A Colles' fracture is a transverse fracture of the distal radius with dorsal displacement, dorsal angulation, dorsal comminution, and radial shortening, producing the classic "dinner fork" (silver fork) deformity. [1-2] It is the most common forearm fracture in adults, typically resulting from a fall on an outstretched hand (FOOSH). [2]
1. History
- Mechanism: Fall onto an outstretched hand with forearm pronated and wrist dorsiflexed; high-energy trauma (MVC, sports) in younger patients, low-energy falls in elderly [2-3]
- Symptom characterization: Focal wrist pain exacerbated by movement, inability to grip, immediate swelling
- Timing: Acute onset at time of injury; ask about time elapsed since injury (affects reduction success)
- Associated symptoms: Numbness/tingling in median nerve distribution (thumb through radial half of 4th finger) — present in up to 25% of patients [2]
- Important negatives: Ask about hand dominance, activity level, occupation, and functional demands (guides treatment aggressiveness); prior wrist injuries; anticoagulant use [2]
2. Alarm Features
- Open fracture (bone protruding or wound communicating with fracture)
- Vascular compromise: Absent radial/ulnar pulse, pallor, cool digits
- Compartment syndrome: Tense forearm, pain with passive finger extension, paresthesias out of proportion
- Acute median nerve injury: Loss of thumb opposition, sensory deficit in median distribution
- Gross instability or comminution suggesting need for emergent orthopedic consultation [2]
3. Medications
- First-line analgesia: Ibuprofen 400–600 mg + acetaminophen 1000 mg (combination is as effective as oral opioids for acute extremity pain) [4-5]
- Topical NSAIDs are recommended by ACP/AAFP guidelines as primary treatment for musculoskeletal pain [6]
- Procedural analgesia for reduction: Hematoma block (most commonly used — 75% of ED reductions), procedural sedation, or ultrasound-guided nerve block [7]
- Opioid-sparing approach recommended by AAOS; opioid alternatives (NSAIDs, acetaminophen, ice, elevation) should be considered first [8]
- Cautions: Avoid NSAIDs in renal impairment, GI bleeding history, or anticoagulated patients; limit opioid prescriptions to ≤7 days if used [6][9]
4. Diet
- Ensure adequate calcium intake (1000–1200 mg/day) and vitamin D (600–800 IU/day) for bone healing, especially in osteoporotic patients [10]
- Adequate protein intake supports fracture healing
- Smoking cessation counseling — smoking impairs bone healing and is a risk factor for osteoporosis [11]
- Limit alcohol to <3 drinks/day (excess alcohol increases fracture risk) [11]
5. Review of Systems
- Neurologic: Numbness, tingling, weakness in hand (median nerve injury)
- Vascular: Color changes, temperature changes in digits
- Musculoskeletal: Elbow pain, shoulder pain (rule out associated injuries from fall); ipsilateral scaphoid tenderness
- Constitutional: Syncope, dizziness, chest pain (what caused the fall in elderly?)
- Endocrine: History of early menopause, thyroid disease, glucocorticoid use
6. Collateral History and Family History
- Collateral: Witnessed fall? Mechanism details? Baseline functional status in elderly patients; cognitive status; living situation (independent vs. assisted)
- Family history: Parental history of hip fracture (independent risk factor for osteoporotic fracture, included in FRAX) [10][12]
- Social context: Fall risk at home, ability to perform ADLs with one hand immobilized, support system for recovery
7. Risk Factors
- Bimodal distribution: [2]
- Young males: high-energy trauma (sports, MVC)
- Postmenopausal women >50: low-energy falls + osteoporosis (lifetime risk ~16.6% for women vs. 2.9% for men) [3]
- Osteoporosis risk factors: Older age, female sex, low body weight (<58 kg), current smoking, excess alcohol, glucocorticoid use, rheumatoid arthritis, premature menopause, vitamin D deficiency [11][13]
- Fall risk factors: Frailty, impaired mobility, poor vision, neurologic disease, polypharmacy, environmental hazards [14]
- A Colles' fracture in a postmenopausal woman should be treated as a sentinel event for osteoporosis [12][14]
8. Differential Diagnosis
- Smith fracture (reverse Colles'): Volar displacement of distal fragment; caused by fall on dorsum of wrist or fall over handlebars [2]
- Barton fracture: Distal radius fracture with radiocarpal dislocation/subluxation; requires significant force [2]
- Chauffeur (Hutchinson) fracture: Radial styloid fracture; intra-articular; associated with scaphoid/lunate injuries [2]
- Scaphoid fracture: Most common carpal fracture; anatomic snuffbox tenderness; can be missed on initial X-ray in up to 30% [15]
- Galeazzi fracture-dislocation: Distal/mid-radius fracture with DRUJ dislocation [2]
- Distal radioulnar joint (DRUJ) injury without fracture
- Perilunate/lunate dislocation: High-energy mechanism; often missed on initial films
- Wrist sprain/ligamentous injury: Scapholunate ligament tear, TFCC injury [16]
9. Past Medical History
- Osteoporosis/osteopenia and prior DEXA results
- Previous fragility fractures (strongest predictor of future fracture) [10]
- Chronic glucocorticoid use, rheumatoid arthritis, diabetes, CKD
- Prior wrist injuries or surgeries
- Bleeding disorders or anticoagulant use (affects hematoma block and surgical planning)
- Carpal tunnel syndrome (pre-existing vs. acute)
10. Physical Exam
- Inspection: Classic "dinner fork" deformity — dorsal angulation of wrist with prominence of distal fragment dorsally; swelling, ecchymosis; assess for open wounds [1-2]
- Palpation: Tenderness over distal radius; palpate scaphoid (anatomic snuffbox), ulnar styloid, and lunate for concomitant injuries [2]
- Neurovascular exam (critical):
- Median nerve motor: Thumb-to-5th-finger opposition against resistance [2]
- Median nerve sensory: Palmar surface of thumb through radial half of 4th finger [2]
- Radial and ulnar pulses; capillary refill in all digits
- Forearm compartments: Assess for tense compartments, pain with passive finger extension
- Elbow and shoulder: Assess for associated injuries from fall mechanism
11. Lab Studies
- Routine labs are generally not required for isolated Colles' fractures
- If procedural sedation planned: Consider baseline vitals, pulse oximetry
- In elderly/osteoporotic patients, consider as outpatient workup:
- Calcium, phosphorus, alkaline phosphatase, 25-OH vitamin D
- TSH (hyperthyroidism causes bone loss)
- CBC, BMP (baseline if surgical candidate)
- DEXA scan if not done recently (a distal radius fracture in a postmenopausal woman warrants osteoporosis evaluation) [12][14]
12. Imaging
- First-line: PA, lateral, and oblique radiographs of the wrist [2]
- Key radiographic parameters to assess: [2][8]
- Radial inclination (normal ~23°)
- Radial height/length (normal ~11 mm)
- Volar tilt (normal ~11° volar; dorsal tilt is abnormal)
- Post-reduction films: Essential to confirm adequate reduction
- CT scan: Useful for intra-articular fractures to assess articular step-off and comminution; guides surgical planning
- MRI: Rarely needed acutely; useful if occult scaphoid fracture suspected [16-17]
- When imaging is unnecessary: Post-treatment routine radiographs can be reduced in frequency without affecting outcomes per AAOS guidelines [18]
13. Special Tests
- Hematoma block technique: Inject 5–10 mL of 1% lidocaine (without epinephrine) into the fracture hematoma under sterile technique — most commonly used method for ED reduction [7]
- Frykman classification: Distinguishes extra- vs. intra-articular involvement and presence of ulnar styloid fracture [1]
- AO/OTA classification: Groups A (extra-articular), B (partial articular), C (complete articular) — guides surgical decision-making [1]
- FRAX score: Calculate 10-year fracture risk in patients ≥50 with suspected osteoporosis [10][12]
- Point-of-care ultrasound: Can confirm fracture and guide nerve blocks
14. ECG
- Not routinely indicated for isolated Colles' fracture
- Obtain ECG if:
- Syncope or cardiac symptoms preceded the fall
- Procedural sedation is planned (pre-sedation assessment)
- Elderly patient with unexplained fall (rule out arrhythmia)
15. Assessment
Severity stratification per AAOS/ASSH guidelines: [8][18]
- Stable/non-displaced: Extra-articular, minimal displacement → conservative management
- Unstable/displaced (surgical thresholds in patients <65 years):
- Post-reduction radial shortening >3 mm
- Dorsal tilt >10°
- Intra-articular displacement or step-off >2 mm
- Patients ≥65 years: Strong evidence that surgical fixation does not improve patient-reported outcomes over conservative management, despite better radiographic parameters [18-19]
- Complications to consider: Median neuropathy (most common early complication), CRPS, malunion, post-traumatic arthritis, stiffness (most common 1-year complication at 11.5%), tendon rupture [1][20-21]
16. Treatment Plan
Initial stabilization (ED)
- Ice, elevation, analgesia (ibuprofen + acetaminophen) [8]
- Non-displaced/minimally displaced: Sugar-tong splint → transition to short-arm cast [2]
- Displaced fractures: Closed reduction under hematoma block (or procedural sedation) → post-reduction radiographs → sugar-tong splint [2][7]
Immobilization duration: 3–6 weeks; recent evidence favors 3 weeks for non-displaced fractures [2]
Surgical indications (non-geriatric, <65 years): [8][18]
- Post-reduction radial shortening >3 mm, dorsal tilt >10°, or intra-articular step-off >2 mm
- Open fracture, vascular injury, acute compartment syndrome
- Fixation technique (volar locking plate most common) should be driven by fracture pattern; no difference in outcomes between techniques after 3 months [18]
Post-operative pain management: Opioid-sparing protocols preferred; celecoxib, regional blocks, multimodal analgesia [8]
17. Disposition
- Discharge criteria: Successful closed reduction with acceptable alignment, intact neurovascular exam, adequate pain control, reliable follow-up
- Admission criteria: Open fracture, vascular compromise, compartment syndrome, failed reduction requiring urgent OR, polytrauma
- Observation: Consider for patients requiring procedural sedation with prolonged recovery, or borderline neurovascular status
- Orthopedic consultation triggers: [2]
- Concurrent dislocation, carpal fracture, ulnar styloid fracture
- Fracture instability or comminuted pattern
- Intra-articular involvement
- Radiocarpal or radioulnar ligament injury
- Neurovascular compromise
- Malunion on follow-up
18. Follow Up / Return Precautions
- Follow-up timing: Orthopedic or primary care follow-up within 3–5 days for repeat radiographs to assess for displacement; subsequent imaging at 2 weeks, then as clinically indicated [2][24]
- Return precautions (instruct patient):
- Increasing numbness/tingling in fingers (median nerve compression)
- Increasing pain despite medication, especially with passive finger extension (compartment syndrome)
- Color change, coolness, or swelling of fingers beyond what is expected
- Cast becomes too tight or too loose
- Fever or drainage from wound (if open fracture or post-surgical)
- Expected recovery: Most patients regain functional use by 3–6 months; stiffness is the most common long-term complication; home exercise programs are generally as effective as supervised therapy for most patients [20][24]
- Osteoporosis workup: All postmenopausal women and men >50 with a fragility-related Colles' fracture should be evaluated for osteoporosis (DEXA, FRAX, consider fracture liaison service) [10][14]
References
1. Percutaneous Pinning for Treating Distal Radial Fractures in Adults. — Karantana A, Handoll HH, Sabouni A. The Cochrane Database of Systematic Reviews. 2020.
2. Common Fractures of the Radius and Ulna. — Patel DS, Statuta SM, Ahmed N. American Family Physician. 2021.
3. External Fixation Versus Conservative Treatment for Distal Radial Fractures in Adults. — Handoll HH, Huntley JS, Madhok R. The Cochrane Database of Systematic Reviews. 2007.
4. Effect of a Single Dose of Oral Opioid and Nonopioid Analgesics on Acute Extremity Pain in the Emergency Department: A Randomized Clinical Trial. — Chang AK, Bijur PE, Esses D, Barnaby DP, Baer J. The Journal of the American Medical Association. 2017.
5. Nonpharmacologic and Pharmacologic Management of Acute Pain From Non-Low Back, Musculoskeletal Injuries in Adults: A Clinical Guideline From the American College of Physicians and American Academy of Family Physicians. — Qaseem A, McLean RM, O'Gurek D, et al. Annals of Internal Medicine. 2020.
6. Management of Acute Pain From Non-Low Back Musculoskeletal Injuries: Guidelines From AAFP and ACP. — Arnold MJ. American Family Physician. 2020.
7. Isolated Distal Radius Fracture Reductions in Adult Emergency Department Patients in a Large Healthcare System. — Mahnke SC, Newburn VH, Hooper CD, et al. The Western Journal of Emergency Medicine. 2026.
8. Management of Distal Radius Fractures: Evidence-Based Clinical Practice Guideline. — American Academy of Orthopaedic Surgeons (2020). 2020.
9. Pharmacologic Therapy for Acute Pain. — Amaechi O, Huffman MM, Featherstone K. American Family Physician. 2021.
10. Osteoporosis. — Morin SN, Leslie WD, Schousboe JT. The Journal of the American Medical Association. 2025.
11. Pharmacologic Treatment of Primary Osteoporosis or Low Bone Mass to Prevent Fractures in Adults: A Living Clinical Guideline From the American College of Physicians. — Qaseem A, Hicks LA, Etxeandia-Ikobaltzeta I, et al. Annals of Internal Medicine. 2023.
12. American Association of Clinical Endocrinologists/American College of Endocrinology Clinical Practice Guidelines for the Diagnosis and Treatment of Postmenopausal Osteoporosis-2020 Update. — Camacho PM, Petak SM, Binkley N, et al. Endocrine Practice : Official Journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists. 2020.
13. Postmenopausal Osteoporosis. — Walker MD, Shane E. The New England Journal of Medicine. 2023.
14. Osteoporosis. — Ye C, Ebeling P, Kline G. Lancet. 2025.
15. Evaluation and Diagnosis of Wrist Pain: A Case-Based Approach. — Shehab R, Mirabelli MH. American Family Physician. 2013.
16. Diagnosis of Occult Scaphoid Fractures and Other Wrist Injuries. Are Repeated Clinical Examinations and Plain Radiographs Still State of the Art?. — Gäbler C, Kukla C, Breitenseher MJ, Trattnig S, Vécsei V. Langenbeck's Archives of Surgery. 2001.
17. The Benefit of Magnetic Resonance Imaging for Patients With Posttraumatic Radial Wrist Tenderness. — Jørgsholm P, Thomsen NO, Besjakov J, Abrahamsson SO, Björkman A. The Journal of Hand Surgery. 2013.
18. American Academy of Orthopaedic Surgeons/American Society for Surgery of the Hand Clinical Practice Guideline Summary Management of Distal Radius Fractures. — Kamal RN, Shapiro LM. The Journal of the American Academy of Orthopaedic Surgeons. 2022.
19. Plating vs Closed Reduction for Fractures in the Distal Radius in Older Patients: A Secondary Analysis of a Randomized Clinical Trial. — Combined Randomised and Observational Study of Surgery for Fractures in the Distal Radius in the Elderly (CROSSFIRE) Study Group, Lawson A, Naylor J, et al. JAMA Surgery. 2022.
20. Outcomes and Complications in the Management of Distal Radial Fractures in the Elderly. — DeGeorge BR, Van Houten HK, Mwangi R, et al. The Journal of Bone and Joint Surgery. American Volume. 2020.
21. Complications of Operatively Treated Distal Radial Fractures. — Townsley SH, Pulos N, Shin AY. The Journal of Hand Surgery, European Volume. 2024.
22. Closed Unassisted Reduction in Emergency: A Technique for Unassisted Closed Reduction of Colles Fractures Without Equipment. — Vampertzis T, Barmpagianni C, Iosifidou E, Papastergiou S. The Journal of Emergency Medicine. 2020.
23. Closed Reduction Methods for Treating Distal Radial Fractures in Adults. — Handoll HH, Madhok R. The Cochrane Database of Systematic Reviews. 2003.
24. Practical Application of the 2020 Distal Radius Fracture AAOS/ASSH Clinical Practice Guideline: A Clinical Case. — Kamal RN, Shapiro LM. The Journal of the American Academy of Orthopaedic Surgeons. 2022.