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Quantifying Spatial Shadow Zones and Their Association With Hospital Falls in Acute Care Unit: Real-Time Location

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Increased spatial shadow zones in hospitals are linked to more patient falls. Minimizing these blind spots through better design and technology can improve patient safety and reduce falls.

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Area of Science:

  • Healthcare Safety
  • Clinical Informatics
  • Patient Monitoring

Background:

  • Hospital falls pose a significant risk to patient well-being and healthcare staff safety globally.
  • Effective spatial monitoring and caregiver visibility are crucial for mitigating fall incidents.
  • Addressing fall risks extends to all individuals within the healthcare environment.

Purpose of the Study:

  • To investigate the relationship between spatial shadow zones and hospital fall incidence.
  • To examine the association between spatial shadow zones and intensive care unit (ICU) transfers.
  • To determine if unmonitored areas impact patient safety outcomes.

Main Methods:

  • A retrospective observational study in an acute care unit over 210 days.
  • Utilized an ultrawideband real-time location system to track mobile workstations.
  • Defined spatial shadow zones as areas unvisited for 60 minutes; analyzed falls and ICU transfers using multivariable logistic regression.

Main Results:

  • A higher percentage of spatial shadow zone was significantly associated with increased odds of hospital falls (OR 1.02, P<.001).
  • Conversely, increased spatial shadow zones were associated with decreased odds of ICU transfer (OR 0.99, P<.001).
  • Sensitivity analyses confirmed the association between spatial shadow zones and falls.

Conclusions:

  • Novel evidence shows a significant positive association between spatial shadow zones and hospital falls.
  • Caregiver visibility, enhanced by minimizing spatial shadow zones, is critical for fall prevention.
  • Optimizing hospital design, workflows, and technology can reduce hospital falls and improve patient safety.