A novel screening method for influenza patients using a newly developed non-contact screening system

作者：Matsui Takemi^*; Hakozaki Yukiya; Suzuki Satoshi; Usui Takahiro; Kato Takehito; Hasegawa Kousuke; Sugiyama Youhei; Sugamata Masami; Abe Shigeto

来源：Journal of Infection, 2010, 60(4): 271-277.

DOI：10.1016/j.jinf.2010.01.005

• Non-contact
• Screening
• Infection
• Pandemic influenza
• Microwave radar
• Thermography
• Heart rate
• Respiratory rate

Objectives: In places of mass gathering, rapid infection screening prior to definite diagnosis is vital during the epidemic season of a novel influenza. In order to assess the possibility of clinical application of a newly developed non-contact infection screening system, we conducted screening for influenza patients.
Materials and methods: The system is operated by a screening program via a linear discriminant analysis using non-contact derived variables, i.e., palmar pulse derived from a laser Doppler blood-flow meter, respiration rate determined by a 10-GHz microwave radar, and average facial temperature measured by thermography. The system was tested on 57 seasonal influenza (2008-2009) patients (35.7 degrees C <= body temperature <= 38.3 degrees C, 19-40 years) and 35 normal control subjects (35.5 degrees C <= body temperature <= 36.9 degrees C, 21-35 years) at the Japan Self-defense Forces Central Hospital.
Results: A significant linear discriminant p < 0.001) was determined to distinguish the influenza group from the control group (Mahalanobis D-square = 6.5, classification error rate > 10%). The system had a positive predictive value (PPV) of 93%, which is higher than the PPV value (PPV <= 65.4%) reported in the recent summary of studies using only thermography performed mainly in hospitals.
Conclusions: The proposed system appears promising for application in accurate screening for influenza patients at places of mass gathering.

• 出版日期2010-4