World's first medical networking and resource portal

News & Highlights
Please make use of the search function to browse preferred content
Medical News & Updates
Mar 09
Perception Of Fear In Human Sweat Explored By Rice Psychologist
When threatened, many animals release chemicals as a warning signal to members of their own species, who in turn react to the signals and take action. Research by Rice University psychologist Denise Chen suggests a similar phenomenon occurs in humans. Given that more than one sense is typically involved when humans perceive information, Chen studied whether the smell of fear facilitates humans' other stronger senses.

Chen and graduate student Wen Zhou collected "fearful sweat" samples from male volunteers. The volunteers kept gauze pads in their armpits while they were shown films that dealt with topics known to inspire fear.

Later, female volunteers were exposed to chemicals from the "fearful sweat" when they were fitted with a piece of gauze under their nostrils. They then viewed images of faces that morphed from happy to ambiguous to fearful. They were asked to indicate whether the face was happy or fearful by pressing buttons on a computer.

Exposure to the smell of fear biased women toward interpreting facial expressions as more fearful, but only when the expressions were ambiguous. It had no effect when the facial emotions were more discernable.

Chen's conclusion is consistent with what's been found with processing emotions in both the face and the voice. There, an emotion from one sense modulates how the same emotion is perceived in another sense, especially when the signal to the latter sense is ambiguous.

"Our findings provide direct behavioral evidence that human sweat contains emotional meanings," Chen said. "They also demonstrate that social smells modulate vision in an emotion-specific way."

Smell is a prevalent form of social communication in many animals, but its function in humans is enigmatic. Humans have highly developed senses of sight and hearing. Why do we still need olfaction? Findings by Chen and Zhou offer insight on this topic. "The sense of smell guides our social perception when the more-dominant senses are weak," Chen said.

Mar 09
The Affect On Children Of Parental Depression
Life is hard for the children of a parent suffering from depression. Children take on an enormous amount of responsibility for the ill parent and for other family members. It is therefore important for the health services to be aware of this and have support functions in place for the whole family, and not just for the person who is ill. This is the conclusion of a thesis from the Sahlgrenska Academy, University of Gothenburg, Sweden.

Registered Nurse Britt Hedman Ahlström has examined the way in which family life is affected when a parent is suffering from depression. Nine families, including ten children and young adults between the ages of 5 and 26, and eleven parents were included in the study.

The results show how the family's daily life changes and becomes more complicated when a parent is suffering from depression. Uncertainty about what is happening has an effect on the daily life of the entire family. Depression also means that the parent becomes tired and exhausted, which then affects and weighs heavily on the children's daily life. Depression changes the relationship between a parent and his/her children, since they no longer communicate with each other as they used to. Family interplay and reciprocity decrease. The depressed parent withdraws from the family, and the children feel that they have been left to themselves.

Daily family life becomes unfamiliar to the children

The family members try their utmost, both as individuals and together, to cope with the situation, so that daily life can be restored to a more manageable level. The children take responsibility for both the depressed parent, siblings and themselves, when they notice that the parent cannot cope.

"The toughest burden of responsibility that children take on is ensuring that the depressed parent doesn't commit suicide. So children take on an extremely heavy responsibility by monitoring and keeping an eye on the depressed parent," says Britt Hedman Ahlström.

For children, the parent's depression means both a sense of responsibility and a feeling of loneliness The feelings of responsibility and loneliness include a striving and yearning for reciprocity with the parent, and for things to return to a state of normality.

"Even if the depression goes away for a time, the family is never entirely free from anxiety over it coming back. This means that there is a prolonged period of suffering associated with depression," says Britt Hedman Ahlström.

Health services must help the whole family

Involving the entire family when a parent becomes ill is important, both for the children and the parents. It is essential to have a well-defined level of guaranteed care on how, when and from whom the families will get support. Psychiatric healthcare personnel meet people suffering from depression at an early stage, and therefore have the opportunity to focus the care on the family, in order to together identify ways of helping the family get through the depression.

"We need a new approach within the health services, in which the focus is on the family's own perspective when a parent is suffering from depression. It's vital to be aware of the whole family's needs in terms of help and support, and not just those of the person who is ill. It's particularly important to be aware of the children's situation. Research can therefore focus on how to develop various ways of providing families with care and support, and introduce them into the existing organisation, as well as evaluating the consequences for the whole family, the parents and the children," says Britt Hedman Ahlström

Mar 09
Increased Exercise In Middle Age Prolongs Life
Increased physical activity in middle age prolongs life, though it may take five to 10 years before an effect is seen, concludes a study published on bmj.com today. Physical activity is beneficial for health, but about half of all middle aged men in the West do not take part in regular physical activity. It is not yet known whether an increase in exercise later in life reduces death rates.

So researchers in Sweden examined how changes in physical activity levels after middle age influence mortality and compared them with the effect of stopping smoking.

The study involved 2,205 men aged 50 in 1970-3 and living in Uppsala, Sweden. Participants completed a survey on leisure time physical activity and were categorised into low, medium or high activity groups. Participants were re-examined at ages 60, 70, 77, and 82 years and changes in physical activity were recorded. Other information, such as body mass index, blood pressure, cholesterol levels, smoking status and alcohol use, was also collated at each survey.

At age 50, almost half of the men reported a high level of physical activity, corresponding to at least three hours of recreational sports or heavy gardening a week. Just over one third (36%) reported medium activity, corresponding to walks and cycling, and 15% were sedentary.

Overall mortality rates were highest among sedentary men and lowest among the most active men.

However, during the first five years of follow-up, the mortality rate was higher in men who had increased their level of physical activity than in men with unchanged high physical activity. But the number of such deaths was relatively small, so the researchers have not emphasised this finding.

But after 10 years, the mortality rate in these men was reduced to the same level as men with unchanged high physical activity. This reduction in mortality was similar to the effect of stopping smoking.

After adjusting for other risk factors, the researchers estimate that men who reported high levels of physical activity from age 50 were expected to live 2.3 years longer than sedentary men and 1.1 years longer than men who reported medium levels of physical activity.

Increased physical activity prolongs life among middle aged and older men, though there might be a period of 5-10 years before an effect is seen on total mortality, write the authors. This effect is the same as smoking cessation. They suggest further research should investigate whether and to what extent increased physical activity affects mortality in the period soon after the change, while the effects in other age groups and in women also need to be studied.

Mar 08
What Patients, Families And Doctors Need To Know About ChemoBrain
While surviving cancer should be an occasion for rejoicing, many people who have undergone the standard or high-dose chemotherapy to defeat the disease unfortunately suffer from a physical and mental ailment known as "chemobrain." This cognitively dysfunctional symptom ranges from fatigue and memory loss to serious learning impairment due to possible brain damage. In CHEMOBRAIN: HOW CANCER THERAPIES CAN AFFECT YOUR MIND (Prometheus Books, $18.98), a clear, concise guide for cancer patients, survivors, families, friends, and caregivers, noted science journalist Ellen Clegg provides the latest information on this much-discussed but poorly understood side effect of chemotherapy treatment, while also - in an objective journalistic fashion - giving voice to those medical professionals who remain skeptical of chemobrain.

Based on extensive and candid interviews with both those suffering from chemobrain and the physicians and scientists who have treated and studied this problem, Clegg cuts through the scientific jargon and explains in understandable terms how chemotherapy works at the most basic biological level. In doing so, she provides cancer survivors with the knowledge to understand what is happening to them and practical tips for coping with the aftermath of chemotherapy treatment.

Clegg's extensive cross-analysis of chemotherapy survivors' stories with the opinions of doctors who recognize the symptoms will provide the affirmation that so many who suffer from chemobrain so desperately need. She includes tactics for dealing with cognitive problems and other lingering side effects, strategies for multitasking at home and reentering the workforce, and even ways to deal with health insurance.

In addition to personal strategies and stories, Clegg also provides the history of the patient empowerment movement that brought chemobrain to the attention of the medical establishment in the first place. She also addresses the future of cancer research and the search for treatments that do less harm, and looks at chemobrain's implications for the mental health of developing children.

Stewart B. Fleishman, MD, Director, Supportive Services, Continuum Cancer Centers of New York: Beth Israel and St. Luke's-Roosevelt Hospitals, is a doctor at the forefront of a new movement to treat cognitive dysfunction as a real symptom with real potential solutions. "We will learn more about the causes of cognitive impairment soon, asking future patient generations to invest less of their quality of life to not only survive, but also thrive after diagnosis of cancer and its treatment," he writes in the book's foreword. "Many questions have yet to be answered. Further studies are now underway to do so."

While survivor circles have acknowledged and debated chemobrain for years, this is the first and only book to delve into the cognitive problems many patients endure when they undergo chemotherapy. CHEMOBRAIN brings together cutting-edge science, the compelling stories of adults and children who have struggled for years with cognitive dysfunction, and the coping strategies being developed on the front lines of patient care. Clegg's investigative study of chemobrain is both a required read for today's upcoming medical professionals and a gospel for those suffering with this widespread symptom as well as for caring family members.

Mar 08
Endovascular Repair Results In Decrease Of Total Aneurysm Deaths
Elective repair for abdominal aortic aneurysms (AAA) is on the rise, yet total AAA- related deaths continue to decline since the introduction of endovascular repair (EVAR), according to an ongoing, long-term research report from Beth Israel Deaconess Medical Center in Boston.

This study has been updated with the most recent AAA data Nationwide Inpatient Sample database using ICD-9 diagnosis and procedure codes thorough 2005. It evaluates the overall annual number of aneurysm repairs, AAA-related deaths and mortality rates for both elective and rupture repair, rupture diagnoses without repair, and the effect of EVAR on the annual volume of aneurysm repair and its impact on rupture occurrence. Complete details of the research have been published in the March 2009 issue of the Journal of Vascular Surgery®.

"We have found that use of EVAR, which was approved by the Food and Drug Administration in 1999, has increased steadily and in 2005 accounted for 56 percent of repairs, yet only 27 percent of the deaths for intact repairs," said senior author Marc L. Schermerhorn, assistant professor of surgery, Harvard Medical School and section chief of endovascular surgery at the center's department of vascular surgery.

The overall number of AAA-related deaths (intact repair, ruptured repair, unrepaired ruptures) from 1993 to 2005 was 79,955 and the number of annual deaths decreased by 38 percent. The updated study showed that by 2005, the mean annual number of intact repairs increased from 36,122 in the pre-EVAR era (1993-1998) to 38,901 in the post-EVAR era (2001-2005). Despite the increase in repairs, the mean annual number of deaths related to intact AAA repair decreased from 1,693 pre-EVAR to 1,207 post-EVAR. Mortality for all intact AAA repair had decreased from 4.0 percent to 3.1 percent pre- and post-EVAR yet open repair mortality remained unchanged.

The overall mean annual number of ruptured AAA diagnoses dropped from 9,979 to 7,773 and overall mean annual deaths from a ruptured AAA decreased from 5,338 to 3,901 post-EVAR. From 1993 forward, admissions for ruptured AAA diagnosis decreased 30 percent and deaths after total repairs for ruptured AAA decreased from 2,702 in 1993 to 1,605 in 2005. Also in 2005, EVAR was performed in 17 percent of ruptured AAA repairs and mortality was decreased from 42.9 in 2001 to 30.3 percent in 2005.

Mar 08
Saving Heart Attack Patients In The Middle Of The Night
When Joyce Moss recently arrived at Loyola University Hospital with a life-threatening heart attack, it took just 42 minutes to perform an emergency balloon angioplasty.

The procedure opened up an artery that was 100 percent blocked. "There was no damage to the heart because of how quick they were," said Moss, 56, of Berwyn. "I feel good."

To further improve its emergency angioplasty times, Loyola will become the first hospital in Illinois to staff a Heart Attack Rapid Response Team (HARRT) at the hospital 24 hours a day, seven days a week. The HARRT program includes board-certified and highly-experienced interventional cardiologists, nurses and technicians.

Most hospitals do not have such personnel on site during nights and weekends. Thus, precious time is lost when the team has to be called in from home. This is especially true when staffers are delayed by snow storms or other bad weather.

"The HARRT program will provide the next leap of care for patients," said Loyola interventional cardiologist Dr. Fred Leya. Leya is among a team of interventional cardiologists who will rotate night and weekend shifts at the hospital. Leya is medical director of Loyola's cardiac catheterization lab.

Reducing angioplasty times is a coordinated effort that begins with paramedics who take patients to the hospital. There are 51 west suburban fire departments and ambulance companies in the Loyola Emergency Medical Services System. A growing number of ambulances are being equipped so that paramedics can administer 12-ead EKG exams while en route to the hospital. An EKG can confirm a heart attack, and results are radioed ahead to the hospital, said Dr. Mark Cichon, Loyola's director of emergency medical services.

Once a heart attack is confirmed, it takes less than five minutes to prep the patient. The interventional cardiologist then threads a catheter (thin tube) from an artery in the groin to the heart. The cardiologist inflates a balloon at the tip of the catheter to open the artery. In many cases, the cardiologist places a stent (wire mesh tube) to keep the artery open.

The doctor must be fast and accurate. "You become very focused," said interventional cardiologist Dr. Bruce Lewis. "It's like shooting a three-pointer with two seconds to go, except that you can't afford to miss." Lewis is a professor in the division of cardiology at Stritch.

Experience helps improve outcomes. Interventional cardiologists on the HARRT team each perform approximately 300 angioplasties per year. "We have seen just about every permutation," Lewis said.

A task force of the American College of Cardiology and American Heart Association recommends that a patient undergoing a heart attack receive a balloon angioplasty as soon as possible or at least within 90 minutes of arriving at the hospital -- known as the door-to-balloon time. Speed "is of central importance because the benefits of therapy diminish rapidly with delays in treatment," the task force said in a November, 2008 statement published in the heart association journal Circulation.

During a heart attack, a blockage in an artery stops blood flow. Heart muscle begins to die due to lack of blood and oxygen. An emergency angioplasty can reopen a blocked artery and restore blood flow. The procedure does the most good if done within one hour of the patient's arrival, known as the Golden Hour. After three hours, there may not be enough benefits to justify the risks of the procedure.

"Time is heart muscle," said Dr. David Wilber, director of Loyola's Cardiovascular Institute. "The sooner we can open the artery, the better."

A balloon angioplasty is the most effective way to reopen an artery, according to a review of 23 studies published in the British medical journal Lancet. In the studies, heart attack patients were randomly assigned to receive a balloon angioplasty or an intravenous clot-busting drug such as streptokinase. Among patients receiving clot-busting drugs, 14 percent died or suffered a stroke or subsequent heart attack, compared with only 8 percent in the angioplasty group.

Loyola is among a small but growing number of hospitals that are establishing around-the-clock angioplasty teams. Other hospitals include Detroit Medical Center, Vanderbilt Medical Center in Nashville, Tn. and Aurora St. Luke's Medical Center in Milwaukee. Detroit Medical Center has cut its door-to-balloon time to 47 minutes.

"There is increasing evidence that timely angioplasty not only results in better patient outcomes, but may actually reduce overall health care costs in the long run by cutting down the need for later diagnostic procedures, interventions, and hospitalizations." Wilber said. "This is achieved despite the additional effort and expense on the front end. As physicians and hospitals strive to improve the quality of care while controlling long-term costs, it is likely that more centers will adopt these programs."

In Moss' case, there was a blockage in a branch to one of her major heart arteries. After reopening the blockage, Lewis placed a stent. An echocardiogram later found there was no significant damage to her heart muscle.

Moss' heart attack occurred while she was driving to her job as a school bus driver. She said it felt like there was a 50-pound weight on her chest. Her left arm went numb and fell off the steering wheel. She was sweating and nauseous. She pulled off the road and called 911. "I knew it was a heart attack," she said.

Moss, who has six children and 11 grandchildren, said "It's good to still be here."

Loyola University Health System board member James Dowdle and his wife, Sally, have pledged $500,000 to help offset the initial costs of opening the program. The Dowdles have donated more than $2 million to LUHS and to Loyola University Chicago. James Dowdle, a retired executive vice president of the Tribune Co., is the 2001 recipient of the Sword of Loyola, the highest honor of Loyola University Chicago. Sally Dowdle has served as co-chair of the hospitality committee of the Stritch School of Medicine's annual award dinner.

Loyola is a nationally recognized center of excellence for heart and vascular care. It is the only Illinois hospital to be named to the Thomson Reuters 2008 list of the nation's top 30 teaching hospitals with cardiovascular residency programs. And U.S. News and World Report consistently ranks Loyola's heart program as one of the best in the country.

Mar 08
New Research Sheds Light On How Stem Cells Turn Into Blood Cells
Researchers funded by the Canadian Cancer Society have discovered how certain messages that are carried within stem cells can trigger those cells to become blood cells. The findings were published online on the 5th March 09 in Cell Stem Cell.

"This finding is exciting because it may provide a new way to make blood from human stem cells that could be used to regenerate the blood system in patients, including those with leukemia or those undergoing cancer treatments that indirectly destroy the immune and blood system," says Dr. Christine Williams, Director of Research Programs at the Canadian Cancer Society Research Institute.

This is the first time researchers have been able to show the importance of one particular cell pathway - known as the noncanonical Wnt pathway - in prompting stem cells to specialize and become blood cells. The pathway appears to organize the stem cells so that they can respond to signals telling them what to turn into.

Dr. Mick Bhatia, who led the study, received a $750,000 grant from the Canadian Cancer Society for this research. "By directing cell differentiation, this method provides the most efficient way to produce blood cells that we are aware of to date," he says. Dr. Bhatia is director of the McMaster University Stem Cell and Cancer Research Institute.

Stem cells are the building blocks of every organ and tissue in the body. These cells have the remarkable ability to become any type of cell in the body including bone, muscle and blood cells.

Mar 08
Powder Free Gloves In Hospitals Decreases Allergy Risk
Using powder-free latex gloves rather than those with cornstarch powder greatly reduced the number of workers' compensation claims related to latex-related illness, a recent Geisinger study found.

Healthcare workers use latex gloves to reduce the spread of infection and disease when caring for patients. The gloves also protect workers from exposure to chemicals, bodily fluids and other potentially dangerous substances.

Often, a powder such as cornstarch is added to make it easier to slip on or remove the gloves. The powder provides a dry grip for contact with moist hands. The powder also makes it more difficult for gloves to tear. But, powder can aggravate latex allergies. Allergic reactions caused by latex exposure range from simple itching to anaphylactic shock.

In 2001, Geisinger Health System clinicians stopped using powdered latex gloves. A study in a recent edition of the medical journal Dermatitis examined what happened after Geisinger made the change:

-- The number of workers' compensation claims for latex illness among Geisinger employees fell from 12 per year in the five years before the transition to four-and-a-half claims per year in the four years after the transition.

-- The average workers' compensation payment to employees fell from $34,789 to $2,505.

While Geisinger's cost increased initially with the new gloves, most of that increase was offset by decreased workers' compensation claims as well as spending on water and soap to clean the powder, the study noted.

"The transition away from powdered latex gloves should decrease the chance of sensitization to the latex protein in healthcare workers," said Patricia Malerich, M.D., primary study author and Geisinger dermatologist. "Although we examined the effects on healthcare workers, we hope that this decreased exposure to latex proteins carried in powdered gloves will also lead to fewer allergic reactions in latex-sensitive patients."

Mar 05
Childhood Temperament 'Strongly Associated' With Being Out Of Work In Later Life
Children who are unhappy at school, complain of aches and pains or skip school for trivial reasons are more likely to be permanently off work sick when they are adults, new research suggests.

The research, published in the March issue of the British Journal of Psychiatry, shows a strong association between childhood temperament and sickness absence in middle age.

Researchers studied over 7,100 people who were born in Aberdeen between 1950 and 1955. During the 1960s, data was collected on the children's educational performance and how regularly they attended primary school. Teachers were asked to assess each child's behaviour, temperament and reasons for missing school. In 2001, the researchers followed up the participants to find out their current employment status.

At the 2001 follow-up, 392 of the participants (5.5%) said they were 'permanently sick or disabled'. There was no evidence that those children who were regularly absent from school because of poor physical health were more likely to be sick or disabled in later life. However, there was a link between the children's temperament at school - as reported by their teachers - and long-term sickness absence.

A quarter of the children whose teachers reported them as 'often appearing miserable, unhappy, tearful or distressed' or 'often complaining of aches and pains' were permanently sick or disabled 40 years later.

In addition, over 10% of the children whose teachers described them as 'tending to be fearful or afraid of new things or new situations' or 'tending to be absent from school for trivial reasons' were out of work in adulthood.

The researchers believe there are a 'range of vulnerabilities' established in childhood that influence behaviour in later life. For example, children who show signs of problematic behaviour and temperament may be more likely to have symptoms of depression and anxiety in later life. They may also have unexplained physical symptoms, and be less able to manage or tolerate minor discomfort and pain.

Mar 05
Stress Affects How Wounds Heal In Different Tissues
Stress is a factor in the healing of wounds, whether they be in skin or mucosal tissue, but stress affects healing in these tissues differently, according to new research conducted at the University of Illinois at Chicago.

"We believe what may improve healing in one tissue type may possibly worsen healing in a different type of tissue," says Christopher Engeland, assistant professor of periodontics at UIC. Engeland will present the findings March 5 at the American Psychosomatic Society's 67th annual meeting at the Chicago Downtown Marriott Hotel, 540 N. Michigan Ave.

In the new study, 65 UIC dental students received a small circular wound and a small longitudinal wound on the hard palate of the mouth at two different times: during the high-stress week of examinations, and during their relatively relaxed summer vacation.

The circular wound was videographed daily to monitor closure.

Biopsies from the longitudinal wound were taken 6 and 24 hours after wounding to assess the early and late stages of the inflammatory process, Engeland said. The levels of expression of eight genes involved in inflammation were determined from these biopsies.

The researchers found that wound closure was delayed during high stress. The stress of examinations was associated with a state of "hyper-inflammation" in healthy tissue and higher inflammatory responses in wounded tissue, Engeland said.

Previous studies showed that stress is associated with reduced inflammation in skin wounds, an effect that appears to be reversed in the mucosal tissue of the palate. The paradox suggests that attempts to improve healing by altering inflammation should be made in a tissue-specific manner, Engeland said.

"It is also interesting to note that the degree of inflammation in unwounded tissue was indicative of healing rates following injury," Engeland said. This suggests that healing rates might be predicted from the immune status in normal tissue prior to surgery, he said.

Browse Archive