Osteoporosis Flashcards

1
Q

What vaccines should a 62 year old need?

A

Flu, Tdap q10 years, zoster (ages 50+), covid. If 65+, one dose of pneumococcal 20 or pneumococcal 15 + pneumococcal 23 1 yr later.

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2
Q

What are risk factors for osteoporosis?

A
  • Age
  • white race
  • parental hx of hip/spine fracture
  • BMI <20
  • smoking
  • RA
  • excessive alcohol use (>3 drinks/day)
  • steroids
  • inadequate physical activity
  • estrogen deficiency
  • gastric bypass (malabsorption)
  • thyroid disease.

Drugs: anticonvulsants, steroids, TPN, aromatase inhibitors, lithium, long-acting progesterone.

Others: GI (celiac, gastric bypass, eating disorders), endocrine (thyroid), heme (SCD), ID (HIV), Pulm (COPD)

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3
Q

What is the definition of osteoporosis?
What is the workup?

A

T-score < -2.5 or fragility fracture (falling from less than standing height) regardless of T-score.
1st line bisphosphate (5yr only bc risk mandible osteonecrosis).
Treat if prior fragility fracture, T-score < -2.5.

Workup: CBC, CMP (including calcium, Mag, LFTs), 25-OH Vit D3 level, 24hr urine calcium, TSH. If excluding secondary causes: PTH.

  • peak bone mass at age 18-21.
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4
Q

What is the definition of low bone mass?

A

Formerly osteopenia. T score between -1 and -2.5

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5
Q

How do you diagnose osteoporosis?

A

DEXA scan if >65. If <65 and RF, 10yr FRAX risk >8.4%, then get DEXA.

Scan should be of central bones (hip and spine).
Repeat q2yr unless new risk factors
If treatment: q1-3 yrs until stable.

Tx: non-pharmacologic and pharmacologic options!!
- prescribe calcium, vit D, weight bearing exercises, fracture/fall prevention

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6
Q

What is a T-score?

A

standard deviations from mean peak bone mineral density compared to young, healthy population.

Z-score: standard deviations from reference population of same AGE, SEX, AND RACE. Useful for premenopausal women (UNDER 35) at risk for secondary causes of osteoporosis. Z score < 2.0 needs evaluation.

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7
Q

Contraindications to bisphosphonates?

A

Esophageal disorder, CKD, gastric bypass.

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7
Q

Mechanism of action of bisphosphonates?
What are side effects?

A

Inhibits bone resorption via action on osteoclasts.
eg. Aledronate=1st line. 10mg daily.

SE: muscle pain/aches, GI irritation, osteonecrosis of jaw.

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8
Q

What calcium/Vit D recommended daily allowance should the patient be taking?

A

Not effective for osteoporosis prevention.
Calcium 1000 mg. or 1200 mg/day if 50+. Average diet contains ~800. supplements incr risk kidney stones and don’t reduce fracture risks.
Vit D is 600mg or 800 if 70+

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9
Q

What are the types of medication to treat osteoporosis?
When do you treat osteoporosis?

A

Anti-resorptive (bisphosphonates, RANK-L inhibitor, SERM, calcitonin) and anabolic (if very high risk fracture): PTH-analog, sclerosin-binding inhibitor.

Treat if T score <-2.5 OR T score <1.0 (LBM) and FRAX score >3% hip or >20% major fx OR hx fragility fracture (regardless of T-score).

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10
Q

What is normal bone loss?

A

pre-menopausal: 0.5% per yr
post-menopausal: 5% per year.

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11
Q

What is a FRAX?
What factors are included in FRAX assessment?

A

fracture risk screening tool for women >40, predicts fracture risk in next 10 yrs.

What is included in FRAX: age, sex, BMI, prior fracture, parental hx, current smoking, alcohol, steroid use, RA.

  1. Use to determine if pt w/ low bone mass needs tx: if FRAX >3% hip fracture of >20% major fracture
  2. Use to determine if pt <65 w/ risk factors should get DEXA. if FRAX >8.4%, get DEXA

Limitations: doesn’t include hx recent falls or quantify risk for smoking/alcohol/meds.

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12
Q

What are anti-resorptive treatments (besides bisphosphonates)?

A

HRT: only use if other options fail.

SERM (raloxifene): pro-estrogen on bone and uterus, anti-estrogen in breast. reduces fracture rate and breast cancer rate by 50%. use if woman in 50s!! - incr risk VTE!!!!
bc bisphosphonate can only be on for 5 years!

Calcitonin: 200 IU/day nasal spray or subs. rarely used. incr risk malignancy.

rank-ligand inhibitor: denosumab (monoclonal Ab): subQ q6mo, incr vertebral fracture and bone loss w/ discontinuation. Better for higher risk of fractures. BLACK BOX for int risk hypocalcemia w/ CKD.

Zoledronic acid (IV yearly): give pt pt non-compliant with bisphosphate PO or contraindications to oral bisphosphonates! for 3 yrs.

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13
Q

What are anabolic therapies?

A

PTH-analog (abaloparitide) tx of very high fracture risk. avoid if hypercalcemia and incr risk osteosarcoma.

Sclerostin inhibitor: tx of high fracture risk. monoclonal Ab: avoid if hypocalcemia, hx MI/stroke.

“very high risk” : T score < -3.0 or <2.5 w/ fracture in past yr, or multiple fractures.

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14
Q

What are causes of height loss?

A

aging
osteoporosis
hyperPTH
osteomalacia
herniated disc
vertebral fracture
degeneratie disc disease
scoliosis, kyphosis

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15
Q

What meds can cause osteoporosis?
What are causes of osteoporosis:

A

ABCD!
A=anticoagulant, anticonvulsant, aromatase inhibitors
B=barbiturates
C= chemotherapeutic drugs
D=depo

Other causes:
GI: IBD, gastric bypass, celiac
Genetic: CF, OI
endocrine/heme: DM, thyroid
Heme: hemophilia
Hypogonad: anorexia, klinefelter, primary ovarian failure
Lifestyle: smoker, thin, chronic steroids

16
Q

What to do if pt not improving w/ treatment for osteoporosis?

A
  • check for medication compliance

eval for secondary causes:
- metabolic profile, 24hr urine calcium, 25-hydroxy Vit D, TSH, celiac panel, serum protein electrophoresis (r/o multiple myeloma)

17
Q

What is differential and tx for GERD?

A

Differential: GERD, infectious esophagitis, pill and eosinophilic esophagitis.

Tx: 1st line lifestyle and dietary modification (weight loss, elevated hOB, avoid meals 2-3 before bedtime), eliminate triggers.

Meds:
- H2 blockers=pepcid (famotidine)
- PPI: if fail H2 blocker (omeprazole) - can incr absorption and cause kidney disease if long-term use.

18
Q

What is hormone therapy indicated for?

A

mod-severe vasomotor sx
Vaginal dryness
prevent early osteoporosis bone loss

women who start HR < age 60 and <10 yrs from onset of menopause have no increased risk of CVD and benefits outweighs risks
- transdermal estrogen
- oral micronized progesterone
- oral provera: increases breast cancer + lipids