Tag Archive | Osteoporosis

Keeping Your Bones Pumped Up

This post comes from Fred Nelson, MD, an orthopaedic surgeon in the Department of Orthopedics at Henry Ford Hospital and a clinical associate professor at Wayne State Medical School. Some of Dr. Nelson’s tips go out weekly to more than 3,000 members of the Orthopaedic Research Society (ORS), and all are distributed to more than 30 orthopaedic residency programs. Those not sent to the ORS are periodically reposted in OrthoBuzz with the permission of Dr. Nelson. 

While a reasonable amount of “pumping iron” exercise has proven beneficial for musculoskeletal health, long-term use of acid-suppressing proton pump inhibitors (PPIs) may have the opposite effect on bone. Many people are currently taking PPIs, most commonly for gastrointestinal disorders such as heartburn and gastroesophageal reflux. Fortunately, many are occasional PPI users, taking the drugs only when symptoms arise. However, PPIs are often prescribed long term for preventive reasons.1

The same proton-pump mechanism present in the GI tract is seen in the vacuolar H+-ATPases that are present in high concentrations on the ruffled border of osteoclasts.2 Years of PPI use may therefore interfere with normal and essential bone remodeling. PPIs are also prescribed in the pediatric population for reflux symptoms. The effect of PPIs on future fracture or long-term osteoporosis in these very young patients is not clear.

The consequences for adult and elderly patients are clearer. Femoral bone mineral density is significantly decreased in PPI users. Also, patients with peptic ulcer disease using PPIs have a higher risk for osteoporosis than peptic ulcer patients not using PPIs. Among younger adults, the risk of fracture was significantly higher in those using PPIs than in those not using PPIs.

In 2010, the FDA issued a communication alerting healthcare professionals that users of PPIs have a possible increased risk of fractures of the hip, wrist, and spine, and that they should weigh the known benefits against the potential risks when recommending use of these medications. In 2011, the FDA refined its language somewhat: “Following a thorough review of available safety data, FDA has concluded that fracture risk with short-term, low dose PPI use is unlikely.” Still, when fractures are the outcome of interest, the data implicates long-term use of PPIs in having deleterious effects on bone.

Although data on human fracture healing in association with PPI use are sparse, animal studies do show that PPIs have a negative impact on normal fracture healing, with a decrease in the expression of important markers of bone formation, including bone morphogenetic protein (BMP)-2, BMP-4, and cysteine-rich angiogenic inducer (CYR)61.

It is time to question the need for chronic use of PPIs by our patients. Orthopaedists should encourage their patients who take PPIs to discuss this matter with their primary care physician.

References

  1. Eom CS, Park SM, Myung SK, Yun JM, Ahn JS. Use of acid-suppressive drugs and risk of fracture: a meta-analysis of observational studies. Ann Fam Med. 2011 May-Jun;9(3):257-67. doi: 10.1370/afm.1243. PMID: 21555754
  1. Wagner SC. Proton Pump Inhibitors and Bone Health: What the Orthopaedic Surgeon Needs to Know. JBJS Rev. 2018 Dec 18. doi: 10.2106/JBJS.RVW.18.00029. [Epub ahead of print] No abstract available. PMID: 30562209

Using CT Data to Diagnose Osteoporosis

Osteoporosis is a “silent” disease, often becoming apparent only after a patient older than 50 sustains a low-energy fracture of the wrist, proximal humerus, or hip. Monitoring serum vitamin D levels and DEXA testing represent ideal screening methods to prevent these sentinel fragility fractures. In addition, through programs such as the AOA’s “Own the Bone” initiative, the orthopaedic community has taken a leadership role in diagnosing and treating osteoporosis after the disease presents as a fragility fracture. Own the Bone is active in all 50 states and, through local physician leadership, is identifying individuals who present with a fragility fracture so they can receive follow-up care that helps mitigate bone loss and prevent secondary fractures.

We still have a long way to go, however. Recent analyses show that only 30% of candidate patients (albeit up from 20%) are receiving this type of evidence-based care. The best-case scenario would be to identify at-risk men and women (osteoporosis does not affect women exclusively) before a potentially serious injury.

In the December 5, 2018 issue of The Journal, Anderson et al. present strong evidence that computed tomography (CT) can provide accurate data for diagnosing osteoporosis. CT is increasingly used (perhaps overused in some settings) across a spectrum of diagnostic investigations. The osseous-related data from these scans can be used to glean accurate information regarding a patient’s bone quality by analyzing the Hounsfield unit (HU) values of bone captured opportunistically by CT.  HU data are routinely ignored, but the values correlate strongly with bone mineral density, and they could help us recommend preventive care to our patients before a fragility fracture occurs. (For example, a threshold of <135 HU for the L1 vertebral body indicates a risk for osteoporosis.)

Orthopaedists should discuss the possibility of asking their radiologist colleagues who read CT scans of older patients to routinely share that data. When indicated, we could promptly refer patients back to their primary care provider for discussion of pharmacological treatment and lifestyle changes proven to help prevent primary fragility fractures. There is little doubt that our patients are getting older. Reviewing CT data  could help us dramatically improve preventive care and decrease the risk of first-time fragility fractures.

Click here for additional OrthoBuzz posts about fragility fractures.

Marc Swiontkowski, MD
JBJS Editor-in-Chief

More Evidence: Coordinated Care Reduces Risk of Second Fragility Fracture

Fracture liaison services and similar coordinated, multidisciplinary fragility-fracture reduction programs for patients with osteoporosis work (see related OrthoBuzz posts), but until now, the data corroborating that have come from either academic medical centers or large integrated health care systems. The November 7, 2018 issue of The Journal of Bone and Joint Surgery presents solid evidence from a retrospective cohort study that a private orthopaedic practice-based osteoporosis management service (OP MS) also successfully reduces the risk of subsequent fragility fractures in older patients who have already sustained one.

Sietsema et al. collected fee-for-service Medicare data for Michigan residents who had any fracture from April 1, 2010 to September 30, 2014 (mean age of 75 years). From that data, they compared outcomes for patients who received nurse-practitioner-led OP MS care from a single-specialty private orthopaedic practice within 90 days of the first fracture to outcomes among a propensity-score-matched cohort of similar patients who did not receive OP MS care. There were >1,300 patients in each cohort, and both groups were followed for an average of 2 years. The private practice’s OP MS services incorporated the multidisciplinary protocols promulgated by the American Orthopaedic Association’s “Own the Bone” program.

The cohort exposed to OP MS had a longer median time to subsequent fracture (998 versus 743 days), a lower incidence rate of any subsequent fracture (300 versus 381 fractures per 1,000 person-years), and higher incidence rates of osteoporosis medication prescriptions filled (159 versus 90 per 1,000 person-years). Over the first 12 months of the follow-up period, total medical costs did not differ significantly between the 2 cohorts.

These findings are consistent with those reported from academic or integrated health-system settings. According to the authors, this preponderance of evidence “emphasize[s] the importance of coordinated care in reducing subsequent fractures, lengthening the time to their occurrence, and improving patient outcomes.” Sietsema et al. conclude further that “the U.S. Medicare population would benefit from widespread implementation of such models in collaboration with orthopaedic providers and payers.”

Sept. 11 Webinar – Assessment of Bone Health for the Orthopaedic Surgeon

Sept Webinar Speakers

Orthopaedic care teams can play an active role in evaluating and optimizing their patients’ bone health to help prevent primary and secondary fragility fractures and to improve postsurgical outcomes. In just about any orthopaedic scenario, helping patients optimize their bone health is an imperative for the delivery of quality care.

On Tuesday, September 11, 2018 at 8 pm EDTthe American Orthopaedic Association (AOA) and The Journal of Bone & Joint Surgery (JBJS) will host a complimentary one-hour webinar that will cover the basics of a bone-health assessment by orthopaedists.

  • Christopher Shuhart, MD will discuss the fundamentals of bone-related laboratory workups and bone densitometry studies.
  • Joe Lane, MD, FAOA will identify bone-health “red flags” in orthopaedic patients, including common nutritional deficiencies.
  • Paul Anderson, MD, FAOA will cover recent advances in bone-density measurements.

Moderated by Douglas Lundy, MD, MBA, FAOA, orthopaedic trauma surgeon at Resurgens Orthopaedics, this webinar will include a 15-minute live Q&A session during which attendees can ask questions of the panelists.

Seats are limited so REGISTER NOW.

What’s New in Spine Surgery 2018, Part II

Spine_Graphic for OBuzz

Previously, Chad A. Krueger, MD, JBJS Deputy Editor for Social Media, selected what he deemed to be the most clinically compelling findings from among the more than 25 studies cited in the June 20, 2018 Specialty Update on Spine Surgery.  In this OrthoBuzz post, Theodore J. Choma, MD, author of the Specialty Update on Spine Surgery, selected his “top five.”

Spondylolisthesis
–A registry study of 765 patients with adult isthmic spondylolisthesis and at least 2 years of post-treatment outcome data found that at 1 year, global-assessment improvements were reported in 54% of patients who underwent uninstrumented posterolateral fusion, 68% of patients who underwent instrumented posterolateral fusion, and 70% of patients who underwent interbody fusion. Although similar patterns were seen in VAS back pain scores and in 2-year data, fusion with instrumentation was associated with a higher risk of reoperation.

Acute Low Back Pain
–In a cost analysis using data from a previously published Level-II study that randomized 220 patients with acute low back pain to early physical therapy or usual (delayed-referral) care, authors concluded that the incremental cost of early PT was $32,058 per quality-adjusted life year and that early PT is therefore cost-effective.1

Metabolic Bone Disease
–A randomized trial of 66 women ≥50 years of age who had osteoporosis and had undergone lumbar interbody arthrodesis found that those who received once-weekly teriparatide for 6 months following surgery demonstrated higher fusion rates than those in the control cohort (69% versus 35%). Once weekly teriparatide may be worth considering to improve fusion rates in this challenging patient population.

Adult Deformity Correction
–To test the hypothesis that performing 3-column osteotomies more caudally in the lumbar spine might improve sagittal malalignment correction, authors analyzed 468 patients from a spine deformity database who underwent 3-column osteotomies.2 The mean resection angle was 25.1° and did not vary by osteotomy level. No variations were found in the amount of sagittal vertical axis or pelvic tilt correction, but lower-level osteotomies were associated with more frequent pseudarthroses and postoperative motor deficits.

Spinal Cord Injury
–Authors directly measured the mean arterial pressure and cerebrospinal fluid pressure in 92 consecutive patients with traumatic spinal cord injury. Using that data to indirectly monitor the patients’ spinal cord perfusion pressure,3 the authors found that patients who experienced more episodes of spinal cord perfusion pressures <50 mm Hg were less likely to manifest objective improvements in spinal cord function.

References

  1. Fritz JM, Kim M, Magel JS, Asche CV. Cost-effectiveness of primary care management with or without early physical therapy for acute low back pain: economic evaluation of a randomized clinical trial. Spine (Phila Pa 1976).2017 Mar;42(5):285-90.
  2. Ferrero E, Liabaud B, Henry JK, Ames CP, Kebaish K, Mundis GM, Hostin R, Gupta MC, Boachie-Adjei O,Smith JS, Hart RA, Obeid I, Diebo BG, Schwab FJ, Lafage V. Sagittal alignment and complications following lumbar 3-column osteotomy: does the level of resection matter?J Neurosurg Spine. 2017 Nov;27(5):560-9. Epub 2017 Sep 8.
  3. Squair JW, Bélanger LM, Tsang A, Ritchie L, Mac-Thiong JM, Parent S, Christie S, Bailey C, Dhall S, Street J,Ailon T, Paquette S, Dea N, Fisher CG, Dvorak MF, West CR, Kwon BK. Spinal cord perfusion pressure predicts neurologic recovery in acute spinal cord injury. 2017 Oct 17;89(16):1660-7. Epub 2017 Sep 15.

Fragility Fracture Workshop & Symposium—June 28 & 29, 2018

ownbone_logo-rOn Thursday evening, June 28 and all day Friday, June 29 in Boston, The American Orthopaedic Association (AOA) and the National Association of Orthopaedic Nurses (NAON) will present two educational/networking events concentrating on secondary fragility fracture prevention.

The Thursday evening Workshop, available only to those attending the Friday Symposium, will convene clinicians with expertise in counseling and treating fragility fracture patients. “This new two-hour workshop provides an additional opportunity to learn more about identifying, assessing, counseling, and treating fragility fracture patients,” said program co-chair Debra Sietsema, PhD, RN. “The Workshop also includes special breakout stations on calcium, FRAX, and the AOA’s ‘Own the Bone’ initiative.”

The all-day Symposium on Friday focuses on how to establish a multidisciplinary secondary fragility fracture program. In addition, the Symposium will include relevant case studies demonstrating how to translate the principles into hospital, private-practice, or clinic settings. “This Symposium is a great opportunity for orthopaedic surgeons and allied health professionals to get the full picture in one day,” said Dr. Sietsema. “Attendees will gain both basic and expanded knowledge to put their programs in place.”

Register by May 15 to receive early-bird pricing for these important events. NAON members and clinicians from enrolled Own the Bone institutions save an additional $50.

More Progress in Preventing Secondary Fragility Fractures

ownbone_logo-rHow well do fracture liaison services (FLSs) work in terms of patients who’ve had a fragility fracture receiving a recommendation for anti-osteoporosis treatment? Very well, according to findings from an analysis of more than 32,000 patients by Dirschl and Rustom in the April 18, 2018 edition of The Journal of Bone & Joint Surgery.

A fracture liaison service is a coordinated, multidisciplinary model of care designed to reduce the risk of future fractures among patients who’ve sustained a primary fragility fracture. (Click here for another recent JBJS article about the FLS model.) The American Orthopaedic Association (AOA) has been a major proponent of the FLS model, and it is a cornerstone of the AOA’s “Own the Bone” national quality-improvement program.

Dirschl and Rustom found that between 2009 and 2016, at 147 sites participating in an FLS through Own the Bone, 72.8% of 32,671 patients initially evaluated for a fragility fracture received a recommendation for anti-osteoporosis treatment. That’s a vast improvement compared with previous reports that indicate only 20% of patients with a fragility fracture received either an osteoporosis evaluation or treatment. In this current study, a sedentary lifestyle and having a parent who had sustained a hip fracture were the patient factors associated with those most likely to receive a recommendation for treatment.

OrthoBuzz editors were surprised to read that anti-osteoporosis treatment was initiated in only 12.1% of the patients in this study. When we asked JBJS Editor-in-Chief Marc Swiontkowski, MD for a further explanation, he noted that the study captured data only from the initial post-fracture encounter between patients and FLS clinicians. The percentage of patients initiating treatment would have been much higher, he said, if the data had included those who followed up their initial FLS evaluation with a primary care physician. He also remarked that some people are dissuaded from taking an FDA-approved prescription anti-osteoporosis medication by the disproportionate focus on side effects that patients read in social media and the lay press. And there are some patients for whom prescription anti-osteoporosis drugs are truly contraindicated.

But with an estimated 2 million people in the US sustaining a fragility fracture each year, these results indicate substantial progress in practices that will prevent secondary fractures.

Click here for a listing of upcoming Own the Bone events.

Fragility Fracture Risk Prediction: Beyond BMD

BMD for OBuzzThis basic science tip comes from Fred Nelson, MD, an orthopaedic surgeon in the Department of Orthopedics at Henry Ford Hospital and a clinical associate professor at Wayne State Medical School. Some of Dr. Nelson’s tips go out weekly to more than 3,000 members of the Orthopaedic Research Society (ORS), and all are distributed to more than 30 orthopaedic residency programs. Those not sent to the ORS are periodically reposted in OrthoBuzz with the permission of Dr. Nelson.

Bone mineral density (BMD)—a measure of both cortical and trabecular bone—has been widely used as an index of bone fragility. The femoral neck and lumbar vertebrae are the areas most commonly measured with BMD, but hip osteoarthritis and lumbar spondylosis can mask systemic osteoporosis. In addition, the most common fragility fractures occur at the distal radius.

Investigators conducted a prospective study using high-resolution peripheral quantitative computed tomography (HR-pQCT) of the distal radius and tibia to determine whether baseline skeletal parameters could predict fragility fractures in women. A second goal was to establish whether women who have fragility fractures experience bone loss at a faster rate than those who do not have fractures.

Among 149 women older than 60 years who had baseline and 5-year follow-up HR-pQCT, 22 had a fragility fracture during the study period and 127 did not. HR-pQCT is able to record total bone mineral density (Tt.BMD), trabecular bone mineral density (Tb.BMD), trabecular number (Tb.N), and trabecular separation (Tb.Sp).

The analysis showed that women with fragility fractures had lower baseline Tt.BMD (19%), Tb.BMD (25%), and Tb.N (14%), along with higher Tb.Sp (19%) than women who did not experience a fracture. Analysis of the tibia measures yielded similar results, showing that women with incident fracture had lower Tt.BMD (15%), Tb.BMD (12%), cortical thickness (14%), and cortical area (12%). Also, women with fractures had lower failure load (10%) with higher total area and trabecular area than women without fractures.

For each standard deviation decrease of a measure at the distal radius, the odds ratio for fragility fracture was 2.1 for Tt.BMD. 2.0 for Tb.BMD, and 1.7 for Tb.N. ORs for those measures at the tibia were similar.

In contrast to these findings, the annualized percent rate of bone loss was not different between groups with and without fractures. These results suggest that future fragility-fracture risk prediction should rely at least as much on bone architecture and strength as on simple BMD measurements.

Reference
Burt LA, Manske SL, Hanley DA, Boyd SK. Lower Bone Density, Impaired Microarchitecture, and Strength Predict Future Fragility Fracture in Postmenopausal Women: 5-Year Follow-up of the Calgary CaMos Cohort. J Bone Miner Res. 2018 Jan 24. doi: 10.1002/jbmr.3347 PMID: 29363165

What’s New in Spine Surgery

Spine for O'Buzz.jpegEvery month, JBJS publishes a Specialty Update—a review of the most pertinent and impactful studies published in the orthopaedic literature during the previous year in 13 subspecialties. Click here for a collection of all OrthoBuzz Specialty Update summaries.

This month, OrthoBuzz asked Theodore Choma, MD, co-author of the June 21, 2017 Specialty Update on spine surgery, to select the five most clinically compelling findings from among the more than 40 studies cited in the article.

Biomaterials and Biologics

A multicenter randomized prospective trial compared osteogenic protein-1 (OP-1, also known as bone morphogenetic protein [BMP]-7) combined with local autograft to iliac crest autograft combined with local autograft in posterolateral lumbar fusion. Based on computed tomography (CT) scan assessments, the authors found a 54% fusion rate in the OP-1 group and a 74% fusion rate in the iliac crest group. OP-1 appears to be a poor substitute for iliac crest autograft for achieving posterolateral lumbar fusion.

Adult Spinal Deformity (ASD)

We continue to elucidate the risks and morbidity of adult degenerative spinal deformity surgery. The Scoli-Risk-1 study,1 a Level-III multicenter, prospective observational study, reported on 272 patients with ASD treated surgically. Twenty-two percent of the patients were discharged from the hospital with a decline in the lower-extremity motor score, while only 13% demonstrated improvement. However, by 6 months postoperatively, 21% demonstrated improvement, 69% demonstrated maintenance, and 11% continued to demonstrate lower-extremity motor decline.

Spinal Cord Injury

A Level-I, randomized, crossover trial2 examined whether the character of neuropathic pain following spinal cord injury determined the response to 300 mg/day of either pregabalin or oxcarbazepine. Both anticonvulsant medications significantly improved neuropathic pain in these patients. A subgroup analysis demonstrated that oxcarbazepine was more effective in patients without evoked pain and pregabalin was more effective in patients with evoked pain.

Lumbar Degenerative Spondylolisthesis

To address the consequences of fusion along with decompression in degenerative lumbar spondylolisthesis, a Level-I, randomized controlled trial3 specifically compared laminectomy only with laminectomy plus fusion among 66 patients with stable degenerative spondylolisthesis and symptomatic lumbar stenosis. Patients in the fusion group had significantly higher SF-36 scores at 2, 3, and 4 years, but the groups did not differ with respect to ODI scores at 2 years. The authors reported a significantly higher reoperation rate (34% compared with 14%) in the decompression-only group over the 4-year follow-up, but patients who underwent decompression with fusion began to have an increase in the probability of reoperation 36 months after surgery.

Osteoporotic Injuries

We have more evidence of the effectiveness of vertebral cement augmentation for osteoporotic thoracolumbar compression fractures. The authors of a level-I systematic review and meta-analysis examined randomized controlled trials comparing vertebroplasty with conservative treatment or placebo/sham and identified 11 relevant studies involving 1,048 subjects. The meta-analysis found that patients receiving percutaneous vertebroplasty (n = 531) had lower pain ratings at 1 to 2 weeks, 2 to 3 months, and 1 year. The effect size of vertebroplasty was significant and close to the minimal clinically important difference (MCID).

References

  1. Lenke LG, Fehlings MG, Shaffrey CI, Cheung KM, Carreon L, Dekutoski MB, Schwab FJ, Boachie-Adjei O, Kebaish KM, Ames CP, Qiu Y, Matsuyama Y, Dahl BT, Mehdian H, Pellis´e-Urquiza F, Lewis SJ, Berven SH. Neurologic outcomes of complex adult spinal deformity surgery: results of the prospective, multicenter Scoli-RISK- 1 study. Spine (Phila Pa 1976). 2016 Feb;41(3):204-12.
  2. Min K, Oh Y, Lee SH, Ryu JS. Symptom-based treatment of neuropathic pain in spinal cord-injured patients: a randomized crossover clinical trial. Am J Phys Med Rehabil. 2016 ;95(5):330–8
  3. Ghogawala Z, Dziura J, Butler WE, Dai F, Terrin N, Magge SN, Coumans JV, Harrington JF, Amin-Hanjani S, Schwartz JS, Sonntag VK, Barker FG 2nd, Benzel EC. Laminectomy plus fusion versus laminectomy alone for lumbar spondylolisthesis. N Engl J Med. 2016 Apr 14;374(15):1424-34.

Fracture Liaison Service Boosts Patient Engagement with Secondary Prevention

fragility fractures for O'Buzz.pngOrthoBuzz has published several posts about osteoporosis, fragility fractures, and secondary fracture prevention. In the May 17, 2017 edition of JBJS, Bogoch et al. add to evidence suggesting that a coordinator-based fracture liaison service (FLS) improves engagement with secondary-prevention practices among inpatients and outpatients with a fragility fracture.

The Division of Orthopaedic Surgery at the University of Toronto initiated a coordinator-based FLS in 2002 to educate patients with a fragility fracture and refer them for BMD testing and management, including pharmacotherapy if appropriate. Bogoch et al. analyzed key clinical outcomes from 2002 to 2013 among a cohort of 2,191 patients who were not undergoing pharmacotherapy when they initially presented with a fragility fracture.

  • Eighty-four percent of inpatients and 85% of outpatients completed BMD tests as recommended.
  • Eighty-five percent of inpatients and 79% of outpatients who were referred to follow-up bone health management were assessed by a specialist or primary care physician.
  • Among those who attended the referral appointment, 73% of inpatients and 52% of outpatients received a prescription for anti-osteoporosis medication.

The authors conclude that “a coordinator-based fracture liaison service, with an engaged group of orthopaedic surgeons and consultants…achieved a relatively high rate of patient investigation and pharmacotherapy for patients with a fragility fracture.”