Journal List > J Korean Soc Spine Surg > v.20(3) > 1076016

Park, Chung, Jeon, Seo, and Lim: Efficacy of Prophylactic Antibiotics in Spinal Surgery

Abstract

Study Design

Retrospective comparative study.

Objectives

The aim of this study was to compare the efficacy of prophylactic antibiotics in spinal surgery for the occurrence of postoperative surgical site infection (SSI) and host immune reactions depending on various administration regimens and protocols.

Summary of Literature Review

The superiority of one regimen or protocol of prophylactic antibiotics over others for SSI in spinal surgery has not been clearly demonstrated. We designed a controlled clinical trial to compare the occurrence of SSI with the changes of hematologic results depending on prophylaxis regimens and protocols.

Materials and Methods

Between January 2007 and February 2011, two hundred consecutive patients who had undergone thoracolumbar/lumbar surgery for degenerative or traumatic disease were included. Postoperative protocol was altered for each group of fifty consecutive patients; 1st generation cephalosporins for 5-days (group A), 2nd generation cephalosporins for 5-days (group B), 1st generation cephalosporins for 3-days (group C), and 2nd generation cephalosporins for 3-days (group D). Preoperative antibiotic prophylaxis was administrated within 1 hour prior to surgical incision with the same trial antibiotics. Intraoperative bacterial culture was performed from the surgical site. The occurrences of SSI were evaluated as either incisional or organ/space SSI. Serial changes in hematologic inflammatory markers (WBC, ESR, CRP) and DIC markers (fibrinogen, FDP, D-dimer) were compared until postoperative 2 weeks.

Results

The study groups were homogeneous regarding age, sex, body mass index, estimated blood loss, diabetes mellitus, smoking, diagnosis, baseline laboratory values, and type of surgery including instrumentation. Overall, 13 cases of incisional SSI (6.5%) and 3 cases (1.5%) of organ/space SSI occurred. There was no difference in the occurrence of incisional and organ/space SSI among the 4 groups (P=0.690, 0.799). Laboratory results revealed that postoperative changes in hematologic inflammatory markers and DIC markers were not influenced by prophylaxis regimens and protocols (all P>0.05).

Conclusions

The occurrences of SSI and host immune responses were not influenced by postoperative antibiotics regimens and protocols. Hematologic investigation revealed that host immune responses did not depend on the type of prophylactic antibiotics.

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Figures and Tables%

Fig. 1.
Changes of Hematologic inflammatory marker
jkss-20-77f1.tif
Fig. 2.
Changes of Disseminated Intravascular Coagulation (DIC) marker
jkss-20-77f2.tif
Table 1.
Patient Demographics
Group A Group B Group C Group D P
Age 51.6±15.0 54.0±16.1 54.0±16.1 54.0±16.1 0.308
Male gender 26 (52) 21 (42) 24 (48) 23 (46) 0.574
Body mass index (m/kg2) 23.5 23.7 23.4 23.5 0.945
Current smoking 13 (26) 15 (30) 14 (28) 16 (32) 0.923
Diabetes mellitus 5 (10) 3 (6) 4 (8) 5 (10) 0.872
Serum albumin (g/dL) 3.9±0.5 4.1±0.5 3.7±0.5 4.0±0.5 0.002
Total lymphocyte count (N/μL) 2012.0±857.5 2120.5±984.3 2171.7±1013.3 2157.8±960.5 0.840
Diagnosis 0.891
Degenerative disease 28 (56) 31 (62) 29 (58) 26 (52)
Fracture 19 (38) 15 (30) 18 (36) 21 (42)
Tumor 1 (2) 1 (2) 0 0
Previous instumentation 2 (4) 3 (6) 3 (6) 3 (6)
Treatment 0.736
Decompression 13 (26) 16 (32) 15 (30) 14 (28)
Instrumented fusion
1-level 18 (36) 17 (34) 15 (30) 14 (28)
2-levels 6 (12) 5 (10) 7 (14) 7 (14)
> 3-levels 11 (22) 9 (18) 10 (20) 12 (24)
Implant removal 2 (4) 3 (6) 3 (6) 3 (6)
Operation time (minute) 222.8±48.4 207.8±42.4 224.1±50.6 212.0±41.7 0.211
Estimated blood loss (cc) 411.4±175.5 335.7±156.1 398.4±160.9 412.1±162.7 0.670

*Unless otherwise noted, data are number of participants and percentages in parentheses

Table 2.
Result of bacterial culture on the surgical site swab
Group A Group B Group C Group D
Microbial cultivation at OR room
Before skin drape
S. epidermidis 7 4 6 6
MRCNS - 7 4 1
MRSA - 1 - -
E. coli - - - 1
E. fecalis 1 - - -
Before wound closure
S. epidermidis - 1 1 2
MRCNS 2 2 - 1
E. coli - - 1 -
Table 3.
Laboratory Result
Group A Group B Group C Group D P
WBC (N/μL)
Baseline 7259±2467 6643±2073 6762±2002 7132±2682 0.445
Postop-immediate 10140±2710 10149±3975 10738±3334 10862±4494 0.607
Postop-1 week 7150±2489 7564±1850 8097±2638 7521±2309 0.241
Postop- 2 weeks 6699±1581 7693±2408 6873±1743 7237±2103 0.179
ESR (mm/hr)
Baseline 15.5±16.0 15.7±15.5 17.9±20.7 16.1±17.2 0.431
Postop-immediate 16.4±15.5 19.5±14.2 18.7±21.9 19.9±13.3 0.100
Postop-1 week 38.3±15.1 53.1±64.5 44.3±21.8 43.8±22.7 0.269
Postop-2 weeks 37.6±16.0 41.8±16.2 44.6±24.5 37.5±16.9 0.416
CRP (mg/dL)
Baseline 0.86±0.98 0.76±1.01 0.86±0.98 0.91±1.84 0.971
Postop-immediate 1.71±1.78 1.40±1.68 1.03±1.95 1.20±2.87 0.386
Postop-1 week 2.75±1.90 4.43±4.33 3.41±2.71 4.11±3.43 0.054
Postop-2 weeks 1.19±0.96 1.39±0.91 2.29±2.25 1.78±2.31 0.110
Fibrinogen (mg/dL)
Baseline 412.7±123.4 437.5±126.2 405.3±126.3 382.0±75.1 0.063
Postop-immediate 378.0±97.2 410.8±114.2 378.6±111.4 367.7±88.2 0.140
Postop-1 week 590.6±128.0 601.4±118.9 569.6±136.3 547.6±101.4 0.074
Postop-2 weeks 534.7±131.8 631.5±115.7 501.1±144.5 524.6±116.2 0.056
FDP (μg/mL)
Baseline 6.80±4.60 6.20±3.71 7.73±5.44 7.47±5.40 0.345
Postop-immediate 11.2±6.74 12.2±7.15 12.8±7.20 11.4±7.03 0.555
Postop-1 week 11.9±6.21 12.3±6.47 10.1±6.31 10.34±6.47 0.153
Postop-2 weeks 8.33±4.85 5.03±1.94 9.50±5.99 9.70±6.95 0.102
D-dimer (μg/mL)
Baseline 0.71±0.86 0.56±0.70 0.67±0.75 0.82±1.19 0.695
Postop-immediate 1.30±1.12 1.77±1.87 1.63±1.72 1.84±2.16 0.495
Postop-1 week 1.18±0.92 1.44±1.70 1.31±1.25 1.96±1.06 0.167
Postop-2 weeks 0.75±0.31 0.63±0.22 0.99±0.75 1.06±0.51 0.181
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