Evaluation of respiratory impairment in patients with systemic lupus erythematosus with the six-minute walk test

Marivone Arruda Leite, Mônica Corso Pereira, Lílian Tereza Lavras Costallat, Wander de Oliveira Villalba, Marcos Mello Moreira, Ilma Aparecida Paschoal
2014 Revista Brasileira de Reumatologia (English Edition)  
Six-minute walk test Oxygen saturation Respiratory function test Questionnaires a b s t r a c t Objective: Evaluate SLE stable patients, without overt respiratory compromise, by means of 6MWT. Casuistic and methods: Forty-five stable SLE patients were enrolled. The ATS/ERS protocol for 6MWT, was used and two parameters with cut-off points were chosen. Results: Forty-two patients were women. The mean age was 39 ± 11.4 years; mean duration of disease, 121 ± 93.1 months; mean value of MRC, 2 ± 0;
more » ... lue of MRC, 2 ± 0; mean FVC, 85.9 ± 34.2%; mean FEV1, 67.5 ± 21.6%; mean MIP, 82 ± 58.4%; mean MEP, 78 ± 37.3%; mean heart rate at rest, 75 ± 12.8 bpm; mean respiratory rate at rest, 19 ± 5.3 bpm; mean 6MWD, 478 ± 82 m; mean SpO2 at rest was 98 ± 0.8%; mean fall in SpO2, 4 ± 6 points. When the study population was divided according to the 400-m walk distance cut-off value, the heart rate immediately before the test was significant lower in those participants who walked less than 400 m (p = 0.0043), just like the value of Borg scale (p = 0.0036); according to the presence of saturation ≥ 4, heart rate at the end of the test was significantly higher in those participants who were showing desaturation (p = 0.0170); MEP (p = 0.0282) and 6MWD (p = 0.0291) were significantly lower, and MIP showed a tendency towards being smaller (p = 0.0504). FVC < normal inferior limit was significantly associated with the group with desaturation (p = 0.0274). Conclusion: Compared to 6MWD, desaturation was better suited to find the patients with the most compromised indexes in respiratory function tests. nuir (p = 0,0504). CVF < limite inferior do normal foi achado significativamente associado com o grupo com dessaturação (p = 0,0274). Conclusão: Comparado com TC6M, a dessaturação foi o indicador mais apropriado para localizar os pacientes com os índices mais comprometidos nos testes de função respiratória.
doi:10.1016/j.rbre.2014.02.017 fatcat:z2bc6j3ujrcafanwtkt5myn2k4