An outcome analysis comparing the thoracodorsal and internal mammary vessels as recipient sites for microvascular breast reconstruction: a prospective study of 100 patients

Time to be BRAVE: is educating surgeons the key to unlocking the potential of randomised clinical trials in surgery? A qualitative study

BACKGROUND

Well-designed randomised clinical trials (RCTs) provide the best evidence to inform decision-making and should be the default option for evaluating surgical procedures. Such trials can be challenging, and surgeons' preferences may influence whether trials are initiated and successfully conducted and their results accepted. Preferences are particularly problematic when surgeons' views play a key role in procedure selection and patient eligibility. The bases of such preferences have rarely been explored. Our aim in this qualitative study was to investigate surgeons' preferences regarding the feasibility of surgical RCTs and their understanding of study design issues using breast reconstruction surgery as a case study.

METHODS

Semistructured qualitative interviews were undertaken with a purposive sample of 35 professionals practicing at 15 centres across the United Kingdom. Interviews were transcribed verbatim and analysed thematically using constant comparative techniques. Sampling, data collection and analysis were conducted concurrently and iteratively until data saturation was achieved.

RESULTS

Surgeons often struggle with the concept of equipoise. We found that if surgeons did not feel 'in equipoise', they did not accept randomisation as a method of treatment allocation. The underlying reasons for limited equipoise were limited appreciation of the methodological weaknesses of data derived from nonrandomised studies and little understanding of pragmatic trial design. Their belief in the value of RCTs for generating high-quality data to change or inform practice was not widely held.

CONCLUSION

There is a need to help surgeons understand evidence, equipoise and bias. Current National Institute of Health Research/Medical Research Council investment into education and infrastructure for RCTs, combined with strong leadership, may begin to address these issues or more specific interventions may be required.

Spinal reconstruction with free vascularised bone grafts; approaches and selection of acceptor vessels

The use of free vascularised bone grafts is an infrequently performed surgical technique for the reconstruction of spinal defects. This field of surgery brings many challenges concerning the choice of free vascularised bone graft, planning of the operative procedure and selection of recipient vessels. This study aims to report our experience with free vascularised bone grafts, with special emphasis on the surgical approach and the selection of recipient vessels. Over a period of 17 years (1994-2011), we used these grafts for anterior spinal reconstruction in 30 patients. In 28 patients, a free vascularised fibular graft was used, and in two cases a free vascularised iliac crest graft was used. The spinal segments reconstructed involved the cervical or cervicothoracic spine (6 cases), the thoracic spine (11 cases) and the thoracolumbar and lumbosacral spine (13 cases). Revascularisation of the free vascularised bone graft proved to be technically feasible in 30 patients, but failed in one fibular graft due to difficulties with recipient vessels in the lumbar region. Technical challenges were met with respect to the choice of the recipient vessel at various anatomical sites. Availability of acceptor vessels was highly de-pendant of the type of surgery (resection or stabilisation) and the selected surgical approach. Based on these findings, a preferred approach is given for each region. The use of free vascularised bone grafts is a valuable technique for the reconstruction of complex spinal disorders. Successful execution requires microvascular expertise with respect to graft harvesting and appropriate choice of recipient vessels. Adequate preoperative planning in a multidisciplinary setting and adherence to the basic principles for spinal reconstruction are required.

Management of the ptotic or hypertrophic breast in immediate autologous breast reconstruction: a comparison between the wise and vertical reduction patterns for mastectomy

BACKGROUND

The Wise pattern can be used in mastectomies to address the excess skin in the ptotic or hypertrophic breast; however, limitations include mastectomy flap necrosis (MFN) and poor shape. The vertical pattern can potentially reduce the amount of MFN with improved aesthetic results. This study compares the Wise and vertical mastectomy patterns in immediate, autologous breast reconstruction.

METHODS

Thirty-three patients with grade 2 or 3 ptosis who elected to undergo immediate, autologous breast reconstruction were prospectively recruited into 2 nonrandomized cohorts. Of total, 17 patients (26 reconstructions) had Wise pattern and 16 (28 reconstructions) had vertical pattern. All patients were followed for MFN, time for wound healing, and postoperative complications. Patient and surgeon surveys rated the aesthetics of the reconstructions.

RESULTS

The 2 groups did not differ in age, body mass index, smoking, or breast measurements. The Wise group had significantly larger areas of MFN, higher number of postoperative visits, and longer wound-healing periods, compared with the vertical group (P < 0.05). There was no difference in time to adjuvant therapy or additional procedures. Patient surveys rated both incisions with equal satisfaction, except for symmetry that rated better in the Wise group. Surgeon surveys showed better scores for the vertical incision.

CONCLUSIONS

The Wise pattern is associated with significantly more MFN and prolonged wound care. Despite this complication, patients rate their breast reconstructions favorably, regardless of the type of incision. Both the Wise and vertical patterns can be safely used in skin-sparing mastectomies with immediate, autologous breast reconstruction with good aesthetic outcomes. The authors recommend the vertical pattern because of less MFN and surgeon-preferred aesthetics.

Can previous diagnostic examinations prevent preoperative angiographic assessment of the internal mammary perforators for (micro)surgical use?

BACKGROUND AND AIM

Preoperative assessment of the internal mammary artery perforating (IMAP) branches enhances IMAP-based reconstructive procedures. Conventionally, color-flow Doppler, selective catheter arteriography, or CT angiography is used for such assessment. We studied how often these examinations may be rendered superfluous by assessment of previously performed diagnostic examinations.

METHODS

A radiologist and a plastic surgeon jointly assessed whether information on the dominant IMAP could sufficiently be obtained from the thoracic CT scans of 12 head and neck cancer patients and 12 breast cancer patients, and from the mammary MRI of 12 breast cancer patients. Secondly, we retrospectively assessed in how many of the 10 patients who underwent an IMAP-flap head and neck reconstruction, and in how many of the 10 women who consecutively underwent a deep inferior epigastric perforator (DIEP) flap mammary reconstruction such previous diagnostic examinations were available and informative regarding the level of the dominant perforator.

RESULTS

All 24 CT scans and 11 of the 12 MRI scans sufficiently allowed assessment of the level of the dominant IMAP. Previous information had already been available in all 10 DIEP flap patients and 6 of the 10 IMAP-flap patients. The distribution of IMAP dominance over the intercostal levels on the scans differed from that found by cadaveric or intraoperative assessment.

CONCLUSIONS

Previously performed diagnostic CT scans and MRI scans that included the parasternal region usually allow sufficient preoperative assessment of the internal mammary perforators for reconstructive procedures. We advocate re-assessment of such previous examinations before ordering additional angiography. Additionally, we suggest to include the parasternal region in diagnostic scans.

Sensory reinnervation of free flaps in reconstruction of the breast and the upper and lower extremities

There is long-standing debate about sensate versus non-sensate free microvascular flaps among microsurgeons. The principle of connecting not only the vascular supply, but also sensitive nerves, in free tissue transfer is attractive. However, increased operating time and partial spontaneous innervation led to the common decision to restrict microsurgical tissue transfer to the vascular anastomosis and to leave the nerves “untreated”. Nevertheless, in special cases such as breast reconstruction or extremity reconstruction, the question about sensory nerve coaptation of the flaps remains open. We present our experience with free microvascular tissue transfer for breast and extremity reconstruction and compare the data with previous literature and conclude that most free flap surgeries do not benefit from nerve coaptation.

Can internal thoracic arteries be used for both coronary artery bypass and breast reconstruction?

OBJECTIVES

Recently, the internal thoracic arteries have been preferentially used in autologous breast reconstruction at the levels of the third or fourth intercostal spaces. This may compromise future treatment of occult coronary disease. We hypothesized that internal thoracic artery length at the fourth intercostal space would allow both breast reconstruction and future coronary artery bypass grafting (CABG).

METHODS

Anatomic analysis of 20 female patients undergoing CABG was performed examining internal thoracic artery length from its origin to the third, fourth, fifth intercostal spaces and the left anterior descending (LAD) artery target.

RESULTS

The left internal thoracic artery was anastamosed to the LAD target at a mean length of 11.4 ± 1.4 cm. The mean lengths of the pedicled left internal thoracic artery from its origin to the third, fourth and fifth intercostal space were 8.5 ± 1.0, 10.9 ± 1.2 and 13.0 ± 1.4 cm, respectively. Therefore, the left internal thoracic artery length was adequate at the fourth intercostal space in 6 of 20 (30%) patients.

CONCLUSIONS

Dissection of the left internal thoracic artery to the fourth intercostal space would allow for concomitant use in CABG and breast reconstruction in one-third of cases. However, skeletonization of the internal thoracic artery at the level of the fourth intercostal space would be sufficient for CABG in all cases following autologous breast reconstruction.

Recipient vessel selection in immediate breast reconstruction with free abdominal tissue transfer after nipple-sparing mastectomy

Background

Nipple-sparing mastectomy (NSM) is gaining popularity due to its superior aesthetic results. When reconstructing the breast with free abdominal tissue transfer, we must readdress the recipient vessel, because NSM can cause difficulty in access to the chest vessel.

Methods

Between June 2006 and March 2011, a total of 92 women underwent NSM with free abdominal tissue transfer. A lateral oblique incision was used for the nipple-sparing mastectomy. For recipient vessels, the internal mammary vessels were chosen if the mastectomy flap did not block access to the vessels. If it did, the thoracodorsal vessels were used. Age, degree of breast ptosis, weight of the mastectomy specimen, and related complications of the internal mammary vessel group and the thoracodorsal vessel group were compared.

Results

Thoracodorsal vessels were used as recipient vessels in 59 cases, and internal mammary vessels in 33 cases including 4 cases with perforators of the internal mammary vessels. Breast reconstruction was successful in all cases except one case involving a total flap failure, which was replaced by a silicone gel implant. The internal mammary group and the thoracodorsal group were similar in terms of age, height, breast weight, and degree of ptosis. The flap related complications such as flap loss and take-back operation rates were not significantly different between the two groups. The rate of nipple necrosis was higher in the internal mammary group.

Conclusions

The thoracodorsal vessels could produce comparable outcomes in breast reconstruction after nipple-sparing mastectomies. If access to internal mammary vessels is difficult, the thoracodorsal vessel can be a better choice.

Management of chest wall reconstruction after resection for cancer: a retrospective study of 22 consecutive patients

AIM

In this study, we report our experience on immediate reconstruction after resection of primary or metastatic chest wall tumors, to restore protective function and elasticity of chest or sternum.

METHODS

Between 2005 and 2009, 22 patients underwent reconstruction using a free or pedicled flap combined, or not, to alloplastic materials (Goretex®) in order to cover full-thickness defects of the chest wall after cancer surgery. Reconstruction was immediate in all cases.

RESULTS

Mean follow-up was 27 months. Of these, 18 patients were alive at the end of the study (81.5%). Eighteen patients had malignant tumors (82%); within these patients, 12 were alive without recurrence at the end of the study (67%). The average size of the chest wall defect was 255 cm². Goretex® Mesh was used in 8 patients. All patients benefited from reconstruction with a flap: pedicled or free latissimus dorsi flap (n = 15), pedicled great omentum (n=3), deep inferior epigastric perforator free flap (n = 3), and parascapular pedicled flap (n=1).

CONCLUSION

In this series, we were able to achieve long-term palliation and even cure in some patients by resecting full-thickness chest wall in local primary or recurrence of breast cancer without increasing morbidity. The same process was used successfully in association with adjuvant treatment in other tumors like skin sarcoma. We have followed a surgical algorithm according to the tumor localization and etiology.

The cardiac implications of breast reconstruction using the internal mammary artery as the recipient vessel

Background

Microsurgical breast reconstruction is a popular choice in breast reconstruction. Recipient vessel use for these autologous tissue reconstructions has shifted from the thoracodorsal to the internal mammary vessels. Coronary artery bypass (CAB) surgery remains the optimal revascularization strategy in patients with significant, diffuse coronary artery disease. The conduits of choice for coronary revascularization are the internal mammary arteries (IMA) because of their superior long-term graft patency rate and improved patient survival.

Objective

To review the cardiac risk factors in the breast reconstruction population, and to report the incidence of postoperative cardiac events at the London Health Sciences Centre, London, Ontario. The authors present the index cases illustrating cardiac complications following the use of internal mammary vessels.

Method

A retrospective, single-centre, cumulative audit of breast reconstruction practice from 2005 to 2009 was conducted. A total of 81 patients undergoing autologous breast reconstruction were reviewed. Two women were noted to have experienced postoperative myocardial infarction requiring intervention. Both were noted to have triple-vessel disease, an indication for CAB; however, during the breast reconstruction, their IMAs had been utilized. As a result, both women subsequently underwent triple-vesssel percutaneous intervention, with one woman later requiring CAB without IMA because of recurrent ischemia.

Conclusion

While there is limited overlap with the breast reconstruction and cardiac disease population, there can be significant cardiac health implications in the postoperative status (both short and long term) of women undergoing autologous breast reconstruction using the IMAs as recipient vessels.

Autologous microsurgical breast reconstruction and coronary artery bypass grafting: an anatomical study and clinical implications

OBJECTIVE

To identify possible avenues of sparing the internal mammary artery (IMA) for coronary artery bypass grafting (CABG) in women undergoing autologous breast reconstruction with deep inferior epigastric artery perforator (DIEP) flaps.

BACKGROUND

Optimal autologous reconstruction of the breast and coronary artery bypass grafting (CABG) are often mutually exclusive as they both require utilisation of the IMA as the preferred arterial conduit. Given the prevalence of both breast cancer and coronary artery disease, this is an important issue for women's health as women with DIEP flap reconstructions and women at increased risk of developing coronary artery disease are potentially restricted from receiving this reconstructive option should the other condition arise.

METHODS

The largest clinical and cadaveric anatomical study (n=315) to date was performed, investigating four solutions to this predicament by correlating the precise requirements of breast reconstruction and CABG against the anatomical features of the in situ IMAs. This information was supplemented by a thorough literature review.

RESULTS

Minimum lengths of the left and right IMA needed for grafting to the left-anterior descending artery are 160.08 and 177.80 mm, respectively. Based on anatomical findings, the suitable options for anastomosis to each intercostals space are offered. In addition, 87-91% of patients have IMA perforator vessels to which DIEP flaps can be anastomosed in the first- and second-intercostal spaces.

CONCLUSION

We outline five methods of preserving the IMA for future CABG: (1) lowering the level of DIEP flaps to the fourth- and fifth-intercostals spaces, (2) using the DIEP pedicle as an intermediary for CABG, (3) using IMA perforators to spare the IMA proper, (4) using and end-to-side anastomosis between the DIEP pedicle and IMA and (5) anastomosis of DIEP flaps using retrograde flow from the distal IMA. With careful patient selection, we hypothesize using the IMA for autologous breast reconstruction need not be an absolute contraindication for future CABG.

Achieving autologous breast reconstruction for breast cancer patients in the setting of post-mastectomy radiotherapy

INTRODUCTION

Breast cancer is now associated with long-term disease-free and overall survival, and in the setting of mastectomy, long term psycho-sexual health becomes an important consideration. To this end, breast reconstruction has been shown to significantly improve quality of life for mastectomy patients. With adjuvant radiotherapy often required in the setting of breast reconstruction, it is unclear what interaction the two can have.

METHODS

A thorough literature review was undertaken to assess the impact of radiotherapy on autologous breast reconstruction, and in particular, the influence of its timing on vessel selection, post-operative complications and both oncologic and cosmetic outcomes.

RESULTS

A clear benefit was established for delaying reconstruction until after radiotherapy to improve cosmetic outcomes. Although the timing of radiotherapy administration may influence vessel selection and the nature of post-operative complications encountered, overall outcomes were not dissimilar. Likewise, oncologic outcomes have not been shown to be significantly affected by the timing of radiotherapy.

CONCLUSIONS AND IMPLICATIONS FOR CANCER SURVIVORS

Both immediate and delayed breast reconstruction are safe modes of treatment, however patients that are expected to require adjuvant radiotherapy may benefit from delaying reconstruction until completion of oncologic treatment.

[The inferior gluteal musculocutaneous flap: Short and long-term results for 69 patients]

The inferior gluteal musculocutaneous flap described by Shaw then Le-Quang offers the possibility of harvesting a large amount of tissue with a well-concealed scar in the inferior fold. Since 1996, we used this flap for breast reconstruction without implant. The purpose of this study was to assess short and for long-term results in our patients. Between 1996 and 2005, 64 patients underwent 69 musculocutaneous flaps by two seniors surgeons, for secondary unilateral reconstruction (57 cases, 51 total mastectomy, three partial mastectomy, three constitutional breast asymmetry), five bilateral reconstruction or one thoracic skin ulceration after radiotherapy. The average flap weight and size was respectively 360g and 18 × 7cm. For short results, the assessment was based on flap success and surgical morbidity. For long-term results, the assessment was based on breast result (shape, volume, symmetry, skin and scar) and donor-site morbidity (scar, contour deformity, muscle function and sensation). Patients and surgeons global satisfaction were compared. Minimal follow-up was three years for 60 patients. Two patients died with metastasis. Sixty-three flaps succeeded. We had five flap necrosis, one after general complication (pulmonary embolism), four after venous thrombosis during the first period of our experience. Forty patients underwent a second procedure on the flap or on the other breast (25 cases). For the patients, the global result was excellent in 20 cases, good in 32 cases, fair in nine cases. For surgeons the global result was excellent in 13 cases, good in 32 cases, fair in 13 cases and poor in three cases. Concerning the donor-site, only one patient had an asymmetry of the buttock. Mostly, the scar of the donor site was good. Five cases needed a new surgery for poor scar. Five patients had functional complaints (for bicycle and squatting). Twenty-three patients noticed the hypoesthesia in the territory of the posterior femoral cutaneous nerve. For breast reconstruction, the gluteal region is an acceptable donor site with low morbidity and stable results. This technique needed a relative long learning curve, especially for the venous pedicle. We recommend to use a large vein dissected from the arm and axillary vessels. We also reduce the harvesting volume of the muscle to preserve the function. The reconstructive breast had a good shape, sufficient volume and acceptable symmetry.

[Preoperative angiographic CT-scan for perforator flap transfer. Clinical applications in an emergency unit of reconstructive surgery: four clinical cases]

Our experience of the deep inferior epigastric artery perforator flap has led us to perform systematically an abdominal CT-scan for the pretherapeutic checking. This exam gives us a precise vascular mapping of musculocutaneous and septocutaneous perforators artery of the flap, may enable a better orientation in the dissection and reduce the surgery time. We have enlarged the indication of this exam to the members flaps who needs the dissection of a musculocutaneous or a septocutaneous perforators vessels: Nakajima's et al. classification [1]. The mapping of perforating vessels on 3D reconstruction pictures helps us to planify the vascular cutaneous autologous grafts.

A review of the surgical management of breast cancer: plastic reconstructive techniques and timing implications

The oncologic management of breast cancer has evolved over the past several decades from radical mastectomy to modern-day preservation of chest and breast structures. The increased rate of mastectomies over recent years made breast reconstruction an integral part of the breast cancer management. Plastic surgery now offers patients a wide variety of reconstruction options from primary closure of the skin flaps to performance of microvascular and autologous tissue transplantation. Well-coordinated partnerships between surgical oncologists, plastic surgeons, and patients address concerns of tumor control, cosmesis, and patients' wishes. The gamut of breast reconstruction options is reviewed, particularly noting state-of-the-art techniques, as well as the advantages and disadvantages of various timing modalities.

Occult malignancy rate associated with thoracodorsal vessel dissection for free flap breast reconstruction

BACKGROUND

The rate of breast reconstruction following mastectomy is increasing, and currently sits at about 15%. Free flap reconstruction techniques using the thoracodorsal vessels as recipients provide an opportunity for a "second look" at the axillary nodal basin post-mastectomy. The purpose of this study was to determine the occult malignancy rate associated with free flap breast reconstruction.

METHODS

A retrospective chart review was performed to ascertain the occult malignancy rate of women who received a delayed free flap reconstruction at our institution between 1990 and 2001. Any additional therapy as a result of a positive result was also recorded.

RESULTS

Free flap breast reconstructions between 1990 and 2001 totalled 322, and of those 136 reconstructions were delayed and met our inclusion criteria. An occult malignancy rate of 3.6% (five patients) was identified for these patients. Four patients received additional therapy as a result of this finding.

CONCLUSION

This study serves to alert reconstructive surgeons to the potential for finding occult tumour during free flap breast reconstruction.

Outcomes of patients who participate in randomized controlled trials compared to similar patients receiving similar interventions who do not participate

BACKGROUND

Some people believe that patients who take part in randomised controlled trials (RCTs) face risks that they would not face if they opted for non-trial treatment. Others think that trial participation is beneficial and the best way to ensure access to the most up-to-date physicians and treatments. This is an updated version of the original Cochrane review published in Issue 1, 2005.

OBJECTIVES

To assess the effects of patient participation in RCTs ('trial effects') independent both of the effects of the clinical treatments being compared ('treatment effects') and any differences between patients who participated in RCTs and those who did not. We aimed to compare similar patients receiving similar treatment inside and outside of RCTs.

SEARCH STRATEGY

In March 2007, we searched The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, The Cochrane Methodology Register, SciSearch and PsycINFO for potentially relevant studies. Our search yielded 7586 new references. In addition, we reviewed the reference lists of relevant articles.

SELECTION CRITERIA

Randomized studies and cohort studies with data on clinical outcomes of RCT participants and similar patients who received similar treatment outside of RCTs.

DATA COLLECTION AND ANALYSIS

At least two review authors independently assessed studies for inclusion, assessed study quality and extracted data.

MAIN RESULTS

We identified 30 new non-randomized cohort studies (45 comparisons): no new RCTs were found. This update now includes five RCTs (yielding 6 comparisons) and 80 non-randomized cohort studies (130 comparisons), with 86,640 patients treated in RCTs and 57,205 patients treated outside RCTs. In the randomised studies, patients were invited to participate in an RCT or not; these comparisons provided limited information because of small sample sizes (a total of 412 patients) and the nature of the questions they addressed. When the results of RCTs and non-randomized cohorts that reported dichotomous outcomes were combined, there were 98 comparisons; there was also heterogeneity (P < 0.00001, I(2) = 42.2%) between studies. No statistical significant differences were found for 85 of the 98 comparisons. Eight comparisons reported statistically significant better outcomes for patients treated within RCTs, and five comparisons reported statistically significant worse outcomes for patients treated within RCTs. There was significant heterogeneity (P < 0.00001, I(2) = 58.2%) among the 38 continuous outcome comparisons. No statistically significant differences were found for 30 of the 38 comparisons. Three comparisons reported statistically significant better outcomes for patients treated within RCTs, and five comparisons reported statistically significant worse outcomes for patients treated within RCTs.

AUTHORS' CONCLUSIONS

This review indicates that participation in RCTs is associated with similar outcomes to receiving the same treatment outside RCTs. These results challenge the assertion that the results of RCTs are not applicable to usual practice.

MOC-PSSM CME article: Breast reconstruction

LEARNING OBJECTIVES

After studying this article, the participant should be able to: 1. Understand the various techniques available to reconstructive breast surgeons. 2. Perform a comprehensive assessment of the breast reconstruction candidate. 3. Gain knowledge about the indications and contraindications for different breast reconstructive procedures. 4. Understand the complications inherent to different reconstructive breast procedures.

SUMMARY

This article was prepared to accompany practice-based assessment with ongoing surgical education for the Maintenance of Certification for the American Board of Plastic Surgery. It is structured to outline the care of the patient with the postmastectomy breast deformity.

The Efficacy of Bilateral Lower Abdominal Free Flaps for Unilateral Breast Reconstruction

BACKGROUND

In large-breasted women, those with midline abdominal scars, or those with scant abdominal tissue, a unipedicled lower abdominal flap may be insufficient for breast reconstruction. In these circumstances, bipedicled flaps may best satisfy the reconstructive requirements, but outcomes with bilateral free flaps for unilateral breast reconstruction are generally lacking.

METHODS

A retrospective review of patients in whom two vascular pedicles/flaps were used to simultaneously reconstruct a single breast was used to assess operative outcomes.

RESULTS

Forty patients (80 flaps) for whom two free tissue transfers were used to simultaneously reconstruct a single breast were identified. The majority of patients had a native breast cup size of C or larger. The flaps used included the superficial inferior epigastric artery (SIEA) flap (n = 29; 36 percent), the transverse rectus abdominis musculocutaneous (TRAM) flap (n = 9; 11 percent), the muscle-sparing TRAM flap (n = 15; 19 percent), and the deep inferior epigastric perforator (DIEP) flap (n = 27; 34 percent). Flaps were paired in a variety of configurations, most commonly using a muscle-sparing TRAM flap in conjunction with a DIEP flap or an SIEA flap. Recipient vessels included a combination of the internal mammary and thoracodorsal vessels and the pedicles of combined flaps (turbocharged). There were no flap losses. Two flaps required reexploration for microsurgical anastomotic revision, and both were successfully salvaged. Isolated fat necrosis was encountered in only three of 80 flaps.

CONCLUSIONS

This study suggests that bilateral, bipedicled, abdominal free flaps for unilateral breast reconstruction can be used safely with a high degree of success. These combined flaps provide for enhanced vascular perfusion of the lower abdominal flap territory, allowing for harvest of larger volumes of tissue for reconstruction.

The 3-Hour Muscle-Sparing Free TRAM Flap: Safe and Effective Treatment Review of 111 Consecutive Free TRAM Flaps in a Private Practice Setting

BACKGROUND

The muscle-sparing free transverse rectus abdominis muscle (TRAM) flap is a reliable technique that provides great versatility, with potentially decreased donor-site morbidity. However, because of the inherent nature of microvascular techniques, it is still regarded as a time-consuming and technically difficult procedure. The goal of this retrospective study was to document the validity of this technique in the private practice setting.

METHODS

Data were reviewed retrospectively and included patient demographics, total operative time, choice of recipient vessels, outcome, and perioperative morbidities.

RESULTS

One hundred one consecutive patients underwent 111 muscle-sparing free TRAM flap procedures for breast reconstruction (immediate, 89 patients; delayed, 12 patients). The internal mammary artery was used in 75 cases and the thoracodorsal artery was used in 36 cases. Average operative time was 185 minutes (3 hours 5 minutes). Average blood loss was 195 cc. There was no total flap loss. Revision of the microvascular anastomosis was performed in four patients, with flap salvage in all of them. Thirteen patients (13 percent) required primary mesh for abdominal wall closure. Fourteen (14 percent) had fat necrosis. Two patients had hematoma that required surgical evacuation. Abdominal wall weakness was detected in two patients (2 percent) and required mesh repair.

CONCLUSIONS

The technical difficulties associated with the free TRAM flap have been ameliorated using a well-designed surgical plan and consistent technique performed by a team familiar with the procedure to achieve an acceptable average 3-hour operating time, with minimal complications. The authors advocate the muscle-sparing free TRAM flap as the operation of choice for unilateral breast reconstruction using autogenous tissue. The technique is expeditious and relatively safe.

Use of the internal mammary vein for access outflow in a hemodialysis fistula

A patient with occlusion of multiple central veins from both dialysis and nondialysis catheters required permanent access for hemodialysis. Magnetic resonance imaging showed a patent left innominate vein. He underwent creation of a left axillary artery to internal mammary vein transposition fistula using the basilic vein from his right arm. The fistula has required one revision for outflow stenosis and one for aneurysmal degeneration. It continues to function well 3 years after placement. The internal mammary vein is an option for outflow when permanent hemodialysis access has failed in the presence of a patent innominate vein with occluded or severely stenotic ipsilateral subclavian and jugular veins.

Changing Trends in Recipient Vessel Selection for Microvascular Autologous Breast Reconstruction: An Analysis of 1483 Consecutive Cases

BACKGROUND

Over the years, the authors' preferred recipient vessels for microvascular autologous breast reconstruction have changed from the thoracodorsal to the internal mammary vessels.

METHODS

From 1994 to 2004, 1483 microvascular autologous breast reconstructions were performed in 1168 patients at the authors' institution. Potential factors involved in the selection of the recipient vessels were evaluated and compared between the thoracodorsal and internal mammary groups. Rates of recipient vessel unusability and flap-related complications were also analyzed and compared between the two groups.

RESULTS

The mean patient age was 48 years, and the mean follow-up time was 1.5 years. The vessel conversion rate was 2.8 percent for the thoracodorsal group and 1.9 percent for the internal mammary group. Preoperative radiotherapy and previous axillary node dissection were significantly associated with thoracodorsal vessel conversion (odds ratios, 4.7 and 2.6, respectively). The overall flap-related complication rate (12.6 percent versus 8.6 percent) and specific flap-related complications, including flap loss (2.6 percent versus 3.8 percent), vessel thrombosis (3.7 percent versus 5.0 percent), fat necrosis (4.5 percent versus 2.6 percent), infection (0.7 percent versus 0.7 percent), and hematoma (1.6 percent versus 1.9 percent), were comparable between the two groups, but the flap seroma rate was significantly higher in the thoracodorsal group (4.0 percent versus 0.7 percent; odds ratio, 4.2).

CONCLUSION

In the authors' experience, use of internal mammary vessels is safe, with low rates of vessel conversion and flap-related complications.

Use of the Internal Mammary Vessels as Recipient Vessels for an Omental Flap in Head and Neck Reconstruction

The availability of reliable recipient vessels for free flap transfer in head and neck reconstruction may be limited in cases of prior neck dissection or radiation therapy. One solution is to use the internal mammary vessels as recipients for a free omental flap. Five patients were treated with free omental flap transfer using the internal mammary vessels as recipient vessels during head and neck reconstruction. Two patients presented with a pharyngocutaneous fistula, 1 had mandibular osteomyelitis, 1 had primary esophageal cancer, and 1 had bilateral cervical radiation ulcers. All patients had received radiation therapy previously (average dose, 75.4 Gy), and 4 had undergone neck dissection (3 bilateral and 1 ipsilateral). All patients were reconstructed using a free omental flap. Four patients had a second free flap combined with the free omental flap (3 free jejunal flaps and 1 free fibular osteocutaneous flap). The mean follow-up was 26.4 months. All free flaps took entirely, the only complication ileus requiring reoperation in 1 patient. The internal mammary vessels are reliable recipient vessels for a free omental flap in head and neck reconstruction. This procedure is a good option for patients in whom previous surgery or radiation therapy has compromised local recipient vessels.

Aging is associated with an increased susceptibility to ischaemic necrosis due to microvascular perfusion failure but not a reduction in ischaemic tolerance

In the present study in a murine model of chronic ischaemia, we analysed: (i) whether aging was associated with an increased susceptibility to ischaemic necrosis, and (ii) whether this was based on microvascular dysfunction or reduced ischaemic tolerance. An ischaemic pedicled skin flap was created in the ear of homozygous hairless mice. The animals were assigned to three age groups, including adolescent (2±1 months), adult (10±2 months) and senescent (19±3 months). Microvascular perfusion of the ischaemic flap was assessed over 5 days by intravital microscopy, evaluating FCD (functional capillary density), capillary dilation response and the area of tissue necrosis. Expression of the stress-protein HO (haem oxygenase)-1 was determined by immunohistochemistry and Western blotting. Induction of chronic ischaemia stimulated a significant expression of HO-1 without a significant difference between the three age groups. This was associated with capillary dilation, which, however, was more pronounced in adolescent (10.5±2.8 μm compared with 3.95±0.79 μm at baseline) and adult (12.1±3.1 μm compared with 3.36±0.45 μm at baseline) animals compared with senescent animals (8.5±1.7 μm compared with 3.28±0.69 μm at baseline; P value not significant). In senescent animals, flap creation further resulted in complete cessation of capillary flow in the distal area of the flap (FCD, 0±0 cm/cm2), whereas adult (11.9±13.5 cm/cm2) and, in particular, adolescent animals (58.4±33.6 cm/cm2; P<0.05) were capable of maintaining residual capillary perfusion. The age-associated microcirculatory dysfunction resulted in a significantly increased flap necrosis of 49±8% (P<0.05) and 42±8% (P<0.05) in senescent and adult animals respectively, compared with 31±6% in adolescent mice. Of interest, functional inhibition of HO-1 by SnPP-IX (tin protoporphyrin-IX) in adolescent mice abrogated capillary dilation, decreased functional capillary density and aggravated tissue necrosis comparably with that observed in senescent mice. Thus aging is associated with an increased susceptibility to tissue necrosis, which is due to a loss of vascular reactivity to endogenous HO-1 expression, rather than a reduction in ischaemic tolerance.