Breaking News
September 24, 2018 - Transcatheter mitral-valve repair in patients with heart failure
September 24, 2018 - Study opens new avenues for treatment of Laing distal myopathy
September 24, 2018 - Stroke Facts | cdc.gov
September 24, 2018 - Sarcolipin tricks muscle cells into using more energy, burning fat
September 24, 2018 - Enrollment in opioid controlled substance agreement reduces primary care visits
September 24, 2018 - UTA researchers patent new smart seat cushion technology that helps prevent painful ulcers
September 24, 2018 - Second HPV-Related Primary Cancers Common in Survivors
September 24, 2018 - How a virus destabilizes the genome
September 24, 2018 - Old letters provide insight into Spanish flu pandemic horror
September 23, 2018 - Smart textile-based soft robotic exosuit helps wearers save energy and traverse difficult terrain
September 23, 2018 - New research hub to drive radical change in development and manufacturing of vaccines
September 23, 2018 - AHA: For Hispanics, Neighborhood May Be Key Factor in Heart Disease Risk
September 23, 2018 - Excessive airway nerves tied to more severe asthma symptoms, study finds
September 23, 2018 - Study highlights need to remain vigilant in maintaining key infection control processes
September 23, 2018 - Novel therapeutic strategy for blood vessel related disorders, such as cancer and retinopathy
September 23, 2018 - New naturally occurring antibiotic found effective against Mycobacterium tuberculosis
September 23, 2018 - First-in-human phase 0 study shows clinically-relevant activity of new drug in glioblastoma
September 23, 2018 - Removing tobacco product display from shops reduced number of children buying cigarettes
September 23, 2018 - Random fraction of specialized immune cells leads the charge in battling invaders
September 23, 2018 - Few minutes of sprinting exercise may be as effective as longer exercise sessions
September 23, 2018 - Researchers use neutrons to make first direct observations of water in lipid bilayers
September 23, 2018 - Researchers demonstrate pre-clinical success for universal flu vaccine in new paper
September 23, 2018 - Study reveals surprising gaps in some HIV medical providers’ knowledge of ACA
September 23, 2018 - Oxehealth secures European medical device accreditation for vital signs measurement software
September 23, 2018 - HTN Tx Intensification Common Upon Discharge in U.S. Vets
September 23, 2018 - Fibre can strengthen the intestinal barrier
September 23, 2018 - New platform examines infectious pathogens that may spread from animals to humans
September 23, 2018 - Demographers create detailed color map of population aging in Europe
September 23, 2018 - New type of fatty acid can slow down overreactive immune system
September 23, 2018 - Innovative procedure could provide breakthrough in treating early-stage lung cancer
September 23, 2018 - Research finds drop in number of measles cases in the EU/EEA since March 2018
September 23, 2018 - Researchers acquire new insights into DNA polymerases
September 23, 2018 - Alzheimer’s diagnosis might become simpler with new brain imaging method
September 23, 2018 - Reports Warn of Growing Opioid Crisis Among Seniors
September 23, 2018 - Researchers unravel why people with HIV suffer from more neurologic diseases
September 23, 2018 - Human brain structured to make best possible decision with limited resources
September 23, 2018 - KHN’s ‘What the Health?’ Health on the hill
September 23, 2018 - Bad air and inadequate data prove an unhealthy mix
September 23, 2018 - Regular bedtime and wake time important for heart, metabolic health even among adults
September 23, 2018 - HIV and a tale of a few cities
September 23, 2018 - NIH launches clinical trial to test infusions of combination antibodies in people with HIV
September 23, 2018 - Researchers develop new system to detect consumption of synthetic cannabinoids
September 23, 2018 - Vax-Hub to influenze radical change in development and manufacturing of vaccines
September 23, 2018 - People who have slept lesser than seven hours have higher risks of car crashes
September 23, 2018 - an ancient art may work best to prevent falls in old age
September 23, 2018 - Consumption of foods with lower nutritional quality related to increased cancer risk
September 23, 2018 - Patient Health Information Often Shared Electronically
September 23, 2018 - Can machine learning bring more humanity to health care?
September 23, 2018 - Body organs undergo structural changes in response to diet
September 23, 2018 - Genetic polymorphisms linked with muscle injury and stiffness
September 23, 2018 - As states try to rein in drug spending, feds slap down one bold Medicaid move
September 22, 2018 - Why Eczema Is Tougher to Treat for Black Patients
September 22, 2018 - Team reveals that human genome could contain up to 20 percent fewer genes
September 22, 2018 - USC research uncovers previously unknown genetic risk factor for Alzheimer’s disease
September 22, 2018 - Novel method achieves accurate and precise temperature estimation in fat-containing tissues
September 22, 2018 - BSI accredits Oxehealth’s vital signs measurement software as Class IIa medical device
September 22, 2018 - Evolution of psychiatric disorders and human personality traits
September 22, 2018 - Obesity in early puberty doubles asthma risk for boy’s future offspring
September 22, 2018 - World’s most advanced real-time patient monitoring platform receives key US patent
September 22, 2018 - Study explores connection between sexuality and cognitive status in older adults
September 22, 2018 - LSTM partners with TB Alliance to develop novel TB drug regimens
September 22, 2018 - Annual wellness visits improve delivery of preventive services in elderly population
September 22, 2018 - CHMP provides positive opinion to Cabometyx for previously-treated patients with hepatocellular carcinoma
September 22, 2018 - Hispanic communities with high proportions of Hispanics face more cardiovascular-related death
September 22, 2018 - Vici syndrome – Genetics Home Reference
September 22, 2018 - Single-dose drug can shorten flu symptoms by about a day, studies suggest
September 22, 2018 - AMSBIO launches circulating tumor DNA Reference Standards
September 22, 2018 - Sandalwood mimicking odorant could stimulate hair growth in humans
September 22, 2018 - Overlooked immune cells could play a key role in cancer immunotherapy, claims new study
September 22, 2018 - Study reveals prevalence of diagnosed type 1 and type 2 diabetes among American adults
September 22, 2018 - Researchers develop fast detection strategy to know type of virus acquired by patients
September 22, 2018 - Global Prevalence of Insufficient Activity 27.5 Percent
September 22, 2018 - Strategies to protect bone health in hematologic stem cell transplant recipients
September 22, 2018 - Brigham Genomic Medicine program unravels 30 medical mysteries
September 22, 2018 - New system harnesses power of bubbles to destroy dangerous biofilms
September 22, 2018 - Inflammation plays crucial role in preventing heart attacks and strokes, study reveals
September 22, 2018 - Calorie dense, nutrient deficient meals common across the world
September 22, 2018 - Researchers develop technology to study behavior of implants without animal testing
September 22, 2018 - First gut bacteria in newborns may have lasting effect on ability to ward off chronic diseases
September 22, 2018 - Detection of BFD virus in parrots in 8 new countries raises concerns for threatened species
New study offers added hope for patients awaiting corneal transplants

New study offers added hope for patients awaiting corneal transplants

image_pdfDownload PDFimage_print
Credit: Case Western Reserve University

New national research led by Jonathan Lass of Case Western Reserve University School of Medicine has found that corneal donor tissue can be safely stored for 11 days before transplantation surgery to correct eye problems in people with diseases of the cornea. This is four days longer than the current conventional maximum of seven days in the United States.

The findings are published in JAMA Ophthalmology.

“Over the past 20 years, corneal transplant specialists have gotten comfortable only using corneas up to one week after they are stored. But our findings show they can safely use them up to 11 days after first being stored,” said Lass, the Charles I Thomas Professor in the Department of Ophthalmology and Visual Sciences at Case Western Reserve School of Medicine. “This will help to meet the expected future demand for corneas in this country as well as in patients overseas today, who now receive as many as 30 percent of corneas donated by U.S. citizens.”

Patients who need corneal transplants are typically age 50 and older. According to projections by the U.S. Census Bureau, that population will grow from about 109 million currently to about 133 million by 2030 in this country.

The cornea, the eye’s clear outer covering, helps focus light so people can see clearly. When it is damaged, incoming light can become distorted, harming quality of vision and often resulting in blindness.

Damage can arise from scarring due to:

  • previous surgery, injury or infection;
  • corneal ulcers;
  • swelling or thinning of the cornea; and
  • inherited diseases and conditions of the eye, such as Fuchs’ dystrophy.

When the blurred vision and/or pain are serious enough, transplantation of a new cornea may be necessary. Transplanted corneas come from people who chose to donate them when they died.

In the study—which includes 18 other authors—70 eye surgeons at 40 surgical sites nationwide performed a corneal transplant called a Descemet stripping automated endothelial keratoplasty (DSAEK) on 1,090 people (1,330 eyes). In this procedure, doctors or the eye bank take a slice from the back of a healthy donated cornea, open a small slit in the patient’s eye, scrape out the diseased endothelial cells and replace them with the donor cells.

The majority of the patients underwent transplantation for Fuchs’ dystrophy, which causes a gradual decline in vision due to corneal swelling and clouding. Patients were randomly assigned to one of two treatment groups: those who received corneas preserved for up to seven days and those who received corneas preserved for eight-14 days.

Lass and the surgeons found that three-year graft success rates were 92.1 percent for corneas preserved for eight to 14 days and 95.3 percent for corneas preserved up to seven days. Probing further, they discovered that there was no statistically significant difference between patients who received corneas preserved up to seven days and those who received ones preserved eight to 11 days. Rather, much of the difference between the groups was attributed to those who received corneas preserved 12 to 14 days.

“It’s important to note that patients who received corneas preserved 12 to 14 days still had high success rates of 89.3 percent,” said Lass. “This means that if individual circumstances require it, these longer-preserved corneas may be used with a high degree of success.”

Currently, the supply of donated corneas is sufficient to meet the demand in the U.S. In fact, more than a third of donated U.S. corneas are sent to patients in need internationally. But while U.S. eye banks provided about 28,000 corneas for use by patients in other countries in 2015, there are 10 million cornea-blind individuals worldwide.

Although results of the study directly apply only to the use of donor corneas used for this specific operation and these conditions, researchers hope that results could be extended to donor corneas used for other types of transplants and other eye diseases.

Separately, the investigators assessed the degree of corneal endothelial cell loss, which typically occurs after transplantation. The endothelium is a single layer of cells lining the inner surface of the cornea; among its functions, it helps keep the cornea clear and from not swelling.

The surgeons found that in corneas preserved up to seven days, there was a 37 percent loss of cells versus a 40 percent loss in corneas preserved eight-14 days. Again probing further, they discovered a comparable rate of loss in corneas preserved four-13 days.

“This finding also supports the use of corneas stored up to and including 11 days,” said Lass.


Explore further:
Study finds donor corneas can be safely preserved for longer period

Journal reference:
JAMA Ophthalmology

Provided by:
Case Western Reserve University

Tagged with:

About author

Related Articles