Acute Low Back Pain Evaluation & Management (ACP 2017)

Algorithm Steps

1. ▶

   Start

   Low Back Pain Presentation

   Pain in the lumbosacral region

   1. ⚠

      Warning

      Assess for Red Flags

      Serious underlying conditions

      • Cauda equina: urinary retention, saddle anesthesia, bilateral leg weakness
      • Cancer: unexplained weight loss, history of cancer, age >50 with new pain
      • Infection: fever, IV drug use, recent infection, immunosuppression
      • Fracture: significant trauma, osteoporosis, prolonged steroid use
      • AAA: age >60, vascular disease, pulsatile mass
      1. ●

         Action

         Red Flags Present

         Urgent evaluation required

         • Cauda equina → STAT MRI + surgical consult
         • Cancer concern → MRI + oncology
         • Infection → Labs + imaging + ID consult
         • Fracture → X-ray/CT, orthopedics
         • AAA → CT angiography, vascular surgery
      2. ◆

         Decision

         Radicular Symptoms?

         Leg pain > back pain, dermatomal pattern

         • Positive straight leg raise (sensitivity 91% for disc herniation)
         • Weakness or reflex changes
         • Numbness in dermatomal distribution
         1. ●

            Action

            Radiculopathy Management

            Most improve without surgery

            • Conservative care 4-6 weeks initially
            • NSAIDs first-line
            • Consider short course oral steroids
            • Physical therapy if not improving
            • MRI if severe/progressive or >6 weeks
            1. ●

               Action

               First-Line Treatment

               Non-pharmacologic preferred

               • Superficial heat (moderate evidence)
               • Massage (moderate evidence)
               • Acupuncture (moderate evidence)
               • Spinal manipulation (low-moderate evidence)
               • If pharmacotherapy needed: NSAIDs first-line
               1. ●

                  Action

                  Pharmacotherapy (If Needed)

                  Use lowest effective dose, shortest duration

                  • NSAIDs: ibuprofen 400-800mg TID, naproxen 250-500mg BID
                  • Muscle relaxants: second-line (sedation risk)
                  • Acetaminophen: limited evidence, safer in elderly
                  • AVOID opioids for acute LBP (ACP)
                  1. ◆

                     Decision

                     Reassess at 4-6 Weeks

                     Most should improve

                     1. ✓

                        Outcome

                        Improved

                        Continue activity, return PRN

                     2. ●

                        Action

                        Not Improved

                        Consider imaging and referral

                        • X-ray if not done
                        • MRI if radicular symptoms or red flags
                        • Physical therapy referral
                        • Consider chronic pain evaluation
                        1. ●

                           Action

                           Chronic LBP (>12 weeks)

                           Multimodal approach

                           • Exercise therapy
                           • Cognitive behavioral therapy
                           • Multidisciplinary rehabilitation
                           • Duloxetine (moderate evidence)
                           • Consider pain management referral
         2. ●

            Action

            Nonspecific Low Back Pain

            Most common presentation (>85%)

            • Reassure: excellent prognosis, most resolve 4-6 weeks
            • Stay active - avoid bed rest
            • Apply superficial heat
            • No imaging needed initially