Release of sodium pyruvate from sacral prophylactic dressings: A computational model

Area of Science:

• Biomedical Engineering
• Dermatology
• Materials Science

Background:

• Pressure ulcer prevention is evolving beyond passive dressings.
• Active dressings offer potential for drug delivery and enhanced tissue protection.
• Sacral dressings are crucial for preventing pressure ulcers in vulnerable patients.

Purpose of the Study:

• To investigate the delivery of sodium pyruvate (NaPy) from an active sacral dressing.
• To model NaPy diffusion into skin and deeper tissues for pressure ulcer prevention.
• To determine the time profiles and concentrations of NaPy delivery.

Main Methods:

• Utilized four finite element model variants to simulate skin roughness.
• Modeled the diffusion of NaPy from a dressing reservoir into skin layers.
• Analyzed time profiles and steady-state concentrations of NaPy.

Main Results:

• NaPy concentrations stabilized between 1% and 3% of reservoir concentration.
• Steady-state concentrations were achieved within 1 to 6.5 hours.
• Delivery was effective across different simulated skin roughness levels.

Conclusions:

• Prophylactic sacral dressings can deliver potent NaPy concentrations to skin and subdermal tissues.
• NaPy delivery may increase soft tissue tolerance to pressure-induced deformations.
• The timeframes for achieving therapeutic NaPy levels are clinically practical for various healthcare settings.