Wyniki wyszukiwania - BazTech

1

Usprawnienie procesu kontrolno-diagnostycznego u pacjenta respiratorozależnego - prototyp urządzenia do zdalnego monitoringu chorego

Siemianowski P., Mikołajczyk K., Topoliński T.

Aktualne Problemy Biomechaniki

|

2016

|

z. 11

109--114

PL

Niniejsza praca przedstawia możliwości usprawnienia aspektu kontrolno-diagnostycznego pacjentów wentylowanych mechanicznie w warunkach domowych z wykorzystaniem autorskiego systemu pod nazwą „Asystor Wentylacji Pacjenta”. Pozwala on, w sposób nieograniczony miejscem ani czasem, na dostęp do aktualnych parametrów i wskaźników oddechowych rekonwalescenta oraz bieżącą kontrolę pracy wykorzystywanego w leczeniu respiratora. Ponadto pozwala zrozumieć najistotniejsze korzyści wynikające z zastosowania elementów telemedycyny w terapii pacjenta respiratorozależnego.

EN

This paper presents the possibility of improving the aspect of control and diagnostics patients, who are long-term mechanically ventilated at home with use of a proprietary system called "Asystent Wentylacji Pacjenta”. It allows unlimited, by time or place, access to the current parameters and indicators of respiratory process and current control of work of a respirator which is used in the treatment. In addition, it allows us to understand the most important benefits of using elements of telemedicine in the treatment of a patient who used the respirator.

2

A new control solution for independent synchronous ventilation of lungs

Darowski M., Michnikowski M., Nestorowicz A., Mikaszewska-Sokolewicz M., Glapiński J., Guć M., Stankiewicz B.

Biocybernetics and Biomedical Engineering

|

2010

|

Vol. 30, no. 2

29-39

EN

A new control solution for independent, synchronous ventilation of lungs has been developed and a controller to perform it with use of only one respirator and a bilumen intubation tube has been built. The controller enables division of the inspiratory tidal volume between the lungs in desired ratio, and setting of the positive end-expiratory pressure (PEEP) separately for each lung. The model tests have shown that the characteristics of the flow meters used, however not linear, is good enough to achieve clinically accepted accuracy of volume division. The tests have shown that the volume division is independent from the total tidal volume and PEEP. Maximal errors of the tidal volume division was less than 10%. The case study of patient after lung injury has shown significant improvement of the X-ray image and respiratory parameters (blood oxygenation, ventilatory pressures) during the independent ventilation of lungs with the use of the new device. The clinical study of 60 patients has shown that differences between actually realized volume division and the adjusted values are practically negligible.

3

The new hybrid pneumo-electrical piston model of lungs mechanics - preliminary tests

Kozarski M., Zieliński K., Pałko K. J., Stankiewicz B., Bożewicz D., Darowski M.

Biocybernetics and Biomedical Engineering

|

2009

|

Vol. 29, no. 3

3-18

EN

A design principle, construction and results of preliminary tests of a new hybrid physical-electrical model of lungs mechanics has been presented, The methods leading to development of lungs models of different complexity have been also included. The basic component of the model is a voltage controlled Bow source build up with a piston ~ cylinder system driven by a servomotor. This is used to develop a functional module playing a role of an impedance converter transforming an input electrical impedance Z0 of any electrical network connected to its electrical terminals into a pneumatic impedance Zin. Static and dynamic characteristics of the model connected to different pneumatic signal sources have been presented i.e. for the model connected with the respirator (expiration by the respiratory valve) and for the model with free unobstructed expiration. The very good dynamic features (time constant of the piston Bow source less than 1 ms) and a small resultant error of impedance conversion (less than 1%) enable the model to be applied in many application especially when new methods of lung ventilation are developed.

4

A hybrid model of the respiratory system

Michnikowski M., Glapiński J., Guć M., Gólczewski T., Darowski M.

Biocybernetics and Biomedical Engineering

|

2009

|

Vol. 29, no. 1

71-80

EN

The aim of this work is building a hybrid model of the human respiratory system which enables connecting the real clinical devices (respirators) with the computerized virtual lungs. A simulation of the artificial ventilation of lungs, with the use of the hybrid model and the Siemens Servo 900 respirator, was made. Waveforms of pressure inside the lungs, flow in the respiratory tract, and the lung volume during the simulated artificial ventilation were recorded. The compliance and resistance of the hybrid model of the respiratory system were calculated on the basis of the inspiratory pause algorithms and compared to the values set in the model. The initial tests have shown that the calculated values of the parameters differ by 20% (worst result) from the values set in the model. The model will enable the investigation of the different modes of lung ventilation, as well as educational presentation of the respirator-patient interaction.

5

A comparison of two methods for assessment of lung mechanical parameters

Pałko K. J.

Biocybernetics and Biomedical Engineering

|

2009

|

Vol. 29, no. 3

19-30

EN

Comparison tests of the added compliance method and the standard method for the assessment of mechanical parameters of respiratory system are presented in this paper. In the added compliance method, an additional external mechanical chamber as the added compliance is periodically connected to the respirator-lungs system, to determine the values of the mechanical parameters of the respiratory system. The software application for the system control and data acquisition is written in the LabView Environment. The results confirm that the added compliance method is sufficient to be used for the calculation of the total compliance of respiratory system during the artificial ventilation.

6

The respirator as a user of virtual lungs

Gólczewski T., Kozarski M., Darowski M.

Biocybernetics and Biomedical Engineering

|

2003

|

Vol. 23, no. 2

57-66

EN

The virtual respiratory system (VRS) is proposed for testing physical respirators, new methods of ventilatory support, and scientific hypotheses. VRS may be also helpful in students education and staff training. Method: VRS simulates the relationship between the air flow and the pressure. The main features of the model are: separation of the lungs and the chest, division of the lungs into five lobes, closing bronchi, gravity influence. Real-to-virtual converter is based on the gas flow source, which is controlled by the calculated value of the air flow that should exist, for the measured pressure being the VRS input. Results: several phenomena are discussed, e.g. the influence of compliance nonlinearity and resistance changeability on ventilation, the CPAP efficiency, differences in lobes ventilation, breathing frequency determination.

7

Influence of ventilatory mode on respiration parameters - investigation on virtual lungs

Gólczewski T., Darowski M.

Biocybernetics and Biomedical Engineering

|

2003

|

Vol. 23, no. 3

63-72

EN

In the paper influence of different artificial ventilation modes (pressure-controlled, volume-controlled with constant and with decelerating flow, and power-controlled, i.e. adaptive) on chosen respiratory parameters (peak and mean pressure in lungs, peak gas flow, distribution of lungs ventilation) were analyzed in cases of permanent and sudden obstruction. The comparison has proved that the adaptive mode generally has some advantages over routinely used ventilatory modes, if influence on all the respiratory parameters together is taken into account: all the parameters achieve moderate values for the adaptive mode, while at least one parameter achieves a big value for each other mode. Thus, the adaptive mode causes the smallest total health hazard.