| 摘要 |
<p>The present invention is directed to new and useful methods and apparatus for preventing or lessening external bleeding or escape of other bodily fluids during surgical procedures involving incision of a blood vessel. Upon proper insertion into a blood vessel, an elongated shaft with a hollow internal channel provides a virtually normal course for the flow of blood or other fluid, and thus eliminates ischemia in organs and tissues distal from the surgical site. A valve is attached to the shaft of the apparatus via flexible tubing. The valve and tubing are in fluid communication with the hollow internal channel and allow selective delivery of fluids and drugs through the apparatus. Such a feature is utilized, for example, to infuse fluids or drugs, or to withdraw fluids for sampling during the surgery. The present invention also relates to a method for use of a vascular shunt apparatus. According to one aspect of the present invention, a surgeon selects an apparatus according to the present invention which is sized to accommodate the diameter of and flow rate through a particular vessel. The surgeon then inserts the apparatus through an incision in the vessel such that each end extends beyond the length of the incision. The surgeon may then infuse a fluid or drug into the apparatus, such as for momentarily stopping the heart in coronary bypass surgery during which time the surgeon sutures a bypass graft. The present invention may also be utilized as a stent to open the internal diameter of a vessel during a procedure.</p> |
