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Related Experiment Video

Updated: Feb 21, 2026

Real-Time Assessment of Spinal Cord Microperfusion in a Porcine Model of Ischemia/Reperfusion
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Exploring pressures, tissue reperfusion and body positioning: a pilot evaluation.

F Coyer1, M Clark2, P Slattery3

  • 1Professor of Nursing, Joint appointment, Intensive Care Services, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia; School of Nursing, Faculty of Health, Queensland University of Technology, Herston, Queensland, Australia; Institute of Skin Integrity and Infection Prevention, University of Huddersfield, UK.

Journal of Wound Care
|October 5, 2017
PubMed
Summary

This pilot study found no significant links between interface pressure, body mass index, or patient position and tissue reperfusion in healthy adults or critically ill patients. However, temperature showed a potential relationship with tissue reperfusion.

Keywords:
intensive careinterface pressurepositioningtissue deformationtissue reperfusion

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Area of Science:

  • Physiology
  • Intensive Care Medicine
  • Biomedical Engineering

Background:

  • Tissue reperfusion (TR) is crucial for preventing pressure injuries, especially in critically ill patients.
  • Factors like patient position, body mass index (BMI), and temperature can influence tissue health.
  • Interface pressure (IP) is a key variable in pressure injury development, particularly in intensive care unit (ICU) settings.

Purpose of the Study:

  • To investigate the relationship between patient positioning, BMI, body temperature, IP, and TR in healthy adults and critically ill patients.
  • To explore associations between clinical scores (SOFA, Braden, APACHE II), IP, and TR in ICU patients.

Main Methods:

  • The study involved 23 ICU patients and 9 healthy volunteers, measuring IP and TR at the sacrum and greater trochanter.
  • Statistical analyses included repeated measures ANOVAs, considering factors like BMI, temperature, and clinical scores.
  • Tissue reperfusion was assessed using peak pressure index (PPI), peak time (PT), settled time constant (STC), and normalized hyperaemic area (NHA).

Main Results:

  • No statistically significant associations were found between measured parameters (IP, BMI, position) and TR variables.
  • Age was a significant factor, with older participants showing higher scores.
  • A potential relationship between body temperature and TR was observed (p=0.091).

Conclusions:

  • This pilot study, though underpowered, identified important differences between low- and high-acuity ICU patients, and between ICU patients and healthy volunteers.
  • Further research is needed to confirm the observed associations and explore the role of temperature in TR.