Jammed finger

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Jammed Finger
Jammed ring finger day 2.jpg
Jammed ring finger with minor bruising two days after injury
Symptoms Swelling, pain, limited range of motion
TypesSprain, dislocation, fracture
CausesAxial loading to the finger
Diagnostic method Physical Examination or X-ray
TreatmentRest, Ice, Compression, Elevation

Jammed finger is a colloquialism referring to a variety of injuries to the joints of the fingers, resulting from axial loading beyond that which the ligaments can withstand. Common parts of the finger susceptible to this type of injury are ligaments, joints, and bones. The severity of the damage to the finger increases with the magnitude of the force exerted by the external object on the fingertip. [1] Toes may become jammed as well, with similar results.

Contents

Signs and symptoms

There are a number of possible signs which indicate a jammed finger, which vary depending on the severity of the injury. These include swelling, reduction of flexibility of joints, pain, and tenderness. [1] There may also be discolouration of the skin due to bruising. These symptoms may persist for up to eight weeks. [2] Initial signs of a dislocation include abnormal joint angulation (bones pointing at abnormal angles from a joint), while more serious fractures are indicated by midshaft angulation and rotation, [3] where the bone itself appears broken or twisted.

Causes

Jammed fingers can occur when a force is applied in direction of the length of the finger from the fingertip (axial loading). Therefore, any recreational activity in which the fingers are held in an outstretched position has the possibility of resulting in a jammed finger. This type of injury is particularly common in ball related sports, [4] where an incorrect catching method may lead to the ball making contact with the tip of the finger. They may also occur if the finger is crushed between two surfaces, such as a door and door frame. [5]

Diagnosis

A jammed finger can generally be diagnosed via physical examination. The relative position of the bones of the finger give an indication as to potential dislocations or fractures. [3] However, it is recommended to seek medical attention regardless of whether or not a dislocation or fracture is evident. [6] This is because untreated jammed fingers can lead to future pain and stiffness, with joint surface fractures increasing the risk of arthritis. [6] The areas around the injury may be palpated in order to ascertain the areas of maximum pain. [2] If the injury is a joint injury (namely a sprain or dislocation), the point of maximum pain will be close to the joint rather than mid-phalanx (mid-bone). [2] Due to the risk of dislocations or fractures, stability testing is not recommended until after an x-ray has been conducted and the presence of a dislocation or fracture has been confirmed or rejected. [2] In extremely painful cases, a digital nerve block, where anaesthetic is injected in the web to either side of the affected finger, may be employed to enable assessment of the injury. [2] X-rays may be employed to achieve a more accurate diagnosis of a jammed finger, enabling the identification of varying types of dislocation or fractures. In order to account for all possibilities, it is recommended that a variety of views (lateral, oblique, and anteroposterior) are observed. [2]

Joints of the finger DIP, PIP and MCP joints of hand.jpg
Joints of the finger

A jammed finger can be split into three categories; a sprain, a dislocation, or a fracture. Sprains can be further split into three sub-categories based on severity (first, second and third degree sprains in order of increasing severity). [1] First degree sprains involve a stretching of the ligament, without a tear. Second degree sprains involve a partial tear of the ligament, while third degree sprains are complete tears of the ligament. [1] Third degree sprains commonly result in a dislocation of the finger. [1] Sprains are characterised by swelling of the joint, reduced range of motion, and pain.

Dislocations can be categorised based on location and type. The finger can be split into three bones and two joints in an alternating order. From the fingertip to the knuckle, these are as follows; distal phalanx, distal inter-phalangeal (DIP) joint, middle phalanx, proximal inter-phalangeal (PIP) joint, and proximal phalanx. DIP dislocations are much less common than PIP dislocations, [2] due to the "stability provided by strong collateral ligaments, palmar plates, and tendinous insertions, as well as the short lever arm of the distal phalanx". [7] Dislocations can be categorised based on the direction that the fingertip moves in relation to the knuckle, be it in the direction of the palm (volar dislocation), or the direction of the back of the hand (dorsal dislocation). Of the two, dorsal dislocations are more common. [3] If reduction has been attempted, an x-ray of the dislocation should appear concentric if successful. [2] However, if there is a fracture present, there will be a misalignment of the joint, which will be evident from the radiograph. [2] Bach suggests a referral to a hand surgeon if a misalignment is present. [2]

Fractures are instances where the bone's structural integrity has been compromised. This is indicated by midshaft pain, as well as visual midshaft angulation or rotation. [3] As with any skeletal injury, an x-ray can be conducted to verify the presence of a fracture. [1] The distal phalanx is especially vulnerable to avulsion fractures, where a fragment of bone is ripped off when the tendon separates from the phalanx. [1] Avulsion fractures are especially common following a first time dislocation. [1] These are especially concerning, as it may indicate a complete tear of the extensor digitorum tendon. If left untreated, this may lead to permanent DIP extensor lag (inability to fully straighten the finger). [8]

A variation of the jammed finger where the extensor tendons on the back of the fingers are damaged is known as 'mallet finger'. [9] Mallet fingers are caused by the same finger trauma as jammed fingers, and are characterised by a difficulty extending the finger or opening the hand. They may also exhibit other symptoms common to jammed fingers such as swelling, pain, and tenderness.

Treatment

For first and second degree sprains, the ligaments have not been completely ruptured. In these cases, the RICE method is the recommended option. RICE stands for Rest, Ice, Compression, and Elevation, and the method aims to reduce bleeding into the location of the injury to reduce swelling. [10] The method is as follows;

Rest

The injured extremity should be rested and not put to use immediately following the injury. This reduces the likelihood of further retraction of muscle stumps, which can lead to 'holes' in the muscle. [10] Additionally, the size of the haematoma decreases as well as the connective tissue scar. [10]

Ice

Early use of cold therapy (cryotherapy) reduces the swelling around the injured area, as well as reducing haematoma size. It has also been associated with accelerated early regeneration compared to injuries that were not iced directly after occurring. [10] Icing of the injury should be applied in stretches of 15–20 minutes every 30–60 minutes for around six hours. However, the pioneer of the RICE method Gabe Mirkin now suggests that cryotherapy should only be employed if the pain is unbearable, as some studies suggest that cryotherapy may delay healing [11]

Compression

Compressing the injury reduces intramuscular blood flow due to the constriction of veins and arteries, reducing haematoma size. However, there is still debate as to whether it accelerates the healing process. [10]

Elevation

Finally, elevation of the affected area above the heart reduces the blood flow to the injured region due to the difference in hydrostatic pressure between the finger and the heart. This has similar effects to the first three components of the method. [10]

Following the implementation of this method, splinting is recommended to keep the digit immobile. The skin under the splint should be carefully observed during the duration of its use due to the number of complications that can arise, including ulceration, maceration, and tape allergy. [5] When removing the splint to assess the skin underneath, it is important that the digit remain in the splinted position. [2] These complications can be reduced by including a layer of tubular gauze or a moleskin lining between the splint and the skin of the finger. [5] If no splints are easily available, buddy taping can be employed. [1] This is where the affected digit is taped to an adjacent finger to provide support. [1] This limiting of motion helps to reduce ligament stress, which is important in the early stages of healing. [1] If swelling persists, anti-inflammatory medications may be prescribed. [1]

DIP Dislocation Finger luxation D2 DIP.png
DIP Dislocation
PIP Dislocation Finger luxation D3 PIP l.png
PIP Dislocation

A third degree sprain often results in a dislocation. [1] Volar and dorsal dislocations are treated differently, and treatment should be withheld if a fracture is suspected. In the case of a dislocation, closed reduction can be attempted. [3] This is where the joint is realigned without the need for surgery, and can be conducted immediately after the incident. For a dorsal dislocation, reduction should be conducted by undertaking distal traction of the fingertip, then applying volar pressure to the phalanx in the distal direction of the dislocated joint, and dorsal pressure to the other phalanx. [3] Ensure that the joint can be moved with no pain. After this, a splint at a small bend is employed to maintain slight flexion and prevent hyper-extension of the joint for the next week. [3] If hyper-extension of the joint is too painful or causes skin blanching, the joint may be placed in a neutral position. [2] Limited movement of the affected digit is recommended to occur soon after the injury to limit loss of range of motion. [2] This may only include small degrees of flexion, depending on the severity of the injury. For volar dislocations, reduction should be conducted by undertaking distal traction of the fingertip, then applying distal pressure to the phalanx in the distal direction of the dislocated joint, and volar pressure to the other phalanx. [3] Unlike dorsal dislocations, after performing reduction on a volar dislocation, the joint must remain splinted at full extension. [3] After reduction, tendons may be tested through active flexion and extension. Due to swelling and pain, a full range of motion is unlikely to occur, however if no active flexion or extension can be done, it indicates a high possibility of a tendon rupture. [2] If no avulsion fracture is present, the splint should be in place for four to six weeks to allow the torn central slip to heal in the correct location, with an additional four to six weeks splinting during sporting activities. [8] If there is an avulsion fracture involving more than thirty percent of joint space, an orthopedic surgeon should be consulted, as open reduction and internal fixation may be required. [8] If the dislocation does not reduce easily, it may be necessary to administer local anaesthetic, or in extreme cases open reduction may be required. [3] There are currently four causes of an irreducible DIP joint dislocation, brought about by an anatomic block, where there is difficulty accessing parts of the finger. [7] These causes are: "a palmar plate avulsion off the middle phalanx with interposition in the joint, entrapment of the flexor digitorum profundus (FDP) tendon behind one condyle of the middle phalanx, button-hole tear through the palmar plate, and entrapment of the distal end of the middle phalanx in a longitudinal split in the FDP tendon". [7] Any of these cases will require open reduction, conducted under anesthetic. [7] Following open reduction, the joint should be immobilised for two to four weeks in a splint, after which exercises may be performed to achieve joint stability. [7] Pooled literature suggests that the initial treatment of jammed fingers should be conservative, without open reduction. [9] Damron and colleagues suggest an approach that only requires open surgery for the cause listed above, and cases where after six months observation conservative treatment has failed. [9] This approach is suggested due to the relative cost efficiency of conservative treatment, as there are fewer office visits, a single x-ray, and inexpensive splint materials compared to open surgery which requires multiple appointments, professional costs of surgery, as well as anaesthetic. [9]

Fractures involve the breaking of the bone. [12] As such, it is recommended that medical attention is sought, so as to avoid the bone healing with a malunion, which may result in post-traumatic arthritis. [12] Additional surgery may need to be conducted to properly treat a malunion. As with a dislocation, closed reduction is attempted before open reduction. [13] The finger is then splinted to prevent further injury to the digit as it heals. A number of splints have been proposed for jammed fingers, [9] depending on the reduction conducted. These include taping, Stack splint, padded aluminum malleable splint, Piplex splint, elastic double finger bandage, perforated plastic splint, molded polythene splint, and Abouna splint. [9] However, the type of splint is less important than patient compliance with the use and time spend with the splint. [13] Splinting for less than the recommended duration may lead to less effective healing, a loss of function, and permanent extensor lag. [8]

In any of the above cases, depending on severity, stretching and strengthening programmes may be required in the rehabilitation stage. [1] Range of motion exercises are required to prevent stiffness in addition to potentially long term loss of range of motion of the affected digit. [8] Digital edema-control techniques will reduce the time taken to regain range of motion. [2] Examples of such techniques include massage and compressive wraps. [2] An increased amount of swelling during the rehabilitation period is indicative of an undiagnosed fracture or an overly aggressive rehabilitation programme. [2]

Prevention

Due to the unpredictable nature of suffering a jammed finger, it is difficult to prevent such an injury from occurring without obstructing day-to-day activities. The majority of jammed fingers occur in the dominant hand, possibly due to the fact that most activities are conducted with this hand. [13] However, it is possible to prevent specific cases, such as suffering a jammed finger by incorrectly catching a ball, by learning the proper technique. [4] It has been recommended that the affected finger be taped to prevent the same injury from occurring when conducting activities with a high risk of sustaining a jammed finger, such as ball sports. [2]

See also

Related Research Articles

<span class="mw-page-title-main">Sprain</span> Damage to one or more ligaments in a joint

A sprain is a soft tissue injury of the ligaments within a joint, often caused by a sudden movement abruptly forcing the joint to exceed its functional range of motion. Ligaments are tough, inelastic fibers made of collagen that connect two or more bones to form a joint and are important for joint stability and proprioception, which is the body's sense of limb position and movement. Sprains may be mild, moderate, or severe, with the latter two classes involving some degree of tearing of the ligament. Sprains can occur at any joint but most commonly occur in the ankle, knee, or wrist. An equivalent injury to a muscle or tendon is known as a strain.

<span class="mw-page-title-main">Bone fracture</span> Physical damage to the continuity of a bone

A bone fracture is a medical condition in which there is a partial or complete break in the continuity of any bone in the body. In more severe cases, the bone may be broken into several fragments, known as a comminuted fracture. A bone fracture may be the result of high force impact or stress, or a minimal trauma injury as a result of certain medical conditions that weaken the bones, such as osteoporosis, osteopenia, bone cancer, or osteogenesis imperfecta, where the fracture is then properly termed a pathologic fracture.

<span class="mw-page-title-main">Maisonneuve fracture</span> Medical condition

The Maisonneuve fracture is a spiral fracture of the proximal third of the fibula associated with a tear of the distal tibiofibular syndesmosis and the interosseous membrane. There is an associated fracture of the medial malleolus or rupture of the deep deltoid ligament of the ankle. This type of injury can be difficult to detect.

<span class="mw-page-title-main">Joint dislocation</span> Medical injury

A joint dislocation, also called luxation, occurs when there is an abnormal separation in the joint, where two or more bones meet. A partial dislocation is referred to as a subluxation. Dislocations are often caused by sudden trauma on the joint like an impact or fall. A joint dislocation can cause damage to the surrounding ligaments, tendons, muscles, and nerves. Dislocations can occur in any major joint or minor joint. The most common joint dislocation is a shoulder dislocation.

<span class="mw-page-title-main">Distal radius fracture</span> Fracture of the radius bone near the wrist

A distal radius fracture, also known as wrist fracture, is a break of the part of the radius bone which is close to the wrist. Symptoms include pain, bruising, and rapid-onset swelling. The ulna bone may also be broken.

<span class="mw-page-title-main">Avulsion fracture</span> Tearing away of a bone by physical trauma

An avulsion fracture is a bone fracture which occurs when a fragment of bone tears away from the main mass of bone as a result of physical trauma. This can occur at the ligament by the application of forces external to the body or at the tendon by a muscular contraction that is stronger than the forces holding the bone together. Generally muscular avulsion is prevented by the neurological limitations placed on muscle contractions. Highly trained athletes can overcome this neurological inhibition of strength and produce a much greater force output capable of breaking or avulsing a bone.

<span class="mw-page-title-main">Ankle fracture</span> Medical condition

An ankle fracture is a break of one or more of the bones that make up the ankle joint. Symptoms may include pain, swelling, bruising, and an inability to walk on the injured leg. Complications may include an associated high ankle sprain, compartment syndrome, stiffness, malunion, and post-traumatic arthritis.

<span class="mw-page-title-main">Mallet finger</span> Type of fracture

A mallet finger, also known as hammer finger or PLF finger or Hannan finger, is an extensor tendon injury at the farthest away finger joint. This results in the inability to extend the finger tip without pushing it. There is generally pain and bruising at the back side of the farthest away finger joint.

<span class="mw-page-title-main">Galeazzi fracture</span> Medical condition

The Galeazzi fracture is a fracture of the distal third of the radius with dislocation of the distal radioulnar joint. It classically involves an isolated fracture of the junction of the distal third and middle third of the radius with associated subluxation or dislocation of the distal radio-ulnar joint; the injury disrupts the forearm axis joint.

<span class="mw-page-title-main">Interphalangeal joints of the hand</span> Hinge joints between finger phalanges

The interphalangeal joints of the hand are the hinge joints between the phalanges of the fingers that provide flexion towards the palm of the hand.

<span class="mw-page-title-main">Triangular fibrocartilage</span> Anatomical feature in the wrist

The triangular fibrocartilage complex (TFCC) is formed by the triangular fibrocartilage discus (TFC), the radioulnar ligaments (RULs) and the ulnocarpal ligaments (UCLs).

<span class="mw-page-title-main">Ulnar collateral ligament injury of the thumb</span> Medical condition

Gamekeeper's thumb is a type of injury to the ulnar collateral ligament (UCL) of the thumb. The UCL may be merely stretched, or it may be torn from its insertion site into the proximal phalanx of the thumb. This condition is commonly observed among gamekeepers and Scottish fowl hunters, as well as athletes. It also occurs among people who sustain a fall onto an outstretched hand while holding a rod, frequently skiers grasping ski poles.

<span class="mw-page-title-main">Bennett's fracture</span> Medical condition

Bennett fracture is a type of partial broken finger involving the base of the thumb, and extends into the carpometacarpal (CMC) joint.

<span class="mw-page-title-main">Palmar plate</span>

In the human hand, palmar or volar plates are found in the metacarpophalangeal (MCP) and interphalangeal (IP) joints, where they reinforce the joint capsules, enhance joint stability, and limit hyperextension. The plates of the MCP and IP joints are structurally and functionally similar, except that in the MCP joints they are interconnected by a deep transverse ligament. In the MCP joints, they also indirectly provide stability to the longitudinal palmar arches of the hand. The volar plate of the thumb MCP joint has a transverse longitudinal rectangular shape, shorter than those in the fingers.

The hand is a very complex organ with multiple joints, different types of ligament, tendons and nerves. Hand disease injuries are common in society and can result from excessive use, degenerative disorders or trauma.

Jersey finger, also known as rugby finger, is a finger-related tendon injury that is common in sport and can result in permanent loss of flexion of the end of the finger if not surgically repaired. The injury is common when one player grabs another's jersey with the tips of one or more fingers while that player is pulling or running away. It is the most common closed flexor tendon injury and occurs in the ring finger in 75% of cases.

<span class="mw-page-title-main">Index of trauma and orthopaedics articles</span>

Orthopedic surgery is the branch of surgery concerned with conditions involving the musculoskeletal system. Orthopedic surgeons use both surgical and nonsurgical means to treat musculoskeletal injuries, sports injuries, degenerative diseases, infections, bone tumours, and congenital limb deformities. Trauma surgery and traumatology is a sub-specialty dealing with the operative management of fractures, major trauma and the multiply-injured patient.

<span class="mw-page-title-main">Broken toe</span> Medical condition

A broken toe is a type of bone fracture. Symptoms include pain when the toe is touched near the break point, or compressed along its length. There may be bruising, swelling, stiffness, or displacement of the broken bone ends from their normal position.

<span class="mw-page-title-main">Broken finger</span> Medical condition

A broken finger or finger fracture is a common type of bone fracture, affecting a finger. Symptoms may include pain, swelling, tenderness, bruising, deformity and reduced ability to move the finger. Although most finger fractures are easy to treat, failing to deal with a fracture appropriately may result in long-term pain and disability.

Acquired hand deformity refers to the structural or functional abnormalities that develop in the hand. There are multiple varying causes of acquired hand deformity, triggering significant consequences and complications. Trauma, including blunt force, penetrating injuries, burns, and sports-related incidents, is a primary cause of acquired hand deformities. Inflammatory conditions such as rheumatoid arthritis, gouty arthritis, and systemic lupus erythematosus can also contribute to hand deformities by affecting the joints. Degenerative arthritis, specifically osteoarthritis, functions to evoke impaired hand function due to the gradual deterioration of cartilage. Neurological disorders like cerebral palsy can result in hand contractures due to increased muscle tone and stiffness. There are different types of acquired hand deformities, each with distinct characteristics and underlying causes, such as boutonnière deformity, Dupuytren's contracture, gamekeeper's thumb, hand osteoarthritis deformity, mallet finger, swan-neck deformity, ulnar claw hand, among many others.

References

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