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A hermetically sealed cardiac dimension transducer for long-term animal implantation.

Publication ,  Journal Article
Olsen, CO; Abert, SJ; Glower, DD; Spratt, JA; Tyson, GS; Davis, JW; Rankin, JS
Published in: Am J Physiol
November 1984

Pulse transit sonomicrometry is a well-accepted method for assessing cardiac dimensions and function in research animals. Unfortunately, this technique has been hampered in chronic applications by a significant incidence of transducer failure secondary to leakage of corrosive biological fluids into the piezoelectric material. The fluid leakage generally occurred at the interface between the encapsulating epoxy and the bioelectric cable and resulted in progressive functional deterioration with time. In this paper, a new hemispheric ultrasonic dimension transducer is described with a mechanical hermetic seal at the bioelectric cable-transducer interface. The hermetically sealed transducers withstood 400 psi compressed air without leakage, while conventional transducers routinely leaked at 60 psi. The performance characteristics of the new transducers were similar to those previously reported with omnidirectional designs, and no failures have occurred during 3 yr of experience with repeated transducer implantations.

Duke Scholars

Published In

Am J Physiol

DOI

ISSN

0002-9513

Publication Date

November 1984

Volume

247

Issue

5 Pt 2

Start / End Page

H857 / H860

Location

United States

Related Subject Headings

  • Ultrasonics
  • Transducers
  • Prostheses and Implants
  • Heart
  • Equipment Design
  • Cardiovascular System & Hematology
  • Animals
 

Citation

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ICMJE
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Olsen, C. O., Abert, S. J., Glower, D. D., Spratt, J. A., Tyson, G. S., Davis, J. W., & Rankin, J. S. (1984). A hermetically sealed cardiac dimension transducer for long-term animal implantation. Am J Physiol, 247(5 Pt 2), H857–H860. https://doi.org/10.1152/ajpheart.1984.247.5.H857
Olsen, C. O., S. J. Abert, D. D. Glower, J. A. Spratt, G. S. Tyson, J. W. Davis, and J. S. Rankin. “A hermetically sealed cardiac dimension transducer for long-term animal implantation.Am J Physiol 247, no. 5 Pt 2 (November 1984): H857–60. https://doi.org/10.1152/ajpheart.1984.247.5.H857.
Olsen CO, Abert SJ, Glower DD, Spratt JA, Tyson GS, Davis JW, et al. A hermetically sealed cardiac dimension transducer for long-term animal implantation. Am J Physiol. 1984 Nov;247(5 Pt 2):H857–60.
Olsen, C. O., et al. “A hermetically sealed cardiac dimension transducer for long-term animal implantation.Am J Physiol, vol. 247, no. 5 Pt 2, Nov. 1984, pp. H857–60. Pubmed, doi:10.1152/ajpheart.1984.247.5.H857.
Olsen CO, Abert SJ, Glower DD, Spratt JA, Tyson GS, Davis JW, Rankin JS. A hermetically sealed cardiac dimension transducer for long-term animal implantation. Am J Physiol. 1984 Nov;247(5 Pt 2):H857–H860.

Published In

Am J Physiol

DOI

ISSN

0002-9513

Publication Date

November 1984

Volume

247

Issue

5 Pt 2

Start / End Page

H857 / H860

Location

United States

Related Subject Headings

  • Ultrasonics
  • Transducers
  • Prostheses and Implants
  • Heart
  • Equipment Design
  • Cardiovascular System & Hematology
  • Animals