On Wednesday, November 14, 2018 at 8:00 PM EST, the American Orthopaedic Association (AOA) and The Journal of Bone & Joint Surgery (JBJS) will co-host a one-hour complimentary webinar that offers practical advice on how to achieve greater diversity in your orthopaedic workforce. The guidance comes from five orthopaedists with an impressive track record of success in meeting this challenge head-on:
- Regis O’Keefe, MD, PhD, FAOA
- Mary O’Connor, MD, FAOA
- Julie Samora, MD, PhD, MPH
- Kristy Weber, MD, FAOA
- Lisa Lattanza, MD, FAOA
Recognizing the lack of diversity in the profession of orthopaedics as a critical issue, this webinar is one of many AOA initiatives supporting increased diversity within the profession.
Seats are limited, so REGISTER NOW.
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.
A bioﬁlm is a complex combination of extracellular carbohydrates, proteins, lipids, and one or more species of bacteria that may adhere to an orthopaedic implant and surrounding tissue (see related OrthoBuzz post). Staphylococci bacteria are believed to account for more than 50% of all bioﬁlm infections of medical devices.
Researchers recently summarized what we know about the biofilm formation process.1 In the attachment phase, free-floating bacteria attach to a prosthetic surface via proteins. Extracellular DNA from autolysis add to the mix. Then begins the irreversible attachment phase, during which the initial bacteria are incarcerated while more free-floating bacteria are added. During this phase, autoinducers are expressed, which serve as inter- and intrabacterial signals.
In the presence of an adequate quorum of bacteria, the maturation phase begins, during which the bacterial population cohesively shifts from replication to expression of virulence factors such as secretion systems, toxins, or bioﬁlm formation. A mature biofilm is immune-resistant, although bacterial replication decreases. In the dispersal phase bacteria become planktonic again, potentially available to repeat the process.
Once a biofilm has formed, antibiotic administration becomes problematic because of the toxicity of the high doses needed to treat biofilm colonies. An underlying challenge with pharmacologic intervention is the variety of quorum-sensing communication pathways between bacterial species. The authors suggest that a future biofilm-fighting strategy may be to force bacteria into bioﬁlm-forming behavior before they reach the necessary critical density to become virulent, although this notion remains unexplored. Researchers are investigating other possible strategies to disrupt the quorum-sensing communication among bacteria that enable them to behave as a “social” group.
- Mooney JA, Pridgen EM, Manasherob R, Suh G, Blackwell HE, Barron AE, Bollyky PL, Goodman SB, Amanatullah DF. Periprosthetic bacterial biofilm and quorum sensing. J Orthop Res. 2018 Sep;36(9):2331-2339. doi: 10.1002/jor.24019. Epub 2018 May 24.
Until I completed my pediatric orthopaedics rotation as a resident, I never thought much about pediatric lawn-mower injuries. I don’t recall how many such accidents we cared for during that time period, but I clearly remember one. It was grotesque and life-changing for the child–and definitely avoidable. That recollection was reinforced while I read the epidemiological study by Fletcher et al. in the October 17, 2018 edition of The Journal.
The authors analyzed 20 years of data from their institution in an effort to better understand these horrific injuries. They found two main demographic populations among the 157 patients who sustained mower-related injuries, which were lower-extremity injuries in 84% of all the patients. Those in the younger at-risk population (mean age of 4 years) were frequently injured by (or were passengers on) a riding lawn mower, usually operated by an older family member. This younger cohort had higher injury severity scores and higher amputation rates than the older pediatric population of mower-injured patients (mean age of 15 years). Most of those older patients were hurt while operating the lawn mower themselves. Not surprisingly, the authors found that these patients, whatever their age, underwent an average of almost three operations and spent close to a week in the hospital.
While there are a lot of important epidemiological data points in this article, the most important take-home message is the role that education must play in the prevention of these injuries. As the author state:
Education for the younger population should target the operators (parents, grandparents, older siblings) and emphasize the importance of keeping children out of the yard while lawn mowers are in use. Under no circumstance should a child of any age be the passenger on a lawn mower.
Despite ample literature on lawn-mower injuries, their incidence among pediatric patients has remained largely unchanged. I’m hopeful that this study will prompt more widespread implementation of patient education in this area. The American Academy of Orthopaedic Surgeons has information regarding lawn mower safety, and the Pediatric Orthopaedic Society of North America and the American Academy of Pediatrics are partnering on lawn-mower injury prevention. Accidents cannot be eradicated completely, but the more we avail ourselves of resources such as these—and share them with patients of all ages—the greater the likelihood of preventing these potentially devastating injuries.
Chad A. Krueger, MD
JBJS Deputy Editor for Social Media
Every 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, Robert Tashjian, MD, co-author of the October 17, 2018 Specialty Update on shoulder and elbow surgery, selected the most clinically compelling findings from among the 36 studies summarized in the Specialty Update.
Progression of Primary Osteoarthritis
–A study evaluating the relationship between glenoid erosion patterns and rotator cuff muscle fatty infiltration found that fatty infiltration was associated with B3 glenoids, increased pathologic glenoid retroversion, and increased joint-line medialization. The authors recommend close observation of patients with B-type glenoids, as the progression of glenoid erosion is more likely in B-type than A-type glenoids.
Perioperative Pain Management
–In a randomized controlled trial of perioperative pain management in patients undergoing primary shoulder arthroplasty, narcotic consumption during the first 24 postoperative hours was similar between a group that received interscalene brachial plexus blockade and a group that received intraoperative soft-tissue infiltration of liposomal bupivacaine. The interscalene group had lower VAS pain scores at 0 and 8 hours postoperatively; both groups had similar VAS pain scores at 16 hours; and the soft-tissue infiltration group had lower pain scores at 24 hours postoperatively.
–In a reevaluation of patients with nonoperatively treated chronic, symptomatic full-thickness rotator cuff tears that had become asymptomatic at 3 months, researchers found that at a minimum of 5 years, 75% of the patients remained asymptomatic.1 The Constant scores in the group that remained asymptomatic were equivalent at 5 years to those who initially underwent surgical repair. While these findings suggest that nonoperative treatment can yield clinical success at 5 years, the authors caution that “individuals with substantial tear progression or the development of atrophy will likely have a worse clinical result.”
–A recent study of the progression of fatty muscle degeneration in asymptomatic shoulders with degenerative full-thickness rotator cuff tears found that larger tears at baseline had greater fatty degeneration, and that tears with fatty degeneration were more likely to enlarge over time. Median time from tear enlargement to fatty degeneration was 1 year. Because the rapid progression of muscle degeneration seems to occur with increasing tear size, such patients should be closely monitored if treated nonoperatively.
Shoulder Instability in Athletes
–An evaluation of outcomes among 73 athletes who had undergone Latarjet procedures found that, after a mean follow-up of 52 months, ASES scores averaged 93. However, only 49% of the athletes returned to their preoperative sport level; 14% decreased their activity level in the same sport; and 12% changed sports altogether. While the Latarjet can help stabilize shoulders in athletes, the likelihood is high that the athlete won’t return to the same level in the same sport after the procedure.
- Boorman RS, More KD, Hollinshead RM, Wiley JP, Mohtadi NG, Lo IKY, Brett KR. What happens to patients when we do not repair their cuff tears? Five-year rotator cuff quality-of-life index outcomes following nonoperative treatment of patients with full-thickness rotator cuff tears. J Shoulder Elbow Surg. 2018 Mar;27(3):444-8.
Over the last 2 decades, research into how various “preexisting conditions” affect the outcomes of orthopaedic interventions has increasingly focused on the impact of mental health (a patient’s “state of mind” and coping abilities) and psychological diagnoses such as depression. The impact of mental health, depression, and personality characteristics on patient-reported outcomes following significant skeletal trauma has been well documented in the trauma literature. In addition, previous studies in knee arthroplasty have identified depression as a major factor in suboptimal patient outcomes.
In the October 17, 2018 issue of The Journal, Halawi et al. teased out the impact of depression and mental health—independently and in combination—on patient-reported outcomes following primary total joint arthroplasty (TJA) in 469 patients at a minimum follow-up of one year.
The authors used the validated SF-12 MCS instrument to assess patient baseline mental health at the time of surgery. They also used the widely accepted WOMAC score to assess joint-specific pain, stiffness, and physical function before and after surgery. Using these tools, the authors showed that, while depression alone may diminish some patient-reported gains obtained from arthroplasty, it does not seem to affect a patient’s overall outcome as much as poor mental health prior to surgery. In this study, patients with depression but good mental health achieved patient-reported outcomes comparable to those among normal controls. Still, patients without depression and in good mental health were found to have the most robust improvements after undergoing TJA.
Orthopaedic surgeons need to better understand the interplay between these complex psychological states and patient outcomes. These authors conclude that the effect of depression on patient-reported outcomes is “less pessimistic than previously thought,” but we welcome further studies examining the link between “the mind” and orthopaedic outcomes. Finally, we should be ready to refer patients to our mental health colleagues when we detect a potential underlying nonphysical condition that might adversely affect the magnitude of benefit from the treatments we offer.
Marc Swiontkowski, MD
OrthoBuzz occasionally receives posts from guest bloggers. This guest post comes from Matthew Herring, MD in response to a recent study in the Journal of Orthopaedic Trauma.
Low-energy sacral fractures in the geriatric population typically heal over time without operative intervention. Nonoperative treatment usually involves analgesics and progressive rehabilitation. Unfortunately, given the frailty and low physiologic reserves of many in this patient population, these fractures can still take a significant toll. Fracture pain may last for weeks to months; deconditioning occurs secondary to poor mobilization; and many patients are discharged to skilled nursing facilities rather than returning directly home.
Given this associated morbidity, Walker et al.1 asked whether percutaneous transiliac-transsacral screw fixation could offer some benefit in the treatment of sacral fragility fractures. The authors present a retrospective review of 41 elderly patients who were admitted with sacral fragility fractures. All patients first received a trial of nonoperative management, which included analgesia and physical therapy-guided mobilization. If patients were unable to appropriately ambulate secondary to pain, they were offered surgery. Sixteen patients elected surgery, which consisted of transiliac-transsacral screw fixation of the posterior pelvic ring.
After surgery, the operative group reported greater reductions in pain than the nonoperative cohort, and they were more likely to be discharged directly home from the hospital (75% versus 20%). Furthermore, at the time of discharge, 100% of the surgical patients were able to ambulate with physical therapy, compared to only 72% of the nonoperative group. No surgical complications occurred, and the average total surgical time was only 34 minutes.
Sacral fragility fractures can result in significant pain and disability in an already frail population. While these fractures are typically managed conservatively, this study suggests that some patients may benefit from surgical intervention. Percutaneous transiliac-transsacral screw fixation is a relatively low-risk procedure (at least in the normomorphic sacrum). And if a single screw can reduce pain, improve function, and more quickly return geriatric patients to their baseline level of independence, then the risk-benefit calculus would favor surgery, unless specific contraindications are present.
While this study is not powerful enough to rewrite treatment protocols, it does give credence to considering surgical fixation for sacral fragility fractures in those who still struggle after a trial of conservative management, and it makes a strong argument for further investigation.
Matthew Herring, MD is a fellow in orthopaedic trauma at the University of California, San Francisco and a member of the JBJS Social Media Advisory Board.
- Walker, J. Brock, et al. “Percutaneous Transiliac–Transsacral Screw Fixation of Sacral Fragility Fractures Improves Pain, Ambulation, and Rate of Disposition to Home.” Journal of orthopaedic trauma 32.9 (2018): 452-456.
Under one name or another, The Journal of Bone & Joint Surgery has published quality orthopaedic content spanning three centuries. In 1919, our publication was called the Journal of Orthopaedic Surgery, and the first volume of that journal was Volume 1 of what we know today as JBJS.
Thus, the 24 issues we turn out in 2018 will constitute our 100th volume. To help celebrate this milestone, throughout the year we will be spotlighting 100 of the most influential JBJS articles on OrthoBuzz, making the original full-text content openly accessible for a limited time.
Unlike the scientific rigor of Journal content, the selection of this list was not entirely scientific. About half we picked from “JBJS Classics,” which were chosen previously by current and past JBJS Editors-in-Chief and Deputy Editors. We also selected JBJS articles that have been cited more than 1,000 times in other publications, according to Google Scholar search results. Finally, we considered “activity” on the Web of Science and The Journal’s websites.
We hope you enjoy and benefit from reading these groundbreaking articles from JBJS, as we mark our 100th volume. Here are two more:
Injuries Involving the Epiphyseal Plate
RB Salter, WR Harris: JBJS, 1963 April; 45 (3): 587
In addition to presenting the fracture classification, the authors laid the groundwork with basic principles of mechanical failure and vascularity of the physis. The authors then explain how physeal damage may arise from misalignment, crushing, or vascular interruption. This enduring orthopaedic schema lives on because of its clarity of presentation and its implications for treatment.
Pyogenic Osteomyelitis of the Spine
J Kulowski: JBJS, 1936 April; 18 (2): 343
In this 22-page analysis and discussion of 102 cases, the author notes that pyogenic osteomyelitis of the spine can affect any part of the vertebral system. In 1936—8 years after the discovery of penicillin—Kulowski said, “It may be axiomatically stated that operative intervention is imperative, as soon as the diagnosis is made with a reasonable degree of accuracy, when suppuration is present…,” adding that “the primary spinal focus requires the first attention of the surgeon.”
In 2015, JBJS launched an “article exchange” collaboration with the Journal of Orthopaedic & Sports Physical Therapy (JOSPT) to support multidisciplinary integration, continuity of care, and excellent patient outcomes in orthopaedics and sports medicine.
During the month of October 2018, JBJS and OrthoBuzz readers will have open access to the JOSPT article titled “Validity of Clinical Small-Fiber Sensory Testing to Detect Small–Nerve Fiber Degeneration.”
This prospective, cross-sectional, diagnostic-accuracy study found that pinprick testing, followed by warm and cold tests if pinprick is normal, is a valid and cost-effective method to detect small-fiber degeneration in a carpal tunnel syndrome model of neuropathy.