Carpal Hyperextension Injury
This page is for educational purposes only and is not a substitute for veterinary diagnosis or emergency care. Always consult your primary veterinarian or a rehabilitation veterinarian before starting treatment. If your pet cannot walk, has sudden paralysis, severe pain, or breathing difficulty, seek urgent veterinary attention.
What is Carpal Hyperextension Injury?
Also known as: dropped wrist; carpal collapse; palmar carpal ligament injury; carpal hyperextension sprain.
The canine carpus is a complex of joints stabilised by ligaments and a strong palmar fibrocartilage/ligament support. Hyperextension injury — from falls, jumps from height, trauma, or chronic overload — damages these palmar structures so the carpus sinks toward the ground when weight-bearing.
Severity ranges from mild sprain to complete disruption with plantigrade stance. Working and sporting dogs, as well as pets that leap from furniture or vehicles, are at risk. Diagnosis involves orthopaedic exam, stress radiographs, and sometimes advanced imaging.
Treatment may include coaptation, custom orthoses, activity modification, or surgical arthrodesis for severe instability. Rehabilitation supports swelling control, protected strengthening, gait retraining, and brace tolerance when prescribed.
Common signs to watch for
Signs vary by severity and by whether your pet is a dog or cat. Owners of dogs often notice:
- Forelimb lameness after a jump, fall, or traumatic event
- Carpus that appears flatter or more collapsed when standing
- Swelling, heat, or pain over the carpus
- Reluctance to jump down; shortened stride
- Chronic cases: persistent hyperextension and compensatory shoulder/elbow strain
Causes & contributing factors
- Acute traumatic hyperextension (falls, jumps from height, collisions)
- Repetitive overload in working or sporting dogs
- Degenerative or immune-mediated joint disease contributing to collapse (less typical primary pattern)
- Inadequate recovery after prior carpal sprain
How veterinary rehabilitation helps
Early rehab emphasises protection (rest, appropriate bandaging/brace use per vet), oedema management, and maintaining shoulder and elbow motion without stressing healing palmar tissues.
As stability allows, progressive weight-bearing, proprioception, and strengthening rebuild forelimb function. Owners learn safe surfaces, ramp use, and how to check brace fit.
After arthrodesis, rehab focuses on adjacent joint mobility, gait re-education, and return to daily living tasks within surgical limits.
Rehabilitation plans at RehabVet are individualised after a veterinary assessment. We coordinate with your primary vet when imaging, medication, or surgery is part of the overall plan.
Modalities & services commonly used at RehabVet
Depending on your pet’s examination findings, comfort, and goals, a plan may include one or more of the following:
Expected rehabilitation goals
Goals are set for the individual patient. Typical aims may include (not guarantees — outcomes vary):
- Protect healing carpal support structures
- Reduce pain and swelling
- Restore safe weight-bearing and gait with or without orthosis
- Strengthen supporting musculature without re-injury
- Teach owners home management and activity modification
We do not publish invented success percentages. Progress is tracked clinically (gait, strength, range of motion, pain behaviours, and home function) and plans are adjusted over time.
When to seek veterinary care
- Sudden dropped carpus or non-weight-bearing forelimb lameness
- Carpal swelling after a jump or fall
- Worsening collapse despite rest
- Skin sores or intolerance under a prescribed brace
- Will a brace fix carpal hyperextension?
Orthoses can support selected injuries and chronic cases, but they do not regenerate torn ligaments. Severe instability may still need surgery. Fitting and rehab guidance matter for comfort and function.
- Can my dog return to agility after carpal injury?
Possibly, depending on severity and treatment. Return requires veterinary clearance and graded sport progressions — jumping down from contacts is a particular risk.
- Is carpal hyperextension the same as arthritis?
No, though chronic instability can lead to secondary osteoarthritis. Acute hyperextension is primarily a ligamentous/support-structure injury.
Related reading & patient stories
Book a rehabilitation assessment
If your pet has been diagnosed with Carpal hyperextension, or you are noticing mobility changes, our team can assess and design a multimodal rehab plan.
Educational content only — not a diagnosis. For emergencies, contact your nearest veterinary hospital.