Radius and Ulnar Fractures: Common Questions and Concerns - Orthopedics

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Understanding radius and ulnar fractures can be quite complex, especially when considering the potential complications and the mechanics of the wrist and hand. Let's address your questions one by one.


1. Can a radius or ulnar fracture cause displacement of the scaphoid or lunate bones?
Yes, fractures of the radius or ulnar bones can potentially lead to displacement or misalignment of the scaphoid or lunate bones, which are two of the carpal bones in the wrist. This is particularly true in cases of distal radius fractures, which are common and can affect the alignment of the wrist joint. If you notice a difference in the contour of your wrist when comparing it to the other hand, it could indicate a displacement. However, the absence of pain upon palpation is a good sign, but it does not rule out the possibility of a fracture or misalignment.

As for manual reduction (or "徒手復位"), it is generally not advisable for individuals without medical training to attempt this. Proper imaging, such as X-rays, is essential to assess the extent of the fracture and any associated dislocations. A healthcare professional should evaluate the injury to determine the best course of action, which may include immobilization or surgical intervention.


2. Why can’t I perform wrist extension (upward bending of the wrist)?
Inability to perform wrist extension could be due to several factors. One common reason is joint stiffness, which can occur after an injury or immobilization. Stiffness can develop in the joint capsule, ligaments, or surrounding muscles, leading to a decreased range of motion.
However, if the wrist is stiff but the scaphoid or lunate bones are intact, it is more likely due to joint stiffness rather than a direct injury to these bones. Other factors could include tendon injuries or inflammation, which can also limit movement. A thorough assessment by a healthcare provider, possibly including physical therapy, may be necessary to restore function.


3. What does it mean if I can spread my palm but cannot lift my fingers?
The ability to spread your palm while being unable to lift your fingers could indicate several issues. This may suggest that the intrinsic muscles of the hand, which are responsible for finger movements, may be affected. These muscles can be compromised due to nerve injuries, such as a median or ulnar nerve injury, or due to muscle weakness from disuse after an injury.

Additionally, if there is swelling or pain in the wrist or hand, it could further limit your ability to perform these movements. It’s essential to have a healthcare professional evaluate your hand function, as they can perform specific tests to determine the underlying cause of your symptoms.


Conclusion
In summary, radius and ulnar fractures can lead to complications involving the carpal bones, and any signs of displacement should be evaluated by a medical professional. If you are experiencing limitations in wrist movement or finger extension, it is crucial to seek medical advice. Rehabilitation, including physical therapy, may be necessary to regain full function and mobility. Always prioritize professional assessment and treatment to ensure the best outcomes for your recovery.