Bartfield J M, Ushkow B S, Rosen J M, Dylong K
Department of Emergency Medicine, Albany Medical College, New York.
Ann Emerg Med. 1994 Aug;24(2):256-9. doi: 10.1016/s0196-0644(94)70138-5.
To assess the correlation of single breath counting (SBC) and peak expiratory flow rate (PEFR) to forced expiratory volume in the first second (FEV1).
Prospective comparison of pulmonary function measurements.
University hospital pulmonary function test (PFT) laboratory.
Consenting patients scheduled to have PFTs May 1, 1992, through November 1, 1992.
SBC was measured by asking patients to take a deep breath and count as far as possible in their normal speaking voice without taking another breath. Counting was timed to a metronome set at 2 counts per second. A hand-held peak flowmeter was then used to measure PEFR. Standard PFTs then were performed.
Twenty-two patients were enrolled. The correlation of SBC to FEV1 (r = .68) was slightly better than of PEFR to FEV1 (r = .63). SBC was also found to correlate well with PEFR (r = .68).
SBC is a reasonable alternative to PEFR. Further investigation in an emergency department setting is warranted.
评估单次呼吸计数（SBC）和呼气峰值流速（PEFR）与第一秒用力呼气量（FEV1）之间的相关性。
肺功能测量的前瞻性比较。
大学医院肺功能测试（PFT）实验室。
1992年5月1日至1992年11月1日期间同意接受肺功能测试的患者。
通过要求患者深呼吸并尽可能用正常说话的声音计数而不再次呼吸来测量SBC。计数由设置为每秒2次计数的节拍器计时。然后使用手持式峰值流量计测量PEFR。接着进行标准肺功能测试。
招募了22名患者。SBC与FEV1的相关性（r = 0.68）略优于PEFR与FEV1的相关性（r = 0.63）。还发现SBC与PEFR相关性良好（r = 0.68）。
SBC是PEFR的合理替代方法。有必要在急诊科环境中进行进一步研究。
