Catheter introducer system
First Claim
1. A catheter introducer system comprising a catheter sheath including a generally elongate body and a housing coupled to the body, the body and housing including a lumen and distal and proximal openings communicating with the lumen and configured for insertion and longitudinal movement of a catheter therethrough, the sheath including a valve with an opening configured to receive the catheter therethrough, the valve providing for a friction fit around the catheter, the friction fit being selectively adjustable to vary between a first configuration for longitudinal movement of the catheter through the valve and a second configuration for holding the catheter longitudinally in place.
2 Assignments
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Accused Products
Abstract
A catheter introducer system is provided with a catheter sheath having a valve providing for a friction fit around a catheter. The friction fit is selectively adjustable to vary between a first configuration for longitudinal movement of the catheter through the valve and a second configuration for holding the catheter longitudinally in place. The valve may includes a chuck to grip the catheter radially. The chuck may include an annular base and an opposed annular clamp, and a washer disposed between the base and the clamp. At least one of the base and the clamp may include a beveled surface that forces the washer radially inwardly as the base and the clamp are drawn together. The system also includes one or more dilators layered within the sheath. The layered dilators and sheaths are typically softer and more hydrophilic proceeding from the innermost dilator out to the sheath. The dilator may be reinforced by a wire embedded in the body of the dilator. The distal tip of the sheath may be stiffened by a ring affixed adjacent the distal end. The sheath may include in the innermost dilator a trocar formed of a flexible, hollow outer wire and an inner stiff needle, which can extend beyond the wire for piercing and be withdrawn to relax the wire for advancement of the dilator.
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Citations
39 Claims
- 1. A catheter introducer system comprising a catheter sheath including a generally elongate body and a housing coupled to the body, the body and housing including a lumen and distal and proximal openings communicating with the lumen and configured for insertion and longitudinal movement of a catheter therethrough, the sheath including a valve with an opening configured to receive the catheter therethrough, the valve providing for a friction fit around the catheter, the friction fit being selectively adjustable to vary between a first configuration for longitudinal movement of the catheter through the valve and a second configuration for holding the catheter longitudinally in place.
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8. A catheter introducer system comprising:
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a first dilator defining a generally elongate body having a distal end and a proximal end;
a second dilator defining a generally elongate body having a distal end and a proximal end, an opening adjacent each end, and an open lumen communicating with the openings, wherein the first dilator is disposed substantially within the lumen of the second dilator with the distal end of the first dilator extending through the distal opening of the second dilator;
a sheath defining a generally elongate body having a distal end and a proximal end, an opening adjacent each end, and an open lumen communicating with the openings, wherein the second dilator is disposed substantially within the lumen of the sheath with the distal end of the second dilator extending through the distal opening of the sheath. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A sheath and dilator system comprising:
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a sheath defining a generally elongate body, distal and proximal ends, openings adjacent each end, and a lumen communicating between the openings, the sheath configured for insertion into a bodily fluid vessel and for receiving a catheter through the lumen and the openings; and
a dilator defining a generally elongate body having distal and proximal ends, the dilator removably inserted through the lumen of the sheath, the dilator body being comprised of a flexible material suitable for insertion into a human blood vessel, and the dilator body further including a reinforcement. - View Dependent Claims (23, 24, 25, 26)
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27. A system of layered dilators and a sheath for percutaneous insertion of a catheter, the system comprising:
at least two dilators and a sheath, each defining distal and proximal ends, openings adjacent each ends, and a lumen communicating between the openings, the dilators and sheath arranged with one of the dilators disposed substantially within at least one other of the dilators, which in turn is disposed substantially within the sheath, the dilators and sheath ranging in size of an inner diameter from no more than about 3 french to at least about 5 french in size. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. A catheter introducer system comprising:
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a catheter sheath defining a generally elongate body with a lumen and distal and proximal openings communicating with the lumen and configured for insertion and longitudinal movement of a catheter therethrough;
a first dilator defining a generally elongate body having a distal end and a proximal end, wherein the first dilator is disposed substantially within the lumen of the sheath, with the distal end of the first dilator extending through the distal opening of the sheath, the first dilator removable from the sheath for insertion of the catheter; and
a trocar inserted through the lumen of the first dilator, the trocar including a flexible, hollow outer wire, and a stiff, inner needle with a distal end extending beyond a distal end of the wire, the needle configured for piercing through a patient'"'"'s derma and entering a blood vessel. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification