Bloqueio do plano transverso do abdômen em coelha submetida à mastectomia e ovariohisterectomia / Blockade of the transverse plane of the abdomen in a rabbit submitted to mastectomy and ovariohysterectomy

Os bloqueios locorregionais vêm sendo cada vez mais estudados na medicina veterinária, principalmente em pets não-convencionais e animais silvestres. O bloqueio do plano transverso do abdômen (TAP block) é uma técnica de anestesia locorregional capaz de promover anestesia e analgesia em regiões da pele, musculatura e peritônio parietal, as quais fazem parte da estratégia de analgesia multimodal. O objetivo deste trabalho é relatar o bloqueio do plano transverso em um coelho doméstico de quatro anos de idade submetido à mastectomia regional e ovariohisterectomia. Foram realizados dois pontos bilateralmente de bloqueio do espaço TAP guiado por ultrassom com 2mg/kg de bupivacaína a 0,25%, padronizando um volume total injetado de 2,4mL. Foram utilizados dexmedetomidina (5É¥g/kg) e midazolam (0,5mg/kg) por via intramuscular como medicação pré-anestésica, indução com isoflurano na máscara de oxigênio 100% e manutenção por anestesia inalatória com isoflurano. Os parâmetros fisiológicos mantiveram-se estáveis, sem necessidade de resgate analgésico, com extubação rápida e despertar tranquilo. Desta forma, conclui-se que o TAP block foi eficaz na analgesia para mastectomia regional e ovariohisterectomia como protocolo multimodal, aumentando o índice de segurança, além de ser de fácil execução mesmo com transdutores de baixa frequência.

The locoregional blocks have been increasingly studied in veterinary medicine, especially in non-conventional pets and wild animals. The transverse abdominis plane block (TAP block) is a locoregional anesthesia technique capable of promoting anesthesia and analgesia in the skin, muscle, and parietal peritoneum regions, which are is part of the multimodal analgesia strategy. This study aims to report the transverse plane block in a four-year-old domestic rabbit submitted to regional mastectomy and ovariohysterectomy. Two ultrasound-guided TAP space blocks were performed bilaterally with 2mg/kg of bupivacaine 0.25%, standardizing a total injected volume of 2.4mL. Dexmedetomidine (5É¥g/kg) and midazolam (0.5mg/kg) were used intramuscularly as pre-anesthetic medication, induction with isoflurane in a 100% oxygen mask, and maintenance by inhalation anesthesia with isoflurane. Physiological parameters remained stable, with no need for analgesic rescue, rapid extubation, and peaceful awakening. Thus, it is concluded that the TAP block was effective in analgesia for regional mastectomy and ovariohysterectomy as a multimodal protocol, increasing the safety index. Moreover, it is easy to perform even with low-frequency transducers.

Mammary adenocarcinoma with pulmonary, hepatic and renal metastasis in a chinchilla (Chinchilla laniger)

Background: Chinchillas are small, long-lived hystricomorph rodents closely related to guinea pigs, porcupines and agoutis. Used extensively in scientific research and fur production, its use as a pet has grown exponentially in the last decade, increasing their presence in veterinary clinics and hospitals. The most common health conditions for chinchillas kept as pets are a result of husbandry or dietary deficiencies, and they rarely develop neoplasia. Although rare, neoplasias do occur in these animals and should be included as differential diagnosis. This report describes the occurrence of mammary adenocarcinoma in a companion chinchilla with several metastatic foci in lungs, liver and kidneys.Case: A 6-year-old female chinchilla (Chinchilla laniger) was presented with progressive hyporexia, apathy and a volume increase in the right axillary region. Since the owner noted purulent secretion in the ulcerated mass, he began treatment, without veterinarian consent, using topic rifampicin, 0.5 mL dipyrone sodium oral and 1.5 mL of enrofloxacin. All of which were used orally, once a day, for five days. On presentation at the veterinary hospital, the animal was poorly responsive, mildly dehydrated and had moderate body condition. Physical examination revealed pale mucous membranes, body temperature of 36.4°C and an increased volume, soft upon palpation, near inguinal area. The mass in the right axillary region was adhered, soft and ulcerated. A fine-needle aspiration was performed and the animal was sent home with instructions to perform forced feeding until the citology results were obtained, which were inconclusive. At the owners request, no other diagnostic tests were performed. Six days after initial examination the animal lost 5% of its body weight as anorexy, lethargy and locomotion difficulties progressed, at which point the owner requested euthanasia. The animal was sent for postmortem examination.[...](AU)

Mammary adenocarcinoma with pulmonary, hepatic and renal metastasis in a chinchilla (Chinchilla laniger)

Background: Chinchillas are small, long-lived hystricomorph rodents closely related to guinea pigs, porcupines and agoutis. Used extensively in scientific research and fur production, its use as a pet has grown exponentially in the last decade, increasing their presence in veterinary clinics and hospitals. The most common health conditions for chinchillas kept as pets are a result of husbandry or dietary deficiencies, and they rarely develop neoplasia. Although rare, neoplasias do occur in these animals and should be included as differential diagnosis. This report describes the occurrence of mammary adenocarcinoma in a companion chinchilla with several metastatic foci in lungs, liver and kidneys.Case: A 6-year-old female chinchilla (Chinchilla laniger) was presented with progressive hyporexia, apathy and a volume increase in the right axillary region. Since the owner noted purulent secretion in the ulcerated mass, he began treatment, without veterinarian consent, using topic rifampicin, 0.5 mL dipyrone sodium oral and 1.5 mL of enrofloxacin. All of which were used orally, once a day, for five days. On presentation at the veterinary hospital, the animal was poorly responsive, mildly dehydrated and had moderate body condition. Physical examination revealed pale mucous membranes, body temperature of 36.4°C and an increased volume, soft upon palpation, near inguinal area. The mass in the right axillary region was adhered, soft and ulcerated. A fine-needle aspiration was performed and the animal was sent home with instructions to perform forced feeding until the citology results were obtained, which were inconclusive. At the owner’s request, no other diagnostic tests were performed. Six days after initial examination the animal lost 5% of its body weight as anorexy, lethargy and locomotion difficulties progressed, at which point the owner requested euthanasia. The animal was sent for postmortem examination.[...]