Lezama-García Karina, Martínez-Burnes Julio, Pérez-Jiménez Juan Carlos, Domínguez-Oliva Adriana, Mora-Medina Patricia, Olmos-Hernández Adriana, Hernández-Ávalos Ismael, Mota-Rojas Daniel
PhD Program in Biological and Health Sciences (Programa de Doctorado en Ciencias Biológicas y de la Salud), Universidad Autónoma Metropolitana, Mexico City 04960, Mexico.
Animal Health Group, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Tamaulipas, Victoria City 87000, Mexico.
Vet Sci. 2022 Dec 4;9(12):673. doi: 10.3390/vetsci9120673.
The thermal stability of newborns is an essential parameter that can be recorded to evaluate neonatal care. Knowing the thermal windows to evaluate and maintain a constant temperature helps significantly reduce neonatal mortality. This study aimed to assess the superficial temperature alterations in the distinct thermal windows of puppies with mothers of diverse weights and their repercussions. We evaluated the superficial temperature using infrared thermography at eight thermal windows and seven different times: when wet due to the fetal fluid immediately after birth until 24 h of life in newborn puppies from bitches divided into four bodyweight groups. The results revealed a positive correlation between the dam's weight and the ability to achieve thermostability in the newborn puppies in all the evaluated thermal windows. The time effect showed the lowest temperatures when the puppies were still wet, a gradual increase, and the highest temperature at 24 h after birth. The thermal windows with the highest temperatures were abdominal, thoracic, nasal, and upper left palpebral, and those with the lowest were the thoracic limb brachial biceps, thoracic limb elbow, metacarpal, and femoral pelvic limb. A significant increase in the temperatures in the thermal windows of the abdominal, thoracic, and upper left palpebral immediately after ingesting colostrum was observed. The weight of the dams is an important factor that positively intervenes in the thermoregulatory capacity of the puppies, especially when newborns are dry and have been passed 24 h after birth.
新生儿的热稳定性是一个重要参数，可用于记录以评估新生儿护理情况。了解用于评估和维持恒定体温的热窗有助于显著降低新生儿死亡率。本研究旨在评估不同体重母犬所产幼犬在不同热窗下的体表温度变化及其影响。我们在八个热窗和七个不同时间点使用红外热成像技术评估体表温度：从分为四个体重组的母犬所产新生幼犬出生后因羊水浸湿时起，直至出生后24小时。结果显示，在所有评估的热窗中，母犬体重与新生幼犬实现热稳定性的能力之间呈正相关。时间效应显示，幼犬仍处于浸湿状态时温度最低，随后逐渐升高，在出生后24小时达到最高温度。温度最高的热窗是腹部、胸部、鼻部和左上眼睑，温度最低的是胸肢肱二头肌、胸肢肘部、掌骨和股骨盆肢。观察到幼犬摄入初乳后，腹部、胸部和左上眼睑热窗的温度显著升高。母犬的体重是一个重要因素，对幼犬的体温调节能力有积极影响，尤其是当新生儿干燥且已出生24小时后。
