Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sedation before nerve block increases risk, not pain relief

13.02.2014
New research suggests that sedating patients before a nerve block needed to diagnose or treat chronic pain increases costs, risks and unnecessary surgeries, and sedation does nothing to increase patient satisfaction or long-term pain control.

"Sedation doesn't help, but it does add expense and risk," says study leader Steven P. Cohen, M.D., a professor of anesthesiology and critical care medicine at the Johns Hopkins University School of Medicine. "In some places, every patient is being sedated. Our research shows it should be used very sparingly."

Nerve blocks, performed by injecting anesthetics and/or steroids into any number of areas of the body, from the spinal column to the hip joint, are often performed ahead of surgery and in addition to other invasive procedures, such as the ablation of nerves to treat arthritis in the back, to more accurately pin down the source of pain. If the nerve block fails to numb pain, surgery or the nerve ablation may not help. Increasingly, physicians have used light or even deep sedation in a bid to ease anxiety and pain while the injection is given.

However, results of the new study, reported online Feb. 13 in the journal Pain Medicine, show that sedation before a nerve block significantly increases false-positive results, which means patients are more likely to be sent in for surgeries and other procedures that won't cure the underlying pain. Another worry, Cohen says, is the health risk when someone is sedated.

Cohen and researchers from several other medical centers in the United States recruited 73 patients with back or limb pain who were scheduled to receive multiple nerve blocks. Roughly half of the group received the first injection with sedation and the second without. The remaining patients received their injections in the opposite order. Patients were given six-hour pain diaries, a routine step that helps patients determine whether the injections bring relief, and were asked to rate their satisfaction with the treatment. They were also seen a month later and asked to rate their pain and function after the treatment.

Although the sedated patients reported less pain immediately after the nerve block injection, on every other measure — from 30-day pain assessments to overall patient satisfaction — the results were the same whether or not they were sedated.

"A lot of cost for very little benefit," Cohen says.

The increase in false-positive results — the belief that the pain has been relieved when it has not been — can result from many factors, Cohen says. The medication used for the sedation itself can have pain-relieving properties. The sedative can relax muscles. Patients may need to take extra time away from daily activities after being under anesthesia, and that rest alone could make the patient feel better.

But if patients believe that the nerve block eased their underlying pain, the physician will often conclude he or she has found the source and will move ahead with the appropriate treatment, which may include spinal fusion or radiofrequency ablation of nerves for arthritis, Cohen says. In the end, he says, many patients end up back at square one — still in pain, but having suffered through a potentially unnecessary operation.

Cohen says that while many physicians may use sedation in a sincere effort to make the procedure less traumatic for patients, there is also a perverse financial incentive to use it.

"Unfortunately, medicine in many places has become a business. The fact is, you get paid more money to do the procedure with sedation," he says. "The costs of anesthesia can be more than the fee for the procedure itself. And patients are getting harmed."

The research was funded by the Center for Rehabilitation Sciences Research, part of the Uniformed Services University of the Health Sciences in Bethesda, Md.

Haroon Hameed, M.D., and Michael E. Erdek, M.D., both of Johns Hopkins, contributed to this study, as well as researchers from Walter Reed National Military Medical Center in Bethesda; the Uniformed Services University of the Health Sciences; the Mayo Clinic in Scottsdale, Ariz.; the Cleveland Clinic in Ohio; and the University of Florida in Gainesville.

Johns Hopkins Medicine (JHM), headquartered in Baltimore, Maryland, is a $6.7 billion integrated global health enterprise and one of the leading health care systems in the United States. JHM unites physicians and scientists of the Johns Hopkins University School of Medicine with the organizations, health professionals and facilities of The Johns Hopkins Hospital and Health System. JHM's vision, "Together, we will deliver the promise of medicine," is supported by its mission to improve the health of the community and the world by setting the standard of excellence in medical education, research and clinical care. Diverse and inclusive, JHM educates medical students, scientists, health care professionals and the public; conducts biomedical research; and provides patient-centered medicine to prevent, diagnose and treat human illness. JHM operates six academic and community hospitals, four suburban health care and surgery centers, and more than 30 primary health care outpatient sites. The Johns Hopkins Hospital, opened in 1889, was ranked number one in the nation for 21 years in a row by U.S. News & World Report.

Media Contacts:
Stephanie Desmon; 410-955-8665; sdesmon1@jhmi.edu
Lauren Nelson; 410-955-8725; lnelso35@jhmi.edu

Stephanie Desmon | EurekAlert!
Further information:
http://www.jhmi.edu

More articles from Health and Medicine:

nachricht Fiber optic biosensor-integrated microfluidic chip to detect glucose levels
29.04.2016 | The Optical Society

nachricht Got good fat?
27.04.2016 | Rheinische Friedrich-Wilhelms-Universität Bonn

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Tiny microbots that can clean up water

Researchers from the Max Planck Institute Stuttgart have developed self-propelled tiny ‘microbots’ that can remove lead or organic pollution from contaminated water.

Working with colleagues in Barcelona and Singapore, Samuel Sánchez’s group used graphene oxide to make their microscale motors, which are able to adsorb lead...

Im Focus: ORNL researchers discover new state of water molecule

Neutron scattering and computational modeling have revealed unique and unexpected behavior of water molecules under extreme confinement that is unmatched by any known gas, liquid or solid states.

In a paper published in Physical Review Letters, researchers at the Department of Energy's Oak Ridge National Laboratory describe a new tunneling state of...

Im Focus: Bionic Lightweight Design researchers of the Alfred Wegener Institute at Hannover Messe 2016

Honeycomb structures as the basic building block for industrial applications presented using holo pyramid

Researchers of the Alfred Wegener Institute (AWI) will introduce their latest developments in the field of bionic lightweight design at Hannover Messe from 25...

Im Focus: New world record for fullerene-free polymer solar cells

Polymer solar cells can be even cheaper and more reliable thanks to a breakthrough by scientists at Linköping University and the Chinese Academy of Sciences (CAS). This work is about avoiding costly and unstable fullerenes.

Polymer solar cells can be even cheaper and more reliable thanks to a breakthrough by scientists at Linköping University and the Chinese Academy of Sciences...

Im Focus: Ultra-thin glass is up and coming

As one of the leading R&D partners in the development of surface technologies and organic electronics, the Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP will be exhibiting its recent achievements in vacuum coating of ultra-thin glass at SVC TechCon 2016 (Booth 846), taking place in Indianapolis / USA from May 9 – 13.

Fraunhofer FEP is an experienced partner for technological developments, known for testing the limits of new materials and for optimization of those materials...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

The “AC21 International Forum 2016” is About to Begin

27.04.2016 | Event News

Soft switching combines efficiency and improved electro-magnetic compatibility

15.04.2016 | Event News

Grid-Supportive Buildings Give Boost to Renewable Energy Integration

12.04.2016 | Event News

 
Latest News

Winds a quarter the speed of light spotted leaving mysterious binary systems

29.04.2016 | Physics and Astronomy

Fiber optic biosensor-integrated microfluidic chip to detect glucose levels

29.04.2016 | Health and Medicine

A cell senses its own curves: New research from the MBL Whitman Center

29.04.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>