Back pain (acute motor loss)

Definition/Description

Patient who presents with acute (less than 16 weeks in duration) low back pain with or without radicular pain

Red Flag Symptoms

Red flags where further investigation in primary or secondary care should be considered before referral to MSK:

  • Significant motor weakness e.g. Isolated foot drop
  • Progressive neurological deficit in lower extremities
  • Saddle area numbness, urinary incontinence/retention or faecal incontinence that is not present on day of attendance or are greater than 3 months in duration
  • Bilateral true sciatica
  • Sexual dysfunction
  • Paresis (gait disturbance)
  • Thoracic pain
  • Weight loss care
  • Fever 
  • Previous malignancy
  • Age < 20 or >55
  • Systemic illness pain
  • HIV
  • IV drug user
  • Frequent or long term steroid use
  • Structural deformity
Please note: there should be no requirement for non-urgent MRI requests from primary care. Such patients should be referred into the MSK service for full assessment and management of chronic back pain.

 

Cauda Equina syndrome (see pathway guidance)

Symptoms which are present on the day of attendance and are less than 3 months in duration requiring urgent action:

  • Altered sensation in the saddle area
  • Bladder dysfunction – incontinence or retention
  • Faecal incontinence
These patients should be immediately sent to the Emergency Department

Guidelines on Management

Suggested Acute Pain Analgesic Ladder for Adult Patients

PAIN INTENSITY

SCORE 0

No pain
 

PAIN INTENSITY

SCORE 1

Mild pain
 

PAIN INTENSITY

SCORE 2

Moderate pain
 

PAIN INTENSITY

SCORE 3

Severe pain
 

 

Regular
Paracetamol
NSAID
Strong Opioid

PRN
Strong Opioid (consider Oral / SC / IM)

Taper down as symptoms improve

 

Regular
Paracetamol
NSAID
Weak Opioid

PRN
Strong Opioid (consider Oral / S/C / I/M)

 

Regular
Paracetamol +/ - ibuprofen

PRN
Weak Opioid e.g. codeine change NSAID to naproxen

 

PRN

Paracetamol +/ - ibuprofen

 

 

Cautions: Use the BNF for guidance and cautions.

In addition:

  • Be cautious combining weak and strong opiates
  • Anti emetics may need to be prescribed with opioids if there are concerns about opioid induced nausea
  • Aperients should also be considered with opioids if there are concerns about opioid induced constipation
  • Codeine is contraindicated breast feeding mothers
  • Check renal function is not impaired when prescribing NSAIDs
  • Consider gastric protection when prescribing NSAID’s

(Please also see Image A below) 

Referral Criteria/Information

Referral criteria for MRI For MSK physiotherapists:

  • Discuss with senior therapist/ESP re: analgesia ladder and patient history (if referring from within MSK)
  • The MRI scan will be used to aid decision making for further treatment interventions (either in the Pain team or Orthopaedic surgery)
  • Clear neurological deficit (motor loss) in the presence of back pain with radicular symptoms
  • It is essential that the MRI request states whether there has been previous back surgery, including the level operated on and when the surgery was. If the patient has had a previous scan of the same area we need to know when and where.
  • Check MRI is not contraindicated (no pacemakers, no aneurysm clips, no inner ear implants, no implanted spinal cord stimulators, no metal fragments in the eye).

Additional Resources & Reference

Image A
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Image B
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Author:
Date created: 14/08/2025, 10:51
Last modified: 20/08/2025, 15:18
Date of review: