Frostbite patients may benefit from innovative fluorescence imaging technology

Major advancement allows physicians to visualize blood flow with handheld device at bedside

Physicians at Hennepin Healthcare have a new tool to help make life and limb-saving decisions in patients being evaluated for frostbite injury and other tissue perfusion concerns. Stryker’s SPY-PHI is a hand-held device that was made to be used in a surgical setting to visualize the quality of blood flow in vessels and micro vessels that provide oxygen to organs. HCMC is the first hospital in the state to implement this advanced technology in an acute setting.

“We’ve already realized SPY’s benefits when evaluating exposure patients for frostbite injury,” explains HCMC emergency physician Dr. Thomas Masters. “It may help physicians determine when the use of clot-busting medications is indicated, as well as when it’s not.”

SPY-PHI uses a near-infrared low powered laser light source to stimulate a fluorescent imaging agent that has been injected into the blood stream. The fluorescent agent binds to the proteins in blood and circulates through the body. When stimulated by near infrared light, the protein-bound agent emits a fluorescence signal which enables visualization of blood flowing through vessels and into tissue. The fluorescence is captured by a special camera, is processed and is displayed on a video monitor for the physician to review. Since the agent is bound to blood, where blood goes, it goes. If there is no fluorescence, it can mean that there is compromised blood flow.

“We hope that eventually it may have applications for crush injuries, necrotizing fasciitis, and other types of wounds,” said Dr. Masters.

Unlike traditional bone scans, which can be time-consuming to perform in an emergent situation, SPY technology does not involve ionizing radiation and utilizes a fluorescence imaging agent with a short half-life thus allowing surgeons to repeat perfusion assessment as needed.  

HCMC is a nationally recognized Level I Adult Trauma Center and Level 1 Pediatric Trauma Center with the largest emergency department in Minnesota. It is operated by Hennepin Healthcare System, Inc., a subsidiary corporation of Hennepin County. The comprehensive academic medical center and public teaching hospital and clinic system includes a 484-bed acute care hospital, primary care and specialty clinics located in Minneapolis and surrounding suburban communities, as well as home care and hospice services.

Cold truths about hypothermia

111960627Every Minnesotan is familiar with piling on coats, hats, mittens and other clothing to stay protected from the elements during the winter months. Hypothermia — literally meaning “low (body) temperature” —  occurs when too much heat escapes the core of the body and cannot be replaced quickly enough. It can affect someone’s mental and physical abilities and eventually be fatal if not treated. Hypothermia sets in very slowly, so those affected often do not realize they need help or medical attention. 

No one plans to become hypothermic; car trouble, walking home from a party, or a slip and fall on the ice are just a few ways people inadvertently get over-exposed to the harsh cold.

Continue reading “Cold truths about hypothermia”