Articles

Arterial Everter

Jeffrey Plott, Adeyiza Momoh, Ian Sando, Brendan McCracken, Mohammed Tiba, Kevin Ward, Jeffrey Kozlow, and Paul Cederna
University of Michigan
Ann Arbor, MI

Microvascular anastomosis is the surgical joining, or coaptation, of small (sub-centimeter) veins and arteries with the aid of loupe or microscope magnifcation,This is accomplished using a microanas-tomotic coupling device (Synovis GEM Coupler) that reduces complication rates, improves patency rates, and substantially reduces the time necessary to complete the coaptation compared to manual suturing.

Arterial microvascular anastomoses are currently accomplished with standard manual suturing techniques — the thick wall of the artery prevents them from being stretched over the rings of a coupler As a result, arterial microanastomoses performed by manual suturing takes about 25 minutes in the operating room, versus about 5 minutes using a coupling device (for veins).

The Arterial Everter is used in conjunction with the coupler to replace traditional vessel suturing, and enable rapid anastomosis of arteries ranging from 1.5 to 4 mm in diameter. The average time to perform the anastomosis was significantly less when using the evert-er/coupler compared to manual suturing (6:35 minutes vs. 25:09 minutes, p < 0.00l).

“It is very exciting to be recognized as the Medical Category winner. This device is just one example of the strong collaboration between engineering and medicine at the University of Michigan, along with the great support of the Coulter Translational Research Partnership Program. It took the efforts of many different people and groups to get the Arterial Everter to where it is today. Our goal has always been to create something that will ultimately improve the lives of patients, and I am thrilled to see it moving rapidly in that direction.”

The Arterial Everter consists of a stainless steel rod over-molded with medical-grade silicone using traditional injection/compression molding. It will reduce leak rate, risk of vessel injury, vessel kinking, and time under anesthesia for the patient, along with being technically easier and faster for the doctor. The use of the coupler rings for arteries also adds significant clinical value because the blood flow through the anastomosis can be monitored using the Flow Coupler system.

Target users are surgeons, ENTs, and others who perform micro-surgery and reconstruction. By analyzing the cost savings of sutures and the drastic reduction in operating time, a hospital could expect to save about $1,000 per anastomosis using the Arterial Everter:

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Electroactive Material for Wound Healing

NASA Langley Research Center’s Technology Gateway
Hampton, VA

This technology uses electrical activity to facilitate the wound-healing process while protecting the wound. The bandage is made of an electroactive material that is stimulated by the heat of the body and the pressure of cell growth, thus no external power source is required.

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Kid: A Telemedicine Solution for Retinopathy of Prematurity

Erica Schwarz, Sami Messai, Becca Miller, Seony Han, Richard Chen, Aditya Murali, and Prerna Singh
Kaleyedos, San Francisco, CA

Retinopathy of prematurity (ROP) is a disease that affects premature infants. It is the leading cause of childhood blindness. Although effective treatments exist, many infants are still at-risk due to the small window of time for detection. The current standard of care consists of in-person, manual screening by a pediatric ophthalmologist. Unfortunately, the number of infants in need of screening far surpasses the availability of specifically trained ophthalmologists. Consequently, fewer than 30 percent of neonatal intensive care units (NICUs) worldwide have fully compliant ROP screening programs.

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High-Visibility Biopsy Needles

Muhammad Sadiq, Ian Quirk, and Mike Irvine
Active Needle Technology, Abingdon, Oxford, UK

Longer life expectancy in conjunction with improved knowledge of cancers has resulted in increased demands for core needle biopsies. Additionally, cancer diagnosis typically occurs earlier and hence biopsy specimens are required from smaller tissue masses.

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Quartet H2O LDD Actively Cooled Lateral Surgical Fiber Optic

Stephen Griffin
InnovaQuartz LLC, Phoenix, AZ

Infrared surgical lasers, e.g., CTH:YAG @ 2100 nm and TM:YAG @ 2000 nm, are wonderful tools for minimally invasive surgery such as laser vaporization of hyperplastic prostate tissue (BPH), but they are completely incompatible with right angle, off-axis delivery. Fiber optics find great utility for vaporization of prostate gland lobes about the urethra at less-challenging wavelengths, e.g., 532 nm, where water is transparent. The fundamental advantage of infrared lasers is strong absorption by water (within tissue), but this very absorption renders water-cooled side-firing fibers useless with these laser generators, i.e., MoXy® by Boston Scientific; where the surgical beam passes through the coaxial cooling jacket, the coolant boils and blocks further flow, overheating the device rapidly.

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