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US 5,370,623 AGranted
Catheter with protective cover and method of catheterization
OwnerJeffry W. Kreamerinventor
Life of this patent
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Abstract
A catheterization system for embedment in a patient includes a sharp edged needle at the proximal end portion of the catheter. A protective sheath is received about the needle for relative slidable movement thereon between a first position wherein the sharp edge of the needle extends beyond the protective sheath and a second position wherein the blunt leading proximal edge of the protective sheath extends beyond and covers the sharp edge of the needle.
Claims5
A method of catheterization of a patient, comprising the steps of:
- (a) inserting into the patient a first tubular member having a proximal end portion with a sharp edge;
- (b) providing a second, coaxial tubular member which is received about said first tubular member and which includes a proximal end portion having a blunt edge;
- (c) advancing said second tubular member from a first position wherein said sharp edge extends beyond said second tubular member and a second position wherein said second tubular member covers said sharp edge;
- and
- (d) means for holding said second, coaxial tubular member in said second position.
2 more elements
A method of catheterization of a patient, comprising the steps of:
- (a) inserting into the patient a first tubular member having a proximal end portion with a sharp edge;
- (b) providing a second, coaxial tubular member which is received about said first tubular member and which includes a proximal end portion having a blunt edge;
- (c) advancing said second tubular member from a first position wherein said sharp edge extends beyond said second tubular member and to a second position wherein said second tubular member covers said sharp edge;
- (d) maneuvering said first tubular member inside the patient;
- (e) retracting said second tubular member to expose said sharp edge;
- (f) maneuvering said first tubular member inside the patient;
- and
- (g) advancing said second tubular member to cover said sharp edge.
5 more elements
Dependencies are inferred from the claim text.