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A Study on Clinical Applicability of Dyspnea Index and 6-Minute Walking Test in Patients Complaining of Dyspnea FREE TO VIEW

Hong Lyeol Lee, MD; HaeSung Nam, MD; Jaehwa Cho, MD; JeongSeon Ryu, MD
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Inha University Hospital, Incheon, Korea (the Republic of)

Chest. 2015;148(4_MeetingAbstracts):1023A. doi:10.1378/chest.2220213
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SESSION TITLE: Signs and Symptoms of Chest Diseases Posters

SESSION TYPE: Original Investigation Poster

PRESENTED ON: Wednesday, October 28, 2015 at 01:30 PM - 02:30 PM

PURPOSE: Dyspnea is a common complaint of patients, yet. Its severity may not correlate well with those of an underlying disease or physiologic test. It may be difficult to evaluate the dyspnea completely. Clinical scales can give sensitive and complementary information on physiologic measurements. The walking test (WT) has proved to be reproducible and useful in evaluating the efficacy of pharmacologic treatments.

METHODS: We measured dyspnea indices (modified Borg scale dyspnea index (MBS), baseline dyspnea index (BDI)) and the distance patients could walk in 6 minutes, in 39 patients who visited our hospital because of dyspnea, before and after treatment. Pulmonary function test and arterial blood gas studies were done as well. Through the above method, we examined the clinical usefulness of the dyspnea index, WT, and the correlation between the tests.

RESULTS: In all patients, all values following treatment improved significantly except PaCO2. The pretreatment values of MBS, BDI, and WT, and the posttreatment values of MBS and WT, showed significant correlations with values of FEV1 (liters or % predicted normal, or both). In patients with COPD, the values of MBD, BDI, WT and FVC improved significantly. The pretreatment values of WT correlated significantly with those of FEV1, FVC and PaO2. The posttreatment values of BDI also correlated significantly with those of PaO2, PaCO2, and the result of WT was similar with FEV1, FVC, PaO2, and PaCO2. In patients with bronchial asthma, all values except FEF25-75% and PaCO2 improved significantly. The values of WT and FEF25-75% showed significant correlation in the pretreatment, posttreatment and changed values between pretreatment and posttreatment values. The posttreatment values of MBS and BDI correlated significantly with that of FEV1.

CONCLUSIONS: Posttreatment WT values improved significantly in all patients and in patients with COPD or bronchial asthma. WT correlated significantly with FEV1, FVC, and PaO2 in patients with COPD, and with FEF25-75% in patients with bronchial asthma. Significant correlations were also observed between MBS and FEV1 in all patients. BDI and WT correlated well except the changed values between pretreatment and posttreatment values.

CLINICAL IMPLICATIONS: A main goal in most patients with chronic lung disease is to relieve dyspnea. Dyspnea index and WT were proven useful for evaluating treatment efficacy, and especially in patients with COPD, they were sensitive. Therefore, they can be valuable supplements to physiologic tests.

DISCLOSURE: The following authors have nothing to disclose: Hong Lyeol Lee, HaeSung Nam, Jaehwa Cho, JeongSeon Ryu

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