MedicalResearch.com Interview with:
Scott E. Hensley, Ph.D.
Assistant Professor
Wistar Institute
Philadelphia, PA 1910Medical Research: What is the background for this study? What are the main findings?Response: Previous studies documented that the the 2014-2015 H3N2 flu vaccine strain was antigenically distinct compared to most recent H3N2 flu strains. Recent H3N2 strains possess several mutation and it was previously unknown which of these mutations contributed to the 2014-2015 vaccine mismatch. We used a reverse-genetic engineering approach to identify specific viral mutations that contributed to the 2014-2015 vaccine mismatch.
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MedicalResearch.com Interview with:Jeffrey P. Henderson, M.D., Ph.D.
Assistant Professor of Medicine and Molecular Microbiology
Center for Women's Infectious Diseases Research
Division of Infectious Diseases
and Robin Shields-Cutler, Ph.D
Ph.D. Student, Molecular Microbiology and Microbial Pathogenesis
Washington University School of Medicine
St. Louis, Missouri
Medical Research: What is the background for this study?
Response: Increasing antibiotic resistance, together with an appreciation that many patients are particularly susceptible to recurrent Urinary Tract Infections UTIs following antibiotic therapy, motivated interest in the events that occur during early stages of UTI pathogenesis.
Abundant evidence suggests that uropathogenic E.coli must obtain iron from human hosts in order to cause a clinical infection. Early in infection, human cells secrete a protein called siderocalin that is known to limit bacterial growth by sequestering iron. This protein is detectable in the urine of Urinary Tract Infections patients.
Medical Research: What are the main findings?Response: We obtained urine from a diverse panel of healthy volunteers, inoculated them individually with a uropathogenic E.coli strain, and monitored growth in the presence and absence of a fixed amount of siderocalin. Siderocalin exhibited a remarkably wide range of activity between individuals.
We traced this variation back to differences in urinary pH and to phenolic urinary metabolites. We could significantly facilitate siderocalin’s antibacterial activity in urine by alkalinizing it above 6.5 and adding phenolic metabolites. The metabolites that potentiate siderocalin’s antibacterial effect have been linked to dietary sources such as coffee, tea, and berries. Some of these compounds may further derive from the actions of gut microbes on dietary phenols. The functional basis for these compounds’ properties seems to arise from siderocalin’s ability to use them as molecular grips that chelate iron ions in a form that is difficult for bacteria to access.
From the pathogen perspective, we found that enterobactin, a molecule secreted by E.coli, acts as a microbial countermeasure to urinary siderocalin. Adding a drug-like inhibitor to urine that blocks enterobactin biosynthesis greatly increased siderocalin’s antibacterial effect.
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MedicalResearch.com Interview with:
Ann Scheck McAlearney, Sc.D., M.S.Professor, Family Medicine
Vice Chair for Research, Department of Family Medicine
College of Medicine Ohio State University
Columbus, Ohio
MedicalResearch: What is the background for this study? What are the main findings?
Dr. McAlearney: In this study, we sought to explore the potential role high-performance work practices (HPWPs) may play in explaining differences in the success of central line-associated blood stream infection (CLABSI) reduction efforts involving otherwise similar organizations and approaches. We analyzed data from 194 key informant interviews across eight hospitals participating in the federally funded ‘‘On the CUSP: Stop BSI’’ initiative. We found evidence that at sites more successful at reducing central line-associated blood stream infection, HPWPs facilitated the adoption and consistent application of practices known to prevent CLABSIs; these HPWPs were virtually absent at lower performing sites.
In this paper we present examples of management practices and illustrative quotes categorized into four HPWP subsystems:
(a) staff engagement,
(b) staff acquisition/development,
c) frontline empowerment, and
(d) leadership alignment/development. (more…)
MedicalResearch.com Interview with:
Siv Klevar, DVM,PhD.
Norwegian Veterinary Institute
Department of Diagnostics
Section of Immunology
Oslo
Medical Research: What is the background for this study?
Dr. Klevar: Border control veterinary officers reported a surge in the number of imported dogs after the pet travel regulations were relaxed in 2012. At the same time rescue groups, through social media advertisement, encouraged and facilitated the adoption of dogs from shelters in Eastern Europe. The removal of the requirement regarding individual serological testing for antibodies to rabies before importing pets into UK, Ireland, Sweden, Malta and Norway, made it much easier to import pets into these countries. Previously import required several months of preparation and additional costs whereas under the new regulations it could be done after a single vaccination and a 3 week wait. The Norwegian Food Authority initiated a project to look at exotic pathogens in these re-homed dogs. This study reports the rabies antibody levels detected in some of the rehomed stray dogs entering Norway during 2012. The Norwegian Veterinary Institute and National Veterinary Institute in Sweden carried out the study.
Medical Research: What are the main findings?
Dr. Klevar: Our results showed that a high proportion of stray dogs, compared to a control group of pet dogs from Sweden, didn’t have sufficient protection against rabies virus after vaccination. Although we do not know exactly why this was the case, the exceedingly low levels of antibodies detected in some of the stray animals would suggest that they were not properly vaccinated, even though all the paperwork showed they were fully compliant with Pet Travel Regulations.
The main issue highlighted by this study is that the current regulations are not sufficient to prevent rabies introduction when importing rescue dogs from countries where the virus is present to countries free from the disease. The reason for this is that the current regulations do not require a check to see if the pet has been properly vaccinated (by testing the animal’s blood for antibodies). In addition to this, the 21 day waiting period after vaccination isn’t long enough for rabies to develop if the dog had been infected prior to vaccination.
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MedicalResearch.com Interview with:
Nishant Agrawal M.D.
Associate Professor of Otolaryngology
Johns Hopkins University School of Medicine
Medical Research: What is the background for this study? What are the main findings?
Dr. Agrawal: The idea of the study really arose from the specificity of genetic changes that characterize and are the hallmark of cancer cells. Only cancer cells contain these mutations so their detection in bodily fluids was a reasonable expectation. The current study builds on previous work from our group that tumor DNA can be detected in the bodily fluids of patients with many different types of solid malignancies. The main findings of the study are that tumor DNA in saliva and plasma provides a non-invasive biomarker for head and neck cancer. The take home message is that tumor DNA has potential to be used as a biomarker for screening, early detection, monitoring during treatment, and surveillance after cancer treatment is completed.
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MedicalResearch.com Interview with:
Jamie D. Feusner, M.D.
Associate Professor of Psychiatry and Biobehavioral Sciences
Director, Adult OCD Program
Director, Eating Disorder and Body Dysmorphic...
MedicalResearch.com Interview with:
Michael B. Burns, Ph.D.
HHMI Post-Doctoral Fellow
Dept. of Genetics, Cell Biology and Development
Dept. of Ecology, Evolution, and Behavior
Masonic Cancer Center
Dept. of Biology Teaching and Learning
University of Minnesota Twin Cities
St. Paul, MN 55108
Medical Research: What is the background for this study?
Dr. Burns: Recent technological advances have made it possible to survey all the of microbes that are in, on, and around us. One of the surprising things is the sheer quantity and diversity of the bacteria in our environments and our microbiomes. Many researchers have begun the systematic characterization of the microbes that are associated with specific disease states, including cancer. With regard to colorectal cancer, there have been numerous studies that have identified specific bacteria that are linked to the presence of the disease. There have been many reports that have identified particular potentially important microbes that may be causing the cancer, driving the cancer, or some combination of the two. Among these microbes, one of the best studied so far is a group of bacteria called Fusobacterium.
Medical Research: What are the main findings?
Dr. Burns: In our work, we set out to perform another characterization of the bacteria in the gut microbiome that are specifically associated with colorectal tumors. We used samples of normal colon tissue from the same individuals as controls, which allowed us to account for much of the variability in the different bacteria we found that might have been simply the result of, for instance, diet. In our analysis, we confirmed the previous results related to Fusobacterium, and additionally discovered a new potential culprit in colorectal cancer, a group of bacteria named Providencia.
The finding of another new set of microbes that might be causing or driving cancer is not surprising. As indicated above, there are many groups who have found other potential candidate microbes that could be implicated in the disease. Our next question was to determine if there was some reason why there might be so many different bacteria that are linked with the disease and what it might be able to tell us about what these bacteria are doing. To that end, we used computational approaches to assess what these two groups of bacteria might be doing at a functional level and if there were any similarities. We found that there was a great deal in common between Fusobacterium and Providencia, including a finding that one of the common functions was related to a large group of virulence genes.
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MedicalResearch.com Interview with:
Jose A. Garcia Salcedo, PhD.
Unidad de Enfermedades Infecciosas
Hospital Universitario San Cecilio
Instituto de Investigación Biosanitaria de Granada
Granada SpainMedical Research: What is the background for this study?Response: Drug resistance is complicating the treatment of parasitic diseases including African trypanosomiasis, a fatal disease if left untreated. Development of a vaccine is unlikely due to parasite antigenic variation. Current chemotherapy relies primarily on four drugs. Three of these drugs access the cell’s interior through surface transporters and resistance mechanisms are largely associated with loss-of-function mutations in the involved surface drug transporters.
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MedicalResearch.com Interview with:
Brett King, M.D., Ph.D.
Assistant Professor of Dermatology
Yale University School of Medicine
Medical Research: What is the background for this...
MedicalResearch.com Interview with:
Dr. Carsten Lennerz
Deutsches Herzzentrum
München
Medical Research: What is the background for this study? What are the main findings?Response: The number of cardiovascular implantable electronic devices (CIEDs) is increasing. Worldwide more than 4 million people rely on an implanted pacemaker (PM) or implantable cardioverter defibrillator ICD. Sensing intrinsic cardiac electrical activity is the core principle of all CIED devices, however in case of electromagnetic interference (EMI) exogenous electric and magnetic fields can be picked up by the sensing circuit and mistakenly interpreted as a cardiac signal by the CIED. PM can respond to EMI with pacing-inhibition, leading to bradycardia or asystole and resulting in syncope. In ICDs EMI may be detected as a life threatening ventricular arrhythmia with the subsequent delivery of inappropriate shocks.
Early studies on EMI, run more than 10 years ago, have identified mobile phones as a source of EMI with pacemakers. Based on these pacemaker studies the CIED manufacturer and the regulatory authorities (e.g. Food and Drug Administration [FDA]) currently recommend a safety distance, i.e. hold the phone to the contra-lateral ear and avoid placing a turned-on phone next to the generator pocket.
In the meantime telecommunication and the CIED techniques have dramatically evolved. The classic mobile phone has been replaced by modern smartphones, furthermore the network standards have changed from GSM to UMTS (3G) and LTE (4G). New cardiac devices are now in use including more devices for cardiac resynchronisation therapy (CRT) or for the protection from sudden cardiac death (ICD); some of them are even compatible for MRI diagnostics.
With the use of a hemertic titanium shell, new filtering properties of the feed-throughs, sense amplifiers and noise protection algorhythms as well as the predominant use of bipolar leads the CIED may be better shielded against external influences and adverse effects of EMI.
In light of the above, the purpose of our study was to evaluate if previous precautions recommended to cardiovascular implantable electronic devices recipients are still up-to-date or if they can be abandoned. By today there are neither studies focusing on EMI between modern smartphones and modern CIEDs nor on newer mobile network standards (UMTS or LTE).
In a cross-sectional study we enrolled 308 patients and exposed them to the electromagnetic field of three smartphones (Samsung Galaxy 3, Nokia Lumia, HTC One XL) by placing the handhelds directly over the pulse generator. Installing an own base mobile network station we ensured that each smartphone went through a standardized protocol that included the entire calling process (connecting, ringing, talking), the handovers between all current network standards (GSM, UMTS, LTE where applicable) and operation at maximal transmission power.
More than 3.400 tests on electromagnetic interference were performed. One out of 308 patients (0.3%) was repeatedly affected by EMI caused by smartphones. The patient’s MRI compatible CRT-defibrillator malfunctioned with short-term ventricular and atrial oversensing when exposed to Nokia or HTC smartphones operating at GSM and UMTS. (more…)
MedicalResearch.com Interview with:
Dr Matthew Miller
Department of Health Science Northeastern University
Department of Health Policy and Management,
Harvard T.H. Chan School of Public Health Harvard University
Boston, Massachusetts
and Yi-Han Sheu
Department of Epidemiology
Harvard T.H. Chan School of Public Health
Harvard University Boston, Massachusetts
Medical Research: What is the background for this study?
Response: Selective serotonin reuptake inhibitors (SSRIs) were recently approved by the FDA to treat vasomotor symptoms associated with menopause. No prior study has directly examined whether fracture risk is increased among perimenopausal women who initiate SSRIs or among a population of women without mental disorders more generally..
Medical Research: What are the main findings?
Response: We found that SSRIs treatment for non-psychiatric conditions at doses customarily used to treat depression is, all else equal, associated with higher rates of fractures -- an effect that first became evident several months after beginning treatment and, importantly, persisted over the five year study period.
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MedicalResearch.com Interview with:
Todd Morgan, Ph.D.
Chief Scientific Officer
L-Nutra, Inc
Culver City, CA 90232
Medical Research: What is the background for this study?
Dr. Longo:...
MedicalResearch.com Interview with:
Dr. Bernadette Boden-Albala MPH, DrPHAssociate Dean of Program Development
NYU’s College of Global Public Health
Medical Research: What is the background for this study? What are the main findings?
Response: Stroke is a leading cause of morbidity and mortality globally and in the US. The US Food and Drug Administration has approved tissue plasminogen activator (tPA) as treatment for acute ischemic strokes within 3 hours of the onset of stroke symptoms. However, less than 25% of eligible stroke patients arrive to an emergency department (ED) in time to receive treatment with tPA. Our study, the Stroke Warning Information and Faster Treatment (SWIFT), compares the effect of an interactive intervention (II) with enhanced educational (EE) materials on recurrent stroke arrival times.
The II group included in-hospital interactive group sessions consisting of a community placed preparedness PowerPoint presentation; a stroke survivor preparedness narrative video; and the use of role-playing techniques to describe stroke symptoms. Both groups received standardized educational materials focused on being prepared to recognize and react to stroke symptoms plus a medical alert bracelet so medical professionals would recognize them as SWIFT participants.
We found that at follow-up, 42 percent of these patients arrived to the emergency room within 3 hours compared to only 28 percent at baseline, a 49 percent increase in the proportion of all patients arriving within three hours of symptom onset. Among Hispanics, there was a 63 percent increase. While there was no difference in the proportion arriving within 3 hours between intervention groups, the intensive intervention appeared to be more beneficial in those with early recurrent events within the first 30 days. (more…)
MedicalResearch.com Interview with:
Ezequiel Morsella, Ph.D.Associate Professor of Neuroscience
Department of Psychology San Francisco State University
Assistant Adjunct Professor Department of Neurology
University of California, San Francisco
Boardmember, Scientific Advisory Board
Institute of Cognitive Neurology (INECO), Buenos Aires
Medical Research: What is the background for this study? What are the main findings?
Dr.Morsella: The theoretical framework, Passive Frame Theory, builds on an action-based, theoretical project that first appeared in Psychological Review, in 2015.
The framework is a synthesis of hypotheses from disparate fields. It reveals that consciousness serves as a frame that constrains and directs skeletal muscle output, thereby yielding adaptive behavior. From this unique, action-based perspective, consciousness is in the service of the somatic nervous system. How consciousness achieves this is more counterintuitive, ‘low level,’ and passive than the kinds of functions that theorists have attributed to consciousness.
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MedicalResearch.com Interview with:
Katherine Ahrens Ph.D. MPH
National Center for Health Statistics
Centers for Disease Control and Prevention
Hyattsville, MD
Medical Research: What is the background for this study? Dr. Ahrens: In 2008, the American Academy of Pediatrics (AAP) revised their recommended minimum daily intake of vitamin D for infants and children to 400 IU.
Medical Research: What are the main findings?
Dr. Ahrens: Approximately one quarter of US infants aged 0 to 11 months met the 2008 AAP vitamin D recommendations on a given day in 2009 to 2012. Fewer than 1 in 5 breastfed infants met the vitamin D recommendations compared to nearly 1 in 3 non-breastfed infants. (more…)
MedicalResearch.com Interview with:
Prof. Jason Smith
Consultant in Emergency Medicine, Derriford Hospital, Plymouth, UK
Royal College of Emergency Medicine Professor
Defence Professor of Emergency Medicine, Academic Department of Military Emergency Medicine, Royal Centre for Defence Medicine, UK
Honorary Professor in Emergency Medicine, Plymouth University Peninsula Schools of Medicine and Dentistry, UK
Medical Research: What is the background for this study?Prof. Smith: Patients commonly present to emergency departments in pain. When patients are asked about their emergency department experience, they often say that more could have been done to manage their pain.
Routine care for patients in moderate or severe pain who present to emergency departments usually involves intravenous (IV) morphine, delivered by a nurse. There may be a delay when patients are admitted to a hospital ward before they are reviewed by the admitting medical team, when their pain needs are reassessed.
Patient controlled analgesia (PCA) is used to good effect elsewhere in the hospital.
The aim of this study was to compare PCA with routine care in patients presenting to emergency departments with either traumatic injuries or non-traumatic abdominal pain, who require admission to hospital.
Medical Research: What are the main findings?Prof. Smith: We found that significant reductions in pain were possible using patient controlled analgesia in patients with abdominal pain. Patients spent significantly less time in moderate or severe pain, and were more likely to be very or perfectly satisfied with their pain management.
In patients with traumatic injuries, a modest (but non-significant) reduction in pain was seen in patients allocated to the PCA group compared with the routine care group. Patients in the PCA group were more likely to be very or perfectly satisfied with their pain management. (more…)
MedicalResearch.com Interview with:
Barbara W. Trautner, MD, PhD
Houston Veterans Affairs Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center
Section of Infectious Diseases
Department of Medicine
Baylor College of Medicine, Houston, Texas
Medical Research: What is the background for this study? What are the main findings?
Dr. Trautner: Reducing antimicrobial overuse, or antimicrobial stewardship, is a national imperative. If we fail to optimize and limit use of these precious resources, we may lose effective antimicrobial therapy in the future. CDC estimates that more than $1 billion is spent on unnecessary antibiotics annually, and that drug-resistant pathogens cause 2 million illnesses and 23,000 deaths in the U.S. each year. The use of antibiotics to treat asymptomatic bacteriuria (ASB) is a significant contributor to antibiotic overuse in hospitalized and nursing home patients, especially among patients with urinary catheters. In catheterized patients, ASB is very often misdiagnosed and treated as catheter-associated urinary tract infection (CAUTI). Therefore, we designed the “Kicking CAUTI: The No Knee-Jerk Antibiotics Campaign intervention” to reduce overtreatment of ASB and to reduce the confusion about distinguishing CAUTI from asymptomatic bacteriuria.
This study evaluated the effectiveness of the Kicking CAUTI intervention in two VAMCs between July 2010 and June 2013. The primary outcomes were urine cultures ordered per 1,000 bed-days (inappropriate screening for ASB) and cases of ASB receiving antibiotics (overtreatment). The study included 289,754 total bed days, with 170,345 at the intervention site and 119,409 at the comparison site. Through this campaign, researchers were able to dramatically decrease the number of urine cultures ordered. At the intervention site, the total number of urine cultures ordered decreased by 71 percent over the course of the intervention. Antibiotic treatment of asymptomatic bacteriuria decreased by more than 75 percent during the study. No significant changes occurred at the comparison site over the same time period. Failure to treat catheter-associated urinary tract infection when indicated did not increase at either site. (more…)
MedicalResearch.com Interview with:
Dr. Mia T. Minen, MD, MPH
Director, Headache Services
NYU Langone Medical Center
Assistant professor, Department of Neurology
Medical Research: What is the background for this study? What are the main findings?
Dr. Minen: We conducted a survey on opioid and barbiturate use among patients visiting a headache center to find out which medications they were receiving for treatment. There’s limited evidence that long-term use of these medications can help treat headaches or migraines, and even short-term use in small quantities can cause medication overuse headache. It is important to determine which providers start these medications so that educational interventions can be tailored to these physician specialties to try to prevent situations such as incorrect prescribing practices and medication overuse.
In this sample of patients from a specialty headache center, approximately 20 percent of patients -- or 1 in 5 -- were using opioids or barbiturates, and about half had been prescribed these medications at some point in the past for their headaches. These findings show that opioids and barbiturates are commonly prescribed to patients with headaches. While two-thirds of patients found opioids or barbiturates helpful, many did not like them, were limited by side effects or did not find them to be helpful. Emergency department physicians were reported to be the most frequent first prescribers of opioids and general neurologists were the most frequent prescribers of barbiturate-containing medications. Primary care physicians were also identified as frequent first prescribers of these medications.
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MedicalResearch.com Interview with:
Mitchell S. Stark
Senior Research Assistant/PhD Student
Oncogenomics Group
QIMR Berghofer Medical Research Institute
Herston, Brisbane, Australia
Medical Research: What is the background for this study?
What are the main findings?
Response: Melanomas are among the most commonly occurring cancers with the number of new cases rising each year. Melanoma is currently is listed as the 4th and 6th most common cancer in Australia and the USA with >11,000 and >76,000 news diagnoses each year. The overall 5-year survival for melanoma is 91%, which is largely due to curative surgery for early stage disease. However, cure rates are <15% if distant metastasis occurs (stage IV). We now have evidence that current therapeutic options for late stage disease are more effective if the disease is treated with a lower disease burden. 2010). Hence, melanoma must be treated in earlier stages to maximize the chances of patient survival. Therefore, the ability to identify signs of melanoma progression sooner would be a valuable clinical tool.
The use of melanoma progression markers have been used for many years however it is clear from the survival rates that melanoma must be detected before disease progresses thus highlighting that the current methods of progression detection are inadequate. We have identified a seven-microRNA panel (MELmiR-7) that has the ability to detect the presence of melanoma with high sensitivity and specificity which is superior to currently used markers for melanoma progression, recurrence, and survival. This panel may enable more precise measurement of disease progression and may herald an increase in overall survival.
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MedicalResearch.com Interview with:
Ali S. Khashan, Ph.D.
Irish Centre for Fetal and Neonatal Translational Research (INFANT)
Cork, IrelandMedical Research: What is the background for this study? What are the main findings?
Dr. Khashan: The Caesarean section rate is increasing worldwide reaching 30% in some western countries and 50% in China and Brazil. As a result, it is becoming increasingly important to understand the long-term effects this procedure may have on both mother and child. Previously, our group conducted a systematic review and meta-analysis of published literature and found birth by Caesarean to be associated with approximately 20% increased risk of autism spectrum disorder (ASD), compared to birth by vaginal delivery. This means if the risk of ASD in children born by vaginal delivery were 1%, and the association was causal, the risk of autism spectrum disorder in children born by Caesarean section is 1.2% i.e. two additional ASD cases per 1000 births. However, studies were limited, and we were unable to determine what was driving this association. In our new study, now published in JAMA Psychiatry, we investigated this issue further with the largest study on this subject to date, including all children born in Sweden between 1982 and 2010.
Our study included data on over 2.9 million people and accounted for variety of factors known to be associated with both Caesarean section and autism spectrum disorder. After controlling for known confounders, such as maternal age and psychiatric history as well as various other perinatal and socio-demographic factors, we confirmed our previous findings that birth by Caesarean was associated with approximately 20% increased risk of autism spectrum disorder, compared to birth by vaginal delivery. However, with this analysis it remained unclear whether the increased risk was due to the Caesarean section itself, or some genetic or environmental factor that we were unable to measure.
To determine if it was birth by Caesarean section or another unknown factor which led to an increased risk of ASD, we compared children with autism spectrum disorder to their non-diagnosed brothers and sisters. In other words, we analysed pairs of siblings in which one was diagnosed with ASD and one was not, to determine if birth by Caesarean was associated with increased risk of ASD within families. In this way, we attempted to indirectly account for genetic and family environment factors that are shared by siblings but we were unable to measure in the general population. In this analysis, which included data on over 13,000 sibling pairs, there was no longer any association between birth by Caesarean section and ASD.
Overall, these results indicate that though birth by Caesarean section may be associated with an increased risk of ASD, it is likely due to family factors such as genetics or environment, rather than the Caesarean section itself. These findings are more informative than many previous studies as we had the largest sample size on this topic to date and estimated the association between Caesarean section and the risk of autism spectrum disorder while comparing siblings born by different methods of delivery. This allowed us to control for many factors that other studies did not.
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MedicalResearch.com Interview with:
Ryan Vandrey, Ph.D.
Associate Professor
Behavioral Pharmacology Research Unit
Johns Hopkins University School of Medicine
Baltimore, MD 21224
Medical Research: What is the background for this study? What are the main findings?
Dr. Vandrey: The background for the study was that I have had several conversations with individuals that led me to believe that there was insufficient regulation of products of all types being sold in medical cannabis dispensaries. In order to evaluate that, we needed to do a study. We decided to test edible products because that is a growing market, and, because it involves some level of manufacturing, there is greater chance for dose variability and inaccuracy. The main finding was that the majority of products were purchased from retail stores selling cannabis products for medical use were significantly mislabeled with regards to the dose of THC and other cannabinoids.
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MedicalResearch.com Interview with:
Vanita Ahuja, MD, MPH
Department of General Surgery
York Hospital, York, Pennsylvania
MedicalResearch: What is the background for this study? What are the main findings?Dr. Ahuja: Robotic-assisted surgery has been slowly accepted within the medical community. Felger et al. (1999), Falk et al. (2000), and Loumet et al. (2000) state that specific to cardiac surgery, the advantages of the robot in coronary artery bypass grafting (CABG) and valvular operations were demonstrated with increased visualization, ease of harvest, and quality of vascular anastomoses as early as 1999. However, Giulianotti, et al. (2003), Morgan et al. (2005), and Barbash et al. (2010) suggest that although safety and efficacy are supported, it is not conclusive yet that robot-assisted surgery is cost-effective, given the high cost of the robot itself, longer operating times, and the short life of the robotic instruments. The purpose of our paper was to compare outcomes of complications, length of stay (LOS), actual cost, and mortality between non-robotic and robotic-assisted cardiac surgery.
In general surgery and subspecialties, the use of the robot has increased significantly over the past few years. It has been noted that robotic surgery improves on laparoscopic surgery by providing increased intra-cavity articulation, increased degrees of freedom, and downscaling of motion amplitude that may reduce the strain on the surgeon.
The biggest growth in robotic surgery has been seen in the fields of gynecology and urology. Recently, Wright et al. reported an increase in robotic assisted hysterectomy from 0.5 percent of the procedures in 2007 compared to 9.5 percent in 2010 for benign disease. In their study, robotic assisted surgery had similar outcomes to laparoscopic surgery but higher total cost of $2,189 more per case. In urologic surgery, Leddy et al. reported in 2010 that radical prostatectomy remains the biggest utilization of robotic assisted surgery in urology with 1% in 2001 to 40% of all cases in 2006 performed in the United States.
Utilizing a nationwide database from 2008-2011, subjects were propensity matched by 14 patient characteristics to reduce selection bias in a retrospective study. The patients were then divided into three groups by operation types: valves, vessels and other type. Univariate analysis revealed that robotic-assisted surgery, compared to non-robotic surgery, had higher cost ($39,030 vs. $36,340), but lower LOS (5 vs. 6 days) and mortality (1% vs. 1.9%, all p<0.001). For those who had one or more complications, robotic-assisted cardiac surgery had fewer complications (27.2%) to non-robotic cardiac surgery (30.3%, p < .001).
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MedicalResearch.com Interview with:
Laila Cure, Ph.D.
Assistant Professor
Dept. of Industrial and Manufacturing Engineering
Wichita State University
Medical Research: What is the background for this study? What are the main findings?
Response: It is widely known that healthcare work, particularly inpatient care work, is mostly knowledge-based. Healthcare workers are constantly assessing the clinical state of their patients and making decisions that affect their workflow. This type of work is difficult to study and organize as a whole using traditional work design techniques, which are mostly designed for routine, repetitive work. Nevertheless, there are components of inpatient work that can be improved using basic workstation design principles. Hand hygiene is one of them.
Hand hygiene is still the single most important intervention to prevent infection in hospitals. Guidelines state that health care workers should clean their hands before touching a patient, before an aseptic procedure, after body fluid exposure, after touching a patient, after touching patient surroundings. Hand sanitizer dispensers are practical resources to support hand hygiene because they can be placed almost anywhere throughout hospital units. This study aimed at determining whether “good” placement of sanitizer dispensers correlates with compliance of staff in using the sanitizer. “Good placement” was defined in terms of usability characteristics extracted from hand hygiene literature recommendations. Of the usability characteristics included in the study, visibility and accessibility had some statistical influence on improving compliance.
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MedicalResearch.com Interview with:
Dr. Ayalew Tefferi, M.D.
Department of Medicine,
Mayo Clinic
Rochester, MinnesotaMedicalResearch: What is the background for this study? What are the main findings?Dr. Tefferi: William Vainchenker discovered and reported an activating JAK2 mutation (JAK2V617F) in myelofibrosis and related myeloproliferative neoplasms in 2005 (Nature. 2005;434:1144-1148). This seminal observation led to the recognition of activated JAK-STAT as the potential disease-driving pathway in myeloproliferative neoplasms and development of several JAK inhibitors, including fedratinib, ruxolitinib and momelotinib, for treatment of myelofibrosis. In phase 2 studies, these JAK inhibitors showed similar activity in alleviating constitutional symptoms and reducing spleen size. However, none of them were able to induce complete or partial remissions or reversal of bone marrow fibrosis or significant lowering of JAK2 mutant allele burden. A subsequent phase 3 study provided the information required for FDA approval of ruxolitinib and the current phase 3 study was meant to do the same for fedratinib.
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MedicalResearch.com Interview with:Carlos J. Rodriguez, MD, MPH
Division of Public Health Sciences
Department of Medicine Wake Forest School of Medicine
Winston‐Salem, NC 27152
MedicalResearch: What prompted you to study cholesterol in the Latino population? Please explain in detail.Dr. Rodriguez: Early in my career I noted that there were race-ethnic differences in the cholesterol profile between hispanics, african americans and non-hispanic whites. Hispanics are the largest ethnic minority group in the us yet prior studies of cholesterol in hispanics were relatively small, lacked adequate representation of diverse hispanic background groups for comparisons, and were not necessarily representative of nor generalizable to the hispanic population. The hispanic/latino adults in the hispanic community health study / study of latinos helped filled this critical gap.
MedicalResearch: What do you think are the most significant findings from your study? What could have the greatest clinical implications and applications?Dr. Rodriguez: Several findings are important: less than half of those with high cholesterol were aware of their condition; less than a third of those with high cholesterol were being treated; and among those receiving treatment, only two-thirds had cholesterol concentrations that were adequately controlled.
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MedicalResearch.com Interview with:
Stephen M. Shortell, PhD, MPH, MBA
Blue Cross of California Distinguished Professor of Health Policy and Management and
Director, Center for Healthcare Organizational and Innovation Research (CHOIR)
School of Public Health
UC-Berkeley
Medical Research: What is the background for this study? What are the main findings?Dr. Shortell: To meet quality and expenditure targets, Accountable Care Organization (ACOs) need to change how care is delivered to patients to reduce preventable hospitalizations, readmissions, emergency department visits, and unnecessary tests. To do this they need to increase their engagement with patients and patient families. With support from the Gordon and Betty Moore Foundation, we undertook the study to assess the extent to which ACOs are engaging their patients and patient families and to identify some of the barriers and facilitators of such engagement. We did a survey of 101 ACOs, in-depth phone interviews with eleven ACOs and two on site visits.
Among our key findings are:
1) There are some "early adopters" of patient engagement activities with, for example, respondents reporting an average of 62 percent of primary care physicians working with patients/families to set treatment goals and 61 percent of high risk chronic illness patients participating in formal care transition programs; but
2) Only 18 percent of ACO high risk chronic illness patients participate in peer support groups or group visits, and only 24 percent of patients have access to both medical records and clinical notes in the record;
3) ACO leaders strongly believe patient activation and engagement is critical to ACO success and those who have such beliefs do have greater patient engagement at the actual point of care;
4) Engaging patients is very difficult challenging work as it often involves a total re-organization of workflow within physician practices including the re-allocation of tasks to other healthcare professionals, reorganization of time commitments, adjustment to use of electronic health records and training in communication methods.
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MedicalResearch.com Interview with:
Jessica Parsh MD
Hitinder Gurm MBBS
Department of Internal Medicineb
University of Michigan Health System
Medical Research: What is the background for this study? What are the main findings?
Response: Chronic kidney disease (CKD) is associated with adverse events after percutaneous coronary interventions (PCI). Estimated glomerular filtration rate (eGFR) is used for CKD stage classification and there are several widely used eGFR equations, including the Cockcroft-Gault, CKD-EPI, and MDRD. Others have shown that the CKD-EPI equation is more accurate, more precise and less bias. The current Kidney Disease Improving Global Outcomes (KDIGO) guidelines recommend the use of CKD-EPI. Even so, there remains wide variability among equation choice between different institutions as well as between different health care providers (physicians, pharmacists, etc). In addition, in a recent survey, up to 12% of providers were "unsure" of which equation they used. Furthermore, the FDA has no clear guidelines regarding equation selection for pharmacokinetic studies of novel medications and the equation used for development of a particular drug is not always clearly labeled on package inserts.
Using data from the Blue Cross Blue Shield of Michigan Cardiovascular Consortium for almost 130,000 patients who underwent PCI, we investigated whether use of different eGFR equations would lead to discrepant eGFR output, how this would lead to CKD stage reclassification and whether CKD stage reclassification by a certain equation led to improved risk prognostication for adverse events. We also studied how calculation of eGFR by various equations would affect drug dosing recommendations for common renally-dosed antiplatelet and antithrombotic medications. We found that there was wide discrepancy among the eGFR output of the various equations and this led to significant CKD stage reclassification (with agreement on stage classification as low as 56% for CKD-EPI and Cockcroft-Gault). Further, our data from receiver operating characteristic analysis and net reclassification index analysis support CKD-EPI as superior for risk prognostication for renal adverse outcomes of acute kidney injury and new requirement for dialysis. In regards to drug dosing, agreement between all three equations on dosing adjustment was as low as 34% (bivalirudin with eGFR cutoff < 30 ml/min/1.732).
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MedicalResearch.com Interview with:
Dr.Stacy Loeb, MD, MSc
Department of Urology, Population Health,
and Laura and Isaac Perlmutter Cancer Center
New York University, New YorkMedical Research: What is the background for this study?
Dr. Loeb: A paper published last year suggested a relationship between use of (Viagra) and melanoma. That study had only 142 cases of melanoma, and of these men 14 had used sildenafil. This study got a lot of publicity leading numerous patients to express concern over whether erectile dysfunction drugs could cause melanoma.
Our goal was to look more closely at this issue in a larger population from Sweden (including 4065 melanoma cases of whom 435 used any type of erectile dysfunction drug- Viagra, as well as Levitra and Cialis). Sweden has a national health system so we were able to access prescription records for men across the entire country, which we linked to the national registries for melanoma and basal cell skin cancer. (more…)
MedicalResearch.com Interview with:
Sean D. Pokorney, MD, MBA
Division of Cardiology, Duke University Medical Center
Duke Clinical Research Institute, Durham, North Carolina
Medical Research: What is the background for this study?
Dr. Pokorney: About 350,000 people die of sudden cardiac death in the US each year. Patients who have weakened heart function, particularly those with heart muscle damage as a result of a heart attack, are more likely to experience sudden cardiac death. Defibrillators have been around since the 1980s, and have prolonged countless lives. A previous study showed that 87% of patients who had a cardiac arrest were eligible for an implantable-cardioverter defibrillator (ICD) beforehand but did not get an ICD implanted prior to their arrest. The timing of ICD implantation is critical, as studies have not found a benefit to ICD implantation early after myocardial infarction (MI). Guidelines recommend primary prevention ICD implantation in patients with an EF ≤ 35% despite being treated with optimal medical therapy for at least 40 days after an MI. Given the need to wait for at least 40 days after an MI, ICD consideration is susceptible to errors of omission during the transition of post-MI care between inpatient and outpatient care teams. Also, the benefit of ICDs remains controversial among older patients, as these patients were underrepresented in clinical trials.
Medical Research: What are the main findings?Dr. Pokorney: We looked at Medicare patients discharged from US hospitals after a heart attack between 2007 and 2010. We focused on those patients who had weak heart function, and this left us with a little over 10,300 patients from 441 hospitals for our study. This was an older patient population with a median age of 78 years. We looked to see how many of these patients got an ICD within the first year after MI, and how many patients survived to 2 years after their heart attack. Only 8% of patients received an ICD within 1 year of their heart attack. ICD implantation was associated with a third lower risk of death within 2 years after a heart attack, and this was consistent with the benefit that were seen in the randomized clinical trials. Importantly, 44% of the patients in our study were over 80 years old, and we found that the relationship between ICD use and mortality was the same for patients over and under age 80 years. Increased patient contact with the health care system through early cardiology follow-up or re-hospitalization for heart failure or MI was associated with higher likelihood of ICD implantation. Rates of ICD implantation remained around 1 in 10 patients within 1 year of MI even among patients with the largest heart attacks and the weakest hearts (lowest ejection fractions), who were least likely to have improvement in their heart function over time. Similarly, even after excluding patients at highest risk for non-arrhythmic death (prior cancer, prior stroke, and end stage renal disease), ICD implantation rates remained around 1 in 10 patients.
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MedicalResearch.com Interview with:
Ruopeng An, PhD
Assistant Professor, Department of Kinesiology and Community Health
College of Applied Health Sciences
University of Illinois at Urbana-Champaign
Champaign, IL 61820
Medical Research: What is the background for this study? What are the main findings?
Response: Health disparity is a particular type of health difference that is closely linked with social, economic and environmental disadvantage. One fundamental goal in the Healthy People 2020 is to “achieve health equity, eliminate disparities, and improve the health of all groups”. Obesity is a leading risk factor for many adverse health outcomes such as type 2 diabetes, hypertension, dyslipidemia, coronary heart disease, and certain types of cancer. Sweeping across the nation during the past 3 decades, the prevalence of obesity increased from 15% in 1980 to 35% in 2012 among U.S. adults. The obesity epidemic is marked by salient demographic and socioeconomic disparities pertaining to gender, race/ethnicity, education, income and geographic location.
In this study, we examined the annual trends in educational disparity in obesity among U.S. adults 18 years and older from 1984 to 2013 using data from a nationally-representative health survey. We found that the obesity prevalence among people with primary school or lower education increased from 17.46% or 3.41 times the prevalence among college graduates (5.12%) in 1984 to 36.16% or 1.73 times the prevalence among college graduates (20.94%) in 2013. In any given year, the obesity prevalence increased monotonically with lower education level. The obesity prevalence across education subgroups without a college degree gradually converged since early 2000s, whereas that between those subgroups and college graduates diverged since late 1980s. Absolute educational disparity in obesity widened by 60.84% to 61.14% during 1984-2013 based on the Absolute Concentration Index and the Slope Index of Inequality, respectively; meanwhile, relative educational disparity narrowed by 52.06% to 52.15% based on the Relative Index of Inequality and the Relative Concentration Index, respectively. The trends in educational disparity in obesity differed substantially by gender, race/ethnicity, age group, and obesity severity. (more…)
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MedicalResearch.com Interview with:
Scott E. Hensley, Ph.D.
Assistant Professor
Wistar Institute
Philadelphia, PA 1910
Medical Research: What is the background for this study? What are the main findings?
Response: Previous studies documented that the the 2014-2015 H3N2 flu vaccine strain was antigenically distinct compared to most recent H3N2 flu strains. Recent H3N2 strains possess several mutation and it was previously unknown which of these mutations contributed to the 2014-2015 vaccine mismatch. We used a reverse-genetic engineering approach to identify specific viral mutations that contributed to the 2014-2015 vaccine mismatch.
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