Catheter guide
First Claim
Patent Images
1. A catheter placement unit having a trocar with a substantially cylidrical sheath, the improvement comprising:
- guide means having an exterior surface and an interior surface which define a guide wall therebetween with said guide wall having a normally curved cross-sectional area of preselected diameter; and
said guide means having an opening of adjustable dimensions extendable throughout the entire length thereof, said guide means being semi-rigid such that, when compressive forces are applied to the said exterior surface of said guide means the guide wall is coiled so that the diameter of said guide wall is reduced, but when said compressive forces are removed, said guide wall tends to return to its said normal diameter, with said guide means being readily deformable to allow adjustment of said diameter of said guide means with said guide means being rolled into an adjusted diameter to facilitate utilization placement and movement of said guide means relative to said sheath of said trocar, and said opening of adjustable dimensions allowing said guide means to receive a catheter of a material suitable for causing said deformation of said guide means so that said catheter may be inserted through said opening exterior of a patient, and so that said guide means may be withdrawn from a patient without disturbing the positioning and integrity of said catheter.
1 Assignment
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Accused Products
Abstract
A slotted catheter emplacement guide of one piece construction which simplifies emplacement of a peritoneal catheter and also permits insertion through a very small abdominal opening.
201 Citations
4 Claims
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1. A catheter placement unit having a trocar with a substantially cylidrical sheath, the improvement comprising:
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guide means having an exterior surface and an interior surface which define a guide wall therebetween with said guide wall having a normally curved cross-sectional area of preselected diameter; and said guide means having an opening of adjustable dimensions extendable throughout the entire length thereof, said guide means being semi-rigid such that, when compressive forces are applied to the said exterior surface of said guide means the guide wall is coiled so that the diameter of said guide wall is reduced, but when said compressive forces are removed, said guide wall tends to return to its said normal diameter, with said guide means being readily deformable to allow adjustment of said diameter of said guide means with said guide means being rolled into an adjusted diameter to facilitate utilization placement and movement of said guide means relative to said sheath of said trocar, and said opening of adjustable dimensions allowing said guide means to receive a catheter of a material suitable for causing said deformation of said guide means so that said catheter may be inserted through said opening exterior of a patient, and so that said guide means may be withdrawn from a patient without disturbing the positioning and integrity of said catheter.
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2. A catheter placement unit having a trocar with a substantially cylindrical sheath, the improvement comprising:
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a guide having a generally tubular configuration about its longitudinal axis; said guide being made of a single curved piece of semirigid material having opposite longitudinally extending sides which are adjacent to one another and outer and inner surfaces which define a generally tubular wall therebetween having a preselected effective diameter; said opposite longitudinally extending sides providing a slot extendable along the entire longitudinal length of said guide whereby the exertion of compressive forces on the outer surfaces of the guide causes rolling of the generally tubular wall to reduce the effective diameter of the guide, said semi-rigid material being biased toward enlargement of the diameter of said guide when the effective diameter of said guide is reduced by said exertion of compressive forces which causes the generally tubular wall to be coiled, and whereby the exertion of expansion forces on the inner surface of the guide causes unrolling of the generally tubular wall to enlarge the effective diameter of the guide, so that the effective diameter of said guide is such that frictional engagement of said guide with said sheath of said trocar exists when said guide and sheath are coaxially positioned with respect to one another in the absence of application of compressive and expensive forces to said guide, and such that relative movement between said guide and sheath is permitted by overcoming said frictional engagement through exertion of one of said compressive and expansive forces on said guide to adjust the effective diameter of said guide, and so that said slot is adapted to receive said catheter with said catheter being movable relative to said slot and said slot being readily enlarged at those portions adjacent to said catheter to facilitate catheter movement relative to said slot. - View Dependent Claims (3)
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4. A catheter placement unit having a trocar with a substantially cylindrical sheath, the improvement comprising:
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a guide having a generally tubular configuration about its longitudinal axis; said guide being made of a single curved piece of semirigid material having opposite longitudinally extending sides which are adjacent to one another and outer and inner surfaces which define a generally tubular wall therebetween having a preselected effective diameter; said opposite longitudinally extending sides providing a slot extendable along the entire longitudinal length of said guide whereby the exertion of compressive forces on the outer surfaces of the guide causes rolling of the generally tubular wall to reduce the effective diameter of the guide and whereby the exertion of expansive forces on the inner surface of the guide causes unrolling of the generally tubular wall to enlarge the effective diameter of the guide, so that the effective diameter of said guide is such that frictional engagement of said guide with said sheath of said trocar exists when said guide and sheath are coaxially positioned with respect to one another in the absence of application of compressive and expansive forces to said guide, and such that relative movement between said guide and sheath is permitted by overcoming said frictional engagement through exertion of one of said compressive and expansive forces on said guide to adjust the effective diameter of said guide, and so that said slot is adapted to receive said catheter with said catheter being movable relative to said slot and said slot being readily enlarged at those portions adjacent to said catheter to facilitate catheter movement relative to said slot; and said catheter received in said guide and slot in said generally tubular wall including at least one cuff thereon.
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Specification