Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1590/S0034-70942006000200002
Brazilian Journal of Anesthesiology
Scientific Article

Uso de dexmedetomidina em pacientes obesos mórbidos submetidos a gastroplastia: estabilidade cardiovascular e consumo de anestésicos venosos. Estudo retrospectivo

Dexmedetomidine in morbid obese patients undergoing gastroplasty: cardiovascular stability and consumption of intravenous anesthetics. A retrospective study

Luiz Piccinini Filho; Lígia Andrade da Silva Telles Mathias; Carlos Alberto Malheiros; Waldemar Montoya de Gregori; Álvaro Antonio Guaratini; Joaquim Edson Vieira

http://dx.doi.org/10.1590/S0034-70942006000200002 Braz J Anesthesiol, vol.56, n2, p.109-118, 2006
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Resumo

JUSTIFICATIVA E OBJETIVOS: A utilização de agentes anestésicos potentes e de curta duração é fundamental em pacientes submetidos à intervenção cirúrgica bariátrica. A dexmedetomidina, agonista alfa 2-adrenérgico, surgiu como uma opção adjuvante da técnica de anestesia venosa. O objetivo desta pesquisa foi avaliar a eficácia da dexmedetomidina associada à anestesia venosa, em pacientes obesos mórbidos, submetidos a gastroplastia. MÉTODO: Análise retrospectiva, de pacientes portadores de obesidade mórbida, submetidos à intervenção cirúrgica bariátrica aberta, sob anestesia com propofol e alfentanil acrescidos ou não de dexmedetomidina. Os pacientes foram alocados em dois grupos: Controle (propofol e alfentanil) e Dexmedetomidina (propofol, alfentanil e dexmedetomidina). A manutenção da anestesia nos dois grupos constou de propofol = 0,075 a 0,1 mg.kg-1.min-1 e alfentanil = 0,75 a 1 µg.kg-1.min-1; no grupo Dexmedetomidina na dose inicial de 1 µg.kg-1 em 10 min e manutenção com 0,4 a 0,7 µg.kg-1.h-1. As variáveis estudadas foram idade, sexo, IMC, tempos cirúrgico e de despertar, freqüência cardíaca (FC), pressão arterial sistólica e diastólica (PAS, PAD), saturação periférica de hemoglobina (SpO2), consumo de propofol e alfentanil e efeitos colaterais. RESULTADOS: Houve redução significativa do consumo de propofol e alfentanil no grupo Dexmedetomidina. A FC apresentou variação significativa apenas no grupo Dexmedetomidina. A PAS e a PAD apresentaram redução estatística significativa nos dois grupos nos primeiros 20 min, estabilizando-se a seguir. Os pacientes dos dois grupos não apresentaram efeitos colaterais. CONCLUSÕES: Este estudo demonstrou a eficácia do uso da dexmedetomidina associada à anestesia venosa com propofol e alfentanil, promovendo redução do consumo dos anestésicos venosos, estabilidade cardiovascular e tempo de despertar similar à técnica sem adição de dexmedetomidina. Não houve efeitos colaterais imputáveis ao uso da dexmedetomidina.

Palavras-chave

ANALGÉSICOS, Opióides, ANESTESIA, Geral, ANESTÉSICOS, Venoso, CIRURGIA, Abdominal, DOENÇAS, DROGAS

Abstract

BACKGROUND AND OBJECTIVES: The administration of powerful and short duration anesthetic agents is essential for patients undergoing bariatric surgical procedure. The dexmedetomidine, an alpha 2-adrenergic agonist, has appeared as an adjuvant option of the venous anesthesia technique. This study aimed at assessing the efficacy of dexmedetomidine associated with the venous anesthesia in morbid obese patients undergoing gastroplasty procedures. METHODS: Retrospective analysis of morbid obese patients undergone open bariatric surgical intervention under anesthesia with propofol and alfentanil, with or without dexmedetomidine. Patients were allocated into two groups: Control (propofol and alfentanil) and Dexmedetomidine (propofol, alfentanil and dexmedetomidine). For both groups, the anesthetic maintenance was as follows: propofol = 0.075 to 0.1 mg.kg-1.min-1 and alfentanil = 0.75 to 1 µg.kg-1.min-1; in the dexmedetomidine (DMD) group, initial dose of 1 µg.kg-1 in 10 min and maintenance with 0.4 to 0.7 µg.kg-1.h-1. The variables studied were: age, gender, body mass index (BMI), surgical time and recovery time, heart rate (HR), systolic and diastolic blood pressure (SBP and DBP), hemoglobin peripheral saturation (SpO-2), propofol and alfentanil consumption and side effects. RESULTS: The dexmedetomidine group has shown a significant reduction in propofol and alfentanil consumption. The heart rate presented a significant variation only in the dexmedetomidine group. Both SPB and DBP presented a statistically significant reduction in both groups for the first 20 minutes, and subsequent stabilization. No side effects were observed in both groups of patients. CONCLUSIONS: This study has shown the efficacy of dexmedetomidine administration in combination with venous anesthesia with propofol and alfentanil, thus promoting reduction in venous anesthetic drugs consumption, cardiovascular stability and time to recovery similar to that of the technique without dexmedetomidine. No side effects were noted associated with the use of dexmedetomidine.

Keywords

ANALGESICS, Opioids, ANESTHESIA, General, ANESTHETICS, Venous, DISEASES, DRUGS, SURGERY, Abdominal

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