SESSION TYPE: Physiology/PFTs/ Rehabilitation Posters
PRESENTED ON: Wednesday, October 24, 2012 at 01:30 PM - 02:30 PM
PURPOSE: The aim of this study was to determine the efficacy of repeated pulmonary function tests (PFT) on the measurements, in order to examine the impact of patient compliance, and whether they are affected at the second attempt according to the first PFT results.
METHODS: All patients consulted to our clinic for preoperative evaluation between April 2006 and January 2010, were asked to perform the “best-of-three” pulmonary function test twice, within the same day with at least 10 minutes intervals. Differences of forced vital capacity (FVC) and 1st second forced expiratory volume (FEV1) between the two measurements are compared.
RESULTS: All patients consulted to our clinic for preoperative evaluation between April 2006 and January 2010, were asked to perform the “best-of-three” pulmonary function test twice, within the same day with at least 10 minutes intervals. Differences of forced vital capacity (FVC) and 1st second forced expiratory volume (FEV1) between the two measurements are compared. Results: One thousand patients with age average of 50 (range 7-89) are taken to the study. 423 of them had no pulmonary function testing done before. Due to the repeated function tests, results were increased in 573 (57,3%) vs 551 (55,1%) patients, remained the same in 123 (12,3%) vs 113 (11,3%), and decreased in 304 (30,4%) vs 336 (33,6%) on FEV1 and FVC variables, respectively. The overall improvement achieved was 1,57% for FEV1 and 1,42% for FVC. Significant difference of FEV1 improvement was seen between patients with previous experience of PFT and the first-timers (1,11% vs 2,20%; p=0,014).
CONCLUSIONS: It should be kept in mind that repeated PFT measurements ensure a better patient education, thus facilitating the patient to be more cooperative during testing process, particularly for the ones who are doing the test for the first time. Consciousness and learned behavior of the patient positively reflects to the test results, especially on FEV1 measurements. This progress may be important for preoperative evaluation or follow-up, and furthermore can be decisive for treatment of choice for patients with borderline PFT results.
CLINICAL IMPLICATIONS: PFT should be done at least twice, in order to achieve a more precise result, especially for patients with no history of previous testing.
DISCLOSURE: The following authors have nothing to disclose: Serdar Evman, Korkut Bostanci, Kafiye Ediz, Bedrettin Yildizeli, Hasan Batirel, Mustafa Yuksel
No published information in English is available in recent literature so far, on the effectiveness of repetitive pulmonary function test. The gold-standard “best of three” may have to be altered to “best-of-six” after more prospective clinical trials with large patient volumes. Umraniye Training and Research Hospital, Istanbul, Turkey