{"id":5423,"date":"2011-07-14T20:26:25","date_gmt":"2011-07-14T20:26:25","guid":{"rendered":"http:\/\/crashtext.org\/misc\/5423.htm\/"},"modified":"2013-09-16T19:19:18","modified_gmt":"2013-09-16T23:19:18","slug":"ankle-foot","status":"publish","type":"post","link":"https:\/\/crashingpatient.com\/trauma\/orthopedics\/ankle-foot.htm\/","title":{"rendered":"Ankle and Foot"},"content":{"rendered":"

<\/span>Exam of the Ankle<\/span><\/h2>\n

Anterior Drawer:\u00a0 2mm of subluxation or dimpling of the anterior skin<\/p>\n

Talar Tilt:\u00a0 Tests ATFL and calcaneofibular ligaments.\u00a0 Use same position as ant drawer (foot neutral, knee flexed 90) Force inversion of the foot, test is positive if there is joint instability.\u00a0 Eversion can be used to test the deltoid<\/p>\n

Fibular compression:\u00a0 Assesses the integrity of the tibiofibular syndesmotic ligament.\u00a0 Pain felt at the ankle when squeezing the tibia and fibula 6-8 inches below the knee.<\/p>\n

Thompson’s test: pt prone and foot hanging off the edge of the bed or knee flexed. The patient should lie prone on the examination table. The calf should be gently squeezed by the physician, who watches for plantar flexion in the patient’s foot. If the foot moves, the tendon is presumed to be at least partially intact. No movement is indicative of rupture, and the test results are considered abnormal. If the Thompson test is equivocal, a sphygmomanometer should be placed on the patient’s calf and inflated to 100 mm Hg. The affected foot should be dorsiflexed. The pressure will rise to approximately 140 mm Hg if the tendon is intact. In a patient with an Achilles rupture, only a flicker of movement on the pressure gauge is discernible with dorsiflexion. If the diagnosis is still unclear, an MRI may be helpful.<\/p>\n

<\/span>Movement of the ankle<\/span><\/h3>\n

Eversion-Lift pinky off ground, keep big toe down<\/p>\n

Inversion-Lift big toe off ground, keep little toe down<\/p>\n

Abduction-Rotate Foot out<\/p>\n

Adduction-rotate foot in<\/p>\n

Suppination-adduction + inversion<\/p>\n

Pronation-abduction + eversion<\/p>\n

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Ankle is a ring made up of tibia, tibiofibular ligament, lateral ligaments, calcaneus, and deltoid<\/p>\n

Dislocations<\/p>\n

Medial and posterior are the most common.<\/p>\n

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<\/span>Fractures<\/span><\/h3>\n

Ankle Series:\u00a0 AP, LAT, Mortise (AP c leg internally rotated, Medial space must be <4mm)<\/p>\n

Ottawa Ankle Rules<\/h4>\n

(Ann Emed Med 21:384-390, 1992)<\/p>\n

Get ankle films if malleolar pain and any of:<\/p>\n

1.\u00a0\u00a0\u00a0\u00a0\u00a0 Tender on posterior edge, tip, or distal 6 cm of lat or medial malleolus<\/p>\n

2.\u00a0\u00a0\u00a0\u00a0 Unable to complete 4 steps (2 on bad ankle), now and at scene<\/p>\n

Get Foot films as well if midfoot pain and any of:<\/p>\n

1.\u00a0\u00a0\u00a0\u00a0\u00a0 Navicular Tenderness<\/p>\n

2.\u00a0\u00a0\u00a0\u00a0 Base of 5th MC tenderness<\/p>\n

3.\u00a0\u00a0\u00a0\u00a0 Can not complete 4 steps<\/p>\n

Validated in Kiddies (J Accid Emerg Med 16:342)<\/p>\n

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Bernese Ankle Rules<\/h4>\n

(J Trauma 2005;59(5):1268)<\/p>\n

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Indirect Fibular Stress The malleolar fork is compressed approximately 10 cm proximally to the fibular tip, avoiding direct palpation of the injured region (Fig. 1). The compression is executed using the flat of the hand to spread the applied force on a larger area. Direct Medial Malleolar Stress The thumb is pressed flatly on the medial malleolus (Fig. 2). Direct palpation using the tip of the thumb is avoided. Compression Stress of the Mid- and Hindfoot One hand fixes the calcaneus in neutral position and the other hand applies a sagittal load on the forefoot, so that the mid- and hindfoot are compressed (Fig. 3). If any of these clinical examinations caused pain, the diagnosis was acute fracture. If there was no pain during the examination, the diagnosis was no sign for acute fracture.<\/p>\n

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<\/span>Overlooked Injuries<\/span><\/h3>\n

1) fractures of the os trigonum-The os trigonum is an accessory bone (sesamoid) located posterior to the posterior tubercle of the talus. It is present in 5-14% of the population and is frequently unilateral. This accessory bone may be fused to the talus, calcaneus, or both. Patients with a fracture of the os trigonum often give a history of having sustained an ankle sprain weeks to months earlier, at which time radiographs were interpreted as normal. They give a history of persistent posterior and posterolateral ankle pain, swelling, and giving way of the ankle. All had a 25\u00b0 decrease in plantar flexion of the ankle and pain to palpation posterior to the tibia but anterior to the Achilles tendon. The pain was enhanced by forced plantar flexion of the ankle or resisted plantar flexion of the great toe.<\/p>\n

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2) Achilles tendon injuries-Physicians miss injuries to the Achilles tendon in 25% of cases, most often due to preservation of foot plantar flexion by the posterior tibial, peroneal, and toe flexor muscles? Patients will often describe the sensation of being kicked or \u0093shot\u0094 in the back of the ankle with an immediately ensuing intense pain. Physicians should look for a palpable gap in the tendon and a positive Thompson test, since these are readily apparent in patients with complete rupture. With the patient in a prone position, instruct the patient to flex his knee. When the calf muscles are squeezed against the tibia and fibula, mechanical contraction of the gastrocnemius and soleus muscles occurs. If the Achilles tendon is ruptured, then contraction of the calf muscles will not plantar flex the foot. Incomplete ruptures may present greater diagnostic difficulties. In patients with these injuries, posteriorly located pain, swelling, and ecchymosis may be the only clue.<\/p>\n

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3) dislocating peroneal tendons-Like Achilles tendon injuries, damage to the peroneal tendons is easy to overlook. Unfortunately, this can result in tendon instability and chronic subluxation or actual dislocation of the tendons. This injury involves the peroneal tendons where they pass behind and beneath the lateral malleolus. With sudden, forceful dorsiflexion and eversion of the ankle and the simultaneous, forceful contraction of the peroneal muscles, the peroneal retinaculum is torn and the tendons dislocate anteriorly to a position where they overlie the lateral malleolus. Patients with this type of injury usually present with Posterolateral or retromalleolar swelling, ecchymosis, and tenderness. This is in contrast with most lateral ligament injuries in which these signs occur anterior or inferior to the lateral malleolus. In addition, plantar flexion, eversion, and dorsiflexion against resistance increase the patient\u0092s pain in this area and may reproduce the injury in those patients in whom dislocation with spontaneous relocation occurs. Therapy for peroneal tendon subluxation or dislocation is controversial. Casting appears to work best in patients who are not seriously injured in athletics. But in very athletic patients and those who have associated avulsion fractures, operative repair prevents ankle instability, recurrent dislocation, and chronic pain.<\/p>\n

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4) fractures of the fifth metatarsal-Avulsion of the fifth metatarsal by the peroneus brevis tendon is an injury caused by virtually the same mechanism that causes ankle injuries. In the process of ankle inversion, the tendon, which loops under the lateral malleolus, is stretched and avulses its osseous attachment. These avulsion injuries are typically manifested by discrete tenderness over the fifth metatarsal head in association with local swelling.<\/p>\n

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5) Transchondral talar-dome fractures-occur with inversion and eversion injuries of the ankle but frequently are not diagnosed when the injury occurs because the radiographs do not show the fracture. The injury causes a compression fracture of the articular surface of the talus and secondary changes in the subchondral bone that may not be radiographically evident for many weeks. Although the acute pain and generalized swelling associated with the injury resolve in 2-3 weeks, the patient experiences persistent stiffness. intermittent joint pain, instability, or catching or locking of the ankle. If the patient returns for evaluation six weeks or more after the initial injury, x-rays may reveal a fracture of the talar dome.<\/p>\n

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6) ankle diastasis-Finally, diastasis of the ankle at the distal tibiofibular joint can occur without fracture. This may result from complete or partial disruption of the ligament complex that forms the tibiofibular syndesmosis. Usually, the interosseous ligament is injured, often in combination with either the ATFL, deltoid ligament, or both. In an injury at the tibiofibular syndesmosis, an oblique x-ray is most informative; look for widening of the syndesmosis beyond the normal 1-2 mm.<\/p>\n

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7) Fracture of the anterior process of the calcaneus from avulsion of the bifurcate ligament<\/p>\n

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8) Fracture from avulsion of the extensor digitorum brevis<\/p>\n

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Snowboarding is associated with fractures of the lateral process of the talus.\u00a0 These fractures can be missed.\u00a0 They require casting and ortho f\/u.\u00a0 Plain films will be negative up to 40% of the time, therefore CT scan is the proper eval if this injury is suspected.\u00a0 (Annals EM 2003; 41:854-858)<\/p>\n

<\/span>Soft Tissue<\/span><\/h3>\n

Weakest parts of ankle capsule is the ant\/post<\/p>\n

Lateral is the most commonly injured-<\/p>\n

Ant. Talofibular 1st ruptured (most common)<\/p>\n

Calcaneofibular 2nd ruptured<\/p>\n

Post Talofibular is 3rd ruptured usually c inversion stress<\/p>\n

Medial is deltoid ligament<\/p>\n

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1st \u00ba sprain gives mild pn, can bear weight, rx c RICE and ACE<\/p>\n

2nd swelling, pn, ? fx, pn on stress, give walking boot<\/p>\n

3rd Ant drawer is positive, egg shaped swelling, >1 ligament, may need surgery. Post splint<\/p>\n

TREATMENT OF ANKLE SPRAINS<\/h4>\n

A multicentre randomised controlled UK trial which investigated treatment for patients with severe ankle sprains makes interesting reading. The authors conclude that there is a role for an early period of ten days\u0092 immobilisation in a below knee cast for some patients with ankle sprains. Unfortunately, the study compared various forms of immobilisation against a compression bandage, yet the latter does not appear to still be in widespread use. The study did confirm the long recovery period associated with severe ankle sprains, injuries which have perhaps traditionally been regarded as relatively minor and self-limiting (Lancet<\/em> 2009; 373:<\/strong> 575-81).<\/p>\n

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Inject Joint Capsule opposite injury c 5-10 cc Lidocaine<\/p>\n

Talar Stress test to inversion and eversion<\/p>\n

Ant Drawer- ankle at 90 to leg, knee slightly flexed.\u00a0 One hand on base of tibia, other cups heel, pull anterior<\/p>\n

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Chondral Fractures-talar dome fx, refer to avoid arthritis<\/p>\n

<\/span>Foot Fractures<\/span><\/h3>\n

Calcaneus<\/p>\n

pn c hyperextension, get calcaneal and ankle films, consider CT<\/p>\n

Rx c Rice and Bulky jones.\u00a0 Watch for compartment of the foot<\/p>\n

Talus<\/p>\n

Cast, consult, consider CT<\/p>\n

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<\/span>Midfoot<\/span><\/h3>\n

Navicular<\/p>\n

AP\/Lat\/Oblique<\/p>\n

Chip fx can just get an ace<\/p>\n

Tuberosity or Body needs Cast<\/p>\n

Cuboid or Cuneiform<\/p>\n

Needs casting<\/p>\n

Lisfranc<\/p>\n

Medial aspect of middle cuneiform should always be in line c 2nd MT, if not dislocation<\/p>\n

Fx of base of 2nd MT equals further joint disruption somewhere<\/p>\n

Ortho Consult<\/p>\n

Metatarsal Fxs<\/p>\n

Document DP function<\/p>\n

AP\/Lat\/Oblique<\/p>\n

ACE, RICE, Refer for possible Casting<\/p>\n

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<\/span>Jones Fractures<\/span><\/h3>\n

Jones\/Pseudo-Jones\/Avulsion<\/p>\n

5th MT avulsion fx is on proximal 1.5 cm of MT, bulky jones<\/p>\n

Jones is distal to prox 1.5 cm through tuberosity<\/p>\n

Pseudojones-through shaft, distal to tuberosity<\/p>\n

\"\"<\/a>\"\"<\/a>\"\"<\/a>\"\"<\/a>\"\"<\/a><\/p>\n

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Jones Review<\/a><\/p>\n

<\/span>Phalyngeal<\/span><\/h3>\n

AP\/Lat\/Obl<\/p>\n

2-5th-buddy tape 2-3 weeks<\/p>\n

Reduce if dislocated<\/p>\n

If Sub-ungal hematoma >50%, remove the nail<\/p>\n

1st:\u00a0 if comminuted, cast<\/p>\n

<\/span>Soft Tissue<\/span><\/h3>\n

Foot Punctures<\/h4>\n

Film<\/p>\n

Can get rubber foreign bodies from punctures through shoes in addition to pseudomonal infections (Foot Ankle Internat 22(5):409, May 2001)<\/p>\n

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Athlete\u0092s Foot<\/h4>\n

Griseofulvin 500-1000mg po OD or Lamisil<\/p>\n

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Foot:<\/p>\n

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FOOT<\/strong> Adequate imaging of the foot includes an AP, oblique, and lateral view.\u00a0 In addition to looking for cortical disruptions, examining alignments and measuring angles are essential in detecting subtle pathology.\u00a0 On the AP view, the lateral aspects of the first metatarsal and the first cuneiform should align, as should the medial aspects of the second metatarsal and the second cuneiform (Figure 27).\u00a0 On the oblique view, the medial aspects of the third metatarsal and third cuneiform should align (Figure 28).\u00a0 On the lateral view, Bohler\u0092s angle is generated by a line bordering the superior aspect of the posterior calcaneal tuberosity intersecting a line connecting the superior talar articular surface with the superior aspect of the anterior calcaneal process.\u00a0 This angle measures 20 to 40 degrees normally (Figure 29).Figure 27.\u00a0 AP radiograph and diagram of right foot<\/strong> \"\"<\/a>\u00a0 \"\"<\/a> Figure 28.\u00a0 Oblique radiograph and diagram of right foot<\/strong> \"\"<\/a>\u00a0 \"\"<\/a> Figure 29.\u00a0 Lateral radiograph and diagram of right foot<\/strong><\/p>\n

\"\"<\/a>\u00a0 \"\"<\/a><\/p>\n

The primary high-risk \u0093D\u0094islocation injury of the foot is a LisFranc injury.\u00a0 This tarsal-metatarsal fracture\/ dislocation injury is initially missed 20% of the time (26).\u00a0\u00a0 The strongest part of the LisFranc ligament tethers the second metatarsal base to the distal first cuneiform.\u00a0 This ligament thus provides stability to the tarsal-metatarsal junction.\u00a0 A LisFranc injury is best viewed on the AP radiograph showing a break of the second metatarsal or Lisfranc ligament alone with a subsequent dislocation of the second through fifth metatarsals (Figure 30).\u00a0 Radiographically, this tarsal-metatarsal dislocation is present when the second metatarsal no longer aligns with the second cuneiform on the AP view and\/or when the third metatarsal no longer aligns with the third cuneiform on the oblique view.\u00a0 It is important to realize that despite normal alignment of the tarsal-metatarsal junction, a fracture of the second metatarsal base alone at the Lisfranc ligament insertion site implies a Lisfranc injury because the second and fifth metatarsals are no longer tethered to the midfoot.\u00a0 Because a LisFranc injury is associated with compartment syndrome and often requires surgical repair, carefully scrutiny for this injury pattern is critical.Figure 30.\u00a0 Lisfranc injury of right foot (AP view)<\/strong> \"\"<\/a> \"\"<\/a> Further images and discussion of a LisFranc injury may be found in the EMedHome.com archives for the clinical case discussing this injury.\u00a0 Two \u0093O\u0094ccult fractures of the foot include the calcaneus and talus fractures.\u00a0 First, a calcaneus fracture is the most commonly fractured tarsal bone and had the third highest \u0093miss rate\u0094 for fractures in the study by Freed and Shields at a rate of 10% (10).\u00a0 Commonly this fracture occurs after a patient falls from a height onto his or her heel.\u00a0 Radiographic findings include a cortical break, and a Bohler\u0092s angle of less than 20 degrees suggests an impaction fracture (Figure 31).\u00a0 Calcaneal fractures frequently require CT imaging to further assess the severity of bony fragmentation.<\/p>\n

Figure 31.\u00a0 Calcaneus fracture (Lateral view)<\/strong><\/p>\n

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The second \u0093O\u0094ccult fracture, a talus fracture, ranks as the second most commonly fractured tarsal bone.\u00a0 Anatomically, the talar neck is the site of the majority of these fractures (Figure 32).\u00a0 By mechanism of excessive dorsiflexion of the ankle, this injury often occurs in automobile drivers aggressively stepping on the brakes in a motor vehicle crash and in snowboarders.\u00a0 Radiographically, cortical breaks can be extremely subtle but crucial to detect.\u00a0 This applies especially to talar neck fractures because of the risks of avascular necrosis, subchondral collapse, and degenerative arthritis.Figure 32.\u00a0 Talus neck fracture (Lateral view)<\/strong><\/p>\n

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And finding only \u0093H\u0094alf of the injuries in the foot is relevant to calcaneal fractures.\u00a0 Because they often occur from axial loading of the calcaneus, other axial structures of the body such as the vertebral spine are prone to fractures.\u00a0 Specifically, thoracolumbar fractures occur in 10% of patients with calcaneal fractures (Figure 33).\u00a0 Remembering to perform a careful physical and radiographic examination of the back will help you avoid the common pitfall of overlooking a thoracolumbar fracture with potential neurological compromise.Figure 33.\u00a0 L3 vertebral burst fracture (Lateral view) \"\"<\/a> \"\"<\/a> SUMMARY<\/strong>Orthopedic injuries, such as fractures and dislocations, are easily missed radiographically and are the source of much litigation in the ED.\u00a0 As an EP, it is important to be aware that plain films are notoriously poor in identifying fractures, especially of the scaphoid, radial head, femoral neck, and tibial plateau.\u00a0 Further imaging and\/ or a more expedited follow-up with an orthopedist is essential in these cases.\u00a0 Also, being vigilant of high-risk but low-visibility injuries on plain radiographs will help reduce misinterpretation errors.\u00a0 The mnemonic \u0093DOH\u0094 can be used to supplement the EP\u0092s current approach to reading radiographs by asking the following questions:\u00a0 Did I miss a \u0093D\u0094islocation?\u00a0 Did I miss a frequently-overlooked \u0093O\u0094ccult fracture?\u00a0 And lastly, did I identify only \u0093H\u0094alf of the injuries currently present?<\/p>\n

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Calcaneocuboid Dislocation<\/strong>The Emergency Physician did not appreciate the dislocation of the cuboid bone from the calcaneus.\u00a0 On the lateral view, and when compared to a normal foot, the injury becomes apparent:<\/p>\n

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The cuboid bone (black arrow on the left) does not articulate with the calcaneus (black arrow on the right). On a lateral view of an uninjured foot (image on right), it is clear that the two articular surfaces are appropriately aligned (black arrows).<\/p>\n

The patient underwent successful closed reduction of the dislocation under general anesthesia the day after ED evaluation. Midfoot dislocations are an uncommon injury; this case illustrates that a careful search of the tarsal bone relationships is indicated in patients with significant foot and ankle injury without visible fractures. The prognosis is excellent for most midfoot dislocations, as long as they are recognized and treated early.<\/p>\n

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<\/span>Treatment of Ankle Sprains<\/span><\/h3>\n

Am J Sports Med. 2006 Sep;34(9):1401-12. Epub 2006 Jun 26. Related Articles, Links A prospective, randomized clinical investigation of the treatment of first-time ankle sprains. Beynnon BD, Renstrom PA, Haugh L, Uh BS, Barker H. Department of Orthopaedics & Rehabilitation, McClure Musculoskeletal Research Center, University of Vermont, Burlington, VT 05405-0084, USA. bruce.beynnon@uvm.edu BACKGROUND: Acute ankle ligament sprains are treated with the use of controlled mobilization with protection provided by external support (eg, functional treatment); however, there is little information regarding the best type of external support to use. HYPOTHESIS: There is no difference between elastic wrapping, bracing, bracing combined with elastic wrapping, and casting for treatment of acute, first-time ankle ligament sprains in terms of the time a patient requires to return to normal function. STUDY DESIGN: Randomized controlled clinical trial; Level of evidence, 1. METHODS: Patients suffering their first ligament injury were stratified by the severity of the sprain (grades I, II, or III) and then randomized to undergo functional treatment with different types of external supports. The patients completed daily logs until they returned to normal function and were followed up at 6 months. RESULTS: Treatment of grade I sprains with the Air-Stirrup brace combined with an elastic wrap returned subjects to normal walking and stair climbing in half the time required for those treated with the Air-Stirrup brace alone and in half the time required for those treated with an elastic wrap alone. Treatment of grade II sprains with the Air-Stirrup brace combined with the elastic wrap allowed patients to return to normal walking and stair climbing in the shortest time interval. Treatment of grade III sprains with the Air-Stirrup brace or a walking cast for 10 days followed by bracing returned subjects to normal walking and stair climbing in the same time intervals. The 6-month follow-up of each sprain severity group revealed no difference between the treatments for frequency of reinjury, ankle motion, and function. CONCLUSION: Treatment of first-time grade I and II ankle ligament sprains with the Air-Stirrup brace combined with an elastic wrap provides earlier return to preinjury function compared to use of the Air-Stirrup brace alone, an elastic wrap alone, or a walking cast for 10 days.<\/p>\n

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<\/span>Intra-articular block for fracture dislocation<\/span><\/h2>\n

White BJ, et al. Intra-articular block compared with conscious sedation for closed reduction of ankle fracture-dislocations. A prospective randomized trial. J Bone Joint Surg Am. 2008 Apr;90(4):731-4. Ankle fracture-dislocations require urgent reduction to protect the soft tissues, to minimize articular injury, and to allow swelling to decrease. Conscious sedation is commonly used to provide analgesia for closed reduction of this injury. We hypothesized that an intra-articular block of the ankle would provide similar analgesia and the ability to reduce the ankle with a lower risk than conscious sedation. METHODS: Between September 2005 and January 2007, forty-two patients with an ankle fracture-dislocation presented to our emergency department and were enrolled in a prospective randomized study. The patients were given either conscious sedation or an intra-articular lidocaine block for the reduction and for the application of a plaster splint. After the reduction maneuver, the patients used a visual analog pain scale to rate the level of pain before, during, and after the procedure, from 1 (no pain) to 10 (severe pain). The senior authors reviewed the injury and reduction radiographs to confirm the reduction of the ankle joint. RESULTS: Twenty-one patients were randomized to each group. There was no difference in demographic data or fracture patterns between the groups. Both the sedation and the block reduced the pain to a similar degree. The pain reduction (the initial pain level minus the level of pain after medication was given or injected) was an average (and standard deviation) of 4.6 +\/- 3.3 for the block group and 4.2 +\/- 3.5 for the sedation group (p = 0.64). The average change in the level of pain between the initial presentation and during the reduction was 3.6 +\/- 3.8 for the block group and 4.1 +\/- 3.3 for the sedation group. Overall, there was no difference in analgesia provided by these two methods (p = 0.71). An acceptable reduction was achieved for forty-one of the forty-two patients with one failure in the sedation group. The average time for ankle reduction and stabilization in a splint was 81.5 minutes for the sedation group and 63.8 minutes for the block group. CONCLUSIONS: Compared with conscious sedation, an intra-articular lidocaine block provides a similar degree of analgesia and sufficient analgesia to achieve closed reduction of ankle fracture-dislocations.<\/p>\n

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<\/span>\u00a0Plantar Fasciitis<\/span><\/h2>\n

This PT guy who said the BEST treatment was to find a staircase,\u00a0 place ball-of-foot\/feet on edge of stair and allow the heel to sink, stretching the tendons.\u00a0 Do this multiple times per day – every chance I got.<\/span><\/span><\/p>\n

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<\/span>Assessing for Ankle Joint Penetration<\/span><\/h2>\n

How to Confirm Ankle Joint Penetration<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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