| 摘要 |
Systems, kits, and methods for establishing percutaneous access are descr ibed. A system typically includes a deformable variable diameter cannula sle eve (DVDCS) and a guidewire. The DVDCS will generally have two states, an in itial, un-activated condition and a second, activated condition, brought abo ut and controlled under the discretion of the operator. The methods comprise creating an initial access point and tissue tract with a needle, positionin g a guidewire through the initial tissue tract, passing the deformable varia ble diameter cannula sleeve over the guidewire through the tissue tract to a target blood vessel or cavity, and activating the DVDCS to effect radial de formation of the surrounding tissue. Use of the DVDCS reduces the risk of in juring tissue surrounding the tissue tract by lessening the axial forces imp arted to the tissue. Kits comprise at least one deformable variable diameter cannula sleeve together with instructions for use.
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