Finger Dislocation may be defined as the injury in the finger due to trauma, road traffic accident, motorbike accident, gunshot injury in finger joint and cause the loosen of tendon, cartilage, ligament, synovium, bursa, and soft tissue in where the finger bones move apart or sideways so the ends of the bones are no longer aligned normally. Finger dislocations usually happen when the finger is bent backward beyond its normal limit of motion.
Finger joint dislocation may be a common hand injury. Finger dislocation can occur at the proximal interphalangeal (PIP), distal interphalangeal (DIP), or metacarpophalangeal (MCP) joints. This paper discusses the epidemiology, anatomy, examination, imaging, treatment, and complications of finger dislocation.
Fingers have three joints – the metacarpophalangeal (MCP) joint, the proximal interphalangeal (PIP) joint, and therefore the distal interphalangeal (DIP) joint. The MCP joint is between the metacarpals and proximal phalanges. The PIP joint may be a hinge joint between proximal and middle phalanges. The DIP is additionally a hinge joint and is between the center and distal phalanges. The range of motion of those joints allows for flexion and extension, which provides grasping, pinching, and clawing or reaching functions of the fingers. the center phalanx range of motion at the PIP joint is 105 5-degrees and accounts for the bulk of the flexion of the fingertip during grasping. Flexion and extension of the digit also are possible at the metacarpophalangeal joint; however, the MCP joint also can perform adduction, abduction, and circumduction. [rx]
The bones that structure the joints of the fingers are known by the medical terms phalanges and metacarpal bones. Any of those joints are often dislocated in an injury:
- Distal interphalangeal joints – are within the finger joints closest to the fingernails. Most dislocations in these joints are caused by trauma, injury, osteoarthritis and there’s often an open wound within the location of the dislocation.
- Proximal interphalangeal joints – It is the center joints of the fingers. A dislocation in one among these joints is additionally referred to as a jammed finger or coach’s finger and it’s the foremost frequent hand injury in athletes, and it’s especially common among those that play ball-handling sports, like football, cricket, basketball, and athletic game. In most cases, the dislocation happens because the fingers are bent backward when an athlete, cricketer tries to catch a ball or block an attempt. Proximal hinge joint dislocations can also happen when a cricketer, athlete’s fingers are twisted or bent by an opponent, especially when two athletes wrestle or grab for control of a ball.
- Metacarpophalangeal joints – are within the knuckles, located where the fingers meet the remainder of the hand. These joints connect the metacarpal bones within the palm with the primary row of phalanges within the finger. Because these joints are very stable, knuckle dislocations are less common than the opposite two types. When metacarpophalangeal dislocations do occur, they’re usually dislocations of either the index or pinkie (pinky).
The phalangeal joints have important stabilizers that provide necessary support during motion. Joint stabilizers are both static and dynamic. Static stabilizers contain non-contractile tissue, including the collateral ligaments, volar plate, dorsal capsule, sagittal bands, and ulnar and radial collateral ligaments. The volar plate is an important stabilizer because it reinforces the volar side of the joint capsule and maintains stability by preventing hyperextension of the finger joints. The collateral ligaments provide stabilization against radial and ulnar deviation of the interphalangeal joints. Sagittal bands encircle the MCP joint to stay the extensor tendon centralized and to stop bowstringing. Dynamic stabilizers include extrinsic and intrinsic tendons and muscles, and two important dynamic stabilizers are the central slip and lateral bands. The central slip tendon is found dorsally and provides for PIP joint extension, and therefore the lateral bands provide DIP joint extension. Finally, arteria digitalis and nerves are found vulgarly and appear on both ulnar and radial sides of the digit
Causes of Finger Dislocation
Finger dislocations can involve the MCP, PIP or DIP joints and should occur within the dorsal, volar, or lateral planes. Dislocations categorize, consistent with the position of the distal bone relative to the more proximal bone.[rx]
Hyperextension or high-energy axial loads at the MCP joint may result in dislocation. MCP joint dislocation infrequently occurs due to the protection against hyperextension by the volar plate and radial and ulnar deviation by the collateral ligaments. the foremost common MCP joint dislocation is the index. MCP joint dislocation of the center finger occurs more frequently when it’s subjected to ulnar stress while in hyperextension.[rx] commonest MCP joints dislocate dorsally.[rx] the standard presentation of MCP joint dislocation is with the IP joint in flexion and therefore the MCP joint in extension. A nonreducible dislocation with dimpling on the volar surface indicates volar plate interposition.[rx]
PIP joint dislocations are the foremost common dislocation thanks to sports and also are referred to as “coach’s finger.” the standard presentation of PIP joint dislocation may be a deformity, decreased range of motion, and pain. PIP joint dislocations can classify into dorsal, volar, and lateral dislocations. PIP joint dislocation is most ordinarily dorsal; however, volar dislocation correlates with a better rate of complications and harder reductions.[rx][rx] Dorsal dislocation results result from longitudinal compression and hyperextension commonly by a ball hitting the fingertip.
Dorsal PIP joint dislocation most ordinarily occurs at the center finger and is related to the volar plate, collateral ligament, and dorsal joint capsule injury. Swan neck deformity most frequently occurs in dorsal dislocations and results from volar plate injury. Trapping of the volar plate inside the joint may occur, causing malalignment and oblique rotation resulting in challenging reductions. Volar dislocation of the PIP joint can occur with and without rotation of the intermediate phalanx. Volar dislocation is infrequent and may be related to injury to the central slip of the extensor tendon. Untreated rupture of the central slip after PIP joint dislocation is related to pseudo-boutonniere (PIP flexion contracture). Pseudo-boutonniere may be a chronic PIP joint flexion with the absence of DIP extension.
Lateral PIP dislocation also can occur and involves a tear of the collateral ligaments. The patient presents with joint instability and therefore the enlargement of the joint on radiographs. Finally, rotary volar dislocations may occur when the phalanx dislocate and rotates around one collateral ligament, allowing the proximal phalanx to wedge itself between the lateral band and extensor tendon. The classic lateral radiographic finding has the outline of a Chinese finger-trap.
DIP joint dislocations typically present with deformity at the fingertip place. Dorsal, lateral, and volar DIP joint dislocations are all possible. Dorsal DIP joint dislocations occur most commonly are related to fractures and skin injuries. they’re not always related to flexor tendon avulsions but may have an interposed volar plate causing a non-reducible dislocation. Volar DIP joint dislocations are almost like dorsal PIP joint dislocations inhere both are related to extensor tendon injuries. The lateral DIP joint is more likely to possess post-reduction instability than volar or dorsal dislocations. Isolated DIP joint dislocation without related injuries like soft tissue or fractures is rare and is usually managed with closed reduction and splinting within the emergency departments
Symptoms of Finger Dislocation
The following symptoms are common with any type of dislocation.[rx]
- Intense pain
- Joint instability
- Deformity of the joint area
- Reduced muscle strength
- Bruising or redness of joint area
- Difficulty moving joint
- Stiffness
Diagnosis of Finger Dislocation
History and Physical
- Examiners must listen to a complete medical history, which includes risk factors such as Ehlers-Danlos syndrome, mechanism of injury, handedness, previous finger injuries, occupation, and hobbies. Simple lighting should be used to by your doctor the hand for skin integrity, ecchymosis, swelling, or bony deformity.
- If skin integrity becomes compromised due to laceration or abrasion injury, the goal of the examiner is to evaluate in a bloodless field if possible. Examiners may use finger tourniquets like, in a patient with adequate blood circulation, an anesthetic with epinephrine can be used.[rx] Finger examination should be through its complete active and passive range of motion.[rx]
- A thorough neurovascular examination is imperative in the evaluation of the injured hand. The injured digit should be compared to the same digit or placed on the unaffected hand for light-touch, pinprick, 2-point discrimination to identify any potential digital nerve injury. The digital or distal artery can be examined by comparison to an unaffected digit on the opposite hand with the use of a capillary refill.
- If the examiner identifies the exact deformity, the examiner must also determine if there is any rotation or angulation injury. Hyperextension of the finger joint should be performed to assessments the competency of the volar plate. Lateral stress of the finger joint is performed to test the collateral ligaments. To evaluate the integrity, the durability of the central slip, the Elson test is preform.
- To assess for rotation the patient is asked to make a fist if possible, and all the fingertips should point toward the scaphoid bones. Overlapping or scissoring indicates a rotational component had occurred to the injury. Rotated or angulated fractures are also identifiable by comparison of the digital palpation and nails with the unaffected hand. Palpation can be used to determine the location of maximum tenderness.[rx]
Imaging
Standard plain radiographs, usually a minimum of 2 views
- Generally, pre- and post-reduction X-rays are recommended as the first choice. Initial X-ray can confirm the diagnosis as well as evaluate for any concomitant fractures. Post-reduction radiographs confirm successful reduction and can exclude any other bony injuries, lessons, that may have been caused during the reduction procedure.[rx]
- In certain instances, if initial X-rays are normal but the injury is suspected, there is a possible benefit of weight-bearing views to further assess for disruption of ligamentous, function, structures, and the need for surgical intervention. This may be utilized with AC joint separations.[rx]
- Nomenclature: Joint dislocations are named based on the distal component in relation to the proximal one or more bones.[rx]
Ultrasound
- Ultrasound may be useful in an acute setting, particularly with shoulder dislocations. Although it may not be as accurate in detecting any associated fractures are present or not, in one observational study ultrasonography identified 100% of shoulder dislocations, and was 100% sensitive in identifying successful reduction position when compared to plain radiographs.[rx] Ultrasound may also have utility in diagnosing AC joint dislocations.[rx]
- In infants or children <6 months of age with involving developmental dysplasia of the hip or congenital hip dislocation, ultrasound is the imaging study of choice as the proximal femoral epiphysis has not significantly ossified at this age.[13]
Cross-sectional imaging (CT or MRI)
- Plain films are generally sufficient in making a joint dislocation diagnosis. However, cross-sectional imaging can subsequently be used to better define and evaluate more accurate abnormalities that may be missed or not clearly seen on plain X-rays. CT is useful in further analyzing any bony aberrations, muscle, tendon, and CT angiogram may be utilized if the vascular injury is suspected.[rx] In addition to improved visualization of bony abnormalities, MRI is more helpful for a more detailed inspection of the joint-supporting structures in order to assess for ligamentous and other soft tissue injury.
Evaluation
- The standard of care for evaluating injuries, trauma, dislocation to the hand is plain film imaging. For each affected digit, true lateral, anterior-posterior, and oblique views most often are necessary. The films have clear view of the affected digit. Unaffected fingers must not obscure any view of the affected digit.
- Examiners should keep in mind those rotational deformities and fractures are most commonly diagnosed on the physical exam rather than on plain films.[rx] In addition to plain films, ultrasound continues to be an area of research regarding the identification of fractures and tendon ruptures.[rx]
Treatment / Management
Treatment of MCP, PIP, and DIP joint dislocation may be nonpharmacological, operative, or nonoperative depending on the ease of reduction, post-reduction stability, or involvement of the volar plate or other stabilizing structures of the joint. Before any reduction, a digital nerve block frequently using lidocaine, bupivacaine, or tetracaine injected at the dorsal base of the dislocated finger will provide immediate anesthesia.[rx]
Do no HARM for 72 hours after injury
- Heat—hot baths, electric heat, saunas, heat packs, etc has the opposite effect on the blood flow. Heat may cause more fluid accumulation in the fracture joints by encouraging blood flow. Heat should be avoided when inflammation is developing in the acute stage. However, after about 72 hours, no further inflammation is likely to develop and heat can be soothing.
- Alcohol stimulates the central nervous system that can increase bleeding and swelling and decrease healing.
- Running, and walking may cause further damage, and causes healing delay.
- Massage also may increase bleeding and swelling. However, after 72 hours of your fracture, you can take a simple message, and applying heat may be soothing the pain.
Medication
The following medications may be considered by your doctor to relieve acute and immediate pain, long term treatment
- Antibiotic – Cefuroxime or Azithromycin, or Flucloxacillin or any other cephalosporin/quinolone, meropenem antibiotic must be used to prevent infection or clotted blood removal to prevent further swelling, inflammation, and edema.
- NSAIDs – Prescription-strength drugs that reduce both pain and inflammation. Pain medicines and anti-inflammatory drugs help to relieve pain and stiffness, allowing for increased mobility and exercise. There are many common over-the-counter medicines called non-steroidal anti-inflammatory drugs (NSAIDs). They include first choice NSAIDs is Ketorolac, then Etoricoxib, then Aceclofenac, naproxen.
- Muscle Relaxants – These medications provide relief from spinal muscle spasms, spasticity. Muscle relaxants, such as baclofen, tolperisone, eperisone, methocarbamol, carisoprodol, and cyclobenzaprine, may be prescribed to control postoperative muscle spasms, spasticity, stiffness, contracture.
- Calcium & vitamin D3 – To improve bone health, blood clotting, helping muscles to contract, regulating heart rhythms, nerve functions, and healing fractures. As a general rule, too absorbed more minerals for men and women age 50 and older should consume 1,200 milligrams of calcium a day, and 600 international units of vitamin D a day to heal back pain, fractures, osteoarthritis.
- Neuropathic Agents – Drugs(pregabalin & gabapentin) that address neuropathic—or nerve-related—pain. This includes burning, numbness, tingling sensation, and paresthesia.
- Glucosamine & Diacerein, Chondroitin sulfate – can be used to tighten the loose tendon, cartilage, ligament, and cartilage, ligament regenerates cartilage or inhabits the further degeneration of cartilage, ligament. The dosage of glucosamine is 15oo mg per day in divided dosage and chondroitin sulfate approximately 500mg per day in different dosages, and diacerein minimum of 50 mg per day may be taken if the patient suffers from osteoarthritis, rheumatoid arthritis, and any degenerative joint disease.[rx]
- Topical Medications and essential oil – These prescription-strength creams, gels, ointments, patches, and sprays help relieve pain and inflammation in acute trauma, pain, swelling, tenderness through the skin. If the fracture is closed and not open fracture then you can use this item.
- Antidepressants – A drug that blocks pain messages from your brain and boosts the effects of endorphins in your body’s natural painkillers. It also helps in neuropathic pain, anxiety, tension, and proper sleep.
- Corticosteroids – Also known as oral steroids, these medications reduce inflammation. To heal the nerve inflammation and clotted blood in the joints.
- Dietary supplement – To eradicate the healing process from fracture your body needs a huge amount of vitamin C, and vitamin E. From your dietary supplement, you can get it, and also need to remove general weaknesses & improved health.
- Cough Syrup – If your doctor finds any chest congestion or fracture-related injury in your chest, dyspnoea, post-surgical breathing problem, then advice you to take bronchodilator cough syrup.
What To Eat and What to avoid
Eat Nutritiously During Your Recovery
All bones and tissues in the body need certain micronutrients in order to heal properly and in a timely manner. Eating a nutritious and balanced diet that includes lots of minerals and vitamins is proven to help heal broken bones and all types of fractures. Therefore, focus on eating lots of fresh food produce (fruits and veggies), whole grains, cereal, beans, lean meats, seafood, and fish to give your body the building blocks needed to properly repair your fracture. In addition, drink plenty of purified mineral water, milk, and other dairy-based beverages to augment what you eat.
- Broken bones or fractures bones need ample minerals (calcium, phosphorus, magnesium, boron, selenium, omega-3) and protein to become strong and healthy again.
- Excellent sources of minerals/protein include dairy products, tofu, beans, broccoli, nuts and seeds, sardines, sea fish, and salmon.
- Important vitamins that are needed for bone healing include vitamin C (needed to make collagen that your body essential element), vitamin D (crucial for mineral absorption, or machine for mineral absorber from your food), and vitamin K (binds calcium to bones and triggers more quickly collagen formation).
- Conversely, don’t consume food or drink that is known to impair bone/tissue healing, such as alcoholic beverages, sodas, fried fast food, most fast food items, and foods made with lots of refined sugars and preservatives.
Surgery
- Closed reduction and splinting – The clinician are able to do the closed reduction by extension and axial compression on the proximal phalanx with relocating pressure over the phalangeal base to glide it into position. This approach is different than the traction technique utilized in PIP joint dislocation. Multiple reduction attempts should be avoided because the inability to scale back may indicate volar plate interposition requiring open reduction. Multiple attempts at MCP joint dislocation reduction have the potential complication of displacing the volar plate between articular surfaces, lumbricals, or flexor tendons. The finger should need to splint with the wrist extended 30 degrees and MCP joint in 30 to six 0 degrees of slight flexion to stop terminal extension for about 3 to 6 weeks, followed by a further fortnight of buddy taping.
- Operative intervention – is indicated for nonreducible MCP joint dislocation as there’s a high likelihood of volar plate involvement in these cases. Open reduction of MCP joint dislocation is often performed using either a dorsal or volar approach; however, the dorsal approach is preferable because it carries a lower risk of neurovascular injury. After surgery, the wrist is splinted in 30-degrees of extension with the MCP joint in slight flexion for 2 weeks to stop terminal extension. the advice is that the PIP and DIP joints not be immobilized. Recovery to pre-injury motion typically occurs between 4 to six weeks.[rx]
- PIP joint dislocations – also are manageable with operative and nonoperative options, but unlike MCP joint dislocations, practitioners must determine if the PIP joint dislocation is dorsal, volar, lateral, or rotary because the treatment may differ. For closed reduction of dorsal PIP joint dislocation, the practitioner should apply slight extension and longitudinal traction, and with the opposite hand, apply pressure to the dorsal aspect of the proximal phalanx to relocate the displaced digit. After reduction, the examiner should evaluate the joint for instability altogether planes and acquire radiographs. the traditional contour of the dorsal aspect of the PIP joint on lateral plain film is “C” shaped.
If, after reduction, this contour takes on a “V” shape, it’s going to indicate persistent dorsal subluxation, which may cause severe stiffness.[rx] PIP joint dislocation is usually stable after reduction and is treated by dorsal splinting in 30-degrees of flexion. Volar PIP dislocations are the smallest amount common, but the reduction of the volar PIP joint dislocation is usually successful. The reduction takes place by applying mild traction with the PIP and MCP joints held in slight flexion. After the reduction of the volar dislocation, apply an extension splint for 6 weeks. Unlike volar PIP joint dislocation, lateral dislocations are more likely to need operative intervention. Closed reduction requires relaxation of the extensor tendon and lateral bands by wrist extension and MCP flexion, respectively. Then the center phalanx is gently rotated back to position. If reduction of the lateral PIP joint dislocation provides a full range of motion without subluxation, then the joint isn’t grossly unstable. In these cases, splinting and reassessment in two or three weeks is suggested. All unstable dislocations require referral for orthopedic evaluation and possible open repair. Indications for operative intervention regarding PIP joint dislocation include joint instability, significant ligament, soft tissue or tendon injury, or dislocations that aren’t reducible.
Splinting remains the mainstay of emergency treatment post-reduction. A recent randomized control trial compared buddy taping versus aluminum orthosis treatment of Eaton grades I and II hyperextension type injuries and located no difference in strength, pain, or function at three weeks. However, buddy tape did show an earlier range of motion and decreased edema.[11]
DIP joint dislocation management is a smaller amount complex than PIP joint dislocation. The three sorts of DIP joint dislocation are dorsal, volar, and lateral. the foremost common sort of DIP joint dislocation is dorsal. Dorsal DIP joint dislocation is reduced with longitudinal traction, relocating dorsal pressure on the distal phalanx with DIP joint in flexion. Often, the reduction occurs easily within the ER setting, followed by splinting of DIP in 10 to 20-degree flexion for 2 to 3 weeks.[4] If there’s persistent DIP joint instability, like those found more commonly in lateral dislocation, then it’s treated with four to 6 weeks of K-wire fixation after concentric reduction. Irreversible dislocation is usually thanks to volar plate interposition and requires surgical intervention.
Complications
- Chronic stiffness is common after DIP dislocation treatment.
- Overtreatment, like prolonged splinting and multiple attempts of reduction of volar PIP joint dislocations, increases the likelihood of volar plate scarring and flexion contractures.
- Chronic pain
- Reduced mobility of MCP, PIP, and DIP joints.
- Missing or delayed volar plate injuries are related to boutonniere deformity, swan neck deformity, laxity, and contractures.
- Swan neck deformity, PIP flexion contracture, mallet finger deformity can also occur if the dislocations of the finger are chronically unrecognized
References
