continuing professional development By reading this article and writing a practice profile, you can gain a certificate of learning. You have up to a year to send in your practice profile. Guidelines on how to write and submit a profile are featured at the end of this article. Assessment of acute foot and ankle sprains EN623 Lynam L (2006) Assessment and management of acute foot and ankle sprains. Emergency Nurse. 14, 4, 24-33. Date of acceptance: June 2006 Authors Louise Lynam ANP(Emergency), RGN, HDEN, MSc is an advanced nurse practitioner in emergency care at the Adelaide and Meath Hospital, Dublin Summary Acute ankle and foot trauma is a regular emergency presentation and prompt strategic assessment skills are required to enable nurses to categorise and prioritise these injuries appropriately. This article provides background information on the anatomy and physiology of the lower limb to help nurses to identify various grades of ankle sprain as well as injuries that are limb threatening Key words n Patient assessment n Anatomy and physiology n Foot care and disorders These key words are based on subject headings from the British Nursing Index. Online For related articles visit our online archive at: www.emergencynursing.co.uk and search using the key words above. This article has been subjected to double blind peer review 24 EN1404 24-34 CPDLnm623.indd 24 Aims and intended outcomes This article aims to provide nurses, specific ally those who work in emergency and minor injury units, with a logical approach to assessing acute foot and ankle injuries. It discusses the anatomy and physiology of the foot and ankle, common mechanisms of injury and relevant diagnostic techniques. Initial emergency treatment is mentioned but the article does not cover specific man agement of foot and ankle trauma. On completing this article, the reader should be able to: n Illustrate the normal anatomy of the foot and ankle n Understand injury mechanisms and their possible outcomes n Discuss the assessment progression from history taking and physical examination, to diagnosing common foot and ankle injuries n Recognise the potential complications assoc iated with injuries to the foot and ankle. Introduction The ankle is the most common site of acute musculoskeletal injuries (Barker et al 1997), and injuries to the foot and ankle are the most common injuries seen in emergency departments (EDs) (Stiell et al 1992), with acute ankle sprains accounting for 10 per cent of all visits (Garrick 1997). Sprains have been shown to be 2.4 times more common in the dominant leg and have a 73.5 per cent prevalence of recur rence (Yeung et al 1994). Their misman agement can lead to chronic and persist ent conditions (Kesson and Atkins 1998). The vast majority of ankle injuries involve one or more of the lateral support ing ligaments and can usually be man aged successfully in primary care settings (Garrick and Schelkun 1997). During sport, the ankle is subjected to considerable compression forces. These have been calculated as five times body weight during walking and 13 times body weight during running (Bennet 1994). Moreover, because the foot is regularly in contact with the ground, compression forces may be repeated 5,000 times every hour when running. Common injuries seen in EDs range from foot and ankle sprains to tendon ruptures, foot and ankle fractures, and dislocations. To reduce treatment costs and increase patient recovery, nurses should use research evidence when managing and treating these injuries (Smith 2003). Detailed history taking and examination, with reference to underlying anatomic structures, can help nurses recognise potential limb threatening injuries. TIME OUT 1 Reflecting on your own practice, consider the number of patients you have seen with acute ankle or foot trauma. How did they present? How did you decide on an appropriate triage category in each case? You might wish to write down some of the presentations and what led you to your decisions. emergency nurse vol 14 no 4 july 2006 10/7/06 4:36:46 pm TIME OUT 2 Fig. 1. Bones of the foot and ankle Tibia Fibula Calcaneus Navicular bone Cuboid bone Middle cuneiform Lateral cuneiform Refer to Fig. 1. Ask a colleague to help you identify the bones of the foot and ankle on the diagram and then refer their position to your own lower limb. This is called identifying surface anatomy. The collateral ligaments on each side of the ankle are roughly triangular in their attachment, and they link with the talus and calcaneus, or heel bone. The medial collateral, or deltoid, ligament actually consists of four ligaments, forming a strong triangular band radiating from the medial malleolus and talus to the navicular bone on the foot (Fig. 2). Because this liga ment offers such strong support, traumatic injuries cause ankle fractures more often than ligament ruptures (Kannus and Ren strom 1991). The lateral collateral ligament consists of three separate ligaments, the names of which suggest their bony attachment (Fig. 3): n The anterior talofibular ligament (ATFL) is an integral part of the ankle capsule. The weakest of all the lateral collateral lig aments, it arises from the tip of the lateral malleolus and passes across the talus n The calcaneofibular ligament (CFL) is a narrow cord, separate from the capsule, that arises from the lateral malleolus and attaches to the calcaneus n T he posterior talofibular ligament (PTFL) is a strong band that arises from the back of the lateral malleolus and vol 14 no 4 july 2006 emergency nurse EN1404 24-34 CPDLnm623.indd 25 Talus Medial cuneiform Metatarsal bones Sesamoid bones Proximal phalanges Distal phalanges Middle phalanges Fig. 2. Medial collateral ligaments of the ankle Four ligaments comprsing the medial collateral, or deltoid, ligament Peter Gardiner The ankle The ankle joint (Fig. 1) is uniaxial, in that movement occurs in one plane. It is located between the lower, or distal, ends of the tibia and fibula, which form the mortise, and the talus bone, which lies underneath (Kesson and Atkins 1998). The talus fits into the mortise to form a hinge joint, with the tibia forming the medial malleolus, which is nearest the midline, and the fibula forming the lat eral malleolus, which is furthest away from the midline. The joint surfaces are covered with hyaline cartilage, surrounded by a fibrous capsule lined with synovium and reinforced by strong ligaments. 25 10/7/06 4:36:48 pm continuing professional development Fig. 3. Ligaments and tendons of the foot and ankle Calcaneal (Achilles) tendon Anterior tibiofibular ligament Anterior talofibular ligament (ATFL) Interosseous talcalcaneal ligament Calcaneonavicular and calcaneocuboid ligaments Dorsal cuboideonavicular ligament Dorsal cuneonavicular ligaments Dorsal intercuneiform ligament Dorsal tarsometatarsal ligaments Superior peroneal retinaculum Calcaneofibular ligament (CFL) Inferior peroneal retinaculum Dorsal cuneocuboid ligament Dorsal calcaneocuboid ligament Peroneus longus and brevis tendons attaches to the back of the talus (Kes son and Atkins 1998). The interosseous ligament, which connects the tibia and fibula proximally and the tibiofibular syndesmosis distally is another important ankle ligament. TIME OUT 3 Understanding anatomy is essential for accurate assessment and diagnosis of ankle and foot injuries. List the names of any of the ligaments around the foot and ankle you can recall. Remember that their names evolve from their bony attachments. The foot The foot consists of 26 bones and 57 joints, which together act as a rigid structure for weightbearing. The foot helps to support the body and control posture by maintain ing the centre of gravity (Miller 1996). It is divided into the hindfoot, the midfoot and the forefoot. Fig. 4. Arterial supply to the foot and ankle The hindfoot The hindfoot, which is composed of three joints, links the midfoot to the ankle. The calcaneus, which joins the talus to form the subtalar joint, is the largest bone in the foot and enables the foot to rotate at the ankle. The calcaneus is cushioned by a layer of fat. Anterior tibia artery The midfoot Peroneal artery Posterior tibia artery Medial maleolus Dorsal pedis artery Posterior tibial pulse The midfoot has five irregularly shaped tarsal bones: the navicular bone, the cuboid bone, and the lateral, middle and medial cuneiform bones. Connected to the forefoot and hindfoot by muscles and the plantar fascia, or arch ligament, these form the foot’s arch and serve as a shock absorber. The forefoot Lateral plantar artery Medial plantar artery 26 EN1404 24-34 CPDLnm623.indd 26 The forefoot is composed of five toes, or phalanges, and their connecting long bones, or metatarsals. Each toe, or pha lanx, is made up of several small bones. The big toe, or hallux, has two phalanges, two interphalangeal joints and two tiny, round sesamoid bones, which enable it to move up and down. Each of the other four toes has three bones and two joints. emergency nurse vol 14 no 4 july 2006 10/7/06 4:36:50 pm The phalanges are connected to the metatarsals by five metatarsal phalangeal joints at the ball of the foot, which bears half the body’s weight. The tendons of the peroneus muscle pass distally to the lateral malleolus, with the peroneus brevis inserting at the base of the fifth metatarsal and the peroneus longus inserting at the under, or plantar, surface of the foot. TIME OUT 4 What mechanisms of injury can you name? Make a list of the possible injuries, sprains, tendon ruptures, fractures or dislocations that can occur from the mechanisms you have listed. Arterial supply Blood to the foot and ankle is supplied by the femoral artery, which becomes the pop liteal artery on entering the popliteal fossa, and divides into the anterior and posterior tibial arteries below the knee joint. The anterior tibial artery enters and supp lies the anterior compartment of the leg by passing between the tibia and fibula above the interosseous membrane. It continues to the dorsum of the foot as the dorsalis pedis artery, and enters the sole of the foot by passing between the first and second metatarsals. The posterior tibial artery continues through the calf between the soleus and deeper muscles, and enters the lateral compartment as the peroneal artery. It then enters the sole of the foot, and passes the medial and lateral plantar arteries, which anastomose with each other, as well as the dorsalis pedis artery to supply the anterior foot and toes (Fig. 4). Nerve supply to foot and ankle The tibial nerve passes through the pop liteal fossa, and branches off to form the gastrocnemius, popliteus, soleus and sural nerves. The sural nerve is joined by fibres from the common peroneal nerve, which runs down the calf and supplies the lateral aspect of the foot. Anteriorly, the common peroneal nerve leaves the popliteal fossa, crosses behind the head of the fibula and around the neck, and divides into deep and superficial branches (Fig. 5). vol 14 no 4 july 2006 emergency nurse EN1404 24-34 CPDLnm623.indd 27 The deep peroneal nerve supplies muscles of the anterior chamber, as well as cutane ous branches to the cleft between the big and second toe. The superficial peroneal nerve supplies the muscles in the lateral compartment, the skin over the anterior lower leg and the dorsum of the foot. History taking Taking patient history is an extremely important part of evaluating any lower limb injury, and doing so accurately gives vital clues to diagnosis. Questioning should reveal the mechanism of injury and the immediate signs and symptoms after an incident (Bruker and Khan 1998). Nurses should ask when, where, how, why, and what happened next, and note patients’ descriptions of the immediate symptoms after injury (Guly 1996). Fig. 5. Nerve supply to the foot and ankle Common peroneal nerve Superficial nerve, which supplies the lateral compartment Deep peroneal nerve, which supplies the anterior compartment 27 10/7/06 4:36:51 pm continuing professional development Fig. 6. Plantar flexion: the movement of the foot downwards questions include: was the injury on a sports field? Or a result of a road accident? Could a wound be contaminated with dirt or oil? Was the patient trapped for a time? Could they have hypothermia or be in shock? How and why? Tom Walsh Fig. 7. Dorsiflexion: the movement of the foot upwards When? The time of incident can help identify an injury’s level of severity. A patient who seeks help immediately, and is nonweightbearing, is more likely to have a severe injury than one who presents a few days after an incident and is fully weight bearing, defined by the ability to take four steps. A delay in seeking help can suggest a chronic rather than an acute problem. At the time of the injury, the patient may have heard a snap or tear but, while these may be diagnostically significant in an acute knee injury, they are not in an acute ankle injury (Bennet 1994). Where? Asking where an injury occurred helps to ascertain issues relevant to the injury such as whether it happened at work. If so, a health and safety issue may arise there, pos sibly involving flooring or footwear. Other 28 EN1404 24-34 CPDLnm623.indd 28 Why and how questions clarify circum stances before and during the incident and provide a picture of the trauma event. For example, did the patient slip on a wet floor? Was there dizziness or pain before falling? Can the patient give a clear picture of the event? Is the patient confused or complaining of chest pain? Such questions rule out any clinical cause for the injury. How a patient’s lower leg became twisted, or how a blunt trauma was received, as well as the approximate positioning of the limb at the time of injury, are significant points to note for an accurate diagnosis. Knowing what the patient was doing at the time of injury can help to estimate the severity of the forces to the foot or ankle (Garrick and Schelkun 1997). The talus of the ankle is more susceptible to inversion forces in plantar flexion (Fig. 6) than dorsiflexion (Fig. 7), when there is bony stabilisation in the mortise. The most common mechanism of injury in ankle sprains is a combination of plantar flexion and inversion (Fig. 8). The lateral ligaments, which are referred to earlier, are often damaged, particularly the ATFL (Attarian et al 1985, van Dijk 2002). What happened next? Ask the patient what happened after the incident. Did they weightbear or have they not walked since? Did they apply ice or take any analgesia before coming to A&E? TIME OUT 5 Have you ever injured your ankle or foot? If not, find a colleague who has and take a history using the points discussed above. Start with when, where, why, how and what happened next. What were their immediate symptoms? Relevant symptoms Pain, bruising, or ecchymosis, swelling and deformity can be present after injury to the foot or ankle: emergency nurse vol 14 no 4 july 2006 10/7/06 4:37:00 pm n Pain is significant and its severity and locat ion are useful guides for diagnosis. Some pain can be referred from other injuries and careful physical examination helps to be specific about whether it is the foot or ankle that is actually injured. If the patient cannot give a good history, pain indicators can be useful (Guly 1996) n Ecchymosis can take a while to develop and, because of gravity, often pools around the foot n Swelling can develop up to 24 hours after injury. If the limb is not elevated and the patient presents after a few days, gross swelling can make the site of pain more difficult to locate. Swell ing that occurs immediately rather than over a few days is often indicative of a more severe injury (Nurse and Rimmer 2001). The site of swelling can suggest the location of the pathology, and the degree of swelling is usually, but not always, a reliable indication of sever ity. The affected and unaffected limbs should be compared because patients with clinical disorders such as renal or heart failure can have residual chronic pitting oedema n Gross deformity should not occur with an ankle injury, although severe swell ing can give this impression (Wolfe et al 2001). An obvious deformity requires immediate intervention because it can indicate ankle dislocation and therefore threaten limb function. Relevant previous injury A recurrent injury can indicate ligament instability (Guly 1996). If there is a wound, tetanus status is needed, although other details, such as clinical history, regular and recent medications, and history of aller gies, are also relevant to treatment. Factors such as whether patients live alone or have other disabilities and so require early physio- or occupational therapy need to be addressed at this early history taking phase. TIME OUT 6 How is pain assessed in emergency departments? Do you use pain indicators? What can be done to alleviate pain before drug intervention for a patient with lower leg trauma? Physicial Examination Following history taking, a directed, system atic, physical examination is undertaken to clarify diagnosis and management options and to ensure that associated injuries are not overlooked (Hockenbury and Sammarco 2001). More experienced nurses are familiar with history taking and accurate physical examination. The ‘look, feel and move’ guide is one commonly used approach (Wardrope 1998). Look First assess the patient’s gait and whether they are weightbearing; remember that the ability to take four steps or two trans fers, is defined as fully weightbearing even if the patient limps. The examination should be carried out on a bench or trolley with both limbs exposed fully to above the knee so that any wounds, haematomas, old scars, or obvious gross deformities can be seen immediately. Fig. 8. Ankle inversion and eversion sprains Strained medial collateral ligament Inversion sprain vol 14 no 4 july 2006 emergency nurse EN1404 24-34 CPDLnm623.indd 29 Peter Gardiner Strained lateral collateral ligament Eversion sprain 29 10/7/06 4:37:02 pm continuing professional development A deformity suggestive of dislocation requires immediate treatment and exper ienced help. Lower limb discolouration, reduced sensation or severe pain can also indicate dislocation that is affecting blood flow and nerve transmission (Karls son et al 2003). Neurovascular injury is the principal con cern with any dislocation because vascular compromise can cause avascular necrosis of the talus if it is not quickly reduced. Tented, white skin, which occurs when the disloc ated bone has moved, can be subject to ischaemic necrosis (Mackway-Jones 1997). In patients with obvious or complete neurovascular compromise, reduction and splinting are needed to avoid vascular compromise. Limb position and possible fractures can then be viewed using X‑rays (Keaney 2005). Wounds can be cleaned and covered with a temporary povidone-iodine non-adhesive dressing at this stage (Holt 2000). Feel A thorough physical examination can help decrease the need for many X-rays, but the obvious area of injury should be palpated last to avoid causing pain immediately, which can make patients anxious. Fig. 9. Ligaments and tendons of the right lower leg Peroneus longus Peroneus brevis Calcaneofibular ligament (CFL) Peroneus brevis tendon attached to the base of the fifth metatarsal 30 EN1404 24-34 CPDLnm623.indd 30 Start at the head of the fibula and palpate to 6cm posterior to the lateral and medial malleolar tips. Palpate the calcaneus and ensure that the Achilles tendon is intact. Compare its insertion with the unaffected limb and use the calf squeeze test, also known as the Thompson test or Simmonds test, to assess for rupture. To do the test, ask the patient to lie front down and squeeze both calf muscles. This should result in normal plantar flexion; it is considered positive if there is no response. Palpate all the bones of the foot, includ ing the tarsals, metatarsals and phalanges. The base of the fifth metatarsal, where the peroneus brevis tendon is attached (Fig. 9), is a common site of fracture when the peroneus brevis tendon is pulled in an inversion injury. X-rays The Ottawa Ankle Rules (Fig. 10) are a set of criteria developed by Stiell et al (1992) in Ottawa to help practitioners decide whether patients with acute ankle injury need X-ray. In brief, an ankle radiographic series is indicated only if the patient has pain near a malleolus and: n Is 55 years or older n Cannot weightbear on the ankle after injury n Has bone tenderness at the posterior edge or tip of either malleolus and can not walk four steps on it, or n Has pain in the midfoot zone at the navicular region or at the base of fifth metatarsal (Stiell et al 1994). When the rules were published, the authors claimed that they had 100 per cent sensit ivity and 40 per cent specificity for detect ing malleolar fractures so that all patients who truly had fractures would be X-rayed (Stiell et al 1992). Neurovascular status The neurovascular status of the limb can be checked by touch, first to determine temper ature; high temperature suggests infection while low temperature suggests ischaemia. Capillary refill can be tested by push ing on the tip of the big toe or the nail bed until blanching occurs. When either is released, the length of time it takes for a red colour to return is noted. If this is more than three seconds, an abnormality emergency nurse vol 14 no 4 july 2006 10/7/06 4:37:03 pm consistent with arterial insufficiency is considered to be present. Pedal pulses must also be checked. The most dorsal prominence of the navicu lar bone provides a landmark by which to locate the dorsalis pedis, while the groove between the medial malleolus and the Achilles tendon helps locate the posterior tibial artery (Mowlavi et al 2002) (Fig. 4). The common peroneal nerve, which winds around the neck of fibula, can be injured resulting in footdrop and loss of sensation in the lower anterior leg and dorsum of foot. This nerve is also at risk of anterior compartment syndrome. Compartment syndromes Trauma can cause compartment syn dromes in the lower leg or foot as in other parts of the body. The mechanism of injury here is usually severe local trauma, though associated skeletal injury may be minimal, with the classic warning sign being intense pain unrelievable by analgesia. Initial symp toms are progressive pain, numbness in the toes and decreased motion, but the most reliable sign is tense tissue bulging (Fakhouri and Manoli 1992). If compartment syndrome is suspected, immediate attention is required to avoid loss of limb. Treatment of acute compartment syndrome usually involves a fasciotomy, in which longitudinal incisions are made in each of the affected compartments. These incisions are left open to be sutured at a later date (Swain and Ross 1999). Assessing ligament damage Palpate the collateral ligaments, namely the deltoid ligament and the ATFL, CFL and PTFL, to determine which structures may have been injured. TIME OUT 7 Check your own pedal pulses. Work with a colleague, referring to an anatomy book on the arterial blood flow to the lower limbs. Fig. 10. The Ottawa Ankle Rules Posterior edge or tip of lateral malleolus Posterior edge or tip of medial malleolus Malleolar zone Midfoot zone 6cm 6cm Lateral view An ankle X‑ray series is required only if there is pain in the malleolar zone and any of these findings: n Bone tenderness at the posterior edge or tip of the lateral malleolus n Bone tenderness at the base of fifth metatarsal n An inability to weightbear immediately or when in emergency department vol 14 no 4 july 2006 emergency nurse EN1404 24-34 CPDLnm623.indd 31 Navicular bone Medial view A foot X‑ray series is required only if there is pain in the midfoot zone and any of these findings: n Bone tenderness at the base of the fifth metatarsal n Bone tenderness at the navicular bone n An inability to weightbear immediately or when in emergency department Peter Gardiner Base of fifth metatarsal 31 10/7/06 4:37:04 pm continuing professional development Initial emergency treatment Once a clinical dislocation has been ruled out, the patient’s pain must be addressed. Treat ment with Protection, Rest, Ice, Compression and Elevation (PRICE) is recommended for both initial management in an emergency setting and discharge management. The goal is to prevent swelling, bleeding and oedema around the capsule of the ankle, which can result in loss of motion (Garrick and Schelkun 1997). Activities should be reduced to allow healing while resting, and cryothearpy should be used immediately (Knight 1995). This can be done with ice packs placed on a thin layer of cloth on the foot or ankle; ice applied directly to the skin can damage it. Heat should not be applied in the acute phase because it encourages swelling and inflammation (Wolfe et al 2001). Limb elevation by between 15 and 25cm above the level of the hip encourages venous and lymphatic drainage until the swelling resolves. Immobilisation with splints can be necessary for patients with possible fractures, or who are non-weightbearing and in pain. Temporary vacuum splints are practical and help reduce pain by stab ilising any potential fracture (Holt 2000). Analgesia should be given immediately and before examination if required. Fig. 11. The anterior drawer test Fig. 12. The talar tilt test Tom Walsh Laxity tests Eighty five per cent of ankle injuries are sprains, and 85 per cent of lateral collateral ligaments, namely ATFL, CFL and PTFL, are injured through inversion sprains (Garrick 1997, Wolfe et al 2001). Diagnosing ankle ligament rupture can be supported by laxity tests after foot or ankle fracture has been excluded. References Attarian DE, McCrakin HJ, Devito DP, McElhaney JH, Garrett WE Jr (1985) Biomechanical characteristics of human ankle ligaments. Foot and Ankle International. 6, 2, 52-58. Barker HB, Beynnon BD, Renstrom PA (1997) Ankle Injury risks factors in sports. Sports Medicine. 23, 2, 69-74. Bennet WF (1994) Lateral ankle sprains part 1: anatomy, biomechanics, diagnosis and natural history. Orthopaedic Review. 23, 5, 381-387. Bruker P, Khan K (1998) Ankle acute injuries. In Fahey TD (ed) Encyclopedia of Sports Medicine and Science. www.sportsci.org/encyc/ankacuinj/ankacuinj. html (Last accessed June 20 2006). 32 EN1404 24-34 CPDLnm623.indd 32 Fakhouri AJ, Manoli A (1992) Acute foot compartment syndromes. Journal of Orthopaedic Trauma. l6, 2, 223-228. Garrick JG (1997) The frequency of injury, mechanism of injury and epidemiology of ankle sprains. American Journal of Sports Medicine. 5, 6, 241-242. Garrick JG, Schelkun PH (1997) Managing ankle sprains: keys to preserving motion and strength. The Physician and Sports Medicine. 25, 3. www.physsportsmed.com/issues/ 1997/03mar/garrick.htm (Last accessed June 20 2006). Guly H (1996) History Taking: Examination and record keeping in emergency medicine. Oxford University Press, Oxford. Hockenbury RT, Sammarco G (2001) Evaluation and treatment of ankle sprains. The Physician and Sports Medicine. 29, 2, 28-39. Holt L (2000) Skeletal injuries. In Dolan B, Holt L (eds) Accident and Emergency: Theory into practice. Baillière Tindall/RCN, London. Kannus P, Renstrom P (1991) Treatment of acute tears of the lateral ligaments of the ankle: operation, cast or early mobilization. American Journal of Bone and Joint Surgery. 73, 2, 305-312. Karlsson J, Rolf C, Orava S (2003) Lower leg, ankle and foot. In Kjaar M, Krogsgoard M, Magnusson P et al (eds) Textbook of Sports Medicine. Blackwell Publishing, Boston MA. Keaney J (2005) Dislocation: Ankle. www.emedicine. com/EMERG/topic140.htm (Last accessed June 20 2006). Kesson M, Atkins E (1998) Orthopaedic Medicine: A practical approach. Butterworth and Heinemann, Oxford. emergency nurse vol 14 no 4 july 2006 10/7/06 4:37:15 pm The anterior drawer test assesses the stability of the ATFL and is undertaken by cupping the heel in one hand and pulling it forward while stabilising the tibia with the other hand (Fig. 11). Movement, or translation, of more than 10mm, or a 3mm difference between sides, suggests ATFL disruption (Kannus and Renstrom 1991). Comparison of the affected and uninjured sides is critical because the degree of laxity varies greatly between patients. The talar tilt tests both the ATFL and CFL. The ankle is inverted and the laxity compared to that of the uninjured side (Fig. 12). A complete rupture is evidenced by a talar tilt of at least 20° and one that is at least 10 per cent greater than on the uninjured side, and is considered a third degree ankle sprain (Rubin 1997). TIME OUT 8 Practice laxity tests with your colleagues. Remember which ligaments in the lateral complex you are straining. Ankle sprain classification Ankle sprains range in severity from Grade I to Grade III. A review of the literat ure shows that there are slight variations in labelling: n Grade I injuries involve a stretch of the ligament with microscopic, but not macroscopic, tearing. Generally, little swelling is present, with little or no functional loss and no joint instability. Patients can weightbear fully with no mechanical instability n Grade II sprains involve a stretch of the ligament with partial tearing, moderateto-severe swelling, ecchymosis, moderate functional loss and mild-tomoderate joint instability n Grade III sprains involve ligament rupture so that the patient cannot weightbear (Renstrom and Konradson 1997). Prevention Nurses can advise patients that maintaining good muscle strength, balance and flexibil ity can help prevent ankle sprains, as can warming up and stretching the muscles and tendons that anchor the ankle before exercise or other vigorous activities. Other advice includes: n Paying attention to walking, running or work surfaces n Obtaining advice on appropriate footwear for specific activities, making sure that shoes fit properly and avoiding high heels n Paying attention to physical warning signs such as pain and fatigue that can indicate a need to slow down n Losing weight to reduce the strain on the ankles, if appropriate n Avoiding sports and activities for which people are not conditioned n Using ankle support braces if people are prone to ankle pain or twisting during certain activities. Conclusion A good knowledge and understanding of the anatomy and physiology of the foot and ankle enable nurses working in emerg ency settings to undertake thorough and accurate physical examinations of sus pected ligamentous injuries. Combined with comprehensive patient histories, these can help ensure accurate diagnoses, and initiate treatment or refer ral to the relevant departments. Knight KL (1995) Cryotherapy in Sport Injury Management. Human Kinetics, Champaign IL. Rubin A (1997) Ankle ligament sprains. In Sallis R, Mackway-Jones K (1997) Emergency Triage. BMJ Publishing, London. Medicine. Mosby, Oxford. Miller MD (1996) Review of Orthopaedics. WB Saunders, Philadelphia PA. Emergency Nurse. 11, 3, 12-16. Mowlavi A, Whiteman, J, Wilhelmi, BJ, Neumeister MW, McLafferty R (2002) Dorsalis pedis arterial pulse: palpation using a bony landmark. Postgraduate Medical Journal. 78, 926, 746-747. A study to develop clinical decision rules for Nurse N, Rimmer M (2001) Musculoskeletal disorders. In Cross S, Rimmer M (eds) Nurse Practitioner: Manual of Clinical Skills. Baillière Tindall/RCN, London. Stiell IG, McKnight RD, Greenburg GH et al Renstrom P, Konradson B (1997) Ankle ligament injuries. British Journal of Sports. 31, 1, 11-20. vol 14 no 4 july 2006 emergency nurse EN1404 24-34 CPDLnm623.indd 33 Massamino F (eds) ACSM’s Essentials of Sports Smith M (2003) Ankle Sprain: a literature search. Stiell IG, Greenberg GH, McKnight RD, Nair RC, McDowell I, Worthington JR (1992) the use of radiography in acute ankle injuries. Annals of Emergency Medicine. 21, 4, 384-390. (1994) Implementation of the Ottowa ankle rules. Journal of the American Medical Association. 271, 11, 827-832. Swain R, Ross D (1999) Lower extremity compartment syndrome: when to suspect acute or chronic pressure build up. Postgraduate Medicine Online. 105, 3. www. postgradmed.com/issues/1999/03_99/swain.htm (Last accessed June 29 2006). van Dijk CN (2002) Management of the sprained ankle. British Journal of Sports Medicine. 36, 2, 83‑84. Wardrope J, English B (1998) Musculoskeletal Problems in Emergency Medicine. Oxford. Oxford University Press. Wolfe MW, Uhl TL, McCluskey LC (2001) Management of ankle sprains. American Family Physician. 62, 1, 93-104. Yeung MS, Chan KM, McPhil CHS, Yuan WY (1994) An epidemiological survey on ankle sprain. British Journal of Sports Medicine. 28, 2, 112-116. 33 10/7/06 4:37:16 pm continuing professional development Continuing professional development Practice profile Complete this form using a ballpoint pen and CAPITAL letters only 1. First name: 2. Surname: 3. Job title: 4. Place of work: 5. Full title and date of article: 6. Number of article: 7. Permanent address: 8. Postcode: 9. Daytime telephone: 10. I would like my practice profile to be considered for publication in Emergency Nurse Yes ■ No ■ Please cut out this form and send it with your practice profile in an envelope no smaller than A4 to: Practice Profile RCN Publishing Company Freepost PAM 10155 Harrow Middlesex HA1 3BR What do I do now? n Using the information in section 1 below to guide you, write a practice profile of between 750 and 1,000 words – ensuring that you have related it to the article you have studied. See the examples given in section 2 below. n Write ‘Practice Profile’ at the top of your entry followed by your name, the title of the article, which is Assessment of acute foot and ankle sprains, and the article number, which is EN623. n Complete all the fields of the cut-out form below and attach it to your practice profile using a paperclip. Failure to do so will mean that your practice profile cannot be consid ered for a certificate. n You are entitled to unlimited free entries. Using an A4 envelope, send for your free assessment to: Practice Profile, RCN Publish ing Company, Freepost PAM 10155, Harrow, Middlesex HA1 3BR by August 1 2007. Email practice profiles to practiceprofile @rcnpublishing.co.uk. You must provide the same information that is requested on the cut-out form. Type ‘Practice Profile’ in the email subject field to ensure you are sent a response confirming receipt. n You will be informed in writing of your result. A certificate is awarded for successful com pletion of the practice profile. You are entitled to one retake if you are unsuccessful. n Feedback is not provided: a certificate indi cates that you have been successful. If you wish your practice profile to be considered for publication in Emergency Nurse, indicate this on the form. n Add a copy to your professional portfolio – copies of practice profiles are not returned. 1. Framework for reflection Consider these points before submitting your practice profile. n What have I learnt from this article and how does it relate to my practice? n To what extent were intended learning out comes met? n What do I know, or can I do, now, that I did not or could not before reading the article? n What can I apply immediately to my practice or patient care? n Is there anything that I did not understand, or that I need to explore or read about fur ther, to clarify my understanding? n W hat else do I need to do or know to extend my professional development in this area? n What other needs have I identified in relat ion to my professional development? n How might I achieve the above? 2. Practice profile example Example 1 After reading a CPD article on ‘Communication skills’, Jenny, a practice nurse, reflects on her own communication skills and re-arranges her clinic room so that she will sit next to her patients when talking to them. She makes a conscious decision to pay attention to her own body language, posture and eye contact, and notices that communication with patients improves. This forms the basis of her practice profile. Example 2 After reading a CPD article on ‘Wound care’, Amajit, a senior staff nurse on a surgical ward, approached the nurse manager about his concerns about wound infections on the ward. Following an audit that Amajit undertook, a protocol for dressing wounds was established, which led to a reduction in wound infections in his ward and across the directorate. Amajit used this experience for his practice profile and is now taking part in a region wide research project. 3. Portfolio submission Checklist for submitting your practice profile ✔ Have you related your practice profile to the article? ✔ Have you headed your entry with: the title ‘Practice Profile’; your name; the title of the article; and the article number? ✔ Have you written between 750 and 1,000 words? ✔ Have you kept a copy of the practice profile for your own portfolio? ✔ Have you completed the cut-out form and attached it to your entry? ✔ Have you indicated whether you would like your practice profile to be considered for publication? ✁ 34 EN1404 24-34 CPDLnm623.indd 34 emergency nurse vol 14 no 4 july 2006 10/7/06 4:37:17 pm
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