Browsing by Subject "Patient monitoring"

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    Contact-free measurement of respiratory rate using infrared and vibration sensors
    (Elsevier BV, 2015) Erden, F.; Alkar, A. Z.; Çetin, A. Enis
    Respiratory rate is an essential parameter in many practical applications such as apnea detection, patient monitoring, and elderly people monitoring. In this paper, we describe a novel method and a contact-free multi-modal system which is capable of detecting human breathing activity. The multimodal system, which uses both differential pyro-electric infrared (PIR) and vibration sensors, can also estimate the respiratory rate. Vibration sensors pick up small vibrations due to the breathing activity. Similarly, PIR sensors pick up the thoracic movements. Sensor signals are sampled using a microprocessor board and analyzed on a laptop computer. Sensor signals are processed using wavelet analysis and empirical mode decomposition (EMD). Since breathing is almost periodic, a new multi-modal average magnitude difference function (AMDF) is used to detect the periodicity and the period in the processed signals. By fusing the data of two different types of sensors we achieve a more robust and reliable contact-free human breathing activity detection system compared to systems using only one specific type of sensors.
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    Serum adenosine deaminase levels in patients with brucellosis and in healthy subjects
    (TÜBİTAK, 2004) Cesur, S.; Sunguroğlu, K.; Ahmed, Kamruddin; Tezeren, D.; Keseci, N. O.; Aksaray, S.
    The aim of this study was to determine the serum adenosine deaminase (ADA) levels in patients with brucellosis and compare them with the results of healthy individuals. Forty-eight subject were enrolled in this study : 34 patients with brucellosis and 14 healthy individuals. Serum ADA activity was assessed by spectrophotometer in patients with brucellosis and statistically compared with that of healthy individuals. A normal range of serum ADA was considered 5-35 IU/I. Serum ADA levels were also compared with Brucella agglutinations titers and serum C reactive protein (CRP). Serum ADA levels were found to be significantly higher in patients with brucellosis than in healthy individuals (43.45 ±24.19 IU/I and 27.5 ± 9.3 IU/I, respectively) (P < 0.01). Serum ADA activity did not show any correlation between the Brucella agglutination titer and CRP level. Serum ADA level showed significant alterations in patients with brucellosis compared to healthy subjects. We concluded that serum ADA level may be used in the follow up of patients with brucellosis together with clinical and other laboratory findings.