Chapter 7 Orthopedic Emergencies PDF

Chapter 7 ORTHOPEDIC EMERGENCIES Learning Objectives: Take a proper relevant history, and perform a “Focused Physical Examination “or a “Rapid Trauma Examination” based on the mechanism of injury or illness. Identify orthopedic emergencies as well as common orthop...

Chapter 7 ORTHOPEDIC EMERGENCIES Learning Objectives: Take a proper relevant history, and perform a “Focused Physical Examination “or a “Rapid Trauma Examination” based on the mechanism of injury or illness. Identify orthopedic emergencies as well as common orthopedics injuries in the community Recognize situations which call for urgent or early treatment at specialized centers and make a prompt referral Plan and interpret relevant investigations, particularly x- rays Arrive at a logical working diagnosis after examination and review of investigations Order relevant laboratory investigations and imaging studies and interpret them. Plan and provide emergency care or initiate treatment. CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES INTRODUCTION Orthopedic emergencies especially from trauma have been increasing exponentially over the years. A study of JDWNRH surgical admission records carried out in 2006 showed that 60.8% of the trauma cases were admitted in the orthopedic ward. It is a known fact that in any mass casualty situation, orthopedic injuries out number all other injuries. Orthopedic or musculoskeletal injuries can result either from falls, road traffic crashes or from exposure to mechanical forces. Musculoskeletal injuries can range from minor to limb threatening and even life threatening in serious cases. Proper and timely intervention of these injuries can go a long way in reducing the complications and thereby morbidity. orthopedic infections such as septic arthritis or acute osteomyelitis also require immediate attention as any delay will cause increased morbidity later on. It is our experience that the primary care of orthopedic cases in the districts is not up to the mark especially in relation to the management of orthopedic emergencies. Many cases which can easily be managed at the district hospitals get unnecessarily referred to the higher centers. Keeping in view these facts a guideline for the primary care of orthopedic emergencies is developed in order to improve emergency care of orthopedic patients in the peripheral hospitals and thereby reduce unnecessary and inappropriate patient referrals. APPROACH TO ORTHOPEDIC PATIENTS History: Chief complaint. Mechanism of injury. History: OPQRST (Onset, Provoking/ alleviating factors, Quality/ Quantity, Radiation, Site, Timing) Constitutional symptoms- fever, night sweats, fatigue, wt. loss. Referred symptoms AMPLE history (Allergies, Medications, past medical history, last eaten Events leading to) Physical Examination: Look: SEADS (swelling, erythema, atrophy, deformity and skin changes). Move: Active then passive range of movement (ROM) for affected joint(s) and joints above & below. Neurovascular tests: Pulse, sensation, reflexes, power (0 to 5). Investigations: Plain x-ray: AP, lateral and oblique It is very important to get correct views for proper diagnosis. X-Ray rule of 2s: 2 sides= bilateral (comparison views in children when in doubt) 2 views= AP + lateral 2 joints= joint above + below 2 times= before and after reduction Blood: CBC, Grouping Aspiration: aspirate fluid from joint for analysis Ultrasound where appropriate EMERGENCY MEDICAL SEVICES DIVISION, 2018 87 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Principles of Emergency Care of Musculoskeletal Injuries Perform initial patient assessment- obtain relevant history and perform a “Focused PE” or “Rapid Trauma/Illness Survey” based on the nature or injury or illness. During a rapid trauma exam, apply a cervical collar if spine injury is suspected. After life-threatening conditions have been addressed, any patient with a swollen or deformed extremity must be splinted. If an initial assessment reveals the patient is unstable, managing extremity injuries become a low priority. An unstable patient with “load and go” problems must have the ABCs managed and the entire body splinted or immobilized on a long spine board. No time should be wasted to splint each injury individually. Irrigate open wounds with plenty of NS and cover with sterile dressings and start IV antibiotics. DO NOT SUTURE dirty or complex wounds. Basic Fracture Evaluation & Management Start with ABCs, primary & secondary surveys. Thorough exam of the fracture location: o Location along the length of bone– proximal 1/3, middle 1/3, distal 1/3. o Open or closed? o Associated dislocation? o Perform a complete neurovascular exam. Carry out relevant imaging studies. R/o other associated injuries- chest, abdomen, etc. Take AMPLE history. Give analgesics as required. Carry out appropriate splinting of injured limbs before moving the patient. If reduction performed, test neurovascular status before AND after. Refer if necessary. Complication of Fractures Local: Early: – Compartment syndrome – Neurovascular injury – Infection – Fracture blisters Late: – Mal/nonunion – Avascular necrosis (AVN) – Osteomyelitis – Post-traumatic arthritis – Reflex sympathetic dystrophy (RSD) Systemic: – Sepsis – Deep vein thrombosis – Pulmonary embolism EMERGENCY MEDICAL SEVICES DIVISION, 2018 88 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES – Acute respiratory distress syndrome (ARDS) – Hemorrhagic shock Ordering X-Ray Investigations When ordering x-rays, one must include all relevant views. It is very important to get correct views for proper diagnosis. Pediatric X-rays Pediatric x-rays look different because of the ongoing growth. Can see normal gaps between bones (growth centers). Don’t mistake these for a fracture. Must compare with the contralateral side if unsure of fracture. Describing Orthopedic X-rays The following points must be kept in mind when describing orthopedic x-rays: Anatomic location: – Which bone and location within the bone Pattern of fracture: – Transverse- perpendicular to long axis – Oblique- at angle from the long axis – Spiral- curves around the shaft of the bone – Comminuted- more than 2 fragments Impacted? Compressed? Depressed? Displacement: fragments shifted in relation to each other Figure 7.1 X-ray of a knee in Angulated: angle between longitudinal axis of fragments child showing growth plates. Intra-articular: fracture extends into the joint (gaps) ACUTE ORTHOPEDIC EMERGENCIES Open fractures. Multiple long bone fractures & pelvic fractures. Major joint dislocations, e.g. Knee, hip. Fractures and dislocations with evidence of neurovascular compromise. Compartment Syndrome. Septic joint & Osteomyelitis. Cauda Equina Syndrome. All the above conditions need prompt and timely action or the patient may lose the limb or even life. Open Fractures: Definition: broken bone with communication with external environment Emergency Management: – Start IV antibiotics – Splint the fracture – Will require emergent operative management – Do not reduce bone back into wound unless N-V comprise – Early copious irrigation with NS- irrigate open wound with 9-12 L of NS – Cover with a sterile dressing – Apply an appropriate splint (Immobilize) EMERGENCY MEDICAL SEVICES DIVISION, 2018 89 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES – Tetanus inoculation – Keep NPO and make urgent referral Figure 7.2 Pictures showing severely comminuted open fractures both bones of left leg. Multiple Long Bone Fractures & Pelvic Fractures: Etiology: High energy trauma. Generally multiple lower extremity and/or pelvic fractures. May be associated with spinal or life-threatening injuries. Clinical Presentation: local swelling, tenderness, deformity of the hips and instability of the pelvis with palpation Investigations: Routine views of pelvis: AP, inlet, outlet and Judet views (iliac oblique and obturator oblique), push-pull views to assess rotational and vertical instability. AP and lateral XR of all long bones suspected to be injured. Management: ABCDE. assess genitourinary injury (DRE/vaginal exam mandatory). If patient with pelvic fractures is in shock, pelvic binding or circumferential sheeting must be done to control internal bleeding. Urgent referral after stabilizing the patient. Complications: hemorrhage – life threatening ARDS fat embolism syndrome pulmonary embolism bladder/bowel injury neurological damage obstetrical difficulties in future persistent SI joint pain post-traumatic arthritis of the hip with acetabular fracture EMERGENCY MEDICAL SEVICES DIVISION, 2018 90 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Figure 7.3 Clinical photograph showing external rotation and leg discrepancy in the patient with an open pelvic fracture. Figure 7.4 Circumferential sheeting and pelvic binder Compartment Syndrome: It is defined as: – Increased interstitial pressure in an anatomic compartment. – Interstitial pressure exceeds capillary perfusion pressure leading to muscle necrosis (in 4- 6 hrs.) and eventually nerve necrosis. Presentation: The 6 P’s of Compartment Syndrome: - Pain out of proportion to the injury - Pain not relieved by analgesia - Pain increased with passive stretch of compartment muscles (most specific) - Pallor - Paresthesia - Polar: cold limb (late finding) - Paralysis (late finding) - Pulselessness (late finding) Management: Divide all dressings down to skin from top to bottom. Remove all constrictive dressings (casts, splints). Elevate the limb. Reassess in 20 minutes Refer for urgent fasciotomy to decompress compartmental pressure Complications: Rhabdomyolysis, renal failure secondary to myoglobinuria, Volkmann’s ischemic contracture Figure 7.5 Compartment syndrome involving left forearm after a simple radius fracture – due to too tight splinting by “Traditional healers”- patient presented too late for limb salvage. EMERGENCY MEDICAL SEVICES DIVISION, 2018 91 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Septic Joint and Osteomyelitis: Septic Joint- – Infection within joint space. – Direct inoculation or hematogenous spread. – Often staph or strep species, maybe GC. – Localized joint pain with warmth, swelling and restriction of active and passive ROM. Investigation: – Blood- CBC, ESR, CRP, culture. – Joint aspirate- frank pus or turbid fluid. Management: – Emergency decompression in the OR and thorough irrigation. – IV Antibiotics. Osteomyelitis- Etiology: Most common organism is S. aureus. Neonates and immunocompromised patients are susceptible to gram negative organisms. Clinical presentation: Localized extremity swelling with pain and fever Investigations: Blood CBC (leukocytosis), ESR, Blood culture. Aspirate cultures. X-rays: changes may not be seen until 1-2 weeks after. Management: Emergency surgical decompression and wash out. IV antibiotics. Urgent referral required. Cauda Equina Syndrome: Compression of lumbosacral nerve roots below conus medullaris secondary to large central herniated disc (L4-5 or L5-S1) ± spinal stenosis, extrinsic mass like tumor or burst fracture. Clinical presentation consists of progressive neurological deficit presenting with: Motor- weakness/paraparesis in multiple root distribution. reduced deep tendon reflexes (knee and ankle). sphincter disturbance (urinary retention and fecal incontinence due to loss of anal sphincter tone). EMERGENCY MEDICAL SEVICES DIVISION, 2018 92 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Sensory- saddle anesthesia (most common sensory deficit). pain in back radiating to legs. bilateral sensory loss or pain: involving multiple dermatomes. sexual dysfunction (late finding). Management: Emergency decompression surgery- will result in Figure 7.6 Diagram showing conus permanent urinary/bowel incontinence if prompt medullaris and cauda equine (Pooja action is not taken. & Brian, HHI). surgical emergency - requires urgent investigation and decompression (40yrs, especially women with osteoporosis. Management: Closed reduction (CR) under hematoma block – apply traction, increased dorsal angulation followed by volar flexion in an ulnar directed force. Apply below elbow cast for 6 weeks. If unstable refer for open reduction and internal fixation (ORIF). Figure 7.13 Pictures showing distal radius fracture with dinner fork deformity (left), Closed Reduction technique (middle), and Short arm cast (right) Radius and Ulna Fractures: Isolated ulna fracture is called a “night stick” fracture. Most night stick fractures can be treated by casting. Both bone forearm fractures are usually displaced and may develop compartment syndrome. Apply long arm splint and refer for ORIF as most both bone fractures will require surgery. EMERGENCY MEDICAL SEVICES DIVISION, 2018 96 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Figure 7.14 Pictures showing X-ray of both bone fracture of forearm and long arm posterior splint (Courtesy: Pooja & Brian, HHI). Galeazzi Fracture: Definition – Fracture of the distal radial shaft with disruption of distal radio-ulnar joint. Management – Apply a long arm splint and refer for ORIF. Monteggia Fracture: Definition – Fracture of the proximal ulna with dislocation of the radio-capitellar joint. Management – Apply a long arm splint and refer for ORIF. Figure 7.15 Pictures showing X-rays of Galeazzi fracture (left) and Montaggia fracture (right). Elbow, Arm and Shoulder Injuries: Nursemaid’s Elbow- History of being swung by the arm, peak age 1-4 years. Forearm held flexed & pronated, reluctant to move. Subluxation of radial head beneath ligament Management: Reduce by supinating forearm and flexing elbow. Figure 7.16 Diagram showing close reduction technique of Nursemaid’s elbow. Elbow Dislocation: Majority is posterior. Must be aware of Neuro-Vascular injury. Management: – Immediate closed reduction (CR) under sedation and apply a long arm splint with forearm neutral rotation elbow in 90 degrees flexion. – Start early ROM (90%. Arm held in slight abduction, external rotation and internal rotation is blocked- “square off” shoulder. Investigations: – X-rays: AP, trans-scapular, axillary lateral – Humeral head is anterior to the “Mercedes Benz sign” in the trans-scapular view. Treatment: – Closed reduction by traction and counter traction ASAP with IV sedation & muscle relaxation. – Sling for 3 weeks. EMERGENCY MEDICAL SEVICES DIVISION, 2018 98 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Figure 7.20 Pictures showing different closed reduction techniques for shoulder dislocations. Clavicle Fractures: Mechanism: FOOSH. Locations: Medial third, distal third. Unless open or severely displaced, non-operative treatment should be the standard of care. Treatment: – Cuff and collar sling. – Figure of 8 bandage. – Pain medication and reassurance. – No referral is necessary unless with complications. Scapula Fractures: Results from high impact injuries. Assess for intrathoracic or chest injuries. May also see concurrent shoulder injuries (dislocations). Mostly conservative treatment should suffice- sling, pain medication. Refer only if associated with complications. Pelvis, Hip and Femur Injuries: Pelvis Fractures: Stable fractures: conservative treatment. Unstable fractures: must be aware of internal bleeding and shock. Resuscitate and stabilize the patient first May require surgical intervention Figure 7.21 Picture of CT scan of unstable pelvic fracture. Hip Fractures: Femoral neck fracture is common in elderly women. – Complication: avascular necrosis – Needs surgery within 6-8 hours, especially if young. Intertrochanteric fractures most common in elderly. Sub trochanteric fractures common in young with high energy trauma. Patients will present with external rotation, flexion and shortening of the limb. EMERGENCY MEDICAL SEVICES DIVISION, 2018 99 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Management: Apply Traction splint. Refer for surgery. Hip Dislocation: Anterior- uncommon Presentation- External rotation and abduction of the limb Posterior- common Figure 7.22 Picture of right hip dislocation Presentation -Internal rotation, flexion, and X-ray of Posterior dislocation of left hip. adduction, shortening Management: immediate closed reduction. Posterior Hip Dislocation: Reduce ASAP after dislocation since more difficult it becomes if delayed. Under sedation. Bed lowered or on floor. Hip flexed, lock hands in popliteal fossa. Second person stabilizes pelvis. Apply traction at 90°, gentle internal rotation with traction maintained at 90°. Femur Fractures: Potential for major blood loss, fat emboli, neurovascular injury. Splint extremity with traction splint. Treatment: ORIF or closed IM nailing. Knee, Tibia, Fibula, Ankle and Foot Injuries Knee Dislocation: Occurs following a high energy trauma Associated with high incidence of associated injuries! Popliteal artery tear, peroneal nerve injury, ACL/PCL rupture, capsular tears. Management: Immediate CR, otherwise patient may need amputation. CR: apply longitudinal traction to distal leg. Even after reduction, pulses may be reduced due to arterial damage. Important to do serial pulse checks and look for compartment syndrome. Tibia/Fibula Fractures: Figure 7.23 Pictures showing closed Most commonly fractured long bone. Figure 7.24 X-rays of hip fractures and a reduction techniques for hip dislocation. Most common open fracture. picture of Thomas splint immobilization. EMERGENCY MEDICAL SEVICES DIVISION, 2018 100 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES High incidence of NV injury and compartment syndrome. Management: depends on fracture type. If minimally displaced- long leg cast for 6-8 weeks. If displaced- ORIF. Apply Long leg splint and refer. Ankle Injuries: Ankle injuries may include distal tibia and fibula fractures, malleolar fractures, talus fractures or Figure 7.25 X-ray showing fracture femur with fracture dislocations. Ankle fracture-dislocations an inappropriately applied Thomas splint, the have high potential for neurovascular injury, ring of the Thomas splint is seen at the avascular necrosis, and skin break down. fracture site. Ankle fractures: Maisonneuve Fracture- External rotation of ankle. – Rupture of medial ligament – Proximal fibula fracture Missed on isolated ankle x-ray, need to get leg film Treatment: Apply “U” splint and refer for ORIF Ankle Dislocation: Posterior ankle dislocation is most common. Management: Reduce emergently and Apply a “U” splint Refer ORIF Figure 7.27 X-ray of fracture-dislocation of the ankle and diagram showing closed reduction technique (Courtesy: Pooja & Brian, HHI). Figure 7.26 X-ray of Posterior dislocation and picture of splinting of knee injuries. EMERGENCY MEDICAL SEVICES DIVISION, 2018 101 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES CR method: Hold foot in plantar flexion Apply axial traction to ankle Apply posterior traction to distal tibia and anterior pressure on heel of foot Ankle Sprains: Most involve lateral ligaments: Anterior talofibular (ATF), Calcaneofibular (CF) and Posterior talofibular (PTF) ligaments. Treatment: based on stability. Unstable: Below knee walking cast. Stable: rest, ice, compression, elevation (RICE). Foot Fractures: Common foot fractures are: Calcaneal Fracture. Avulsion fracture base of 5th MT (Dancer’s Figure 7.28 Picture of long leg POP splint fracture). Transverse fracture of 5th MT (Jones’ Fracture). Lisfranc Fracture Dislocation (Fracture of MT base + MT dislocation). Management: will depend whether the fractures are displaced or not. If non-displaced, initially apply a short leg splint followed by short leg cast. Displaced fractures may need ORIF. Figure 7.29 X-ray showing Maissoneuve and bi-malleolar fractures respectively. Figure 7.30 X-ray of foot showing Lisfranc fracture and diagram of U splint immobilization (Pooja & Brian, HHI). SPINAL INJURIES Emergency Care of Spinal Injury Patients: General principles: Proper emergency care may prevent the need for extensive medical care and permanent disability. 1. Attend to ABCs with cervical spine immobilization. 2. Always assume spine injury in the unconscious patients who are injured. 3. Apply immediate gentle longitudinal support to the cervical spine. 4. Apply an extrication collar before the patient is moved. 5. Maintain cervical support until the patient is secured on a spine board. 6. Log roll and splint the patient before you move him or her. EMERGENCY MEDICAL SEVICES DIVISION, 2018 102 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Figure 7.31 Picture showing log rolling of a spine injury patient and immobilization on a spine board. Diagnosis of spinal injuries: History: Violent impacts to the head, neck or pelvis. Sudden acceleration or deceleration accidents. Falls from heights with the patient landing on the head or feet. Gunshot wounds to the neck or trunk. Physical Signs & Symptoms: In a conscious patient, pain over the spinous processes with or without Figure 7.32 Diagram of vertebra deformity. showing 3 column theory. Numbness, tingling or weakness in the limbs. Pain over the spine with movement. Tenderness over the spine. Absent or weak reflexes. Paralysis or anesthesia. Loss of bladder or bowel control. Concept of Spinal Stability Mechanical stability: maintain alignment under physiologic loads without significant onset of pain or intolerable deformity. Neurologic stability: prevent neural signs or symptoms under anticipated loads. Mechanical Stability 2-column theory (Holdsworth,’53): – Anterior = vertebral body, disc, ALL, PLL – Posterior = neural arch, Posterior ligament complex. 3-column theory (Denis ‘83): – Middle = posterior ½ vertebral body, posterior disc, posterior longitudinal ligament (PLL). Instability based on x-rays: Based on 3 column theory: – Injury to middle column combined with either anterior or posterior column. Compression fracture: – Degree of wedging is 200 or more. – Collapse of the anterior margin to less than half the posterior. Burst fractures. Fracture-dislocations. EMERGENCY MEDICAL SEVICES DIVISION, 2018 103 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Cervical Spine Recap of Anatomy 7 cervical vertebrae, 8 cervical nerve roots, nerve root exits above vertebrae, i.e. C4 nerve root exits above C4 vertebra. 4 lines – Anterior longitudinal, Posterior longitudinal, Spinolaminar and Spinous process. Clearing C-spine injury Criteria for clinical clearance: 1. No post midline tenderness 2. Full pain-free active ROM 3. No focal neuro deficit 4. Normal level of consciousness 5. No evidence of intoxication 6. No distracting injury Figure 7.33 X-rays of lateral views cervical Cervical Spine Injuries: spine – normal (left) and fracture C-6 In cervical spine injuries patient may either (right) (Courtesy: Pooja & Brian, HHI). present with neurological deficit (quadriplegia/paraplegia) at the onset from the injury or develop neurological deficit from improper handling of the patient. Therefore, suspected cervical spine injuries must be handled with great caution. Most common location of fractures of the c-spine are C5, 6 and 7. Lateral c-spine x-ray in trauma is the single most important thing in trauma evaluation. 2-3 % of all polytrauma victims have associated cervical spine injuries. X-rays: at least 3 views should be taken: AP, lateral and odontoid views, must be able to see all the 7 vertebrae. If disruption of any of the 4 lines is seen, consider ligamentous injury. T/L Spine Injuries : Most common sites of fracture are T12 and L1. Stable fractures may not present with any neurological problems but unstable fractures such as burst fracture, chance fracture and fracture-dislocations may present with paraplegia. Stable Fractures: Compression Fracture Wedge Fracture Spinous Process Fracture Unstable Fractures: Burst Fracture Chance Fracture Fracture-dislocations Burst fracture: - fracture extends into posterior vertebral wall May be stable or unstable Unstable Burst Fractures Related to PLC integrity >30 º relative kyphosis Loss of vertebral body height > 50% EMERGENCY MEDICAL SEVICES DIVISION, 2018 104 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Flexion-distraction injury- “seatbelt” injury: Common in children Most common associated non-spinal injury: perforated viscus Injury often involves 3-columns PLC disrupted or posterior neural arch fractured transversely MRI finding of disrupted PLC Fracture-dislocations: High-energy injuries Highest rate of SCI of all spinal fractures Thoracic--worst prognosis Rare non-operative management Unstable with multi-planar deformity Figure 7.36: X-rays showing burst fracture Management: and Chance fractures of lumbar spine. Immobilization on a spine board before movement. X-ray investigations-AP and lateral views. Referral for further treatment if unstable fractures with neurological problems. Acute Low Back Pain Extremely common presenting complaint. Most common cause of work-related disability. – Mechanical or strain/sprain. Most (90%) will resolve within a few weeks – Most cases cannot be given a specific diagnosis. D/D of Back Pain: – Mechanical- not due to any clearly defined pathology. – Degenerative- spinal stenosis, disc herniation). – Neoplastic- primary, metastatic. Approach to Back Pain Look for “red flags”: – History of cancer, unexplained weight loss – Radiculopathy with bowel/bladder dysfunction – Numbness or weakness in the legs See if there are factors that may prolong the pain: – Social or psychological factors Investigations: – Image if: trauma, failure to improve in 4-6 weeks – Image earlier if elderly – Blood CBC, ESR Reduction of Dislocations- General Principles Give adequate analgesia Evaluate and R/O concurrent fractures Assess neurovascular status before and after reduction Apply constant traction to fatigue contracted muscles EMERGENCY MEDICAL SEVICES DIVISION, 2018 105 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Often need to exaggerate dislocation to achieve reduction Splint after reduction SPECIFIC SPLINTS AND INDICATIONS Volar Short Arm Splint: Indications- Wrist sprain - apply splint to MCP joint. Metacarpal fracture- apply to DIP joint. Carpal tunnel syndrome. Application- Wrist: 20 degrees Plaster: 4-5 inches. Metacarpal fractures – Neck fracture: MCP joint 90° – Shaft fracture: MCP joint 70° Sugar Tong Splint: Indications- Good for any forearm fracture. Non-displaced distal radius fracture. Midshaft ulna/radius fracture. Application- Wrist: neutral position Elbow: 90° Splint to MCP joint Plaster: 4 inches Long Arm Splint: Indications- Ulnar nightstick fracture. Olecranon fracture. Midshaft humerus fracture (with humeral sugar tong). Application- Wrist: neutral Elbow: 90° Thumb up Plaster 4 inches. EMERGENCY MEDICAL SEVICES DIVISION, 2018 106 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Thumb Spica Splint: Indications- Thumb injuries and thumb MC fracture. Scaphoid fractures. de Quervain’s tenosynovitis. Application- Extends from IP joint to mid-forearm. Overlap MC 1 – 3. Thumb: “wine glass” position. Plaster 4 inches. Ulnar Gutter Splint: Indications Ulnar styloid fracture. 4th or 5th Metacarpal fracture. Fracture of 4th or 5th digit. Application- Incorporate 4th & 5th digits. Extends from DIP joint to forearm. Wrist & Forearm: neutral. MCP: 50° or 90° if MC fracture. DIP and PIP: 10° – 15°. Plaster: 3-4 inches. Radial Splint: Indications 2nd or 3rd Metacarpal fracture. Index of middle finger fracture. Application- Incorporate index & middle fingers, place cotton in between. Extends from DIP to proximal forearm. Wrist: 20°. MCP junction: 70°, if shaft fracture: 90°. DIP & PIP: 10° – 15°. Plaster: 6 in, cut thumb hole. Posterior Short Leg Splint Indication- Ankle sprain. Midfoot: metatarsal, tarsal fracture. Application- Extend from the great toe to the fibular head. Ankle: 90°. Plaster: 6 inches. Apply with patient lying prone. EMERGENCY MEDICAL SEVICES DIVISION, 2018 107 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Sugar Tong Ankle Splint: Posterior Long Leg Splint: Indication- Proximal tib/fib fracture. Unstable knee fracture/injury. Soft tissue injury. Application- Ankle: 90°. Knee: 15°. Plaster: 6 inches. Requires 2 people to apply. Key Messages ✓ You should be able to interpret x-rays ✓ Many orthopedic injuries can be treated by the initial provider, without transfer ✓ Be aware of orthopedic emergencies ✓ Make sure you use adequate anesthesia ORTHOPEDIC ANESTHESIA Local Anesthesia Action: Alters the depolarization of the nerve cells and prevents them from transmitting neurotransmitters Indications- Repair of lacerations in the extremities. I&D of abscess. Hematoma block for CR of fresh fractures. Lidocaïne (Lignocaine, Jasocaine, Xyloccaine) available as 1% or 2%. Onset: 5-15 minutes; duration: 1-3 hours, with epinephrine- up to 6 hours. Dosage: % = grams/100ml, (x10mg/ml); eg. 2% = 2g/100ml, ie. 20mg/ml. Max dose 4.5mg/kg or 300mg. If 1%, max dose = 30ml; 2% = 15ml. With epinephrine: 7mg/kg. Consider lower dosage for the elderly, children, impaired renal function, CHF. Adverse reactions: Severe- seizures, respiratory arrest, heart block, bradycardia. EMERGENCY MEDICAL SEVICES DIVISION, 2018 108 CLINICAL ORIENTATION MANUAL ORTHOPEDIC EMERGENCIES Common- lightheadedness, dizziness, hypotension, lethargy, tremor, vomiting, anxiety, confusion. Bupivacaine (Marcaine): Preparation: 0.25%; 0.5%. Onset: 20-30 minutes; duration: 6-8 hours, with epi. - up to 12 hours. Max dosage: 175mg, i.e. 35ml of 0.5% 0r 70ml of 0.25%; with epi: 225mg. Adverse effects: Same as lidocaine but has more cardiotoxic effects if used repeated doses. Procedural Sedation - Prior to joint reduction. ✓ Diazepam: 2-5mg iv q 2-5min, max 10mg total. Onset: 3-10min. Peak 20-60min. Duration: 2-8hrs. ✓ Midazolam: 0.5-2mg iv q2min. Onset 1-2min. Peak: 2 min. Duration: 15-90min. References 1. Apleys System of Orthopaedics & Fractures- Apley and Solomon. 2. Outline of Fractures-J. Crawford Adams. 3. Outline of Orthopaedics-J. Crawford Adams. 4. Essentials of Musculoskeletal Care-Walter B Greene. 5. Rockwood and Greens fractures in Adult 7th edition. 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