Cirurgia de terceiro molar sob sedação com óxido nitroso: avaliação subjetiva e cardiovascular

Este estudo teve por objetivo avaliar o grau de aceitacao, a ansiedade e a variacao de frequencia cardiaca (FC). saturacao de oxigenio (SpO) e pressao arterial sistolica (PAS) e diastolica (PAD) em cirurgias de terceiros molares com e sem sedacao consciente com oxido nitroso e oxigenio (N2O/ 02)' Vinte voluntarios saudaveis com necessidade de extracao dos terceiros molares bilaterais participaram do estudo, o qual foi realizado em tres fases: Fase A - N2O/ 02 sem intervencao odontologica; Fases B e C - exodontia de um dos lados, de forma aleatoria, com (C-N2O) ou sem (S-N2O) sedacao associada. Para definir o grau de ansiedade utilizou-se a Escala de Ansiedade Dental de Corah (EADC); a sensacao dolorosa foi quantificada pela Escala de 11 pontos em caixa (EC); e o grau de aceitacao da sedacao pelo questionario subjetivo (QS). 60% dos voluntarios deram nota maxima para C-N2O e todos os voluntarios afirmaram que a sessao C-N2O foi mais agradavel. O relato de dor apos a sessao C-N2O foi menor ou igual a da sessao S-N2O para 85% dos voluntarios. A FC apresentou diferenca significante entre as fases C-N2O e S-N2O, diferentemente da Sp02, PAD e PAS. Concluiu-se que os voluntarios mostraram-se moderadamente ansiosos em todas as fases, sendo a sessao C-N2O mais agradavel que S-N20, A C-N20 reduziu significativamente a FC, mas nao influenciou na PAS, PAD e Sp02. A C-N20 nao alterou a sintomatologia dolorosa durante e apos a cirurgia (AU) The purpose of this study was to evaluate the changes of heart rate (HR). oxygen saturation (SpO) and both diastolic (DBP) and systolic (SBP) blood pressure, anxiety and acceptance of nitrous oxide conscious sedation (N2O/ 0) in three phases: A - N2O/ 02 without surgery; B and C - extraction of one of the sides with (C-N2O) or without (S-N2O) nitrous oxide sedation, in a random cross-over manner. Twenty healthy volunteers, average age of 20.55 years, undergoing removal of third molars were selected. Corah's Dental Anxiety Scale (CDS); Eleven points in box Scale (EC) and subject questionnaire (QS) was used to evaluation. The comparative values between phases were analyzed by Wilcoxon's and Friedman's test (= 0,05) and by explorative analysis (QS). The volunteers moderately revealed anxious in all the phases and 60% of volunteers had given maximum note for C-N2O All volunteers had affirmed that C-N2O was more pleasant. The pain report after the C-N2O was lesser or equal for 85% of volunteers. The HR presented significant difference between phases C-N2O and S-N2O (p= 0.020). There were no significant statistical differences between phases to SpO2 (p= 0.153). DBP (p= 0.730) and SBP (p= 0.975). These results suggest that C-N2O was most pleasant and reduced the HR significantly, but it did not influence in the SBP, DBP and Sp02, nor modified the pain during or after surgery (AU)