Catheter placement assembly
DC CAFCFirst Claim
1. A catheter assembly comprisinga flexible catheter defining a passageway,a catheter hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen which communicates on a distal end thereof with said passageway,a flexible resilient diaphragm which can be penetrated by a hypodermic needle, such as a catheter introducer needle, said diaphragm being attached to said hub to seal a proximal end of said hub lumen in a liquid tight manner for preventing a liquid which has been introduced into said hub lumen from said catheter, external to a needle which may be penetrating said diaphragm and projecting into said hub lumen, from flowing through said diaphragm beyond said hub,a needle attachment body connected to said hub, anda cannulated catheter introducer needle having a sharp tip on a free end thereof and having an opposite end attached to said body such that said introducer needle has at least one position relative to said body which is operative to project through said diaphragm, hub lumen and catheter passageway when said body is attached to said hub for introducing said catheter into a liquid containing region of a biological organism, said introducer needle defining at least one fenestration on a central portion thereof which communicates with a cannula of said introducer needle and with said hub lumen and which is disposed within said hub lumen distally of said diaphragm when said introducer needle is disposed in said operative position.
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Litigations
1 Petition
Accused Products
Abstract
A catheter assembly is disclosed which includes a flexible catheter, a hub attached to the catheter which defines a lumen and an adjoining flash back chamber which communicate with the catheter, and a flexible resilient diaphragm attached to the hub through which a hypodermic needle such as a catheter introducer needle can be passed. The diaphragm prevents a liquid, such as blood, which has been introduced into the hub lumen from flowing past the diaphragm and beyond the hub when the diaphragm is unpenetrated. A hollow tubular body may also be included to which a cannulated catheter needle can be either stationarily or movably attached. The body is removably attached to the hub behind the diaphragm. If movably attached to the body, the needle has a retracted position fully recessed within the body for safe storage and an advanced operative position extending through the diaphragm, hub and catheter. A needle occluding member may also be provided to prevent a liquid such as blood from flowing through the needle into the body. The member may be a movable guide wire or a stationary obturator member. A liquid outlet port can be provided on the side of the hub and a multi-position stop cock can be mounted on the hub to direct liquid flow from the catheter to the side port while blocking flow toward the diaphragm and vise versa.
289 Citations
39 Claims
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1. A catheter assembly comprising
a flexible catheter defining a passageway, a catheter hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen which communicates on a distal end thereof with said passageway, a flexible resilient diaphragm which can be penetrated by a hypodermic needle, such as a catheter introducer needle, said diaphragm being attached to said hub to seal a proximal end of said hub lumen in a liquid tight manner for preventing a liquid which has been introduced into said hub lumen from said catheter, external to a needle which may be penetrating said diaphragm and projecting into said hub lumen, from flowing through said diaphragm beyond said hub, a needle attachment body connected to said hub, and a cannulated catheter introducer needle having a sharp tip on a free end thereof and having an opposite end attached to said body such that said introducer needle has at least one position relative to said body which is operative to project through said diaphragm, hub lumen and catheter passageway when said body is attached to said hub for introducing said catheter into a liquid containing region of a biological organism, said introducer needle defining at least one fenestration on a central portion thereof which communicates with a cannula of said introducer needle and with said hub lumen and which is disposed within said hub lumen distally of said diaphragm when said introducer needle is disposed in said operative position.
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22. A catheter assembly comprising
a flexible catheter defining a passageway extending between open proximal and distal ends, a catheter hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen which communicates with said passageway, a side access port communicating with said hub lumen, a needle attachment body connected to said hub, and a cannulated catheter introducer needle having a sharp tip on a free end thereof and having an opposite end attached to said body such that said introducer needle has at least one position relative to said body which is operative to project through said hub lumen and catheter passageway when said body is attached to said hub for introducing said catheter into a liquid containing region of a biological organism, said introducer needle defining at least one fenestration on a central portion thereof which communicates with a cannula of said introducer needle and, when said introducer needle is in said operative position, with said hub lumen and, a flexible resilient diaphragm attached between said body and a proximal end of said hub proximal to said side access port for preventing the flow of a liquid through said hub lumen past said side access port and through the proximal end of said hub external to said introducer needle cannula.
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31. A catheter assembly comprising
a flexible catheter defining a passageway which extends between open proximal and distal ends, a catheter hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen which extends between open proximal and distal ends and which communicates on a distal end thereof with said passageway, a flexible, resilient diaphragm which can be penetrated by a hypodermic needle, such as a catheter introducer needle, said diaphragm being attached to said hub to seal a proximal end of said hub lumen in a liquid tight manner for preventing a liquid which has been introduced into said hub lumen from said catheter, external to a needle which may be penetrating said diaphragm and projecting into said hub lumen, from flowing through said diaphragm beyond said hub, a needle attachment body removably connected to said hub, and a cannulated catheter introducer needle having a sharp tip on a free end thereof and having an opposite end attached to said body such that said introducer needle has at least one position relative to said body which is operative to project through said diaphragm, hub lumen and catheter passageway when said body is attached to said hub for introducing said catheter into a liquid containing region of a biological organism, said introducer needle defining at least one fenestration on a central portion thereof which communicates with a cannula of said introducer needle and with said hub lumen and which is positioned distally of said diaphragm when said introducer needle is disposed in said operative position.
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32. A catheter assembly comprising
a flexible catheter defining a passageway extending between open proximal and distal ends, a catheter hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen therethrough which communicates with said passageway, a hollow needle attachment body connected to said hub, a cannulated catheter introducer needle having a sharp tip on a free end thereof and being movably attached to said body and reciprocally movable longitudinally between a retracted storage position recessed within said body and an operative position projecting out of said body through said hub lumen and catheter passageway for introducing said catheter into a liquid containing region of a biological organism, said needle defining at least one fenestration on a central portion thereof which communicates with a cannula of said needle and, when said needle is disposed in said operative position, with said hub lumen.
- 34. The assembly 32 further comprising a flexible resilient diaphragm which can be penetrated by a needle, such as a catheter introducer needle, said diaphragm being attached to said hub for preventing a liquid which has been introduced into said hub lumen from flowing external to said introducer needle through said diaphragm and beyond said hub, said fenestration being located distally of said diaphragm when said introducer needle is disposed in said operative position.
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38. A catheter assembly comprising
a flexible catheter defining a passageway therethrough, a hub having a distal end attached to a proximal end of said catheter, said hub defining a lumen therethrough which communicates with said passageway, a hollow needle attachment body connected to said hub, and a cannulated catheter introducer needle having a sharp tip on a free end thereof and being movably attached to said body and reciprocally movable longitudinally between a retracted storage position recessed within said body and an operative position projecting out of said body through said hub lumen and catheter passageway for introducing said catheter into a liquid containing region of a biological organism, and an elongated movable guide member for providing a guide for advancing said catheter into a biological organism, said guide member being attached to said attachment body and aligned for movement through a cannula of said needle.
Specification