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Updated: Aug 28, 2025

Objective Nociceptive Assessment in Ventilated ICU Patients: A Feasibility Study Using Pupillometry and the Nociceptive Flexion Reflex
Published on: July 4, 2018
Neuromuscular blocking agents and opioids are major risk factors for developing pressure injuries in patients in the
Su Yeon Lee1, Dong Kyu Oh1, Sang-Bum Hong1
1Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Insights
Prolonged use of neuromuscular blocking agents and opioids increases pressure injury risk in ICU patients. Minimizing these medications and promoting early patient mobilization are key prevention strategies.
Area of Science:
- Critical Care Medicine
- Patient Safety
- Nursing Research
Background:
- Intensive care unit (ICU) patients face a high risk of developing pressure injuries.
- Pressure injuries can lead to severe complications and increased mortality.
- Effective prevention strategies are crucial for this vulnerable population.
Purpose of the Study:
- To investigate the specific risk factors associated with pressure injury development in ICU patients.
- To identify modifiable and non-modifiable factors contributing to pressure injury onset.
Main Methods:
- Retrospective analysis of 666 adult patients admitted to a medical ICU from January to December 2019.
- Data collection included patient demographics, medications, mechanical ventilation, hemodialysis, laboratory results, and pressure injury development.
- Statistical analysis identified risk factors using odds ratios and p-values.
Main Results:
- Pressure injuries developed in 15% (102 out of 666) of patients without pre-existing injuries.
- Increased administration days of neuromuscular blocking agents (NMBAs) and opioids significantly elevated pressure injury risk.
- Patients experiencing friction and shear had a substantially higher risk (OR, 2.203; p = 0.011).
Conclusions:
- Prolonged use of NMBAs and opioids is linked to increased pressure injury development due to associated immobilization.
- Minimizing the use of these medications and encouraging early patient mobilization are recommended.
- The Braden scale subscale 'friction and shear' is a significant predictor of pressure injuries in the ICU setting.
Background/Aims:
Patients in the intensive care unit (ICU) are at high risk for developing pressure injuries, which can cause severe complications and even increase the mortality risk. Therefore, prevention of pressure injuries is most important. In this study, we investigated the risk factors of pressure injury development in patients admitted to the ICU.
Methods:
We retrospectively analyzed patients ages > 18 years admitted to the medical ICU in a tertiary hospital between January and December 2019. We collected patient baseline characteristics, medications received, mechanical ventilation or hemodialysis use, laboratory findings, and date of pressure injury onset and characteristics.
Results:
We analyzed 666 patients who did not have pressure injuries at ICU admission. Pressure injuries developed in 102 patients (15%). The risk of pressure injury development increased as the administration days for neuromuscular blocking agents (NMBAs; odds ratio [OR], 1.138; p = 0.019) and opioids (OR, 1.084; p = 0.028) increased, and if the patient had problem with friction and shear (OR, 2.203; p = 0.011).
Conclusion:
The prolonged use of NMBAs and opioids can increase the risk of pressure injury development. Because these medications are associated with immobilization, using both should be minimized and patient early mobilization should be promoted. Among the Braden subscales, "friction and shear" was associated with the development of pressure injuries in ICU patients.
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