medigraphic.com

2007, Number 2

<< Back Next >>

Rev Mex Ing Biomed 2007; 28 (2)

Measurement of electrical skin impedance in the frequency spectrum of 5 to 1,000 Hz

Araiza LH, Muñoz GR

Language: Spanish
References: 7
Page: 77-82
PDF size: 137.97 Kb.


ABSTRACT

The skin has electrical properties that affect the bioelectrical signals quality when they are recorded by surface electrodes. The skin has electrical impedance due its physical and physiological characteristics. In this paper the results of skin impedance are represented in Cole-Cole graphics for A, B, C at different time. The technique used to impedance measurement was the three electrodes applying a constant current in the frequency spectrum 5 to 1,000 Hz. The skin impedance was different of person to person (A, B, C). The skin impedance results were since 406.7K Ohms for 5 Hz to 23 K Ohms for 1,000 Hz. The electrodes were Ag/AgCl cup 9 mm diameter. The acquisition board was programmed in LabView 6.1.


REFERENCES

  1. Rosell J, Colominas J, Pere R, Pallas-Areny R, Webster JG. Skin Impedance from 1 Hz to 1MHz, IEEE Trans. Biomed Eng 1988; 35(8): 649-651.

  2. Valentinuzzi ME. Bioelectrical Impedance Techniques in Medicine. Critical Reviews in Biomedical Engineering 1996; 24(4-6): 223-255, 416-418, 505-538.

  3. Lackermeir AH, McAdams ET, Moss G, Woolfson AD. In vivo ac Impedance Spectroscopy of Human Skin, in electrical Bioimpedance Methods: Applications to Medicine and Biotechnology, NJ: Annals of the New York Academy of Sciences, 1999; 873: 197-213.

  4. Webster JG. Impedance versus Frequency, in Electrical impedance Tomography, J. G. Webster, Ed. Adam Hilger, NJ: Bristol and New york, 1990, ch. 3, pp. 23–24.

  5. Implementation and Applications of Current sources and current receivers Application, Bulletin, SBOA046, Burr-Brown, Texas instruments, 2000: 20-22. http://www.ti.com.

  6. Ackmann JJ, Seitz MA. Methods of Complex Impedance Measurements in Biologic Tissue, in CRC, Critical Reviews in Biomedical Engineering 1984-1986; 11(4): 281-310.

  7. Casas PJO. Contribución a la obtención de imágenes paramétricas en tomografía de impedancia eléctrica para la caracterización de tejido biológicos, Tesis de Doctorado. Universidad Politécnica de Cataluña, 1998. http://petrus.upc.es/~wwwdib/tesis/Oscar/resumen.html




2020     |     www.medigraphic.com