Overview

The VASOSHIELD Pressure Controlling Syringe helps protect vessels from overdistension and potential endothelial damage during standard surgical preparation steps. It works by limiting the internal "flushing" pressure when harvested grafts are irrigated in preparation for use in coronary artery bypass graft (CABG) surgery.

Avoiding excessive pressure and limiting distension helps to maintain internal vessel integrity, which has been demonstrated to be an important factor affecting conduit quality and long-term graft patency.

Vessel flushing with uncontrolled pressure can result in injury to the endothelial lining of the conduit1,2. Maintaining endothelial integrity preserves functions that enable vessels to maintain blood flow and resist occlusion3,4.

Now harvesters and surgeons can have consistent control over vessel distension—at any stage of the preparation process. Designed specifically to deliver the benefits of vessel flushing while controlling pressure, the VASOSHIELD Pressure Controlling Syringe effectively minimizes the risk of overdistension.

[1] Manchio JF, Gu J, Romar L, et al. Disruption of graft endothelium correlates with early failure after off-pump coronary artery bypass surgery. Ann Thorac Surg. 2005;79:1991-1998.

[2] Thatte HS, Khuri SF. The coronary artery bypass conduit: I. Intraoperative endothelial injury and its implication on graft patency. Ann Thorac Surg. 2001;72:S2245-S2252.

[3] Poston RS, Kwan MH, Gu J. Role of procurement-related injury in early saphenous vein graft failure after coronary artery bypass surgery. Future Cardiol. 2006; 2:503-512.

[4] Chong CF, Ong PJ, Moat N, Collins P. Effects of hydrostatic distention on in vitro vasoreactivity of radial artery conduits.J Thorac Cardiovasc Surg. 2004;128:609-614.

      • The VASOSHIELD Pressure Controlling Syringe delivers the benefits of controlled vessel distension, while minimizing the risk of endothelial damage.
      • The VASOSHIELD Syringe provides the flexibility of three pressure settings—150, 250, or 350 mm Hg. Starting with the lowest pressure setting, users can adjust pressure in controlled increments to accommodate any situation or vessel type.
      • As the plunger is compressed, a small amount of solution may escape from the back of the VASOSHIELD syringe.
      • Each order contains 5 VASOSHIELD Syringes per package.

Follow these easy steps to use the VASOSHIELD Pressure Controling Syringe

1. Choose the pressure setting

  • The VASOSHIELD Syringe is packaged fully assembled and pre-set for use at 150 mm Hg

To change the pressure setting, if desired, follow these steps:

A. Gently grasp the pressure setting ring with the index finger and thumb. The pressure setting ring will move more easily if held gently.

B. To unlock the pressure setting ring from the current setting: Slide the ring toward the syringe tip and then rotate it out of the setting position.

C. To select the new pressure setting: Slide the pressure setting ring to position over the desired setting marking.

D. To lock the pressure setting ring at the new pressure setting: Rotate the ring into the setting position and then slide it away from the syringe tip.

E. Verify that the setting value is visible through the pressure setting ring window to ensure that it is correctly selected and locked for proper function.
 
Note: For routine use during vessel preparation and irrigation, always use the lowest setting possible.

2. Prime the VASOSHIELD Syringe

  • Fill the VASOSHIELD Syringe in the same manner as a standard syringe per standard protocol
  • Prime the device by placing a finger over the end of the Luer-Lock tip and compressing the plunger until the check valve is released—a small amount of solution will escape from the back of the VASOSHIELD Syringe

3. Prepare and irrigate vessel

  • After the VASOSHIELD Syringe has been primed, confirm that it is set to the desired pressure setting
  • Use the device in the same manner as a standard syringe for the preparation and irrigation of the vessel

Note: The pressure setting ring locks in position at each setting, and must be unlocked to change the setting.

How to order

To place an order or learn more about any of the Maquet products, related accessories, or therapeutic solutions, please contact your local sales representative.