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Doctoral Thesis
DOI
10.11606/T.23.2012.tde-06032012-162856
Document
Author
Full name
Mauricio José Tornelli
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Rocha, Rodney Garcia (President)
Borsatti, Maria Aparecida
Perrella, Andréia
Prado, Gustavo Faibischew
Zanet, Tiago Gorgulho
Title in Portuguese
Uso de hialuronidase 75 UTR/ml concomitante à mepivacaína associada à epinefrina em bloqueio do nervo alveolar inferior: estudo hemodinâmico e eletrocardiográfico
Keywords in Portuguese
Anestésico Local
Eletrocardiografia
Hialuronogluconaminidase. Hemodinâmica
Mepivacaína
Odontologia
Abstract in Portuguese
Dentre os adjuvantes para os anestésicos locais (AL), a enzima hialuronidase tem seu uso consagrado na anestesia oftalmológica como difusor do AL. É utilizada para melhorar a eficácia clínica e prolongar a anestesia como alternativa aos anestésicos locais de longa duração em pacientes com comprometimento sistêmico. Este estudo duplo-cego e controlado avaliou os efeitos cardiovasculares induzidos por 3,6 ml de anestésico local (AL) cloridrato de mepivacaína 2% com epinefrina 1:100.000 concomitantemente à hialuronidase 75 UTR/ml ou placebo (veiculo), em bloqueio do nervo alveolar inferior para realização de cirurgia de terceiros molares inferiores bilaterais e simétricos, em 20 pacientes. Foi realizada apenas uma cirurgia por consulta, no mesmo horário e operador. Os parâmetros cardiovasculares pressão sistólica (PS), diastólica (PD), média (PM) e freqüência cardíaca (FC) foram monitorados através de método oscilométrico e fotopletismográfico, em 10 etapas clínicas. Os registros eletrocardiográficos (ECG) das 12 derivações foram obtidos em 4 etapas: (T1) basal; (T2) anestésico local; (T3), 5 min. do AL; (T4) após a cirurgia. Foram avaliadas no ECG as seguintes variáveis: frequência cardíaca, duração do intervalo PR , duração do complexo QRS, duração do segmento QT corrigido. A hialuronidase injetada concomitantemente com o anestésico local (AL) não induziu alterações nas PS, PD, PM e FC (p>0,01, n=20) comparada ao placebo, mas houve alteração (p>0,01) na PS e FC na interação tempo x fármacos. Não foram observadas alterações eletrocardiográficas (n=18) consideradas de importância clínica como: infradesnivelamento do segmento ST, supradesnivelamento do segmento ST, extrassístoles de complexo QRS largo e extrassístoles de complexo QRS estreito. O uso do anestésico local injetado concomitante à hialuronidase 75 UTR/ml mostrou-se seguro para esta dose e via de administração.
Title in English
Use of hyaluronidase 75 TRU/ml concomitantly with mepivacaine associated epinephrine and inferior alveolar nerve block: hemodynamic and electrocardiographic study
Keywords in English
Dentistry
Electrocardiographic
Hialuronogluconaminidase. Hemodynamic
Local Anesthetics
Mepivacaine
Abstract in English
Among the adjuvants to local anesthetics (LA), the enzyme hyaluronidase has its consecrated in ophthalmic anesthesia as a diffuser (spread) of the LA. It is used to improve the clinical efficacy and prolong anesthesia as an alternative to long lasting local anesthetics in patients with systemic involvement. This double-blind, controlled trial evaluated the cardiovascular effects induced by 3.6 ml of local anesthetic (LA) 2% mepivacaine hydrochloride with epinephrine 1:100,000 concomitantly with hyaluronidase 75 TRU/ml or placebo (vehicle) in blocking inferior alveolar nerve for performing third molar surgery bilateral and symmetrical in 20 patients. Surgery was performed only one by appointment, at the same time and operator. The cardiovascular parameters systolic blood pressure (SBP), diastolic blood pressure (DBP), mean blood pressure (MBP) and heart rate (HR) were monitored using the oscillometric method and photoplethysmography in 10 clinical stages. Records electrocardiographic (ECG) of 12 leads were obtained in four steps: (T1) baseline, (T2) local anesthetic, (T3), 5 mim AL, (T4) after surgery. ECG were evaluated in the following variables: heart rate, duration of PR segment, duration of the complex QRS, duration of the corrected QT interval. Hyaluronidase injected concomitantly with local anesthetic did not induce changes in the SBP, DBP, MBP, and HR (p> 0.01, n = 20) compared to placebo, except in the interaction between steps and drugs (p<0.01) for SBP and HR. There were no ECG changes (n = 18) considered of clinical importance as ST segment depression, ST segment elevation, extrasystoles wide QRS complex and extrasystoles of narrow QRS complex. The use of local anesthetic injected concomitantly with hyaluronidase 75 TRU/ml was safe at this dose and route of administration.
 
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Publishing Date
2012-03-21
 
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