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Osteoporosis Definition PowerPoint Presentation

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Slide 1 - Osteoporosis An Inpatient Topic? July 2006
Slide 2 - Background The problem Osteoporosis is common Over 50% of women and 30-45% of men over age 50 have osteopenia/osteoporosis White woman over age 50: 50 % lifetime risk of osteoporotic fracture, 25% risk vertebral fracture, 15% risk of hip fracture Man over age 60 has 25% risk osteoporotic fracture 70% over age 80 have osteoporosis
Slide 3 - Background Hip fractures are bad 20% patients with hip fracture die within the year 25-30% need placement in skilled nursing facility
Slide 4 - Why is this an inpatient topic? Older patients have frequent admissions and increased length of stay, increasing possible points of contact Patients from nursing facilities, those at greatest risk, may have little continuity Discharge medications for patients going to skilled nursing facilities can have LARGE impact Study: Only 6% of patients admitted with hip fracture to a tertiary care hospital were adequately treated for osteoporosis at discharge, only 12% at 5 years! Another study: only 21% medicare beneficiaries with hip fracture had any prescription treatment; patients older than 74 and those with other comorbidities were least likely to receive treatment
Slide 5 - What is Osteoporosis? Loss in total mineralized bone Disruption of normal balance of bone breakdown and build up Osteoclasts: bone resorption, stimulated by PTH Calcitonin: inhibits osteoclastic bone resorption Major mechanisms: Slow down of bone build up: osteoporosis seen in older women and men (men after age 70) Accelerated bone breakdown: postmenopausal Normal loss .5% per year after peak in 20s Up to 5% loss/year during first 5 years after menopause
Slide 6 - Defining Osteoporosis “systemic skeletal disease characterized by low bone mass and microarchitectural deterioration of bone tissue, leading to enhanced bone fragility and a consequent increase in fracture risk” True Definition: bone with lower density and higher fracture risk WHO: utilizes Bone Mineral Density as definition (T score <-2.5); surrogate marker
Slide 7 - Who Gets Osteoporosis? Age Estrogen deficiency Testosterone deficiency Family history/genetics Female sex Low calcium/vitamin D intake Poor exercise Smoking Alcohol Low body weight/anorexia Hyperthyroidism Hyperparathyroidism Prednisone use Liver and renal disease (think about vit d synthesis) Low sun exposure Medications (antiepileptics, heparin) Malignancies (metastatic disease; multiple myeloma can present as osteopenia!) Hemiplegia s/p CVA/ immobility
Slide 8 - Diagnosing Osteoporosis Outcome of interest: Fracture Risk! Outcome measured (surrogate): BMD Key: Older women at higher risk of fracture than younger women with SAME BMD! Other factors: risk of falling, bone fragility not all related to BMD Osteoporosis: disease of bone that increases risk of fracture; more than BMD goes into causing a fracture; BMD is important, but in reducing fractures must also consider falls risk, age and other factors!!!
Slide 9 - Diagnosing Osteoporosis Laboratory Data Limited value in diagnosis Markers of bone turnover (telopeptide) more useful in monitoring effects of treatment than in diagnosis Helpful to exclude secondary causes Hyperthyroidism Hyperparathyroidism Estrogen or testosterone deficiency Malignancy Multiple myeloma Calcium/Vitamin D deficiency
Slide 10 - Methods to evaluate for osteoporosis Quantitative Ultrasonography Quantitative computed tomography Dual Energy X-ray Absorptiometry (DEXA) ?”gold standard” Measurements vary by site Heel and forearm: easy but less reliable (outcome of interest is fracture of vertebra or hip!) Hip site: best correlation with future risk hip fracture Vertebral spine: predict vertebral fractures; risk of falsely HIGH scores if underlying OA/osteophytes
Slide 11 - How to interpret the BMD T score: standard deviation of the BMD from the average sex matched 35-year-old Z score: less used; standard deviation score compared to age matched controls WHO: Osteoporosis: T score <-2.5 Osteopenia: T score -1 - -2.5 For every 1 decrease in T score, double risk of fracture 1 SD decrease in BMD = 14 year increase in age for predicting hip fracture risk Regardless of BMD, patients with prior osteoporotic fracture have up to 5 times risk of future fracture!
Slide 12 - Fracture Reduction Goal: prevent fracture, not just treat BMD Osteoporosis treatment options Calcium and vitamin D Calcitonin Bisphosphonates Estrogen replacement Selective Estrogen Receptor Modulators Parathyroid Hormone
Slide 13 - Osteoporosis Treatment: Calcium and Vitamin D Fewer than half adults take recommended amounts Higher risk: malabsorption, renal disease, liver disease Calcium and vit D supplementation shown to decrease risk of hip fracture in older adults 1000 mg/day standard; 1500 mg/day in postmenopausal women/osteoporosis Vitamin D (25 and 1,25): 400 IU day at least; Frail older patients with limited sun exposure may need up to 800 IU/day
Slide 14 - Osteoporosis Treatment: Calcitonin Likely not as effective as bisphosphonates 200 IU nasally/day (alternating nares) Decrease pain with acute vertebral compression fracture
Slide 15 - Osteoporosis Treatment: Bisphosphonates Decrease bone resorption Multiple studies demonstrate decrease in hip and vertebral fractures Alendronate, risodronate IV: pamidronate, zolendronate (usually used for hypercalcemia of malignancy, malignancy related fractures, and multiple myeloma related osteopenia) Ibandronate (boniva): once/month Those at highest risk of fracture (pre-existing vertebral fractures) had greatest benefit with treatment
Slide 16 - Bisphosphonate Associated Osteonecrosis (BON) Jaw osteonecrosis Underlying significant dental disease Usually associated with IV formulations Case reports associated with oral formulations
Slide 17 - Bisphosphonates: Contraindications Renal failure Esophageal erosions GERD, benign strictures, most benign GI problems are NOT a contraindication Concern for esophageal irritation/erosions from direct irritation, recommendations to drink water after and not lie down at least 30 minutes Reality: no increased GI side effects compared to placebo group in multiple studies
Slide 18 - Osteoporosis Treatment: Estrogen Replacement Reduction in bone resorption Proven benefits in treatment FDA approval, now limited because of recent concerns from HERS trial and other data suggesting possible increased total risks with HRT (?increased cardiac risk, increased risk VTE, increased risk cancer)
Slide 19 - Osteoporosis Treatment: Selective Estrogen Receptor Modulators Raloxifene FDA recommended Decrease bone resorption like estrogen No increased risk cancer (decrease risk breast cancer) Increase in vasomotor symptoms associated with menopause
Slide 20 - Osteoporosis Treatment: PTH Teriparatide Why PTH when well known association with hyperparathyroidism and osteoporosis??? INTERMITTENT PTH: overall improvement in bone density Optimal bone strength relies upon balance between bone breakdown and bone build up; studies with increased density but increased fracture risk/fragility with flouride show that just building up bone is not enough!!!
Slide 21 - Intermittent PTH: Teriparatide Studies suggest improved BMD and decreased fractures ?risk osteosarcoma with prolonged use (over 2 years): studies with rats SQ, expensive Option for severe osteoporosis, those on bisphophonates for 7-10 years, those who can not tolerate oral bisphosphonate Optimal effect requires bone uptake Not for use in combination with Bisphosphonate! May need to stop bisphosphonate up to 1 year prior
Slide 22 - Reducing Fractures 1. Decrease osteoporosis/improve BMD 2. Decrease risk of break: hip protectors 3. Decrease risk of fall
Slide 23 - Hip Protectors Padding that fits under clothing Multiple studies demonstrate effectiveness at preventing hip fractures Likely cost effective Problem: adherence!
Slide 24 - Falls Reduction Falls are a marker of frailty Hip fracture is a marker of frailty Mortality after hip fracture:?due to hip fracture or hip fracture as marker for those who are declining? Increased risk of falls: Prior fall (fear of falling) Cognitive decline Loss of vision Peripheral neuropathy Weakness Stroke Medications: anticholinergics, tcas, benzos… ETOH
Slide 25 - Current Guidelines US Preventive Task Force Test Bone Mineral Density in all women over age 65, younger postmenopausal women with at least one risk factor, and postmenopausal women with a history of fracture Treat patients with T score <-2 and no risk factors, T score <1.5 if any risk factors, and anyone with prior vertebral/hip fracture
Slide 26 - Who is left out? Older men Not included in recommendations Screening not recommended or paid for Significant problem, risk of osteoporosis, risk of fracture, especially after age 70, even more so after age 80 Significant evidence that men with osteoporosis benefit from treatment
 

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