System and method for establishing vascular access
First Claim
Patent Images
1. A method for establishing vascular access, said method comprising the steps of:
- inserting an access needle and a plastically deformable, radially expandable sleeve substantially simultaneously through a percutaneous tissue tract leading to a target blood vessel so that a distal end of the sleeve lies within the blood vessel and a proximal end of the sleeve lies outside the tissue tract, wherein the radially expandable sleeve has a compliant or elastic structure so that its cross-section will collapse after expansion;
expanding the expandable sleeve to a larger diameter configuration to provide an access lumen to the blood vessel; and
locking said radially expandable sleeve to retain said larger diameter configuration.
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Abstract
Systems, kits, and methods for establishing vascular access are described. A system may include a needle, a radially expandable sleeve and a dilator. The methods include creating an initial tissue tract to a target blood vessel with a radially expandable sleeve mounted on a needle. Upon removal of the needle, the dilator is then passed through the radially expandable sleeve to effect radial expansion of the sleeve. Use of the sleeve reduces the risk of injuring tissue surrounding the tissue tract by lessening the axial forces imparted to the tissue. Kits comprise at least the radially expandable sleeve together with instructions for use.
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Citations
26 Claims
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1. A method for establishing vascular access, said method comprising the steps of:
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inserting an access needle and a plastically deformable, radially expandable sleeve substantially simultaneously through a percutaneous tissue tract leading to a target blood vessel so that a distal end of the sleeve lies within the blood vessel and a proximal end of the sleeve lies outside the tissue tract, wherein the radially expandable sleeve has a compliant or elastic structure so that its cross-section will collapse after expansion;
expanding the expandable sleeve to a larger diameter configuration to provide an access lumen to the blood vessel; and
locking said radially expandable sleeve to retain said larger diameter configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for establishing vascular access said method comprising including the steps of:
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inserting an access needle and a radially expandable sleeve substantially simultaneously through a percutaneous tissue tract leading to a target blood vessel, so that a distal end of the sleeve lies within the blood vessel and a proximal end of the sleeve lies outside the tissue tract, wherein the radially expandable sleeve includes a tubular braid which has a compliant or elastic structure and wherein the large diameter of the sleeve is maintained by an outer tube of the dilator which remains in place after the dilator is removed;
removing the needle from the tissue tract;
introducing a dilator through the expandable sleeve to increase the diameter of the expandable sleeve to a larger diameter;
removing the dilator wherein the expandable sleeve retains the larger diameter; and
locking the radially expandable sleeve to retain said larger diameter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for establishing vascular access, said method comprising the steps of:
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inserting an access needle and a plastically deformable, radially expandable sleeve substantially simultaneously through a percutaneous tissue tract leading to a target blood vessel so that a distal end of the sleeve lies within the blood vessel and a proximal end of the sleeve lies outside the tissue tract;
expanding the expandable sleeve to a larger diameter configuration to provide an access lumen to the blood vessel;
providing a locking structure to retain said expandable sleeve in said larger diameter configuration, said locking structure includes a valve disposed within said access lumen of said expandable sleeve;
locking said radially expandable sleeve to retain said larger diameter configuration. - View Dependent Claims (22, 23, 24, 25)
inserting a device through the valve; and
maintaining the valve in an open position when the device is inserted through the valve.
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26. A method for establishing vascular access, said method comprising the steps of:
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positioning an access needle and a radially expandable sleeve through a percutaneous tissue tract leading to a target blood vessel so that a distal end of the sleeve lies within the blood vessel and a proximal end of the sleeve lies outside the tissue tract;
expanding the expandable sleeve to a larger diameter configuration to provide an access lumen to the blood vessel; and
providing a locking structure to retain said expandable sleeve in said larger diameter configuration, said locking structure including a valve disposed within said access lumen of said expandable sleeve.
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Specification