Comparison of Saline Expanders and Air Expanders for Breast Reconstruction

Postmastectomy breast reconstruction with saline tissue expanders requires frequent saline injections. Air expanders contain an air canister and patient-operated remote to control expansion. The aim of this study was to evaluate the effectiveness of air expanders, inclusive of cost.

An international review board-approved retrospective review was performed of women who underwent breast tissue expansion between January 1, 2005 and February 5, 2019. Data collected included demographics, distance from clinic, mastectomy type, breast cancer treatment, expander type, expansion duration, postoperative visits, expansion visits, and postoperative complications. We compared true, unrealized, and overall costs and efficiency measured by time for expansion completion. True cost was calculated by adding expander, saline, and needle prices. Unrealized cost was calculated by multiplying number of visits for expansion by the expense of roundtrip driving. T tests and z scores determined clinical significance.

Postoperative complication rates were not significantly different between groups. The air expansion mean true cost was US $1006.11 more than saline expansion (P < 0.001), whereas the mean unrealized cost was US $551.81 less (P = 0.008). The air expansion mean overall cost was US $461.43 more than saline expansion (P = 0.063). There was no significant difference in time to expander-to-implant exchange.

This study demonstrates that saline and air expanders have no difference in complications or ability to complete expansion. However, there is significantly higher unrealized cost of saline expansion due to needle and saline costs and travel for more frequent doctor visits. However, saline expansion overall cost is less than air expansion, but statistically insignificant. Air expanders are effective in properly selected patients.