Strayhorn V, Leeper K, Tolley E, Self T
Department of Clinical Pharmacy, University of Tennessee, Memphis 38163, USA.
Chest. 1998 Apr;113(4):1134-6. doi: 10.1378/chest.113.4.1134.
To determine if peak expiratory flow (PEF) is higher using incorrect technique versus correct technique with five marketed peak flowmeters.
Randomized, nonblinded study.
University pulmonary medicine clinic.
Twenty adults with clinically stable asthma.
After inhaling 2 puffs of albuterol via a valved aerosol holding chamber (Aerochamber), patients were instructed over the next 15 min in correct and incorrect (a "spitting" action) technique when using peak flowmeters. Order of use of five peak flowmeters and correct vs incorrect technique was random.
PEF (percentage of personal best) was recorded for best of three attempts with correct and incorrect technique. Each peak flowmeter had a statistically significant elevation in PEF with incorrect technique. The range for elevation in PEF using incorrect technique was 12.4 to 68.2% above the PEF with the subject using correct technique.
Each of the five marketed peak flowmeters had a significant elevation in PEF when a "spitting action" was used. Clinicians need to instruct patients carefully regarding correct technique when using peak flowmeters.
使用五种市售的峰值流量计，确定采用错误技术与正确技术时呼气峰值流速（PEF）是否更高。
随机、非盲法研究。
大学肺科诊所。
20名临床病情稳定的成年哮喘患者。
通过带阀气雾剂储物罐（爱全乐储物罐）吸入2喷沙丁胺醇后，在接下来的15分钟内指导患者在使用峰值流量计时采用正确和错误（“吐痰”动作）技术。五种峰值流量计的使用顺序以及正确与错误技术均为随机安排。
记录采用正确和错误技术进行三次尝试中的最佳PEF（个人最佳值的百分比）。使用错误技术时，每种峰值流量计的PEF均有统计学意义的升高。使用错误技术时PEF升高的范围比患者使用正确技术时的PEF高出12.4%至68.2%。
当采用“吐痰动作”时，五种市售峰值流量计中的每一种的PEF均有显著升高。临床医生在患者使用峰值流量计时需要仔细指导其正确技术。
