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Schuch LF, Campagnol D, Schmidt TR, Michel CHT, Garcez TNA, Danilevicz CK, Castilho RM, Martins MAT, Vargas PA, Martins MD. Proposal of a secure and efficient protocol for a murine oral carcinogenesis model induced by 4-nitroquinoline-1-oxide (4NQO). Pathol Res Pract 2023; 247:154547. [PMID: 37244052 DOI: 10.1016/j.prp.2023.154547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 05/29/2023]
Abstract
An important rat model using the chemical carcinogen 4-nitroquinoline-1-oxide (4NQO) has been described for the study of the process of oral carcinogenesis. This model replicates the gradual progression seen in oral carcinoma patients. However, due to its high level of toxicity, its use in fundamental research is challenging. Here, we propose a secure and efficient modified protocol based on a lower dose of 4NQO concentration as well as an increased water supply and hypercaloric diet, in order to reduce the damage caused to the animals during the process of oral carcinogenesis. Twenty-two male Wistar rats were exposed to 4NQO, evaluated clinically once a week and euthanized at 12 and 20 weeks for histopathological analysis. The protocol involves a staggered dose of 4NQO up to a concentration of 25 ppm, associated with two days of pure water, a 5% glucose solution once a week and a hypercaloric diet. This modified protocol prevents the immediate consequences of the carcinogen. At week 7, all animals displayed clinically evident tongue lesions. From a histological perspective, after 12 weeks of 4NQO exposure, 72.7% of the animals developed epithelial dysplasia and 27.3% developed in situ carcinoma. In the group exposed for 20 weeks, epithelial dysplasia and in situ carcinoma were diagnosed in one case each, whereas invasive carcinoma was diagnosed in 81.8% of the cases. Nonsignificant modification of animal's behavior and weight was observed. This new proposed 4NQO protocol was secure and effective for studying oral carcinogenesis and can be used to conduct lengthy investigations.
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Affiliation(s)
- Lauren Frenzel Schuch
- Oral Diagnosis Departament, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil
| | - Daniela Campagnol
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Tuany Rafaeli Schmidt
- Departament of Oral Pathology, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Carolina Horn Troian Michel
- Departament of Edodontics, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Tuane Nerissa Alves Garcez
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Chris Krebs Danilevicz
- Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Rogerio Moraes Castilho
- Michigan University, School of Dentistry, Department of Periodontics and Oral Medicine, Ann Arbor, MI, United States
| | - Marco Antonio Trevizani Martins
- Departament of Oral Pathology, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Departament, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil
| | - Manoela Domingues Martins
- Oral Diagnosis Departament, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil; Departament of Oral Pathology, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
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Poletto E, Pinheiro CV, Schuh RS, Campagnol D, Cioato M, Garcez TNA, Martins GR, Matte U, Baldo G. Biodistribution of Transplanted Hematopoietic Precursor Cells Injected Through Different Administration Routes in Newborn Mice. Hum Gene Ther 2021; 32:495-505. [PMID: 33632008 DOI: 10.1089/hum.2019.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hematopoietic stem cell transplantation has been studied for several decades now, mostly as a treatment for malignancies and hematological diseases but also for genetic metabolic disorders. Since many diseases that could be potentially treated with this approach develop early in life, studies of cell transplantation in newborn mice are needed, especially for gene therapy protocols. However, the small size of pups restricts the possibilities for routes of administration, and those available are normally technically challenging. Our goal was to test different routes of administration of Lin- cells in 2-day-old mice: intraperitoneal, intravenous through temporal vein (TV), and intravenous through retro-orbital (RO) sinus. Routes were evaluated by their easiness of execution and their influence in the biodistribution of cells in the short (48 h) and medium (30 days) term. In either 48 h or 30 days, all three routes presented similar results, with cells going mostly to bone marrow, liver, and spleen in roughly the same number. RO injection resulted in quick distribution of cells to the brain, suggesting better performance than the others. Rate of failure was higher for the TV route, which was also the hardest to execute, whereas the other two were considered easier. In conclusion, TV was the hardest to perform and all routes seemed to demonstrate similar results for cell biodistribution. In particular, the RO injection results in quicker biodistribution of cells to the brain, which is particularly important in the study of genetic metabolic disorders with a neurological component.
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Affiliation(s)
- Edina Poletto
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology
| | | | | | - Daniela Campagnol
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Marta Cioato
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Tuane Nerissa Alves Garcez
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Ursula Matte
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology
| | - Guilherme Baldo
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology.,Postgraduate Program in Physiology; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Rangel JPP, Monteiro ER, Bitti FS, Junior JSN, Campagnol D. Hemodynamic effects of incremental doses of acepromazine in isoflurane-anesthetized dogs. Vet Anaesth Analg 2020; 48:167-173. [PMID: 33388251 DOI: 10.1016/j.vaa.2020.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 11/07/2020] [Accepted: 11/19/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To evaluate the effects of incremental doses of acepromazine on hemodynamics in isoflurane-anesthetized dogs. STUDY DESIGN Prospective, experimental study. ANIMALS Healthy, adult, mixed-breed dogs (two male and four female) weighing 16.8 ± 5.1 kg (mean ± standard deviation). METHODS Dogs were anesthetized with propofol (7 mg kg-1) intravenously (IV) and isoflurane. Thermodilution and arterial catheters were placed for hemodynamic monitoring and arterial blood sampling for blood gas analysis. Baseline measurements were performed with stable expired concentration of isoflurane (Fe'Iso) at 1.8%. Each dog was then administered four incremental acepromazine injections (10, 15, 25 and 50 μg kg-1) IV, and measurements were repeated 20 minutes after each acepromazine injection with Fe'Iso decreased to 1.2%. The four acepromazine injections resulted in cumulative doses of 10, 25, 50 and 100 μg kg-1 (time points ACP10, ACP25, ACP50 and ACP100, respectively). RESULTS Compared with baseline, cardiac index (CI) increased significantly by 34%, whereas systemic vascular resistance index (SVRI) decreased by 25% at ACP50 and ACP100. Arterial oxygen content (CaO2) was significantly lower than baseline after all acepromazine injections (maximum decreases of 11%) and was lower at ACP50 and ACP100 than at ACP10. No significant change was found in heart rate, stroke index, oxygen delivery index and systolic, mean and diastolic blood pressures. Hypotension (mean arterial pressure < 60 mmHg) was observed in one dog at baseline, ACP10, ACP25 and ACP100, and in two dogs at ACP50. CONCLUSIONS AND CLINICAL RELEVANCE Compared with isoflurane alone, anesthesia with acepromazine-isoflurane resulted in increased CI and decreased SVRI and CaO2 values. These effects were dose-related, being more pronounced at ACP50 and ACP100. Under the conditions of this study, acepromazine administration did not change blood pressure.
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Affiliation(s)
- Julia P P Rangel
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Eduardo R Monteiro
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil.
| | - Flavia S Bitti
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Juarez S N Junior
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Daniela Campagnol
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
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Monteiro ER, Rabello TA, Rangel JPP, Nunes JS, Freire CD, Campagnol D. Effects of 3 morphine doses, in combination with acepromazine, on sedation and some physiological parameters in dogs. Can J Vet Res 2019; 83:235-240. [PMID: 31308597 PMCID: PMC6587885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/14/2018] [Indexed: 06/10/2023]
Abstract
This study evaluated the effects of 3 morphine doses combined with acepromazine, on sedation and physiological parameters in 5 clinically healthy dogs. Four treatments were administered intramuscularly in a randomized, blinded, crossover design: acepromazine, 0.05 mg/kg, alone (ACP) and acepromazine plus morphine at doses of 0.25, 0.5, and 1.0 mg/kg body weight (BW) (AM0.25, AM0.5, and AM1.0, respectively). Sedation scores and cardiorespiratory variables were evaluated for 120 min after drug administration. The sedation scores were significantly higher with the AM0.25 and AM1.0 treatments than with the ACP treatment. At 30 min the scores were 36% to 66% higher with AM1.0 than with AM0.25 and AM0.5, respectively, but these differences were not significant. The physiological variables remained acceptable for dogs. The results of this study do not support the use of AM0.5 over AM0.25 to improve sedation in dogs, but they do indicate that sedation may be greater with AM1.0 than with AM0.25 and AM0.5. Studies with a greater number of samples are warranted to confirm this statement.
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Affiliation(s)
- Eduardo R Monteiro
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Thiago A Rabello
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Julia P P Rangel
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Juarez S Nunes
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Cesar D Freire
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Daniela Campagnol
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
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Monteiro BS, Santos BSD, Almeida BLD, Hiura E, Fiorio WAB, Valdetaro GP, Gonçalves DV, Silva CS, Champion T, Campagnol D. Adipose tissue derived mesenchymal stem cell transplantation in the treatment of ischemia/reperfusion induced acute kidney injury in rats. Application route and therapeutic window1. Acta Cir Bras 2019; 33:1016-1026. [PMID: 30517328 DOI: 10.1590/s0102-865020180110000008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 10/25/2018] [Indexed: 01/23/2023] Open
Abstract
PURPOSE To evaluate renal repair in rats who had renal infarction induced by the obstruction of blood flow in the renal artery and were treated with transplantation of adipose tissue derived mesenchymal stem cell. METHODS 16-week-old Wistar rats (n=72) were used, submitted to celiotomy and had of the renal artery and vein clipped for 24 hours. The animals were randomly assigned to 10 experimental homogeneous groups, corresponding to the treatments with phosphate-buffered saline (PBS) or adipose tissue derived mesenchymal stem cell (ADSC), duration of application (24 or 48 hours), and site of transplantation (lateral vein of the tail or intrarenal). After the treatments were performed, at 8 and 31 days, four animals in each group were subjected to left nephrectomy for histological studies. RESULTS Histologically, a higher amount of cell debris and tubules devoid of the epithelium and a higher degree of necrosis were observed in the groups treated with PBS, as opposed to a low degree of necrosis and higher tubular vascularization in the groups treated with ADSC, particularly in the group treated with intrarenal ADSC 48 hours after injury. CONCLUSION The transplantation of ADSC positively contributed to the replacement of necrotic tissue by renal tubular cells, vascularization of the renal parenchyma, and restoration of the organ function.
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Affiliation(s)
- Betânia Souza Monteiro
- Full Professor, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, Universidade Vila Velha (UVV), Brazil. Conception and design of the study, manuscript writing, critical revision, final approval
| | - Bianka Souza Dos Santos
- Veterinary Medical, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, UVV, Vila Velha-ES, Brazil. Technical procedures, acquisition of data, manuscript preparation and writing
| | - Bruna Lopes de Almeida
- Veterinary Medical, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, UVV, Vila Velha-ES, Brazil. Technical procedures, acquisition of data, manuscript preparation and writing
| | - Emy Hiura
- Veterinary Medical, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, UVV, Vila Velha-ES, Brazil. Technical procedures, acquisition of data, manuscript preparation and writing
| | - Wagner Alexey Back Fiorio
- Veterinay Medical, Advanced Imaging Center and Veterinary Pathology, Vila Velha-ES, Brazil. Histopathological examinations
| | - Gisele Pereira Valdetaro
- Veterinary Medical, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, UVV, Vila Velha-ES, Brazil. Technical procedures, acquisition of data, manuscript preparation and writing
| | - Dariele Vieira Gonçalves
- Veterinary Medical, Stem Cell and Cellular Therapy Laboratory, Animal Science Program, UVV, Vila Velha-ES, Brazil. Technical procedures, acquisition of data, manuscript preparation and writing
| | - Caroline Saraiva Silva
- Veterinay Medical, PetScan Diagnoses Center, Vila Velha-ES, Brazil. Imagens examinations
| | - Tatiana Champion
- Assistant Professor, Veterinary Department, Universidade Federal da Fronteira Sul (UFFS), Realeza-PR, Brazil. Statistics analysis, critical revision, final approval
| | - Daniela Campagnol
- Veterinay Medical, Animal Experimentation Division, Clinical Hospital, Universidade Federal do Rio Grande do Sul (UFRS), Porto Alegre-RS, Brazil. Substantive scientific and intellectual contributions to the study, critical revision
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Souza PC, Santos EBD, Motta GL, Bona SR, Schaefer PG, Campagnol D, Bortolini T, Corso CO. Combined effects of melatonin and topical hypothermia on renal ischemia-reperfusion injury in rats. Acta Cir Bras 2018; 33:197-206. [PMID: 29668777 DOI: 10.1590/s0102-865020180030000001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 02/28/2018] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate whether their combination was more effective than either alone in decreasing renal damage due to ischemia/reperfusion (I/R) injury in rats. METHODS Thirty-two Wistar rats were assigned to four groups. Following right nephrectomy, their left kidneys were subjected to warm ischemia (IR), cold ischemia (TH+IR), intraperitoneal injection of 10 mg/kg melatonin (MEL+IR), or injection of 10 mg/kg melatonin followed by cold ischemia (MEL+TH+IR). Eight randomly assigned right kidneys constituted the control group. After 240 min of reperfusion, left nephrectomy was performed for histopathological evaluation, lipid peroxidation, and measurement of antioxidant enzyme activity. Serum was collected to measure urea and creatinine concentrations. RESULTS Histopathological damage induced by ischemia and reperfusion was more attenuated in the MEL+TH+IR group than in the MEL+IR and TH+IR groups (p<0.037). Superoxide dismutase activity was significantly higher (p<0.029) and creatinine (p<0.001) and urea (p<0.001) concentrations were significantly lower in the MEL+TH+IR group than in the MEL+IR and TH+IR groups. CONCLUSION The combination of melatonin (MEL) and topical hypothermia (TH) better protects against renal I/R injury than does MEL or TH alone.
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Affiliation(s)
- Pablo Cambeses Souza
- Postgraduate Program in Medicine: Surgical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Guilherme Lang Motta
- Postgraduate Program in Medicine: Surgical Sciences, UFRGS, Porto Alegre, RS, Brazil
| | - Silvia Regina Bona
- Laboratory of Experimental Gastroenterology and Hepatology, HCPA, Porto Alegre, RS, Brazil
| | | | | | - Tiago Bortolini
- Postgraduate Program in Medicine: Surgical Sciences, UFRGS, Porto Alegre, RS, Brazil
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Medeiros LQ, Gozalo-Marcilla M, Taylor PM, Campagnol D, de Oliveira FA, Watanabe MJ, de Araujo Aguiar AJ. Sedative and cardiopulmonary effects of dexmedetomidine infusions randomly receiving, or not, butorphanol in standing horses. Vet Rec 2017; 181:402. [PMID: 28822974 DOI: 10.1136/vr.104359] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 06/22/2017] [Accepted: 07/24/2017] [Indexed: 11/04/2022]
Abstract
Dexmedetomidine (DEX) alone, or combined with butorphanol (BUT), may be administered by constant rate infusions (CRIs) in standing horses. This blinded, randomised, crossover study in six healthy adult horses aimed to determine the sedative and cardiopulmonary effects of DEX (dexmedetomidine (3.5 µg/kg+5 µg/kg/hour CRI) and DEX/BUT (dexmedetomidine (3.5 µg/kg+3.5 µg/kg/hour CRI) and butorphanol (20 µg/kg+24 µg/kg/hour CRI)). Head height above ground (HHAG), ataxia, responses to tactile/auditory stimuli and cardiopulmonary variables were recorded before, at 5/15/30/60/90 minutes and after CRIs terminated (15/30/60 minutes). Repeated measures analysis of variance with Tukey-Kramer test were used for cardiopulmonary values (mean±SD) and HHAG reduction (per cent), and Friedman's and Dunn's for non-parametric data (P<0.05). Maximum HHAG reductions of 54 per cent (DEX) and 58 per cent (DEX/BUT) occurred at 15 minutes, with ataxia for 15 minutes in both treatments. Responses to stimuli were reduced for 30 minutes in both treatments, and auditory up to 60 minutes in DEX. Cardiopulmonary effects typical of α2-agonists were observed, with no differences between treatments. At the doses and rates reported here, both regimens provided clinically sufficient sedation for only 30 minutes.
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Affiliation(s)
- Luíza Quintão Medeiros
- Graduate Program in Anaesthesiology, Medical School of Botucatu, UNESP-Univ Estadual Paulista, Botucatu-SP, Brazil
| | - Miguel Gozalo-Marcilla
- Department of Veterinary Surgery and Anaestesiology, Faculty of Veterinary Medicine and Animal Science, UNESP - Univ Estadual Paulista, Botucatu-SP, Brazil
| | | | - Daniela Campagnol
- Graduate Program in Anaesthesiology, Medical School of Botucatu, UNESP-Univ Estadual Paulista, Botucatu-SP, Brazil
| | - Flávia Augusta de Oliveira
- Graduate Program in Anaesthesiology, Medical School of Botucatu, UNESP-Univ Estadual Paulista, Botucatu-SP, Brazil
| | - Marcos Jun Watanabe
- Department of Veterinary Surgery and Anaestesiology, Faculty of Veterinary Medicine and Animal Science, UNESP - Univ Estadual Paulista, Botucatu-SP, Brazil
| | - Antonio José de Araujo Aguiar
- Department of Veterinary Surgery and Anaestesiology, Faculty of Veterinary Medicine and Animal Science, UNESP - Univ Estadual Paulista, Botucatu-SP, Brazil
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Bitti FS, Campagnol D, Rangel JPP, Nunes Junior JS, Loureiro B, Monteiro ER. Effects of three methadone doses combined with acepromazine on sedation and some cardiopulmonary variables in dogs. Vet Anaesth Analg 2017; 44:237-245. [DOI: 10.1016/j.vaa.2016.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 03/18/2016] [Accepted: 04/15/2016] [Indexed: 11/30/2022]
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Simões CR, Monteiro ER, Rangel JPP, Nunes-Junior JS, Campagnol D. Effects of a prolonged infusion of fentanyl, with or without atropine, on the minimum alveolar concentration of isoflurane in dogs. Vet Anaesth Analg 2015; 43:136-44. [PMID: 26058733 DOI: 10.1111/vaa.12282] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 03/07/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To evaluate the effect of a prolonged constant rate infusion (CRI) of fentanyl on the minimum alveolar concentration (MAC) of isoflurane (ISOMAC ) and to establish whether concurrent atropine administration influences ISOMAC in dogs. STUDY DESIGN Prospective, crossover study. ANIMALS Six healthy dogs weighing 13.0 ± 4.1 kg. METHODS Dogs were anesthetized with isoflurane under conditions of normocapnia and normothermia. Arterial blood pressure was monitored invasively. Each dog was administered two treatments, on different occasions, in a crossover design. The dogs were administered intravenously (IV) an atropine bolus 0.02 mg kg(-1) and CRI at 0.04 mg kg(-1) hour(-1) (fentanyl-atropine treatment) or no atropine (fentanyl treatment). For each dog, baseline ISOMAC was measured in duplicate using a tail clamp technique. Subsequently, all dogs were administered a fentanyl bolus (5 μg kg(-1)) and CRI (9 μg kg(-1) hour(-1)) IV, and ISOMAC was re-determined at 120 and 300 minutes after initiation of the fentanyl CRI. RESULTS Baseline ISOMAC values in the fentanyl and fentanyl-atropine treatments were 1.38 ± 0.16% and 1.39 ± 0.14%, respectively. Fentanyl significantly decreased the ISOMAC by 50 ± 9% and 47 ± 13% after 120 minutes and by 51 ± 14% and 50 ± 9% after 300 minutes (p < 0.001) in the fentanyl and fentanyl-atropine treatments, respectively. Compared with baseline, heart rate decreased significantly in the fentanyl treatment by 35% and 43% at 120 and 300 minutes, respectively. In the fentanyl-atropine treatment, heart rate did not change significantly over time. In both treatments, systolic arterial pressure increased from baseline after fentanyl. CONCLUSIONS AND CLINICAL RELEVANCE In this study, fentanyl reduced the ISOMAC by approximately 50%. The ISOMAC remained stable throughout the 300 minute CRI of fentanyl, suggesting no cumulative effect of the opioid. Atropine did not influence ISOMAC in dogs.
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Affiliation(s)
- Clarissa R Simões
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Eduardo R Monteiro
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | - Julia P P Rangel
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
| | | | - Daniela Campagnol
- School of Veterinary Medicine, University of Vila Velha, Vila Velha, ES, Brazil
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Teixeira RCR, Monteiro ER, Campagnol D, Coelho K, Bressan TF, Monteiro BS. Effects of tramadol alone, in combination with meloxicam or dipyrone, on postoperative pain and the analgesic requirement in dogs undergoing unilateral mastectomy with or without ovariohysterectomy. Vet Anaesth Analg 2013; 40:641-9. [DOI: 10.1111/vaa.12080] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 04/23/2013] [Indexed: 11/27/2022]
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Monteiro ER, Campagnol D, Bajotto GC, Simões CR, Rassele AC. Effects of 8 hemodynamic conditions on direct blood pressure values obtained simultaneously from the carotid, femoral and dorsal pedal arteries in dogs. J Vet Cardiol 2013; 15:263-70. [PMID: 24262114 DOI: 10.1016/j.jvc.2013.07.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 07/02/2013] [Accepted: 07/25/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVES This study aimed to evaluate the effect of 8 hemodynamic conditions on blood pressure measurements taken from the carotid, femoral and dorsal pedal arteries of dogs. ANIMALS Six healthy dogs. METHODS During isoflurane anesthesia, catheters were introduced into the carotid, femoral and dorsal pedal arteries of dogs to allow simultaneous monitoring of direct blood pressure in each artery. The dogs were submitted to 8 hemodynamic conditions induced by combining changes in heart rate (bradycardia, normocardia, tachycardia) with changes in blood pressure (hypotension, normotension, hypertension). Values obtained from each arterial catheter were compared and agreement between central (carotid) and peripheral (femoral and dorsal pedal) values were analyzed by the Bland-Altman method. RESULTS During hypotensive conditions, systolic arterial pressure (SAP) was lower in the femoral and dorsal pedal arteries compared to the carotid artery whereas during normotensive and hypertensive conditions, SAP was higher in peripheral arteries. During hypotensive states, increases in heart rate resulted in greater bias between central and peripheral SAP whereas during normotensive states, the bias decreased as heart rate increased. Mean and diastolic arterial pressures were lower in the femoral and dorsal pedal arteries than in the carotid artery during most hemodynamic conditions. CONCLUSIONS In healthy anesthetized dogs, invasive blood pressure measurements in peripheral arteries may differ significantly from measurements in a central artery. The greatest differences were observed in SAP and the magnitude of differences between central and peripheral blood pressure measurements varied according to the dog's hemodynamic condition.
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Affiliation(s)
- Eduardo R Monteiro
- University of Vila Velha, School of Veterinary Medicine, Rua Comissário José Dantas de Melo, 21, Boa Vista, CEP 29102-770 Vila Velha, ES, Brazil.
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Campagnol D, Teixeira-Neto FJ, Monteiro ER, Restitutti F, Minto BW. Effect of intraperitoneal or incisional bupivacaine on pain and the analgesic requirement after ovariohysterectomy in dogs. Vet Anaesth Analg 2012; 39:426-30. [DOI: 10.1111/j.1467-2995.2012.00728.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fernandes de Souza JF, Raposo Monteiro E, Campagnol D, Ramos RC, Frasson AMF. Evaluation of Nociception, Sedation, and Cardiorespiratory Effects of a Constant Rate Infusion of Xylazine Alone or in Combination with Lidocaine in Horses. J Equine Vet Sci 2012. [DOI: 10.1016/j.jevs.2011.11.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Campagnol D, Teixeira-Neto FJ, Peccinini RG, Oliveira FA, Alvaides RK, Medeiros LQ. Comparison of the effects of epidural or intravenous methadone on the minimum alveolar concentration of isoflurane in dogs. Vet J 2012; 192:311-5. [DOI: 10.1016/j.tvjl.2011.08.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 08/10/2011] [Accepted: 08/16/2011] [Indexed: 10/17/2022]
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Monteiro ER, Neto FJT, Campagnol D, Garofalo NA, Alvaides RK. Hemodynamic effects in dogs anesthetized with isoflurane and remifentanil-isoflurane. Am J Vet Res 2010; 71:1133-41. [DOI: 10.2460/ajvr.71.10.1133] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sá P, Texeira Neto F, Campagnol D, França R, Moreira M. Efeitos do modo ventilatório sobre variáveis hemogasométricas em equinos submetidos à mudança de decúbito durante a anestesia geral inalatória com halotano. ARQ BRAS MED VET ZOO 2010. [DOI: 10.1590/s0102-09352010000300008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Compararam-se os efeitos da ventilação espontânea (V E) e controlada (V C) em equinos submetidos à mudança de decúbito durante anestesia. Dezesseis animais foram equitativamente divididos em dois grupos: V E e V C. Os procedimentos cirúrgicos foram iniciados com os animais em decúbito lateral esquerdo (DLE) e, após 75 minutos, os animais foram reposicionados em decúbito lateral direito (DLD). Análises hemogasométricas do sangue arterial foram realizadas após 30 e 75 minutos com os animais posicionados em cada decúbito (M1 e M2 no DLE e M3 e M4 no DLD, respectivamente). Durante a V E, observaram-se hipercapnia (PaCO2 >45mmHg), acidose respiratória (pH <7,35), redução significativa da oxigenação sanguínea após 75min da mudança de decúbito (M4: 205,8±124,7mmHg) em relação aos valores de PaO2 observados antes da mudança de posicionamento (M1: 271,8±84,8mmHg). A Vc foi associada a valores de PaCO2 e pH mais próximos da normalidade bem como resultou em valores de PaO2 significativamente maiores (52 a 96% de elevação nos valores médios) que a V E. Conclui-se que a mudança de decúbito, em equinos anestesiados com halotano e mantidos sob V E, resulta em hipercapnia, acidose respiratória e diminuição dos valores de PaO2. A instituição de V C, desde o início da anestesia, previne a acidose respiratória, além de resultar em valores de PaO2 mais próximos do ideal para animais respirando O2 a 100%.
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Affiliation(s)
| | | | | | | | - M. Moreira
- Regimento de Cavalaria Dragões da Independência
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Monteiro ER, Teixeira-Neto FJ, Campagnol D, Alvaides RK, Garofalo NA, Matsubara LM. Effects of remifentanil on the minimum alveolar concentration of isoflurane in dogs. J Am Vet Med Assoc 2010. [DOI: 10.2460/javma.236.4.450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Monteiro ER, Teixeira-Neto FJ, Campagnol D, Alvaides RK, Garofalo NA, Matsubara LM. Effects of remifentanil on the minimum alveolar concentration of isoflurane in dogs. Am J Vet Res 2010; 71:150-6. [DOI: 10.2460/ajvr.71.2.150] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Monteiro ER, Campagnol D, Parrilha LR, Furlan LZ. Evaluation of cardiorespiratory effects of combinations of dexmedetomidine and atropine in cats. J Feline Med Surg 2009; 11:783-92. [DOI: 10.1016/j.jfms.2008.12.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2008] [Indexed: 10/21/2022]
Abstract
The cardiovascular effects of dexmedetomidine alone or in combination with atropine were studied in six cats. Cats underwent four treatments in a randomized crossover design as follows: DEX15, saline+dexmedetomidine 15 μg/kg; DEX30, saline+dexmedetomidine 30 μg/kg; ADEX15, atropine+dexmedetomidine 15 μg/kg; ADEX30, atropine+dexmedetomidine 30 μg/kg. Pulse rate (PR) and systolic arterial pressure (SAP) decreased in DEX15 and DEX30. Premedication with atropine was effective in preventing bradycardia (PR<100 beats/min) and resulted in a biphasic effect in blood pressure. Hypertension was followed by a gradual decrease in SAP. Rate pressure product decreased in DEX15 and DEX30 whereas in ADEX15 and ADEX30 it remained within baseline values for at least 60 min. Although premedication with atropine in cats sedated with dexmedetomidine prevents bradycardia, it induces hypertension and increases myocardial oxygen consumption. The magnitude of cardiovascular effects produced by dexmedetomidine in cats does not seem to be dose-related.
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Affiliation(s)
- Eduardo R. Monteiro
- Faculdade de Medicina Veterinária, Centro Universitário de Vila Velha (UVV), Vila Velha-ES, Brazil
| | - Daniela Campagnol
- Pós-Graduação em Anestesiologia, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (UNESP), Botucatu-SP, Brazil
| | - Letícia R. Parrilha
- Faculdade de Medicina Veterinária, Centro Universitário de Maringá (CESUMAR), Maringá-PR, Brazil
| | - Luísa Z. Furlan
- Faculdade de Medicina Veterinária, Centro Universitário de Maringá (CESUMAR), Maringá-PR, Brazil
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Monteiro ER, Junior AR, Assis HMQ, Campagnol D, Quitzan JG. Comparative study on the sedative effects of morphine, methadone, butorphanol or tramadol, in combination with acepromazine, in dogs. Vet Anaesth Analg 2009; 36:25-33. [DOI: 10.1111/j.1467-2995.2008.00424.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Monteiro E, Dossi R, Antunes A, Campagnol D, Bettini C, Choma J. Efeitos da metadona ou do neostigmine, associados à lidocaína administrados pela via epidural em cães. ARQ BRAS MED VET ZOO 2008. [DOI: 10.1590/s0102-09352008000600020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Seis cães adultos, de raças e sexos variados, com peso de 13,3±3,4kg (média±DP), foram utilizados no estudo. Os animais foram tranqüilizados com acepromazina (0,1mg/kg, IV) e, após 30 minutos, foram aleatoriamente submetidos à anestesia epidural com um dos seguintes tratamentos: lidocaína 2% 0,25ml/kg (controle); neostigmine 0,01mg/kg+lidocaína (NEO); metadona 0,3mg/kg+lidocaína (MET). Todos os animais foram submetidos aos três tratamentos com intervalo mínimo de uma semana. Foram mensuradas as freqüências cardíaca (FC) e respiratória (FR), a pressão arterial sistólica (PAS), o tempo para a perda do reflexo interdigital, a duração e a altura do bloqueio sensitivo, durante um período de 90 minutos. Não houve diferença significativa entre os tratamentos nos valores de FC, PAS e FR, bem como na duração do bloqueio sensitivo e no tempo para a perda do reflexo interdigital. No grupo MET, houve diminuição de FC dos 30 aos 90 minutos em relação ao valor basal. Bloqueio sensitivo mais cranial também foi observado em MET. A associação de neostigmine ou metadona não prolongou o período hábil de anestesia epidural produzido pela lidocaína em cães. A metadona, mas não o neostigmine, parece estender mais cranialmente o bloqueio epidural pela lidocaína.
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Monteiro ER, Figueroa CDN, Choma JC, Campagnol D, Bettini CM. Effects of methadone, alone or in combination with acepromazine or xylazine, on sedation and physiologic values in dogs. Vet Anaesth Analg 2008; 35:519-27. [DOI: 10.1111/j.1467-2995.2008.00412.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Figueiredo JP, Cruz ML, Mendes GM, Marucio RL, Riccó CH, Campagnol D. Assessment of brachial plexus blockade in chickens by an axillary approach. Vet Anaesth Analg 2008; 35:511-8. [DOI: 10.1111/j.1467-2995.2008.00410.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Monteiro ER, Picoli FM, Queiroz MGDO, Campagnol D, Quitzan JG. Efeitos sedativo e cardiorrespiratório da administração da metadona, isoladamente ou em associação à acepromazina ou xilazina, em gatos. Braz J Vet Res Anim Sci 2008. [DOI: 10.11606/issn.1678-4456.bjvras.2008.26688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Seis felinos com peso médio de 3,3±0,3 kg foram aleatoriamente submetidos a 6 tratamentos, com intervalo mínimo de 1 semana. Os animais receberam a administração intramuscular de solução fisiológica (controle), metadona (0,3 mg/kg), acepromazina (0,1 mg/kg), xilazina (1,0 mg/kg), acepromazina (0,05 mg/kg) + metadona (0,3 mg/kg) ou xilazina (0,5 mg/kg) + metadona (0,3 mg/kg). As freqüências cardíaca (FC) e respiratória (FR), a pressão arterial sistólica (PAS), a temperatura retal, o grau de sedação e o reflexo interdigital foram avaliados antes (basal) e após a administração dos tratamentos em intervalos específicos por 90 minutos. Nos animais tratados com xilazina ou xilazina/metadona, houve diminuição em FR, FC e na temperatura retal. Nos mesmos tratamentos, 1/6 e 2/6 animais não apresentaram reflexo interdigital em pelo menos um dos momentos avaliados. Nos animais que receberam a administração de 0,1 mg/kg de acepromazina, houve diminuição em PAS. Os escores de sedação foram mais elevados nos animais que receberam a administração de xilazina ou xilazina associada à metadona. A administração da metadona isolada ou associada à acepromazina resultou em sedação considerada insatisfatória e sinais de excitação em alguns animais. O uso da metadona isolado ou em associação à acepromazina foi considerado ineficaz quando se objetiva sedação moderada à intensa. A associação da metadona à xilazina produz sedação moderada à intensa, sendo esse efeito semelhante àquele observado após a administração da xilazina isoladamente em dose mais elevada.
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Alvaides RK, Teixeira Neto FJ, Aguiar AJA, Campagnol D, Steagall PVM. Sedative and cardiorespiratory effects of acepromazine or atropine given before dexmedetomidine in dogs. Vet Rec 2008; 162:852-6. [DOI: 10.1136/vr.162.26.852] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- R. K. Alvaides
- Departamento de Cirurgia e Anestesiologia Veterinária; Faculdade de Medicina Veterinária e Zootecnia; Universidade Estadual Paulista; Botucatu São Paulo CEP 18618-000 Brazil
| | - F. J. Teixeira Neto
- Departamento de Cirurgia e Anestesiologia Veterinária; Faculdade de Medicina Veterinária e Zootecnia; Universidade Estadual Paulista; Botucatu São Paulo CEP 18618-000 Brazil
| | - A. J. A. Aguiar
- Departamento de Cirurgia e Anestesiologia Veterinária; Faculdade de Medicina Veterinária e Zootecnia; Universidade Estadual Paulista; Botucatu São Paulo CEP 18618-000 Brazil
| | - D. Campagnol
- Departamento de Cirurgia e Anestesiologia Veterinária; Faculdade de Medicina Veterinária e Zootecnia; Universidade Estadual Paulista; Botucatu São Paulo CEP 18618-000 Brazil
| | - P. V. M. Steagall
- Departamento de Cirurgia e Anestesiologia Veterinária; Faculdade de Medicina Veterinária e Zootecnia; Universidade Estadual Paulista; Botucatu São Paulo CEP 18618-000 Brazil
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Campagnol D, Teixeira Neto FJ, Giordano T, Ferreira TH, Monteiro ER. Effects of epidural administration of dexmedetomidine on the minimum alveolar concentration of isoflurane in dogs. J Am Vet Med Assoc 2007. [DOI: 10.2460/javma.231.12.1883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Campagnol D, Teixeira Neto FJ, Giordano T, Ferreira TH, Monteiro ER. Effects of epidural administration of dexmedetomidine on the minimum alveolar concentration of isoflurane in dogs. Am J Vet Res 2007; 68:1308-18. [DOI: 10.2460/ajvr.68.12.1308] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Campagnol D, Teixeira Neto FJ, Monteiro ER, Beier SL, Aguiar AJA. Use of bispectral index to monitor depth of anesthesia in isoflurane-anesthetized dogs. Am J Vet Res 2007; 68:1300-7. [DOI: 10.2460/ajvr.68.12.1300] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
OBJECTIVE To evaluate the effects of acepromazine maleate on the cardiovascular changes induced by dopamine in isoflurane-anesthetized dogs. STUDY DESIGN Prospective, randomized cross-over experimental design. ANIMALS Six healthy adult spayed female dogs weighing 16.4 +/- 3.5 kg (mean +/- SD). METHODS Each dog received two treatments, at least 1 week apart. Acepromazine (0.03 mg kg(-1), IV) was administered 15 minutes before anesthesia was induced with propofol (7 mg kg(-1), IV) and maintained with isoflurane (1.8% end-tidal). Acepromazine was not administered in the control treatment. Baseline cardiopulmonary parameters were measured 90 minutes after induction. Thereafter, dopamine was administered intravenously at 5, 10, and 15 microg kg(-1) minute(-1), with each infusion rate lasting 30 minutes. Cardiopulmonary data were obtained at the end of each infusion rate. RESULTS Dopamine induced dose-related increases in cardiac index (CI), stroke index, arterial blood pressure, mean pulmonary arterial pressure, oxygen delivery index (DO(2)I) and oxygen consumption index. In the control treatment, systemic vascular resistance index (SVRI) decreased during administration of 5 and 10 microg kg(-1) minute(-1) of dopamine and returned to baseline with the highest dose (15 microg kg (-1) minute(-1)). After acepromazine treatment, SVRI decreased from baseline during dopamine administration, regardless of the infusion rate, and this resulted in a smaller increase in blood pressure at 15 microg kg (-1) minute(-1). During dopamine infusion hemoglobin concentrations were lower following acepromazine and this contributed to significantly lower arterial O(2) content. CONCLUSIONS Acepromazine prevented the return in SVRI to baseline and reduced the magnitude of the increase in arterial pressure induced by higher doses of dopamine. However, reduced SRVI associated with lower doses of dopamine and the ability of dopamine to increase CI and DO(2)I were not modified by acepromazine premedication. CLINICAL RELEVANCE Previous acepromazine administration reduces the efficacy of dopamine as a vasopressor agent in isoflurane anesthetized dogs. Other beneficial effects of dopamine such as increased CO are not modified by acepromazine.
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Affiliation(s)
- Eduardo R Monteiro
- Faculdade de Medicina Veterinária, Centro Universitário de Maringá, Maringá, Paraná, Brazil
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Monteiro ER, Teixeira Neto FJ, Castro VB, Campagnol D. Effects of acepromazine on the cardiovascular actions of dopamine in anesthetized dogs. Vet Anaesth Analg 2007. [DOI: 10.1111/j.1467-2995.2007.00328.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tebet JM, Martins MIM, Chirinea VH, Souza FF, Campagnol D, Lopes MD. Cryopreservation effects on domestic cat epididymal versus electroejaculated spermatozoa. Theriogenology 2006; 66:1629-32. [PMID: 16546245 DOI: 10.1016/j.theriogenology.2006.02.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Frozen-thawed epididymal spermatozoa have already been successfully used in artificial insemination in the domestic cat, proving to be a valuable resource for the reproduction of felid species, which are threatened with extinction. The aim of this study was to compare the effects of freezing and thawing on domestic cat semen collected by electroejaculation (EL) and from the epididymides (EP) and vasa deferentia. Ten adult cats were anesthetized, electroejaculated and immediately thereafter, orchiectomized. Epididymal spermatozoa were collected through the compression of caudae epididymidis and vasa deferentia. Spermatozoa were frozen-thawed following a single protocol. Sperm motility, sperm progressive status (0-5), plasma membrane integrity and morphology (light and transmission electron microscope) were assessed on two occasions, immediately after collection and after freezing and thawing. There were no significant differences between the electroejaculated and epididymal fresh or frozen-thawed spermatozoa for any of the variables. However, the incidence of acrosome defects after freezing and thawing increased by 19% based on light microscopy, whereas ultrastructural images revealed acrosome damages in most sperm cells. Since these acrosomal changes are known to affect sperm fertilising capacity, further studies are needed to optimize cryopreservation techniques for epididymal as well as electroejaculated domestic cat spermatozoa.
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Affiliation(s)
- J M Tebet
- Departamento de Reprodução Animal e Radiologia Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Distrito de Rubião Jr, 18100-000 Botucatu, SP, Brazil.
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Steagall PVM, Teixeira Neto FJ, Minto BW, Campagnol D, Corrêa MA. Evaluation of the isoflurane-sparing effects of lidocaine and fentanyl during surgery in dogs. J Am Vet Med Assoc 2006; 229:522-7. [PMID: 16910849 DOI: 10.2460/javma.229.4.522] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the isoflurane-sparing effects of lidocaine and fentanyl administered by constant rate infusion (CRI) during surgery in dogs. DESIGN Randomized prospective study. Animals-24 female dogs undergoing unilateral mastectomy because of mammary neoplasia. PROCEDURES After premedication with acepromazine and morphine and anesthetic induction with ketamine and diazepam, anesthesia in dogs (n = 8/group) was maintained with isoflurane combined with either saline (0.9% NaCl) solution (control), lidocaine (1.5 mg/kg [0.68 mg/lb], IV bolus, followed by 250 microg/kg/min [113 microg/lb/min], CRI), or fentanyl (5 microg/kg [2.27 microg/lb], IV bolus, followed by 0.5 microg/kg/min [0.23 microg/lb/min], CRI). Positive-pressure ventilation was used to maintain eucapnia. An anesthetist unaware of treatment, endtidal isoflurane (ETiso) concentration, and vaporizer concentrations adjusted a nonprecision vaporizer to maintain surgical depth of anesthesia. Cardiopulmonary variables and ETiso values were monitored before and after beginning surgery. RESULTS Heart rate was lower in the fentanyl group. Mean arterial pressure did not differ among groups after surgery commenced. In the control group, mean +/- SD ETiso values ranged from 1.16 +/- 0.35% to 1.94 +/- 0.96%. Fentanyl significantly reduced isoflurane requirements during surgical stimulation by 54% to 66%, whereas the reduction in ETiso concentration (34% to 44%) observed in the lidocaine group was not significant. CONCLUSIONS AND CLINICAL RELEVANCE Administration of fentanyl resulted in greater isoflurane sparing effect than did lidocaine. However, it appeared that the low heart rate induced by fentanyl may partially offset the improvement in mean arterial pressure that would be expected with reduced isoflurane requirements.
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Affiliation(s)
- Paulo V M Steagall
- Department of Veterinary Surgery and Anesthesiology, School of Veterinary Medicine and Animal Science, São Paulo State University, Botucatu, SP 18618-000, Brazil
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