Navegando por Palavras-chave "Oximetry"
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- ItemAcesso aberto (Open Access)Avaliação das medidas de oximetria de pulso em indivíduos sadios com esmalte de unha(Escola Paulista de Enfermagem, Universidade Federal de São Paulo (UNIFESP), 2011-01-01) Diccini, Solange [UNIFESP]; Pereira, Elizabete Mitsue [UNIFESP]; Im, Sonia Yoo; Shida, Lie Yamaguti [UNIFESP]; Bettencourt, Ana Rita de Cassia [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Unidade Básica de Saúde Programa Saúde da FamíliaOBJECTIVE: To evaluate the changes in measurements of pulse oximetry in healthy individuals with nail polish. METHODS: Cross sectional study with 80 healthy volunteers. The colors of enamel used to assess oxygen saturation (SpO2) were: coffee with milk, coffee, chocolate, red and plum. These colors were distributed among the finger nails of his left hand. The fingers of the right hand were the controls. RESULTS: The colors red (p = 0.047) and coffee (p = 0.024) showed lower values in SpO2 in comparison to the control. The other colors did not change the measurement of SpO2. CONCLUSION: The colors red and coffee caused reduction in the measurement of SpO2, but the clinical relevance of this finding is questionable, because the values were within the normal range.
- ItemAcesso aberto (Open Access)Oximetria do estômago: estudo comparativo entre vagotomia gástrica proximal e seromiotomia da curvatura gástrica menor anterior com vagotomia troncular posterior na úlcera duodenal crônica(Associação Médica Brasileira, 2002-12-01) Arasaki, Carlos Haruo [UNIFESP]; Martinez, Júlio César [UNIFESP]; Del Grande, José Carlos [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Delayed gastric emptying of solid food is greater after proximal gastric vagotomy (PGV) than after anterior lesser curve seromyotomy with posterior truncal vagotomy (ASPTV) and may be due to the hypoxia in the gastric wall and mainly in the gastric pacemaker. PURPOSE: To verify if operative devascularization of the lesser curve and the gastric fundus could affect the entire stomach and particularly the pacemaker area. METHODS: Measures of intraoperative oxyhemoglobin saturation (SpO2) were taken by pulse oximetry on the anterior gastric wall in 20 patients with chronic duodenal ulcer, randomly allocated in two groups of 10 individuals for surgical treatment, by PGV or ASPTV. RESULTS: Measurements, before partial fundoplication, showed that the area of the proximal lesser curve and the gastric fundus had a significant decrease in the SpO2 when compared to the gastric corpus (p < 0,05); the SpO2 was not reduced significantly by the procedures on the pacemaker area; the ligature of short gastric vessels, in association with PGV or ASPTV, reduced significantly the SpO2 (p < 0,05); and, PGV resulted in a SpO2 significantly lower than in ASPTV (p < 0,05). CONCLUSION: When PGV is associated with the ligature of the short gastric vessels, it causes acute ischemic changes in the proximal lesser gastric curve and in the fundus more intensively than ASPTV. The gastric pacemaker area does not present hypoxia immediately after operative procedures.
- ItemAcesso aberto (Open Access)Saturação venosa central e mista de oxigênio no choque séptico: existe diferença clinicamente relevante?(Associação de Medicina Intensiva Brasileira - AMIB, 2008-12-01) Machado, Flávia Ribeiro [UNIFESP]; Carvalho, Rosana Borges de [UNIFESP]; Freitas, Flavio Geraldo Rezende [UNIFESP]; Sanches, Luciana Coelho [UNIFESP]; Jackiu, Miriam [UNIFESP]; Mazza, Bruno Franco [UNIFESP]; Assunção, Murillo [UNIFESP]; Guimarães, Hélio Penna [UNIFESP]; Amaral, José Luiz Gomes do [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)INTRODUCTION: Central venous oxygen saturation (SvcO2) has been proposed as an alternative for mixed venous oxygen saturation (SvO2), with a variable level of acceptance according to available data. This study aimed to evaluate possible differences between SvO2 and SvcO2 or atrial venous saturation (SvaO2), with emphasis on the role of cardiac output and their impact on clinical management of the septic patient. METHODS: This is an observational, prospective study of patients with septic shock monitored by pulmonary artery catheter. Blood was obtained simultaneously for SvcO2, SvO2 and SvaO2 determination. Linear correlation (significant if p<0.05) and agreement analysis (Bland-Altman) were performed with samples and subgroups according to cardiac output. Moreover, agreement about clinical management based on these samples was evaluated. RESULTS: Sixty one measurements from 23 patients were obtained, median age of 65.0 (49.0-75.0) years and mean APACHE II of 27.7±6.3. Mean values of SvO2, SvcO2 and SvaO2 were 72.20±8.26%, 74.61±7.60% and 74.64±8.47%. Linear correlation test showed a weak correlation between SvO2 and SvcO2 (r=0.61, p<0.0001) and also between SvO2 and SvaO2 (r=0.70, p<0.0001). Agreements between SvcO2/SvO2 and SvaO2/SvO2 were -2.40±1.96 (-16.20 and 11.40) and -2.40±1.96 (-15.10 and 10.20), respectively, with no difference in the cardiac output subgroups. No agreement was found in clinical management for 27.8% of the cases, both for SvcO2/SvO2 and for SvaO2/SvO2. CONCLUSION: This study showed that the correlation and agreement between SvO2 and SvcO2 is weak and may lead to different clinical management.
- ItemAcesso aberto (Open Access)Valor da oximetria de pulso na avaliação da perfusão da mão para retirada da artéria radial: O teste de Allen é satisfatório?(Sociedade Brasileira de Cirurgia Cardiovascular, 1998-07-01) Dauar, Renato Bauab; Barros Junior, Newton de [UNIFESP]; Lima, Paulo Ruiz Lucio de; Kyiose, Alberto Takeshi; Leao, Luiz Eduardo Villaca [UNIFESP]; Succi, José Ernesto [UNIFESP]; Hospital Bandeirantes; Universidade Federal de São Paulo (UNIFESP)With the increasing utilization of the radial artery as a graft in CABG a reliable evaluation of the integrity of the palmar arch in each patient, is important in order to prevent classically vascular complications of the hand, one uses the Allen test, which is based on a subjective evaluation of the colour change of the hand, when the radial and ulnar pulse are pressed and, therefore, more prone to misinterpretations. For an objective evaluation, we propose this test, analyzing perfusion through pulse oxymetry, a simple method easily available in the operating room.Purpose: The authors present a new proposal to evaluate perfusion and integrity of the palmar arch by pulse oxymetry, comparing information obtained through method with the one obtained through the Allen test.Method: Fifty radial and 50 ulnar arteries from 25 patients in prone position were studied. Patients were 45 years or over, 19 males and 6 females, in stable cardiorespiratory conditions, and free of known peripheral vascular disease in the upper limbs. The oxymeter used was from Ohmeda, and the portable Doppler, with continuous flow from Medical Electronics. At first, the probe was put over the index finger of each hand sequentially observing the saturation level which we called initial. The Doppler was used for the radial and ulnar pulses. The Allen test was performed in each hand, digitally compressing both arteries, with the oxymeter in the second finger, observing the disappearance of the pulse wave. The ulnar artery was then released, causing the return of the pulse wave and obtaining the final saturation. In 96% of cases, there was a drop in saturation ranging from 0 to 2 points. The Doppler probe was located distally to the compression of the radial artery, showing no flow in it.Results: The Allen test proved to be satisfactory (return of colour to the hand in 5 seconds or less) in 35 procedures (70%), and unsatisfactory in 15 of them (30%). The oxymetry was normal in 49 procedures (98%), with an important saturation drop in just one case (2%), in which the Allen test was unsatisfactory.Conclusions: We observed a rather meaningful difference between the results from the Allen test and those from oxymetry, leading one to question the validity of the Allen test regarding its efficacy, since it is a subjective method compared to an objective one (oxymetry). Therefore, we could not be using the radial artery as a graft in 26% of the cases evaluated through the Allen test.