Estado neurológico e cardiorrespiratório de filhotes de cães nascidos de parto normal ou de cesariana sob anestesia geral inalatória com sevofluorano

Abstract

RESUMO A anestesia obstétrica possibilita um procedimento mais seguro para a mãe e para os fetos. Em medicina veterinária, no entanto, a literatura científica a respeito do assunto é deficiente. Este trabalho teve como objetivo avaliar INTRODUÇÃOEm medicina veterinária, nota-se a necessidade de maiores estudos referentes aos procedimentos anestésicos em gestantes, pois as informações a respeito da anestesia nesses pacientes e de seus efeitos nos fetos são escassas. Devido às propriedades físico-químicas dos fármacos, é impossível que eles consigam atravessar a barreira hematoencefálica materna sem penetrar na barreira placentária (THURMON et al., 1996). Dessa forma, o grau de depressão fetal é diretamente proporcional ao grau de depressão materna (DE BIASI, 1999) e os efeitos dos anestésicos atingem o feto diretamente, por cruzarem a placenta, ou indiretamente, por alterarem a função cardiopulmonar materna.

Vitality evaluation methods for newborn puppies after cesarean section performed under general inhalation anestesia

“…Blood gas analyses performed on venous blood samples from the umbilical cord (Table 3) showed high PCO 2 values coupled with low pH, which suggests a scenario of respiratory acidosis and severe acidemia at birth. These results corroborate other findings of low pH and high PCO 2 of puppies born by cesarean surgery in three studies (Crissiuma et al 2006, Gabas et al 2006, Lucio et al 2009. This scenario is also commonly observed during natural labor, as demonstrated by one study using umbilical cord blood samples (Vivan et al 2009) that found high PCO 2 values (65±32mmHg) and low pH (7.1±0.2).…”

“…Neonatal respiratory depression is aggravated by general anesthesia during cesarean surgery owing to the effects of the anesthetics together with the recumbent position of the mother, which causes a decrease in arterial blood pressure and uterine blood flow. These effects indirectly affect fetal viability by decreasing transplacental oxygen transfer in conjunction with the direct depression of the fetuses by the anesthetics (Gabas et al 2006, Lucio et al 2009.…”

“…The techniques for cesarean surgery in bitches are the object of study of many authors who are interested in determining their effects on both the mother and the fetus (Lavor et al 2004, Gabas et al 2006, giving that anesthetic protocols are aimed at survival of both (Domingos et al 2008).…”

“…All of the anesthetics available for veterinary practice are able to cross the placental barrier, quickly affecting the fetuses from the start of the surgical procedure to their removal, and therefore anesthesia can exert great influence on neonatal vitality (Gabas et al 2006). The most frequently occurring consequence is neurological and/or cardiorespiratory depression, which can result in hypoxemia and higher mortality (Crissiuma et al 2006, Veronesi et al 2009.…”

Neonatal Clinical Evaluation, Blood Gas and Radiographic Assessment After Normal Birth, Vaginal Dystocia or Caesarean Section in Dogs

“…In veterinary medicine, there are no studies that consolidate the Apgar score for different species. Some adaptations support the measurement of heart rate (HR), respiratory activity, muscle tone, colour of mucous membranes and vocalization (Moon et al 2001;Gabas et al 2006).…”