Suspected Osteomyelitis
Bone pain, fever, elevated inflammatory markers
All Pathways
Infectious DiseaseManagement
Osteomyelitis Management (IDSA 2015)
Osteomyelitis Management (IDSA 2015): Suspected Osteomyelitis → Imaging → Bone Biopsy/Culture → Type of Osteomyelitis → Vertebral Osteomyelitis.
Pathway Overview
14 steps
Algorithm Steps
14 total
01Start 02Action Imaging
MRI is gold standard
- MRI: Sensitivity/specificity >90%
- CT if MRI contraindicated
- Plain films: May be negative early
- Bone scan: If MRI not available
03Action Bone Biopsy/Culture
Essential for targeted therapy
- CT-guided or surgical biopsy
- Culture + histopathology
- Hold antibiotics 2 weeks before if possible
- Blood cultures (positive in ~50% hematogenous)
04Decision Type of Osteomyelitis
05Action Vertebral Osteomyelitis
Hematogenous spread common
- MRI entire spine
- Blood cultures often positive
- S. aureus most common
- Immobilization/bracing
06Action Empiric Antibiotics
Start after cultures obtained
- MSSA: Nafcillin/Oxacillin 2g IV q4h or Cefazolin 2g IV q8h
- MRSA: Vancomycin 15-20mg/kg q12h or Daptomycin 6-8mg/kg
- GNR: Ceftriaxone or FQ
- Narrow to culture results
07Decision Surgical Debridement Needed?
Necrotic bone, hardware, abscess
08Action Surgical Debridement
Remove necrotic/infected bone
- Curettage or excision
- Hardware removal if infected
- May need staged procedures
09Action Duration of Therapy
6 weeks typically
- Vertebral: 6 weeks IV (may switch to PO)
- Long bone: 4-6 weeks
- DFO with residual bone: Longer/indefinite suppression
- After surgical debridement: 4-6 weeks
10Outcome Resolved
ESR/CRP normalizing, imaging improved
11Warning Treatment Failure/Relapse
Re-biopsy, surgery, suppressive therapy
12Action Medical Management Alone
If no surgical indication
- Path rejoins step 09Shared downstream outcome
13Action Contiguous (Non-vertebral)
Adjacent soft tissue infection
- Often post-surgical/trauma
- Debridement usually required
- Polymicrobial common
- DFO: Probe-to-bone test
- Path rejoins step 06Shared downstream outcome
14Action Hematogenous (Long Bone)
Children > adults
- Search for primary source
- S. aureus predominant
- May respond to antibiotics alone
- Path rejoins step 06Shared downstream outcome
Guideline Source
IDSA Vertebral Osteomyelitis Guidelines 2015
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- ⚠️ UNVALIDATED DRAFT: This algorithm was AI-generated from guideline summaries and has NOT been reviewed by clinical experts. All doses, thresholds, and pathways MUST be verified against primary sources by qualified clinicians before clinical use. Do not use for patient care without expert validation.
- Bone biopsy preferred for definitive diagnosis
- Duration depends on surgical debridement
- Vertebral vs long bone differs
Applicable Regions
USEU
Version 1Next review: 2027-01-11
Next steps
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Related Resources
Frequently Asked Questions
What is the Osteomyelitis Management (IDSA 2015)?
The Osteomyelitis Management (IDSA 2015) is a management clinical algorithm for Infectious Disease. It provides a structured decision tree to guide clinical decision-making, based on IDSA Vertebral Osteomyelitis Guidelines 2015.
What guideline is the Osteomyelitis Management (IDSA 2015) based on?
This algorithm is based on IDSA Vertebral Osteomyelitis Guidelines 2015 (DOI: 10.1093/cid/civ482).
What are the limitations of the Osteomyelitis Management (IDSA 2015)?
Known limitations include: ⚠️ UNVALIDATED DRAFT: This algorithm was AI-generated from guideline summaries and has NOT been reviewed by clinical experts. All doses, thresholds, and pathways MUST be verified against primary sources by qualified clinicians before clinical use. Do not use for patient care without expert validation.; Bone biopsy preferred for definitive diagnosis; Duration depends on surgical debridement; Vertebral vs long bone differs. Individual patient factors may require deviation from these recommendations.
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