Featured Research

from universities, journals, and other organizations

Sensor could increase safety of eye surgery

Date:
December 2, 1999
Source:
Pacific Northwest National Laboratory
Summary:
Precision is crucial during eye surgery - a slight miscalculation could result in partial blindness and damage to the retina. But a new sensor being developed at the Department of Energy's Pacific Northwest National Laboratory could reduce those risks by alerting surgeons to the location of critical retinal tissues.

Contact: Staci Maloof (509) 372-6313, staci.maloof@pnl.gov

RICHLAND, Wash. - Precision is crucial during eye surgery - a slight miscalculation could result in partial blindness and damage to the retina. But a new sensor being developed at the Department of Energy's Pacific Northwest National Laboratory could reduce those risks by alerting surgeons to the location of critical retinal tissues.

Pacific Northwest researchers have designed and built a proximity sensor that could be connected to an endoscope, the tool surgeons use when operating on the back of the eye. The sensor calculates distance of the endoscope's needle to the retina and tissue.

Pacific Northwest is teaming with Johns Hopkins University's Microsurgery Advanced Design Laboratory, or MADLAB, and Insight Instruments Inc. of Sanford, Fla., through a Cooperative Research and Development Agreement to share costs and results associated with the proximity sensor. MADLAB is expected to conduct surgical tests of the sensor, while Insight Instruments Inc. plans to incorporate the device into endoscopes it manufactures.

"Many surgeons are apprehensive to use an endoscope because they don't know the proximity of the tool to crucial eye materials," said Peter Luloh, president of Insight Instruments Inc. "This sensor could alleviate those concerns by alerting them when the tool approaches the retina, for example."

The proximity sensor also could be applied to other surgery, such as spinal operations that require surgeons to know the location of nerves.

Pacific Northwest researchers built a proximity sensor that relies on a fiber smaller than a strand of hair to transmit and receive light. The system begins by sending electricity into a laser diode, which connects to a fiber. The diode converts electricity into light, which then bounces back and forth along the fiber's walls until reaching the retina.

The retina absorbs about 80 percent of the energy and reflects the remaining 20 percent back to the proximity sensor. The reflected light travels back through the fiber to a photo diode, which converts the light into an electrical signal. An electronic circuit translates the voltage level into distance. If the distance reaches two millimeters or less, the system would trigger an audible alarm to alert the surgeon.

Pacific Northwest researchers tested this proof of concept in the laboratory in 1998. They are building a second-generation proximity sensor to incorporate issues specific to eye surgery. For example, because the eye is extremely sensitive, the laser cannot exceed 37 microwatts, or .0037 percent of one watt.

The MADLAB expects to conduct tests on patients next year. DOE funded development of the proximity sensor with $70,000.

Business inquiries on this and other PNNL technologies should be directed to 1-888-375-PNNL or e-mail: inquiry@pnl.gov.

Pacific Northwest is one of DOE's nine multiprogram national laboratories and conducts research in the fields of environment, energy, health sciences and national security. Battelle, based in Columbus, Ohio, has operated Pacific Northwest for DOE since 1965.


Story Source:

The above story is based on materials provided by Pacific Northwest National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

Pacific Northwest National Laboratory. "Sensor could increase safety of eye surgery." ScienceDaily. ScienceDaily, 2 December 1999. <www.sciencedaily.com/releases/1999/12/991201134906.htm>.
Pacific Northwest National Laboratory. (1999, December 2). Sensor could increase safety of eye surgery. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/1999/12/991201134906.htm
Pacific Northwest National Laboratory. "Sensor could increase safety of eye surgery." ScienceDaily. www.sciencedaily.com/releases/1999/12/991201134906.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Microneedle Patch Promises Painless Pricks

Microneedle Patch Promises Painless Pricks

Reuters - Innovations Video Online (Oct. 18, 2014) Researchers at The National University of Singapore have invented a new microneedle patch that could offer a faster and less painful delivery of drugs such as insulin and painkillers. Video provided by Reuters
Powered by NewsLook.com
Raw: Nurse Nina Pham Arrives in Maryland

Raw: Nurse Nina Pham Arrives in Maryland

AP (Oct. 17, 2014) The first nurse to be diagnosed with Ebola at a Dallas hospital walked down the stairs of an executive jet into an ambulance at an airport in Frederick, Maryland, on Thursday. Pham will be treated at the National Institutes of Health. (Oct. 16) Video provided by AP
Powered by NewsLook.com
Raw: Cruise Ship Returns to US Over Ebola Fears

Raw: Cruise Ship Returns to US Over Ebola Fears

AP (Oct. 17, 2014) A Caribbean cruise ship carrying a Dallas health care worker who is being monitored for signs of the Ebola virus is heading back to Texas, US, after being refused permission to dock in Cozumel, Mexico. (Oct. 17) Video provided by AP
Powered by NewsLook.com
Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

AFP (Oct. 17, 2014) All four suspected Ebola cases admitted to hospitals in Spain on Thursday have tested negative for the deadly virus in a first round of tests, the government said Friday. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins