An ergonomic comparison between mechanical and manual patient transfer techniques

Area of Science:

• Occupational Health
• Biomechanics
• Ergonomics

Background:

• Manual patient transfer and repositioning are primary causes of healthcare worker low back injuries.
• Existing research highlights the significant risks associated with traditional patient handling methods.

Purpose of the Study:

• To compare low back stresses from two mechanical patient transfer assist devices against manual techniques.
• To evaluate the ergonomic benefits and user preference of mechanical versus manual patient transfer.

Main Methods:

• Utilized the Michigan 3D Static Strength Model (Version 4.0) to calculate back compressive forces.
• Employed electromyography (EMG) to assess low back muscle activity during transfers.
• Compared forces and muscle activity across manual transfer, Barton Patient Transfer System, and Sling-Suspension Lift (Hoyer Lift).

Main Results:

• Mechanical assist devices significantly reduced low back stress compared to manual techniques.
• The Barton System demonstrated lower back stress and higher user preference than the Sling-Suspension Lift.
• Both mechanical systems were found to be more desirable for patient transfer than traditional manual methods.

Conclusions:

• Mechanical patient transfer devices offer a safer and more ergonomic alternative to manual handling.
• The Barton Patient Transfer System appears to be a superior choice for reducing low back injury risk and improving user preference.
• Implementing mechanical assist devices is recommended to mitigate occupational low back injuries in healthcare settings.