Vascular relaxation of canine visceral arteries after ischemia by means of supraceliac aortic cross-clamping followed by reperfusion

<p>Abstract</p> <p>Background</p> <p>The supraceliac aortic cross-clamping can be an option to save patients with hipovolemic shock due to abdominal trauma. However, this maneuver is associated with ischemia/reperfusion (I/R) injury strongly related to oxidative stress and reduction of nitric oxide bioavailability. Moreover, several studies demonstrated impairment in relaxation after I/R, but the time course of I/R necessary to induce vascular dysfunction is still controversial. We investigated whether 60 minutes of ischemia followed by 30 minutes of reperfusion do not change the relaxation of visceral arteries nor the plasma and renal levels of malondialdehyde (MDA) and nitrite plus nitrate (NOx).</p> <p>Methods</p> <p>Male mongrel dogs (n = 27) were randomly allocated in one of the three groups: sham (no clamping, n = 9), ischemia (supraceliac aortic cross-clamping for 60 minutes, n = 9), and I/R (60 minutes of ischemia followed by reperfusion for 30 minutes, n = 9). Relaxation of visceral arteries (celiac trunk, renal and superior mesenteric arteries) was studied in organ chambers. MDA and NOx concentrations were determined using a commercially available kit and an ozone-based chemiluminescence assay, respectively.</p> <p>Results</p> <p>Both acetylcholine and calcium ionophore caused relaxation in endothelium-intact rings and no statistical differences were observed among the three groups. Sodium nitroprusside promoted relaxation in endothelium-denuded rings, and there were no inter-group statistical differences. Both plasma and renal concentrations of MDA and NOx showed no significant difference among the groups.</p> <p>Conclusion</p> <p>Supraceliac aortic cross-clamping for 60 minutes alone and followed by 30 minutes of reperfusion did not impair relaxation of canine visceral arteries nor evoke biochemical alterations in plasma or renal tissue.</p

Nurses' knowledge and practices regarding pain management in newborns

OBJETIVO Verificar el conocimiento y las prácticas de los enfermeros sobre el manejo del dolor de recién nacidos admitidos en Unidades de Tratamiento Intensivo Neonatal. MÉTODO Estudio descriptivo y transversal. Los datos fueron recolectados con 51 enfermeros, mediante un cuestionario adaptado que tiene el fin de evaluar el conocimiento y las prácticas acerca del manejo del dolor neonatal, en seis hospitales de Curitiba y Región Metropolitana. RESULTADOS Para la mayoría de los enfermeros (86,0%), los neonatos sienten dolor. Un total del 34,7% afirmaron nunca utilizar escalas de evaluación del dolor. El registro del manejo del dolor fue realizado por el 84,3% de los enfermeros. Las medidas farmacológicas realizadas fueron Paracetamol y Fentanilo (47,1%) y Morfina (17,6%); las no farmacológicas adoptadas fueron solución azucarada (68,6%), succión no nutritiva (58,8%) y posicionamiento (56,9%). CONCLUSIÓN Los enfermeros consideraron el dolor neonatal como un evento real; sin embargo, no realizaban evaluación o tratamiento del dolor en el recién nacido de modo sistematizado. Es necesario implantar estrategias de traducción del conocimiento a fin de perfeccionar el manejo del dolor de recién nacidos.OBJETIVO Verificar o conhecimento e as práticasdos enfermeiros sobreo manejo da dor de recém-nascidos admitidos em Unidades de Tratamento Intensivo Neonatal. MÉTODO Estudo descritivo e transversal. Os dados foram coletados com 51 enfermeiros, a partir de um questionário adaptado que visa avaliar o conhecimento e as práticas sobre o manejo da dor neonatal, em seis hospitais de Curitiba e Região Metropolitana. RESULTADOS Para a maioria dos enfermeiros(86,0%), os neonatos sentem dor. Um total de 34,7% afirmaramnunca utilizar escalas de avaliaçãoda dor. O registro do manejo da dor foi realizado por 84,3% dos enfermeiros. As medidas farmacológicas realizadas foram Paracetamol e Fentanil (47,1%) e Morfina (17,6%);as não farmacológicas adotadas foram solução adocicada (68,6%), sucção não nutritiva (58,8%) e posicionamento (56,9%). CONCLUSÃO Os enfermeiros consideraram a dor neonatal como um evento real, porém não realizavam avaliação ou tratamento da dor no recém-nascido de modosistematizado. É necessário implementarestratégias de tradução do conhecimento paraaprimorar o manejo da dor de recém-nascidos.OBJECTIVE To analyze nurses' knowledge and practices regarding pain management of newborns admitted to Neonatal Intensive Care Units. METHOD A descriptive and cross-sectional study. Data were collected from 51 nurses based on an adapted questionnaire aimed at evaluating knowledge and practices regarding the management of neonatal pain in six hospitals in Curitiba and its Metropolitan Region. RESULTS For most nurses (86.0%), neonates feel pain. A total of 34.7% of the nurses reported never using pain assessment scales. Pain management was recorded by 84.3% of the nurses. Administered pharmacological measures were Paracetamol and Fentanyl (47.1%) and Morphine (17.6%); while non-pharmacological measures adopted were sweetened solution (68.6%), non-nutritive sucking (58.8%) and positioning (56.9%). CONCLUSION Nurses considered neonatal pain a real event; however, they do not perform pain assessment or treatment of newborns in a systematized way.It is necessary to implement knowledge translation strategiesin order to improve pain management in newborns