Chart — Med-Surg
VTE Prophylaxis Comparison Chart
Preventing venous thromboembolism is one of nursing’s highest-impact routine jobs. The methods split into mechanical and pharmacologic — and the contraindications are what decide which a given patient gets.
Educational use only. Prophylaxis selection balances VTE risk against bleeding risk and is a provider/protocol decision; never apply mechanical compression to a limb with a suspected acute DVT. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Methods Compared
| Method | Type | How It Works | Candidates | Contraindications / Cautions |
|---|---|---|---|---|
| Early ambulation | Mechanical (behavioral) | Muscle activity pumps venous blood, defeating stasis — the single best preventive | Essentially every patient who can move | None — the goal is to overcome the barriers (pain, lines, reluctance) |
| Sequential compression devices (SCDs) | Mechanical | Sleeves inflate/deflate to mimic the calf pump and push blood upward | Immobile/post-op patients, or anyone who can't have pharmacologic prophylaxis | Suspected/confirmed acute DVT in the limb, significant PAD, leg wounds/ulcers — must be ON and functioning to work |
| Graduated compression stockings | Mechanical | Graded pressure (tightest at the ankle) supports venous return | Selected patients, often with SCDs | Arterial insufficiency; wrong size worsens circulation; less effective alone |
| LMWH (enoxaparin) | Pharmacologic | Inhibits clotting factors (anti-Xa); predictable, no routine monitoring | Moderate-to-high-risk patients without bleeding risk | Active bleeding, severe thrombocytopenia, HIT history, renal impairment (dose-adjust) |
| Unfractionated heparin (low-dose SubQ) | Pharmacologic | Potentiates antithrombin; short-acting, reversible with protamine | Patients needing a reversible agent or with renal impairment | Active bleeding, thrombocytopenia; monitor platelets for HIT |
| DOACs (e.g., rivaroxaban, apixaban) | Pharmacologic | Direct factor Xa/thrombin inhibition; oral, no routine monitoring | Selected surgical/medical patients per protocol | Active bleeding, severe renal/hepatic impairment; specific reversal agents exist |
Exam Traps
- ✦Early ambulation is the best prophylaxis — the answer is rarely 'keep them in bed.'
- ✦SCDs only work when on and cycling — a device on the chair prevents nothing.
- ✦Don't apply mechanical compression to a leg with a suspected acute DVT — it can dislodge the clot.
- ✦Pharmacologic prophylaxis is held for active bleeding, severe thrombocytopenia, or imminent surgery.
- ✦Monitor platelets on heparin (HIT); LMWH and DOACs usually need no routine coagulation monitoring.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with Academy of Medical-Surgical Nurses (AMSN) · Current medical-surgical nursing standards. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →