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1.
Ann Plast Surg ; 67(4): 391-6, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21587041

ABSTRACT

BACKGROUND: The aim of this study was to experimentally compare end-to-end and end-to-side neurorrhaphy in perineural window model after motor nerve lesion, evaluating which one was the most effective to preserve nerves. Also, differences in motor and sensorial nerve regeneration were tested to verify differences in nerve regeneration. METHODS: A total of 20 adult male Wistar rats were randomly assigned to 5 groups, and, in each one, a different treatment was performed: besides the control group, and end-to-end or end-to-side graft with motor or sensorial nerves was performed. Silastic sheet was used as a mechanical barrier to prevent innervation from adjacent nerves. After 16 weeks, the specimens were histologically assessed and wet weight was evaluated as a direct parameter of atrophy. RESULTS: The end-to-end neurorrhaphy group presented the best results in terms of mass preservation, but it did not differ significantly from the control group. Motor nerves presented similar results in muscular atrophy. The end-to-side neurorrhaphy group with sensory nerve as donor showed the worst results. CONCLUSIONS: The use of sensory nerves to preserve skeletal muscle trophism is not justified, since, according to our model, it affects 50% to 80% of the muscle mass in a period of 16 weeks. End-to-side neurorrhaphy was demonstrated to be an option for re-enervation of a nerve-deprived motor muscle in selected cases.


Subject(s)
Muscle, Skeletal/innervation , Peripheral Nerve Injuries/surgery , Peripheral Nerves/transplantation , Plastic Surgery Procedures/methods , Surgical Flaps/innervation , Anastomosis, Surgical/methods , Animals , Male , Motor Neurons/physiology , Muscle Denervation , Muscle, Skeletal/pathology , Muscle, Skeletal/transplantation , Muscular Atrophy/etiology , Muscular Atrophy/prevention & control , Nerve Regeneration , Neurons, Afferent/physiology , Peripheral Nerve Injuries/etiology , Random Allocation , Rats , Rats, Wistar , Surgical Flaps/pathology , Tibial Nerve/physiology , Tibial Nerve/surgery
2.
Plast Reconstr Surg ; 124(6): 2012-2018, 2009 Dec.
Article in English | MEDLINE | ID: mdl-19952657

ABSTRACT

BACKGROUND: This study compares two therapies for the reconstruction of digital pulp: direct and reverse flow island flaps. Discriminatory sensation and loss of active range of motion were analyzed, with random allocation of nerve suturing. METHODS: The authors conducted a randomized prospective study of 122 patients with loss of digital pulp substance in one finger between 1995 and 2005. Patients were divided into two groups: direct flow island flap (n = 62) and reverse flow island flap (n = 60). The main outcomes were the capacity to discriminate between two points, and proximal and distal interphalangeal joint motion loss. RESULTS: In the direct flap group, there was no loss of articular mobility in 51 percent of patients in the proximal interphalangeal joint and in 55 percent of patients in the distal interphalangeal joint. The reverse flap group showed no loss of articular mobility of the proximal interphalangeal joint in 85 percent of patients and of distal interphalangeal joint in 82 percent. Maximum amplitude losses of 10 and 15 degrees were observed only in the direct flap group in proximal interphalangeal joint articulation (p < 0.001), and of 10 degrees in 10 percent of patients in distal interphalangeal joint articulation (p < 0.002). All patients (n = 29) with suturing showed a Weber score less than or equal to 8, whereas only four (13 percent) of those without suturing had a score of 8; the rest had higher Weber scores (p < 0.001). CONCLUSION: The direct island flap resulted in motion loss in both articulations of the finger but with better discriminatory sensation in comparison with the reverse flap.


Subject(s)
Finger Injuries/surgery , Plastic Surgery Procedures/methods , Surgical Flaps/blood supply , Surgical Flaps/innervation , Adult , Female , Finger Injuries/diagnosis , Graft Rejection , Graft Survival , Hand Strength/physiology , Humans , Injury Severity Score , Male , Probability , Prognosis , Prospective Studies , Plastic Surgery Procedures/adverse effects , Recovery of Function , Risk Assessment , Sensation/physiology , Statistics, Nonparametric , Young Adult
3.
Rev. AMRIGS ; 52(3): 223-230, jul.-set. 2008. ilus
Article in Portuguese | LILACS | ID: biblio-859135

ABSTRACT

A clínica, o diagnóstico e as possibilidades terapêuticas das lesões da extremidade distal dos dedos (AU)


Clinical presentation, diagnosis and treatment of fingertip injuries (AU)


Subject(s)
Humans , Finger Injuries/surgery , Finger Injuries/diagnosis , Replantation , Tendon Injuries/diagnosis , Tendon Injuries/therapy , Nails/injuries
4.
Plast Reconstr Surg ; 122(2): 614-618, 2008 Aug.
Article in English | MEDLINE | ID: mdl-18626381

ABSTRACT

BACKGROUND: Recently, adipose tissue harvested by liposuction has been identified as a source of processed lipoaspirate cells. The aim of this study was to determine the concentration of processed lipoaspirate cells in adipose tissue obtained by liposuction from different harvest areas in women. METHODS: A prospective cross-sectional study was conducted in 25 women in whom liposuction in four or more different zones in the same procedure was indicated. After selective liposuction, the material was sent to the laboratory, where it was processed for extraction of processed lipoaspirate cells, which were separated from the adipose tissue, quantified, and characterized through determination of c-kit expression. The following harvest regions were evaluated: upper abdomen, lower abdomen, trochanteric region, inner thigh, knee, and flank. The cell concentration obtained at each site was compared by analysis of variance for mixed models. RESULTS: A significant difference was found for cell concentration obtained at the different harvest sites. The cell concentration in the lower abdomen was greater than in other areas, but no significant difference was found in relation to the inner thigh. CONCLUSIONS: The lower abdomen and the inner thigh may have higher processed lipoaspirate cell concentrations. These sites may turn out to be better sources of adult mesenchymal stem cells.


Subject(s)
Adipocytes/cytology , Lipectomy , Mesenchymal Stem Cell Transplantation , Tissue and Organ Harvesting , Adult , Body Mass Index , Cell Count , Cross-Sectional Studies , Female , Humans , Prospective Studies , Young Adult
5.
Ann Plast Surg ; 59(5): 489-94, 2007 Nov.
Article in English | MEDLINE | ID: mdl-17992140

ABSTRACT

The use of the nasoalveolar molding technique (NAM) aims to reduce passively the width of the alveolar gap, while improving the AP discrepancy but also focusing on the nose. We developed a within-subjects study in which 11 infants with unilateral lip deformity and varying degrees of alveolar gaps were treated by NAM. Patients included in the study presented alveolar gap at the first appointment to configure the molding device. Alveolar gap was then measured again at the time of lip repair to evaluate the impact of the appliance utilization, and the nostril shape was reassessed to verify the benefit relative to nose symmetry. All patients obtained significant reduction of the alveolar gap. The appliance also facilitated primary nasal positioning, significantly improving nasal symmetry and nostril shape. NAM constitutes an important adjunct to ameliorate the results of primary definitive lip repair while also improving the surgeon's ability to provide nasal symmetry.


Subject(s)
Alveolar Process/pathology , Alveolar Process/surgery , Cleft Lip/surgery , Cleft Palate/surgery , Congenital Abnormalities/surgery , Nose/pathology , Orthodontic Appliances , Plastic Surgery Procedures/methods , Rhinoplasty/methods , Alveolar Process/abnormalities , Humans , Infant , Infant, Newborn , Models, Dental , Orthodontics, Preventive/methods , Preoperative Care , Prosthesis Design
6.
Acta ortop. bras ; 15(3): 155-157, 2007. ilus
Article in Portuguese | LILACS | ID: lil-460886

ABSTRACT

Um modelo experimental de lesão raquimedular com localização precisa e reproduzível é uma ferramenta extremamente importante para o estudo de novas terapias em lesões raquimedulares. OBJETIVOS: Desenvolver um modelo experimental de lesão raquimedular em ratos que produza lesão completa (paraplegia) com o posicionamento de um sistema que permita o acesso de agentes próximo ao local da lesão para testar agentes terapêuticos locais. MÉTODOS: Quinze ratos Wistar foram submetidos à transecção cirúrgica da medula espinhal, realizada com o uso de tesoura ao nível dos corpos vertebrais de T-13 a L-3 e, ao final do procedimento, à implantação de um cateter subcutâneo para o acesso de agentes terapêuticos locais ao local da lesão. RESULTADOS: Um modelo experimental de paraplegia foi consistentemente desenvolvido com a adição suplementar de um cateter para o acesso de agentes terapêuticos locais ao local da lesão. CONCLUSÃO: Um modelo animal de lesão raquimedular e um sistema para o acesso de agentes terapêuticos locais pode ser reproduzido para o estudo de diferentes modificadores da resposta regenerativa em um modelo de ratos com lesão raquimedular.


An experimental model of spinal cord injury at a precise and reproducible site is an extremely important tool for studying new therapies in spinal cord injuries. OBJECTIVES: To develop an experimental model of spinal cord injury in rats that is able to produce a complete injury (paraplegia) and placing a system enabling agents access close to injury site in order to test local therapeutic agents. METHODS: Fifteen Wistar rats were submitted to surgical transection of the spine, performed by using scissors at the level of T-13 to L-3 vertebral bodies, and, at the end of the procedure, to the insertion of a subdermal catheter intended to enable local therapeutic agents access to injury site. RESULTS: An experimental model of paraplegia was consistently developed by adding a supplementary catheter for local therapeutic agentsÆ access to injury site. CONCLUSION: An animal model of spinal cord injury and a system for local therapeutic agents access can be reproduced for the study of different modifiers of the regenerative response in a model of rats with spinal cord injury.

8.
Acta ortop. bras ; 14(5): 273-275, 2006. ilus, graf, tab
Article in Portuguese | LILACS | ID: lil-443619

ABSTRACT

OBJETIVOS: Foram avaliados os efeitos do uso de células tronco da medula óssea (CTM) e do plasma rico em plaquetas (PRP) na regeneração de nervos periféricos, utilizando um modelo estabelecido de regeneração de nervo ciático em ratos. MÉTODOS: Um defeito nervoso de 10 mm foi reconstruído com a utilização de um tubo de silicone preenchido com CTM, PRP ou ambos. O grupo controle recebeu somente o tubo de silicone. Foi realizado ainda um quinto grupo no qual o intervalo foi reconstruído utilizando o segmento ressecado do nervo. A função motora foi testada seis semanas após a cirurgia utilizando teste de marcha. Após o teste motor, os ratos foram anestesiados, o nervo ciático e o tubo foram ressecados e foi realizada microscopia eletrônica de transmissão. RESULTADOS: A análise quantitativa demonstra uma melhora na recuperação funcional no grupo CTM em comparação com os demais grupos. Regeneração nervosa foi demonstrada no grupo CTM por microscopia eletrônica de trasmissão com uma recuperação praticamente completa da anatomia neural. CONCLUSÃO: Nossos resultados sugerem que o uso de CTM associado com a técnica de tubulização promove uma satisfatória recuperação da função motora e regeneração nervosa.


OBJECTIVES: The effects of the use of bone marrow stem cells (MSC) and platelet-rich plasma (PRP) on peripheral nerves regeneration were assessed by using an established model of sciatic nerve regeneration in rats. METHODS: A 10-mm nervous defect was reconstructed by using a silicone tube filled with MSC, PRP or both. The control group received only the silicone tube. A fifth group was also set, in which the interval was reconstructed by using a dried segment of the nerve. Motor function was tested six weeks after surgery, by means of a gait test. After motor test, the rats were anesthetized, the sciatic nerve and the tube were dried, and the transmission electronic microscopy was performed. RESULTS: The quantitative analysis shows an improved functional recovery in MSC group compared to the other groups. Nervous regeneration was reported for MSC group by means of transmission electronic microscopy with an almost full recovery of the neural anatomy. CONCLUSION: Our results suggest that the use of MSC combined with tubing technique yields a satisfactory recovery of motor function and nervous regeneration.


Subject(s)
Animals , Rats , Nerve Regeneration , Peripheral Nerves/physiology , Peripheral Nerves , Stem Cells , Blood Platelets
9.
Rev. Soc. Bras. Cir. Plást., (1997) ; 20(4): 207-212, out.-dez. 2005. ilus, tab
Article in Portuguese | LILACS | ID: lil-420617

ABSTRACT

Introdução: A primeira causa de maus resultados após uma reparação de tendão flexor em zona 2 é a formação de aderências. Um protocolo de mobilização precoce poderia ajudar a diminuir tais aderências, sob risco de aumentar a taxa de rupturas. Este estudo objetiva avaliar o resultado funcional do reparo de lesões de flexores na zona 2. Método: Foram tratados 136 tendões flexores da mão, na zona 2, em 82 pacientes, todos com lesões unidigitais, com secção completa de ambos os tendões, no caso dos dedos largos, o do flexor pollicis longus, no caso de polegar, submetidos a um protocolo de flexão e extensão ativa precoce. Os resultados foram classificados segundo a Inter¬national Federation for Societies for Surgery of the Hands (IFSSH) e pela classificação de Strickland. Resultados: Os resultados funcionais dos dedos longos foram excelentes (72,2 per cent), bons (26,0 per cent) e regulares (1,9 per cent), de acordo com a classificação de Strickland e bons (81,5 per cent), regulares (16,6 per cent) e pobres (1,9 per cent), segundo a classificação da IFSSH. Os resultados do polegar foram excelentes (96,4 per cent) e regulares (3,6 per cent), de acordo com a classificação de Strickland e excelentes (82,1 per cent), bons (14,3 per cent) e pobres (3,6 per cent), de acordo com a classificação da IFSSH. A taxa de ruptura foi de 6,09 per cent; não obstante, os resultados funcionais dos pacientes reoperados foram satisfatórios. Conclusões: O presente estudo sugere que o protocolo de mobilização ativa precoce no pós-operatório das tenorrafias de flexores da mão em zona 2 pode proporcionar bons resultados funcionais em lesões no dedo único.


Subject(s)
Adult , Humans , Clinical Protocols , Finger Injuries , Rehabilitation , Surgical Procedures, Operative , Tendon Injuries/surgery , Methods , Methods
10.
Rev. Soc. Bras. Cir. Plást., (1997) ; 20(3): 176-181, jul.-set. 2005. ilus, tab
Article in Portuguese | LILACS | ID: lil-420466

ABSTRACT

Introdução: A reconstrução do segmento ósseo mandibular utilizando retalhos ósseos vascularizados após perdas segmentares é o método mais utilizado na atualidade, tendo zonas doadoras que incluem a fibula, o rádio, a escápula e a crista iliaca. Método: Apresenta-se uma análise descritiva e retrospectiva da expenência dos autores em 45 casos de reconstrução mandibular microci-rúrgica em pacientes com defeitos ósseos da mandíbula. Foram uftlizados enxertos ósseos vascularizados, ou da crista ilíaca ou da fíbula, avaliando o comportamento dos enxertos em relação a sua facilidade de uso e viabi-lidade de uma posterior ósseo-integração dos implantes. Resultados: O retalho microcirúrgico de fíbula foi utili-zado em 10 pacientes, e o retalho de crista ilíaca foi em outros 35 casos, Em todos os casos nos quais se utili-zou a fíbula, houve necessidade de osteotomla do segmen-to ósseo transferido e em somente quatro casos a implan-tação dentária foi satisfatória, No entanto, o retalho de crista ilíaca foi realizado sem a necessidade de os-teotomia e toi possível a colocação dos implantes nos 35 retalhos, não sendo observada em nenhum caso falha na integração dos implantes, sendo possívei o retorno à mastigação após 6 meses, Conclusões: As reconstruções realizadas com o retalho microcirúrgico de crista ilíaca evidenciaram bons resultados funcionais. Quanto aos casos em que se utilizou o retalho de fíbula, obtiveram-se piores resultados no que tange à integração dos implantes dentários.


Subject(s)
Adolescent , Adult , Male , Female , Bone Transplantation , Mandible/surgery , Oral Surgical Procedures , Surgical Flaps , Methods , Methods
11.
Rev. Soc. Bras. Cir. Plást., (1997) ; 20(3): 183-186, jul.-set. 2005. ilus, tab
Article in Portuguese | LILACS | ID: lil-420467

ABSTRACT

Introdução: A cirurgia reconstrutiva do membro inferior pode representar um grande desafio para o cirurgião, principalmente quando a lesão a1inge as regiães aquiliana e do calcãneo. Dentre as opções existentes de reconstrução, o retalho adipofascial com pedículo distal apresenta vascularização constante, dimensão variável e pode atingir até mesmo as regiões mais distais. Método: No período de abril de 1995 a maio de 2002, realizaram-se quinze retalhos adipofasciais para a cobertura cutãnea do terço disfal da perna e pé. Resultados: Em um caso observou-se necrose parcial. os demais pacientes obti-veram cobertura adequada que permitiu a deambulação em até seis semanas. A reconstrução imediata foi realizada em oito pacientes, sendo os demais submetidos á cirurgia cerca de uma semana após o trauma. Conclusão: O retalho adipofascial reverso é urna opção confiávei e com resul-tados satisfatórios no tratamento dos defeitos mais dis-tais da perna e região do calcâneo.


Subject(s)
Adult , Male , Female , Calcaneus , Lower Extremity/surgery , Leg Injuries , Surgical Flaps , Methods , Methods
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