Protective sheath for catheter assembly
First Claim
1. In a catheter assembly having a cannula having cannula distal and proximal end portions and a longitudinal duct therethrough from the cannula distal end portion to the cannula proximal end portion, an inserter having inserter distal and proximal end portions and a guide channel therethrough from the inserter distal end portion to the inserter proximal end portion, the cannula slidably fitting in the guide channel, and a hub structure having hub distal and proximal end portions and a passageway therethrough from the hub distal end portion to the hub proximal end portion, the cannula proximal end portion being attached to the hub structure with the duct in flow communication with the passageway, an improvement comprising:
- a sheath having sheath distal and proximal end portions and a longitudinal slit or weakened portion extending therealong from said sheath distal end portion to said sheath proximal end portion, said sheath being about said cannula between said inserter and said hub structure;
sheath stripping means carried by said inserter for stripping said sheath, starting from said sheath distal end portion, from about said cannula as said cannula is slid distally through said guide channel;
a first lock member carried by said inserter; and
a second lock member about said cannula between said inserter and said hub structure, said first and second lock members being interlockable with on another.
3 Assignments
0 Petitions
Reexamination
Accused Products
Abstract
An improvement in a catheter assembly including a cannula, an inserter having a guide channel therethrough in which the cannula slidably fits and a hub structure with the cannula proximal end portion attached to the hub structure. The improvement includes a sheath having a longitudinal slit or weakened portion and being about the cannula between the inserter and the hub structure. A sheath stripping construction carried by the inserter strips the sheath from about the cannula as the cannula slides distally through the guide channel. A first lock member is carried by the inserter and an interlocking second lock member is located about the cannula between the inserter and the hub structure. The cannula is protected from contamination and from kinking and a positive lock serves to prevent its accidental withdrawal. A method of inserting a cannula using such an assembly is likewise set forth.
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Citations
18 Claims
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1. In a catheter assembly having a cannula having cannula distal and proximal end portions and a longitudinal duct therethrough from the cannula distal end portion to the cannula proximal end portion, an inserter having inserter distal and proximal end portions and a guide channel therethrough from the inserter distal end portion to the inserter proximal end portion, the cannula slidably fitting in the guide channel, and a hub structure having hub distal and proximal end portions and a passageway therethrough from the hub distal end portion to the hub proximal end portion, the cannula proximal end portion being attached to the hub structure with the duct in flow communication with the passageway, an improvement comprising:
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a sheath having sheath distal and proximal end portions and a longitudinal slit or weakened portion extending therealong from said sheath distal end portion to said sheath proximal end portion, said sheath being about said cannula between said inserter and said hub structure; sheath stripping means carried by said inserter for stripping said sheath, starting from said sheath distal end portion, from about said cannula as said cannula is slid distally through said guide channel; a first lock member carried by said inserter; and a second lock member about said cannula between said inserter and said hub structure, said first and second lock members being interlockable with on another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification