成人哮喘患者激素吸入降级治疗的标志物
2012/08/28
摘要
背景:对处于不同阶段的持续性哮喘,哮喘治疗指南均推荐采用激素吸入(ICS)作为一线治疗。然而,成人患者ICS剂量递减是否与哮喘控制的维持相符尚不清楚。此外,在哮喘维持控制的情况下,对于ICS的降级治疗尚未找到疗效的预测因子。
方法:90例中重度哮喘成人患者入选本研究,这些患者在过去6个月内无哮喘临床症状。所有患者ICS剂量减半,但继续使用其他哮喘治疗药物。将ICS递减后12个月内的哮喘是否有急性发作设为主要转归,对上述ICS递减治疗后哮喘维持控制12个月的患者、继续进行ICS递减的患者及停止ICS治疗的患者进行监测。
结果:40例(44.4%)患者ICS剂量减半后出现哮喘急性发作(首次发作时间为6.4 ± 3.6个月)。多变量logistic回归模型显示,ICS剂量递减但哮喘仍维持控制的预测因子排序为:乙酰胆碱(ACh)PC20(P<0.01)、ICS剂量减半之前无症状时间长短(P<0.01)、FeNO(P = 0.028)、第一秒用力呼气体积(FEV1)(%预测值)(P = 0.03)。50例患者中有39例患者在初始ICS减半后哮喘控制至少维持2年。
结论:对于AChPC20为20 mg/mL或10 mg/mL、无哮喘症状至少12个月或24个月的哮喘患者,可以成功递减ICS剂量,且长时间内不会增加哮喘急性发作。
(林江涛 审校)
Allergol Int. 2012 Jun 25;0(0). [Epub ahead of print]
Markers for Step-Down of Inhaled Corticosteroid Therapy in Adult Asthmatics.
Tsurikisawa N, Oshikata C, Tsuburai T, Mitsui C, Tanimoto H, Takahashi K, Sekiya K, Nakazawa T, Minoguchi K, Otomo M, Maeda Y, Saito H, Akiyama K.
Source
Clinical Research Center for Allergy and Rheumatology, National Hospital Organization Sagamihara National Hospital, Kanagawa, Japan.
Abstract
BACKGROUND: Treatment guidelines recommend the use of inhaled corticosteroids (ICS) as first-line therapy for all stages of persistent asthma. However, it is unknown whether ICS dose reduction in adult asthmatics is compatible with maintaining asthma control. Moreover, there are no predictors of efficacy in maintaining asthma control upon ICS reduction.
METHODS: We recruited 90 adult patients with moderate or severe asthma but no clinical symptoms of asthma for at least 6 months. All patients reduced their ICS doses by half but continued taking other asthma-related medications. As a primary outcome, we measured asthma exacerbations during the 12 months following ICS reduction. We also further monitored patients from the above study who had maintained total asthma control for 12 months after ICS reduction and who had continued on their reduced doses of ICS or had further reduced, or stopped, their ICS.
RESULTS: Forty of ninety patients (44.4%) experienced exacerbations after ICS reduction (time to first exacerbation: 6.4 ± 3.6 months). Multivariate logistic regression modeling revealed a rank order of predictors of success in ICS reduction while retaining asthma control: acetylcholine (ACh) PC(20)(p < 0.01); length of time with no clinical symptoms before ICS reduction (p < 0.01); FeNO (p = 0.028); and forced expiratory volume in 1 s (FEV(1); % predicted)(p = 0.03). Finally thirty-nine of 50 patients maintained total asthma control for at least 2 years after the initial ICS reduction.
CONCLUSIONS: In asthma patients with normalized AChPC(20) of 20mg/mL or 10mg/mL and no clinical symptoms for at least 12 or 24 months it may be possible to successfully reduce ICS without increasing exacerbations for long time.
Allergol Int. 2012 Jun 25;0(0). [Epub ahead of print]
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急诊室哮喘患儿激素吸入治疗的成本-效益分析
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