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ABSTRACT
Title: The challenger: continuous and differential acquisition of Blood Pressures
during Tilt Table Test
Simposio: Tecnologías Médicas e Industria 4.0
Authors: Carmenchu Regueiro Busoch1, Adianet Quintana Roque2, Yamel Jesús Almeida
Pichardo3, Luis Antonio Noa Lloren4, Carmen Busoch Morlán5, Angel Regueiro-Gómez6
Affiliations:
1,5 Department of Automatic and Computation, School of Automatic and Biomedical Engineering,
Universidad Tecnológica de La Habana (Cujae)
2,3,4,6 Department of Bioengineering (CEBIO), School of Automatic and Biomedical Engineering, Universidad
Tecnológica de La Habana (Cujae)
Keywords: Tilt Table Test, Blood Pressure, continuous-differential acquisition, spectral-time indicators
Introduction: The cardiovascular illnesses are among the first causes of death at
international level depending of numerous factors related with the habitat and the
feeding, among others. For this diagnostic study, especially in old people (> 60 years), it's
necessary to induce the answer of the Cardiovascular System (CS) and generally the clinical
specialist use the Tilt Table Test, which allows the detection of the vagal syncope and other
cardiovascular illnesses. During these clinical tests exist the necessity of a continuous
record of Blood Pressure (BP), and nowadays the specialists only determine some
instantaneous values (maximum, minimum and median pressure) related with different
angles of inclination. Objective: This work proposes the characterization of a new system
for the continuous and differential record of blood pressure in patients during the tilt tests.
Materials and methods: The figure 1 shows the architecture of the new biomedical
system as research support in the tilt table test (TTT). This system employs pressure
transducers, a measurement channel, control unit and a virtual instrument developed in
LabVIEW (interface to control and visualization of records acquired).
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Results: The new system acquired continuous records of the arterial blood pressure in 25
subjects during the Tilt Table Test. We observed the different answers of the variable
between the fellow's extremities in the different phases and angles of inclination (Fig. 2).
This beauvoir can be relate with cardiovascular illnesses, such as, vagal syncope and others.
Figure 2. Results obtained (Left: example of continuous and differential records of arterial blood pressure
in subjects, Right: Tacogram of records associated to ABP & ECG).
During the temporal processing of blood pressure records, we obtain new indicators, such
as, the variability of the cardiovascular frequency, and others (meanHR, meanMM, SDMM,
pMM50, and others), equivalent to classical indicators in cardiology study, what allows to
simplify and to improve the classic systems for these studies. Conclusions: This research
has allowed to have a new system to support the clinical characterization of the behavior
from the cardiovascular system of subjected during to Tilt Table Tests, showing good
robustness at a reasonable cost with a decrease of the current technological complexity,
and allowing to improve with new indicators the diagnostic complex of cardiovascular
illnesses such as the syncope vagal and others.
Contact: Carmenchu Regueiro Busoch (Email: carmenchu@automatica.cujae.edu.cu)
Figure 1. System to dynamic characterization of cardiovascular variables.