Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 28
Filtrar
1.
J Craniofac Surg ; 34(1): e34-e36, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35968971

RESUMO

The limited laxity of the scalp and hair-bearing nature makes it difficult to optimally repair. Primary closure is limited to small defects, while healing by secondary intention requires underlying periosteum. Furthermore, the use of free flaps and skin grafting can lead to unfavorable cosmetic outcomes. This report describes a patient with a large parietal scalp dermatofibrosarcoma protuberans. Multiple resections resulted in a large scalp defect with exposed calvarium. Integra was placed over the exposed calvarium after each debridement and Negative Pressure Wound Therapy (NPWT) was applied. After granulation tissue formed, 2 DermaClose continuous external tissue expansion systems were installed. Following the application and tightening of the external tissue expanders, the wound was reduced in size, facilitating primary closure of the opposing edges. This process allowed for a large area to be covered with hair-bearing scalp with good cosmetic results.


Assuntos
Procedimentos de Cirurgia Plástica , Couro Cabeludo , Humanos , Couro Cabeludo/cirurgia , Expansão de Tecido/métodos , Transplante de Pele , Crânio/cirurgia
2.
J Craniofac Surg ; 33(3): 759-763, 2022 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-34560742

RESUMO

BACKGROUND: The fibula free flap is a major workhorse in facial reconstruction. To decrease operative times, virtual surgical planning (VSP) has been implemented. Traditional VSP is costly and may delay operative planning. in this study, the authors present a novel algorithm using readily accessible software packages to perform VSP in a manner that is quick and cost-effective. METHODS: A 6-part survey was administered to physicians with prior training in facial reconstruction. Fourteen physicians participated regarding outcomes on 10 patients who underwent mandibular or midfacial fibula free flap reconstruction. Participants were asked to match the true postoperative and VSP models and rate the similarity of the models using the Likert scale (0-10). The goal was to determine whether the VSP models accurately depicted the actual reconstruction, and whether they would use VSP in future clinical practice. RESULTS: The physicians surveyed were able to match the models correctly 93.6% of the time. The mean score for the similarity between virtual and actual models ranged between 7.60 and 8.80. Most participants (90.9%) who answered stated they would use our VSP algorithm if they were trained in the protocol. CONCLUSIONS AND RELEVANCE: Virtual surgical planning models were created utilizing our novel algorithm. Participants matched the preoperative VSP plan with the postoperative model most of the time and rated the similarity well. Participants in our study are interested in learning more about physician performed VSP. The authors believe this model may be financially and clinically relevant and serve as an excellent educational tool.


Assuntos
Fíbula/transplante , Retalhos de Tecido Biológico , Reconstrução Mandibular/métodos , Cirurgia Assistida por Computador , Algoritmos , Humanos , Técnicas de Planejamento , Cirurgia Assistida por Computador/métodos , Realidade Virtual
3.
J Craniofac Surg ; 32(5): e472-e473, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33427786

RESUMO

ABSTRACT: Fibula free flaps are standard in facial reconstructions after head and neck cancer resection and typically have short flap ischemia times, often under 2 hours. Methods for short-term flap ischemia are characterized, but methods for extremely prolonged flap ischemia have not been well-described. We describe a 72-year-old patient who underwent composite floor of mouth and mandible resection with fibula free flap reconstruction. Patient intraoperative instability forced flap ischemia of over 10 hours with arterial insufficiency and venous thrombosis. Despite complicated and extremely prolonged ischemia, aggressive local and systemic anticoagulants with intraoperative leach therapy were still effective in flap salvage. The flap ultimately survived without necrosis. This case describes a method to guide surgeons faced with situations of forced, prolonged flap ischemia. Traditionally indicated in short-term ischemia, anticoagulation and leach methods can be effective for intraoperative treatment of extremely prolonged flap ischemia, arterial insufficiency, and venous thrombosis.


Assuntos
Retalhos de Tecido Biológico , Procedimentos de Cirurgia Plástica , Trombose Venosa , Idoso , Fíbula , Humanos , Terapia de Salvação , Trombose Venosa/cirurgia
4.
J Craniofac Surg ; 30(7): 2277-2279, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31574787

RESUMO

OBJECTIVE: To define a reliable and consistent landmark, the superior posterior wall of the maxillary sinus, and to describe how this landmark can be used when repairing orbital floor fractures. METHODS: Retrospective chart review. Patients >18 years old diagnosed with unilateral orbital floor and/or zygomaticomaxillary complex fractures. MAIN OUTCOMES: The distance from the inferior orbital rim to the superior posterior wall of the maxillary sinus (landmark distance), and the distance from the landmark to the entrance of the optic canal were reported. RESULTS: Eighty patients were included in the study. Each had unilateral isolated orbital floor fractures (n = 46) or unilateral zygomaticomaxillary complex fractures with an orbital floor component (n = 34). The contralateral eye in all patients was uninjured, and was used as an internal control. In orbital floor fractures, the mean landmark distance was 38.8 ±â€Š1.4 mm, with a mean distance on the normal side of 38.8 ±â€Š1.6 mm (P = 0.49). Distance to the optic canal on the injured side in isolated orbital floor fracture patients was 9.0 ±â€Š0.8 mm with the same measurement on the normal side being 8.8 ±â€Š0.7 (P = 0.21). In the setting of zygomaticomaxillary complex fracture, the orbital floor length was 38.2 ±â€Š1.3 mm with a mean normal floor length of 37.8 ±â€Š1.1 mm (P = 0.18). The mean distance from the superior posterior wall to optic canal in zygomaticomaxillary complex fractured orbits was 9.2 ±â€Š1.1 mm with a normal side mean length of 9.5 ±â€Š1.0 mm (P = 0.23). No significant difference was found between the measured distances in the fractured orbit and its normal counterpart for both fracture groups. CONCLUSIONS AND RELEVANCE: The superior posterior wall of the maxillary sinus is a reliable landmark that can be used to assist in placement of an orbital floor reconstructive plate. The landmark is unchanged despite the presence of an orbital floor or zygomaticomaxillary sinus fracture.


Assuntos
Órbita/cirurgia , Placas Ósseas , Humanos , Seio Maxilar/cirurgia , Fraturas Orbitárias/cirurgia , Procedimentos de Cirurgia Plástica , Estudos Retrospectivos , Tomografia Computadorizada por Raios X
5.
Cleft Palate Craniofac J ; 55(4): 619-621, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29554454

RESUMO

Untreated auricular hematomas from ear trauma can result in an ear deformation known as cauliflower ear, secondary to fibrosis and new cartilage overgrowth. Cauliflower ear reconstruction has traditionally utilized tools such as a drill or a scalpel in order to improve auricular cosmesis. We present a case report utilizing an ultrasonic aspirator to recontour the fibrosed cartilage of a cauliflower ear. The ultrasonic aspirator has advantages over traditional tools in its ability to provide finely controlled bone removal without damage to surrounding soft tissue. The patient in this case report underwent multistage reconstruction using the ultrasonic aspirator with excellent cosmetic result and patient satisfaction.


Assuntos
Deformidades Adquiridas da Orelha/cirurgia , Hematoma/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Procedimentos Cirúrgicos Ultrassônicos/métodos , Adulto , Humanos , Masculino , Resultado do Tratamento
6.
Radiother Oncol ; 193: 110112, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38309587

RESUMO

OBJECTIVES: We sought to describe outcomes for locally advanced cutaneous squamous cell carcinoma (SCC) involving the parotid treated with volumetric modulated arc therapy (VMAT) versus pencil beam scanning proton beam therapy (PBT). MATERIALS AND METHODS: Patients were gathered from 2016 to 2022 from 5 sites of a large academic RT department; included patients were treated with RT and had parotid involvement by: direct extension of a cutaneous primary, parotid regional spread from a previously or contemporaneously resected but geographically separate cutaneous primary, or else primary parotid SCC (with a cutaneous primary ostensibly occult). Acute toxicities were provider-reported (CTCAE v5.0) and graded at each on treatment visit. Statistical analyses were conducted. RESULTS: Median follow-up was 12.9 months (1.3 - 72.8); 67 patients were included. Positive margins/extranodal extension were present in 34 cases; gross disease in 17. RT types: 39 (58.2 %) VMAT and 28 (41.8 %) PBT. Concurrent systemic therapy was delivered in 10 (14.9 %) patients. There were 17 treatment failures (25.4 %), median time of 168 days. Pathologically positive neck nodes were associated with locoregional recurrence (p = 0.015). Oral cavity, pharyngeal constrictor, and contralateral parotid doses were all significantly lower for PBT. Median weight change was -3.8 kg (-14.1 - 5.1) for VMAT and -3 kg (-16.8 - 3) for PBT (p = 0.013). Lower rates of ≥ grade 1 xerostomia (p = 0.002) and ≥ grade 1 dysguesia (p < 0.001) were demonstrated with PBT. CONCLUSIONS: Cutaneous SCC involving the parotid can be an aggressive clinical entity despite modern multimodal therapy. PBT offers significantly lower dose to organs at risk compared to VMAT, which seemingly yields diminished acute toxicities.


Assuntos
Carcinoma de Células Escamosas , Neoplasias Parotídeas , Terapia com Prótons , Radioterapia de Intensidade Modulada , Neoplasias Cutâneas , Humanos , Carcinoma de Células Escamosas/patologia , Glândula Parótida/patologia , Radioterapia de Intensidade Modulada/efeitos adversos , Terapia com Prótons/efeitos adversos , Neoplasias Cutâneas/radioterapia , Neoplasias Cutâneas/patologia , Recidiva Local de Neoplasia , Neoplasias Parotídeas/radioterapia , Neoplasias Parotídeas/patologia
7.
Muscle Nerve ; 45(5): 692-7, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22499096

RESUMO

INTRODUCTION: Rodent whisking behavior is supported by the buccal and mandibular branches of the facial nerve, but a description of how these branches converge and contribute to whisker movement is lacking. METHODS: Eight rats underwent isolated transection of either the buccal or mandibular branch and subsequent opposite branch transection. Whisking function was analyzed after both transections. Anatomical measurements, and video recording of stimulation to individual branches, were taken from both facial nerves in 10 rats. RESULTS: Normal to near-normal whisking was demonstrated after isolated branch transection. Whisking was eliminated after transection of both branches. The buccal and mandibular branches form a convergence just proximal to the whisker pad, herein called "distal pes." Distal to this convergence, we identified consistent anatomy that demonstrated cross-innervation. CONCLUSION: The overlap of efferent supply to the whisker pad must be considered when studying facial nerve regeneration in the rat facial nerve model.


Assuntos
Nervo Facial/anatomia & histologia , Nervo Facial/fisiologia , Movimento/fisiologia , Vibrissas/inervação , Animais , Denervação/métodos , Estimulação Elétrica , Feminino , Lateralidade Funcional , Distribuição Aleatória , Ratos , Ratos Wistar , Gravação em Vídeo
8.
Curr Opin Otolaryngol Head Neck Surg ; 30(5): 368-374, 2022 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-36004797

RESUMO

PURPOSE OF REVIEW: Glossectomy remains a common treatment of oral tongue malignancies, which has a range of functional impacts depending on the extent of resection. This review aims to categorize and provide context for the approach to reconstructing these defects using recent evidence. RECENT FINDINGS: The reconstruction method of choice should be tailored to the size and location of the glossectomy defect with special consideration to replace tongue volume and preserve mobility. There has been an increasing focus on patient-reported outcomes in oral tongue reconstruction. For defects beyond one-third of the tongue, free tissue reconstruction, and more recently, the submental artery island flap yield excellent results. Advances in reconstruction of larger defects have included preoperative soft tissue planning and assessment of outcomes in total glossectomy patients with laryngeal preservation. SUMMARY: Depending on the defect, the appropriate reconstruction may range from healing by secondary intention to large volume free tissue transfer. In general, functional outcomes diminish with increasing size and complexity of the defect regardless of the reconstructive technique.


Assuntos
Procedimentos de Cirurgia Plástica , Neoplasias da Língua , Glossectomia , Humanos , Retalhos Cirúrgicos , Língua
9.
Craniomaxillofac Trauma Reconstr ; 13(3): 198-204, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33456687

RESUMO

PURPOSE: To determine the clinical utility of computed tomography (CT) imaging following isolated orbital blowout fracture (OBF) repair. METHODS: Single-center retrospective review of adult patients undergoing surgical repair of isolated OBFs between November 2008 and August 2016 who received postoperative CT scans. Preoperative and postoperative examination data, postoperative imaging reads, postoperative courses, and any reoperation documentation were collected from electronic medical records. Postoperative imaging findings were categorized as major, indeterminate, or minor by predicted impact on clinical management. Major findings indicated a need for reoperation, indeterminate a potential reoperation, and minor no reoperation. RESULTS: Fifty-two cases met inclusion criteria: 94.2% (n = 49) of postoperative scans included minor findings, 34.6% (n = 18) indeterminate findings, and 19.2% (n = 10) major findings. Three patients returned to the operating room (OR) for surgical revision. All 3 had a significant and concerning change on postoperative examination. Only 1 also had a major finding on postoperative imaging. The remaining 49 patients had benign postoperative examinations, despite 9 (17.3%) with major imaging findings who did not undergo reoperation. CONCLUSIONS: In the majority of OBF repairs, postoperative CT scan findings were not predictive of a need to return to the OR for revision. Reoperation was instead largely prompted by concerning changes in the postoperative clinical examination. Our findings suggest that postoperative imaging in the absence of clinical concern should not be included in the surgical management of isolated OBFs. Instead, targeted imaging will help reduce radiation exposure and health-care costs without sacrificing patient care.

10.
Curr Opin Otolaryngol Head Neck Surg ; 27(4): 267-273, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31157662

RESUMO

PURPOSE OF REVIEW: This article aims to provide a comprehensive review of the established and emerging applications of various computer-based technologies and smartphone applications in the field of facial plastic surgery. RECENT FINDINGS: Computer-based technologies and smartphone applications have widespread utility across various domains of facial plastic surgery; these include preoperative consultation, surgical planning, intraoperative navigation, custom implant creation, postoperative assessment, physician productivity, communication, and education. Smartphone applications are being utilized for assessment of patients such as those with facial paralysis. Three-dimensional (3D) imaging and 3D printing has influenced preoperative counseling, surgical planning, and execution. The incorporation of intraoperative navigation has the potential to improve the accuracy and precision of facial reconstruction. SUMMARY: Current advances in computer-based technology have made a significant impact on the practice of facial plastic and reconstructive surgery. These technological advances have influenced how we counsel patients, perform procedures, assess outcomes, and learn new techniques.


Assuntos
Face/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Smartphone , Cirurgia Assistida por Computador/métodos , Humanos , Imageamento Tridimensional , Planejamento de Assistência ao Paciente , Impressão Tridimensional , Próteses e Implantes
11.
Craniomaxillofac Trauma Reconstr ; 12(1): 14-19, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30815210

RESUMO

We introduce a novel computer-based method to digitally fixate midfacial fractures to facilitate more efficient intraoperative fixation. This article aims to describe a novel computer-based algorithm that can be utilized to model midface fracture reduction and fixation and to evaluate the algorithm's ability to produce images similar to true postoperative images. This is a retrospective review combined with cross-sectional survey from January 1, 2010, to December 31, 2015. This study was performed at a single tertiary care, level-I trauma center. Ten patients presenting with acute midfacial traumatic fractures were evaluated. Thirty-five physicians were surveyed regarding the accuracy of the images obtained using the algorithm. A computer algorithm utilizing AquariusNet (TeraRecon, Inc., Foster City, CA) and Adobe Photoshop (Adobe Systems Inc., San Jose, CA) was developed to model midface fracture repair. Preoperative three-dimensional computed tomographic (CT) images were processed using the algorithm. Fractures were virtually reduced and fixated to generate a virtual postoperative image. A survey comparing the virtual postoperative and the actual postoperative images was produced. A Likert-type scale rating system of 0 to 10 (0 being completely different and 10 being identical) was utilized. Survey participants evaluated the similarity of fracture reduction and fixation plate appearance. The algorithm's capacity for future clinical utility was also assessed. Survey response results from 35 physicians were collected and analyzed to determine the accuracy of the algorithm. Ten patients were evaluated. Fracture types included zygomaticomaxillary complex, LeFort, and naso-orbito-ethmoidal complex. Thirty-four images were assessed by a group of 35 physicians from the fields of otolaryngology, oral and maxillofacial surgery, and radiology. Mean response for fracture reduction similarity was 7.8 ± 2.5 and fixation plate similarity was 8.3 ± 1.9. All respondents reported interest in the tool for clinical use. This computer-based algorithm is able to produce virtual images that resemble actual postoperative images. It has the ability to model midface fracture repair and hardware placement.

12.
Craniomaxillofac Trauma Reconstr ; 12(3): 205-210, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31428245

RESUMO

There is ample investigation into the optimal timing and approach to orbital blowout fracture (OBF) repair; however, less attention has been directed toward postoperative care. This is a multicenter IRB-approved retrospective review of patients with OBF presenting to our study sites between November 2008 and August 2016. Those with isolated OBF, over 18 years of age, and who had not suffered additional facial injuries or globe trauma were included. A total of 126 surgical cases of isolated OBF repair were identified that met our inclusion and exclusion criteria; 42.1% were outpatient repairs while the remaining 57.9% were admitted for overnight monitoring. Time elapsed prior to repair differed between the two groups at a mean of 8.4 days versus 5.2 days for the outpatient and inpatient cohorts, respectively ( p = 0.001). A majority of inpatient cases underwent immediate repair, while a majority of outpatient cases were delayed. There were two cases of RBH in the outpatient cohort resulting in an overall incidence of 1.6%. In both instances, a significant change in clinical exam including decreased visual acuity, diplopia, and eye pain prompted repeat evaluation and immediate intervention for hematoma evacuation. Estimated hospital charges to the patient's insurance for key components of an inpatient versus outpatient isolated OBF repair amounted to a total cost of $9,598.22 for inpatient management and $7,265.02 for outpatient management without reflexive postoperative imaging. Reflexive postoperative CT scans were obtained in 76.7% of inpatient cases and only two led to a reoperation. No outpatient repairs included reflexive postoperative imaging. Outpatient OBF repair is an attractive alternative to inpatient management. The potential cost savings of outpatient management of OBF, which do not detract from quality or safety of patient care, should not be ignored. Our results will hopefully contribute to updated shared practice patterns for all subspecialties that participate in the surgical management of OBF.

13.
JAMA Otolaryngol Head Neck Surg ; 144(7): 557-563, 2018 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-29800960

RESUMO

Importance: The introduction and evaluation of a novel technique to create nasal prostheses with 3-dimensional (3-D) imaging software may circumvent the need for an anaplastologist. Objectives: To describe a novel computer algorithm for the creation of a 3-D model of a nose and to evaluate the similarity of appearance of the nasal prosthesis with that of the individual's nose. Design, Setting, and Participants: A prospective pilot study with a cross-sectional survey was conducted from August 1 to October 31, 2016, at a tertiary care academic center. Five volunteers were used for creation of the nasal prostheses, and 36 survey respondents with a medical background were involved in evaluating the nasal prostheses. Exposures: A computer algorithm using a 3-D animation software (Blender; Blender Foundation) and Adobe Photoshop CS6 (Adobe Systems) were used to create a 3-D model of a nose. Photographs of 5 volunteers were processed with the computer algorithm. The model was then printed using a desktop 3-D printer. Attending physicians, residents, and medical students completed a survey and were asked to rate the similarity between the individuals' photographs and their 3-D printed nose on a Likert-type scale. Main Outcomes and Measures: The similarity between 3-D printed nasal models and photographs of the volunteers' noses based on survey data. Results: Thirty-six survey respondents evaluated 4 views for each of the 5 modeled noses (from 4 women and 1 man; mean [SD] age, 26.6 [5.7] years). The mean (SD) score for the overall similarity between the photographs and the 3-D models was 8.42 (1.34). The mean scores for each nasal comparison ranged from 7.97 to 8.62. According to the survey, respondents were able to match the correct 3-D nose to the corresponding volunteers' photographs in 171 of 175 photographs (97.7%). All surveyed clinicians indicated that they would consider using this tool to create a temporary prosthesis instead of referring to a prosthodontist. Conclusions and Relevance: This algorithm can be used to model and print a 3-D prosthesis of a human nose. The printed models closely depicted the photographs of each volunteer's nose and can potentially be used to create a temporary prosthesis to fill external nasal defects. The appropriate clinical application of this technique is yet to be determined.


Assuntos
Algoritmos , Impressão Tridimensional , Desenho de Prótese , Rinoplastia/instrumentação , Adulto , Estudos Transversais , Estudos de Viabilidade , Feminino , Humanos , Masculino , Fotografação , Projetos Piloto , Estudos Prospectivos , Software , Adulto Jovem
14.
Otolaryngol Head Neck Surg ; 136(3): 405-10, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17321868

RESUMO

OBJECTIVE: To assess if participation by patients in a head and neck cancer support group improves perceived quality of life (QOL). STUDY DESIGN AND SETTING: Subjects for this study included 47 patients at a tertiary Veterans Affairs Medical Center who were previously treated for head and neck cancer. This was a quasi-experimental, post-test study comparing the QOL of 24 patients who participated in a head and neck cancer support group with 23 patients who did not participate. The validated University of Michigan Head and Neck Quality of Life (HNQOL) instrument was used to evaluate head and neck cancer-related QOL. RESULTS: Patients who participated in the head and neck cancer support group exhibited significantly better scores in the domains of eating, emotion, and pain as well as in the global bother and response to treatment questions of the HNQOL instrument compared with those patients who did not participate. Additional subgroup analysis comparing age, type of treatment, and length of time since cancer diagnosis suggests that these variables were less important predictors of QOL than was support group participation. CONCLUSIONS: Our findings suggest that patient participation in a head and neck cancer support group is associated with improved QOL. SIGNIFICANCE: Support groups may be beneficial in improving QOL after head and neck cancer treatment.


Assuntos
Neoplasias de Cabeça e Pescoço/psicologia , Participação do Paciente , Qualidade de Vida , Apoio Social , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Ansiedade/psicologia , Atitude Frente a Saúde , Transtornos de Deglutição/psicologia , Emoções , Neoplasias de Cabeça e Pescoço/terapia , Humanos , Masculino , Mastigação/fisiologia , Pessoa de Meia-Idade , Dor/psicologia , Salivação/fisiologia , Autoimagem , Ajustamento Social , Fala/fisiologia , Fatores de Tempo , Voz/fisiologia
15.
Laryngoscope ; 127(2): 331-336, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27761894

RESUMO

OBJECTIVES/HYPOTHESIS: To describe a novel computer algorithm that can model mandibular fracture repair. To evaluate the algorithm as a tool to model mandibular fracture reduction and hardware selection. STUDY DESIGN: Retrospective pilot study combined with cross-sectional survey. METHODS: A computer algorithm utilizing Aquarius Net (TeraRecon, Inc, Foster City, CA) and Adobe Photoshop CS6 (Adobe Systems, Inc, San Jose, CA) was developed to model mandibular fracture repair. Ten different fracture patterns were selected from nine patients who had already undergone mandibular fracture repair. The preoperative computed tomography (CT) images were processed with the computer algorithm to create virtual images that matched the actual postoperative three-dimensional CT images. A survey comparing the true postoperative image with the virtual postoperative images was created and administered to otolaryngology resident and attending physicians. They were asked to rate on a scale from 0 to 10 (0 = completely different; 10 = identical) the similarity between the two images in terms of the fracture reduction and fixation hardware. RESULTS: Ten mandible fracture cases were analyzed and processed. There were 15 survey respondents. The mean score for overall similarity between the images was 8.41 ± 0.91; the mean score for similarity of fracture reduction was 8.61 ± 0.98; and the mean score for hardware appearance was 8.27 ± 0.97. There were no significant differences between attending and resident responses. There were no significant differences based on fracture location. CONCLUSION: This computer algorithm can accurately model mandibular fracture repair. Images created by the algorithm are highly similar to true postoperative images. The algorithm can potentially assist a surgeon planning mandibular fracture repair. LEVEL OF EVIDENCE: 4. Laryngoscope, 2016 127:331-336, 2017.


Assuntos
Algoritmos , Simulação por Computador , Fixação Interna de Fraturas , Interpretação de Imagem Assistida por Computador , Imageamento Tridimensional , Fraturas Mandibulares/diagnóstico por imagem , Fraturas Mandibulares/cirurgia , Cirurgia Assistida por Computador/métodos , Tomografia Computadorizada por Raios X , Interface Usuário-Computador , Adulto , Estudos Transversais , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Estudos Retrospectivos , Software
16.
Circulation ; 111(12): 1504-9, 2005 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-15781741

RESUMO

BACKGROUND: Levosimendan is a calcium-sensitizing agent and an inodilator under current investigation in the treatment of decompensated heart failure. The effects of intravenous levosimendan on the human coronary vasculature, together with myocardial wall stress and oxygen uptake, have not been adequately studied. METHODS AND RESULTS: Ten adult patients underwent right- and left-heart catheterization. Baseline coronary blood flow was determined with quantitative coronary angiography and an intracoronary Doppler-tipped guidewire. Myocardial oxygen uptake was measured with a coronary sinus catheter. Echocardiography was performed before and 30 minutes after an intravenous infusion of levosimendan (24-microg/kg bolus over 10 minutes) was begun. Pulmonary capillary wedge decreased 37% (P=0.009), cardiac output increased 9% (P=0.04), and systemic vascular resistance decreased 18% (P<0.001). Left ventricular ejection fraction increased 20% (P=0.009), and meridional systolic wall stress decreased 48% (P=0.009). Coronary artery diameter increased 10% at 15 minutes (P=0.001) and 11% at 30 minutes (P=0.01). Coronary artery velocity increased 10% over baseline (P=0.04). Coronary blood flow increased 45% (P=0.02), whereas coronary resistance decreased 36% at 30 minutes (P=0.03). Myocardial oxygen extraction decreased 9% at 30 minutes (P=0.04). CONCLUSIONS: Levosimendan given intravenously exerts vasodilator effects on human coronary conductance and resistance arteries. Despite a decrease in coronary perfusion pressure, coronary blood flow is increased. A reduction in coronary vascular resistance and a decrease in coronary venous oxygen content indicate primary coronary vasodilation by levosimendan. Improved left ventricular systolic function and decreased myocardial oxygen extraction suggest improved myocardial efficiency.


Assuntos
Hidrazonas/administração & dosagem , Miocárdio/metabolismo , Consumo de Oxigênio/efeitos dos fármacos , Piridazinas/administração & dosagem , Sistema Vasomotor/efeitos dos fármacos , Disfunção Ventricular Esquerda/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Circulação Coronária/efeitos dos fármacos , Vasos Coronários/efeitos dos fármacos , Feminino , Insuficiência Cardíaca/tratamento farmacológico , Insuficiência Cardíaca/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Fluxo Sanguíneo Regional/efeitos dos fármacos , Simendana , Resistência Vascular , Vasodilatação/efeitos dos fármacos
17.
J Card Fail ; 12(7): 507-13, 2006 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16952783

RESUMO

BACKGROUND: Pulmonary hypertension (PH) is characterized by decreased pulmonary vascular expression of nitric oxide (NOx), a vasodilator that increases levels of smooth muscle cyclic guanosine monophosphate (cGMP). This study investigated mechanisms by which the vasodilator B-type natriuretic peptide (BNP) affects the systemic and pulmonary vasculature in PH patients. METHODS AND RESULTS: Twenty PH patients with mean pulmonary artery (PA) pressure > 25 mm Hg were enrolled. Ten had precapillary (pulmonary capillary wedge pressure [PCWP] < or = 15 mm Hg) and 10 had postcapillary (PCWP > 15 mm Hg) PH. Right heart catheterization was performed before and 30 minutes after intravenous nesiritide infusion. NOx and cGMP levels from the PA and systemic (AO) arteries were obtained before and after nesiritide infusion. The postcapillary PH patients demonstrated significantly reduced pulmonary vascular resistance after nesiritide; there was no change in the precapillary PH cohort. NOx levels increased significantly in both AO (P < .0001) and PA (P = .0093), as did cGMP levels (P < .0001). There was a higher increase in NOx levels from the pulmonary arteries in precapillary PH patients compared to postcapillary PH patients (P = .020). CONCLUSION: In PH patients, nesiritide infusion significantly increases NOx levels, suggesting a novel mechanism for its vasodilatory effects. These responses may differ between pre- and postcapillary PH patients.


Assuntos
Hipertensão Pulmonar/sangue , Hipertensão Pulmonar/tratamento farmacológico , Natriuréticos/uso terapêutico , Peptídeo Natriurético Encefálico/uso terapêutico , Óxido Nítrico/sangue , Artéria Pulmonar , Vasodilatadores/uso terapêutico , Adulto , Idoso , Artérias , Capilares , Estudos de Coortes , GMP Cíclico/sangue , Feminino , Hemodinâmica/efeitos dos fármacos , Humanos , Hipertensão Pulmonar/fisiopatologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Pressão Propulsora Pulmonar , Resistência Vascular/efeitos dos fármacos
19.
Neurosurgery ; 70(2 Suppl Operative): 237-43, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21968382

RESUMO

BACKGROUND: Neurofibromatosis type 2 (NF2) is a tumor suppressor syndrome defined by bilateral vestibular schwannomas. Facial paralysis, from either tumor growth or surgical intervention, is a devastating complication of this disorder and can contribute to disfigurement and corneal keratopathy. Historically, physicians have not attempted to treat facial paralysis in these patients. OBJECTIVE: To review our clinical experience with free gracilis muscle transfer for the purpose of facial reanimation in patients with NF2. METHODS: Five patients with NF2 and complete unilateral facial paralysis were referred to the facial nerve center at our institution. Charts and operative reports were reviewed; treatment details and functional outcomes are reported. RESULTS: Patients were treated between 2006 and 2009. Three patients were men and 2 were women. The age of presentation of debilitating facial paralysis ranged from 12 to 50 years. All patients were treated with a single-stage free gracilis muscle transfer for smile reanimation. Each obturator nerve of the gracilis was coapted to the masseteric branch of the trigeminal nerve. Measurement of oral commissure excursions at rest and with smile preoperatively and postoperatively revealed an improved and nearly symmetric smile in all cases. CONCLUSION: Management of facial paralysis is often times overlooked when defining a care plan for NF2 patients who typically have multiple brain and spine tumors. The paralyzed smile may be treated successfully with single-stage free gracilis muscle transfer in the motivated patient.


Assuntos
Paralisia Facial/etiologia , Paralisia Facial/cirurgia , Músculo Esquelético/transplante , Neurofibromatose 2/complicações , Neurofibromatose 2/cirurgia , Adolescente , Adulto , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/inervação , Qualidade de Vida , Estudos Retrospectivos , Transplante de Tecidos/métodos , Adulto Jovem
20.
Otolaryngol Head Neck Surg ; 146(3): 372-6, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22261491

RESUMO

OBJECTIVE: The gracilis muscle free flap has become a reliable means for smile reanimation for patients with facial paralysis. Because it is a buried flap, it presents a postoperative monitoring challenge. We sought to evaluate our experience with color Doppler ultrasound in the monitoring of gracilis free flap viability in the immediate postoperative setting. STUDY DESIGN: Case series with planned data collection. SETTING: Tertiary medical center. METHODS: Patients with facial paralysis treated with gracilis muscle free flap for smile reanimation performed between March 2009 and November 2010 were evaluated by color Doppler ultrasound and included in the study. Our experience with the use of the color Doppler ultrasound to monitor the gracilis muscle flap is presented. RESULTS: Forty-six patients were identified. In all cases, color Doppler ultrasound was used postoperatively to assess flow through the vascular pedicle. Outcomes included an early flap survival rate of 100%, with no instances of equivocal or absent flow on either the arterial or venous side. Color Doppler ultrasound provided important objective information regarding muscle perfusion postoperatively in several instances of equivocal postoperative perfusion of the flap. CONCLUSION: Color Doppler ultrasound is a safe, noninvasive method that can be performed serially to evaluate a buried free flap. We have had success in verifying normal arterial and venous flow through the pedicle using this method of monitoring of the gracilis muscle free flap during facial reanimation, and in 3 instances, it eliminated the need for wound exploration to verify appropriate muscle perfusion.


Assuntos
Paralisia Facial/cirurgia , Músculo Esquelético/diagnóstico por imagem , Retalhos Cirúrgicos , Ultrassonografia Doppler em Cores/métodos , Adolescente , Adulto , Criança , Estudos de Coortes , Paralisia Facial/diagnóstico por imagem , Feminino , Seguimentos , Rejeição de Enxerto , Sobrevivência de Enxerto , Humanos , Masculino , Pessoa de Meia-Idade , Monitorização Fisiológica/métodos , Músculo Esquelético/transplante , Cuidados Pós-Operatórios/métodos , Procedimentos de Cirurgia Plástica/métodos , Recuperação de Função Fisiológica , Índice de Gravidade de Doença , Sorriso , Resultado do Tratamento , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
Detalhe da pesquisa