Monitoring the impact of pressure on the assessment of skin perfusion and oxygenation using a novel pressure device

Jessica C. Ramella-Roman, Thuan Ho, Du Le, Pejhman Ghassemi, Thu Nguyen, Alison Lichy, Suzanne Groah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Skin perfusion and oxygenation is easily disrupted by imposed pressure. Fiber optics probes, particularly those spectroscopy or Doppler based, may relay misleading information about tissue microcirculation dynamics depending on external forces on the sensor. Such forces could be caused by something as simple as tape used to secure the fiber probe to the test subject, or as in our studies by the full weight of a patient with spinal cord injury (SCI) sitting on the probe. We are conducting a study on patients with SCI conducting pressure relief maneuvers in their wheelchairs. This study aims to provide experimental evidence of the optimal timing between pressure relief maneuvers. We have devised a wireless pressure-controlling device; a pressure sensor positioned on a compression aluminum plate reads the imposed pressure in real time and sends the information to a feedback system controlling two position actuators. The actuators move accordingly to maintain a preset value of pressure onto the sample. This apparatus was used to monitor the effect of increasing values of pressure on spectroscopic fiber probes built to monitor tissue oxygenation and Doppler probes used to assess tissue perfusion.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8576
DOIs
StatePublished - 2013
Externally publishedYes
EventOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIII - San Francisco, CA, United States
Duration: Feb 2 2013Feb 3 2013

Other

OtherOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIII
CountryUnited States
CitySan Francisco, CA
Period2/2/132/3/13

Keywords

  • fiber optics probe
  • oxygenation
  • perfusion
  • Pressure release maneuvers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Ramella-Roman, J. C., Ho, T., Le, D., Ghassemi, P., Nguyen, T., Lichy, A., & Groah, S. (2013). Monitoring the impact of pressure on the assessment of skin perfusion and oxygenation using a novel pressure device. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 8576). [85760N] https://doi.org/10.1117/12.2006256