preoperative Planning

BACKGROUND

 This study aimed to evaluate the usefulness of the selective use of the superficial circumflex iliac artery perforator (SCIP) and the superficial inferior epigastric artery (SIEA) flap as a workhorse flap from the groin area with precise preoperative surgical planning.

METHODS

 A total of 79 free flap reconstructions were performed in the study period; 35 SCIP free flaps and 19 SIEA free flaps were performed in the study period. Detailed preoperative surgical planning was performed using computed tomography (CT) angiography and color Doppler ultrasound. Detailed anatomical information of the flaps and reconstructive outcomes were evaluated.

RESULTS

 Flap characteristics between SCIP free flaps and SIEA free flaps were similar. The average transverse distance of the perforator from anterior superior iliac spine was 15.91 cm in SCIP free flaps and 43.15 cm in SIEA free flaps. The overall flap success rate was 96.4%. Majority of the patients achieved satisfactory contour without debulking surgery. Donor site morbidity was minimal with one case of wound dehiscence.

CONCLUSION

 The selective use of the SCIP and SIEA free flap in groin area is a safe and useful technique. The surgical outcomes were reliable and similar between the SCIP and SIEA free flaps. Preoperative vascular planning using CT angiography and color Doppler ultrasound is essential for selecting the proper flap.

Pedicled Superficial Circumflex Iliac Artery Perforator (SCIP) flap for perineo-scrotal reconstruction following Fournier's gangrene

BACKGROUND

Fournier's gangrene is a form of necrotising fasciitis involving perineo-scrotal skin. It is treated with radical debridement, infection control and often leaves a large anatomical defect that is challenging to reconstruct. The anatomical location of the defect leads to faecal contamination, difficulties when mobilizing, and negative psychological impact. Traditional approaches for managing such defects have relied on either healing by secondary intention or skin grafting. There are few reported cases in the literature to cover such defects with a flap.

METHODS

Pedicled Superficial Circumflex Iliac Artery Perforator (SCIP) flap reconstruction was performed in three patients who had perineo-scrotal defects following debridement for Fournier's gangrene.

RESULTS

All flaps survived with no significant postoperative complications and good functional and aesthetic outcomes were achieved. The mean age of patient was 52 years and the largest defect measured 22 × 10 cm.

CONCLUSION

The reconstruction of perineo-scrotal defects is difficult despite a range of reconstructive options. The pedicled SCIP flap offers many advantages over standard techniques. This flap is thin, pliable, and has a consistent anatomy. With continued experience, we feel that this flap could be considered the gold standard of treatment for such defects.

Deep Fat Saving Elevation of the Superficial Circumflex Iliac Artery Perforator Flap

Background and Objectives: Prolonged drain stay and lymphorrhea are often problems at the donor site of the superficial circumflex iliac artery perforator (SCIP) flap. This study aimed to introduce a novel technique of the SCIP flap elevation: Deep Fat Saving (DFS) technique. Materials and Methods: Thirty-two patients who underwent the SCIP flap transfer were divided based on the flap-elevated layer: above the deep fascia or the Camper fascia saving the deep fat. The duration of drain stay and the rates of flap survival and donor-site complications were compared between the groups. The inverse probability weighting (IPW) method was conducted to balance confounders. Results: By IPW, two balanced pseudo-populations were created: DFS = 33.9 and Conventional = 31.3. There were no significant differences in the rate of flap survival (DFS: 100% verses Conventional: 95.8%, p = 0.32) and donor site complications (DFS: 2.4% versus Conventional: 1.3%, p = 0.68, respectively). The duration of drain stay was shorter in the DFS group (weighted median: 6 versus 8 days; weighted difference: -1.6 days (95% confidence interval: -2.8 to -0.4), p = 0.01). Conclusions: An SCIP flap can be reliably harvested using the Deep Fat Saving technique.

Domino Free Flap Transfer Using a Superficial Circumflex Iliac Artery Perforator Flap for the Toe Flap Donor Site

BACKGROUND

Toe-to-hand transfer is a favorable option for finger reconstruction, but donor site healing can be challenging. The superficial circumflex iliac artery perforator (SCIP) flap has yet to be used widely for toe reconstruction. The purpose of this report was to validate the efficacy of the sequential simultaneous free SCIP flap transfer for the toe flap donor site in a consecutive case series.

METHODS

The medical records of 18 consecutive patients who underwent a simultaneous SCIP flap transfer and a toe-to-hand transplant were reviewed. Free SCIP flap reconstruction was performed in a simultaneous 2-team approach. The SCIP flaps were transferred to various toe flap donor sites: a great toe wraparound flap in 9 cases, a second toe distal phalangeal flap in 4 cases, a great toe osteo-onycho-cutaneous flap in 3 cases, a twisted wraparound flap in 1 case, and a great toe hemipulp flap in 1 case.

RESULTS

The size of the SCIP flap ranged from 5 × 3 to 16 × 8 cm. A mean of the total operative time was 229.2 minutes (range, 118-441 minutes; SD, 75.8 minutes). All the SCIP and toe flaps survived completely. Minor wound dehiscence was seen in 2 cases, and the wound healed by conservative treatment. The mean follow-up period was 23.7 months (range, 7-44 months; SD, 9.7 months). No patient had gait dysfunction postoperatively.

CONCLUSIONS

A sequential SCIP flap transfer was performed simultaneously without additional time, allowing secure soft tissue coverage of the toe flap donor even with avascular tissue such as bone or tendon exposed. The sequential SCIP flap transfer can be a useful option for reconstruction of toe flap donor site, when multiple microsurgeons and microscopes are available.

Near-Infrared Fluorescence with Indocyanine Green to Assess Bone Perfusion: A Systematic Review

Background: Adequate perfusion of a bone flap is essential for successful reconstruction of osseous defects. Unfortunately, complications related to inadequate bone perfusion are common. Near-infrared fluorescence (NIRF) imaging enables intraoperative visualization of perfusion. NIRF has been investigated in reconstructive surgery to aid the surgeon in clinical perioperative assessment of soft tissue perfusion. However, little is known on the beneficial use of NIRF to assess bone perfusion. Therefore, the aim of this review was to search for studies evaluating NIRF to assess bone perfusion. Methods: A systematic review, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline, was performed. Studies up to October 2021 were included. We extracted data regarding the study population, size and design, reported objective fluorescence parameters and the methodology used for fluorescence imaging and processing. Results: Ten articles were included. Studies reported unevenly on the protocol used for NIRF imaging. Five studies reported objective parameters. Absolute and relative perfusion parameters and parameters derived from maximum fluorescence were reported. The clinical significance of these parameters has not been evaluated in humans. Conclusion: The evidence on bone perfusion as measured with NIRF is limited. More clinical studies are required.

Superficial Circumflex Iliac Artery Perforator Flap in Advanced Head and Neck Reconstruction: From Simple to Its Chimeric Patterns and Clinical Experience with 22 Cases

BACKGROUND

Head and neck tissue defects after ablative head and neck surgery often require complex and composite reconstructions. The superficial circumflex iliac artery perforator (SCIP) flap is an extremely versatile perforator-based flap with minimal donor-site morbidity. The authors present their experience with both simple and chimeric SCIP flap reconstructions for complex defects in various head and neck regions.

METHODS

Twenty-two patients undergoing ablative head and neck surgery for oncologic abnormalities were treated by means of a SCIP flap reconstruction. Patients' mean age was 62 years; 21 were men and one was a woman. Seventeen flaps were simple and five were chimeric reconstruction patterns. Indocyanine green perfusion imaging was performed in all cases.

RESULTS

Twenty-one of 22 patients (95.5 percent) were successfully treated with good aesthetic and functional results. Two patients (9 percent) showed minor donor-site complications that were managed conservatively. The mean follow-up period was 5.3 months (range, 2 to 8 months).

CONCLUSIONS

This case series demonstrates the reliability and versatility of the SCIP flap for head and neck reconstruction. The chimeric options combined with bone, double-skin paddle, and muscle offer a broad variety of functional reconstructive solutions for complex head and neck surgery. Intraoperative indocyanine green perfusion examinations area valuable tool to assess and ascertain proper inset, vitality, and postanastomosis vessel patency in these complex microvascular flap reconstructions.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

The usefulness of a free thinned deep inferior epigastric artery perforator flap and measurement of the vascular pedicle length: A thin flap with a long pedicle

BACKGROUND

The thinned deep inferior epigastric perforator (DIEP) flap branching from the main trunk to the superolateral direction may be useful because of its long vascular pedicle. DIEP flap is used as an axial-pattern adipose flap. The vascular pedicle length of the thinned DIEP flap was investigated using originally developed software. The clinical application of the thinned DIEP flap was verified in a case series.

METHODS

In 40 patients with enhanced computed tomography (CT) data, the vascular pedicle length of the longest thinned DIEP flap was simulated using the software. A free thinned DIEP flap was used in 10 clinical cases of facial or breast reconstruction.

RESULTS

In all simulated cases, the vascular pedicle of the DIEP branching to the superolateral direction was the longest, and the vascular pedicle could be lengthened up to 34.8% by dissecting the vessels on the fascia as a vascular pedicle. In all the clinical cases, the reconstruction of a complex form defect or reconstruction requiring a long vascular pedicle could be achieved in one stage without any perioperative complications. The intraclass correlation coefficient between simulated pedicle length and dissected pedicle length was 0.99.

CONCLUSION

Thinned DIEP flaps with long vascular pedicles could be elevated safely. Multiple adipose or muscle flaps could be combined without complications. The length of the winding vascular pedicle could be measured using imaging data using the software first developed in the present study. This software would be useful in the planning of a thinned DIEP flap and other free flaps.

Superficial Circumflex Iliac Artery Perforator Flap Elevation Using Preoperative High-Resolution Ultrasonography for Vessel Mapping and Flap Design

BACKGROUND

 The superficial circumflex iliac artery (SCIA) perforator (SCIP) flap has gained acceptance among reconstructive microsurgeons, the minimal donor site morbidity being its greatest advantage. The purpose of this article is to introduce the use of preoperative ultrasonography to facilitate elevation and to avoid postoperative complications of the SCIP flap.

METHODS

 Preoperative mapping of the SCIA and the superficial circumflex iliac vein (SCIV) using a high-resolution ultrasound system were performed in patients undergoing reconstruction using a free SCIP flap. The skin paddle was designed placing the SCIA and the SCIV in the middle of the flap.

RESULTS

 Preoperatively marked SCIA and SCIV were found intraoperatively in all cases. The skin paddle design for sufficient arterial inflow and venous drainage resulted in no postoperative flap complications.

CONCLUSION

 The use of a preoperative high-resolution ultrasound system significantly facilitates elevation of the SCIP flap, notably via the following 2 points: 1) pedicle can always be found under the markings made with preoperative ultrasonography, 2) satisfactory perfusion of the flap can be guaranteed via a safe flap design that includes preoperatively marked vessels within the skin paddle.

Novel Classification of the Branching Patterns of the Superficial Branch and the Deep Branch of the Superficial Circumflex Iliac Artery and the Superficial Inferior Epigastric Artery on Computed Tomographic Angiography

BACKGROUND

 Recent advances in the superficial circumflex iliac artery (SCIA) perforator flap transfer emphasized the necessity to comprehensively understand the lower abdominal vasculature. This study aimed to clarify the relationship among the superficial inferior epigastric artery (SIEA), the superficial branch (SCIAs), and the deep branch (SCIAd) of the SCIA.

METHODS

 Computed tomographic angiography was retrospectively reviewed in 312 hemiabdomens in 161 female patients who underwent abdominal flap breast reconstruction. We assessed the presence, caliber, and branching patterns of the SCIA branches and the SIEA.

RESULTS

 The SIEA-SCIA common trunk was present in 40.1% of the hemiabdomen and was identified in either side of the abdomen in 63.6% of patients. At least one superficial vessel larger than 1.5 mm was found in 61.5% of hemiabdomens. Seven branching patterns of the SCIA-SIEA system were noted: (1) the SCIA and the SIEA originated together (17.0%); (2) the SIEA and the SCIAs shared an origin (22.8%), (3) the SCIA and the SIEA branched separately (17.0%), (4) each artery originated separately (8.0%); (5) the SCIAs and the SCIAd emerged together with the SIEA absent (17.3%); (6) the SCIAs and the SCIAd originated separately with the SIEA absent (13.1%); (7) the SIEA and SCIAd originated separately with the SCIAs absent (3.5%).

CONCLUSION

 SCIA-SIEA branching patterns were classified into seven distinctive patterns. This novel classification may help surgeons to choose the optimal pedicle when using the hemi-abdomen region as the donor site.

Use of Preoperative High-Resolution Ultrasound System to Facilitate Elevation of the Superficial Circumflex Iliac Artery Perforator Flap

BACKGROUND

 During elevation of the superficial circumflex iliac artery (SCIA) perforator (SCIP) flaps, the flap pedicle must often be converted from the superficial branch to the deep branch of the SCIA, complicating and prolonging the procedure. The goal of the present study was to demonstrate the effectiveness of high-resolution ultrasonography to decrease the conversion rate on which no previous report has focused, by making a comparison with a conventional method.

PATIENTS AND METHODS

 Forty-five consecutive cases where free SCIP flap transfer was performed for reconstruction were retrospectively reviewed. To preoperatively mark the course of the superficial branch, handheld Doppler ultrasonography was used in 27 cases (group 1) and a high-resolution ultrasound system in 18 cases (group 2).

RESULTS

 The conversion rate was significantly greater in group 1 than in group 2 (10/27 [37%] vs. 0/18 [0%], p = 0.003]. The frequency of use of multiple venous anastomoses was significantly higher in group 1 than in group 2 (21/27 [78%] vs. 2/18 [11%], p < 0.001). The operative time was significantly longer in group 1 than in group 2 (p = 0.038). There were no significant differences in postoperative complication rates (1/27 [4%] versus 0/18 [0%], p = 1.0).

CONCLUSION

 The use of a preoperative high-resolution ultrasound system significantly decreased the rate from of intraoperative conversion from the superficial branch to the deep branch of the SCIA. It also resulted in significantly fewer venous anastomoses and a shorter operative time, while maintaining a low incidence of postoperative complications.

Use of a combined SIEA and SCIP based double pedicled abdominal flap for breast reconstruction

BACKGROUND

Recently, the deep inferior epigastric perforator (DIEP) flap has become the gold standard for breast reconstruction, but it has some drawbacks such as abdominal bulging and hernia. To overcome these disadvantages, the superficial inferior epigastric artery perforator (SIEA) flap is used as an alternative option, but it has another problem, namely limited vascular territory and risk of vascular thrombosis. To solve these problems, we introduced our new technique, a combined SIEA and superficial circumflex iliac artery perforator (SCIP) based double pedicled abdominal flap. In this report, we present our experience of using this technique.

METHODS

The SIEA and SCIP based double pedicled abdominal flap was used in five patients who wanted to have unilateral breast reconstruction after a mastectomy due to breast cancer. The average age was 48.2 (range 38-56) years, and the average BMI was 24.4 (range 19.2-31.4). The SIEA and SCIP based double pedicled abdominal flap was designed as a modified DIEP flap, and all flaps were placed in the vertical setting. The flap pedicles had two different vascular supplies, SIEA and SCIA, and the drainage systems, SIEV and SCIV, anastomosed to the internal mammary artery and vein in all cases.

RESULTS

The harvested SIEA and SCIP based double pedicled abdominal flaps were a median volume of 925 g (range 452-1570 g) and average size of 491 cm² (range 440-611 cm² ). The average reconstructive time was 7:41 (range 6:31-9:17). In four out of the five cases, the SIEA and SCIA joined together to make a common pedicle artery trunk, and its average size was 1.08 mm. Four out of the five cases had a wide vascular territory crossing the abdominal midline as shown by ICG angiography. One case showed ICG fluorescence for the hemi-side of the abdominal flap. Postoperative course was uneventful, and there were no major perioperative complications, which need extra surgical procedures. Follow-up period averaged 273 days (range 194-312 days).

CONCLUSION

The SIEA and SCIP based double pedicled abdominal flap showed viable flap territory across the midline in all cases. The SIEA and SCIP based double pedicled abdominal flap might be another ideal option for breast reconstruction, when appropriate SIEA and SCIA pedicles are identified, and an adequate ICG fluorescence is obtained for the size of flap needed.

The Superficial Circumflex Iliac Artery Perforator Flap in Lower Extremity Reconstruction

The superficial circumflex iliac artery perforator flap is evolved from the groin flap, which was one of the early free flaps with a good concealed donor site. By further understanding the anatomy of perforators and elevating the flap based on it, this will provide added advantage of being a thin flap, harvesting as a composite flap, and help estimate the limit of skin paddle dimension. Despite these advantages, the relatively short pedicle still remains a challenge where long pedicle flaps are needed. One should select the flaps based on the recipient defect condition along with surgeons' experience, knowledge, and preference.

Best New Flaps and Tips for Success in Microsurgery

LEARNING OBJECTIVES

After reviewing this article, the participant should be able to: 1. Understand the trends in reconstruction using flaps. 2. Understand the surgical anatomy and elevation of the three best flaps: superficial circumflex iliac artery perforator, profunda artery perforator, and thin anterolateral thigh perforator. 3. Understand the core principle and the modern evolution of microsurgery. 4. Be acquainted with new microsurgical tips to maximize outcomes.

SUMMARY

Plastic surgery has a long history of innovation expanding the conditions we can treat, and microsurgical reconstruction has played a pivotal role. Freestyle free flaps now create another paradigm shift in reconstructive surgery, relying on a better understanding of anatomy and physiology, opening the door to patient-specific customized reconstruction. This article aims to provide information regarding useful and practical new advances in the field of microsurgery.

Use of the superficial circumflex iliac artery perforator flap for reconstruction after sarcoma resection

BACKGROUND

Postoperative complications after flap-coverage in sarcoma treatment can postpone postoperative adjunct treatments. Here, we present our experience with the use of the superficial circumflex iliac artery perforator (SCIP) flap after sarcoma resection.

PATIENTS AND METHODS

Patients undergoing immediate reconstruction surgery with a flap after sarcoma resection at a single institution from February 2017 to April 2020 were identified. Patient demographics, tumor characteristics, surgical characteristics, and complications were examined.

RESULTS

Thirty-five consecutive patients underwent reconstructions using a SCIP flap (34 free and one pedicled SCIP flaps). We also identified 47 consecutive patients who underwent reconstruction with other pedicled or free flaps over the same time period. No significant differences were found in patient age, gender, defect size, or operative time between these two groups. The incidences of overall complications (20/47 [42.6%] vs. 3/35 [8.5%], p < .001), flap dehiscence (7/47 [14.8%] vs. 0/35 [0%], p = .018), and total flap complications (15/47 [31.9%] vs. 2/35 [5.7%], p = .005) were statistically greater in the control group than in the SCIP group.

CONCLUSION

With its minimal postoperative complication rate both in the reconstruction site and the donor site, the SCIP flap can be considered an optimal reconstruction option after sarcoma resection.

The vascular exploration of the proximal femoral artery perforator region, an ideal donor site to choose cutaneous flaps of thin, supple, and glabrous skin: A cadaveric study

BACKGROUND

The thigh region is a well-known area for harvesting cutaneous flaps for microsurgery replacement, given the characteristics of the skin: thin, flexible, and glabrous. We investigated the vascular pattern of 32 cadaveric anteroproximal thighs for the possibility of an extended harvesting area, which we call the proximal femoral artery perforator region.

MATERIALS AND METHODS

We injected colored, radio opaque latex in the external iliac artery and investigated the perforator branches from the superficial circumflex iliac, femoral common, superficial, and deep femoral (profunda femoris) arteries to the skin of the proximal femoral artery perforator region. This region was divided into 3 equal subregions (superior, medial, and lateral), and their perforators were counted and measured.

RESULTS

There was no significant difference in the number of arterial pedicles across the three subregions: 30 superior, 35 inferolateral, and 27 inferomedial. The perforators had a cutaneous path in 81% of the cases, while 6% were musculocutaneous and 5% septocutaneous, without a significant difference in their proportion in the three subregions. The mean length and diameter of the pedicles were 5.39 ± 2.1 cm and 1.07 ± 0.4 mm, respectively, without significant differences in the three subregions.

CONCLUSIONS

The proximal femoral artery perforator region is a suitable area to generate flaps of various sizes and shapes, as needed by the surgeon. All perforators were constant and possessed a sufficient diameter and length for a successful anastomosis during the surgical procedure. The donor site retains all technical advantages to successfully replace areas of glabrous skin.

Characteristics of the Superficial Circumflex Iliac Artery Perforator Flap in a Western Population and a Practice Approach for Free Flap Reconstruction

BACKGROUND

 There has been increasing interest in the superficial circumflex iliac artery perforator (SCIP) flap as a source of thin, pliable soft tissue combined with a favorable donor site. Despite several clinical series from Asia, barriers to adoption include reluctance to perform submillimeter "supermicrosurgery" and the effect of body habitus on flap feasibility. The purpose of this study is to distinguish vascular anatomic characteristics of the SCIP flap in a North American population.

METHODS

 Computed tomography angiography was examined in 84 flaps in healthy prospective renal donor patients from a radiographic database. Descriptive statistics as well as linear regression comparing variables to body mass index (BMI) were performed.

RESULTS

 Mean BMI was 27.1 ± 3.5 kg/m², while the mean patient age was 47.8 ± 11.4 years. The superficial circumflex iliac artery (SCIA) originated from the common femoral artery in 92% cases, with remainder originating from the profunda femoris. The mean vessel diameter was 1.85 mm at source vessel origin. Distance from skin to source vessel averaged 30.7 mm. Suprascarpal subcutaneous thickness averaged 16.5 mm. The mean distance from Scarpa's fascia to vessel origin was 14.1 mm. Direct three-dimensional distance from vessel origin to pubic tubercle was 50.2 mm. A medial and lateral perforator split off of the SCIA was observed in 38 cases (45%). Significant differences were shown when comparing BMI to skin to source vessel distance (p < 0.001), suprascarpal subcutaneous fat thickness (p < 0.001), and fascial distance to vessel origin (p < 0.001). BMI did not significantly affect vessel diameter.

CONCLUSION

 Despite a significantly higher BMI than many previously published cohorts, the SCIP remains an excellent source of thin and pliable tissue. When dissected closer to the source vessel, a vessel caliber of nearly 2 mm can be achieved, which may obviate the need for "supermicrosurgery" in this population.

The anatomical reliability of the superficial circumflex iliac artery perforator (SCIP) flap

INTRODUCTION

In order to achieve a satisfactory functional and aesthetic result a thin skin flap is often required in surgical reconstruction of various body regions. Perforator flaps based on either the superficial or deep branch of the superficial circumflex iliac artery (SCIA) have been used for this purpose mainly in the Asian population. Recently the superficial plane has been established as a new way of elevating the flap. Anatomical studies and details of this new flap are lacking.

MATERIAL AND METHODS

Wide areas were harvested subfascially from the groin of Thiel-fixated cadavers. Both deep and superficial branches of the superficial circumflex iliac artery were carefully dissected and individually injected with μAngiofil. After CT-imaging the flaps were raised on the superficial plane, perforators were marked and the flaps subsequently rescanned. High-resolution images of regions of interest were taken using micro-CT.

RESULTS

A total of 21 flaps were harvested and analyzed. Both the deep and superficial branch provided more than three perforators per branch, however, the deep branch based flap was significantly larger (202 vs. 112 cm², p < 0.01) and had a longer pedicle (9.1 vs. 6.6 cm, p < 0.01). Raising the flap in the superficial plane reliably reduces bulk and increases homogeneity.

CONCLUSIONS

The SCIP flap appears to have a reliable vascular blood supply. The SCIA and its main branches and perforators have a consistent vascular pattern. The deep branch of the SCIA has the anatomic potential to be the preferred pedicle in case larger flaps with longer pedicles are necessary.

Superficial Circumflex Iliac Perforator-Osteocutaneous Flap for Reconstruction of Extensive Composite Defects in the Forefoot

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Although the great toe plays important roles in walking, loading, and maintaining balance when compared with other toes, there are few reports on great toe reconstruction, including the reconstruction of distal phalanx. This report aims to describe the use of a superficial circumflex iliac artery perforator (SCIP)–osteocutaneous flap for reconstructing a complex tissue defect of the great toe. A 62-year-old man presented with a crush injury to the forefoot. Because the great toe was severely crushed, the defect distal to the proximal phalanx of the great toe was reconstructed using a SCIP-osteocutaneous flap. The immediate postoperative course was uneventful; however, surgical revision was necessary. Signs of osseous union could be observed on radiographic images taken 2 months after the initial surgery. Twenty-four months after surgery, the patient could freely walk without resorption of the transferred bone. We demonstrated that SCIP-osteocutaneous flaps may be promising free flaps in complex tissue defect reconstruction of the great toe.

Treatment of traumatic losses of substance in the foot

Treatment of traumatic loss of bone and tissue substance in the foot necessitates special consideration of the anatomy and physiology of the segment. The causes of foot trauma are multiple and in many cases violent, leading to progressive tissue deterioration that may require multi-phased debridement. The therapeutic objective is to reconstruct a functional foot permitting painless pushing off, walking and footwear use by restoring a stable bone framework, with resistant covering satisfactorily adjusted to the different zones of the foot. While coverage of the back of the foot must be fine, coverage of the plantar zones will be padded. The reconstructive surgeon shall be particularly attentive to plantar sensitivity. To take up the surgical challenge, it is of paramount importance to fully master a wide-ranging therapeutic arsenal ranging from conventional grafts to composite free flaps in view of proposing the solution most suited to the type, size and location of the loss of substance, all the while striving to generate as few sequelae as possible at the donor site. In order for reconstruction to be successful, multidisciplinary collaboration between plastic surgeons, orthopedists and physician is highly recommended.

Use of the transverse branch of the superficial circumflex iliac artery as a landmark facilitating identification and dissection of the deep branch of the superficial circumflex iliac artery for free flap pedicle: Anatomical study and clinical applications

BACKGROUND

The deep branch of the superficial circumflex iliac artery (SCIA) should be included when a large superficial circumflex iliac artery perforator (SCIP) flap is necessary, or when anatomical structures perfused by the deep branch are procured. The aim of this study was first to describe the anatomical features of the "transverse branch" of the deep branch of the SCIA in cadavers, and then to assess the efficacy of its use as a landmark for identification and dissection of the deep branch of the SCIA through clinical applications.

METHODS

Twenty groin regions from 10 cadavers were dissected. The course and the takeoff point of the transverse branch were documented. With the transverse branch used as a landmark for pedicle dissection, 27 patients (16 males and 11 females) with an average age of 51.7 years underwent reconstructions that used vascularized structures nourished by the deep branch of the SCIA. Aside from the skin paddle, an iliac bone flap was used in 10 cases, a lateral femoral cutaneous nerve flap in four cases, and a sartorius muscle flap in three cases. The defect locations included the head (seven cases), the foot (six cases), the hand (six cases), the arm (five cases), and the leg (three cases). The causes of reconstruction were tumors in 13 patients, trauma in six patients, infection in four patients, surgical procedures in three patients, and refractory ulcer in one patient.

RESULTS

In all specimens, the transverse branch was found underneath the deep fascia caudal to the anterior superior iliac spine (ASIS). The average distance from the ASIS to the transverse branch was 25.5 ± 13.0 mm (range, 5-50 mm). The average dimension of the flap was 13.1 × 5.9 cm² . All the flaps survived completely after the surgery; lymphorrhea was seen in one patient at the donor site. The average follow-up period was 12.9 months (range, from 2 to 42 months), and all patients had good functional recovery with satisfactory esthetic results.

CONCLUSIONS

The transverse branch was found in all specimens, branching from the deep branch of the SCIA. Successful results were achieved by using it as the landmark for identification and dissection of the deep branch of the SCIA. This method allows safe elevation of a large SCIP flap or a chimeric SCIP flap.