Musculoskeletal Lower Extremity Flashcards
Important factors that can point you toward a differential diagnosis
. Chief complaint
. Age
. Biological sex
. Vital signs
Septic joint
. Acute onset of mono articular joint pain, erythema, heat, and immobility
. Fever, chills rigor
. Failure to start antibiotics in first 24-48 hrs causes subchondral bone loss and permanent joint dysfunction
Most common route of entry in a joint for infection
. Contiguous, direct inoculation, and hematogenous
Risk factors for contiguous spread of infection in joint
. Cellulitis . Cutaneous ulcers . Osteomyelitis . Septic bursitis . Abscess
Risk factor for direct inoculation of joint infection
. Previous intraarticular injection . Prosthetic joint . Recent surgery . Arthrocentesis . Trauma
Risk factors for hematogenous spread in joint infection
. DM . HIV . Bacteremia . Immunosuppressive meds . IV drug abuse . OA
Synovial fluid analysis
. Helpful to distinguish crystal arthropathy from infectious arthritis
. Synovial fluid sent for WBC count (usually over 50,000 per mm3)
. Isolation of causative agent of sepsis is essential for selecting antibiotic therapy
Arthalgia
. Joint pain
. Discomfort form w/in or surrounding joint
What to inspect for in musculoskeletal examination
. Joint symmetry, alignment, or bony deformities
. Surrounding tissues for skin changes, nodules, muscle atrophy, or crepitus
. Assess any degenerative or inflammatory changes, especially swelling, warmth, tenderness, or redness
Psoas syndrome
. Muscular strain, spasm, or flexion contracture
. Caused from being in position that allows prolonged shortening of psoas following sudden lengthening (desk work, road trip, trauma)
. Stooped posture, back/butt pain
. Tests: pos. Thomas test, non-neutral upper lumbar somatic dysfunction
Trendelenberg sign
. Weak abductor
. Could be caused by bone length, position (internal/externally rotated), gross deformity
Iliac crest anatomical landmark
L4
Pubic tubercle anatomical landmark
. Find greater trochanter then move thumbs medially at same level as trochanter
Antalgic
. Shortened stance phrase on affected side
Important bony structure to palpate on lower extremity exam
. Joint line
. Paella
. Tibial tubercle
Soft tissue structures to palpate in lower extremity exam
. Pes anserine bursa . Patellar tendon . Quad tendon . Iliotibial band . Collateral ligaments
Patellar tendon tear results from ___
. Direct impact from a fall/blow and jumping
. Patellar tendinitis
. Chronic disease
. Steroid use
Patellar tendon tear symptoms
. Tearing/popping sound . Pain, swelling . Unable to straighten knee . Indentation where tendon tore . Displacement of patella . Difficulty walking due to knee buckling
Ankle sprain
. Inversion sprains 75% of the time
. Occur in plantar flexion most of the time (dec. ankle stability because ant. Aspect of talus is no longer wedged btw malleoli increasing mobility)
Spine
. Central supporting structure of trunk and back
. Can cave curves of cervical spine and lumbar spine
. Convex curves of thoracic and sarcococcygeal spine
. Help to distribute body weight to pelvis and lower extremities
Cervical lordosis
Abnormal straightening of the concavity
Thoracic hyperkyphosis
Hyper-convexity of thoracic curvature