Background: Pulse oximetry is a noninvasive method to measure the saturation of peripheral oxyhaemoglobin (SpO2). It's usually used in emergency, intensive care and operating room units. Pulse oximeter readings have limited accuracy in the presence of methemoglobin, carboxyhemoglobin, anaemia, peripheral vasoconstriction, nail polish, fluorescent light, and motion. Objectives: To evaluate the interferences of the color of nail polishes and time on SpO2 in healthy individuals. Methods: Sixty-one healthy female volunteers, ages ranging from 18 to 32 years. The nail polish colors used to evaluate SpO2 were: base coat on the little finger, light pink on the ring finger, sparkling light pink on the medium finger and red on the thumb. The index finger was used as control and thus, did not receive nail polish. The time for each color was evaluated every minute until 5 minutes were completed. Results: When the SpO2 measurement was compared with the control, the base coat (p = 0.56), light pink (p = 0.56) and sparkling light pink (p = 0.37) colors didn't present statistically significant differences. Only the red presented a significant variation (p < 0,001), however it was within normal parameters. SpO2 didn't vary significantly with time. Conclusion: Despite the difference found with the red color, all the SpO2 values achieved were inside the normal range for a healthy individual. Pulse oximeter readings are not significantly affected by the color of nail polish in relation to time.

Keywords: Nail polish. Oxygen saturation. Pulse oximetry.

Background: Asthma education programs induce better asthma control and are one of main recommendations in guidelines. The programs recommendations should include a nurse in the educational team applying the structured program. The purpose of the intervention is to bring a change in the daily life of the patient and the family in order to improve disease control and quality of life. Aim: To standardize and apply a structured post-consultation model as part of multidisciplinary care in an educational program for asthmatic patients seen at the outpatient clinic of a public hospital, and to monitor the changes in asthma knowledge and quality of life. Methods: A longitudinal prospective study over six months with regular visits at four week intervals (total = 6 visits), conducted at the outpatient department of Unifesp/EPM/HSP, and the patients were included after signing a consent form. The asthma structured educational plan was conducted by a multidisciplinary team and addressed the following issues: what is asthma, relief and prevention medicines, daily report of symptoms and dyspnea score, training of the correct use of inhaled medication, discussion and actions regarding triggering factors and how to avoid them, and tips to recognize the signals of uncontrolled asthma. A standard questionnaire about general knowledge on asthma and a quality of life questionnaire were applied at the beginning, during the course, and at the end of the program. Results: 26 asthmatics were followed over six months and showed a statistically significant improvement in their identification and management of asthma skills as well as better quality of life indices. Conclusion: The model of care and the approach and training techniques were adequate and useful in the development of a structured educational program for socially deprived patients.

Objective: To evaluate and correlate the quality of life (QoL) of COPD patients on long-term home oxygen therapy (LTOT) with their sociodemographic/clinical characteristics and level of dependence. Methods: This was a cross-sectional analytical study involving COPD patients on LTOT followed at the Oxygen Therapy Outpatient Clinic of the Federal University of São Paulo Hospital São Paulo, in the city of São Paulo, Brazil. Sociodemographic, clinical, and biochemical data were collected. We assessed QoL and level of dependence using the Medical Outcomes Study 36-item Short-Form Health Survey (SF-36) and the Katz index, respectively. Multiple linear regression models were constructed in order to determine the influence of these variables on QoL. Results: We included 80 patients in the study. The mean age was 69.6 ± 9.1 years, and 51.3% were female. The lowest SF-36 scores were for the physical functioning and role-physical domains. All sociodemographic characteristics (except gender) were found to correlate significantly with the SF-36 domains mental health, vitality, role-physical, and social functioning. We also found that body mass index, PaO2, post-bronchodilator FEV1, hemoglobin, and Katz index correlated significantly with the physical functioning, mental health, role-physical, and bodily pain domains. In addition, oxygen flows were found to correlate negatively with the physical functioning, mental health, vitality, and role-emotional domains. Conclusions: Low scores for SF-36 domains, as well as the variables that negatively influence them, should be considered and analyzed during the development and implementation of strategies for improving the QoL of COPD patients on LTOT.

Keywords: Pulmonary disease, chronic obstructive; Quality of life; Oxygen inhalation therapy.