Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31571
Title: Lung meridian acupuncture point skin impedance in asthma and description of a mathematical relationship with FEV1
Authors: Ngai, SPC
Jones, AYM
Cheng, EKW 
Keywords: Asthma
Skin impedance
Acupuncture point
Issue Date: 2011
Publisher: Elsevier Science Bv
Source: Respiratory physiology & neurobiology, 2011, v. 179, no. 2-3, p. 187-191 How to cite?
Journal: Respiratory Physiology & Neurobiology 
Abstract: Alteration in acupoint skin impedance is purportedly associated with health impairment. This study examined lung meridian acupoint skin impedance in healthy individuals and patients with controlled asthma and the relationship if any with Forced Expiratory Volume in 1 s (FEV1). Twenty-eight subjects diagnosed with asthma and 28 age and gender-matched healthy subjects had their FEV1 and skin impedance, at acupoints LU 7 (Lieque) and LU 9 (Taiyuan) on the lung meridian, measured. Skin impedance was significantly higher in subjects with asthma (p < 0.05) and negatively correlated with percent predicted FEV1 (r = -0.34 to -0.40, p < 0.005). The Receiver Operating Characteristic (ROC) suggested the cutoff point for logarithm-transformed mean of skin impedance for asthma was >= 3.59 unit (sensitivity = 82.1%, specificity = 82.1%) (AUC = 0.878, p < 0.001). A regression prediction equation of asthma was derived. This study suggests that acupoint skin impedance on the lung meridian may reflect the asthma condition. The use of skin impedance as an adjunctive, objective assessment in asthma screening and treatment monitoring, warrants further investigation.
URI: http://hdl.handle.net/10397/31571
ISSN: 1569-9048
DOI: 10.1016/j.resp.2011.08.004
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