Clinical Medicine Exam 1 MSK Flashcards
Grades of sprains I,II,III
I = Partial tear but no instability of joint
II = Partial tear with some instability and laxity of joint
III = Complete Tear with laxity and instability of joint
Open fracture anitbiotics
IV antibiotics (Usually 1st-2nd generation cephalosporins and aminoglycosides should be administered 48 hours after fracture and for 48 hours after surgery.
Long bone ends are also known as
Proximal and distal
Epiphysis
Osteosarcoma
common malignant bone tumor
children & adolescents
Distal femur most common site, followed by proximal tibia and then proximal humerus.
pain before tumor is noticed
xray then MRI
Chemo, surgery (amputation is rare)
osteoarthritis
stiffness lasting less than an hour
crepitus
Females, age
asymmetry
Bouchards / Heberdens node
nsaids, rice, steroids, bracing, exercise
Rickets
Due to a lack of vitamin D or calcium and from inadequate sunlight exposure, which destroys normal bone growth.
This primarily occurs in children
Laminectomy –
most common, removal of lamina, bone spurs
Spinal stenosis
Juvenile RA
females 2 to 1
unknown cause
autoimmune
criteria = under 16 arthriris for 6 weeks exclusion of other arthritis 5 joints or more
nsaids
methotrexate
PT/OT
torticollis
Neck tilt in infants (injury if adult)
can be from illness or injury
May be caused by sternocleidomastoid muscle contracture
Head will tilt toward side of contracture
May follow URI or mild trauma in children
Spinal cord tumor, RA other etiologies
stretching
Jones Fracture
junction of the metaphysis and diaphysis of the proximal end of the 5th metatarsal
Untreated risks Avascular necrosis
restand to preventmovementin the foot.
surgerymay be needed
Subluxation
Partial or incomplete misalignment of bones and joints
5 P’s of compartment syndrome
5 P’s
Pain
(late findings) Pallor Pulselessness Parasthesia Paralysis
Long bone shaft is also known as
Diaphysis
Pediatric bones (Fx)
Young skeletal bone is much more flexible than mature adult bone
The bones will bend, buckle before they break
Adhesive capitus
Frozen shoulder
Build up of scar tissue resistricts the movement inside the joint
(GH joint) (between humeral head and socket)
this results in pain and severe ROM decrease
Endosteum
inner layer of medullary cavity
also has layer of cells that breakdown and dissolve bone cells for reabsorption
Pediatric Fx
Greenstick (Surgeon for greater thatn 15 degrees)
Salter Harris types 1-5
Heberdens node
Bony lumps in the distal joint of phlange (DIP joint)
can cause pain and inflammation
Nutirent foramina
minute holes in bone surface that allows blood vessels to penetrate
Rhabdomyosarcoma
more than half of the soft tissue sarcomas in children
most typical in head and neck
Very uncommon in adults
Orbital RMS may present with pain in eye, orbital swelling, bulging of eye.
can mask as URI in nose and mouth
Surgery
Fibromyalgia
women 20-55
No specific tests.
all the problems!
Rule out Differential diagnosis (Hypothyroidism, Hep C, Vitamin D deficiency)
psych meds, ssri, gaba, meditation
Nerve conduction velocity test
Test to diagnose carpal tunnel syndrome
Osteoporosis
Primary vs secondary
Primary =
more common, age related
Type 1 = due to decrease in estrogen
type 2 = lack of Vitamin D3
Secondary = Result of other diseases that cause bone loss medications hyperparathyroidism alcohol smoking
Calcium, vitamin D phosphorus, fosamax
Nursemaids elbow
Radial head subluxation
“Pulled elbow”
Usually due to a pull and twist
Sudden acute pain
Child refuses to move arm
On exam, child will be holding arm in slight flexion and pronation
No swelling or tenderness to palpation
HOWEVER – significant tenderness elicited with pronation/supination of the forearm
Sprain
Stetched or torn ligament
Radial Neck Fracture
FOOSH
Typically unstable
This is a fracture that is best NOT immobilized
due to possible loss of ROM
Septic arthritis
Inflammation of a synovial membrane with purulent effusion into the joint capsule, due to infection
Knee mostly
IV drugs, bacterimia, diabetes, RA joint surgery, HIV
Infection symptoms
Antibiotics (vanc, cef)
olecranon bursitis
Students elbow
Enlarged bursa in elbow (point of elbow)
Swelling, pain
ROM not really affected
RICE
Outer layer of long bone is made up of
Compact bone (osteons)
Grade III Strain
III = Tear all muscle fibers, fascia still intact
Pain with weakness and loss of function
Low back pain
Usually prolapsed intervertebral disk and low back strain or Sciatica
Imaging not usual initially
nsaids, rest, PT/OT, fitness
surgery last resort
Fx complications
Hemorrhage DIC Neurologic injury Vascular injury Compartment syndrome
RA Treatment
PT/OT nsaids methotrexate steroids sulfa antimalarials
Gout
Podagra (big toe gout) small joints (toes, ankles, wrist, fingers) earlier in men, Rare in childhood Meat seafood beer worsen red, swollen, tophi
negatively birefridgerantly needle shaped crystals
RICE, nsaids, colchicine, steroids, indomethacine
no thiazides or ASA
Grade III Sprain
III = Complete Tear with laxity and instability of joint
Protected motion, possible, likely repair needed
Articular cartilage
layer of hyaline cartilage that covers joint surface
allows the joint to move moe freely
(at the ends of long bones) (covers the “head”)
Ortho Emergencies
Knee dislocation with vascular compromise (not patella)
Amputation
Spinal fracture
Open fractures
Foraminotomy -
decompression allowing room for nerve root exit
Spinal stenosis
Grade I Strain
I = Tear a few muscle fibers with fascia intact
Pain, very little weakness or loss of function
Bouchards node
Bony lumps in the second distal joint of phlange (middle joint or PIP)
can cause pain and inflammation
Common Type of ankle x ray
AP
Lateral
Mortise
Oblique
Kyphosis
Humpback, curve of spine
Congenital, traumatic or acquired
Fracture Blisters
Occur on overlying skin due to swelling
Appear as early as 6 hours post injury
Usually clear fluid – if hemorrhagic, worse prognoses
Femur Neck “surgical neck” (Hip Fx)
Thinnest, most fragile part of the femur Very common (blood supply can be interuppeted) avascular necrosis can occur usually surgical
Cartilage injury treatments
Steroid injection
Glucosamine
Hyaluronic acid
Rheumatoid arthritis
is a chronic autoimmune disease characterized by an inflammatory polyarthritis that preferentially affects the small joints.
Anti-cyclic citrullinated peptide (anti-CCP or ACPA) is more specific and 95% of patients. Low in early disease.
Erythrocyte Sedimentation rate (ESR) and C-reactive protein are elevated.
RF is positive in 80 of patients but nonspecific
Multiple myeloma
Most common primary tumor of bone
45% of all bone tumors
over 40
Bone pain, increased protein, anemia, hypercalcemia, acute renal failure
“punched out” lesions on imaging
Hip Fx
2 types
Intertrochanteric Fracture
Area between the greater and lesser trochanters
(blood supply ususally intact)
Femur Neck “surgical neck”
Thinnest, most fragile part of the femur
Very common
(blood supply can be interuppeted)
Comminuted Fx
Comminutedfractures have > 2 bone fragments.
Comminuted fractures include segmental fractures (2 separate breaks in a bone).
i.e. shattered
Medial Epicondylitis
Medial = golfers elbow
Pain on inside of elbow
repetitive stress
MRI useful
surgery rare
osgood schlatter disease
inflammation and pain below patella
relieved by rest
patellar tendon pulls on growth plate of tibia repeatedly
imaging not necessary
self limiting once growth plate ossifies
Nsiads, RICE
pediatric disease
overuse injury
What accelerates the loss of bone mass in osteoporosis
gonadla steroid deficiency
estrogen deficiency in postmenopausal women
(lower bone mass than men)
Men can experience this too
Lewy bodies
Lewy bodies are a characteristic feature present in the brains of patients with Parkinson’s disease and Lewy body dementia.
Mechanisms of injury in musculoskeletal
Repetitive stress/injury
Stress fractures
ie shin spints
Anterior should dislocation
Most common joint dislocation,
95% of dislocations
loss of rounded appearance of shoulder
Segmented Fx
Segmental fractures are broken completely into seperate pieces
i.e. an island
Common Type of Hip x ray
AP hips
Frog Leg
Where is yellow bone marrow located
Medullary cavity on diaphysis or shaft of long bone
Spinal fusion –
reserved for patients with radicular pain, or unstable spine and other options have not been effective. Long recovery.
Spinal stenosis
Open Reduction Internal Fixation (ORIF)
Open Reduction Internal Fixation (ORIF) – surgical procedure with use of plates, rods, screws, pins, staples.
talipes equinovarus
club foot
internal rotation of foot
contracted achilles tendon (plantar flexion)
Osteoarthritis details
Osteoarthritis
Articular cartilage softens and degenrates
Bone spurs can develop
Cracking and crepitus
progressive loss of cartilage
Schleroderma clinical presentation
CREST
Calcinosis (Calcium deposits in skin)
Raynauds
Esophageal dysfunction
Sclerodactyly (thickend collagen on fingers)
Telangiectasias (dilation of capillaries on skin) (redness)
Oblique Fx
Obliquefractures occur at an angle.
Spondylolysis
fracture of the pars interarticularis
Schistocytes
Schistocytes are fragmented pieces of red blood cells. These are commonly found in patients with hemolytic anemia or microangiopathic diseases, such as disseminated intravascular coagulation.
Bone repair process
Osteoblasts seek out microcracks
They then secret RANKL
RANKL binds with monocytes
This causes them to form osteoclasts
Osteoclasts secrete enzymes (dissolves and creates holes in bone
This causes the hydroxyapatite to break down in calcium and phosphate releasing it into the blood
Osteoblasts then begin to secrete osteoprogenrin that deactivates RANKL
This slows the osteoclast activity
Calcium and phosphate deposit on the seams, some osteoblasts get trapped in the lacunae and turn into osteocytes
Avascular necrosis
Osteonecrosis
blood supply is cut off
Bone & tissue die
MRI without a contrast agent continues to be the “gold standard
4 Fracture repair steps
hematoma
fibrocartilaginous callus forms
Bony callus forms
Bone remodeling
Osteopenia
bone density has decreased but is not considered dangerous yet
precursor to osteoporosis
Laminoplasty –
lamina removed, plates and screws replace
Spinal stenosis
Spongy bone
At the ends of long bone
epiphysis
and metaphysis
lattice of bone
slivers of bone called spicules
thin plates of bone call trebeculae
spaces filled with red marrow
very few osteons (no central canals)
provides strength with minimal weight
How to counteract aging process
Exercise and stretching
much is the result of being sedintary and under use
Grade I Sprain
I = Partial tear but no instability of joint
Symptomatic treatment only
Polyarteritis nodosa (PAN)
Virus caused
Skin lesions-palpable purpura, and livedo reticularis
Fever, anorexia, weight loss, abd pain, peripheral neuropathy, arthralgias, HTN, edema, uremia, oliguria
HEp b antigen, ESR & CRP elevated, proteinuria
steroids, cytotoxic drugs
10-20% die (GI / CV issues)
Colles Fracture
distal end of radius with dorsal angulation
FOOSH Most common type
Pseudogout
large joints
not uric acid (calcium pyrophosphate crystals)
Painful, red, swollen but no tophi
Rhomboid shaped crytals positively birefridgerant
RICE, nsaids, colchicine, steroids, indomethacine
Impacted Fx
impactedfractures, bone fragments are driven into each other, shortening the bone;
these fractures may be visible as a focal abnormal density in trabeculae or irregularities in bone cortex.
Sarcopenia
Age related Muscle loss
Reduced satellite cells loss of muscel mass increased adipose tissue fiber types transition from fast toslow twitch fibers reduced number of mitochondria calcium deficits/release
Boxers Fx
distal 3rd of the 5th metacarpal
Osteoporosis bone density measurements**
Standard deviations from the mean for young adults
DEXA Scan
Normal = 1 or less
Osteopenia = between 1 & 2.5
Osteoporosis = more than 2.5
Severe osteoporosis = more than 2.5 w/ Fx
Synovial joint accessory structures
Bursa
-fibrous sac filled with synovial fluid
Tendon sheath
-elongated cylindrical bura wrapped around a tendon
Meniscus
-moon shaped cartilage in the knee
Viewing imaging
Systematic Approach to Radiograph
ID patient and right/left
Bone and Joint Alignment
Joint spaces
Cortical outline
Bone texture
Soft tissues
Immobilization complications
DVT Infection PE Muscle atrophy Psychiatric disorders
Geriatrics are increased risk
4 stages of gout
1 High uric acid levels
2 Acute gout
3 intercritical gout (remission periods)
4 Chronic gout
Giant cell tumors of bone
Many types
females, 3rd decade
knee, distal radius, sacrum
large effusion, painful
surgery
Type A and B Cells in joints (osteoarthritis)
Type A = clears debris
Type B = produce components of synovial fluid
Fracture Healing Steps (4)
Hematoma formation
Soft callus forms
Hard callus forms
Bone Remodeling
Metabolic syndrome
Elevated
BP, Blood sugar, Chloesterol
increased body fat around waist
Ankylosing Spondylitis
Chronic inflammatory disease of the axial skeleton
human leukocyte antigen (HLA)- B27 surface antigen found in 88 to 96% of patients.
It is thought that the combo of this antigen and an exogenic component (Klebsiella or Chlamydia) trigger disease process
Imaging = bamboo spine
30 degree forward lean (posture)
nsaids, bracing, swiming PT for posture
may need surgery
What does the inorganic matter in bones do
it causes the bones to harden
in children this is called ricketts
in adults it can be osteomalcia
without it you end up with soft bones
reactive arthritis
Reiters syndrome (rare)
Can’t see, cant pee, cant climb a tree
vision (conjunctivitis), urinary issues, arthritis
STI of Chlamydia urethritis or gastroenteritis
HLA-b27 antigen 80% positive
PT, nsaids, antibiotics
7 types of fractures
Stable Open, compund Transverse Oblique Comminuted Compression Stress
Structural Joint types
Fibrous
3 fibrous are suture, gomphosis, syndemosis
Cartilaginous
synchondroses (connected by hyaline cartilage) ribs and sternum
and
symphyses (connected by fibrocartilage) ie intervertebral discs
Synovial
Schirmers test
filter paper is placed inside lower eyelid
eyes closed for 5 mins
paper is then measured for moisture
Carpal Tunnel Syndrome
Median neuropathy
Compression of median nerve as it crosses under the flexor retinaculum at wrist
Tinel test, phalen sign
nsaids, splinting, may need surgery
Bruxism
Teeth grinding
Descriptions of fractures
Location Direction Alignment Open vs closed Displaced