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Infection complicating 794 primary and revision arthroscopies. Accuracy of actual prophylactic procedures against infection and results from a single orthopedic center in Poland


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Patients age, BMI, time of surgery and hospital stay in cases with and without infection

Without infection (n = 790) Infected (n = 4) 95% CI
M SD M SD t p LL UL d Cohena
Age (years) 37.15 15.81 45.25 15.48 −1.02 0.307 −23.65 7.46 0.51
BMI 25.30 4.49 26.15 3.36 −0.38 0.706 −5.26 3.56 0.19
Time of surgery (minutes) 84.85 47.88 118.75 55.13 −1.41 0.158 −81.04 13.24 0.71
Length of stay in the hospital (days) 2.11 0.92 4.50 2.52 −1.90 0.154 −6.39 1.62 2.57

Knee-only arthroscopies - with and without infection

Without infection (n = 641) Infected (n = 3) 95% CI
M SD M SD t p LL UL d Cohena
Age (years) 36.52 15.93 39.33 12.22 −0.31 0.760 −20.90 15.27 0.18
BMI 25.16 4.34 24.83 2.56 0.13 0.898 −4.61 5.25 0.07
Time of surgery (minutes) 80.64 49.02 91.67 12.58 −0.39 0.697 −66.65 44.60 0.23
Length of stay in the hospital (days) 2.15 0.94 3.33 1.15 −2.19 0.029 −2.25 −0.12 1.26

Demographic data, details of surgery, risk factors for SAAA in infected cases

DATA ANALYSED Patient's initials
JK MB EW HG
Area of the body, procedure knee, arthrolysis knee, arthrolysis knee, ACL reconstruction shoulder, rotator cuff reconstruction
Age (years) 42 50 26 63
Sex (M-male; F-female) M M F F
Primary/revision revision revision revision primary
Using of non-resorbable implant no no yes yes
Using of drains yes yes yes no
Time of surgery (hours : minutes) 01:45 01:30 01:20 03:20
BMI 26.6 26 21.9 30
Length of stay in the hospital 4 days 4 days 2 days 8 days
Onset of infection from index operation 7 days 13 days 47 days 5 month 2 weeks
Pathogen Enterobacter cloacae Staphylococcus lugdunensis Propionibacterium acnes unknown

Demographic characteristics of 794 elective arthroscopies analyzed for postoperative infection

DATA ANALYSED OPERATED JOINT
Knee Shoulder Hip Ankle Wrist MTP joint Elbow
Number of analyzed cases 794 644 65 52 22 6 3 2
Age – years (mean. SD. range) 37.19±15.8 (7–79) 36.51±15.9 (7–79) 42.63±16.91 (15–78) 36.81±10.7 (14–65) 43.77±14.9 (23–78) 27.33±14.4 (13–52) 46.67±10.4 (37–61) 16.5±11.5 (15–38)
Sex F274 : M520 F226 : M418 F16 : M49 F16 : M49 F6 : M16 F4 : M2 F1 : M2 F0 : M2
Primary Revision 83.8% (665 vs. 129) 81.5% (525 vs. 119) 100% (65 vs.0) 100% (52 vs.0) 63.63%% (14 vs.8) 100% (6 vs.0) 100% (3 vs.0) 100% (2 vs.0)
The use of nonabsorbable implant (%) 55.8% (443 vs.351) 54.66% (352 vs.292) 72.31% (47 vs.18) 72.31% (47 vs.18) 0% (0 vs.22) 0% (0 vs.6) 0% (0 vs.3) 0% (0 vs.2)
The use of drains (%) 85.26% (677 vs. 117) 99.38% (640 vs.4) 21.54% (14 vs.51) 21.54% (14 vs.51) 95.45%% (21 vs.1) 0% (0 vs.6) 0% (0 vs.3) 0% (0 vs.2)
Time of surgery (mean. SD. range) 1:25±00:48 (00:15–5:35) 1:20±00:49 (00:15–5:35) 1:25±00:47 (00:30–3:20) 1:58±00:30 (01:15–3:20) 1:43±00:39 (00:45–3:20) 1:14±00:13 (00:55–01:30) 00:52±00:09 (00:40–01:00) 1:00±00:20 (00:40–01:20)
BMI (mean. SD. range) 25.3±4.48 (14–45.44) 25.15±4.33 (14–45.44) 26.56±5.4 (17.4–39.8) 25.2±4.34 (17.2–38.06) 27.12±5.14 (19.7–40.6) 23.77±2.37 (21.4–28.3) 22.05±4.51 (18.38–28.4) 24.47±5.37 (19.1–29.83)
Length of stay in the hospital (mean. SD. range) 2.12±0.94 (1–8) 2.15±0.93 (1–7) 2±1.13 (1–8) 1.87±0.7 (1–3) 2.41±0.83 (1–4) 1.5±0.5 (1–2) 2.33±0.47 (2–3) 2±0 (2)

Comparison of 129 revision and 665 non-revision cases with regard to patients age, BMI, time of surgery and hospital stay

Primary (n = 665) Revision (n = 129) 95% CI
M SD M SD t p LL UL d Cohena
Age 38.14 16.31 32.29 11.81 4.80 <0.001 3.45 8.24 0.37
BMI 25.41 4.50 24.75 4.39 1.52 0.130 −0.19 1.50 0.15
Time of surgery (minutes) 82.51 45.11 97.95 59.00 −2.82 0.005 −26.26 −4.61 0.32
Length of stay in the hospital (days) 2.08 0.92 2.35 1.04 −2.72 0.007 −0.46 −0.07 0.29
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Life Sciences, Molecular Biology, Microbiology and Virology, Medicine, Basic Medical Science, Immunology