Locoregional anesthesia due to tumescence in bilateral total mastectomy of goats

Background: Mastitis is an inflammation of the mammary gland or udder, regardless of its origin, severity, or evolution. Bilateral total mastectomy is indicated in cases of chronic suppurative mastitis, gangrenous mastitis, udder neoplasm or hyperplasia. For mastectomy, the supine position is recommended and, as it is a long-term procedure, general anesthesia was chosen together with the tumescence technique with the objective of transanesthetic and postoperative analgesia. The present report aims to report the general anesthesia protocol used for 2 goats submitted to bilateral total mastectomy associated with a locoregional block by tumescence, a technique not described in the goat species. Cases: Two female goats, mixed breed, approximately 3 years old, were admitted to the Hospital Veterinário de Grandes Animais (HVGA) of the Universidade Federal Rural do Rio de Janeiro (UFRRJ), with a history of recurrent mastitis. There was an increase in udder volume and the presence of purulent secretion during milking. One of the animals had given birth about 20 days ago. Surgical treatment through bilateral total mastectomy was recommended for both animals, as they did not present a satisfactory response to antimicrobial therapy, excessive enlargement and functional loss of the mammary system. For the procedure, food fasting for 48 h and water fasting for 24 h was established. The anesthetic protocols used consisted of previous sedation with xylazine1 [Xilazin® - 0.05 mg/kg, IM] anesthetic induction with ketamine2 [Ketalex® - 10 mg/kg, IV] and midazolam3 [Dormire® - 0.1 mg/kg, IV]. Orotracheal intubation and connection to the anesthetic circuit were performed for maintenance through inhalation anesthesia with isoflurane4 (Forane®) and oxygen therapy. Then, in bottle of lactated ringer's solution5 [Linhamax® - 500 mL], lidocaine 2%6 without vasoconstrictor [Lidovet® - 40 mL] and adrenaline7 [Adren® - 25 mg/mL, 0.5 mL] were added, 10 mL/kg of the solution were injected into the subcutaneous tissue of the region of the mammary chains utilizing a Klein cannula after local antisepsis. After the administration of the tumescent solution, it was observed that the area involved is presented with the formation of a gel and there is minimal bleeding, compared to the conventional technique. The animals were monitored for the degree of analgesia, recording vital signs every 15 min at the end of the surgery, dipyrone9 [D-500® - 25 mg/kg, IV], morphine7 [Sulfato de Morfina® - 0.1 mg/kg, SC], and meloxicam10 [Maxican® 0.5 mg/kg, IM, 3 consecutive days] for postoperative analgesia. Additionally, tetanus serum1 [Vencosat® - 50,000 IU, single dose] and of oxytetracycline¹ [Oxitetraciclina LA® - 10 mg/kg, IM, 5 applications on alternate days)]. In the following 24 h, no signs of pain were observed on palpation of the surgical wound in the animals, but goat 1 was apathetic and inappetent, with improvement in the clinical picture only 48 h after surgery. Discussion: The choice of the surgical procedure resulted in an improvement in the clinical conditions of the animals and the anesthetic protocol using inhalation anesthesia and locoregional block (tumescence) proved to be efficient to perform in goats, contributing to transanesthetic and postoperative analgesia, being easily applied to ruminants that need surgical interventions in the region of mammary chains.

Anestesia regional intravenosa (bloqueio de Bier) em urubu-de-cabeça-preta (Coragyps atratus) submetido à amputação de dígito / Regional intravenous anaesthesia (Bier's block) in black-headed vulture (Coragyps atratus) submitted to digit amputation

Background: The Coragyps atratus flies long distances in search of food and has a marked behaviour of food competition. Since they are frequently found in areas of recent human occupation, they are subject to trauma, which may require surgical interventions. Locoregional blocks are used as part of a balanced-anaesthesia protocol and are currently being evaluated in birds, with brachial plexus block being the main technique described in the literature. However, to our knowledge, this is the first description of intravenous regional anaesthesia (Bier's block) in a vulture. Thus, we aim to report the use of Bier's block with 1% lidocaine, in a black-headed vulture submitted to digit amputation. Case: A black-headed vulture (Coragyps atratus), weighing 2 kg, was rescued and referred to the Veterinary Hospital due to its inability to fly. Physical examination revealed a swollen digit in the right pelvic limb. Radiographic examination confirmed the intermediate phalanx fracture of the 4th digit of the right pelvic limb with signs suggestive of advanced osteomyelitis. The animal was referred to surgery for amputation of the affected digit. Before surgery, water and food were withdrawn for 12 h. Pre-anaesthetic medication consisted of 1 mg/kg midazolam and 0.5 mg/kg morphine intramuscularly (IM). Anaesthetic induction was performed through face mask with isoflurane, followed by orotracheal intubation with a 3 mm-endotracheal tube. Anaesthesia was maintained with isoflurane through a non-rebreathing circuit in 100% oxygen. Using a multiparametric monitor, heart rate (HR), respiratory rate (RR), end-tidal CO2 (EtCO2 ), oxyhemoglobin saturation (SpO2 ), electrocardiography (ECG), systolic blood pressure (SBP) and core temperature (CT) were evaluated. Antisepsis of the right pelvic limb was performed and an elastic band was applied around the distal region of the affected tibia to serve as a tourniquet. A scalp vein set was used to access the lateral saphenous vein in the region distal to the tourniquet, and 5 mg/ kg lidocaine 1% was injected intravenously. The patient remained stable during the procedure, with no need for analgesic rescue. The tourniquet was gradually released 40 min past its application, being completely removed after 45 min of surgery. The anaesthetic supply was interrupted, with extubation after 4 min; the patient had satisfactory anaesthetic recovery. Discussion: The present report describes the success in using the technique of intravenous regional anaesthesia with 1% lidocaine for digit amputation performed on a specimen of black-headed vulture. The pre-anaesthetic medication provided analgesia, satisfactory sedation for venoclysis, and anaesthetic induction without complications. Anaesthetic induction and maintenance in birds are preferably performed with inhaled anaesthetics, thus the choice of mask induction. Despite the reduction in RR soon after induction, the patient remained on spontaneous ventilation. Bier's block using 5 mg/kg lidocaine showed to be an easy and safe technique in vultures, but doses up to 6 mg/kg lidocaine are not associated with adverse effects in birds. The intravenous regional anaesthesia technique described in this manuscript promoted adequate analgesia for the digit amputation procedure in black-headed vultures and allowed hemodynamic stability without significant anaesthetic complications. Thus, the present report points to the potential use of this locoregional block in other birds.

Bloqueio do plano serrátil associado ao transverso do abdômen na mastectomia total unilateral em cadela / Blocking of the Serratus Plan associated with the Transverse Abdominis in a total unilateral mastectomy in bitch

A anestesia locorregional, em pequenos animais, está em crescente utilização como forma de promover analgesia para procedimentos cirúrgicos, através do bloqueio reversível da condução do impulso nervoso. Assim, o objetivo deste trabalho foi relatar o uso do bloqueio locorregional do plano serrátil (SP block) associado ao bloqueio locorregional do plano transverso do abdômen (TAP block) em uma cadela da raça Lhasa Apso. A associação de tais bloqueios visou à insensibilização da musculatura na região da cadeia mamária para um procedimento cirúrgico de mastectomia unilateral total. A cadela castrada, foi encaminhada para a mastectomia unilateral total direita, apresentando nódulos nas glândulas mamárias torácica caudal e inguinal. Os bloqueios foram realizados com a paciente em decúbito dorsal, utilizando-se bupivacaína a 0,25%. Em seguida, a paciente foi liberada para o procedimento, o qual foi monitorado. Os parâmetros de eletrocardiografia, frequência respiratória, frequência cardíaca, oximetria de pulso, pressão arterial oscilométrica (composta por pressão arterial sistólica, pressão arterial diastólica e pressão arterial média), capnografia e temperatura esofágica foram anotados a cada dez minutos em uma ficha de avaliação anestésica. Durante a recuperação pós-operatória, foi realizada a avaliação de dor aguda por meio da escala de dor da Universidade de Melbourne. Os resultados demonstram que a associação do TAP block com o SP block foi eficiente em promover analgesia para uma mastectomia total unilateral de cadela.

Locoregional anesthesia in small animals is increasingly used as a way to promote analgesia for surgical procedures, through a reversible block of nerve impulse conduction. Thus, the objective of this study was to report the use of locoregional block of the serratus plane (SP block) associated with the locoregional block of the transverse abdominis plane (TAP block) in a bitch of the Lhasa Apso breed. The association of such blocks aimed to desensitize the musculature in the region of the mammary chain for a surgical procedure of total unilateral mastectomy. The castrated bitch was referred for total right unilateral mastectomy, showing nodules in the caudal thoracic and inguinal mammary glands. The blocks were performed with the patient in dorsal decubitus, using 0.25% bupivacaine. Then, the patient was released for the procedure, which was monitored. The parameters of electrocardiography, respiratory rate, heart rate, pulse oximetry, oscillometric blood pressure (composed of systolic blood pressure, diastolic blood pressure, and mean blood pressure), capnography, and esophageal temperature were recorded every 10 minutes in an anesthetic evaluation form. During the postoperative recovery, acute pain was evaluated using the pain scale of the University of Melbourne. The results demonstrate that the association of TAP block with SP block was efficient in promoting analgesia for a total unilateral mastectomy in a bitch.

Comparison of two volumes for sciatic perineural injection using 1% methylene blue in rabbit cadavers / [Comparação de dois volumes para injeção perineural no nervo isquiático utilizando azul de metileno 1% em cadáveres de coelhos]

The purpose of this study was to assess the efficacy of a blind technique for sciatic and femoral nerve block in rabbit cadavers by evaluating the spread of 1% methylene blue at two different volumes. Nine recently euthanized rabbits weighing 2.5(0.3kg were used. The sciatic (SN) and femoral (FN) nerves of each limb were randomly assigned for injection with 1% methylene blue at 0.2mL/kg (G0.2) or 0.3mL/kg (G0.3). Nerves were dissected and measured for depth and extension of staining (cm). Mean comparisons were performed using paired t test. The relation between volume and nerve staining ( 2cm was assessed using chi-square test. The mean depth of SN was 1.9±0.2 and 1.6±0.3cm and staining 1.9±1.4 and 2.0±1.2cm, respectively in G0.2 and G0.3. No relation was found between depth and dye spread and there was no association between nerve staining ( 2.0cm and volume of solution. The FN failed to be stained in all subjects. In conclusion, SN injection can be successfully performed without guidance in rabbits. The lower volume (0.2mL/kg) is recommended to avoid systemic toxicity.(AU)

O objetivo deste estudo foi avaliar a eficácia de uma técnica para bloqueio às cegas dos nervos isquiático e femoral em cadáveres de coelhos, por meio da avaliação da dispersão de azul de metileno 1% em dois volumes distintos. Nove coelhos recém-eutanasiados, com peso 2,5(0,3kg, foram utilizados. Os nervos isquiático (NI) e femoral (NF) de cada membro foram aleatoriamente designados para injeção com azul de metileno 1% a 0,2mL/kg (G0,2) ou 0,3mL/kg (G0,3). Em seguida, foram dissecados e mensurados em relação à sua profundidade e extensão corada (cm). As médias foram comparadas por meio de teste t pareado. A relação entre volume e extensão corada ( 2cm foi avaliada utilizando-se teste de qui-quadrado. A profundidade média do NI foi 1,9±0,2 e 1,6±0,3cm, e a extensão corada 1,9±1,4 e 2,0±1,2cm, respectivamente, no G0,2 e no G0,3. Não houve relação entre a profundidade e a extensão corada ou entre a extensão corada ( 2,0cm e o volume de solução. Não foi observada coloração do NF em nenhum cadáver. Concluiu-se que a injeção do NI pode ser realizada com sucesso sem auxílio de tecnologias em coelhos. O menor volume (0,2mL/kg) é recomendado para evitar toxicidade sistêmica.(AU)

Hypersensitivity in chicken (Gallus gallus domesticus) due to the association of lidocaine and bupivacaine in neural-guided femoral and sciatic nerve block

Background: Osteosyntheses, orthopedic surgeries that cause highly painful stimulation, are increasingly common inveterinary medicine. Epidural anesthesia is used to provide intraoperative and postoperative analgesia in mammals undergoing pelvic limb surgery. In birds, the synsacrum, the bone originating from the fusion of the lumbar and sacral vertebrae,makes this route inapplicable, thus peripheral nerve block is an easier option in this species. This report describes a caseof local hypersensitivity following the association of lidocaine and bupivacaine in anesthetic blocks of the femoral andsciatic nerves in chickens (Gallus gallus domesticus).Case: A study was conducted in chickens evaluating the effectiveness of anesthetic sciatic and femoral nerve blocks, guidedby a neural stimulator. Thirty-two 42-day-old male chickens of the species Gallus gallus domesticus, double breasted,weighing 1.86 ± 0.5 kg, were randomly divided into four groups: control (CG), lidocaine (LG), bupivacaine (BC) andthe association of lidocaine and bupivacaine (LBG). The doses used were 4 mg/kg of 2% lidocaine and 2 mg/kg of 0.5%bupivacaine, without vasoconstrictor. For CG, 0.9% NaCl solution was used, respecting the total volume of 1 mL/kg.Only one bird from the LBG showed side effects, presenting sensory and motor loss for 24 h after the administration ofthese drugs, before euthanasia was performed using anesthetic induction with isoflurane through a face mask, followedby the intravenous administration of propofol and then potassium chloride. The chicken was submitted to a necropsy andmacroscopically, soft, irregular, brownish lesions with a grayish focus were observed...

Hypersensitivity in chicken (Gallus gallus domesticus) due to the association of lidocaine and bupivacaine in neural-guided femoral and sciatic nerve block

Background: Osteosyntheses, orthopedic surgeries that cause highly painful stimulation, are increasingly common inveterinary medicine. Epidural anesthesia is used to provide intraoperative and postoperative analgesia in mammals undergoing pelvic limb surgery. In birds, the synsacrum, the bone originating from the fusion of the lumbar and sacral vertebrae,makes this route inapplicable, thus peripheral nerve block is an easier option in this species. This report describes a caseof local hypersensitivity following the association of lidocaine and bupivacaine in anesthetic blocks of the femoral andsciatic nerves in chickens (Gallus gallus domesticus).Case: A study was conducted in chickens evaluating the effectiveness of anesthetic sciatic and femoral nerve blocks, guidedby a neural stimulator. Thirty-two 42-day-old male chickens of the species Gallus gallus domesticus, double breasted,weighing 1.86 ± 0.5 kg, were randomly divided into four groups: control (CG), lidocaine (LG), bupivacaine (BC) andthe association of lidocaine and bupivacaine (LBG). The doses used were 4 mg/kg of 2% lidocaine and 2 mg/kg of 0.5%bupivacaine, without vasoconstrictor. For CG, 0.9% NaCl solution was used, respecting the total volume of 1 mL/kg.Only one bird from the LBG showed side effects, presenting sensory and motor loss for 24 h after the administration ofthese drugs, before euthanasia was performed using anesthetic induction with isoflurane through a face mask, followedby the intravenous administration of propofol and then potassium chloride. The chicken was submitted to a necropsy andmacroscopically, soft, irregular, brownish lesions with a grayish focus were observed...(AU)

Bloqueio do plexo-braquial e peridural lombossacra em um quati (Nasua nasua) / Brachial plexus block and lumbosacral epidural in a South American coati (Nasua nasua)

Background: The South American coatis (Nasua nasua) are capable of adapting to different habitats, which allowed themto exchange between domestic and wild areas, increasing the occurrence of traumas. Procedures performed in this speciesdemand anesthetic protocols that take comorbidities into account and cause minimal cardiorespiratory depression as wellas rapid recovery. It is in such context that locoregional anesthesia has become an essential tool. Thus, we aim to reportthe use of two techniques of locoreginal block: brachial plexus block and lumbosacral epidural block, in a Nasua nasuasubmitted to osteosynthesis of the radius and caudectomy due to trauma.Case: A adult male coati weighing 2.3 kg was referred to the Veterinary Medical Teaching Hospital of the UniversidadeFederal do Paraná (UFPR) - Setor Palotina with a history of trauma. Physical examination showed crackling in the radius and ulnar region, and also abnormal angulation in the distal portion of the tail. After taking x-rays, fractures wereconfirmed in the distal radius and in the distal portion of the tail. The patient was referred for surgery. After 8 h of waterand food withdrawal, the animal was premedicated with a combination of ketamine (10 mg/kg), midazolam (0.3 mg/kg)and methadone (0.2 mg/kg), intramuscularly (IM). Induction of anesthesia was performed with propofol titrated to effect(total dose 4 mg/kg) and anesthesia was maintained with isoflurane in spontaneous ventilation using a non-rebreathingcircuit (Baraka). It was evaluated heart rate (HR), respiratory rate (RF), end-tidal CO2 (EtCO2), expired isoflurane fraction (FE´Iso), oxyhemoglobin saturation (SpO2), electrocardiography (ECG), systolic blood pressure (SBP) and coretemperature (CT) using a multiparametric monitor. After the stabilization period, the animal was positioned in lateral...

Bloqueio do plexo-braquial e peridural lombossacra em um quati (Nasua nasua) / Brachial plexus block and lumbosacral epidural in a South American coati (Nasua nasua)

Background: The South American coatis (Nasua nasua) are capable of adapting to different habitats, which allowed themto exchange between domestic and wild areas, increasing the occurrence of traumas. Procedures performed in this speciesdemand anesthetic protocols that take comorbidities into account and cause minimal cardiorespiratory depression as wellas rapid recovery. It is in such context that locoregional anesthesia has become an essential tool. Thus, we aim to reportthe use of two techniques of locoreginal block: brachial plexus block and lumbosacral epidural block, in a Nasua nasuasubmitted to osteosynthesis of the radius and caudectomy due to trauma.Case: A adult male coati weighing 2.3 kg was referred to the Veterinary Medical Teaching Hospital of the UniversidadeFederal do Paraná (UFPR) - Setor Palotina with a history of trauma. Physical examination showed crackling in the radius and ulnar region, and also abnormal angulation in the distal portion of the tail. After taking x-rays, fractures wereconfirmed in the distal radius and in the distal portion of the tail. The patient was referred for surgery. After 8 h of waterand food withdrawal, the animal was premedicated with a combination of ketamine (10 mg/kg), midazolam (0.3 mg/kg)and methadone (0.2 mg/kg), intramuscularly (IM). Induction of anesthesia was performed with propofol titrated to effect(total dose 4 mg/kg) and anesthesia was maintained with isoflurane in spontaneous ventilation using a non-rebreathingcircuit (Baraka). It was evaluated heart rate (HR), respiratory rate (RF), end-tidal CO2 (EtCO2), expired isoflurane fraction (FE´Iso), oxyhemoglobin saturation (SpO2), electrocardiography (ECG), systolic blood pressure (SBP) and coretemperature (CT) using a multiparametric monitor. After the stabilization period, the animal was positioned in lateral...(AU)

Bloqueio motor e sensitivo da lidocaína ou da ropivacaína peridural em cães / [Motor and sensitive blockade provided by epidural lidocaine or ropivacaine in dogs]

Objetivou-se avaliar o bloqueio sensitivo e motor da administração peridural de 0,2mL/kg de duas concentrações de ropivacaína em comparação à lidocaína em cães. Utilizaram-se 24 cães, distribuídos em quatro grupos: NaCl a 0,9% (GS), lidocaína a 2% (GL), ropivacaína a 0,5% (GR5) e ropivacaína a 0,75% (GR7,5). Avaliaram-se a presença de movimentação espontânea, deambulação, sensibilidade superficial e profunda nos momentos cinco, 10, 15, 20, 25, 30, 45, 60, 90, 120, 180, 240 e 300 minutos após peridural. O retorno à movimentação espontânea foi semelhante entre GL (42,50 ± 6,12) e GR7,5 (69,2 ± 58,9). O tempo para deambulação foi mais prolongado em GR7,5 (107,5 ± 79,3) que em GS (9,2 ± 3,8) e em GR5 (32,5 ± 20,9). O retorno da sensibilidade profunda foi maior em GR 7,5 (152,5 ± 89,2) que em GS (5,8 ± 2,0), GR5 (46,7 ± 46,3) e GL (52,5 ± 20,7). O tempo de retorno da sensibilidade superficial foi maior em GR7,5 (205,0 ± 129,3) que em GS (7,5 ± 2,7), GL (72,5 ± 19,9) e GR5 (97,5 ± 55,1). Apesar do retorno precoce da movimentação, ropivacaína 0,75% está relacionada a tempo prolongado de recuperação da função muscular e bloqueio sensitivo mais prolongado que lidocaína e ropivacaína 0,5%.(AU)

The aim of the present study was to evaluate the sensory and motor blockade of epidural 0.5% and 0.75% Ropivacaine or Lidocaine in dogs. Twenty-four dogs were distributed in four groups: 0.9% NaCl (GS), 2% lidocaine (GL), 0.5% ropivacaine (GR5) and 0.75% ropivacaine (GR7.5). Spontaneous movement, ability to walk, superficial, and deep pain response were assessed 5, 10, 15, 20, 25, 30, 45, 60, 90, 120, 180, 240 and 300 minutes after epidural. Time to return to spontaneous movement was similar between GL (42.50 ± 6.12) and GR7.5 (69.2 ± 58.9). Time to return to ambulation was longer in GR7.5 (107.5 ± 79.3) than in GS (9.2 ± 3.8) and GR5 (32.5 ± 20.9). Time to recover deep sensitivity was longer in GR 7.5 (152.5 ± 89.2) than in GS (5.8 ± 2.0), GR5 (46.7 ± 46.3) and GL (52.5 ± 20.7). Time to return superficial sensitivity was longer in GR7.5 (205.0 ± 129.3) when compared to GS (7.5 ± 2.7), GL (72.5 ± 19.9) and GR5 (97.5 ± 55.1). Despite the early return of spontaneous movement, 0.75% ropivacaine is related to longer periods for muscle function recovery and longer sensory block than lidocaine and 0.5% ropivacaine.(AU)

Bloqueio do plexo braquial em um tamanduá-mirim (Tamandua tetradactyla) utilizando estimulador de nervos periféricos: relato de caso / Brachial plexus block in a tamanduá-mirim (Tamandua tetradactyla) using a peripheral nerve stimulator: Case report

Objetivou-se relatar a utilização do neurolocalizador para bloqueio do plexo braquial bilateral em tamanduá-mirim (Tamandua tetradactyla). O animal, pesando 5kg, atendido pelo Centro de Reabilitação de Animais Silvestres, foi encaminhado ao Hospital Veterinário da Universidade Federal de Mato Grosso do Sul para realização de exames complementares, sendo, posteriormente, encaminhado para cirurgia de osteossíntese de úmero e rádio/ulna esquerdo e colocação de fio de cerclagem em olécrano direito. O paciente foi pré-medicado com cetamina S (5mg/kg) + midazolam (0,15mg/kg), indução anestésica com propofol (5mg/kg) e manutenção anestésica com isoflurano, com o auxílio de máscara. Os parâmetros cardiovasculares e respiratórios foram monitorados durante todo o procedimento. Realizou-se o bloqueio do plexo braquial em ambos os membros utilizando-se estimulador de nervos periféricos. Os anestésicos locais empregados foram lidocaína 2% sem vasoconstritor (3mg/kg) + ropivacaína 0,75% sem vasoconstritor (1mg/kg). O bloqueio foi realizado primeiramente no membro torácico direito, e, após realização do procedimento cirúrgico, o mesmo bloqueio foi realizado no membro contralateral. O paciente teve recuperação tranquila ausente de vocalização e expressão álgica, e a soltura ocorreu após 120 dias.(AU)

The aim of this study was to report the use of the neurolocalizer for blocking the bilateral brachial plexus in tamanduá-mirin. The subject weighing 5kg was attended by the Center for the Rehabilitation of Wild Animals and referred to the Veterinary Hospital of the Federal University of Mato Grosso do Sul for complementary tests. Through the examinations, the need to perform humerus and left radius/ulna osteosynthesis and cerclagem placement on right olecranon was established. For surgery performance, the patient was pre-medicated with ketamine S (5mg/kg-1) associated to midazolam (0.15mg/kg-1) via intramuscular and intravenous propofol (5mg/kg-1) was used for induction. The anesthetic maintenance was performed with isoflurane, provided by an oxygen mask. Cardiovascular and respiratory parameters were monitored throughout the procedure. Brachial plexus block was performed in both limbs using peripheral nerve stimulator. The local anesthetics used were lidocaine without vasoconstrictor (3mg/kg-1) plus 0.75% ropivacaine without vasoconstrictor (1mg/kg-1). Blocking was first performed on the right thoracic limb followed by the surgical procedure. The same blockage was performed on the contralateral limb. The patient had a smooth recovery, without vocalization and pain. The release to its natural habitat occurred after 120 days.(AU)

Bloqueio do plexo braquial em um tamanduá-mirim (Tamandua tetradactyla) utilizando estimulador de nervos periféricos: relato de caso / Brachial plexus block in a tamanduá-mirim (Tamandua tetradactyla) using a peripheral nerve stimulator: Case report

Objetivou-se relatar a utilização do neurolocalizador para bloqueio do plexo braquial bilateral em tamanduá-mirim (Tamandua tetradactyla). O animal, pesando 5kg, atendido pelo Centro de Reabilitação de Animais Silvestres, foi encaminhado ao Hospital Veterinário da Universidade Federal de Mato Grosso do Sul para realização de exames complementares, sendo, posteriormente, encaminhado para cirurgia de osteossíntese de úmero e rádio/ulna esquerdo e colocação de fio de cerclagem em olécrano direito. O paciente foi pré-medicado com cetamina S (5mg/kg) + midazolam (0,15mg/kg), indução anestésica com propofol (5mg/kg) e manutenção anestésica com isoflurano, com o auxílio de máscara. Os parâmetros cardiovasculares e respiratórios foram monitorados durante todo o procedimento. Realizou-se o bloqueio do plexo braquial em ambos os membros utilizando-se estimulador de nervos periféricos. Os anestésicos locais empregados foram lidocaína 2% sem vasoconstritor (3mg/kg) + ropivacaína 0,75% sem vasoconstritor (1mg/kg). O bloqueio foi realizado primeiramente no membro torácico direito, e, após realização do procedimento cirúrgico, o mesmo bloqueio foi realizado no membro contralateral. O paciente teve recuperação tranquila ausente de vocalização e expressão álgica, e a soltura ocorreu após 120 dias.(AU)

The aim of this study was to report the use of the neurolocalizer for blocking the bilateral brachial plexus in tamanduá-mirin. The subject weighing 5kg was attended by the Center for the Rehabilitation of Wild Animals and referred to the Veterinary Hospital of the Federal University of Mato Grosso do Sul for complementary tests. Through the examinations, the need to perform humerus and left radius/ulna osteosynthesis and cerclagem placement on right olecranon was established. For surgery performance, the patient was pre-medicated with ketamine S (5mg/kg-1) associated to midazolam (0.15mg/kg-1) via intramuscular and intravenous propofol (5mg/kg-1) was used for induction. The anesthetic maintenance was performed with isoflurane, provided by an oxygen mask. Cardiovascular and respiratory parameters were monitored throughout the procedure. Brachial plexus block was performed in both limbs using peripheral nerve stimulator. The local anesthetics used were lidocaine without vasoconstrictor (3mg/kg-1) plus 0.75% ropivacaine without vasoconstrictor (1mg/kg-1). Blocking was first performed on the right thoracic limb followed by the surgical procedure. The same blockage was performed on the contralateral limb. The patient had a smooth recovery, without vocalization and pain. The release to its natural habitat occurred after 120 days.(AU)

Chemical desensitization, palmar neurectomy and post-surgical complications in horse: case report / Dessensibilização química, neurectomia palmar e complicações pós-cirúrgicas em equino: relato de caso

The aim is report the case of a stallion Quarter Horse with 12 years old, with podal chronic degenerative syndrome and partial ankylosis in metacarpal-phalangeal joint of the left forelimb, submitted to palmar chemical neurolysis with ammonium chloride 2 % , externalizing analgesic efficacy and return to sports activity for 40 days. After the period, was performed palmar neurectomy (NP), and with 110 days the horse had painful neuromas, underwent the new surgery. It is necessary to more reports and research involving the NP in equine evaluating: time and quality of analgesia; complications after NP; proprioceptive real risks to the animal and assessment of risk factors in the formation of neuromas

Objetiva-se relatar o caso de um garanhão da raça Quarto de Milha de 12 anos, portador de síndrome degenerativa crônica podal e anquilose parcial na articulação metacarpo-falângica do membro torácico esquerdo, submetido à neurólise química palmar com cloreto de amônio 2%, exteriorizando eficácia analgésica e retorno à atividade esportiva por 40 dias. Após o período, foi realizado neurectomia palmar (NP), sendo que com 110 dias o equino apresentou neuromas dolorosos, sendo submetido à nova cirurgia. Há necessidade de mais relatos e pesquisas envolvendo a NP em equino avaliando: tempo e qualidade de analgesia; complicações após NP; reais riscos proprioceptivos ao animal e avaliação de fatores de risco na formação de neuromas

Chemical desensitization, palmar neurectomy and post-surgical complications in horse: case report / Dessensibilização química, neurectomia palmar e complicações pós-cirúrgicas em equino: relato de caso

The aim is report the case of a stallion Quarter Horse with 12 years old, with podal chronic degenerative syndrome and partial ankylosis in metacarpal-phalangeal joint of the left forelimb, submitted to palmar chemical neurolysis with ammonium chloride 2 % , externalizing analgesic efficacy and return to sports activity for 40 days. After the period, was performed palmar neurectomy (NP), and with 110 days the horse had painful neuromas, underwent the new surgery. It is necessary to more reports and research involving the NP in equine evaluating: time and quality of analgesia; complications after NP; proprioceptive real risks to the animal and assessment of risk factors in the formation of neuromas(AU)

Objetiva-se relatar o caso de um garanhão da raça Quarto de Milha de 12 anos, portador de síndrome degenerativa crônica podal e anquilose parcial na articulação metacarpo-falângica do membro torácico esquerdo, submetido à neurólise química palmar com cloreto de amônio 2%, exteriorizando eficácia analgésica e retorno à atividade esportiva por 40 dias. Após o período, foi realizado neurectomia palmar (NP), sendo que com 110 dias o equino apresentou neuromas dolorosos, sendo submetido à nova cirurgia. Há necessidade de mais relatos e pesquisas envolvendo a NP em equino avaliando: tempo e qualidade de analgesia; complicações após NP; reais riscos proprioceptivos ao animal e avaliação de fatores de risco na formação de neuromas(AU)

Neurólise química acetabular em um cão com displasia coxofemoral / Acetabular chemical neurolysis in a dog with hip dysplasia: case report / Neurólisis química de la región acetabular en un perro con displasia de cadera

O objetivo deste artigo foi relatar o uso de uma suspensão etanólica neurolítica (CNE) para promover a dessensibilização química acetabular em um cão com displasia coxofemoral (DCF). Um macho dogo argentino apresentava havia 120 dias DCF não responsiva aos tratamentos conservadores de rotina, com dor e claudicação. A neurólise química acetabular foi realizada por meio do uso de uma CNE na região acetabular, em aplicação única. Os graus de sensibilidade (GS) e claudicação (GC) foram observados 24. 48, 72 e 96 horas e 15. 30, 60, 90, 120, 150 e 180 dias após o procedimento. O uso do CNE na inervação da cápsula articular do quadril promoveu a abolição da claudicação sete dias após a aplicação, ainda efetiva aos 180 dias. Essa técnica ainda requer estudos mais aprofundados, mas demonstra boas perspectivas como opção terapêutica no controle doloroso causado pela DCF.

We report the use of neurolytic ethanolic suspension (NES) to promote acetabular desensitization in a dog with caníne hip dysplasia (CHD). A male Dogo Argentino presented with a 120 days history of pain and lameness not responsive to conservative treatment. Acetabular chemical neurolysis was performed with a single application of NES The degrees of sensitivity and lameness were evaluated at 24, 48, 72 and 96 hours post-injection, and at 15, 30, 60, 90, 120, 150 and 180 days after the procedure. The use of NES in the hip joint capsule resulted in remission of lameness seven days after treatment, and was still effective at 180 days. This technique still requires further study, but demonstrates good prospects as a therapeutic option in the management of pain caused by Canlne Hip Dysplasia.

El presente artículo tuvo como objetivo relatar la utilización de una suspensión neurolítica de etanol (CNE) para la desensibilización química de la reglón acetabular en un perro con displasia coxofemoral (DCF). EI paciente era un macho de Dogo argentino con DCF que presentaba dolor y claudicación, y que desde hacía 120 dias no respondía a los tratamientos conservadores. Se realizó una neurólisis química mediante el uso de CNE en la región acetabular mediante aplicación única. Se observaron los diferentes grados de sensibilidad (GS) y de claudicación (GC) a las 24, 48, 72 y 96 horas. y a los 15, 30, 60, 90, 120, 150 y 180 dias después del procedimiento. El uso de CNE sobre la innervación de la cápsula articular de la cadera llevó a la desaparición de la claudicación a los 7 dias, siendo todavía efectiva a los 180 dias. Esta técnica aún requiere de estudios más profundos, pero muestra buenas perspectivas como opción terapéutica en el contrai del dolor provocado por la DCF.

Neurólise química acetabular em um cão com displasia coxofemoral / Acetabular chemical neurolysis in a dog with hip dysplasia: case report / Neurólisis química de la región acetabular en un perro con displasia de cadera

O objetivo deste artigo foi relatar o uso de uma suspensão etanólica neurolítica (CNE) para promover a dessensibilização química acetabular em um cão com displasia coxofemoral (DCF). Um macho dogo argentino apresentava havia 120 dias DCF não responsiva aos tratamentos conservadores de rotina, com dor e claudicação. A neurólise química acetabular foi realizada por meio do uso de uma CNE na região acetabular, em aplicação única. Os graus de sensibilidade (GS) e claudicação (GC) foram observados 24. 48, 72 e 96 horas e 15. 30, 60, 90, 120, 150 e 180 dias após o procedimento. O uso do CNE na inervação da cápsula articular do quadril promoveu a abolição da claudicação sete dias após a aplicação, ainda efetiva aos 180 dias. Essa técnica ainda requer estudos mais aprofundados, mas demonstra boas perspectivas como opção terapêutica no controle doloroso causado pela DCF.(AU)

We report the use of neurolytic ethanolic suspension (NES) to promote acetabular desensitization in a dog with caníne hip dysplasia (CHD). A male Dogo Argentino presented with a 120 days history of pain and lameness not responsive to conservative treatment. Acetabular chemical neurolysis was performed with a single application of NES The degrees of sensitivity and lameness were evaluated at 24, 48, 72 and 96 hours post-injection, and at 15, 30, 60, 90, 120, 150 and 180 days after the procedure. The use of NES in the hip joint capsule resulted in remission of lameness seven days after treatment, and was still effective at 180 days. This technique still requires further study, but demonstrates good prospects as a therapeutic option in the management of pain caused by Canlne Hip Dysplasia.(AU)

El presente artículo tuvo como objetivo relatar la utilización de una suspensión neurolítica de etanol (CNE) para la desensibilización química de la reglón acetabular en un perro con displasia coxofemoral (DCF). EI paciente era un macho de Dogo argentino con DCF que presentaba dolor y claudicación, y que desde hacía 120 dias no respondía a los tratamientos conservadores. Se realizó una neurólisis química mediante el uso de CNE en la región acetabular mediante aplicación única. Se observaron los diferentes grados de sensibilidad (GS) y de claudicación (GC) a las 24, 48, 72 y 96 horas. y a los 15, 30, 60, 90, 120, 150 y 180 dias después del procedimiento. El uso de CNE sobre la innervación de la cápsula articular de la cadera llevó a la desaparición de la claudicación a los 7 dias, siendo todavía efectiva a los 180 dias. Esta técnica aún requiere de estudios más profundos, pero muestra buenas perspectivas como opción terapéutica en el contrai del dolor provocado por la DCF.(AU)

Distribuição do nervo fibular comum em fetos de equinos e descrição anatômica de pontos para bloqueio anestésico / Distribution of common peroneal nerve in equine fetuses and anatomical description of sites for anesthetic block

Analisou-se a distribuição do nervo fibular comum em 30 fetos de equinos, sem raça definida, provenientes do acervo do Laboratório de Anatomia Animal da Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, que foram injetados e conservados em solução aquosa de formaldeído a 10%. Contatou-se que o referido nervo deriva do isquiático, divide-se em nervos fibulares superficial e profundo, distribuindo-se para os músculos extensores lateral e longo do dedo, fibular terceiro e tibial cranial. Traçando-se uma linha imaginária na região médio-lateral da tuberosidade do osso tíbia, o nervo fibular comum pode ser bloqueado em sua parte proximal, no terço caudal, entre o tendão de inserção do músculo bíceps femoral e a face lateral do músculo gastrocnêmio lateral (terço médio); e o nervo fibular profundo, na parte proximal da tíbia, crânio-distalmente ao fibular comum. O bloqueio do nervo fibular superficial pode ser realizado em duas regiões da tíbia: na proximal, considerando-se a linha imaginária, distalmente ao ponto citado para o fibular comum e caudalmente ao descrito para o fibular profundo; e na distal, na face lateral da articulação tíbio-társica, entre os tendões de inserção dos músculos extensores lateral e longo do dedo.(AU)

The distribution of the nervus fibularis communis was analyzed in 30 equine fetuses, mongrel, from the collection of the Animal Anatomy Laboratory at the School of Veterinary Medicine of Universidade Federal de Uberlândia, which were injected and stored in an aqueous solution of 10% formaldehyde. It was found that this nerve emerges from the ischiadicus, divides itself into nervus fibularis profundus and nervus fibularis superficialis distributing to the musculi extensor digitorum lateralis, extensor digitorum longus, fibularis tertius, and tibialis cranialis. Drawing an imaginary line in the medial-lateral region of the tuberositatis tibia, the nervus fibularis communis may be blocked in its proximal portion, in the caudal third, between the tendon of insertion of the biceps femoris and the lateral side of the musculus gastrocnemius (medium third); and the nervus fibularis profundus may be blocked in the proximal tibia, cranio-distally to the nervus fibularis communis. The block of nervus fibularis profundus may be performed in two regions of the tibia: proximal, considering the imaginary line, distal to the site referred to the nervus fibularis communis, and caudal to that described for the nervus fibularis profundus; and distal, on the lateral side of the tibiotarsal joint, between the tendons of insertion of the musculi extensor digitorum lateralis and extensor digitorum longus.(AU)

Anestesia peribulbar com ropivacaína como alternativa ao bloqueio neuromuscular para facectomia em cães / Peribulbar anesthesia with ropivacaine as an alternative to neuromuscular blocking agents for cataract surgery in dogs

Desenvolveu-se uma técnica de bloqueio peribulbar comparando-a à técnica de anestesia oftálmica com bloqueio neuromuscular parcial em cães submetidos à facectomia extracapsular. Doze cães, de diferentes raças, foram alocados em dois grupos (G1 e G2) e anestesiados com acepromazina (0,05mg/kg, IV) e propofol (5mg/kg, IV) e mantidos com isofluorano sob ventilação espontânea. Os cães do G1 receberam o bloqueio peribulbar com ropivacaína 0,75 por cento, e os do G2 o bloqueio neuromuscular parcial com brometo de pancurônio (0,01mg/kg, IV). Utilizaram-se, como parâmetros comparativos, escores de posicionamento do globo ocular, controle do reflexo oculocardíaco e pressão intraocular (mmHg). Foi possível propor uma técnica eficaz para cães baseando-se na técnica de bloqueio peribulbar posterior realizada no homem. Em ambos os grupos, o globo ocular permaneceu centralizado. Não ocorreram alterações eletrocardiográficas atribuídas ao reflexo oculocardíaco. Houve redução significativa da pressão intraocular em G1 após o bloqueio (10,7±0,6 e 14,7±0,6). Conclui-se que o bloqueio peribulbar proporcionou condições cirúrgicas apropriadas para a realização da facectomia, com a vantagem de promover bloqueio sensitivo do olho.(AU)

A peribulbar block technique was developed and its clinical efficacy was compared with neuromuscular blockade in dogs undergoing cataract surgery. Twelve dogs of different breeds were randomly and equally allocated in two groups. After given acepromazine (0.05mg/kg, IV), anesthesia was induced with propofol (5mg/kg, IV) and maintained with isoflurane in oxygen during spontaneous breathing. A peribulbar block with 0.75 percent ropivacaine was performed in G1 dogs while partial neuromuscular blockade with pancuronium (0.01mg/kg IV) was provided in G2 dogs. Globe position scores, oculocardiac reflex, and intra-ocular pressure (mmHg) were evaluated at pre-defined intervals during surgery. Peribulbar blocks were successful performed according to posterior peribulbar block described in humans. In both groups, the globe was centralized and globe position scores did not differ between groups. The intra-ocular pressure was significantly lower in G1 after the block (10.7±0.6 vs 14.7±0.6). There were no electrocardiographycal changes attributed to the oculocardiac reflex. In conclusion, satisfactory surgical conditions were provided by the peribulbar block. This technique can be used as an alternative to the use of neuromuscular blocking agents in dogs undergoing cataract surgery, with the advantage of providing analgesia of the eye.(AU)

Uso de fármacos neurolíticos em equídeos de tração carroceiros? procedimento ilícito ou promoção de bem-estar animal? / Use of neurolytic drugs in traction wagon horses: iIIicit procedure or promotion of animal welfare? / El uso de drogas neurolíticas en caballos de tracción carretilleros: procedimiento ilegal o promoción de bienestar animal?

Nas grandes cidades, a utilização do equídeo na tração de carroças para recolhimento de lixo e entulhos tem aumentado, sendo os animais considerados como ferramentas de trabalho, cuja saúde e longevidade devem ser observadas. Essa realidade confronta com os princípios bioéticos, de bem-estar e direito animal, desrespeitando as cinco liberdades. O objetivo deste artigo é conscientizar o leitor sobre a importância das claudicações e a consequente interferência causada na esfera física e comportamental dos equídeos carroceiros, elucidando sobre as técnicas de neurólise química para as síndromes degenerativas crônicas desses animais, as discutindo com foco na bioética e bem-estar animal. Conclui-se que o uso criterioso de neurolíticos não é o procedimento ideal para o sequídeos carroceiros com afecções degenerativas crônicas, que deveriam aposentar-se da atividade de tração, mas também não deve ser visto como procedimento ilícito, mas sim como forma imediata e indireta de promover bem estar animal para esses animais que sofrem muito com as claudicações e a dor crônica.

In big cities, the use of the animal traction in carts for recollection of garbage and debris has increased,and the animais considered as work tools, whose health and longevity must be observed. This reality is confrontedwith the bioethical principies, the animal welfare and animal law, disrespecting the five freedoms. The aim of thisarticle is realize the reader about the importance of lameness and the consequent interference caused in physics andbehavioral spheres of the cart equids, elucidating on the techniques of chemical neurolysis for degenerative syndromeschronicles of these animais, the discussing with a focus on ethics and animal welfare. It is concluded that the judicioususe of neurolytic is not the ideal procedure to the cart equids with chronics degenerative affections, who should retirefrom the activity of traction, but also should not be seen as illegal procedure, but as immediate and indirect topromote animal welfare for those animais that are suffering a lot with the lameness and chronic pain.

En las grandes ciudades, el uso de la de caballos carretilleros para Ia recolección de basura y escombrosse ha incrementado, y los animales que sirven como herramientas de trabajo, cuya salud y Ia longevidad se debenobservar. Esta realidad se enfrenta aios principios bioéticos, bienestar o derechos de los animales, sin tener encuenta Ias cinco libertades. EI propósito de este artículo es el de educar allector sobre Ia importancia de Ia cojera yIa interferencia consecuente causado esfera física y conductual de los caballos, Ia aclaración de Ias técnicas neurolisisquímica para síndromes degenerativos crónicos, con el argumento se centra en Ia bioética y así bienestar animal.Llegamos a Ia conclusión de que el uso juicioso de neurolítico no es el procedimiento ideal para los caballos carretilleroscon enfermedades crónico-degenerativas, que deben retirarse actividad empate, pero no debe ser visto como unprocedimiento ilegal, pero a medida inmediata e indirectamente promover el bienestar animal para estos animalessufren mucho con cojera y dolor crónico.

Uso de fármacos neurolíticos em equídeos de tração carroceiros? procedimento ilícito ou promoção de bem-estar animal? / Use of neurolytic drugs in traction wagon horses: iIIicit procedure or promotion of animal welfare? / El uso de drogas neurolíticas en caballos de tracción carretilleros: procedimiento ilegal o promoción de bienestar animal?

Nas grandes cidades, a utilização do equídeo na tração de carroças para recolhimento de lixo e entulhos tem aumentado, sendo os animais considerados como ferramentas de trabalho, cuja saúde e longevidade devem ser observadas. Essa realidade confronta com os princípios bioéticos, de bem-estar e direito animal, desrespeitando as cinco liberdades. O objetivo deste artigo é conscientizar o leitor sobre a importância das claudicações e a consequente interferência causada na esfera física e comportamental dos equídeos carroceiros, elucidando sobre as técnicas de neurólise química para as síndromes degenerativas crônicas desses animais, as discutindo com foco na bioética e bem-estar animal. Conclui-se que o uso criterioso de neurolíticos não é o procedimento ideal para o sequídeos carroceiros com afecções degenerativas crônicas, que deveriam aposentar-se da atividade de tração, mas também não deve ser visto como procedimento ilícito, mas sim como forma imediata e indireta de promover bem estar animal para esses animais que sofrem muito com as claudicações e a dor crônica.(AU)

In big cities, the use of the animal traction in carts for recollection of garbage and debris has increased,and the animais considered as work tools, whose health and longevity must be observed. This reality is confrontedwith the bioethical principies, the animal welfare and animal law, disrespecting the five freedoms. The aim of thisarticle is realize the reader about the importance of lameness and the consequent interference caused in physics andbehavioral spheres of the cart equids, elucidating on the techniques of chemical neurolysis for degenerative syndromeschronicles of these animais, the discussing with a focus on ethics and animal welfare. It is concluded that the judicioususe of neurolytic is not the ideal procedure to the cart equids with chronics degenerative affections, who should retirefrom the activity of traction, but also should not be seen as illegal procedure, but as immediate and indirect topromote animal welfare for those animais that are suffering a lot with the lameness and chronic pain.(AU)

En las grandes ciudades, el uso de la de caballos carretilleros para Ia recolección de basura y escombrosse ha incrementado, y los animales que sirven como herramientas de trabajo, cuya salud y Ia longevidad se debenobservar. Esta realidad se enfrenta aios principios bioéticos, bienestar o derechos de los animales, sin tener encuenta Ias cinco libertades. EI propósito de este artículo es el de educar allector sobre Ia importancia de Ia cojera yIa interferencia consecuente causado esfera física y conductual de los caballos, Ia aclaración de Ias técnicas neurolisisquímica para síndromes degenerativos crónicos, con el argumento se centra en Ia bioética y así bienestar animal.Llegamos a Ia conclusión de que el uso juicioso de neurolítico no es el procedimiento ideal para los caballos carretilleroscon enfermedades crónico-degenerativas, que deben retirarse actividad empate, pero no debe ser visto como unprocedimiento ilegal, pero a medida inmediata e indirectamente promover el bienestar animal para estos animalessufren mucho con cojera y dolor crónico.(AU)

Estudo comparativo experimental da injeção perineural do álcool benzílico 0, 75% e do álcool etílico absoluto nos nervos palmares de eqüinos / Experimental comparative study of perineural injection of benzyl alcohol 0, 75% and absolute ethyl alcohol in equine palmar nerves

Foi estudada a neurólise química dos nervos Palmares em 10 eqüinos. Usando-se uma ferradura especial para induzir claudicação, a locomoção avaliada ao passo e trote e os graus foram registrados antes e após a injeção perineural do álcool benzílico 0,75% (Grupo A) e o álcool etílico absoluto (Grupo B). Os testes mostraram que ambos os neurolíticos dessensibilizaram completamente a sola dos animais a partir de 30 dias, assim permanecendo até o 150º dia nos animais do Grupo A, quando ocorreu retorno progressivo da sensibilidade. Jáno Grupo B, aos 180 dias, a sensibilidade permanecia ausente. A análise histopatológica revelou que nos nervos infiltrados com álcool benzílico 0,75% prevaleceram lesões próprias de axonotemese,sugerindo tendência de regeneração e restabelecimento da condução nervosa, enquanto que nos nervos infiltrados com álcool etílico absoluto, prevaleceram lesões simuladoras de neurotemese, com degeneração nervosa permanente. Concluiu-se que os álcoois utilizados foram eficientes bloqueadores temporários ou permanentes dos nervos Palmares em eqüinos.(AU)

The clinical and histopathological effects of two alcoholic neurolytics were studied in horses. Normal horses were shod with a designed shoe adaptted with 5 screws to produce solar pain. After gait and lameness score analysis, the palmar nerve of 5 horses was injected with 5 ml of 0,75% benzyl alcohol (Group A) and 5 horses were injected with 5 ml of absolute ethyl alcohol (Group B). The animals were submitted to regular lameness evaluation and solar sensibility tests during next six months. The solar sensitivity returned 5 months latter in the group injected with benzyl alcohol 0,75%, while in the group injected with absolute ethyl alcohol, the sole was still desensitized 6 months latter. The histopathological findings showed that the nerve injected with benzyl alcohol 0,75%, resulted inaxonotmesis, characterized by axonal nerve degeneration, with possibilities for the nerve conduction recovery. The perineural injectionof ethyl alcohol absolute, resulted in neurotmesis with difficult nerve regeneration. It was concluded that chemical neurolysis with alcoholis an option for temporary or permanent nerve blocks in horses.(AU)