Med Yield Flashcards
What are effective chest compressions?
Compress by 5cm
Allow complete chest recoil
Rate 100-120/ min
Minimise pauses in compressions
Switch out compressors
management of Shockable rhythm (VF, pVT)
Give shock (biphasic 200J, monophasic 360J)
Continue CPR x 2min
Get IV/ IO access
Epinephrine 1mg q3-5 mins
Consider advanced airway + capnography (if CO2 <10, improve CPR)
Amiodarone 300mg bolus then 150mg second dose
Lidocaine 1mg/kg first dose then 0.5mg/kg second dose
management of non shockable rhythm (asystole, PEA)
IV/ IO
Epinephrine 1mg q3-5 mins
Consider advanced airway + capnography
What are the reversible causes or cardiac arrest?
Hypovolemia
Hypoxia
H+ acidosis
Hypo/hyperkalemia
Hypothermia
Tension PNA
Tamponade
Txoins
Thrombosis - pulmonary, coronary
How to manage ROSC
Maintain O2 sats
Treat hypotension
12 lead ECG ?STEMI - if present, coronary reperfusion
How to manage bradycardia w/ a pulse
Maintain airway
Oxygen if needed
Cardiac monitor
BP + sats
IV access
ECG
Assess for signs of decompensation
What are the signs of decompensation?
Hypotension
Altered mental status
Signs of shock
Ischemic chest discomfort
Acute HF
What to do If decompensation signs are present in bradycardia
Atropine 0.5mg bolus, repeat every 3-5mins, max 3mg
If ineffective, dopamine or epinephrine infusion or transcutaneous pacing
Dopamine 2-20mcg/kg/min
Epinephrine 2-10mcg/min
How to manage tachycardia w/ pulse
Maintain airway
Oxygen if needed
Cardiac monitor
BP + sats
Assess for signs of decompensation
What to do If decompensation signs are present in tachycardia
Consider sedation
If regular narrow complex = adenosine 6mg IV rapid push, 2nd dose 12mg
If wide QRS (>0.12s):
IV access + 12 lead ECG
Adenosine if regular + monomorphic
Antiarrhythmic infusion
Amiodarone 150mg over 10 mins then 1mg/ min for 6 hrs
Procainamide 20-50mg/min until arrhythmia suppressed, hypotension ensures, QRS duration increases >50% or max dose 17mg/kg given
If irregular narrow complex:
IV access + 12 lead ECG
Vagal manoeuvres
BB or CCB
What is the grading of hypothermia?
Systemic cold injury
Mild - 32-35 degrees
Mod - 30-32
Severe - <30
What ix are needed in hospital following a drowning
CXR - localised, perihilar or diffuse pulmonary edema
ABG, lytes, Cr, ECG, continuous core temp monitoring
RF for szs
Fam hx
Cerebrovascular dz
Brain tumors
Alcohol or substance use
Prev head injury
Malformations of cortical development
Infections
Commonly associated conditions w/ szs
Personality disorders
Haem disorders - sickle cell, antiphospholipid syndrome
Learning disabiities
Migraines
Mood disorders
Systemic autoimmune conditions - SLE
Ix for szs
Lytes, glucose, ex lytes, kidney + liver function, ammonia, CBC
UA
Blood + urine toxicology
CT or MRI brain
EEG - may need to do sleep deprived
ECG
Consider spinal tap to r/o infection + raised ICP
Proposed classification of sport categories based on potential risk of injury/ death if sz occurred:
Group 1 (no significant risk to person w/ epilepsy or bystanders)
Athletics, bowling, judo, collective sports on ground (football, soccer, cricket, baseball), XC skiing, dancing, golf, racquet sports
Group 2 (mod risk to person w/ epilepsy but no risk to bystanders)
Alpine skiing, archery, canoeing, karate, cycling, fencing, gymnastics, hockey, swimming, shooting
Group 3 (high risk to person w/ epilepsy or risk to bystanders)
Aviation, climbing, diving, motor sports, rodeo, ski jumping, freestyle skiing, surfing, rodeo, scuba diving
RTP in szs based on classification of sports
One or more acute symptomatic szs
Group 1 permitted, group 2 + 3 at neuro discretion
Single unprovoked sz
Group 1 permitted after neuro assessment, 2 + 3 after 1 yr sz free
Sleep related szs only
Group 1 permitted, group 2 at neuro discretion, group 3 banned
Szs w/o impaired awareness
Group 1 permitted, group 2 at neuro discretion, group 3 banned
What ix are needed in anaphylaxis
Not needed
ABG if ongoing resp distress
Tryptase levels to confirm - must be drawn within 3 hrs of sx onset, must be placed on ice, rarely elevated in food induced anaphylaxis
Consider ECG
RF for post concussion syndrome
4 or more initial sx >1 wk
Prior concussion + sx >1 wk
Sx of drowsiness, nausea, reduced consciousness >1 wk
Sensitivity to light + noise >1 wk
Amnesia associated w/ sx >1wk in males
How does the direction of the blow change the structure likely to be damaged in a nasal bone #?
Blow to inferior nose more likely to injure cartilagenous septum + nasal tip
Lateral blow more likely to # nasal bone, can cause fracture displacement + septal dislocation
Direct blows can lead to nasal obstruction
Low vs high velocity trauma causes what pattern of nasal fracture?
Low velocity trauma causes simple fracture pattern
High velocity trauma causes complex comminuted # and associated injuries to face, head, C spine
Other forms of dental injury other than # + management
Extrusion (tooth moved out of socket) - dentist within 24hrs unless tooth cannot be repositioned, in which case immediate dentist
Intrusion (tooth moved inward) - dentist within 3 hrs
Lateral luxation (tooth moved laterally) - dentist within 24hrs unless tooth cannot be repositioned, in which case immediate dentist
Avulsion - dentist immediately
Complications of dental trauma
Mandibular condyle #s (anterior open bite, malocclusion, limited mandibular opening)
Monitoring in AS
Monitor with BASDAI score (fatigue, spinal pain, joint pain/ swelling, areas of tenderness, duration of morning stiffness) - rated 0-10 then divided by 5. Score >4 = suboptimal treatment
Complications of AS
Fusion of vertebrae leading to restrictive lung disease
Aortitis or aortic insufficiency
Hip arthritis
Increased risk of achilles tendinopathy
RF for AS
Positive fam hx of SpA or HLA-B27
Reactive arthritis triggered by chlamydia or certain enteric infections
Pathophysiology of Spondylosis
Discs undergo desiccation when they age, lose compressibility + bulge causing loss of disc height
Osteophytes form
Ligamentum flavum undergoes hypertrophy
Changes cause narrowing of neural foramen
Pathophysiology of disc herniation
Annular fibers around nucleus pulposus degenerate
Nucleus pulposus can herniate through fibers (usually due to mechanical force)
Herniated disc impacts + compresses nerve root
Where do nerve roots exit compared to their numbered pedicles?
Nerve roots exit above their corresponding pedicle (i.e. C6 nerve root exits between C5 + C6)
Types of scoliosis
Neuromuscular
Congenital
Idiopathic
Tanner stages
Stage 1: no pubic hair, no breast tissue palpable, testicular volume <4ml
Stage 2: downy hair, breast bud palpable under areola, testicular volume 4-8ml
Stage 3: scant terminal hair, breast tissue palpable outside areola, testicular volume 9-12ml
Stage 4: terminal hair that fills entire triangle overlying pubic region, areola elevated above contour of breast, testicular volume 15-20ml
Stage 5: terminal hair extending beyond inguinal crease, areola hyperpigmentation + papillae development, nipple protrusion, testicular volume >20ml or >4.5cm long
DDx for scoliosis
Leg length discrepancy
Postural abnormalities
What is Atlantoaxial Instability?
Increased motion at joint between 1st + 2nd vertebrae
Can e congenital, inflammatory, traumatic or infections that weaken structures leading to it
Sx of Atlantoaxial Instability
Usually asymptomatic
Can present after injury w/ gait changes, progressive weakness, fatigue, neck pain
RF for Atlantoaxial Instability
Downs
RA
JIA
Dwarfism
Marfan’s syndrome
Ix for Atlantoaxial Instability
Lateral cervical XR w/ flexion + extension views
Physical for Atlantoaxial Instability
Hyperreflexia
Sensory changes
Weakness
Gait disturbance
DDx for Atlantoaxial Instability
Neck sprain
Cervical disc herniation
Vertebral #
Management of Atlantoaxial Instability
Restrict from contact sports if symptomatic
If asymptomatic, may be restricted from butterfly stroke, diving, high jump, squat lifts, gymnastics, skiing
Avoid blind ET intubation - use flexible bronchoscope
Can consider atlantoaxial fusion if progressive sx or myelopathy
Most common rotator cuff tears
Supraspinatus + infraspinatus
What is the action of the pectoralis?
Adductor
Internal rotation
Flexor of humerus
RF for Pec Major tendon rupture
Males 20-40 years old
Weightlifting
Steroid use
CTD
Diabetes
MOI Pec Major tendon rupture
Usually complete avulsion of pec tendon at humeral insertion
Downward portion of bench press with shoulder in last 30 degrees of extension against heavy resistance.
Sx of Pec Major tendon rupture
Pain and weakness of shoulder
Will often feel a pop
Physical for Pec Major tendon rupture
Swelling and significant bruising of chest wall and upper arm
Asymmetric pec muscle
Loss of axillary contour - asymmetric muscle outline (retracted medially)
Shoulder ROM limited d/t pain
Dropped nipple sign
Weakness in adduction and internal rotation
Ix for Pec Major tendon rupture
XR to r/o # - soft tissue swelling + loss of pec major shadow seen
MRI w/ dedicated sequence gold standard
US can be helpful in meantime
Management of Pec Major tendon rupture
NSAIDs, ice, sling
Refer to ortho urgently
Partial tears, sternoclavicular tears, muscle belly tears - usually non surgical
Shoulder ROM once tolerated
Strengthening from 6wks post injury
Unrestricted activity 2-3mo after injury
Complete tears = surgical
Acute repair within 3 wks optimal
DDx for Pec Major tendon rupture
Long head bicep subluxation
Proximal humerus #
Rotator cuff tear
Classification of clavicle #s
1 = # of middle ⅓
2 = # of distal ⅓
3 = fracture of proximal ⅓
What is PIN compression syndrome?
Posterior interosseous nerve syndrome
PIN is deep branch of radial nerve
Overuse pronation + supination, trauma (Monteggia or radial head #), inflammatory dz, lipoma/ neuroma/ ganglion
RF for PIN compression syndrome
Manual labourers, body builders, racquet sports
Males
Sx of PIN compression syndrome
Painful spontaneous weakness of extensor muscles
Fatigue during finger extension, elbow supination, wrist extension
Dull, aching pain 5-10cm distal to lateral epicondyle
Physical for PIN compression syndrome
Tenderness on palpation of proximal radius
Sensation normal
Weakness in wrist extension in ulnar deviation but okay in radial deviation
Weak extension of MCP joints
3rd + 4th digits most affected (“rock on” sign)
Ix for PIN compression syndrome
XRs + US
EMG studies
DDx for PIN compression syndrome
Radial nerve palsy
C7 radiculopathy
Lateral epicondylitis
Management of PIN compression syndrome + time frame for recovery
Conservative - rest, NSAIDs, immobilization, steroid shot
Surgery in refractory cases
Activity modification recommendations + home exercises
ROM
Strengthening
Time frame for recovery
3-4mo usually
MOI Elbow dislocation
Wrestling, gymnastics, football, falls, MVA
Conditions commonly associated w/ Elbow dislocation
Radial #, epicondyle avulsion #, coronoid process #
Physical for Elbow dislocation
Visual deformity normally seen
Prominent olecranon = posterior
Long extended forearm = anterior
Ix for Elbow dislocation
AP + lateral XR
Management of Elbow dislocation (sideline + in hosp)
On field reduction
Supine pt, forearm traction, humeral counter traction, anterior force on olecranon, forearm supination
Full passive ROM indicates successful reduction
Post reduction XRs + neurovascular exam
Sling x3 days
If unable to reduce immediately
Immobilize in posterior splint in 90 degrees flexion in pronation
FU XRs 1 + 2 wks after injury
May need surgery if recurrent instability
Time frame for recovery
1-3mo
What is little leaguer’s elbow?
(medial apophysitis)
Catch all phrase for elbow pain in young athlete but traditionally:
Valgus stress lesion of medial epicondylar physis
On a continuum w/ avulsion # of medial epicondyle
RF for medial apophysitis
Pitchers
Number of pitches
Management of medial apophysitis
4-6 wks rest w/ ROM + stretching
NSAIDs + ice
Pitch count
What is Nurse maids elbow?
Traumatic subluxation of radial head by sudden forcible traction on pronated hand or wrist w/ elbow extended
MOI + RF nurse maids elbow
MOI
Child suddenly pulling away or dropping to ground with hand held
Pulling child up or swinging by hand
RF
Kids <4y/o
Sx of nurse maids elbow
Immediate pain
Child not using affected limb
Physical for nurse maids elbow
Arm held in pronated + partially flexed position
Tenderness over radial head
Supination limited
Management of nurse maids elbow
Reduction:
Flexion-supination
Thumb over radial head
Rotate arm into full supination
Flex elbow to 90 degrees
Hyperpronation
Pronate forearm further as elbow is moved into full extension
If function not normal in 15mins, repeat reduction or get XRs
MOI UCL elbow injury
Repetitive valgus overload
Acute trauma (extreme valgus stress)
RF for UCL elbow injury
High velocity throwing or overhead activity sports
Contact sports
Sx of UCL elbow injury
Acute: sudden pain, audible pop
Chronic: persistent, insidious medial elbow pain
Physical for UCL elbow injury
Tenderness along sublime tubercle
Valgus stress test positive
Ix for UCL elbow injury
XRs - joint widening
MRI or MRA
Management of UCL elbow injury
Acute
NSAIDs, rest, ice
High grade partial tears + complete ruptures = surgery (if throwing athlete)
Activity modification recommendations + home exercises
ROM
Wrist flexor + extensor strengthening
Restricted throwing + valgus stress x6 wks
Prevention of UCL elbow injury
Throwing athletes should have 3-4mo rest every year
Conditions associated with scapholunate ligament injury
intra-articular distal radius and other carpal fractures
Levels of scapholunate ligament injury
Occult instability - XR negative, wrist pain usually only w/ mechanical loading
Dynamic instability - will be evident on stress XRs
SL dissociation - SL widening seen on XR
SL advanced collapse (SLAC)
MOI lunate dislocation
FOOSH
high energy injury that occurs when wrist is in extension and ulnar deviation.
RF for lunate dislocation
Chronic crutch walkers
Gymnasts, football, collision sports
Sx of lunate dislocation
Dorsal wrist pain
Decreased grip strength
Decreased ROM
May have carpal tunnel symptoms (25%)
Physical for lunate dislocation
Wrist effusion in acute injuries
Tenderness to palpation of lunate + radial aspect of wrist
May have positive median nerve compression tests, as lunate can dislocate into the carpal tunnel
Finger extension test positive - hold wrist in flexion, test active finger extension against resistance - pain over lunaate
Kleinman shear stress test positive (lunotriguetral instability) - wrist in neutral position, examiner’s contralateral thumb over dorsal lunate while ipsilateral thumb loads the pisotriquetral joint with a dorsally directed force - pain = positive
Ix for lunate dislocation
X-rays: PA, oblique, and lateral wrist inc clenched fist view
Gap >3mm / increased gap compared to contralateral side
CT for ligament injuries
Arthroscopy is gold standard
DDx for lunate dislocation
Scaphoid fracture
Colles fracture
Scaphoid impaction syndrome
Dorsal wrist ganglion cyst
Other carpal bone injury
Complications of lunate dislocation
AVN
median nerve palsy
compartment syndrome and long term issues.
Management of lunate dislocation
Urgent reduction and surgery needed then prolonged immobilization
Partial tears can be treated conservatively w/ splinting
Refer to ortho/ plastics emergently
Zones of flexor tendons in hand
Zone 1: distal to FDP insertion (FDP tendon only)
Zone 2: proximal A2 pulley to FDS insertion (no man’s land - poorer outcomes)
Zone 3: distal carpal tunnel to proximal A2 pulley (contains lumbricals)
Zone 4: carpal tunnel (contains flexors + median nerve)
Zone 5: Proximal to carpal tunnel (different repairs if muscle belly involved)
Zones of extensor tendons in hand
Zone 1: DIPJ (mallet injury)
Zone 2: middle phalanx (can involve central slip insertion)
Zone 3: PIPJ (Boutonierre deformity)
Zone 4: Proximal phalanx (can involve central slip + lateral bands)
Zone 5: MCPJ (can involve sagittal band + joint capsule)
Zone 6: metacarpals (distal to junctura (tendon can retract))
Zone 7: wrist joint (involvement of extensor retinaculum)
Zone 8: distal ⅓ of forearm (can involve musculotendinous junction)
Zone 9: proximal ⅔ of forearm (can involve muscle belly)
What is IP collateral ligament strain + degrees of severity
Injury to a collateral ligament at the interphalangeal (IP) joint of the finger, usually the proximal interphalangeal (PIP) joint:
1st degree: pain but no laxity
2nd degree: pain and laxity but firm end point when ligament is stressed
3rd degree: pain and loss of firm end point when ligament is stressed
MOI + RF IP collateral ligament strain
MOI
axial loading with radial or ulnar stress applied to the finger, usually while extended
RF
Ball handling, collision, and contact sports: football, basketball, volleyball, wrestling
Prior injury or dislocation of the PIP joint
Sx of IP collateral ligament strain
Finger struck by player or ball during play
Axial trauma causing forced ulnar or radial deviation
Usually presents acutely but may become chronic
Physical for IP collateral ligament strain
Pain and swelling over radial or ulnar aspects of PIP joint
Decreased range of motion (ROM) secondary to pain and edema
Assess function of flexor and extensor tendons by isolating MCP, PIP, and distal interphalangeal (DIP) joints separately to rule out tendon injury.
Loss of active ROM may be due to either pain or volar plate/central slip injury, so digital block may be necessary to test ROM
DDx for IP collateral ligament strain
Phalangeal fracture
IP dislocation
Central slip injury
Volar plate injury
Management of IP collateral ligament strain
Buddy tape for 3 wks
Surgery if:
Displaced intra-articular
Large avulsion #
Instability w/ active ROM
Tissue interpoisition limiting ROM
FU 1-2 wks to r/a
What is Climbers finger?
Flexor tendon pulley rupture (especially A2 and A4)
Manage with splints or surgical pulley reconstruction
What does dysplasia, subluxation, dislocation, teratologic dislocation + unstable hip mean in relation to the hip
Dysplasia refers to an acetabulum that is shallow or underdeveloped.
Subluxation refers to a femoral head that is not centered within the acetabulum.
Dislocation refers to a femoral head that is completely out of the acetabulum.
Teratologic dislocation refers to a femoral head that is in a fixed dislocated position usually associated with a genetic, developmental, or neuromuscular disorder.
An unstable hip refers to a femoral head that can be subluxed or dislocated on physical examination.