Acute Low Back Pain on Warfarin With Severe Osteoporosis
A 72-year-old woman presents 3 weeks after lifting a bag of groceries with acute low back pain rated 7/10. Pain is worse with standing and extension and eases with sitting. She has atrial fibrillation and takes warfarin 5 mg daily; her INR was 2.8 nine days ago. A DEXA scan 2 years ago gave a T-score of −2.9 at L1–L4, and she takes alendronate weekly. Examination shows bilateral paraspinal hypertonicity at L3–L5, pain on prone extension, negative straight-leg raise, normal strength and reflexes, and no neuropathic signs. BMI is 31, and hip internal rotation is limited to 10° bilaterally. She wants “the same adjustment my husband gets.”
1. Which technique choices are appropriate here, and what is the reasoning behind each exclusion?
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Two independent constraints, and they compound.
1. Anticoagulation (INR 2.8). High-velocity, low-amplitude (HVLA) rotational manipulation, long-lever body-drop techniques, and any positioning that loads a rib cage against a table edge carry a small but real risk of soft-tissue or intramuscular hematoma, and in a frail patient, of falling afterward. This is a relative, not absolute, contraindication - but it is a contraindication you honor.
2. Severe osteoporosis (T −2.9). This is the stronger constraint. Osteoporotic vertebrae and ribs can fracture under forces well below what a standard lumbar manipulation delivers, particularly rotation and extension combined with a body drop. Instrument-assisted adjusting reduces but does not eliminate delivered force.
Chosen approach:
- Position: side-lying or supine with hips and knees flexed - offloading, and no rib compression.
- Grade I–II mobilization, within a pain-free range, in a flexion-bias; avoid end-range extension.
- Soft tissue/myo fascial work to lumbar and gluteal tissue; gentle hip mobilization for the restricted internal rotation.
- Instrument-assisted technique at low energy, if used at all, with the patient monitored during and after.
- Flexion-distraction only with caution - it is lower-velocity but still delivers an axial load; keep it gentle and reassess.
- Home: relative rest from aggravation, walking as tolerated (important for her bone health), heat, and avoiding loaded trunk flexion/rotation.
Excluded: HVLA lumbar rotation, body-drop, any technique requiring prone positioning under load, and any high-force manual pressure over the ribs.
2. What must be verified or reassessed before and during care, and what would prompt co-management?
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Before care:
- Are we sure of the diagnosis? Acute low back pain, worse in extension, in a 72-year-old with T −2.9 is an osteoporotic compression fracture until imaged. If she has not had recent radiographs, order them. Extension-provoked pain is a classic fracture presentation.
- Confirm the INR date and value, and ask when the next check is scheduled. An INR drawn 9 days ago in a patient on warfarin is stale - ask her to have it rechecked and record the value you have.
- Bleeding history: easy bruising, prior GI bleed, falls at home, other anticoagulants/NSAIDs she may not consider “medications.”
- Screen for other causes of acute back pain at this age: aortic aneurysm (ask about abdominal/back pain and check pulses), malignancy red flags, infection.
**During care, monitor **and stop and reassess for: new or spreading ecchymosis, unexplained bruising, dark stool or urine, new headache, or any focal tenderness over a spinous process (possible fracture).
Co-manage: with her primary care/internist for anticoagulation and bone-health review, and with radiology if imaging is warranted. If a fracture is confirmed, involve her physician for fracture management and modify care to comfort measures and bracing as indicated.
Communicate the plan: explain why her husband's adjustment is not hers - not that she is fragile, but that “the force that suits his spine isn't safe for your bone density, so I'll use a different approach.”
3. What benchmarks will you use to judge whether your plan is working, and when do you change course?
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Baseline today, then re-measure at each visit:
- Pain: numeric rating at rest and on standing.
- ROM: lumbar flexion/extension by inclinometer; hip internal rotation (currently 10°).
- Function: five-times sit-to-stand time; 30-second continuous standing tolerance; walking distance.
- A validated measure (Oswestry or Roland-Morris) at intake and at 4 weeks.
Expected trajectory: modest improvement in pain-free standing tolerance within 2–3 visits, meaningful functional gain by 2–4 weeks. A 72-year-old with acute pain on alendronate is not expected to be pain-free in a week; she is expected to be more functional.
Change course if:
- No functional change by visit 4–6, or pain worsening with the extension position → re-image, revisit fracture.
- New neurological signs, saddle symptoms, or bladder change → emergency pathway.
- Any bleeding sign → stop, contact her physician.
- She is not tolerating even gentle mobilization → shift to passive modalities and home program only.
Document the objective baselines, the technique rationale, the INR value and its date, and the specific criteria you set for changing course - this is what makes the record defensible.