Device for introducing a liquid other than blood in a blood vessel
First Claim
1. A device for introducing a liquid other than blood into a blood vessel comprisinga hollow tubular needle, said needle being provided with a front open sharp end for insertion into a blood vessel and a rear open end, axially opposite the front sharp end;
- a hollow support base being provided with a forward open end connected to the rear end of said needle and a rearward open end defining a cavity therein adapted to receive a device for administering the liquid; and
a membrane disposed transversely in said support base across the rear open end of said needle, said membrane having means therein for providing a porosity selectively permeable to air and the liquid to be administered and impermeable to blood.
1 Assignment
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Accused Products
Abstract
The present invention relates to a device for introducing a liquid other than blood in a blood vessel, composed of a hollow needle having a front end and an axially opposite rear end, a hollow female support base which is fixed to the rear end of the needle or which is connected to the rear end thereof by a supple, transparent tube, and of a membrane which is disposed transversely with respect to said support base, which membrane is at the same time permeable to air, impermeable to blood and permeable to the liquid to be injected.
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Citations
13 Claims
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1. A device for introducing a liquid other than blood into a blood vessel comprising
a hollow tubular needle, said needle being provided with a front open sharp end for insertion into a blood vessel and a rear open end, axially opposite the front sharp end; -
a hollow support base being provided with a forward open end connected to the rear end of said needle and a rearward open end defining a cavity therein adapted to receive a device for administering the liquid; and a membrane disposed transversely in said support base across the rear open end of said needle, said membrane having means therein for providing a porosity selectively permeable to air and the liquid to be administered and impermeable to blood. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A perfusion device for enabling a liquid to be administered in a blood vessel comprising
a cannula including a hypodermic needle being provided with a rear open end and a sharp open front end for insertion into a blood vessel; -
a first hollow support base including a front conduit member connected to the rear open end of the cannula and first and second rear branching hollow conduit members, each branching conduit member being provided with a first end which communicates with the front conduit member and an open rear second end; a stopper removably engaged in the open second end of the first rear branching conduit member for hermetically closing the open second end; a membrane disposed transversely within the second rear branching conduit member, said membrane having means therein for providing a porosity selectively permeable to air and the liquid to be administered and impermeable to blood; and a second hollow support base provided with a front open third end which is engaged into the open second end of the second rear branching conduit member and an open rear fourth end which defines a cavity adapted to receive a device for administering the liquid.
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11. A catheter for administering a liquid other than blood into a vessel comprising
a hollow tubular cannula provided with a rear open end and a front open end for insertion in a vessel; a hollow support base fixed to the rear open end of the tubular cannula, said support base including first and second hollow branches, the first hollow branch being aligned axially with said tubular cannula, said first hollow branch being provided with an elastomeric diaphragm mounted transversely within the first hollow branch such that the diaphragm obstructs passage through said first hollow branch, said second hollow branch having mounted transversely therein, a membrane having means therein for providing a porosity selectively permeable to air and the liquid to be administered and impermeable to blood, said first and second hollow branches each being provided with an open first end which communicate with each and the rear open end of the hollow tubular cannula, said first and second hollow branch each further being provided with an open rear second end, the open rear second end of the first hollow branch being adapted to receive a hollow needle therethrough and through the diaphragm and into the tubular cannula and the open rear second end of the second hollow branch being adapted to receive a device for administering the liquid.
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12. A device for introducing a liquid other than blood into a blood vessel comprising
a hollow tubular needle provided with an open front sharp end and an axially opposite open rear end; -
a hollow support base having a first open end fixed to the open rear end of said needle and a rear second open end which defines a conically shaped cavity; a hollow adapter member provided with a front third open end, the outside of said front third open end being conically shaped and said front third open end being removably mounted within said conically shaped cavity of said rear open end, said hollow adapter member further provided with a rear fourth open end adapted to receive a device for administering the liquid; and a membrane transversely mounted within said rear fourth open end, said membrane having means therein for providing a porosity selectively permeable to air and the liquid to be introduced and impermeable to blood. - View Dependent Claims (13)
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Specification