14 research outputs found

    Effects of variation oxygen partial pressure on fat tissue before fat grafting in reconstructive surgery

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    Le transfert de tissu adipeux est une des rĂ©volutions de la chirurgie rĂ©paratrice des vingt derniĂšres annĂ©es. Cette technique s’est rapidement imposĂ©e au vu de sa facilitĂ© de rĂ©alisation, de son faible coĂ»t et de son innocuitĂ©. Cependant, le taux de rĂ©sorption imprĂ©visible entre 20 et 80% demeure le principal facteur limitant de cette technique. AprĂšs son prĂ©lĂšvement, le tissu adipeux greffĂ© est oxygĂ©nĂ© par diffusion, jusqu’à sa revascularisation. Une amĂ©lioration des conditions locales en oxygĂšne pourrait amĂ©liorer les rĂ©sultats de la greffe. Dans un premier temps, nous avons montrĂ© que le tissu adipeux Ă©tait en hypoxie et prĂ©sentait des signes de souffrance tissulaire au moment de la rĂ©injection. Nous avons dĂ©montrĂ© que des pressions partielles Ă©levĂ©es augmentaient les phĂ©nomĂšnes inflammatoires observĂ©s. Inversement, si le tissu Ă©tait en hypoxie, il utilisait plus rapidement la voie anaĂ©robie avec des consĂ©quences nĂ©fastes au niveau cellulaire. Nous avons alors utilisĂ© l’hĂ©moglobine issue du ver marin pour augmenter l’oxygĂšne disponible au tissu sans s’exposer aux effets indĂ©sirables de l’hyperoxie. Ce transporteur d’oxygĂšne ne parait pas diminuer les effets de l’hypoxie sur le tissu adipeux aprĂšs son prĂ©lĂšvement, aux concentrations et dans les conditions testĂ©es.Autologous fat grafting has gained in popularity in the field of reconstructive surgery over the past 20 years. Fat is an optimal, simple, low-cost soft-tissue filler. However, unpredictable fat retention remains a major concern as the extent of fat resorption ranges from 20 to 80%. Until revascularization occurs, fat tissue is supplied by oxygen diffusion only. An improvement of oxygen partial pressure of the tissue could improve fat graft retention. First, we demonstrated that fat exhibited severe hypoxia, inflammation, and increased levels of reactive oxygen species at the time of injection. Fat tissue exposed to high oxygen partial pressure exhibited higher signs of inflammation. Conversely, hypoxia reduced the aerobic capacity of the tissue which leads to harmful effects and cell death. Haemoglobin based artificial oxygen carrier M101 from lungworm was used to increase available oxygen without exposing the tissue to high partial pressure of oxygen. Signs of inflammation were not decrease with use of haemoglobin M101 in the concentrations and conditions used

    Les neurotisations dans la prise en charge chirurgicale des paralysies obstetricales du plexus brachial (Ă  propos de 70 neurotisations du nerf supra-scapulaire par le nerf spinal acessoire)

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    L'intĂ©rĂȘt des neurotisations dans la prise en charge chirurgicale des paralysies obstĂ©tricales plexus brachial est grandissant. Parmi les diffĂ©rents transferts utilisables, la neurotisation du nerf supra-scapulaire (NSS) par le nerf spinal accessoire(NSA) est dĂ©sormais couramment employĂ©e pour restaurer l'abduction et la rotation externe active de l'Ă©paule. Ce travail avait pour but d'Ă©tablir une stratĂ©gie quant Ă  l'utilisation de ce transfert dans les POPB. MĂ©thodes : Etude rĂ©trospective portatn sur 70 enfants ayant bĂ©nĂ©ficiĂ© d'une neurotisation du NSS plus ou moins associĂ©e Ă  une reconstruction du plexus par greffes ou Ă  d'autres neurotisations. La durĂ©e moyenne des suivis Ă©tait de 2 ans. RĂ©sultats : Les rĂ©sultats globaux sont bons avec une abduction moyenne de 117 (prĂ©-op=9) et un score de GIlbert de 3,6 (prĂ©-op=0,18). Les rĂ©sultats sont significativement moins bons dans les lĂ©sions totales et lorsque la neurotisation est associĂ©s Ă  des greffes.Conclusion: Le transfert du NSA sur le NSS est une option efficace pour restaurer l'abduction et la rotation externe de l'Ă©paule mais il faut privilĂ©gier son utilisation isolĂ©e, son association Ă  une reconstruction par greffes ne donnant pas de rĂ©sultat satisfaisant.BREST-BU MĂ©decine-Odontologie (290192102) / SudocSudocFranceF

    Postero-Inferior Pedicle Surgical Technique for the Treatment of Grade III Gynecomastia

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    International audienceThis letter allows our team to reiterate our opinion on the place of the postero-inferior pedicle technique in the treatment of gynecomastia..

    Use of the Propeller Lumbar Perforator Flap : A Series of 32 Cases.

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    International audienceLumbosacral substance defect is a challenge in reconstructive surgery because few coverage solutions are available in this anatomical region. Lumbar artery perforator flaps (LAPs) have been progressively developed and make it possible to solve very complex situations. We report a multicenter study on LAP performed to treat medium and low lumbar defects of various etiologies, to highlight the versatility of this flap as well as its robustness and reproducibility.Methods: Between 2012 and 2019, 32 LAPs were performed in the Toulouse and Strasbourg University hospitals. Etiologies of the defects encountered were diverse: chronic wounds following neurosurgery, oncodermatology, burn sequelae, and ballistic injury. All LAPs were used in their pedicled form, turned as propeller, and combined or not with other flaps.Results: We treated 31 patients with 32 LAPs. Average flap size was 14.3 cm (range 8-26) × 6.5 cm (range 5-10), and average arc of rotation was 131.3 degrees (range 70-180 degrees). Only 4 patients (12.9%) presented partial necrosis, but required no other covering procedure because secondary healing was sufficient. No coverage failure was reported. Average follow-up duration was 9.7 months (range 1-18).Conclusions: In the case of lumbosacral defects of various etiologies, propeller LAP is a reliable and efficient surgical procedure, offering the advantage of low donor site morbidity. The reconstructive surgeon should propose this technique to patients as a first-line option where surgery is indicated

    Laparoscopy‐assisted immediate vaginal reconstruction with a vertical pedicled deep inferior epigastric perforator flap for primary melanoma of the vagina

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    International audienceThe vagina is a rare site for primary melanoma. Here, we report on a case of laparoscopy-assisted immediate vaginal reconstruction with vertical pedicled deep inferior epigastric perforator flap
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