Intravenous cannula assembly
First Claim
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1. An intravenous cannula assembly, comprising:
- a cannula having a distal end insertable through an opening in a subject'"'"'s skin for draining fluid or for introducing a medication via its distal end;
a guide needle in an operative position with respect to said cannula and having a distal end for piercing the subject'"'"'s skin and for guiding the distal end of the cannula through the subject'"'"'s skin, said guide needle being movable to a retracted position via the proximal end of the cannula;
and a protective enclosure for enclosing the guide needle when moved to its retracted position;
said protective enclosure comprising a plurality of sections in telescoping relation to each other including an inner section closed at its proximal end by a proximal end wall and open at its distal end, an intermediate section open at both ends, and an outer section open at both ends;
the proximal end of said cannula having a hub secured to the distal end of the outer enclosure section by a quickly-attachable connector;
said proximal end of the guide needle being secured to said proximal end wall of the inner enclosure section such that when the enclosure sections are in a compact nested condition, the guide needle is in its operative position extending through the inner, intermediate and outer enclosure sections and through the cannula, and when the enclosure sections are in an extended protective condition, the guide needle is completely enclosed by the inner, intermediate and outer enclosure sections.
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Abstract
An intravenous cannula assembly having a cannula with a distal end insertable into a patient, a guide needle movable to an operative position with respect to the cannula and having as distal end for piercing the patient. The guide needle is movable to a retracted position via the proximal end of the cannula for removal therefrom and having a protective enclosure for enclosing the guide needle.
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Citations
11 Claims
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1. An intravenous cannula assembly, comprising:
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a cannula having a distal end insertable through an opening in a subject'"'"'s skin for draining fluid or for introducing a medication via its distal end; a guide needle in an operative position with respect to said cannula and having a distal end for piercing the subject'"'"'s skin and for guiding the distal end of the cannula through the subject'"'"'s skin, said guide needle being movable to a retracted position via the proximal end of the cannula; and a protective enclosure for enclosing the guide needle when moved to its retracted position; said protective enclosure comprising a plurality of sections in telescoping relation to each other including an inner section closed at its proximal end by a proximal end wall and open at its distal end, an intermediate section open at both ends, and an outer section open at both ends; the proximal end of said cannula having a hub secured to the distal end of the outer enclosure section by a quickly-attachable connector; said proximal end of the guide needle being secured to said proximal end wall of the inner enclosure section such that when the enclosure sections are in a compact nested condition, the guide needle is in its operative position extending through the inner, intermediate and outer enclosure sections and through the cannula, and when the enclosure sections are in an extended protective condition, the guide needle is completely enclosed by the inner, intermediate and outer enclosure sections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification