Microvascular Free Tissue Transfer Research Articles

The Future of free flap monitoring by Laser Continuous Doppler Flowmetry: A prospective assessment in consecutive 71 patients

Objective: This study evaluates the effectiveness of Laser Doppler Flowmetry (LDF) in detecting perfusion disturbances during microvascular free tissue transfer. Methods: Conducted at a single centre from December 2020 to September 2022, this prospective study involved 71 patients mainly undergoing head and neck free flap reconstructions, using the Pocket LDF™ for continuous perfusion monitoring. Results: Out of the 71 cases, data from 69 cases were analysed after excluding those with significant noise or sensor detachment. Blood flow disturbances were observed in 9 cases (13.0%), with 5 of these cases having a history of surgery or radiation in the same area. There were 5 cases of ischaemia, 4 of which occurred during monitoring. There were 4 cases of venous congestion, with 1 occurring during monitoring. Reoperation was necessary in 8 cases (11.6%), involving flap replacements, vascular re-anastomoses, and hematoma evacuation. Complete flap necrosis occurred in 5 cases (7.2%), and partial necrosis occurred in 3 cases (4.3%). The LDF device demonstrated the ability to identify perfusion issues hours before clinical symptoms manifested, suggesting its potential for early intervention. However, challenges included maintaining continuous monitoring immediately post-surgery and during patient transfers. Conclusion: LDF is a valuable, non-invasive tool for early detection of perfusion disturbances in free flap procedures. It provides continuous, real-time feedback on microcirculation, facilitating timely interventions. Despite its benefits, enhancements in sensor adhesion and wireless technology are needed to improve monitoring reliability. Further studies are recommended to refine LDF usage and validate its efficacy in various clinical settings.

Vital Staining Role in Resection and Reconstruction of Tongue Cancers with Free Flap - A Comparative Study

Abstract Introduction: The purpose of this study is to compare and infer the most suitable dye for visualisation of ipsilateral and contralateral sentinel lymph nodes (SLNs), positive, negative outcomes, sensitivity, their specificities and visualisation of anastomosed blood vessels in microvascular reconstruction of tongue cancers. Materials and Methods: This is a prospective in vivo comparative study involving twenty patients diagnosed with squamous cell carcinoma of the tongue treated with wide excision of primary tongue tumour, modified functional neck dissection and microvascular reconstruction with radial forearm free flap. Consecutive random allocation was done into two groups with ten patients each. Patients were injected with methylene blue as the first group and near-infrared fluorescence indocyanine green (ICG) into the second. The patients were evaluated intraoperatively regarding the better dye in methylene blue and ICG for identification of ipsilateral and contralateral SLNs, their positive, negative outcomes, sensitivity and specificities. Apart from these, in cases of group B, after microvascular transfers, ICG is used for visualisation of anastomosed vessels to prevent abnormal perfusions, leaks and post–flap failures. Descriptive statistics, independent samples t-test, and Chi-square were used for statistical analysis. Results: The present study revealed ICG being the better dye in the parameters mentioned. Discussion: Lymph node yield in neck dissection is a prognostic factor in oral cancers. ICG is inferred as the better dye for identification of SLN with 100% outcomes and in blood vessel visualisation after microvascular free tissue transfers. It is also useful in identifying positive contralateral sentinel nodes, which is helpful in undertaking bilateral neck dissections related to tongue carcinoma.

Cross-Leg Microvascular Free Anterolateral Thigh Flap as a Safe, Viable, and Reserve Option for Reconstruction in a Vessel-Depleted Limb

AbstractWe present the case of a 36-year-old male patient with a posttraumatic composite defect of the lower two-thirds of the anterior aspect of the left leg with exposed necrotic tibia in an old, neglected type 3b fracture of the tibia of 9-month duration. The options for definitive soft-tissue cover include microvascular free tissue transfer and cross-leg flaps. In trauma cases, the surrounding tissue is usually damaged, and the recipient vessels are frequently implicated, ruling out the use of a microvascular free flap. Cross-leg flaps are unachievable due to large defect sizes and lack of appropriate donor tissue. In this case report, we highlight the use of cross-leg microvascular free anterolateral thigh (ALT) flap cover for the composite leg defect. By presenting our case, we aim to advocate the clinical application of cross-leg free flap surgery in vessel-depleted limbs as a safe and viable option.

Perioperative Management for Microvascular Free Tissue Transfer for Head and Neck Reconstruction – Commentary

Le et al. provided a comprehensive commentary on perioperative management for head and neck oncologic patients undergoing microvascular reconstructive surgery. This commentary is based on a detailed review and consensus statements from the Society for Head and Neck Anesthesia (SHANA), an international organization dedicated to enhancing perioperative care for these patients. The consensus statement, published in 2021 by Healy et al., addressed preoperative, intraoperative, and postoperative considerations to optimize clinical outcomes. It included 14 statements from 16 SHANA members across 11 institutions, following two rounds of literature reviews. The commentary emphasized the importance of preoperative nutrition optimization, tobacco cessation, and early recognition of alcohol withdrawal symptoms. In the intraoperative phase, key aspects such as airway management in cases of extensive tumor burden (including awake fiberoptic intubation and tracheostomy), fluid management, hemodynamic monitoring, and multimodal analgesia were briefly discussed. Notably, vasopressors can be used to optimize hemodynamic management without compromising flap perfusion. Additionally, careful fluid resuscitation is crucial to avoid fluid overload, which could increase the risk of flap failure. Multimodal pain management strategies were highlighted, including inhalational anesthetics, anti-inflammatories, narcotics, and regional anesthesia. In the postoperative period, effective communication between healthcare provider teams is essential. Airway management was linked to three of the five consensus statements, underscoring the need for clear and concise communication between the anesthesia and surgical teams. This includes coordinating ventilatory support weaning, extubation planning, and preparation for reintubation if necessary. Such measures help reduce intensive care unit (ICU) utilization, minimize airway-related adverse events, and shorten the length of hospitalization. Overall, the commentary hopes to serve as a guide for multidisciplinary head and neck oncology units across all international centers in managing this complex patient population.

Computer-Aided Design and Manufacturing to Facilitate Microvascular Free Tissue Transfer in Extremity, Pelvic, and Spinal Reconstructions.

Numerous surgical fields have embraced computer-aided design and computer-aided manufacturing (CAD/CAM), including plastic and reconstructive surgery. However, most of the literature and clinical use pertains to reconstruction of the head and neck. Herein, we provide a case series and systematic review of the literature, documenting the use of CAD/CAM in facilitating complex microvascular free tissue transfer for reconstructions involving the extremities, pelvis, and spine (EPS). This study consisted of two components: a case series and a systematic review of the literature. For the case series, the senior author's cases that included CAD/CAM to assist microvascular free tissue transfer reconstructions of the EPS were included. For the systematic review, all PubMed-, Scopus-, and Google Scholar-indexed studies describing the use of CAD/CAM to facilitate free tissue transfer in the EPS were identified and included using PRSMA guidelines. The case series identified 10 patients who received CAD/CAM-assisted microvascular reconstruction. Our systematic review identified 15 articles, representing 124 patients and 133 CAD/CAM-assisted free tissue transfers. Most authors believed that CAD/CAM facilitated a more efficient operation by shifting much of the intraoperative planning to the preoperative phase, ultimately translating to a shorter and more accurate surgery with improved function and cosmesis. CAD/CAM can be used to facilitate microvascular reconstruction of the EPS. Our cases series and systematic review suggest that CAD/CAM for EPS surgery may improve outcomes.

Postoperative Sedation in Free Microvascular Tissue Transfer in Head and Neck Cancer: A Comparison of Fentanyl and Morphine

Background and Aims: Head-and-neck cancer surgeries with microvascular free flap reconstruction require endotracheal tube retention for 24–48 h postoperatively. Many regimes have been used for analgesia and sedation. The efficacy of fentanyl and morphine for post-operative analgosedation was compared by evaluating the need for additional sedatives to achieve optimum sedation scores. The secondary objective included analgesia, haemodynamic stability and a re-exploration rate. Methods: This was an open-label prospective study. A sample size of 36 was calculated in each group with α = 0.05 and a power of 80% to detect a 50% difference between the groups. Ninety adult patients were allocated to receive either fentanyl (Group F) or morphine (Group M). The Richmond agitation sedation score, Behavioural pain scale score, requirement of rescue hypnotic drug, pulse rate, systolic and diastolic blood pressures and re-explorations were recorded postoperatively. Haemodynamic parameters and sedation were analysed by two-way repeated measures of analysis variances. Pain scores were analysed using the Chi-square test. Results: When titrating to optimal sedation, in Group M, more patients needed intravenous midazolam boluses (n = 42, 93.3%) as compared to Group F (n = 33, 73.3%) (P = 0.011). More subjects in Group M required propofol infusion (n = 15, 33.3%) than in Group F (n = 4, 8.9%) (P = 0.009). Mean behavioural pain scores were significantly higher in Group M (score 1: P = 0.005 and score 2: P =0.001). The difference in the mean systolic, diastolic blood pressure, pulse rate, respiratory rate and re-exploration rate between the two groups was statistically insignificant. Conclusion: For analgesia-based sedation of spontaneously breathing intubated patients after head-and-neck cancer reconstructive surgeries, fentanyl is more effective than morphine in terms of ease of titration, sedation quality and analgesia. Both are safe for post-operative sedation regarding haemodynamic stability, tube retention and maintenance of spontaneous respiration.

P.417: Free microvascular tissue transfers in solid organ transplant candidates and recipients.

P.417: Free microvascular tissue transfers in solid organ transplant candidates and recipients.

Preoperative Hypoalbuminemia Predicts 30-day Complications in Head and Neck Microvascular Surgery.

Hypoalbuminemia, a marker for poor nutritional status, has been associated with postoperative complications, including head and neck cancer surgery. This study investigates the impact of hypoalbuminemia on head and neck microvascular free tissue transfer reconstruction. This retrospective cohort study queried the 2005-2021 American College of Surgeons National Surgical Quality Improvement Program databases. Reconstructive cases performed by otolaryngologists (CPT: 15756, 15757, 15758, 15842, 20955, 20956, 20957, 20962, 20969, 20970, 20972, 20973, 43116, 43496, 49006, and 49906) with available preoperative albumin, BMI, and age were included. Hypoalbuminemia was defined as a preoperative albumin <3.5 g/dL. Univariate and multivariable logistic regression were performed. A total of 3,886 cases met the inclusion criteria, of which 835 (21.5%) had hypoalbuminemia. The hypoalbuminemia cohort was older, had lower BMI, had higher ASA classification, and had worse functional health status. Adjusted multivariable logistic regression showed that hypoalbuminemia was associated with unplanned return to the operating room within 30 days (OR: 1.36, p < 0.01), unplanned reoperation (OR: 1.36, p < 0.01), any complication (OR: 1.77, p < 0.01), surgical complications (OR: 1.94, p < 0.01), and medical complications (OR: 1.34, p = 0.01). Hypoalbuminemia was correlated with a longer hospital stay, superficial surgical site infection, wound dehiscence, transfusion, deep vein thrombosis, and acute renal failure. Hypoalbuminemia is a risk factor for postoperative complications after microvascular free tissue transfer for head and neck reconstruction. This study suggests that preoperative optimization of hypoalbuminemia may be beneficial for these patients. 3 Laryngoscope, 2024.

Positive Trends in Racial Disparities for Head and Neck Microvascular Reconstructive Surgery.

To evaluate national trends in racial disparities for patients undergoing head and neck reconstructive surgery. Retrospective analysis using the 2008 to 2021 American College of Surgeons National Surgical Quality Improvement Program database. Patients receiving microvascular free tissue transfer were eligible for inclusion. Pediatric patients and those treated by non-otolaryngologists were excluded. Outcomes were analyzed with univariate and multivariable models. A total of 5831 head and neck free flap cases were analyzed, 4869 (83.5%) were White, 560 (9.6%) were Black or African American, and 402 (6.9%) were Asian, Native American, or other groups (ANAOG). The proportion of Black or African American patients and ANAOG patients undergoing free tissue transfer increased significantly over the time period (p = 0.047 and p = 0.010, respectively). However, there was a downtrend that started around 2017. In a multivariable model, Black or African American race was not associated with readmission (OR = 0.99 [95% CI 0.74, 1.31], p > 0.05), returning to the operating room (OR = 1.20 [95% CI 0.96, 1.49], p > 0.05), or any post-operative complication (OR = 0.83 [95% CI 0.68, 1.01], p > 0.05). There were also no significant associations found in the ANAOG population on multivariate analysis (p > 0.05 for all). The percentage of free tissue transfer performed in patients from minority backgrounds with head and neck cancer has been increasing in the United States. Outcomes after head and neck microvascular reconstruction are similar when stratified by race. However, racial disparities remain and further work is necessary to reduce these disparities. Level IV Laryngoscope, 2024.

Microvascular Free-Flap Head and Neck Reconstruction: The Utility of the Modified Frailty Five-Item Index.

Microvascular free tissue transfer is a common tool for the reconstruction of oncologic head and neck defects. Adequate preoperative assessment can aid in appropriate risk stratification and peri-operative optimization. The modified five-item frailty index (mFI-5) is a validated risk-assessment scale; however, its utility in head and neck free-flap reconstruction is unknown when compared with other common risk factors. A retrospective, single-institution chart review (2017-2020) was performed. Patient demographics, defect and repair characteristics, pre- and peri-operative factors, and flap outcomes were recorded. A high mFI-5 score was defined as greater than 2. The total score, as well as other patient factors, was correlated to postoperative flap complications. A total of 214 patients were deemed appropriate for conclusion. The mean age was 63.9 ± 12.8 years. There were an even number of males (52.8%) and females (47.2%). A fifth of subjects (20.8%) underwent preoperative radiotherapy. There were 21 cases (9.8%) of complete flap loss. A total of 34 patients (29.4%) experienced any postoperative complication related to flap outcomes. An elevated mFI-5 was significantly associated with a higher overall rate of postoperative complications (39.7 vs. 29.4%, p < 0.019) and total flap loss (16.7% vs. 6.6%, p < 0.033). Preoperative radiation was found to be associated with an increased complication rate (p < 0.003). The mFI-5 score may be a potentially significant tool in the risk stratification of patients undergoing head and neck free-flap reconstruction as opposed to commonly utilized risk factors. Preoperative radiotherapy is significantly associated with postoperative complications. Appropriate preoperative assessment may help tailor patient care preoperatively.

Safety of An Enhanced Recovery After Surgery Protocol After Head and Neck Free Tissue Transfer.

Implementing enhanced recovery after surgery (ERAS) protocols and decreasing length of stay (LOS) have become a priority for major surgeries, including microvascular free tissue transfer (MVFTT) reconstruction of the head and neck. We describe an ERAS protocol with the goal to further reduce length of stay beyond national medians. Retrospective chart review between August 2016 and February 2023, including all patients who underwent MVFTT after oral cavity, skull base, salivary gland, and cutaneous ablative surgery. An ERAS protocol was implemented in March 2020. A total of 383 patients were included. Approximately 59.8% underwent oral cavity MVFTT, 34.5% cutaneous and lateral skull base, and 5.8% maxillary and anterior skull base. A total of 209 (54.7%) patients had surgery prior to implementation of the ERAS protocol and 174 (45.3%) after. Median LOS decreased from 9 days (interquartile interval [IQR] 8-11) to 6 (IQR 5-7.5, p < 0.0001) following oral cavity MVFTT. For cutaneous and lateral skull base reconstruction, median LOS decreased from 6 days (IQR 5-8) to 3 (IQR 3-7, p < 0.0001). For anterior skull base and sinonasal MVFTT, median LOS decreased from 8 (IQR 7-9) to 5 days (IQR 4.5-7, p = 0.0005). Rate of discharge to skilled nursing or subacute rehabilitation facilities decreased (24% before ERAS, 9.2% after, p < 0.0001). Thirty-day readmission rate was similar before and after implementation (10.5% vs. 10.3, p = 0.954). Discharge to facility was associated with readmission (OR 2.34, 95% CI 1.12-4.89, p = 0.024). Implementation of the ERAS protocol was associated with decreased LOS. There was no increase in rate of readmission. NA Laryngoscope, 134:4527-4534, 2024.

New-Onset Atrial Fibrillation Is a Red Flag to Microvascular Free Tissue Transfer Failure in Head and Neck Cancer Patients.

Postoperative new-onset atrial fibrillation (AF) has been shown to be associated with increased surgical morbidity and mortality following cancer ablation surgery. However, evidence of new-onset AF's impact on surgical outcomes in head and neck cancer patients undergoing tumor ablation and microvascular free tissue transfer remains scarce. This study aims to evaluate the association between AF and surgical outcomes in these patients. We enrolled head and neck cancer patients who underwent tumor ablation reconstructed with microvascular free tissue transfer from the National Health Insurance Research Database (NHIRD). Patients were grouped into the following: (1) without AF, (2) new-onset AF, and (3) preexisting AF. The groups were matched by propensity score based on age, gender, cancer stage, and comorbidities. The primary outcome was postoperative complications, whereas all-cause mortality was the secondary outcome. In total, 26,817 patients were included in this study. After matching, we identified 2,176 (79.24%) patients without AF, 285 (10.37%) with preexisting AF, and 285 (10.37%) with new-onset AF. Our results demonstrated that the free flap failure rate was twofold escalated in patients with new-onset AF (9.8%) compared to those without AF (5.4%) or preexisting AF (5.3%; p = 0.01). However, we did not identify significant differences among other postoperative complications across groups. Additionally, we found that the risk of all-cause mortality was significantly elevated in patients with preexisting AF (p < 0.001) compared to those without AF or new-onset AF. Our study demonstrated that new-onset AF is associated with an increased risk of flap failure and could serve as a predictor. On the other hand, all-cause mortality in patients with preexisting AF was significantly elevated. Close postoperative monitoring in patients with new-onset and preexisting AF is crucial to identify any potential adverse effects.

Survey-based Study to Assess the Self-perceived Competency in and Knowledge about Reconstructive Microsurgery among Young Plastic Surgeons

Objective: Microvascular free tissue transfer has become a preferred reconstructive technique for managing complex wounds and defects. The aim of this questionnaire-based study was to assess self-perceived competency in and knowledge about reconstructive microsurgery among plastic surgeons who graduated from the Faculty of Medicine Siriraj Hospital, Mahidol University during 2015-2019. Materials and Methods: Questionnaire was sent by email elicited information about the amount of microsurgery performed in practice, types of microsurgeries performed, reconstructive methods, types of flaps used, and respondent’s opinion about the microsurgery course attended during residency/fellowship training. Results: The total response rate was 87.5%. Almost all respondents work in a government hospital (90.4%), and responses came from all regions of Thailand. Thirty-eight percent of respondents reported no microsurgery cases, and the majority of those who did perform microsurgery did so less than 20 times/year. Hand reconstruction was the most common type of microsurgical procedure. The factors that negatively influence microsurgery in clinical practice include insufficiency of resources and personnel (29.1%), excessive workload (27.3%), and long operative time (23.6%). Suggestions for improvement of the microsurgical training course include having a good objective method for assessing microsurgical practices (27.7%), increasing the volume of practice on animal model (25.5%), and an appropriate number of microsurgery cases to gain necessary experience (25.5%). Conclusion: Reconstructive microsurgery was found to be a challenging procedure for many junior-level plastic surgeons. A low volume of cases limits a surgeon’s ability to develop needed skills. Important improvements in the microsurgery training course were also recommended.

Early and Late Complications of Mandibulectomy Free Flap Reconstruction: Does the Selective Use of Soft Tissue Only Flaps Reduce Complications?

This study aims to evaluate the factors most associated with early and late complications following microvascular free tissue transfer (MVFTT) after mandibulectomy. A retrospective review of patients undergoing MVFTT after segmental mandibulectomy from September 2016 to February 2021 was performed across a single academic institution. Surgical variables were collected, including the location of the resultant mandibular defect (anterior vs posterior) and flap type (osseous or non-osseous). The primary outcome variables included postoperative complications (early, <90 days; and late, >90 days) and the patients' functional status (return to oral intake). Descriptive statistics, chi-square test, Fischer's exact test, and 2-sample t tests were used to analyze differences among variables. We analyzed a cohort of 114 consecutive patients with mandibular defects, comprising 57 anterior and 57 posterior defects. Bony free flaps with hardware were used to reconstruct 98% of anterior defects compared to 58% of posterior defects (P < .001). All soft tissue only flaps did not utilize any hardware during the reconstruction. Anterior defects demonstrated more late complications requiring additional surgery (30% vs 9%, P = .04). A secondary analysis of posterior mandibular reconstructions compared soft tissue only flaps and bony free flaps with hardware and showed equivalent rates of early (12% vs 13%, P > .99) and late (9% vs 8%, P > .99) complications requiring additional surgery while demonstrating a similar return to full oral competence (55% vs 46%, P = .52) and recovery of a 100% oral diet (67% vs 54%, P = .53). Osseous free tissue transfer for segmental mandibular defects remains the gold standard in reconstruction. In our patient cohort, anterior mandibular defects are associated with greater late (>90 day) complications requiring additional surgery. Comparable outcomes may be achieved with soft tissue only versus osseous free flap reconstruction of posterior mandibular defects.

Coverage of complex pararectal pelvic defects: role of the free myocutaneous musculus vastus lateralis flap

In the event of an advanced rectal carcinoma, an evisceration with rectal amputation may become necessary. The resulting defects, due to their extent, depth, or local tissue damage from previous surgeries and radiation, can in many cases only be closed through free microvascular tissue transfer. In this case series, we demonstrate the successful combination of a musculocutaneous musculus vastus lateralis flap (MVL) with a direct connection to the superior gluteal artery. Over a 47-month period, we retrospectively examined 11 cases of patients with dorsal pelvic defects after evisceration and rectal amputation that could not be closed using local or regional means. In cases of extensive defects with deep pararectal wound cavities, all these patients underwent defect coverage through a free myocutaneous MVL flap with a direct vascular anastomosis to the superior gluteal vessels. The mean defect size was 290.0 cm² (SD: 131.2; range: 200-600 cm²). The mean defect depth was 10.5 cm, necessitating MVL flap reconstruction with an average size of 336.3 cm². Three operative revisions were required due to postoperative bleeding. There were no arterial or venous thromboses, and no flap loss occurred. Only one necrosis of a distal flap tip was observed, which could be corrected secondarily by direct suturing. The case-mix evaluation yielded an average value of 24.251 (SD: 21.699; range: 7.036-65.748) points, emphasizing the complexity of the cases. Our results indicate that a free microvascular MVL flap is a viable therapeutic option for pararectal defects that cannot be closed by local or regional methods. The superior gluteal artery proves to be a safe and sufficient vascular connection. In combination, even extensive defects can be successfully closed.

Assessment of Variability in Free Flap Color Match to Facial Skin by Donor Site and Race.

To use portable colorimetry to quantify color differences between facial skin and potential three head and neck microvascular free tissue transfer (MFTT) donor sites-radial forearm (RF), anterolateral thigh (ALT), and fibula (FF)-and compare these differences by pigmentation of the donor site skin and self-identified race. In this cross-sectional cohort study, healthy volunteers consented to handheld colorimeter measurements at the three potential MFTT donor sites (RF, ALT, FF) to quantify color match to the facial skin using the CIE color space (DeltaE). The comparison of ipsilateral to contralateral cheek served as control for measurements. Cross-sectional measurements in healthy volunteers were then compared to measurements obtained in postoperative head and neck MFTT patients. DeltaE measurements were obtained for 128 healthy controls and 24 postoperative patients (N = 152). With increasing lightness (decreased pigmentation) of the skin at the donor site, the color match significantly worsened (higher DeltaE) across all potential MFTT donor sites (all p < 0.05). DeltaE from healthy controls closely approximated postoperative color match measurements in patients who underwent cervicofacial MFTT (DeltaE RF: 5.3 vs. 6.0, p = 0.432; DeltaE ALT: 6.2 vs. 6.4, p = 0.822; DeltaE FF: 6.0 vs. 6.4, p = 0.806). Patients with decreased skin pigmentation who are undergoing head and neck MFTT may experience worse color discrepancy between cervicofacial skin and the transferred skin paddle than those with more pigmented skin. Portable colorimetry may identify patients who could benefit from interventions such as dermis-resected free tissue reconstruction with skin grafting to improve postoperative appearance. 3 Laryngoscope, 134:3581-3586, 2024.

SP57. Impact Of Post-operative Hyperglycemia On Adverse Outcomes In Microvascular Free Tissue Transfer For Breast Reconstruction

SP57. Impact Of Post-operative Hyperglycemia On Adverse Outcomes In Microvascular Free Tissue Transfer For Breast Reconstruction

The introduction of microvascular free tissue transfer in primary burn reconstruction. Experience report of the national burn center in Chile

BackgroundSurgical debridement and split thickness graft is the most common treatment for acute burn patients that require surgery. However, there is a relevant minority that will require more complex reconstructive options. Microsurgery has evolved as a valuable tool in the acute setting allowing early closure of complex wounds in order to avoid infection, maintain function and even for limb salvage in one stage reconstruction. We present our experience in the management of severely acute burned patients with free flaps, flap survival rate and complications in Chile’s National Health service. MethodWe performed a retrospective analysis of all major burn patients admitted in our unit who received a microsurgical flap in the period between april 2019 and march 2023. Data was collected on patient sex, age, mechanism of injury, total burned surface area (TBSA), location of the defect, days to reconstruction, flaps used, operatory time, flap survival and complications. ResultsIn the study period we had 925 admissions. A total of 36 patients had 42 free flaps (5,1%). All but two patients were male (95 %), mean age 46 years (range 20–––76 years). Total body surface area burned averaged 14 % (range 1–64 %). The majority of injuries were caused by high voltage electricity (59 %) and fire (33 %). 59 % compromised lower limbs and 31 % upper limbs. In 81 % of the cases anterolateral thigh flaps were used. Mean time to reconstruction was 39 days(range 1–64 days), we had 9 complications (21 %) and only one flap was lost (2,9%). DiscussionThe introduction of free flaps in the burn reconstruction field was first described in sequelae management. In the acute phase it has also proven to be safe and feasible with a surgical indication of 1,5% to 2% of the admissions in different series. In our unit, 5,1% of our admissions required it, with a low flap loss rate. The increased confidence for its use in the acutely burned setting allowed us to achieve complex coverage while maintaining surgical risk and an internationally acceptable rate of losses and complications. Free flaps cpnstitute an active approach in the classical treatment of this pathology pushing the boundaries in the local environment.

NovoSorb® biodegradable temporising matrix (BTM) in the reconstruction of cutaneous malignancies in a major cancer centre: a case series.

Non-graftable or composite defect reconstruction represents a major challenge to the reconstructive surgeon, with many wounds requiring local flap or free microvascular tissue transfer approaches. The recent advent of synthetic skin substitutes such as Biodegradable Temporizing Matrix (BTM) have revolutionized the management of complex defects including those caused by burns, trauma and infection, with low-morbidity and low-complexity surgery. However, limited data exist supporting their use in cancer reconstruction in Australia. We performed a prospective cohort study of patients undergoing cancer resection and reconstruction with BTM between February 2021 and February 2023 in our institution. Reported outcomes included matrix integration, infection, and return to theatre. Twelve patients underwent reconstruction of primary or secondary defects following cancer resection during this period. Eight patients were male, four female, mean age at surgery was 70 years. Pathology resected included squamous cell carcinoma (SCC) and melanoma of the head and neck, sarcoma resection of the lower limb, and osteoradionecrosis (ORN) of the scalp. T-stage of primary tumours ranged from T2 to T4 and one in-transit metastasis of melanoma. Four patients were treated with radiotherapy, two of whom received postoperative radiotherapy (PORT) and two who received neoadjuvant radiotherapy, three additional patients had an intervention to a previously irradiated wound bed for recurrence or ORN. Overall matrix integration was 83% (10/12), with a 50% integration rate (2/4) observed in the post-radiotherapy group, requiring return to theatre for alternative reconstructive approaches. We report our experience with a synthetic dermal matrix (BTM) in cancer reconstruction, the largest cohort of this type in the Australian literature. BTM represents an exciting reconstructive tool for the cancer reconstructive surgeon, with a high rate of success and low morbidity.

Postoperative inpatient surgical complications following head and neck microvascular free tissue transfer.

Complications following head and neck microvascular free tissue transfer (MFTT) are common. Less is known about when they occur. Retrospective study of patients with primary or recurrent head and neck cancer undergoing MFTT reconstruction at a tertiary care institution. MFTT reconstructions with inpatient postoperative complications were included. The Kruskal-Wallis test was used to compare median postoperative day (POD) onset of complication by flap type. Of 1090 patients undergoing MFTT reconstruction, 126 (11.6%) patients experienced inpatient complications including fibula (n = 35), anterolateral thigh (n = 60), or radial forearm (n = 31) MFTTs. POD onset was shortest for surgical site hematoma (median = 1 [IQR 1-5]), and longest for donor site infection (median = 11.5 [IQR 8-15]). There was no significant difference between flap types and POD onset of complications (p > 0.05). Hematoma formation and flap failure occur earliest during hospitalization, while dehiscence, infection, and fistula occur later. There is no difference in complication timing between flap types.