Salvage surgery of recurrence after laryngectomy--when should the alt free flap be modified?

modified tubed anterolateral free flap for reconstruction of total laryngopharyngectomy

Background: A tubed anterolateral thigh (ALT) flap has become a reliable option for laryngopharyngeal defects; however, successful reconstruction remains challenging. Prevention of fistulae, resurfacing of the neck and flap monitoring are key issues that surgeons have sought to address through various flap modifications. Here we describe a chimeric design of the tubed ALT flap which tackles these and other challenges. Methods: Fourteen cases requiring ALT flaps were harvested for reconstruction of total laryngopharyngectomy defects between 2017 and 2019. Each flap was raised on at least two perforators of the descending branch of the lateral circumflex femoral artery (dbLCFA) or both the dbLCFA and transverse branch of the lateral circumflex femoral artery (tbLCFA) to create a chimeric flap. The primary cutaneous paddle was tubed to reconstruct the oesophagus, and the secondary component was inset to the neck as a skin-monitoring paddle. A strip of vascularised vastus lateralis was harvested in the primary paddle continuing with the flap and sutured along the neopharynx suture line, an additional layer preventing anastomotic leak. Results: Patients averaged 61.1 years of age. An average of 2.4 perforators were included per flap. All flaps survived. Donor sites were closed primarily in all cases. Barium swallow was performed in 71.4 per cent of cases (10/14). Fistula occurred in 7.1 per cent of patients (1/14). Patients were followed up for an average of 13 months. Conclusion: Our chimeric ALT free flap design provides a reliable pharyngeal reconstruction, and allows for flap monitoring and neck resurfacing when required, with a low rate of clinically significant leaks or fistula.

Coverage of anterior mediastinal tracheostomy with bipedicled anterolateral thigh flap

Background

Cancer defects requiring anterior mediastinal tracheostomy (AMT) are complex, often accompanied by tracheo-laryngeal and pharyngeal defects with exposure of the great vessels and mediastinal cavity. The trachea has to be mobilised and exteriorised as an end-tracheostome through the anterior chest. A well-vascularised flap that can resurface skin defects, obliterate dead space and allow maturation of a reliable anterior mediastinal tracheostome is required. We describe a modification of using a centrally fenestrated bipedicled chimeric anterolateral thigh flap (ALT) to address these challenges.

Methods

A free chimeric bipedicled ALT flap was designed. The skin defect was resurfaced by a vertically-oriented skin paddle. Two chimeric muscle components were used to partition the mediastinum and the great vessels of the neck from the tracheostome. The mediastinal trachea was mobilised and matured through a centrally-fenestrated opening in the flap. Layered fascial sutures were employed to minimize dehiscence.

Results/Complications

Two patients with AMT underwent the modified ALT. No major complications such as flap-tracheostomy dehiscence occurred. One patient had a small peripheral demarcation of the flap which required revision and secondary closure.

Conclusion

The bipedicled design of the modified ALT flap provided robust blood supply to the central fenestration through dual perforators, avoiding flap-tracheostomy separation. The chimeric muscle components obliterate dead space and protect the great vessels of the neck and mediastinum. The thin pliable nature of the anterolateral thigh skin also allowed for tensionless inset of the trachea.

Analysis of the NSQIP Database in 676 Patients Undergoing Laryngopharyngectomy

Objective

Assess impact of reconstructive procedures on patients undergoing laryngopharyngectomy and to determine whether 30-day postoperative morbidity and mortality varied between patients who underwent flap reconstruction and those who did not.

Study Design

Retrospective analysis of the prospectively collected American College of Surgeons National Surgical Quality Improvement (ACS-NSQIP) database.

Setting

Tertiary medical center.

Subjects and Methods

We reviewed the 2005-2011 ACS-NSQIP database to identify patients undergoing laryngectomy and/or pharyngectomy. Bivariate analysis was done to compare preoperative variables and postoperative outcomes between the flap reconstruction group and non-reconstruction group. Chi-square tests were used for categorical variables and t-tests for continuous variables. Logistic regression analysis was performed to calculate odds ratio to account for potential confounders. To create a valid logistic analysis model, F-test was used to determine whether certain variables should be included in the model.

Results

Six hundred seventy-six patients were included in our study; 213 patients received concurrent flap reconstruction whereas 463 did not. After risk adjustment, analyses revealed no statistically significant difference in wound complication, minor morbidity, and mortality between the 2 groups. The flap reconstruction cohort showed significantly longer operative times (8.09 ± 3.36 hours vs 5.63 ± 3.47 hours; P = .001) and higher major morbidity rate (OR = 5.906, 95% CI, 3.131-11.139, P = .001).

Conclusions

This is the first comprehensive analysis of flap reconstruction for laryngopharyngeal defects using the ACS-NSQIP registry. Additional measures involved in flap reconstruction are associated with an increase in major morbidity but not mortality. An understanding of these variables may optimize the decision-making process for patients undergoing laryngectomy and/or pharyngectomy.