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1.
Ann Burns Fire Disasters ; 36(3): 229-233, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38680435

RESUMO

We report a case of severe burn injury in a 42-year-old pregnant patient referred to our hospital's burn unit after experiencing a scald burn injury that burned her neck, chest, trunk, abdomen and limbs. The patient had burn wounds distributed on her neck, all four extremities, the chest and abdomen, with a total burn area of 46.5%. The burn wounds were treated with surgical debridement and then covered with silver sulfadiazine and damp gauze. The patient's wounds were treated every three days. The patient delivered a healthy baby full-term through a spontaneous, vaginal delivery. After delivery, the amniotic membrane from the patient was used as an amniotic membrane graft and was planted on the patient's chest, right arm and right thigh. The amniotic membrane in this patient helped to accelerate the preparation of the wound bed for skin grafting. Split-thickness skin grafts were then used on the wounds and the patient was discharged from the hospital one week later. Patients that present with burn injuries during pregnancy require intense monitoring and careful management from a multidisciplinary team. A collaborative effort needs to be made in order to plan the best outcome for the mother and fetus. Precise and early resuscitation is the first step to treating such cases. The administration of fluids should be titered based on the patient's hemodynamic condition and urine output. Wound management can also be optimized using the amniotic membrane as a temporary dressing before skin grafting.


Nous rapportons le cas d'une femme de 42 ans, enceinte, hospitalisée dans le service après un ébouillantement touchant le cou, le thorax, l'abdomen et les membres, représentant 46,5% SCT. Les pansements étaient réalisés tous les 3 jours avec de la sulfadiazine argentique recouverte de gaze humide. La patiente a accouché naturellement, à terme. Sa membrane amniotique a été utilisée pour recouvrir le thorax et les membres droits en attente de greffes, la patiente étant sortie 1 semaine après leur réalisation. Les patientes se brûlant durant leur grossesse doivent bénéficier d'un suivi multidisciplinaire attentif s'intéressant à la maman et au fœtus. Le remplissage initial doit être adapté à l'hémodynamique et à la diurèse. Le traitement local peut être optimisé, avant greffe, par l'utilisation de la membrane amniotique.

2.
Ann Burns Fire Disasters ; 36(3): 222-228, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38680436

RESUMO

Burn injuries are the fourth most common type of trauma worldwide, after traffic injuries, falls and interpersonal violence. Vascular endothelial growth factor (VEGF) is one of the most critical proangiogenic factors. Failure in angiogenesis is often associated with chronic, non-healing wounds. This study aimed to compare the effect of sterile gauze with normal saline (NaCl) 0.9%, intermittent negative pressure wound therapy (NPWT), continuous NPWT, and silver sulfadiazine dressing on increasing VEGF and angiogenesis in deep dermal burn injury. This experimental laboratory study involved six Yorkshire pigs. Twenty burns were made on each pig's flank and dorsum areas, which were divided into four treatment groups: sterile gauze with NaCl 0.9%, intermittent NPWT, continuous NPWT, and silver sulfadiazine dressing. Skin biopsies were done on days 1, 3, 7, 14 and 21 to evaluate VEGF histoscore and mean microvascular density (MVD). We used immunohistochemical staining of VEGF-165 as VEGF's protein marker and hematoxylin-eosin (HE) to count the MVD. There was a significant difference in mean VEGF histoscore on evaluation day 14, in which continuous NPWT had the highest score compared to sterile gauze with NaCl 0.9%, intermittent NPWT, and silver sulfadiazine. The elevated VEGF histoscore could significantly increase the MVD.


Les brûlures représentent la 4ème cause mondiale de traumatisme, après les accidents de la voie publique, les chutes et les violences interhumaines. Le facteur vasculaire de croissance endothéliale (FVCE) est un des principaux facteurs de l'angiogénèse qui, lorsqu'elle dysfonctionne, fait passer les plaies à la chronicité. Cette étude compare les effets de pansements au sérum physiologique (NaCl), des thérapies à pression négative (TPN) continue ou intermittente et de la sulfadiazine argentique (SFDA) sur l'augmentation du FVCE et l'angiogénèse dans les brûlures de 2ème degré profond. Cette étude expérimentale a été conduite sur 6 porcs Yorkshire. Vingt brûlures ont été réalisées sur les flancs et régions dorsales de chacun d'eux, réparties en 4 groupes selon leur traitement : NaCl, TPN intermittente, TPN continue et SFDA. Des biopsies cutanées ont été réalisées à J1, 3, 7, 14 et 21 afin d'évaluer histologiquement le score FVCE (par mesure colorimétrique de FVCE-165) et la densité microvasculaire (par coloration hématoxyline- éosine). À j14, la TPN continue permettait d'obtenir le score FVCE le plus élevé, comparativement aux 3 autres pansements et pourrait augmenter la densité microvasculaire.

3.
Ann Burns Fire Disasters ; 34(2): 187-191, 2021 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-34584509

RESUMO

Development of an experimental burn model is essential to studying burn wound pathophysiology and progressivity, and identifying the best therapeutic choice before treatment can be applied clinically. Pigs are preferred as animal models for burns because their skin structure and wound regeneration resemble that of humans. We made a novel model to create a deep dermal burn using prospective methods that are easy to use, safe, and consistently reproducible. A custom-made burn device was used to create deep dermal burn wounds. A cylindrical plate made of stainless steel with a diameter of 2cm was connected to an electric heating device that was set to reach temperatures varying between 82-100°C. The hot cylindrical plate was applied perpendicular to the pig's skin with a pressure of 1kgf mechanical force for various periods of time (10-25s). Burns were created on the dorsum of a male Yorkshire pig sedated under anesthesia and analgesia. At the 7th day post burn, the burn wounds were evaluated macroscopically, and when one fulfilled the criteria for deep dermal burn, tissue was harvested for further histological analysis using hematoxylineosin staining. At the end of the study, the burn wounds created by the temperature 92°C for 20s showed tissue damage that meets the criteria for deep dermal burns. The development of this model might be useful for further study on burn wound healing.


La mise au point de méthodes de brûlure expérimentale est essentielle pour l'étude de la physiopathologie et de l'évolution des brûlures, afin d'évaluer les meilleures options thérapeutique. La peau du porc a une structure et un processus de cicatrisation proches de la peau humaine, ce qui fait de sa brûlure un modèle particulièrement fiable. Nous avons développé un modèle de brûlure porcine du 2ème degré simple, sécuritaire et aisément reproductible. Un cylindre d'acier inoxydable de 2 cm de diamètre et connecté à un chauffage électrique réglable entre 82 et 100°C. Il est appliqué perpendiculairement à la peau, sous une pression de 1 kg pendant une durée réglable de 10 à 25 s. Les modèles sont des porcs Yorkshire mâles, la brûlure est infligée sous AG. À J7, les brûlures sont examinées au microscope. Lorsque l'examen confirme l'atteinte au 2ème degré profond, le tissu est conservé pour examen ultérieur après coloration hématoxylineéosine, qui confirme que 20s à 92°C sont nécessaires pour créer ce type de lésion. Ce modèle pourrait servir de base aux futures études sur la cicatrisation des brûlures.

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