100 Steps of a DIEP Flap-A Prospective Comparative Cohort Series Demonstrating the Successful Implementation of Process Mapping in Microsurgery

The first 150 consecutive DIEP free flaps: Lessons learnt and a guide to efficiency for the junior plastic surgeon

Introduction

The deep inferior epigastric artery perforator (DIEP) free flap is the gold-standard for breast reconstruction but is technically demanding, resource intensive and time-consuming, making it a daunting task for the junior surgeon.

Aim

To report the lessons learnt from the experience of a single surgeon performing their first 150 DIEP reconstructions as a guide for junior surgeons.

Methods

Data regarding patient demographics and surgical outcomes from April 2021 to October 2022 were collected retrospectively from medical records. Surgical outcomes were analysed using Microsoft Excel.

Results

Over 17 months, 150 flaps were completed in 97 patients by the senior author (BS). Operative duration was negatively correlated with case number for unilateral DIEPs (r = -0.73, p < 0.05) and for bilateral DIEPs (r = -0.67, p = 0.14). Raise time and ischaemic time were also negatively correlated with case number (r = -0.82, p < 0.05 and r = -0.79, p < 0.05, respectively). There were 10 complications and no flap losses.

Discussion

The data demonstrate an expected improvement in surgical efficiency with increased experience. We describe the key factors contributing to efficiency in our series, such as preoperative CT angiography, surgical markings prior to the day of surgery, a two-team approach with three diathermy sets, flap raise using monopolar diathermy, preference towards choosing a single dominant perforator and early commitment to perforator choice. This case series acts as a guide for the junior plastic surgeon in achieving safe, aesthetic and efficient results when completing free DIEP flap breast reconstructions.

Optimizing Aesthetic Outcomes in Autologous Breast Reconstruction: 20 Pearls for Practice

Autologous breast reconstruction with a deep inferior epigastric artery perforator (DIEP) flap is an excellent option for many patients proceeding with mastectomy for surgical management of their breast cancer. As microsurgical techniques and results improve and ensure consistent flap survival, optimizing aesthetic outcomes may become a primary focus. This article outlines 20 tips that can improve aesthetic results in DIEP flap breast reconstruction, based on our senior author's 8-year career in microsurgical breast reconstruction, with an emphasis on enhanced cosmesis. We highlight tips on preoperative planning, intraoperative, and revision stages of the reconstruction and provide a schematic for integrating the tips into a reader's microsurgical breast reconstruction practice.

Operative Time Predicts Long-Term Abdominal Morbidity and Complication Requiring Treatment after DIEP Flap Breast Reconstruction

BACKGROUND

 The relationship between skin-to-skin operative time and long-term complications, as well as complications requiring treatment, after deep inferior epigastric perforator (DIEP) flap breast reconstructions has not been thoroughly investigated. The study objective was to evaluate if operative time would independently prognosticate the type and number of treated complications, as well as long-term abdominal morbidity.

METHODS

 Patients who underwent bilateral DIEP flaps from 2010 to 2021 by two senior surgeons with standardized surgical and postoperative protocols were retrospectively reviewed. Inclusion required at least 1 year of postoperative follow-up. Extensive multivariable regression analyses were utilized to adjust for potential confounders, including measures of intraoperative complexity.

RESULTS

 Three hundred thirty-five patients were entered into multivariable analyses. After risk adjustment, there was a significant increase in the risk of all treated complications per hour. Each hour of operation increased risk of complications requiring extended hospital stay for treatment by 25%, flap-site complications requiring readmission treatment by 24%, and flap-site complications requiring extended hospital stay for treatment by 26% (all p < 0.0001). Long-term abdominal morbidity (abdominal bulge) increased by 25% per hour of operative time (p < 0.0001). The number of complications requiring treatment, abdominal donor-site complications, and complications requiring extended hospital stay for treatment had statistically significant linear relationships with the duration of surgery (all p < 0.05).

CONCLUSION

 Operative time predicts long-term abdominal morbidity and complications requiring treatment, especially impacting the odds of developing abdominal bulges and complications requiring extended hospital stay for treatment or readmission treatment. This study emphasizes the importance of reducing operative time to improve DIEP flap breast reconstruction outcomes.

Reduction in Seroma Rate Following Deep Inferior Epigastric Perforator Flap with Umbilectomy Utilizing Progressive Tension Sutures

BACKGROUND

 Umbilectomy has been implemented in both abdominoplasties and deep inferior epigastric perforator (DIEP) flaps to improve abdominal wound healing and better control the location of the neoumbilicus; however, seroma rates are increased. The objective of this study is to compare the seroma rate following DIEP flap reconstruction with umbilectomy when progressive tension sutures (PTS) are implemented.

METHODS

 A retrospective chart review was performed to evaluate postoperative seroma rates in patients undergoing DIEP flap breast reconstruction at a single academic institution between January 2015 and September 2022. All procedures were performed by two senior surgeons. Patients were included if their umbilicus was removed intraoperatively. PTS were utilized in all abdominal closures beginning in late February 2022. Demographics, comorbidities, and postoperative complications were evaluated.

RESULTS

 A total of 241 patients underwent DIEP flap breast reconstruction with intraoperative umbilectomy. Forty-three consecutive patients received PTS. Overall complications were significantly lower in those who received PTS (p = 0.007). There were no abdominal seromas (0%) in patients who received PTS, whereas 14 (7.1%) occurred without PTS. The use of PTS conferred a decreased likelihood of abdominal seroma (5.687× lower risk, p = 0.017). Additionally, wound formation was significantly lower in those who received PTS (p = 0.031).

CONCLUSION

 The use of PTS in the abdominal closure during DIEP flap reconstruction addresses the previously seen rise in seroma rates when concomitant umbilectomy is performed. Decrease in both donor-site wounds and now seroma rates reaffirm the efficacy of removing the umbilicus to improve patient outcomes.

Moving the needle: a narrative review of enhanced recovery protocols in breast reconstruction

Background and Objective

After a relatively late introduction to the literature in 2015, enhanced recovery protocols for breast reconstruction have flourished into a wealth of reports. Many have since described unique methodologies making improved offerings with superior outcomes attainable. This is a particularly interesting procedure for the study of enhanced recovery as it encompasses two dissident approaches. Compared to implant-based reconstruction, autologous free-flap reconstruction has demonstrated superiority in a range of long-term metrics at the expense of historically increased peri-operative morbidity. This narrative review collates reports of recovery protocols for both approaches and examines methodologies surrounding the key pieces of a comprehensive pathway.

Methods

All primary clinical reports specifically describing enhanced recovery protocols for implant-based and autologous breast reconstruction through 2022 were identified by systematic review of PubMed and Embase libraries. Twenty-five reports meeting criteria were identified, with ten additional reports included for narrative purpose. Included studies were examined for facets of innovation from the pre-hospital setting through outpatient follow-up. Notable findings were described in the context of a comprehensive framework with attention paid to clinical and basic scientific background. Considerations for implementation were additionally discussed.

Key Content and Findings

Of 35 included studies, 29 regarded autologous reconstruction with majority focus on reduction of peri-operative opioid requirements and length of stay. Six regarded implant-based reconstruction with most discussing pathways towards ambulatory procedures. Eighty percent of included studies were published after the 2017 consensus guidelines with many described innovations to this baseline. Pathways included considerations for pre-hospital, pre-operative, intra-operative, inpatient, and outpatient settings. Implant-based studies demonstrated that safe ambulatory care is accessible. Autologous studies demonstrated a trend towards discharge before post-operative day three and peri-operative opioid requirements equivalent to those of implant-based reconstructions.

Conclusions

Study of enhanced recovery after breast reconstruction has inspired paradigm shift and pushed limits previously not thought to be attainable. These protocols should encompass a longitudinal care pathway with optimization through patient-centered approaches and multidisciplinary collaboration. This framework should represent standard of care and will serve to expand availability of all methods of breast reconstruction.

Deliberate Practice in DIEP Flap Breast Reconstruction: An Immediate and Sustained Decrease in Morbidity and Operative Time

BACKGROUND

Deep inferior epigastric perforator (DIEP) flaps are nuanced, multistep, complex procedures. Recent studies have hinted that operational flow can be a sensitive barometer for safety, efficiency, and overall outcomes. The authors critically assess the utility of implementing deliberate practice and process mapping as a research tool in the context of morbidity and operative time.

METHODS

Co-surgeons at a university hospital implemented deliberate practice and performed two prospective process analysis studies evaluating critical steps in DIEP flap reconstruction. During the 9-month period (June of 2018 to February of 2019), the flap harvest and microsurgery steps were assessed. During the 8-month period (January to August of 2020), the analysis was expanded to encompass the entire operation. To evaluate the immediate and sustained impact of process analysis, 375 bilateral DIEP flap patients were divided into eight consecutive 9-month intervals completed before, during, and after the two studies. Using risk-adjusted multivariate regressions, morbidity and operative time were compared between groups.

RESULTS

Time intervals completed before the first study had comparable morbidity and operative time. During the first study, there was an immediate 83.8% ( P < 0.001) decreased risk in morbidity. Operative time during the second study decreased by 2.19 hours ( P < 0.001). Morbidity and operative time continued to decrease until the end of data collection [62.1% decreased risk in morbidity ( P = 0.023) and decreased operative time of 2.22 hours ( P < 0.001)].

CONCLUSIONS

Deliberate practice and process analysis are powerful tools. Implementation of these tools can generate immediate and sustained decreases in morbidity and operative time for patients undergoing procedures such as DIEP flap breast reconstruction.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, III.

A clinical practice review on process efficiency in autologous breast reconstruction

Autologous breast reconstruction is considered the gold standard technique for breast reconstruction following mastectomy. Thanks to recent refinements the main focus of surgery has shifted from flaps survival and donor site morbidity to optimal aesthetic outcomes and patients' satisfaction. However, prolonged operative time remains a limiting aspect for many patients and surgeons who aim in improving access to care and outcomes. Process mapping is a quality improvement strategy consisting of the creation of a visual representation of a process to recognize errors, minimize waste and optimize outcomes. It has been effectively applied in abdominal based autologous breast reconstruction in nine papers. The process segments and analysis varied between published papers, but all authors focused on intraoperative process mapping and reported reduced operative times. Additional preoperative and postoperative factors have been studied and are commonly applied to further optimize efficiency (such as preoperative CTA, co-surgery model, flap perfusion evaluation, postoperative monitoring, and ERAS protocol). Although shorter operative times are related to decrease surgical morbidity and faster recovery time, and safety, the aesthetic outcome should remain the main focus in autologous breast reconstruction. In fact, the true ultimate aim should be the achievement of high patient satisfaction.

Trends and Innovations in Autologous Breast Reconstruction

More than 40 years have passed since the description of the first "free abdominoplasty flap" for breast reconstruction by Holmström. In the meantime, surgical advances and technological innovations have resulted in the widespread adoption of autologous breast reconstruction to recreate the female breast after mastectomy. While concepts and techniques are continuing to evolve, maintaining an overview is challenging. This article provides a review of current trends and recent innovations in autologous breast reconstruction.

Using a Business Model (the 4 Disciplines of Execution) to Improve Consistency, Efficiency, and Length of Stay in Microvascular Autologous Breast Reconstruction

BACKGROUND

Autologous free tissue transfer is a common method of breast reconstruction in the United States, but it involves many care teams and can incur a large cost on an institution. The consistency and efficiency of performing these procedures can be improved with a method called the 4 disciplines of execution (4DX).

METHODS

Patients that underwent autologous breast reconstruction between 2015 and 2020 were included. Midway through the collection period, several preoperative and intraoperative interventions were implemented using the 4DX. Then, 2 cohorts of patients were analyzed for differences in operative times, length of stay (LOS), and major complications.

RESULTS

Thirty-two total patients were included. The median operative time before interventions were implemented was 828 minutes, and the median operative time after interventions was 619 minutes (P < 0.05). The median LOS in days before interventions was 5 days, and the median LOS after interventions was 3 days (P < 0.05). There were no statistically significant differences in complications before or after the interventions.

CONCLUSIONS

The 4DX successfully improved consistency and efficiency in the process of performing autologous breast reconstruction at our institution, as evidenced by a faster median operative time and shorter patient LOS in the hospital.

Anatomic Comparison of Recipient Nerves for Deep Inferior Epigastric Perforator Flap Neurotization: A Randomized Control Trial

INTRODUCTION

Although neurotization has the potential to improve sensory outcomes after autologous breast reconstruction, this technique remains controversial. There is debate regarding the clinical outcomes and the recipient nerve of choice. This histoanatomical study aims to quantitatively compare the sensory components of the recipient nerves involved in neurotization of the deep inferior epigastric perforator flap.

METHODS

Subjects undergoing bilateral autologous breast reconstruction were enrolled. Transected nerve specimens underwent immunohistochemical staining with antibodies against neurofilament 1 and choline acetyltransferase for total and motor neurons within the axons, respectively. Photomicrographs were captured, and axons were analyzed using ImageJ. Sensory axons were calculated as equal to the difference between the total and cholinergic axonal counts.

RESULTS

Thirty-eight nerves from 19 subjects were included. The overall mean sensory axon count was 1246.3 (±1171.9) in the lateral cutaneous branch (LCB) of the fourth intercostal nerve and 1123.8 (±1213.0) in the anterior cutaneous branch (ACB) of the third intercostal nerve.The fourth LCB presented with an additional 10.9% sensory axonal count (P > 0.05). On average, sensory fibers constituted 36.7% and 31.7% of all fibers in the third ACBs and fourth LCBs, respectively.

CONCLUSIONS

This study provides anatomic and histological evidence that the fourth LCB and third ACB contain comparable mean numbers of sensory axons. Both constitute adequate recipient nerves for coaptation in deep inferior epigastric perforator reinnervation to achieve optimal sensory return after breast reconstruction. The fourth LCB should be preferable when the third ACB remains intact to preserve any native breast flap sensation.

Efficient DIEP Flap: Bilateral Breast Reconstruction in Less Than Four Hours

INTRODUCTION

The DIEP flap is considered the gold standard in autologous breast reconstruction. Despite the benefit of a lifelong natural reconstruction, some argue that the potential drawbacks, specifically operative time and recovery, are significant. We recently focused specifically on process analysis in our DIEP flap practice and present a comprehensive analysis in efficient DIEP flap breast reconstructions.

METHODS

Fifty consecutive bilateral DIEP flaps were prospectively tracked (100 flaps). The procedure was divided into segments (recipient site preparation, DIEP flap dissection/harvest, microsurgery, breast shaping, and abdominal closure). All individual step times were recorded for each team member. Relevant patient characteristics, intraoperative details and postoperative outcomes were recorded.

RESULTS

Average surgical time was 3 hours and 58 minutes (the fastest time recorded was 2 h and 14 min). There were no immediate postoperative complications. The anastomotic revision rate was 6%. Four surgeons contributed 34.7% of the time, three surgeons 32.2% of the time, two surgeons 23.6% of the time, and one surgeon 4.8% of total time. In procedures under 4 hours, four surgeons contributed simultaneously 36.7% of the time compared to 21.8% in the longer procedures (P = 0.004). Four surgeons contributed 45.4% of the time (P = 0.01) in the sub-three-hour bilateral DIEP flap procedures.

CONCLUSIONS

Efficient DIEP flap breast reconstruction can be accomplished with a well-trained and coordinated team approach involving like-minded surgeons with extensive experience working together. The synergistic map shows constant movement with utilization of hidden time, without sacrificing education, outcomes, or innovation.

Perception of Breast Reconstruction among 10,299 Indian Women

Background

Less than 1% of women undergo breast reconstruction after mastectomy in India. To understand if the perception of breast reconstruction among Indian women is a contributing factor, a survey of 10,299 women was done.

Method In total

10,299 women answered questions from a questionnaire with the help of social workers (10,005) and using the Surveymonkey App (294).

Results An estimated

48.8% of women were aware of breast reconstruction. Around 77.5% felt that women would feel depressed after mastectomy, and 76.5% said they would prefer breast reconstruction. Irrespective of age and financial status, most women preferred breast reconstruction after mastectomy. Autologous reconstruction (79.6%) was preferred to implant reconstruction (20.4%). An estimated 71.3% liked the idea of a DIEP flap. When explained that DIEP flap may take 6-8 hours of surgery and cost about US $3500, only 48.8% would go for a DIEP flap. For early breast cancers, women preferred breast conservation surgery (65.7%) to mastectomy and breast reconstruction (34.3%). Women felt that the best way to increase awareness of breast reconstruction would be by social media (47.8%) followed by word of mouth (16.4%), television (13.4%), newspapers (11.7%), and magazines (10.6%).

Conclusions

Although the breast reconstruction rates are very low, women preferred breast reconstruction to mastectomy alone regardless of age and financial status. The surgical teams should devise strategies to assure woman that they can achieve reliable reconstruction at an affordable cost. Increasing experience and reduction of operation time would make autologous breast reconstruction affordable. This strategy could apply to most developing economies.

Process mapping in healthcare: a systematic review

INTRODUCTION

Process mapping (PM) supports better understanding of complex systems and adaptation of improvement interventions to their local context. However, there is little research on its use in healthcare. This study (i) proposes a conceptual framework outlining quality criteria to guide the effective implementation, evaluation and reporting of PM in healthcare; (ii) reviews published PM cases to identify context and quality of PM application, and the reported benefits of using PM in healthcare.

METHODS

We developed the conceptual framework by reviewing methodological guidance on PM and empirical literature on its use in healthcare improvement interventions. We conducted a systematic review of empirical literature using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) methodology. Inclusion criteria were: full text empirical study; describing the process through which PM has been applied in a healthcare setting; published in English. Databases searched are: Medline, Embase, HMIC-Health Management Information Consortium, CINAHL-Cumulative Index to Nursing and Allied Health Literature, Scopus. Two independent reviewers extracted and analysed data. Each manuscript underwent line by line coding. The conceptual framework was used to evaluate adherence of empirical studies to the identified PM quality criteria. Context in which PM is used and benefits of using PM were coded using an inductive thematic analysis approach.

RESULTS

The framework outlines quality criteria for each PM phase: (i) preparation, planning and process identification, (ii) data and information gathering, (iii) process map generation, (iv) analysis, (v) taking it forward. PM is used in a variety of settings and approaches to improvement. None of the reviewed studies (N = 105) met all ten quality criteria; 7% were compliant with 8/10 or 9/10 criteria. 45% of studies reported that PM was generated through multi-professional meetings and 15% reported patient involvement. Studies highlighted the value of PM in navigating the complexity characterising healthcare improvement interventions.

CONCLUSION

The full potential of PM is inhibited by variance in reporting and poor adherence to underpinning principles. Greater rigour in the application of the method is required. We encourage the use and further development of the proposed framework to support training, application and reporting of PM.

TRIAL REGISTRATION

Prospero ID: CRD42017082140.

Process Mapping Total Knee Arthroplasty: A Comparison of Instrument Designs

BACKGROUND

Total knee arthroplasty (TKA) is commonly performed with proprietary, manual instrumentation provided by the surgical implant manufacturer. Registry studies and meta-analysis, with few outliers, have consistently shown similar functional outcomes and implant survival after TKA regardless of implant manufacturer, implant design, or surgical technique. We hypothesized that process mapping could identify areas for improvement in TKA instrumentation.

METHODS

Seventeen TKA implant systems from 10 companies representing over 90% of all TKAs performed in the United States were evaluated. Instrumentation required for femoral, tibial, and patellar preparation was compared. The number of steps including surgical technician assembly steps, instrument handoffs, and surgeon steps were tabulated based off application of a standardized surgical flow, adjusted for manufacturer-recommended steps during completion of a TKA operation.

RESULTS

Cruciate-retaining (CR) knee instrumentation in studied systems required 158-225 discrete steps and posterior-stabilized (PS) knees required 181-230 steps. With the fewest steps for femoral, tibial, and patellar instrumentation, CR and PS knee systems could be improved to 145 and 163 steps, respectively. The Arthrex iBalance and the Biomet Vanguard Microplasty required fewest steps among CR systems; the OrthoDevelopment Balanced and the Corin Unity required fewest steps among PS systems.

CONCLUSIONS

Process mapping identified potential areas for improved instrumentation in all studied systems, suggesting the possibility to reduce operative steps broadly across the TKA industry. Patient outcomes were not evaluated by system. Future implant system design changes may do well to reduce unnecessary steps and instrumentation.

The Sc-GAP makeover flap: eliminating the need for position changes in gluteal flap breast reconstruction

Background

The gluteal region is one of the many alternative donor sites for autologous breast reconstruction. However, the harvest of the gluteal flap is rather difficult, and the major drawback of gluteal flaps has been the need for position changes for flap harvest and inset. A new approach of a gluteal flap is introduced, based on the septocutaneous perforators of the superior gluteal artery: the septocutaneous gluteal artery perforator (Sc-GAP) makeover flap.

Methods

A prospective study was performed in Maastricht University Medical Center between January 2018 and December 2019. Patients who underwent a Sc-GAP makeover flap breast reconstruction in the Maastricht University Medical Center and have had preoperative magnetic resonance angiography (MRA) of the abdomen between January 2018 and June 2019 were included.

Results

Nine patients underwent breast reconstruction with thirteen Sc-GAP makeover flaps, of which nine flaps were innervated. Indications were the abdomen not being available as a donor site (n = 4) or the flank region was preferred as a donor site by the patient (n = 5). The total operative time was 430 min on average (range 311–683). Mean flap weight was 638 g (range 370–1004) and the mean ischemia time was 53 ± 9.96 min. Coupler size used was 2.0–2.5 mm. All flaps survived.

Conclusion

The Sc-GAP makeover flap overcomes the disadvantages of the conventional gluteal flaps, especially by eliminating the need for position changes during the reconstruction procedure. It is a reliable flap that provides sufficient volume and good esthetic outcomes.

Level of evidence: Level IV, therapeutic study.

Deconstructing the Reconstruction: Evaluation of Process and Efficiency in Deep Inferior Epigastric Perforator Flaps

BACKGROUND

With advances in technology and technique, the goal of microvascular breast reconstruction has transitioned from flap success to minimizing complications and maximizing aesthetic outcome and efficiency. In an effort to evaluate efficiency, the authors implemented a rigorous process analysis in their practice to evaluate deep inferior epigastric perforator (DIEP) flap breast reconstruction.

METHODS

A prospective implementation of process analysis was instituted on 147 DIEP flaps. The eight critical maneuvers for a DIEP flap are (1) skin to perforator identification, (2) perforator decision making, (3) perforator dissection, (4) pedicle dissection, (5) flap harvest, (6) preparation for microsurgery, (7) venous anastomosis, and (8) arterial anastomosis. Surgeons with variable experiences (faculty, faculty with senior resident/fellow, and supervised chief resident) used these eight steps to perform DIEP flap reconstruction. The outcomes and time of each maneuver were tracked.

RESULTS

The total flap harvest time among the three groups was 54.8 minutes for faculty surgeons, 98.3 minutes for senior resident/fellow working with faculty, and 178.8 minutes for supervised chief resident (p < 0.001). The largest difference was seen in perforator dissection. Increasing the number of perforators resulted in longer flap harvest times. Perforator location did not have an impact on times, but harvesting multiple rows took longer for less experienced surgeons. Body mass index and flap weight did not have an impact on time.

CONCLUSIONS

The authors share their experience using process analysis for DIEP flap reconstruction. They defined eight critical maneuvers to maximize efficiency and safety. By communicating efficient processes and integrating them into the workflow of a given operation, surgeons can continue to improve throughout the arc of their careers.