Simultaneous blood perfusion and oxygenation monitoring is crucial for patients undergoing a transplant procedure. This becomes of great importance during the surgical recovery period of a transplant procedure when uncorrected loss of perfusion or reduction in oxygen saturation can result in patient death. Pulse oximeters are standard monitoring devices which are used to obtain the perfusion level and oxygen saturation using the optical absorption properties of hemoglobin. However, in cases of varying perfusion due to hemorrhage, blood clot or acute blockage, the oxygenation results obtained from traditional pulse oximeters are erroneous due to a sudden drop in signal strength. The long term goal of the project is to devise an implantable optical sensor which is able to perform better than the traditional pulse oximeters with changing perfusion and function as a local warning for sudden blood perfusion and oxygenation loss. In this work, an optical sensor based on a pulse oximeter with an additional source at 810nm wavelength has been developed for in situ monitoring of transplant organs. An algorithm has been designed to separate perfusion and oxygenation signals from the composite signal obtained from the three source pulse oximetry-based sensor. The algorithm uses 810nm reference signals and an adaptive filtering routine to separate the two signals which occur at the same frequency. The algorithm is initially applied to model data and its effectiveness is further tested using in vitro and in vivo data sets to quantify its ability to separate the signals of interest. The entire process is done in real time in conjunction with the autocorrelation-based time domain technique. This time domain technique uses digital filtering and autocorrelation to extract peak height information and generate an amplitude measurement and has shown to perform better than the traditional fast Fourier transform (FFT) for semi-periodic signals, such as those derived from heart monitoring. In particular, in this paper it is shown that the two approaches produce comparable results for periodic in vitro perfusion signals. However, when used on semi periodic, simulated, perfusion signals and in vivo data generated from an optical perfusion sensor the autocorrelation approach clearly (Standard Error, SE = 0.03) outperforms the FFT-based analysis (Standard Error, SE = 0.62).

The ROx is a retinal oximeter under development with the purpose of non-invasively and accurately measuring oxygen saturation (SO₂) in vivo. It is novel in that it utilizes the blue-green oximetry technique with on-axis illumination. ROx calibration tests were performed by inducing hypoxia in live anesthetized swine and comparing ROx measurements to SO₂ values measured by a CO-Oximeter. Calibration was not achieved to the precision required for clinical use, but limiting factors were identified and improved. The ROx was used in a set of sepsis experiments on live pigs with the intention of tracking retinal SO₂ during the development of sepsis. Though conclusions are qualitative due to insufficient calibration of the device, retinal venous SO₂ is shown to trend generally with central venous SO₂ as sepsis develops. The novel sepsis model developed in these experiments is also described. The method of cecal ligation and perforation with additional soiling of the abdomen consistently produced controllable severe sepsis/septic shock in a matter of hours. In addition, the ROx was used to collect retinal images from a healthy human volunteer. These experiments served as a bench test for several of the additions/modifications made to the ROx. This set of experiments specifically served to illuminate problems with various light paths and image acquisition. The analysis procedure for the ROx is under development, particularly automating the process for consistency, accuracy, and time efficiency. The current stage of automation is explained, including data acquisition processes and the automated vessel fit routine. Suggestions for the next generation of device minimization are also described.

BACKGROUND: In children, sleep-related airway obstruction by large tonsils and adenoids can cause obstructive sleep apnea (OSA). OSA may lead to poor growth, developmental delay, behaviour or learning problems. Recent evidence also suggests that children with OSA may develop cardiovascular complications, the mechanisms perhaps involving hypoxemia, the autonomic nervous system, apneas, and arousals. Surgical removal of tonsils and adenoids (adenotonsillectomy (T&A)) usually cures pediatric OSA. To diagnose OSA at all levels of severity, polysomnography is currently the best approach. The McGill Oximetry Score (MOS) is a validated measure based on nocturnal pulse oximetry. An abnormal MOS has a 97% positive predictive value at detecting moderate-severe OSA. Because the MOS was devised by measuring frequency of desaturations (<90%) and numbers of clusters of desaturations, it is not accurate at detecting OSA in children who do not have such drops in oxygen saturation. Accordingly, other measures applicable to a wider spectrum of children should be assessed. These measures should be simpler, less cumbersome, cheaper, and more accessible than polysomnography. / OBJECTIVES: To study alternative approaches that may be used to identify moderate-severe OSA in children, two studies were conducted. We examined one subjective measure - the OSA-18 parent questionnaire - and two objective measures - pulse rate and pulse rate variability. For the OSA-18 study, the goal was to determine whether it would accurately detect children with moderate-severe OSA as indicated by an abnormal MOS. For the pulse rate and pulse rate variability study, the goal was to determine if either or both would decrease after treatment with T&A for children with moderate-severe OSA. / METHODS: For the OSA-18 study, we used a cross-sectional design that included children 1-18 years old referred to a pediatric sleep laboratory for evaluation of suspected OSA. Alongside data from the OSA-18, we analyzed demographic and medical data (from a parent questionnaire) and information regarding adenotonsillar hypertrophy. We estimated sensitivity, specificity, positive and negative predictive values as well as receiver operating curves of the OSA-18 in detecting an abnormal MOS. We also conducted univariate and multivariate logistic regression analyses, using the MOS as the dependent variable and the OSA-18 score and others (age, gender, comorbidities, race) as independent variables. For the second study, we used a retrospective before-after design to compare pulse rate and pulse rate variability as measured by nocturnal pulse oximetry pre- and post-T&A of otherwise healthy children 1-18 years old with moderate-to-severe OSA. / RESULTS: For the OSA-18 study, we studied 334 children (58% male, mean age 4.6 +/- 2.2 years). The OSA-18 had a sensitivity of 40% and a negative predictive value of 73% for detecting an abnormal MOS. In addition, the area under the receiver operating curve was 0.611. While controlling for other independent variables in the logistic regression model, for each unit increase in the OSA-18 Score, the odds of having an abnormal MOS were increased by 2%. However, for each increase in age of 1 year, the odds of having an abnormal MOS were decreased by 17%. In the pulse rate and pulse rate variability study, 25 subjects (88% male; mean age 4.3 +/- 3.6 years) were enrolled. Following T&A, pulse rate and pulse rate variability decreased in 21 of 25 and 23 of 25 children, respectively. Mean pulse rate dropped from 99.7+/-11.2 to 90.1+/-10.7 bpm, p<0.001; age-standardized pulse rate (z-score) from 0.8 (0.4, 1.5) to 0.4 (0, 0.9), p=0.04). Pulse rate variability, as measured by the standard deviation of the pulse rate decreased from 10.3 +/- 2.1 to 8.2 +/- 1.6 bpm, p<0.001. As well, OSA symptomatology, parental concern about breathing during sleep and the MOS all improved. / CONCLUSIONS: Based on the first study we conclude that among children referred to a sleep laboratory, the OSA-18 does not accurately detect which children will have an abnormal MOS. The OSA-18 should not be used in place of objective testing to identify moderate-severe OSA in children. However, from the second study we conclude that measures of the autonomic nervous system such as pulse rate and pulse rate variability, as measured by pulse oximetry, decreased following surgical treatment of moderate-severe OSA. The results of this study potentially serve as important data for further work that would determine the accuracy of pulse rate and pulse rate variability measures and their diagnostic usefulness for OSA at all levels of severity.

Background: Physiological studies have shown that many preterm infants and infants with chronic lung disease may suffer chronic hypoxaemia, which possibly leads to poor growth and development. Anecdotal reports indicate that there is a drive to increase the oxygen saturation target range to a higher level in these infants due primarily to perceived benefits derived from clinical experience and from uncontrolled observational studies of babies discharged on home oxygen. Objective The BOOST (Benefits Of Oxygen Saturation Targeting) trial is the first randomised trial to assess the long-term benefits and harms of two different oxygen saturation target ranges. Methods: BOOST was a multicentre, double blinded, randomised controlled trial that enrolled 358 infants born at less than 30 weeks� gestation who remained oxygen-dependent at 32 weeks postmenstrual age. They were randomly assigned to target either a functional oxygen saturation range of 91-94% (standard or control group) or 95-98% (higher or treatment group). The primary outcomes were growth and neurodevelopmental measures at 12 months corrected age. Secondary outcomes included length of hospital stay, retinopathy of prematurity, health service utilisation, parental stress, and infant temperament. Results: Prognostic baseline characteristics did not differ between the two groups. Mean birth weight and gestational age of enrolled infants was 917g and 26.5 weeks respectively. The rate of antenatal corticosteroid use was 83%.

Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 128-141).

Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 118-124).

Submitted by Franciele Moreira (francielemoreyra@gmail.com) on 2018-07-05T13:46:48Z No. of bitstreams: 2 Dissertação - Lorena Ferreira de Lima - 2018.pdf: 1515890 bytes, checksum: 736f331258ea1df6d5252354ed3ae965 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-06T12:41:03Z (GMT) No. of bitstreams: 2 Dissertação - Lorena Ferreira de Lima - 2018.pdf: 1515890 bytes, checksum: 736f331258ea1df6d5252354ed3ae965 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-07-06T12:41:03Z (GMT). No. of bitstreams: 2 Dissertação - Lorena Ferreira de Lima - 2018.pdf: 1515890 bytes, checksum: 736f331258ea1df6d5252354ed3ae965 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-03-16 / Aim: To evaluate the oxygen saturation level (SaO 2 ) of the pulp of the central upper incisors, before, during and after the performance of the combined technique of toothbleaching by means of pulse oximetry. Materials and methods: This was a randomized, triple blind clinical trial, in which the initial sample consisted of 80 patients aged 18 to 27 years, 160 central incisors healthy upper randomly allocated into 4 groups: G1 - Office bleaching with two applications hydrogen peroxide (H 2 O 2 ) at 35% for 20 minutes each, followed by home bleaching with carbamide peroxide 10% for 2 hours a day for 16 days; G2 - Protocol used in G1, with the use of a desensitizer in the dentifrice; G3 - Office bleaching with application of H 2 O 2 at 35% and one placebo gel, both for 20 minutes, followed by application to home bleaching with carbamide peroxide 10% for 2 hours a day for 16 days; G4 - Protocol used in G3, with use of desensitizer in the dentifrice. The measurement at SaO 2 of the pulp was performed on the upper central incisors before (T0) and immediately after (T1) the office bleaching; in the 5 th (T2), 8 th (T3), 12 th (T4) and 16 th day of home bleaching (T5); and after 7 (T6) and 30 (T7) days of completion of procedures. The mean level of SaO 2 pulp was described by mean and standard deviation. times and the average values ​​of saturation in groups by Estimations Generalized Equations model were compared (GEE) and used the Student t test for paired samples for analysis of overall average initial time (T0) and after thirty days after the end of tooth bleaching (T7) (p <0.05). Outcomes: The final sample consisted of 60 patients (n = 120 teeth), G1 (n = 28), G2 (n = 40), G3 (n = 26) and G4 (n = 26). The results showed a mean pulp SaO 2 level at G0 of 84.29%, G2 of 84.38%, G3 of 84.79% and G4 of 85.83%. There was a reduction of T0 for T1, 81.96%, 82.06%, 82.19% and 81.15% for G1, G2, G3 and G4, respectively, with difference in G4 (p = 0.006). During home bleaching, there was returned of the pupal oxygen saturation level in all groups, with mean values in T7 of 86.55%, 86.60%, 85.71%, 87.15% for G1, G2, G3 and G4, respectively, with difference in G2 (p = 0.004). Conclusion: The average level of initial pulp oxygen saturation for central upper incisors was 84.76%, with changes in saturation during the combined technique of tooth bleaching and final mean level, after 30 days, of 86.52%. / Objetivo: Avaliar o nível de saturação de oxigênio (SaO 2 ) da polpa de incisivos centrais superiores hígidos antes, durante e após a realização da técnica combinada de clareamento dentário, por meio de oximetria de pulso. Materiais e métodos: Tratou-se de um ensaio clínico randomizado triplo-cego, no qual a amostra inicial constituiu-se de 80 pacientes entre 18 e 27 anos, 160 incisivos centrais superiores hígidos, alocados aleatoriamente em 4 grupos: G1 - Clareamento de consultório com duas aplicações de peróxido de hidrogênio (H 2 O 2 ) a 35% por 20 minutos cada, seguido de clareamento caseiro com peróxido de carbamida a 10% por 2 horas ao dia, durante 16 dias; G2 - Protocolo empregado no G1, com uso de dessensibilizante no dentifrício; G3 - Clareamento de consultório com uma aplicação de H 2 O 2 a 35% e outra de gel placebo, ambos por 20 minutos, seguido de clareamento caseiro com aplicação de peróxido de carbamida a 10% por 2 horas ao dia, durante 16 dias; G4 - Protocolo empregado no G3, com uso de dessensibilizante no dentifrício. A mensuração da SaO 2 pulpar foi realizada nos incisivos centrais superiores antes (T0) e imediatamente após (T1) o clareamento de consultório; no 5º (T2), 8º (T3), 12º (T4) e 16º dia de clareamento caseiro (T5); e após 7 (T6) e 30 (T7) dias do término dos procedimentos. O nível médio da SaO 2 pulpar foi descrito pela média e desvio padrão. Foram comparados os tempos e os valores médios desta saturação nos grupos pelo modelo de Equações de Estimações Generalizadas (GEE) e utilizado o teste t de Student de amostras pareadas para análise da média geral do tempo inicial (T0) e após trinta dias do término do clareamento dentário (T7) (p<0,05). Resultados: A amostra final foi constituída por 60 pacientes (n=120 dentes), G1 (n=28), G2 (n=40), G3 (n=26) e G4 (n=26). Os resultados mostraram nível médio de SaO 2 pulpar em T0 no G1 de 84,29%, G2 de 84,38%, G3 de 84,79% e G4 de 85,83%. Observou-se redução de T0 para T1, 81,96%, 82,06%, 82,19% e 81,15%, para G1, G2, G3 e G4, respectivamente, com diferença em G4 (p=0,006). Durante o clareamento caseiro, houve retorno ao nível de saturação de oxigênio pupar em todos os grupos, com valores médios em T7 de 86,55%, 86,60%, 85,71%, 87,15% para G1, G2, G3 e G4, respectivamente, com diferença em G2 (p=0,004). Conclusão: O nível médio da saturação de oxigênio pulpar inicial para incisivos centrais superiores hígidos foi de 84,76%, com variações desta saturação durante a técnica combinada de clareamento dentário e nível médio final, após 30 dias, de 86,52%.

Orientador: Emilio Carlos Elias Baracat / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-10T15:05:19Z (GMT). No. of bitstreams: 1 Pupin_MelissaKarina_M.pdf: 1472103 bytes, checksum: f436fa1af6c6cd56ad2ce4e74db10cf1 (MD5) Previous issue date: 2008 / Resumo: Há controvérsias a respeito da indicação de técnicas de fisioterapia respiratória no tratamento de Bronquiolite Viral Aguda (BVA). As técnicas convencionais de fisioterapia parecem não contribuir na evolução clínica da BVA, enquanto as técnicas atuais ou ¿a fluxo¿, como o aumento do fluxo expiratório (AFE), ainda não foram avaliadas e permanecem como possibilidades terapêuticas. Objetivo: Comparar os efeitos da AFE e vibração associada à drenagem postural (DP) nos parâmetros cardiorrespiratórios de freqüência cardíaca (FC), freqüência respiratória (FR) e saturação transcutânea de oxigênio (SpO2) de lactentes com BVA. Casuística e Métodos: Foram analisados lactentes com BVA, atendidos na Unidade de Emergência Referenciada de Pediatria do Hospital de Clínicas da Universidade Estadual de Campinas no período de julho de 2005 a agosto de 2007. Os valores de FC, FR e SpO2 foram registrados em quatro tempos: antes do procedimento (tempo 1), imediatamente após (tempo 2), 30 (tempo 3) e 60 minutos do término do procedimento (tempo 4). Os pacientes foram divididos em três grupos de intervenção: grupo A submetido à AFE, grupo B vibração associada à DP, e grupo C (controle). A análise de dados foi feita por Análise de Variância (ANOVA), teste Qui-quadrado e teste exato de Fischer. Resultados: Foram incluídos no estudo 81 lactentes, 48 do gênero masculino e 33 do gênero feminino, média de idade de 4,52 meses e peso médio de 6,56 kg. 81,5% dos lactentes apresentavam-se no primeiro episódio de sibilância e 76,5% não tinham doença associada. Na comparação global entre os grupos e os tempos, a análise das médias da FR apresentou tendência de diferença significante (p = 0,0536) em relação ao grupo controle, com valores menores após o procedimento nos grupos A e B. Não houve diferença significante entre os três grupos na análise das médias da FC e SpO2 (p > 0,05). Conclusão: A aplicação das técnicas de fisioterapia respiratória, AFE e vibração associada à DP, parecem contribuir na diminuição da freqüência respiratória de lactentes com BVA / Abstract: There are controversies over the prescription of respiratory techniques in the treatment of Acute Viral Bronchiolitis (AVB). The conventional techniques don¿t seem to contribute to the clinical evolution of AVB, whereas the techniques of flow, as the increase in expiratory flow (IEF), haven¿t been evaluated yet and remain as therapeutical possibility. Objective: Compare the effects of IEF and the vibration associated to Postural Drainage (PD) in the heart respiratory parameters of heart rate (HR), respiratory rate (RR) and transcutaneous oxygen saturation (SpO2) of infants with AVB. Cause and Methods: Infants with AVB, taken to the Pediatrics Emergency Unit in Campinas State University Clinical Hospital, were analyzed in the period from July 2005 to August 2007. The values of HR, RR and SpO2 were registered four times: before the procedure (time 1), immediately after (time 2), 30 and 60 minutes from the end of procedure (times 3 and 4 respectively). The patients were divided into three intervention groups: group A submitted to IEF, group B to vibration associated to PD, and group C (control). The analysis of data was performed by Variance Analysis (ANOVA), qui quadratic and Fischer¿s exact test. Results: 81 infants were included in the study, 48 males and 33 females, average age of 4.52 years old and average weight of 6.56 kg. 81.5% of the infants presented the first episode of sibilance and 76.5% had no disease associated. In the global comparison between the groups in the four times, the analysis of the HR average presented a significant difference tendency (p = 0.0536) in relation to the control group, with smaller values in A and B groups. There was no significant difference between the three groups in the analysis of RR and SpO2 average (p > 0.05). Conclusion: The application of physiotherapy techniques, IEF and the vibration associated to PD seem to contribute to the decrease of the respiratory rate in infants with AVB / Mestrado / Saude da Criança e do Adolescente / Mestre em Saude da Criança e do Adolescente

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Searching to trace the clinical profile, epidemiologist, evolution and laboratorial of the internments of patients with Sickle Cell Disease (SCD); to identify factors that can be related with the sprouting and evolution of Acute Chest Syndrome (ACS), as well as; to evaluate if the average saturation of oxygen through the oximetry of pulse is diagnosis or prognostic of ACS; a study of coorte with 168 carrying patients was carried through of SCD. During all the year of 2006, 168 patients with SCD had been studied, had predominance of the males (51.8%) and of the age band between 5 and 15 years (53.3%), 81 (48.2%) patient ones had suffered at least a hospital internment, 34 (41.9%) had diagnosis of ACS in at least an internment and 47 (58.1%) had other causes internment as intense painful and anemia crisis. When we compare the ambulatorial accompaniment of the patients who had interned with of that they had not interned in 2006, perceive that the splenomegaly presence was more common between the patients whom they had interned (27.3%), with significance statistics (p = 0, 0006). The average saturation of oxygen through the oximetry of pulse also was significantly different (p = 0, 0092) between the two groups, a time that the patients who had suffered internment had gotten one better performance (95.6%) against 94,1 % of the patients who had not interned in 2006. When analyzing the variable hemoglobin and white cell count, we do not find differences significant. In relation to the patients with ACS, the fever complaint was more prevalent (70.6%), whereas the pain complaint more was related by the patients with other causes of internment (93.3%). With regard to the age band, it enters the older than 15 years, we notice minors indices (6.1%) of internment for ACS (p= 0, 04). It did not have significant difference with regard to the hemoglobin and the saturation of oxygen through the oximetry of pulse when compared the out results with the ones of the hospital admission. The total white globule counting was significantly superior in the occasion of the internment (p=0,001). One concludes that the average saturation of oxygen by pulse oximetry was not capable to identify the patients who would come to be interned with ACS. / Buscando traçar o perfil clínico, epidemiológico, evolutivo e laboratorial das internações de pacientes com Anemia Falciforme (AF); identificar fatores que possam estar relacionados com surgimento e evolução de Síndrome Torácica Aguda (STA), bem como; avaliar se a saturação média de oxigênio através da oximetria de pulso é diagnóstica ou prognóstica em relação a STA; foi realizado um estudo de coorte com 168 pacientes portadores de AF. Houve predomínio do gênero masculino (51,8%) e da faixa etária entre 5 e 15 anos (53,3%), 81(48,2%) pacientes sofreram pelo menos uma internação hospitalar, 34 (41,9%) tiveram diagnóstico de STA em pelo menos uma internação e 47 (58,1%) tiveram outras causas internação como crise dolorosa e anemia intensa. Quando comparamos o acompanhamento ambulatorial dos pacientes que internaram com o dos que não internaram em 2006, percebemos que a presença de esplenomegalia foi mais comum entre os pacientes que internaram (27,3%), com significância estatística (p = 0,0006). A saturação média de oxigênio através da oximetria de pulso também foi significativamente diferente (p = 0,0092) entre os dois grupos, uma vez que os pacientes que sofreram internação obtiveram um melhor desempenho (95,6%) contra 94,1% dos pacientes que não internaram em 2006. Ao analisarmos as variáveis hemoglobina e leucometria, não encontramos diferença estatisticamente significativa. Em relação aos pacientes com STA, a queixa de febre foi mais prevalente (70,6%), enquanto que a queixa de dor foi mais referida pelos pacientes com outras causas de internação (93,3%). Com relação à faixa etária, entre os maiores de 15 anos, notamos menores índices (6,1%) de internação por STA (p= 0,04). Não houve diferença estatisticamente significante com relação à hemoglobina e a saturação de oxigênio através da oximetria de pulso quando comparados os resultados ambulatoriais com os da admissão hospitalar. A contagem total de glóbulos brancos foi significativamente superior na ocasião da internação (p=0,001). Conclui-se que a saturação transcutânea média de oxigênio não foi capaz de identificar os pacientes que viriam a ser internados com STA.

A verificação da vitalidade pulpar depende de recursos semiotécnicos específicos, e, entre eles, os mais comumente empregados são os testes térmicos e elétrico. Tais testes apresentam limitações clínicas que interferem na análise e interpretação dos dados obtidos pelos mesmos. Os testes de sensibilidade são estímulos de origem térmica, elétrica ou mecânica aplicáveis ao dente e que são transmitidos às fibras nervosas sensitivas pulpares. Portanto, não leva em consideração a atividade circulatória do tecido pulpar e as condições de oxigenação, que são os reais indicadores da vitalidade do tecido. Nos casos de traumatismos dentários, por diversos fatores, a resposta pulpar se torna ainda mais difícil de obter. Assim, faz-se necessário avaliar o comportamento fisiológico pulpar através de testes denominados fisiométricos, destacando-se nesta área a oximetria de pulso, que é um método não invasivo e objetivo para determinação da saturação de oxigênio e taxa de pulso de um determinado tecido. Este estudo procurou estabelecer parâmetros para a utilização do oxímetro de pulso como teste de vitalidade pulpar, avaliando, comparativamente, os níveis de saturação de oxigênio obtidos do dedo indicador, de dentes controle positivo e de dentes permanentes traumatizados dos mesmos pacientes. Os dentes traumatizados apresentavam resposta negativa ao teste de sensibilidade pulpar com gás refrigerante e ausência de outro sinal ou sintoma indicativo de necrose pulpar. Os resultados mostraram que não houve diferença estatisticamente significante comparando-se as taxas de oxigenação dos dentes traumatizados nos três tempos (inicial, 30 e 60 dias) e que houve correlação entre as taxas de oxigenação do dedo indicador e dos dentes traumatizados e entre os dentes controle e os dentes traumatizados. Comparando-se as leituras obtidas neste estudo pode-se afirmar que taxas de oxigenação obtidas nos dentes traumatizados são confiáveis, permitindo ainda um monitoramento da condição pulpar ao longo do tempo. / The evaluation of pulp vitality depends on diagnosis methods. The most widely used are thermal and electric stimulation. However, thermal and electric testing has limitations in providing accurate diagnosis. These tests are subjective and depend upon perceived response of the patient to a stimulus, as well as the interpretation of that response by the dentist. The limitations with present pulp testing methods are that they only indirectly monitor pulp vitality by measuring neural responses and not circulation. For traumatized teeth, the pulp can be affected in a variety of ways as a function of the severity of the injury therefore, that teeth may not respond to vitality test and establishing an accurate and expedient diagnosis is even more complicated. Pulse oximetry is a completely objective test, requiring no sub jective response from the patient and directly measures the blood oxygen levels. This present study purpose was to evaluate the efficiency of pulse oximetry for testing pulp vitality by establishing correlation parameters between blood oxygen levels from the patient’s index finger, positive control teeth and traumatized permanent teeth which do not respond positively to thermal test with refrigerant spray and do not show any other sign or symptom of mortification. The results showed that there was no statistical significance between blood oxygen levels from traumatized teeth at the three different measure times (initial, 30 and 60 days) and there was a correlation between blood oxygen levels from index finger and the traumatized teeth and control teeth and traumatized teeth.