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US 5,456,675 AGranted
Port cannula arrangement for connection to a port
AssigneeFresenius AG
InventorsPeter Wolbring, Dirk Anderheiden
Life of this patent
Estimating the term…
Abstract
Main cannula arrangement (10) with a metal cannula (12) and a connecting piece (14), featuring a valve (46), which is closed in the disconnected state and open in the connected state.
Claims24
Port cannula arrangement (10) for puncturing the septum of an internally located port with minimal material damage with a metal cannula (12) which is surface-ground at the distal end (20), and which proceeds into a connecting piece (14) at its proximal end (36), characterized as follows:
- a valve (46) which closes off access to the metal cannula (12) which is never exposed to blood under full vascular pressure in a germ proof manner is located within the connecting piece (14);
- the geometry of this valve is designed to allow the valve to be opened when the connecting piece is entered by a section of a complementary connecting piece for the purpose of establishing a connection to a syringe or similar device.
Apparatus (10) for connection to a container having an extension providing a duct for introducing fluid from said container into a body or, selectively, for passing fluid from said body through said duct into said container, said apparatus comprising:
- (a) a cannula (12) having a first end (24) and a second end (36),
- (b) an opening (30) in the first end (24) of said cannula (12) to be placed in communication with the interior of said body,
- (c) a connecting piece (14) having a first end (42) and a second end (38), the first end (42) of said connecting piece (14) being secured to the second end (36) of said cannula (12),
- (d) a hollow portion within said connecting piece (14), said hollow portion having a first chamber (50) and a second chamber (52),
- (e) said second chamber (52) communicating with the interior (18) of said cannula (12),
- (f) a resilient valve disc (46) mounted within said hollow portion of said connecting piece (14) between said first chamber (50) and said second chamber (52), said resilient valve disc (46) having a first face facing said first chamber (50) and a second face opposite said first face and facing said second chamber (52),
- (g) a slot (48) formed in said resilient valve disc (46) and extending from said first face to said second face thereof, said slot (48) being closed when said apparatus (10) is disconnected from said container thereby to seal said second chamber (52) from said first chamber (50),
- (h) a tubular element (60) slidably mounted within said first chamber (50) for movement toward and away from the first face of said resilient valve disc (46), said tubular element (60) having a first end (64) and a second end opposite said first end (64),
- (i) a central opening (54) extending through the second end (38) of said connecting piece (14) and providing access to the second end of said tubular element (60) and through said tubular element (60) to the first face of said resilient valve disc (46),
- (j) said cannula (12) and said second chamber (52) never being exposed to blood under full vascular pressure,
- (k) whereby, upon connecting said apparatus (10) to said container by inserting said extension of said container into said central opening (54), said extension will engage and depress the second end of said tubular element (60) and force the first end (64) thereof against the first face of said resilient valve disc (46) thereby to deform said resilient valve disc (46) and force open said slot (48), thus placing the first chamber (50) into communication with said second chamber (52) through said open slot (48) and permitting the passage of fluid between said first chamber (50) and said second chamber (52) through said open slot (48),
- (l) whereby, upon disconnection of said apparatus (10) from said container and removal of said extension from said central opening (54), said resilient valve disc (46) will revert to its undeformed state closing said slot (48) and preventing bacterial contamination from said first chamber (50) reaching said second chamber (52) and said body.
9 more elements
Port cannula apparatus (10) for connection to a container having an extension providing a duct for introducing fluid from said container into a body through a port implanted in said body and having a sealing septum, said port cannula apparatus comprising:
- (a) a cannula (12) having a first end (24) and a second end (36), said first end (24) being adapted to pierce said septum in said port thereby placing the interior (18) of said cannula (12) in communication with said port and the interior of said body,
- (b) a connecting piece (14) having a first end (42) and a second end (38), the first end (42) of said connecting piece (14) being secured to the second end (36) of said cannula (12),
- (c) a hollow portion within said connecting piece (14), said hollow portion having a first chamber (50) and a second chamber (52),
- (d) said second chamber (52) communicating with the interior (18) of said cannula (12),
- (e) a resilient valve disc (46) mounted within said hollow portion of said connecting piece (14) between said first chamber (50) and said second chamber (52), said resilient valve disc (46) having a first face facing said first chamber (50) and a second face opposite said first face and facing said second chamber (52),
- (f) a slot (48) formed in said resilient valve disc (46) and extending from said first face to said second face thereof, said slot (48) being closed when said port cannula apparatus (10) is disconnected from said container thereby to seal said second chamber (52) from said first chamber (50),
- (g) a tubular element (60) slidably mounted within said first chamber (50) for movement toward and away from the first face of said resilient valve disc (46), said tubular element (60) having a first end (64) and a second end opposite said first end (64),
- (h) a central opening (54) extending through the second end (38) of said connecting piece (14) and providing access to the second end of said tubular element (60) and through said tubular element to the first face of said resilient valve disc (46),
- (i) said cannula (12) and said second chamber (52) never being exposed to blood under full vascular pressure,
- (j) whereby, upon the first end (24) of said cannula (12) piercing the septum of said port, the interior (18) of said cannula (12) is placed in communication with the interior of said port and the interior of said body,
- (k) whereby, upon connecting said port cannula apparatus (10) to said container by inserting said extension of said container into said central opening (54), said extension will depress the second end of said tubular element (60) and force the first end (24) thereof against the first face of said resilient valve disc (46) thereby to deform said resilient valve disc (46) and force open said slot (48), placing the first chamber (50) into communication with said second chamber (52) through said open slot (48) and permitting the passage of fluid from said first chamber (50) to said second chamber (52) through said open slot (48),
- (l) whereby, upon disconnection of said port cannula apparatus (10) from said container and removal of said extension from said central opening (54), said resilient valve disc (46) will revert to its undeformed state closing said slot (48), preventing bacterial contamination from said first chamber (50) reaching said second chamber (52), said port and said body.
9 more elements
Port cannula arrangement (10) for punctuating the septum of an internally located port with minimal material damage with a metal cannula (12) which is surface-ground at the distal end (20) and which extends into a connecting piece (14) at its proximal end (36), for the purpose of establishing a fluid connection to a syringe or similar device having a complementary connecting piece adapted to be inserted into the connecting piece (14), characterized as follows:
- a valve (46) which closes off access to the metal cannula (12) which is never exposed to blood under full vascular pressure in a germ proof manner is located within the connecting piece (14), the geometry of this valve (46) is designed to allow the valve to be opened by the complementary connecting piece on the syringe or similar device when the connecting piece (14) is entered by a section of said complementary connecting piece thereby establishing a fluid connection to said syringe or similar device.
Port cannula arrangement (10) for puncturing the septum of an internally located port with minimal material damage with a metal cannula (12) which is surface-ground at the distal end (20), and which proceeds into a connecting piece (14) at its proximal end (36), characterized as follows:
- a valve (46) which closes off access to the metal cannula (12) which is never exposed to physiological fluids under full pressure of said physiological fluids in a body in a germ proof manner is located within the connecting piece (14);
- the geometry of this valve is designed to allow the valve to be opened when the connecting piece is entered by a section of a complementary connecting piece for the purpose of establishing a connection to a syringe or similar device.
Apparatus (10) for connection to a container having an extension providing a duct for introducing fluid from said container into a body or, selectively, for passing fluid from said body through said duct into said container, said apparatus comprising:
- (a) a cannula (12) having a first end (24) and a second end (36),
- (b) an opening (30) in the first end (24) of said cannula (12) to be placed in communication with the interior of said body,
- (c) a connecting piece (14) having a first end (42) and a second end (38), the first end (42) of said connecting piece (14) being secured to the second end (36) of said cannula (12),
- (d) a hollow portion within said connecting piece (14), said hollow portion having a first chamber (50) and a second chamber (52),
- (e) said second chamber (52) communicating with the interior (18) of said cannula (12),
- (f) a resilient valve disc (46) mounted within said hollow portion of said connecting piece (14) between said first chamber (50) and said second chamber (52), said resilient valve disc (46) having a first face facing said first chamber (50) and a second face opposite said first face and facing said second chamber (52),
- (g) a slot (48) formed in said resilient valve disc (46) and extending from said first face to said second face thereof, said slot (48) being closed when said apparatus (10) is disconnected from said container thereby to seal said second chamber (52) from said first chamber (50),
- (h) a tubular element (60) slidably mounted within said first chamber (50) for movement toward and away from the first face of said resilient valve disc (46), said tubular element (60) having a first end (64) and a second end opposite said first end (64),
- (i) a central opening (54) extending through the second end (38) of said connecting piece (14) and providing access to the second end of said tubular element (60) and through said tubular element (60) to the first face of said resilient valve disc (46),
- (j) said cannula (12) and said second chamber (52) never being exposed to physiological fluids under full pressure of said physiological fluids in said body,
- (k) whereby, upon connecting said apparatus (10) to said container by inserting said extension of said container into said central opening (54), said extension will engage and depress the second end of said tubular element (60) and force the first end (64) thereof against the first face of said resilient valve disc (46) thereby to deform said resilient valve disc (46) and force open said slot (48), thus placing the first chamber (50) into communication with said second chamber (52) through said open slot (48) and permitting the passage of fluid between said first chamber (50) and said second chamber (52) through said open slot (48),
- (l) whereby, upon disconnection of said apparatus (10) from said container and removal of said extension from said central opening (54), said resilient valve disc (46) will revert to its undeformed state closing said slot (48) and preventing bacterial contamination from said first chamber (50) reaching said second chamber (52) and said body.
9 more elements
Port cannula apparatus (10) for connection to a container having an extension providing a duct for introducing fluid from said container into a body through a port implanted in said body and having a sealing septum, said port cannula apparatus comprising:
- (a) a cannula (12) having a first end (24) and a second end (36), said first end (24) being adapted to pierce said septum in said port thereby placing the interior (18) of said cannula (12) in communication with said port and the interior of said body,
- (b) a connecting piece (14) having a first end (42) and a second end (38), the first end (42) of said connecting piece (14) being secured to the second end (36) of said cannula (12),
- (c) a hollow portion within said connecting piece (14), said hollow portion having a first chamber (50) and a second chamber (52),
- (d) said second chamber (52) communicating with the interior (18) of said cannula (12),
- (e) a resilient valve disc (46) mounted within said hollow portion of said connecting piece (14) between said first chamber (50) and said second chamber (52), said resilient valve disc (46) having a first face facing said first chamber (50) and a second face opposite said first face and facing said second chamber (52),
- (f) a slot (48) formed in said resilient valve disc (46) and extending from said first face to said second face thereof, said slot (48) being closed when said port cannula apparatus (10) is disconnected from said container thereby to seal said second chamber (52) from said first chamber (50),
- (g) a tubular element (60) slidably mounted within said first chamber (50) for movement toward and away from the first face of said resilient valve disc (46), said tubular element (60) having a first end (64) and a second end opposite said first end (64),
- (h) a central opening (54) extending through the second end (38) of said connecting piece (14) and providing access to the second end of said tubular element (60) and through said tubular element to the first face of said resilient valve disc (46),
- (i) said cannula (12) and said second chamber (52) never being exposed to physiological fluids under full pressure of said physiological fluids in said body,
- (j) whereby, upon the first end (24) of said cannula (12) piercing the septum of said port, the interior (18) of said cannula (12) is placed in communication with the interior of said port and the interior of said body,
- (k) whereby, upon connecting said port cannula apparatus (10) to said container by inserting said extension of said container into said central opening (54), said extension will depress the second end of said tubular element (60) and force the first end (24) thereof against the first face of said resilient valve disc (46) thereby to deform said resilient valve disc (46) and force open said slot (48), placing the first chamber (50) into communication with said second chamber (52) through said open slot (48) and permitting the passage of fluid from said first chamber (50) to said second chamber (52) through said open slot (48),
- (l) whereby, upon disconnection of said port cannula apparatus (10) from said container and removal of said extension from said central opening (54), said resilient valve disc (46) will revert to its undeformed state closing said slot (48), preventing bacterial contamination from said first chamber (50) reaching said second chamber (52), said port and said body.
9 more elements
Port cannula arrangement (10) for punctuating the septum of an internally located port with minimal material damage with a metal cannula (12) which is surface-ground at the distal end (20) and which extends into a connecting piece (14) at its proximal end (36), for the purpose of establishing a fluid connection to a syringe or similar device having a complementary connecting piece adapted to be inserted into the connecting piece (14), characterized as follows:
- a valve (46) which closes off access to the metal cannula (12) which is never exposed to physiological fluids under full pressure of said physiological fluids in said body in a germ proof manner is located within the connecting piece (14), the geometry of this valve (46) is designed to allow the valve to be opened by the complementary connecting piece on the syringe or similar device when the connecting piece (14) is entered by a section of said complementary connecting piece thereby establishing a fluid connection to said syringe or similar device.
Dependencies are inferred from the claim text.