The Effect of Nutritional Status in the Treatment of Periprosthetic Joint Infections in Total Hip Arthroplasty.

BACKGROUND

Periprosthetic joint infections (PJIs) continue to be a complication that plagues arthroplasty. Albumin is a surrogate marker for nutrition as well as chronic inflammation, and hypoalbuminemia increases the risk of complications in arthroplasty. Patients with PJI are at increased risk for malnutrition and complications. This study's objective was to analyze patients who underwent treatment of PJI following total hip arthroplasty and investigate the outcome with regards to albumin levels.

METHODS

Overall, 48 patients who underwent surgery for a total hip PJI at 1 institution were reviewed. Albumin and C-reactive protein were recorded preoperatively and 2 to 3 weeks postoperatively. Treatment failure was determined by further surgical treatment for PJI or repeat infection, as determined by Musculoskeletal Infection Society guidelines.

RESULTS

A debridement, antibiotics, and implant retention procedure was performed in 39 patients, and explant with the placement of an antibiotic spacer was performed in 9. Preoperative mean albumin levels were significantly decreased in patients who failed to clear their infection compared to patients who remained infection-free (2.5 versus 3.3, P < .001). Postoperative albumin levels decreased in this same population (2.6 versus 3.8, P < .001). C-reactive protein was elevated in patients who failed to clear their infection preoperatively (19.9 versus 7.5, P < .001) and postoperatively (7.0 versus 1.7, P < .001). The average time to repeat surgical treatment for their PJI was 9 months CONCLUSIONS: Lower albumin levels are observed in patients with PJI who failed to remain infection-free after surgery. Albumin is a surrogate marker for nutrition, and low albumin is associated with poor immune function. Hypoalbuminemia is found with chronic inflammation as well as malnutrition. Nutritional reserves are diverted to the acute inflammatory response during an infection, which can lead to a deficient state. Further research may develop treatments to alter this modifiable risk factor.

LEVEL OF EVIDENCE

Level 4.