Vascular Surgery Archives

VASOSHIELD Pressure Controlling Syringe for CABGs to Go on Trial

by Gene Ostrovsky on Jun 14, 2011 •

buiydei VASOSHIELD Pressure Controlling Syringe for CABGs to Go on Trial
wejgg3 VASOSHIELD Pressure Controlling Syringe for CABGs to Go on Trial MAQUET is starting a trial of its VASOSHIELD Pressure Controlling Syringe, a device the company wants every cardiac surgeon to use to flush harvested saphenous veins to check for leaks before coronary artery bypass grafting.  A traditional syringe is typically used, which does not control the pressure of the liquid, often leading to tears within the intimal layer of the vessel.  The VASOSHIELD has three settings (150, 250, or 350 mm Hg) that specify the maximum pressure that will be applied.

The study will enroll 30 patients undergoing elective CABG surgery who require at least two saphenous vein bypass grafts. Obtained using endoscopic vessel harvesting (EVH) techniques, each graft will be randomly assigned to receive vessel distension by either the MAQUET VASOSHIELD device or a standard syringe. The study endpoints include histological evaluation of vein grafts, assessment of endothelial function and measurement of nitric oxide synthase (NOS) activity, and endothelium-dependent relaxation and contraction.

Link to animation demonstrating the VASOSHIELD…

Press release: MAQUET CARDIOVASCULAR INITIATES TRIAL COMPARING USE OF MAQUET PRESSURE CONTROLLING SYRINGE TO STANDARD SYRINGE IN ENDOSCOPIC VESSEL HARVESTING… (.pdf)

Product page: VASOSHIELD Pressure Controlling Syringe …

Neurological Surgery / Radiology / Vascular Surgery

GE’s AngioViz Vascular Flow Analysis Software FDA OK’d

by Gene Ostrovsky on Jun 10, 2011
GE's AngioViz Vascular Flow Analysis Software FDA OK'd

GE Healthcare received FDA approval for AngioViz software that uses Digital Subtraction Angiography (DSA) to produce an image of vascular flow within the brain or other parts of the body. Previously, DSA images provided an anatomical view of the vasculature and a radiologist had to flip through a series of them to visualize blood flow.  AngioViz provides a one shot representation that encompasses the dynamic nature of the region’s vascular flow.

AngioViz provides a new visualization of the vascular flow seen in DSA imaging utilizing a technique called parametric imaging. AngioViz looks at each pixel in the image series and determines two things—the peak value of opacification caused by the contrast, and the time it takes for that pixel to reach peak opacification. These two parameters can be displayed as separate images or combined into a single color-coded image that represents parameters of vascular flow. This enables doctors to perceive parameters of flow quickly to support decision-making. In addition, AngioViz allows easy comparison of parametric images from different DSA acquisitions, such as pre- and post-treatment images. This can help physicians understand the impact on flow dynamics of various interventional treatments.AngioViz bold flow visualization has the potential to be applied to a variety of clinical situations

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Vascular Surgery

AngioDynamics’ New NeverTouch 1470nm Laser

by Gene Ostrovsky on Jun 7, 2011
AngioDynamics' New NeverTouch 1470nm Laser

AngioDynamics has expanded its VenaCure EVLT product line for treatment of varicose veins with a new 1470nm laser. This is the first 1470nm wavelength laser of its kinds to feature a gold tip jacket.

The innovation behind the NeverTouch tip is a glass weld at the distal tip of a 600 um fiber. This weld results in an effective fiber diameter of 905 ums and lowers the actual power density by 56 percent from that of a standard bare-tip 600 um fiber. The net effect is a homogeneous ablation with less focal charring of the vein wall than that which is seen with bare-tip fibers.

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Surgery / Vascular Surgery

AngioDynamics’ New 90cm VenaCure EVLT Kit

by Gene Ostrovsky on May 31, 2011
AngioDynamics' New 90cm VenaCure EVLT Kit

AngioDynamics has released a 90 centimeter version of the company’s NeverTouch kit as part of the VenaCure EVLT system for treatment of varicose veins. The longer TRE-Sheath introducer allows surgeons to access veins above the ankle and below the knee.

Together with the 25 cm, 45 cm and 65 cm kit lengths, the new kit continues to build on the core benefits of the NeverTouch gold-tip laser fiber and VenaCure EVLT® system. The primary innovation in the NeverTouch tip is a glass weld at the distal tip of a 600 um fiber. The weld results in an effective fiber diameter of 905 ums and lowers the actual power density at the tip by 56% from that of a standard bare-tip 600 um fiber. This provides a homogeneous ablation with less focal charring of the vein wall that is typically seen with bare-tip fibers. The gold jacketed tip also maximizes tip visibility under ultrasound and eliminates chances of inadvertent fiber tip contact with the vein wall, further improving safety and patient comfort.

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Cardiology / Radiology / Vascular Surgery

Cordis Receives FDA Approval for Exoseal Vascular Closure Device

by Wouter Stomp on May 27, 2011
Cordis Receives FDA Approval for Exoseal Vascular Closure Device

Cordis has received FDA approval for its Exoseal vascular closure device. The tool, used to close the femoral artery puncture site during diagnostic angiographies and interventional procedures, employs an absorbable plug to close the vessel wall. In a clinical trial comparing the Exoseal to the traditional alternative, prolonged manual compression or compression with a clamp or bag, the Exoseal resulted in shorter time to cessation of bleeding and an almost two-third reduction in time to ambulation. The device has been available in Europe, Asia and Latin America since June 2010.

Some more information on the workings of the device from the press release:

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Radiology / Vascular Surgery

Aptus EndoStapling System Receives CE Approval

by Wouter Stomp on May 26, 2011
Aptus EndoStapling System Receives CE Approval

Aptus Endosystems has received CE Mark approval for its Aptus EndoStapling System for use in endovascular aneurysm repair (EVAR) procedures. EVAR procedures are performed to treat abdominal aortic aneurysms and are performed more and more often instead of open surgical repair. Proximally, the stent is fixated to the aortic wall to avoid migration and endoleaks. During open procedures, this is done by meticulously suturing, however during endovascular procedures only the stent’s self-fixating property prevents these complications.

The EndoStapling System uses a helical staple technology for independent endograft fixation, mimicking the hand suturing performed during open surgical repair. It can be used to repair endovascular grafts that have migrated or exhibit endoleaks, by strengthening the radial fixation and/or sealing to regain or maintain effective aortic aneurysm exclusion. It can also be used at the time of initial endograft implantation to enhance an endograft’s inherent fixation and sealing mechanisms. From the press release:

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Plastic Surgery / Surgery / Vascular Surgery

Smith & Nephew Introduces PICO Pocket-Sized Negative Pressure Wound Therapy

by Wouter Stomp on May 26, 2011
Smith & Nephew Introduces PICO Pocket-Sized Negative Pressure Wound Therapy

Smith & Nephew has received CE Mark approval for PICO, a portable single-use negative pressure wound therapy system. The pocket-sized device can be used for acute and chronic wounds, high-risk surgical incisions and skin grafts. It consists of a disposable, one-button pump, attached to a dressing which allows for fluid to be absorbed through the dressing. Cannisters are not needed and the dressing can be worn up to seven days.

 

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Cardiac Surgery / Cardiology / Radiology / Vascular Surgery

Arstasis AXERA Femoral Access Device Launched in U.S.

by Gene Ostrovsky on May 18, 2011
Arstasis AXERA Femoral Access Device Launched in U.S.

Arstasis has released its AXERA femoral artery access device that improves on the Modified Seldinger Technique by creating a shallower angle arteriotomy, which the company calls Arstaotomy. Because of greater tissue overlap, healing is accelerated and improved, and, hopefully, the number of post-op hematomas is decreased.

From the product page:

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Cardiology / Nanomedicine / Vascular Surgery

Vascular Turbine Generates Power From Arterial Blood Flow

by Wouter Stomp on May 17, 2011
Vascular Turbine Generates Power From Arterial Blood Flow

Researchers from the University of Bern and the Bern University of Applied Sciences, Switzerland, are working on small turbines designed to fit inside a human artery, like an implantable hydroelectric generator. They could potentially power pacemakers and other electrical devices within the human body. The device in its current iteration produces 800 microwatts of electricity and fits within a regular sized artery. A major concern, as with any intravascular device, is avoiding coagulation and thrombus formation due to the turbulence caused by the device. Testing still happens in the laboratory, so it will be a few years before we will be able to implant anything like this in humans. From IEEE Spectrum:

“The heart produces around 1 or 1.5 watts of hydraulic power, and we want to take maybe one milliwatt,” Pfenniger explains. “A pacemaker only needs around 10 microwatts.” At the Microtechnologies in Medicine and Biology conference in Lucerne, Switzerland, earlier this month, Pfenniger presented results from a trial in which a tube is designed to mimic the internal thoracic artery, a millimeters-wide vessel that doctors sometimes cannibalize for surgery because it is redundant. The most efficient of the three off-the-shelf turbines he tested produced around 800 microwatts, which could run devices much more power hungry than today’s pacemakers.

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