Backslabs and plaster casts: which will best accommodate increasing intracompartmental pressures?

Area of Science:

• Orthopedic surgery
• Traumatology
• Biomedical engineering

Background:

• Plaster-of-Paris backslabs are commonly used post-fracture reduction, believed to manage post-injury swelling.
• The efficacy of different cast types in accommodating internal pressure changes remains inadequately understood.

Purpose of the Study:

• To evaluate the expansion capabilities of various plaster casts under increasing internal pressure.
• To determine the safest cast type for managing post-fracture swelling and maintaining reduction.

Main Methods:

• Experimental study simulating internal pressure increases within different plaster cast configurations.
• Comparative analysis of cast expansion in response to applied pressure.

Main Results:

• Split and spread casts demonstrated significant expansion, effectively accommodating internal pressure.
• Plaster-of-Paris backslabs showed no superior ability to accommodate pressure compared to complete casts.
• Complete plaster casts exhibited limited expansion capacity.

Conclusions:

• Backslabs are not superior to complete casts in managing swelling and should not be used when swelling is anticipated.
• The split and spread cast is the only safe option for fractures where swelling is expected.
• Clinical recommendations should prioritize the use of split and spread casts for fracture management.