Table 3.
Procedural characteristics of spinal and other elective orthopedic surgeries.
| Total Knee Arthroplasty | Total Hip Arthroplasty | Instrumented Spinal Surgery | |
|---|---|---|---|
| OR time (mean minutes [SD]) | 96.9 (37.9)a | 97.6 (42.9)b | 196.6 (SD not provided)c |
| Incision length (mean [in]) |
~ 8–10 | ~ 8–12 | ~ 10–12 inches (larger incision if more vertebrae fused)d |
| Most common approaches | medial parapatella | anterior (lateral); posterior | PLIF, TLIF |
| Procedural overview | dermis → dissects between the muscles, tendons, and nerves to reach the joint | dermis → dissects between the muscles, tendons, and nerves to reach the joint | dermis → dissects between the muscles, tendons, and nerves to reach the vertebrae |
| Implant material | metal alloys (titanium or cobalt-chromium); plastics (ultra-high molecular weight polyethylene); ceramic; bone cement | plastic (polyethylene liner); metals (cobalt/chromium); ceramic; bone cement | plastics (PEEK), metals (titanium, stainless steel, cobalt); bone graft (autograft/allograft/BMP); bone cement |
Abbreviations: ACS NSQIP = The American College of Surgeons National Surgical Quality Improvement Program; BMP = bone morphogenetic protein; in = inches; OR = operating room; PEEK = polyetheretherketone; PLIF = posterior lumbar interbody fusion; SD = standard deviation; TLIF = transforaminal lumbar interbody fusion.
aACS NSQIP: 2005–2011128
bACS NSQIP: 2006–2011100
cACS NSQIP: 2005–201193
dIncision length calculated based on data available on the AAOS website regarding spinal surgery (http://orthoinfo.aaos.org/topic.cfm?topic=A00543) and adjusted for the mean vertebrae fused in STRIVE to date (5.1 vertebrae).