Anemia Severity and the Risks of Postoperative Complications and Extended Length of Stay Following Primary Total Elbow Arthroplasty

Abstract

Background:

Anemia is a modifiable risk factor that may influence postoperative complications following orthopedic surgical procedures. The objective was to determine the influence of preoperative anemia severity on postoperative complications and length of stay (LOS) following total elbow arthroplasty (TEA).

Methods:

The American College of Surgeons National Surgical Quality Improvement Program registry was queried from 2006 to 2019 for patients undergoing primary TEA. Using the World Health Organization definitions of anemia, patients undergoing TEA were stratified into 3 cohorts: nonanemia (hematocrit >36% for women, >39% for men), mild anemia (hematocrit 33%-36% for women, 33%-39% for men), and moderate-to-severe anemia (hematocrit <33% for both women and men). Patient demographics, surgical time, LOS, and postoperative complications were compared between the groups. A P value <.004 was considered significant.

Results:

After exclusion, 589 patients, of whom 369 (62.6%) did not have anemia, 129 (21.9%) had mild anemia, and 91 (15.5%) had moderate/severe anemia, were included. Increasing severity of anemia was associated with an increased average hospital LOS (2.30 vs 2.81 vs 4.91 days, P < .001). There was a statistically significant increase in blood transfusions (1.08% vs 7.75% vs 17.58%, P < .001), major complications (9.21% vs 17.83% vs 34.07%, P < .001), any complications (11.11% vs 23.26% vs 36.26%, P < .001), and extended LOS ≥6 days (6.23% vs 6.98% vs 31.87%, P < .001) with increasing severity of anemia. Multivariate analysis identified moderate-to-severe anemia was significantly associated with major complications and extended LOS (P < .001).

Conclusions:

Preoperative anemia is a modifiable risk factor for medical and surgical complications within 30 days of TEA.

Keywords

total elbow arthroplasty NSQIP anemia complications length of stay reoperation elbow replacement

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