Disminución de hemorragia post adenoamigdalectomía mediante la utilzación de subgalato de bismuto / Decrease of post adenoamigdalectomy hemorrhage through the use of bismutal subgalate / Diminuição da hemorragem pós adenotonsilectomia através do uso do subgalato de bismuto

Introducción: la cirugía de amígdalas y adenoides es la más frecuentemente realizada en otorrinolaringología. La incidencia de complicaciones es baja, siendo la hemorragia la más frecuente y seria. Se estima que la incidencia de hemorragia post adenoamigdalectomia es entre 0,1 y 8,1%. Dentro de las técnicas hemostáticas se utilizan suturas, electrocauterio, radiofrecuencia, presión con packs, vasoconstrictores u otras sustancias hemostáticas. Entre estas últimas el subgalato de bismuto (activa el factor XII de la coagulación) ha sido empleado durante décadas para hemostasia de diferentes sitios quirúrgicos. El objetivo de este trabajo es determinar la eficacia de la pasta de subgalato de bismuto en la disminución de hemorragias post adenoamigdalectomías. Material y método: Trabajo retrospectivo con pacientes adultos y pediátricos intervenidos quirúrgicamente de amigdalectomía/ adenoidectomía mediante técnica de Daniels y cureta de Beckmann, a los que se dividió en dos grupos: Uno, sin la utilización de subgalato de bismuto y otro utilizando la pasta hemostática intraoperatoria. Posteriormente se comparó la incidencia de hemorragia postquirúrgica entre ambos grupos. Resultados: El primer grupo incluyó a 2.125 pacientes operados y el porcentaje de hemorragias post quirúrgicas sin la utilización del subgalato de bismuto fue de 4,56% (N=97). El otro grupo se conformó con 1.647 pacientes a los que se les aplicó la pasta de subgalato de bismuto en el lecho sangrante y el porcentaje de hemorragias post quirúrgicas descendió a 1,33% (N=22). La diferencia entre ambos grupos fue estadísticamente significativa p=0,001. Conclusiones: La pasta de subgalato de bismuto disminuye la incidencia de hemorragia post amigdalectomía.

Backgruond: tonsils and adenoid surgery are the most frequently performed in otorhinolaryngology. The incidence of complications is low, being the hemorrhage the most frequent and serious one (estimated between 0.1% and 8.1%). The hemostatic techniques used during surgery are sutures, electrocautery, radio frequency, pressure with packs, vasoconstrictors and other haemostatic substances. Between these last substances, Bismuth Subgalate (activates factor XII of coagulation) has been used during decades for hemostasis in different surgical sites. The objective is to determine the efficacy of Bismuth Subgalate paste in the reduction of postadenotonsillectomy hemorrhage. Material and method: Retrospective study including adult and pediatric patients who underwent tonsilectomy / adenoidectomy using the Daniels technique and Beckmann’s curette, which were divided into two groups: one without the use of bismuth subgalate and another using the intraoperative hemostatic paste. Subsequently, the incidence of postoperative hemorrhage between the two groups was compared. Results: The first group included 2,125 patients operated. The percentage of postoperative hemorrhages without the use of the bismuth subgalate was 4.56% (N = 97). The other group consisted of 1,647 patients in whom the Bismuth Subgalate paste was used as a hemostatic agent during surgery. The percentage of postoperative hemorrhage fell to 1.33% (N = 22). The difference between both groups was statistically significant p = 0.001. Conclutions: Bismuth subgalate paste decreases the incidence of post adenotonsillectomy hemorrhage.

Introdução: amígdalas e adenóides cirurgia é a mais realizada na otorrinolaringologia. A incidência de complicações é baixa, sendo o sangramento mais frequentes e graves. Estima-se que a incidência de hemorragia pós-adenotonsilectomia é entre 0,1 e 8,1%. Entre as técnicas hemostáticos, electrocauterização, suturas, radiofrecuecia, pacotes de pressão vasoconstritores ou outras substâncias hemostáticos são utilizados. O subgalato de bismuto ( ativa o fator de coagulação XII) tem sido usada há décadas para hemostasia de diferentes locais cirúrgicos. O objectivo é determinar a eficiência de pasta de subgalato de bismuto na redução de hemorragias pós-adenoamigdalectomia. Material e método: Estudo retrospectivo com pacientes adultos e pediátricos submetidos á cirurgia de adenoidectomia/ amigdalectomia pela técnica Daniels e cureta Beckmann, que foi dividido em dois grupos: um sem o uso de subgalato de bismuto e a outra usando pasta hemostática intraoperatória subsequentemente na incidência de hemorragia pós-cirúrgica entre os dois grupos foi comparado. Resultados: O primeiro grupo incluiu 2125 pacientes operados e a porcentagem de hemorragias pós-cirúrgico, sem o uso de subgalato de bismuto foi 4,56% (97n) o outro grupo foi formada com 1647 pacientes o qual foi aplicada uma pasta de subgalato de bismuto e a percentagem de hemorragia pós-cirurgia caiu para 1,33% (22n), a diferença entre ambos grupos foi estatisticamente significativa (p:0,001). Conclusões: a pasta de subgalato de bismuto diminui a incidencia de hemorragia pós-adenoamigdalectomia.

Bacterial lipopolysaccharide induces apoptosis in the trout ovary.

BACKGROUND: In mammals it is well known that infections can lead to alterations in reproductive function. As part of the innate immune response, a number of cytokines and other immune factors is produced during bacterial infection or after treatment with lipopolysaccharide (LPS) and acts on the reproductive system. In fish, LPS can also induce an innate immune response but little is known about the activation of the immune system by LPS on reproduction in fish. Therefore, we conducted studies to examine the in vivo and in vitro effects of lipopolysaccharide (LPS) on the reproductive function of sexually mature female trout. METHODS: In saline- and LPS -injected brook trout, we measured the concentration of plasma steroids as well as the in vitro steroidogenic response (testosterone and 17alpha-hydroxyprogesterone) of ovarian follicles to luteinizing hormone (LH), the ability of 17alpha,20beta-dihydroxy-4-pregnen-3-one to induce germinal vesicle breakdown (GVBD) in vitro, and that of epinephrine to stimulate follicular contraction in vitro. We also examined the direct effects of LPS in vitro on steroid production, GVBD and contraction in brook trout ovarian follicles. The incidence of apoptosis was evaluated by TUNEL analysis. Furthermore, we examined the gene expression pattern in the ovary of saline- and LPS-injected rainbow trout by microarray analysis. RESULTS: LPS treatment in vivo did not affect plasma testosterone concentration or the basal in vitro production of steroids, although a small but significant potentiation of the effects of LH on testosterone production in vitro was observed in ovarian follicles from LPS-treated fish. In addition, LPS increased the plasma concentration of cortisol. LPS treatment in vitro did not affect the basal or LH-stimulated steroid production in brook trout ovarian follicles. In addition, we did not observe any effects of LPS in vivo or in vitro on GVBD or follicular contraction. Therefore, LPS did not appear to impair ovarian steroid production, oocyte final maturation or follicular contraction under the present experimental conditions. Interestingly, LPS administration in vivo induced apoptosis in follicular cells, an observation that correlated with changes in the expression of genes involved in apoptosis, as evidenced by microarray analysis. CONCLUSION: These results indicate that female trout are particularly resistant to an acute administration of LPS in terms of ovarian hormone responsiveness. However, LPS caused a marked increase in apoptosis in follicular cells, suggesting that the trout ovary could be sensitive to the pro-apoptotic effects of LPS-induced inflammatory cytokines.