RESUMO
BACKGROUND: Microsurgery is a foundational plastic surgery principle. However, public unawareness of microsurgery and its associated rigorous training in the United States may contribute to current misconceptions and undervaluing of plastic and reconstructive surgeons. This study aims to characterize public knowledge of microsurgery. METHODS: A cross-sectional survey was conducted from August to September 2021 using Amazon Mechanical Turk to assess baseline public knowledge of microsurgery. A multivariable logistic regression model was constructed to evaluate the association between baseline knowledge and demographic characteristics. Significance was set to a p < 0.05. RESULTS: A total of 516 responses were analyzed. The mean age was 36.7 years (standard deviation, 16.04 years; white, 84%; non-Hispanic, 70%). Of those surveyed, 52% agreed that general surgeons perform microsurgery, while only 28% agreed that plastic and reconstructive surgeons perform microsurgery. When asked if head and neck reconstruction, breast reconstruction, and finger replantation required microsurgery, only 28, 41, and 41% of respondents agreed, respectively. When controlled for sociodemographic factors, Hispanics had significantly more odds to mistake that head and neck reconstruction did not require microsurgery (odds ratio [OR] 95% CI 0.49; 0.30-0.80; p = 0.004) and less odds to consider plastic and reconstructive surgeons for reconstruction (OR 0.51; 95% CI 0.32-0.84; p = 0.008). Females had 1.63 more odds of considering plastic and reconstructive surgeons for reconstruction (95% CI 1.09-2.43; p = 0.017). Low-educated participants had significantly more odds to consider general surgeons as those who performed reconstructive microsurgery (OR 8.70; 95% CI 1.09-69.40; p = 0.041). CONCLUSION: Misconceptions of microsurgery as a foundational principle of plastic surgery persist and correlate with undervaluing the specialty. Knowledge differs by ethnicity, level of education, and gender. Therefore, patient counseling should use culturally appropriate elements to demystify microsurgery, build value, and better inform risks and benefits.
Assuntos
Procedimentos de Cirurgia Plástica , Cirurgia Plástica , Feminino , Humanos , Estados Unidos , Adulto , Microcirurgia/educação , Estudos Transversais , Cirurgia Plástica/educação , Inquéritos e QuestionáriosRESUMO
INTRODUCTION: Clefts of the lip and palate are leading congenital facial anomalies. Underserved patients with these facial differences lack access to medical care, surgical expertise, prenatal care, or psychological support. Moreover, the disease results in significant economic strains on patients and their families. While surgical outreach programs have attempted to fill this void, significant challenges facing international comprehensive cleft care persist. OBJECTIVE: Propose a path toward international sustainable cleft care based on the Global Smile Foundation experience. RESULTS: International sustainable comprehensive cleft care can be achieved by regulating surgical outreach programs. Regulation of these missions would ensure standardized care and encourage stakeholders to cooperate and adequately allocate funding and resources. Capacity building can be achieved through "diagonal" cleft care delivery models, multidisciplinary workshops, fellowship programs, research and quality assurance, as well as leveraging emerging technologies such as Augmented Reality. CONCLUSION: International comprehensive cleft care requires continuous collaborative efforts between visiting and local teams as well as international and national organizations. Standardizing and regulating current practices as well as promoting capacity building initiatives can contribute to sustainable cleft care.
Assuntos
Fenda Labial , Fissura Palatina , Fenda Labial/cirurgia , Fissura Palatina/cirurgia , HumanosRESUMO
In reconstructive surgery, tissues are routinely transferred to repair a defect caused by trauma, cancer, chronic diseases, or congenital malformations; surgical transfer intrinsically impairs metabolic supply to tissues placing a risk of ischemia-related complications such as necrosis, impaired healing, or infection. Pre-surgical induction of angiogenesis in tissues (preconditioning) can limit postsurgical ischemic complications and improve outcomes, but very few preconditioning strategies have successfully been translated to clinical practice due to the invasiveness of most proposed approaches, their suboptimal effects, and their challenging regulatory approval. We optimized a method that adopts noninvasive external suction to precondition tissues through the induction of hypoxia-mediated angiogenesis. Using a sequential approach in a rodent model, we determined the parameters of application (frequency, suction levels, duration, and interfaces) that fine-tune the balance of enhanced angiogenesis, attenuation of hypoxic tissue damage, and length of treatment. The optimized repeated short-intermittent applications of intermediate suction induced a 1.7-fold increase in tissue vascular density after only 5 days of treatment (p < 0.05); foam interfaces showed the same effectiveness and caused less complications. In a second separate experiment, our model showed that the optimized technique significantly improves survival of transferred tissues. Here we demonstrate that noninvasive external suction can successfully, safely, and promptly enhance vascularity of soft tissues: these translational principles can help design effective preconditioning strategies, transform best clinical practice in surgery, and improve patient outcomes.
Assuntos
Tecido Adiposo , Neovascularização Fisiológica , Procedimentos de Cirurgia Plástica , Tecido Adiposo/irrigação sanguínea , Tecido Adiposo/transplante , Animais , Feminino , Humanos , Hipóxia/metabolismo , Camundongos , Camundongos Endogâmicos NOD , Camundongos SCID , SucçãoRESUMO
OBJECTIVE OF THE STUDY: To assess the prevalence of cortical bone invasion (CBI) with secondary extramedullary hematopoiesis (EMH) in patients with non-transfusion-dependent thalassemia (NTDT), to determine its predilection sites on thoracic and abdominal imaging, to determine whether there is an association between various clinical and hematological parameters, and to evaluate its various findings mainly on magnetic resonance imaging (MRI), in addition to computed tomography (CT) scans. MATERIALS AND METHODS: This is a retrospective cohort study of 57 patients with NTDT imaged by CT or MRI. Both clinical and laboratory data were gathered. An imaging scoring system was used to describe the appearance of CBI by MRI. RESULTS: Twenty-seven patients (47.4 %) were found to have CBI and EMH with the most common location being the thoracic spine. Splenectomy and lower hemoglobin level were found to be independent risk factors for its development. Most lesions were homogenous (70 %), had predominant red marrow signal (67 %), and well-defined margins (89 %). CONCLUSION: CBI and secondary tumefactive EMH are common findings in patients with NTDT, with distinct imaging and clinical characteristics. An increased risk was seen in patients with splenectomy and lower hemoglobin. The imaging scoring system described is helpful in diagnosing and describing this entity, hence precluding unnecessary biopsies.
Assuntos
Osso Cortical/diagnóstico por imagem , Osso Cortical/patologia , Hematopoese Extramedular , Talassemia/complicações , Adolescente , Adulto , Criança , Meios de Contraste , Feminino , Humanos , Iohexol , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Tomografia Computadorizada por Raios XRESUMO
Thalassemia continues to be a major health burden. The chronicity of the disease and the high cost of life-long treatment make prevention strategies crucial in the management of this disease. In this article, we revisit different successful prevention strategies, and underline the Lebanese model. The Chronic Care Center (CCC), Beirut, is the only specialized center in Lebanon for the treatment and prevention of thalassemia. The current number of patients registered up to August 2013 was 724, representing cases from all over Lebanon. In 1994, the center launched a national prevention program following the World Health Organization (WHO) recommendations. The major activities of the program include awareness campaigns, screening for thalassemia carriers in the general population and high risk groups, registry of new cases and follow-up on the mandatory premarital law (established at the same time). Screening programs showed a carrier rate of around 2.3% in the general population, and 4.0-41.0% in high risk groups. The major pitfall in the law is that only persons with a mean corpuscular volume (MCV) of >70.0 fL are asked to perform further hemoglobin (Hb) testing. A significant decrease in the number of new cases of thalassemia patients in Lebanon reflects the efforts deployed in the prevention of the disease. However, some limitations are faced in reaching a complete eradication of the disease, mainly due to the fact that abortion is illegal and due to pitfalls and incorrect implementation of the premarital law.
Assuntos
Promoção da Saúde , Talassemia/prevenção & controle , Informação de Saúde ao Consumidor , Países em Desenvolvimento , Triagem de Portadores Genéticos , Aconselhamento Genético , Testes Genéticos/legislação & jurisprudência , Promoção da Saúde/legislação & jurisprudência , Humanos , Incidência , Líbano/epidemiologia , Mutação , Exames Pré-Nupciais , Sistema de Registros , Talassemia/epidemiologia , Talassemia/genética , Talassemia/terapiaRESUMO
The increase in survival rate of ß-thalassemia (ß-thal) patients allowed for the appearance and manifestation of several complications in almost every organ system. Priapism in ß-thal patients is rarely reported in the literature. We herein report and investigate the occurrence of two cases of priapism in two young patients with ß-thal intermedia (ß-TI). The potential mechanisms are due to either a cellular mechanism involving a thrombus obstructing the efferent venules of the corpora cavernosa leading to priapism, or a recently elucidated functional mechanism that causes alteration of nitric oxide (NO) response of the penis, ultimately causing priapism. This should incite clinicians for a close follow-up and monitoring of high risk patients who are susceptible to developing priapism.
Assuntos
Priapismo/etiologia , Talassemia beta/fisiopatologia , Antagonistas Adrenérgicos beta/uso terapêutico , Adulto , Terapia Combinada , Combinação de Medicamentos , Antagonistas dos Receptores Histamínicos H1/uso terapêutico , Humanos , Masculino , Priapismo/prevenção & controle , Propranolol/uso terapêutico , Pseudoefedrina/uso terapêutico , Índice de Gravidade de Doença , Resultado do Tratamento , Triprolidina/uso terapêutico , Talassemia beta/tratamento farmacológico , Talassemia beta/terapiaRESUMO
Beta-thalassemia is due to a defect in the synthesis of the beta-globin chains, leading to alpha/beta imbalance, ineffective erythropoiesis, and chronic anemia. The spectrum of thalassemias is wide, with one end comprising thalassemia minor, which consists of a mild hypochromic microcytic anemia with no obvious clinical manifestations, while on the other end is thalassemia major, characterized by patients who present in their first years of life with profound anemia and regular transfusion requirements for survival. Along the spectrum lies thalassemia intermedia, a term developed to describe patients with manifestations that are neither mild enough nor severe enough to be classified in the spectrum's extremes. Over the past decade, our understanding of ß-thalassemia intermedia has increased tremendously with regards to molecular information as well as pathophysiology. It is now clear that ß-thalassemia intermedia has a clinical presentation as well as complications associated with the disease that are different from those of ß-thalassemia major. This review is designed to tackle issues related to ß-thalassemia intermedia from the basic definition of the disease to paramedical issues, namely the quality of life in these patients. Genetics and pathophysiology are revisited, as well as the complications specific to this disease. These complications include effects on several organ systems, including the cardiovascular, hepatic, endocrine, renal, brain, and skeletal systems. Extramedullary hematopoiesis is also discussed in this article. Risk factors are highlighted and cutoffs are identified to minimize morbidities in ß-thalassemia intermedia. Several treatment modalities are considered by shining a light on the pros and cons of each modality, as well as the role of special pharmacological agents in the progress of the disease and its morbidities. Finally, health-related quality of life is discussed in these patients with a direct comparison to the more severe ß-thalassemia major.
RESUMO
OBJECTIVE: To examine how the recent sharp rise in telemedicine has impacted trends in accessibility of breast reconstruction (BR). PATIENTS AND METHODS: A retrospective study reviewed patients who underwent a total mastectomy at our institution from 1 August 2016 to 31 January 2022. By comparing cohorts before and during the widespread implementation of telemedicine, we assessed telehealth's impact on healthcare accessibility, measured by distance from patients' residences to our institution. RESULTS: A total of 359 patients were included in this study. Of those, 176 received total mastectomy prior to the availability of telemedicine, and 183 in the subsequent period. There were similar baseline characteristics among patients undergoing mastectomy, including distance from place of residence to hospital (p = 0.67). The same proportion elected to receive BR between groups (p = 0.22). Those declining BR traveled similar distances as those electing the procedure, both before the era of widespread telemedicine adoption (40.3 and 35.6 miles, p = 0.56) and during the height of telemedicine use (22.3 and 61.3 miles, p = 0.26). When tracking follow-up care, significantly more patients during the pandemic pursued at least one follow-up visit with their original surgical team, indicative of the increased utilization of telehealth services. CONCLUSIONS: While the rate of BR remained unchanged during the pandemic, our findings reveal significant shifts in healthcare utilization, highly attributed to the surge in telehealth adoption. This suggests a transformative impact on breast cancer care, emphasizing the need for continued exploration of telemedicine's role in enhancing accessibility and patient follow-up in the post-pandemic era.
RESUMO
BACKGROUND: There exists an increasing array of treatments proposed to prevent, alleviate, and abort symptoms of a migraine; however, for patients who undergo reconstructive microsurgery, caution must be taken to preserve vascular integrity. This study is the first-to-date scoping review of vascular and bleeding risk of current migraine therapies, with the purpose of identifying potential therapeutic agents for postoperative migraine management appropriate for microsurgical patients. METHODS: Currently available migraine therapeutics were compiled from UpToDate and the American Academy of Family Physicians. A PubMed literature review was performed for each therapeutic's effect on bleeding or vascular involvement. Data were compiled into tables of abortive, symptom-controlling and prophylactic, and non-pharmacologic treatments. Expert microsurgeons reviewed the data to provide recommendations for optimized patient care. RESULTS: Triptans and other ergot derivatives demonstrated strong evidence of vasoconstriction and were greatly advised against for immediate post-microsurgical use. Novel pharmaceutical therapies like Lasmiditan and CGRP antagonists have no literature indicating potential for vasoconstriction or hematoma and remain an investigational option for abortive medical treatment. For symptom control, acetaminophen appears the safest option, with clinical judgment and further research needed for use of NSAIDs. Alternative treatment techniques may include migraine prophylaxis with botulinum toxin injection or nutraceutical treatment via magnesium supplementation or Coenzyme Q10 administration, minimizing the need for additional medication in the postoperative setting. CONCLUSIONS: Patients undergoing reconstructive microsurgery have a unique medical profile limiting the therapeutic options available to treat migraines. This review provides preliminary evidence to be considered as a guide for prescribing therapeutics for migraine in the postoperative setting.
RESUMO
Little is known about the levels of health literacy (HL) among plastic and reconstructive surgery (PRS) patients compared with the general population. This study aimed to characterize HL levels in patients interested in plastic surgery and identify potential risk factors associated with inadequate levels of HL among this population. Methods: Amazon's Mechanical Turk was used to distribute a survey. The Chew's Brief Health Literacy Screener was used to evaluate the level of HL. The cohort was divided into two groups: non-PRS and PRS groups. Four subgroups were created: cosmetic, noncosmetic, reconstructive, and nonreconstructive groups. A multivariable logistic regression model was constructed to assess associations between levels of HL and sociodemographic characteristics. Results: A total of 510 responses were analyzed in this study. Of those, 34% of participants belong to the PRS group and 66% to the non-PRS group. Inadequate levels of HL were evidenced in 52% and 50% of the participants in the non-PRS and PRS groups, respectively (P = 0.780). No difference in HL levels was found in the noncosmetic versus cosmetic groups (P = 0.783). A statistically significant difference in HL levels was evidenced between nonreconstructive versus reconstructive groups after holding other sociodemographic factors constant (0.29, OR; 95% CI, 0.15-0.58; P < 0.001). Conclusions: Inadequate levels of HL were present in almost half of the cohort, which highlights the importance of adequately assessing HL levels in all patients. It is of utmost importance to evaluate HL in clinical practice using evidence-based criteria to better inform and educate patients interested in plastic surgery.
RESUMO
Abdominal wall tissue expansion is a unique technique that seeks to augment and expand both the fascial and subcutaneous tissues/skin layers to achieve durable closure of otherwise challenging ventral hernias. In addition to allowing primary fascial closure in a majority of cases, this technique enables reduced tension on the closure, potentially decreasing the recurrence rate. This article describes the senior author's surgical technique for abdominal wall tissue expansion in massive complicated ventral hernias. The plastic surgeon is at a unique advantage to assist with the repair of massive complicated ventral hernias given their comfort with complex tissue handling and expandable devices. This specialized technique thus provides an opportunity for plastic surgeons to serve as expert co-surgeons with general surgery colleagues to help achieve superior outcomes in patients with these challenging hernias.
RESUMO
PURPOSE: Despite promising advances in breast cancer immunotherapy, augmenting T-cell infiltration has remained a significant challenge. Although neither individual vaccines nor immune checkpoint blockade (ICB) have had broad success as monotherapies, we hypothesized that targeted vaccination against an oncogenic driver in combination with ICB could direct and enable antitumor immunity in advanced cancers. EXPERIMENTAL DESIGN: Our models of HER2+ breast cancer exhibit molecular signatures that are reflective of advanced human HER2+ breast cancer, with a small numbers of neoepitopes and elevated immunosuppressive markers. Using these, we vaccinated against the oncogenic HER2Δ16 isoform, a nondriver tumor-associated gene (GFP), and specific neoepitopes. We further tested the effect of vaccination or anti-PD-1, alone and in combination. RESULTS: We found that only vaccination targeting HER2Δ16, a driver of oncogenicity and HER2-therapeutic resistance, could elicit significant antitumor responses, while vaccines targeting a nondriver tumor-specific antigen or tumor neoepitopes did not. Vaccine-induced HER2-specific CD8+ T cells were essential for responses, which were more effective early in tumor development. Long-term tumor control of advanced cancers occurred only when HER2Δ16 vaccination was combined with αPD-1. Single-cell RNA sequencing of tumor-infiltrating T cells revealed that while vaccination expanded CD8 T cells, only the combination of vaccine with αPD-1 induced functional gene expression signatures in those CD8 T cells. Furthermore, we show that expanded clones are HER2-reactive, conclusively demonstrating the efficacy of this vaccination strategy in targeting HER2. CONCLUSIONS: Combining oncogenic driver targeted vaccines with selective ICB offers a rational paradigm for precision immunotherapy, which we are clinically evaluating in a phase II trial (NCT03632941).
Assuntos
Neoplasias da Mama/terapia , Vacinas Anticâncer/administração & dosagem , Inibidores de Checkpoint Imunológico/administração & dosagem , Neoplasias Mamárias Experimentais/terapia , Receptor ErbB-2/imunologia , Animais , Antígenos de Neoplasias/genética , Antígenos de Neoplasias/imunologia , Antígenos de Neoplasias/metabolismo , Neoplasias da Mama/genética , Neoplasias da Mama/imunologia , Neoplasias da Mama/patologia , Linfócitos T CD8-Positivos/efeitos dos fármacos , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/metabolismo , Linhagem Celular Tumoral , Feminino , Humanos , Imunoterapia/métodos , Linfócitos do Interstício Tumoral/efeitos dos fármacos , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/metabolismo , Neoplasias Mamárias Experimentais/genética , Neoplasias Mamárias Experimentais/imunologia , Neoplasias Mamárias Experimentais/patologia , Camundongos , Camundongos Transgênicos , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Receptor ErbB-2/genética , Receptor ErbB-2/metabolismo , Vacinas Combinadas/administração & dosagemRESUMO
IMPACT STATEMENT: Trauma, disease, surgery, or congentital defects can cause soft tissue losses in patients, leading to disfigurement, functional impairment, and a low quality of life. In the lack of available effective methods to reconstruct these defects, acellular adipose matrices could provide a novel therapeutic solution to such challenge.
Assuntos
Tecido Adiposo/química , Matriz Extracelular , Alicerces Teciduais/química , Animais , Matriz Extracelular/química , Matriz Extracelular/transplante , Feminino , Humanos , Camundongos , Transplante HomólogoRESUMO
BACKGROUND: Advances in reconstructive surgery are leading to an increased number of flaps at risk for ischemic necrosis, because of either intrinsic (e.g., larger flap size) or extrinsic (e.g., diabetes) factors. Methods to preoperatively improve flap vascularity and limit postoperative ischemia are lacking. Noninvasive suction, using either a macrodeformational silicone cup interface (external volume expansion) or a microdeformational polyurethane foam interface (foam-mediated external volume expansion), has been shown to induce angiogenesis in tissues. The authors investigated whether the preoperative use of external volume expansion/foam-mediated external volume expansion improves flap survival in an obesity-induced diabetic animal model. METHODS: Db/Db mice underwent either mechanical stimulation with suction for 5 days using either external volume expansion or foam-mediated external volume expansion, or received no stimulation (n = 8 per group). Five days after the last stimulation, a critical-size, axial-pattern, fasciocutaneous flap was raised in all animals. Postoperatively, flap survival was monitored with digital imaging for 10 days. After this period, flaps were harvested to assess tissue survival, angiogenesis, and inflammation, using histology and polymerase chain reaction. RESULTS: Foam-mediated external volume expansion preconditioning significantly increased the viable flap area (28 percent), viable flap volume (27 percent), and flap capillary density (36 percent) in comparison to controls; vascular endothelial growth factor was also up-regulated (>300 percent). In contrast, external volume expansion resulted in a severe inflammatory response and increased flap necrosis. CONCLUSIONS: Foam-mediated external volume expansion improves flap survival in obese diabetic mice. This procedure may allow for improved clinical rates of flap survival in high-risk patients.
Assuntos
Sobrevivência de Enxerto/fisiologia , Precondicionamento Isquêmico/métodos , Retalhos Cirúrgicos/patologia , Animais , Diabetes Mellitus Experimental/fisiopatologia , Diabetes Mellitus Tipo 2/fisiopatologia , Modelos Animais de Doenças , Feminino , Inflamação/etiologia , Camundongos Endogâmicos , Camundongos Obesos , Necrose/prevenção & controle , Período Pós-Operatório , Sucção , Retalhos Cirúrgicos/irrigação sanguínea , Expansão de Tecido/métodos , Remodelação Vascular/fisiologiaRESUMO
Advancements in surgical wound treatment have led to skin substitutes and bioscaffolds as temporary and permanent coverage for burn wounds. Skin substitutes are used to improve wound coverage and restore the functional and aesthetic qualities of skin, and help to prevent wound infection and maintain a moist wound healing environment. Although allografts are preferred when autografts are not possible, high costs and limited availability have led to the use of xenografts and the development of skin substitutes and bioscaffolds. Despite constant evolution in the development of these skin substitutes and bioscaffolds, no single product stands out as the gold standard.
Assuntos
Queimaduras/cirurgia , Transplante de Pele , Pele Artificial , Alicerces Teciduais , Humanos , Transplante Autólogo , Transplante Homólogo , CicatrizaçãoRESUMO
INTRODUCTION: Hyaluronic acid (HA)-based fillers are used for various cosmetic procedures. However, due to filler migration and degradation, reinjections of the fillers are often required. Methacrylated HA (MA-HA) can be made into injectable shape-memorizing fillers (three-dimensional [3D] MA-HA) aimed to address these issues. In this study, shape retention, firmness, and biocompatibility of 3D MA-HA injected subcutaneously in mice were evaluated. MATERIALS AND METHODS: Fifteen mice, each receiving two subcutaneous injections in their back, were divided into four groups receiving HA, MA-HA, 3D MA-HA, or saline, respectively. Digital imaging, scanning electron microscope (SEM) and in vivo imaging system (IVIS), durometry, and histology were utilized to evaluate in vitro/vivo degradation and migration, material firmness, and the angiogenic (CD31) and immunogenic (CD45) response of the host tissue toward the injected materials. RESULTS: Digital imaging, SEM, and IVIS revealed that 3D MA-HA fillers maintained their predetermined shape for at least 30 days in vitro and in vivo. Little volume effects were noted in the saline and other control groups. There were no differences in skin firmness between the groups or over time. Histology showed intact skin architecture in all groups. Three-dimensional MA-HA maintained its macroporous structure with significant angiogenesis at the 3D MA-HA/skin interfaces and throughout the 3D MA-HA. There was no significant inflammatory response to any of the injected materials. CONCLUSION: 3D MA-HA showed remarkable tissue compatibility, compliance, and shape predictability, as well as retention, and thus might be suitable for various skin sculpting and soft tissue reconstruction purposes.
Assuntos
Criogéis , Ácido Hialurônico , Teste de Materiais , Pele Artificial , Animais , Criogéis/química , Criogéis/farmacologia , Feminino , Ácido Hialurônico/química , Ácido Hialurônico/farmacologia , Camundongos , PorosidadeRESUMO
BACKGROUND: Intermittent external volume expansion using suction enhances the vascular network of soft tissues, possibly increasing fat graft survival. However, the optimal kinetics of application have not been determined. Based on their previous experience, the authors hypothesized that moderate-intensity intermittent external volume expansion application may further enhance both the angiogenic and adipogenic potential. METHODS: Fifty 12-week-old wild-type mice were assigned to five experimental groups (n = 10 per group) and underwent five different intermittent applications of external volume expansion (i.e., single-application control, low-intensity, moderate-intensity, and two groups of high-intensity). Five days after the final stimulation, skin biopsy specimens were obtained from stimulated and contralateral nonstimulated areas. Microscopic sections were analyzed for angiogenesis, skin remodeling, and adipogenesis. RESULTS: Moderate-intensity intermittent stimulation (0.5 hour, 6 times/day for 5 days at -25 mmHg suction) almost doubled cutaneous vascular density (1.9-fold increase), induced skin thickening (1.9-fold increase), and expanded the subcutaneous tissue (2.3-fold increase) compared with control. External volume expansion kinetics did not affect tissue inflammation at 5 days after treatment. High-intensity intermittent stimulations also increased the density of blood vessels (1.6-fold increase compared with controls) but caused tissue damage, whereas low-intensity external volume expansion did not induce significant changes. CONCLUSION: Application of moderate-intensity intermittent external volume expansion optimizes induction of angiogenesis and adipogenesis in soft tissues without tissue damage, holding potential for time-effective recipient-site preconditioning before fat grafting.