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Variability of Surgical Site Infection With VEPTR at Eight Centers: A Retrospective Cohort Analysis.
Spine Deformity 2016 January
STUDY DESIGN: Retrospective review.
OBJECTIVES: To describe clinical characteristics and infection rates in modern vertical expandable prosthetic titanium rib (VEPTR) surgery.
SUMMARY OF BACKGROUND DATA: Prior studies have demonstrated infection rates from 10% to 30% with VEPTR surgery.
METHODS: A retrospective query was done on an institutional review board-approved, multicenter prospectively collected database for patients implanted with VEPTR from 2007 to 2013 at eight sites. This identified 213 patients with appropriate data for analysis. Average follow-up was 4.1 years (range 1.7-6.3). Data collected included a Classification of Early-Onset Scoliosis (C-EOS) diagnosis, American Society of Anesthesiologists Physical Status (ASA-PS), major Cobb angle, construct type, clinical symptoms, and microbiology. The distribution of infection rates across all the study sites was compared. The exact p value was estimated by Monte Carlo simulation.
RESULTS: Overall, 18% (38/213) of patients implanted with VEPTR developed infection requiring operative debridement. There were significantly different infection rates among the sites, ranging from 2.9% to 42.9% (p = .029). The average time to infection was 70 days (range 8-236) after the infecting procedure. The majority of infections were due to gram-positive bacteria (80%, 44/55), the most prevalent being methicillin-sensitive Staphylococcus aureus (45%, 25/55). There were 20 patients (53%, 20/38) with either partial or complete implant removal to resolve infection; however, only 3 of 38 (8%) of these resulted in abandonment of VEPTR treatment. There was no difference in infection rate across the primary C-EOS diagnosis categories (p = .21) or based on ASA score (p = .53). After controlling for study site, the odds ratio of an infection following an implant procedure versus an expansion was 2.8 (p = .002). There was no difference in the odds ratio of an infection between the other procedure types (implant, expansion, exchange/revision).
CONCLUSIONS: There were significant differences in infection rates between sites. The variability in infection rate indicates a need for guided efforts to standardize best practices for infection control in VEPTR surgery.
LEVEL OF EVIDENCE: III, therapeutic study.
OBJECTIVES: To describe clinical characteristics and infection rates in modern vertical expandable prosthetic titanium rib (VEPTR) surgery.
SUMMARY OF BACKGROUND DATA: Prior studies have demonstrated infection rates from 10% to 30% with VEPTR surgery.
METHODS: A retrospective query was done on an institutional review board-approved, multicenter prospectively collected database for patients implanted with VEPTR from 2007 to 2013 at eight sites. This identified 213 patients with appropriate data for analysis. Average follow-up was 4.1 years (range 1.7-6.3). Data collected included a Classification of Early-Onset Scoliosis (C-EOS) diagnosis, American Society of Anesthesiologists Physical Status (ASA-PS), major Cobb angle, construct type, clinical symptoms, and microbiology. The distribution of infection rates across all the study sites was compared. The exact p value was estimated by Monte Carlo simulation.
RESULTS: Overall, 18% (38/213) of patients implanted with VEPTR developed infection requiring operative debridement. There were significantly different infection rates among the sites, ranging from 2.9% to 42.9% (p = .029). The average time to infection was 70 days (range 8-236) after the infecting procedure. The majority of infections were due to gram-positive bacteria (80%, 44/55), the most prevalent being methicillin-sensitive Staphylococcus aureus (45%, 25/55). There were 20 patients (53%, 20/38) with either partial or complete implant removal to resolve infection; however, only 3 of 38 (8%) of these resulted in abandonment of VEPTR treatment. There was no difference in infection rate across the primary C-EOS diagnosis categories (p = .21) or based on ASA score (p = .53). After controlling for study site, the odds ratio of an infection following an implant procedure versus an expansion was 2.8 (p = .002). There was no difference in the odds ratio of an infection between the other procedure types (implant, expansion, exchange/revision).
CONCLUSIONS: There were significant differences in infection rates between sites. The variability in infection rate indicates a need for guided efforts to standardize best practices for infection control in VEPTR surgery.
LEVEL OF EVIDENCE: III, therapeutic study.
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