Browsing by Author "Chabane, Lilia"

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Contribution dans la surveillance en continue de la pression artérielle
    (Université M'Hamed Bougara : Faculté de Technologie, 2023) Chabane, Lilia; Benlatrache, Mohamed(Directeur de thèse)
    La mesure précise de la pression artérielle est essentielle au traitement et à la gestion de nombreuses situations médicales. Il peut être produit par différentes méthodes. De nous jour, les tensiomètres utilisent des méthodes oscillométriques, qui utilisent différents algorithmes pour estimer la pression artérielle systolique et diastolique. Malheureusement, la précision de ces appareils reste discutable et les médecins préfèrent utiliser l'auscultation. Dans notre thèse, une nouvelle méthode oscillométrique est présentée. Où, un dispositif spécifique est conçu pour détecter et maintenir la pression du brassard au niveau de la pression artérielle moyen (PAM). Ensuite, un algorithme spécifique a été développé pour calculer en continu la tension artérielle systolique et diastolique battement par battement. La nouvelle méthode a été évaluée chez 20 sujets sains. Les résultats trouvés étaient liés à la moyenne de deux appareils pression artérielle validés, qui ont été considérés comme référence. Les résultats ont montré un coefficient de corrélation très élevé (r = 0,97), un coefficient de concordance presque parfait (kappa = 0,81) et un critère d'erreur absolue moyenne faible (3,43 mmHg) (classe A). La nouvelle méthode pourrait grandement améliorer la mesure de la pression artérielle à l'aide de méthodes oscillométriques
  • No Thumbnail Available
    Item
    Difference between Blood Pressure Measurement during Cuff Inflation and Deflation in the Oscillometric method
    (2021) Chabane, Lilia; Omari, Tahar; Latri, hibat Allah; Belatrach, Mohamed Salah
    The majority of automatic blood pressure (BP) measurement devices use the oscillometric method made during cuff inflation. However, there is currently little information available concerning the measurements during cuff inflation. This study aimed to provide this information. To achieve this goal, an oscillometic blood pressure device was developed with the ability to drive out the cuff pressure signal and the oscillometric waveforms. The both signals were recorded and processed simultaneously by a specific algorithm to get blood pressure measurements during cuff inflation and deflation. From 9 normotensive cases, the relationship between diastolic blood pressure (DBP), mean blood pressure (MBP) and systolic blood pressure (SBP) measurements during cuff inflation and deflation was compared. The results found confirm a positive linear regression found with a very strong correlation coefficient (R² = 0.97) in the case of MBP. Also, a strong one (R² = 0.81) is found in the case of DBP. However, a moderate R² is found in the case of SBP (R² = 0.60). These results confirm the feasibility of blood pressure measurement during cuff inflation particularly in the estimation of MBP and DBP, which can considerably reduce the duration of measurement from 1 or 2 minute to a few seconds.
  • No Thumbnail Available
    Item
    A new methodology of blood pressure measurement through the oscillometric method
    (IOP Publishing, 2021) Chabane, Lilia; Omari, Tahar; Benlatreche, Mohamed Salah; Bereksi-Reguig, Fethi
    Accurate measurement of blood pressure (BP) is of great importance in a medical diagnostic. It can be obtained by different methods. Nowadays, most BP devices use the oscillometric method which estimates systolic and diastolic BP through different algorithms. Unfortunately, the precision of these devices is always questioned and doctors prefer the use of traditional auscultatory-based methods. In this paper, a new oscillometric method for BP measurement is proposed. In fact, the proposed method is based on the design of a BP device which first detects and maintains the cuff pressure at the level of mean BP then the continuous determination of systolic and diastolic BP. device was assessed by measuring the systolic and diastolic BP on 20 healthy volunteers. The measured pressures were compared with those obtained by two commercially available BP devices. The results show a very high correlation coefficient (r = 0.97), an almost perfect agreement coefficient (kappa = 0.81), and a low mean absolute error (3.43 mmHg). The proposed methodology has a high probability to be complied with the Association for the Advancement of Medical Instrumentation and the British Hypertension Society (Grade A) standards, and can greatly improve the measurement of blood pressure using the oscillometric approach