Hospitalized Medical Patient
Admitted for acute medical illness
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Internal MedicineManagement
VTE Prophylaxis in Hospitalized Medical Patients
VTE Prophylaxis in Hospitalized Medical Patients: Hospitalized Medical Patient → Assess VTE Risk → Low VTE Risk (Padua <4).
Pathway Overview
12 steps
Algorithm Steps
12 total
01Start 02Decision Assess VTE Risk
Use Padua Score or clinical judgment
- Padua Score ≥4 = high risk
- Risk factors: immobility, cancer, prior VTE
- Age >70, obesity, HF, COPD, sepsis
- Thrombophilia, stroke, acute MI
03Outcome Low VTE Risk (Padua <4)
Pharmacologic prophylaxis not recommended
- Early mobilization encouraged
- No routine pharmacologic or mechanical prophylaxis
- Reassess if clinical status changes
04Action High VTE Risk (Padua ≥4)
Prophylaxis recommended
05Decision Assess Bleeding Risk
IMPROVE score or clinical factors
- Active bleeding or recent major bleed
- Severe thrombocytopenia (<50K)
- Recent stroke, surgery
- Concurrent anticoagulation
- Severe hepatic disease
06Action Low Bleeding Risk
Pharmacologic prophylaxis preferred
- Enoxaparin 40mg SC daily, OR
- Heparin 5000 units SC q8-12h, OR
- Fondaparinux 2.5mg SC daily
- Continue for duration of immobility
07Action Renal Dose Adjustment
CrCl <30 mL/min
- Enoxaparin: reduce to 30mg daily
- Heparin: preferred in severe CKD
- Fondaparinux: avoid if CrCl <30
08Decision Duration of Prophylaxis
During hospitalization minimum
- Standard: duration of acute illness/immobility
- No routine extended prophylaxis post-discharge
- Extended may be considered: high VTE risk, low bleed risk
09Outcome At Discharge
Assess need for extended prophylaxis
- Discontinue in most patients
- Continue mobilization
- Consider extended for very high risk (cancer, prior VTE)
- Path rejoins step 08Shared downstream outcome
10Warning HIT Monitoring
Heparin-induced thrombocytopenia
- Platelets at baseline
- Recheck if >4 days on heparin/LMWH
- Higher risk with UFH vs LMWH
- 4Ts score if HIT suspected
11Action High Bleeding Risk
Mechanical prophylaxis only
- Sequential compression devices (SCDs)
- Graduated compression stockings (GCS)
- Reassess daily for pharmacologic option
- Add pharmacologic when bleeding risk decreases
- Path rejoins step 08Shared downstream outcome
12Action Special Populations
Consider specific needs
- ICU: prophylaxis for most (LMWH or UFH)
- Stroke: delayed start if hemorrhagic
- Cancer: LMWH preferred
- COVID-19: standard dose (not intensified)
- Obesity: may need dose adjustment
- Path rejoins step 05Shared downstream outcome
Guideline Source
CHEST Guidelines: Prevention of VTE in Nonsurgical Patients
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Does not cover surgical prophylaxis
- Cancer patients may need special consideration
- Drug dosing requires renal adjustment
- Bleeding risk assessment is clinical judgment
- Extended prophylaxis post-discharge controversial
Applicable Regions
USEU
EU: Similar to NICE guidelines
US: Based on CHEST guidelines
Version 1Next review: 2027-01-11
Next steps
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Related Resources
Frequently Asked Questions
What is the VTE Prophylaxis in Hospitalized Medical Patients?
The VTE Prophylaxis in Hospitalized Medical Patients is a management clinical algorithm for Internal Medicine. It provides a structured decision tree to guide clinical decision-making, based on CHEST Guidelines: Prevention of VTE in Nonsurgical Patients.
What guideline is the VTE Prophylaxis in Hospitalized Medical Patients based on?
This algorithm is based on CHEST Guidelines: Prevention of VTE in Nonsurgical Patients (DOI: 10.1378/chest.11-2296).
What are the limitations of the VTE Prophylaxis in Hospitalized Medical Patients?
Known limitations include: Does not cover surgical prophylaxis; Cancer patients may need special consideration; Drug dosing requires renal adjustment; Bleeding risk assessment is clinical judgment; Extended prophylaxis post-discharge controversial. Individual patient factors may require deviation from these recommendations.
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