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The rest of the finger bones (the middle finger bones, and the proximal or innermost finger bones) are divided into base, shaft, and condyle (outer end). Extensive tendons surround the joints and move the fingers. On the front and back of each finger is a digital nerve and artery; these can also be injured when the finger is broken. [1]
Decreased sensation especially at the tips of the radial three and one half digits ( thumb, index finger, middle finger and radial portion of the ring finger ) can be due to median nerve injury. Swelling and displacement can cause compression on the median nerve which results in acute carpal tunnel syndrome and requires prompt treatment.
In some particular cases, the entire finger may be subject to amputation. The majority of traumatic injuries are work-related. Today, skilled hand surgeons can sometimes reattach the finger or thumb using microsurgery. Sometimes, traumatic injuries may result in loss of skin, and plastic surgeons may place skin and muscle grafts. [1]
A jammed finger can generally be diagnosed by a physical examination. Bone or joint deformity may indicate potential dislocations or fractures. [6] The basic structure of the finger includes three bones with joints in between each. [9] The joint closest to the tip is the distal interphalangeal (DIP) joint.
The term most commonly refers to a surface trauma where all layers of the skin have been torn away, exposing the underlying structures (i.e., subcutaneous tissue, muscle, tendons, or bone). This is similar to an abrasion but more severe, as body parts such as an eyelid or an ear can be partially or fully detached from the body.
Heberden's nodes typically develop in middle age, beginning either with a chronic swelling of the affected joints or the sudden painful onset of redness, numbness, and loss of manual dexterity. This initial inflammation and pain eventually subsides, and the patient is left with a permanent bony outgrowth that often skews the fingertip sideways.
Open fractures are often caused by high energy trauma such as road traffic accidents and are associated with a high degree of damage to the bone and nearby soft tissue. [1] Other potential complications include nerve damage or impaired bone healing, including malunion or nonunion. The severity of open fractures can vary.
Cheiralgia paraesthetica (Wartenberg's syndrome) is a neuropathy of the hand generally caused by compression or trauma to the superficial branch of the radial nerve. [1] [2] The area affected is typically on the back or side of the hand at the base of the thumb, near the anatomical snuffbox, but may extend up the back of the thumb and index finger and across the back of the hand.