Pre-slit injection site and tapered cannula

• US 6,261,266 B1
• Filed: 10/29/1998
• Issued: 07/17/2001
• Est. Priority Date: 01/25/1988
• Status: Expired due to Fees

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Desecki, Vincent C., Jepson, Steven C., Finley, Michael J., Dudar, Thomas E.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US09/181,975
• Time in Patent Office: 992 Days
• Field of Search: 604/189, 604/523, 604/533-539, 604/905, 604/164, 604/174, 604/256, 137/223
• US Class Current: 604/201
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: A61J 1/1406 Septums, pierceable membranes
• CPC Class Codes: A61J 1/1475 Inlet or outlet ports
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2055 having gripping means
• CPC Class Codes: A61J 1/2089 Containers or vials which are to be joined to each other in order to mix their contents combinations of vial and syringe for mixing their contents A61J1/2096
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 2039/1033 Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
• CPC Class Codes: A61M 2039/1066 having protection means, e.g. sliding sleeve to protect connector itself, shrouds to protect a needle present in the connector, protective housing, isolating sheath
• CPC Class Codes: A61M 2039/1072 with a septum present in the connector
• CPC Class Codes: A61M 2205/195 by the needle tip shape
• CPC Class Codes: A61M 2205/197 by the seal material
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: A61M 39/14 for connecting tubes having sealed ends needle sets A61M5/162; having valves closing automatically on disconnection of line A61M39/26
• CPC Class Codes: A61M 5/162 Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

A pre-slit injection site (34) includes a housing (40) with a flow path therethrough. A first end (42) of the housing (40) carries a pre-slit septum (52). One form of a blunt cannula (98), usable with the injection site (34), carries a locking member (100). When the pre-slit injection site (34) slidably receives the blunt cannula (98), the locking member (100) latches to the injection site (34) and creates a mechanically coupled unit. Another form of the cannula (280) includes a tube having a tapered distal end region (298) and having elongate discharge slots (294) for reducing contact surface area and for directing the flow laterally out of the cannula. The cannula may also include a rounded lead post (330), an annular barb (394), and axially oriented grooves (268).

Claims

1. An injection site usable with a blunt cannula device, said injection site comprising:

a housing having a fluid passageway therein and means defining a first opening within said housing and flexible means carried by said housing for sealing said first opening, said means having a resealable opening therein such that a blunt cannula can be sealingly inserted through said resealable opening and removed therefrom with said flexible means interacting with said housing so as to reseal said resealable opening; and

a first locking means on the housing of the injection site for cooperation with gripping fingers located on a housing of a blunt cannula device and second locking means on said housing of the injection site for cooperation with a threaded collar of the blunt cannula device.

2. An injection site as recited in claim 1 wherein said housing further includes exterior grasping means for grasping said injection site while inserting or withdrawing a cannula.

3. An injection site as recited in claim 1 wherein said first locking means includes a substantially radially extending shoulder defined on the exterior surface of said housing.

4. An injection site as recited in claim 3 wherein said second locking means includes means for receiving and threadedly engaging the collar of the blunt cannula device.

5. An injection site usable with a blunt cannula device comprising:

a housing having an inlet and an outlet and defining a fluid channel therebetween;

means for defining an access aperture in communication with said fluid channel;

means carried by said housing for sealing said access aperture, said means for sealing having a resealable opening therein such that a blunt cannula can be sealingly inserted through said opening and placed in fluid flow communication with said channel and such that the blunt cannula can be removed therefrom with said means interacting with said housing so as to reseal said resealable opening; and

two separate means located on the housing of the injection site that are so constructed and arranged to allow the housing of the injection site to be secured to the housing of the blunt cannula at two different locations when the blunt cannula is received in the resealable opening.

6. The injection site of claim 5 wherein the means for securing includes means for allowing threaded engagement with a collar of the housing of the blunt cannula.

7. An injection site usable with a blunt cannula device, said injection site comprising:

a housing having a fluid passageway therein and a first opening within said housing, a flexible member is carried by said housing for sealing said first opening, the flexible member includes a resealable opening therein such that a blunt cannula can be sealingly inserted through said resealable opening and removed therefrom with said flexible member interacting with said housing so as to reseal said resealable opening; and

a first locking member on the housing of the injection site that cooperates with gripping fingers on a housing of the blunt cannula and a second locking member on said housing of the injection site for securing a collar of the housing of the blunt cannula to the injection site.

8. An injection site usable with a blunt cannula device comprising:

a housing having an inlet and an outlet and defining a fluid channel therebetween;

an aperture in communication with said fluid channel; and

a flexible member carried by said housing for sealing said aperture, said flexible member having an opening therein such that a blunt cannula can be sealingly inserted through said opening and placed in fluid flow communication with said channel and the blunt cannula can be removed therefrom with said flexible member interacting with said housing so as to reseal said opening; and

the housing of the injection site including two securing members that cooperate with corresponding members located on a housing of the blunt cannula allowing the housing of the injection site to be secured to the housing of the blunt cannula at two different locations when the blunt cannula is inserted through the opening.