Anterior Neck Resurfacing Using Multiple Free Flaps in Patients With Burn Sequelae of the Anterior Neck and Chest.

BACKGROUND: It has been established that patients with burn sequelae of the anterior neck and chest have a significant degree of flap descent and deficit in neck extension when resurfaced with a single free flap. A protocol was developed to avoid flap descent in these patients by resurfacing the neck with multiple free flaps. The purpose of this article is to present our protocol for treatment and long-term results of this technique. METHODS: Twenty-five 25 patients with burn sequelae of the anterior neck and anterior thorax were retrospectively identified. Ten patients were treated with a single free flap (group 1), and 15 patients were treated with multiple free flaps (group 2). Patients were followed up for an average of 7 years after their definitive reconstructive procedure at which time measurements including flap descent from sternal notch, deficit of neck extension, and subjective reports of discomfort were obtained. RESULTS: Patients in group 1 demonstrated 8 cm (interquartile range [IQR], 1.75 cm) of flap descent, whereas patients in group 2 demonstrated 0.5 cm (IQR, 0 cm) of flap descent. Patients in group 1 demonstrated 12.5 degrees (IQR, 10 degrees) of deficit in neck extension, whereas patients in group 2 demonstrated 0 degrees (IQR, 0 degrees) of deficit in neck extension. Analysis demonstrated significantly greater descent and deficit in neck extension in group 1 compared with group 2. CONCLUSIONS: Patients with burn sequelae of the neck and anterior chest experience less flap descent and deficits in neck extension when resurfaced with multiple free flaps.

Kinematic Analysis of Smiles in the Healthy Pediatric Population Using 3-Dimensional Motion Capture.

INTRODUCTION: Facial normalcy, as measured with 2-dimensional or 3-dimensional photographs, has been documented in the healthy pediatric population. However, static images convey far from a complete representation of an individual's daily interactions with peers. Craniofacial surgery induces changes to soft or osseous tissues and thereby affects dynamic facial expression. To-date, there has not been rigorous, dynamic quantification of normal facial expression. In this study, we used 4-dimensional (4D) imaging to assess the facial expression of healthy children to provide a normative reference point for craniofacial surgeons. METHODS: A total of 36 healthy pediatric volunteers underwent 4D video recordings while performing a maximal voluntary smile. A face template containing 884 landmarks was registered and tracked throughout the videos using Dimensional Imaging software. Participants were divided into 2 smile groups: open-lip smile and closed-lip smile. Kinematic analysis of smiles was calculated for every landmark from its position in the resting frame to its terminal displacement. RESULTS: Composite smiles and Euclidean distance maps were generated displaying areas of greatest displacement near the oral commissures. There was significant difference between closed-lip and open-lip groups in regions of eyes and cheeks. In addition, the open-lip smile group demonstrated significantly greater displacement in the oral commissure on the left side compared to the right (P < .05); whereas, in the closed-lip group, the eyes and cheeks moved significantly more on the right side. CONCLUSION: This study presents an innovative method that can be used to evaluate facial expressions to help craniofacial surgeons restore functional movement in patients with facial anomalies.

Anterior Neck Resurfacing Using a Single Free Flap: Comparison of Flap Descent in Patients With Burn Sequelae of the Neck/Chest and Patients With Burn Sequelae of Only the Neck.

BACKGROUND: Burn sequelae involving the anterior neck and thorax produce a difficult challenge for reconstruction because contracture of anterior thoracic burns in addition to functional movement of the chest wall can result in downward displacement of the neck unit. The purpose of this study was to understand the influence of burn sequelae of the anterior thorax on anterior neck flap descent, function, and aesthetics. METHODS: Ten patients with burn sequelae of only the anterior neck (group 1) and 10 additional patients with burn sequelae of the anterior neck and thorax (group 2) were retrospectively identified. All 20 patients were treated with scar release and a single extended circumflex scapular free flap for neck resurfacing. Patients were followed for an average of 10 years, at which time flap descent from the sternal notch, deficit of neck extension, and subjective reports of discomfort were measured. RESULTS: Patients in group 1 experienced a median flap descent of 0 [interquartile range (IQR), 1.62 cm] and a median deficit of 0° (IQR, 5°) during neck extension. Patients in group 2 experienced a median flap descent of 8 cm (IQR, 1.75 cm) and a median deficit of 12.5° (IQR, 10°) during neck extension. Retrospective analysis of the 10 patients with burn sequelae of the anterior neck and thorax (group 2) demonstrated a significantly greater degree of flap descent and deficit of neck extension compared with the 10 patients with burn sequelae of only the anterior neck (group 1). Patients in group 1 also subjectively reported less discomfort at follow-up compared with patients in group 2. CONCLUSIONS: We conclude that patients with burn sequelae involving the anterior neck and thorax have a significantly greater degree of flap descent and neck extension compared with patients with burn sequelae involving only the anterior neck. Flaps of a larger surface area or use of multiple flaps for neck resurfacing may be considered to avoid significant flap descent associated with burn sequelae involving both the anterior neck and thorax.

Relational Anatomy of the Mimetic Muscles and Its Implications on Free Functional Muscle Inset in Facial Reanimation.

BACKGROUND: The human smile is a complex coordinated activity of mimetic muscles predominantly recognizable by a superolateral pull at the commissure and elevation of the upper lip. The aim of this study was to revisit the muscles of facial expression responsible for these motions, evaluate their relational anatomy and orientation, and relate this to optimal positioning of free muscle transfer in smile reanimation. METHODS: Nineteen hemifaces from fresh cadaveric specimens were dissected. A subsuperficial muscular aponeurotic system skin flap was elevated to expose the zygomaticus major, zygomaticus minor, levator labii superioris, and levator labii superioris alaeque nasi. Muscle location, length, width, angle of pull, and any anatomic variation were noted. RESULTS: All specimens had zygomaticus major, levator labii superioris, and levator labii superioris alaeque nasi muscles present bilaterally. Conversely, the zygomaticus minor was present in only 10 of 19 hemifaces. There was no significant difference in muscle length, width, or line of pull between specimen sides. Of all the assessed muscles, the zygomaticus minor had the most transverse line of pull, at 31.6°; the zygomaticus major was more oblique with a line of pull of 55.5°; and the levator labii superioris and levator labii superioris alaeque nasi were oriented almost vertically with angles of 74.7° and 79.0°, respectively. CONCLUSIONS: The mimetic muscle vector is quite vertical in comparison to the angle obtained by traditional dynamic smile reconstruction surgeries. A more vertical vector, especially at the upper lip, should be considered in smile reconstruction.

A Pilot Needs Assessment Addressing Gender-Based Microaggressions in Surgical Trainees.

BACKGROUND: Microaggressions result in the unintentional discrimination of marginalized groups. Female trainees are underrepresented in all levels of surgical training, thus, microaggressions are a salient topic for surgical education. This study aims to explore the perceived effect of gender-based microaggressions on surgical trainees. METHODS: After IRB approval, an anonymous Likert-scaled survey on perceptions of microaggressions was distributed to interns at our institution prior to starting surgical residency and one year after. Data was de-identified and analyzed using Likert analysis and Mann-Whitney U testing. Follow-up focus groups were lead and transcriptions analyzed using detailed thematic analysis. RESULTS: Sixty-nine of 104 interns (66%) responded to the initial survey, 34 (49%) were female. Nineteen of 38 interns (50%) responded to the follow-up survey, 10 (53%) were female. Compared to male repondents, females were significantly more likely to believe they were likely to experience microaggressions (median = 5, IQR 4-5 vs median = 4, IQR 3-4, p < 0.0001) and that microaggressions would impact their mental health (median = 4, IQR 4-4 vs median = 3, IQR 2-4, p < 0.0002). One-year follow-up data similarly revealed that, compared to male respondents, females were significantly more likely to have experienced microaggressions on a frequent basis throughout intern year (median = 3, IQR 3-3.75 vs median = 1.5, IQR 1-3, p < 0.05) and to have subjectively felt the impact of microaggressions on their mental health (median = 3, IQR 2.25-4 vs median = 1.5, IQR 1-2.25, p < 0.05). A focus group of female surgical trainees demonstrated patterns consistent with previously validated themes on gender-based microaggressions, including environmental invalidations, being treated as a second class citizen, and assumption of inferiority, at all levels of training. CONCLUSIONS: New trainees experience anxiety and lack preparedness when confronted with the threat of microaggressions. Our study reveals that female surgical interns are more likely than males to worry about microaggressions and to experience microaggressions and their negative effects. Focus group data exposes the wide-ranging impact of microaggressions experienced by female trainees of all levels. Thus, there should be benefit from instituting formal microaggression training prior to starting surgical residency.

Epidemiology and Outcomes of Cooking- and Cookstove-Related Burn Injuries: A World Health Organization Global Burn Registry Report.

Cooking- and cookstove-related burns (CSBs) comprise a large proportion of burn injuries globally, but there are limited data on cooking behavior patterns to inform prevention and advocacy. Therefore, we aimed to describe the epidemiology, risk factors, and outcomes of these injuries and highlight the potential of the World Health Organization (WHO) Global Burn Registry (GBR). Patients with cooking-related burns were identified in the WHO GBR. Patient demographics, cooking arrangement, injury characteristics, and outcomes were described and compared. Bivariate regression was performed to identify risk factors associated with CSBs. Analysis demonstrated that 25% of patients in the GBR sustained cooking-related burns (n = 1723). The cooking environment and cooking fuels used varied significantly by country income level ([electricity use: LIC 1.6 vs MIC 5.9 vs HIC 49.6%; P < .001] [kerosene use: LIC 5.7 vs MIC 10.4 vs HIC 0.0%; P < .001]). Of cooking-related burns, 22% were cookstove-related burns (CSBs; 311 burns). Patients with CSBs were more often female (65% vs 53%; P < .001). CSBs were significantly larger in TBSA size (30%, IQR 15-45 vs 15%, IQR 10-25; P < .001), had higher revised Baux scores (70, IQR 46-95 vs 28, IQR 10-25; P < .001) and more often resulted in death (41 vs 11%; P < .001) than other cooking burns. Patients with CSBs were more likely to be burned by fires (OR 4.74; 95% CI 2.99-7.54) and explosions (OR 2.91, 95% CI 2.03-4.18) than other cooking injuries. Kerosene had the highest odds of CSB compared to other cooking fuels (OR 2.37, 95% CI 1.52-3.69). In conclusion, CSBs specifically have different epidemiology than cooking-related burns. CSBs were more likely caused by structural factors (eg, explosion, fire) than behavioral factors (eg, accidental movements) when compared to other cooking burns. These differences suggest prevention interventions for CSBs may require distinctive efforts than typically deployed for cooking-related injuries, and necessarily involve cookstove design and safety regulations to prevent fires and explosions.

Orbicularis Oculi Muscle Reinnervation Confers Corneal Protective Advantages over Static Interventions Alone in the Subacute Facial Palsy Patient.

BACKGROUND: Corneal protection is a priority in flaccid facial palsy patients. Denervation of the orbicularis oculi muscle results in weak palpebral closure and predisposes patients to severe corneal sequelae. While periorbital static procedures enhance corneal coverage in repose, voluntary closure is only regained through dynamic reinnervation of the muscle. This study aims to elucidate the added effect of dynamic reinnervation of the orbicularis oculi muscle on long-term corneal integrity as well as on dynamic closure of the palpebral aperture. METHODS: Retrospective review was performed on two groups of complete palsy patients: those who received solely periorbital static procedures and those who underwent concomitant orbicularis oculi muscle reinnervation and static lid procedures. Only patients with complete ophthalmic examinations were included. Corneal punctate epithelial erosions in addition to static and dynamic palpebral measurements were serially assessed preoperatively and postoperatively. RESULTS: Of 272 facial palsy patients, 26 fit the inclusion criteria. Eleven patients underwent combined muscle reinnervation involving facial-to-masseteric nerve coaptation in addition to static eye procedures, and 15 patients underwent solely static interventions. Analysis revealed a 65.3 percent lower mean punctate epithelial erosion score in reinnervation patients as compared with static patients when evaluated at more than 9 months postoperatively (p < 0.01). Reinnervation patients were also found to have 25.3 percent greater palpebral aperture closure (p < 0.05) and 32.8 percent higher closure velocity (p < 0.01) compared with static patients. CONCLUSION: In patients with subacute facial palsy, dynamic reanimation of the orbicularis oculi muscle with concomitant static interventions provides lasting corneal protection not seen in patients who receive solely static interventions. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Reuse of the Masseteric Nerve for Dynamic Reanimation in Facial Palsy Patients with Previously Failed One-Stage Dynamic Smile Reanimation.

Failed primary dynamic smile reanimation procedures present significant challenges for the patient and surgeon alike. This is particularly true in older patients with a history of previous neck dissection and radiation therapy who underwent previous reconstruction with a free functional muscle transfer innervated with an ipsilateral masseter nerve. The objective of this study was to demonstrate feasibility, describe surgical technique, and assess results of reusing the masseter nerve to reinnervate a new free functional muscle transfer. Patients presenting between 2007 and 2017 to a single center after previously failed dynamic smile reanimation using the masseteric nerve who underwent a salvage dynamic procedure involving reuse of the masseteric nerve were analyzed for demographics, history of radiation therapy or chemotherapy, surgical techniques, and objective measurements using the MEEI Facegram software. The average age was 50 years, the average duration of palsy was 6.2 years, and the average preoperative House-Brackmann score was 6. Causes of palsy included Bell palsy in one, parotid malignancies in two, and a seventh cranial nerve schwannoma in one patient, with two patients requiring radiation therapy preoperatively. Three patients failed to achieve any motion after the first reanimation, and the fourth patient initially achieved excursion; however, because of cancer recurrence and resection of free functional muscle transfer, motion was subsequently lost. Average smile excursion after salvage was 11.32 mm and philtral deviation correction was 1.3 mm. Reusing the masseter nerve for dynamic smile restoration with free functional muscle transfer in previously failed reanimation patients is feasible and may provide successful reanimation. Careful patient evaluation and clear understanding of previous procedures are essential for success. CLINICAL QUESTION/LEVEL OF EVIDENCE:: Therapeutic, IV.