초록 ▼

A medical device includes a vascular access device with an access port having a septum and a slit. The slit is formed on the inner surface of the body of the septum where the access port receives an access device that is separate from the vascular access device through the slit of the septum. A pivo

A medical device includes a vascular access device with an access port having a septum and a slit. The slit is formed on the inner surface of the body of the septum where the access port receives an access device that is separate from the vascular access device through the slit of the septum. A pivoting member in communication with the access port pivots when the port is accessed by an access device. The medical device may be used to control the volume displacement of a chamber within the medical device by decreasing the volume of the chamber by inserting a substance having a mass into the chamber, pivoting a structure associated with the chamber, and increasing the volume of the chamber simultaneously and commensurately with the mass of the substance inserted into the chamber.

대표청구항 ▼

The invention claimed is: 1. A medical device, comprising: a vascular access device including a body having an access port, wherein an inner surface of the body forms a fulcrum, and wherein the access port forms a fluid flow path through the vascular access device; a septum positioned within the ac

The invention claimed is: 1. A medical device, comprising: a vascular access device including a body having an access port, wherein an inner surface of the body forms a fulcrum, and wherein the access port forms a fluid flow path through the vascular access device; a septum positioned within the access port, the septum having a slit through which a separate extravascular device may be inserted into the access port of the vascular access device; and a rigid, T-shaped pivoting member embedded within a wall of the septum and outside the fluid flow path, wherein the pivoting member pivots against the fulcrum when the port is accessed by the separate extravascular device such that upon removal of the separate extravascular device fluid is not drawn into the medical device. 2. The medical device of claim 1, wherein the body of the vascular access device further includes an interior chamber and an outer chamber, wherein the interior chamber is inside the fluid flow path, and wherein the outer chamber is outside the fluid flow path. 3. The medical device of claim 2, wherein the rigid, T-shaped pivoting member pivots as the separate extravascular device is inserted into the access port causing the portion of the septum within which the rigid pivoting member is embedded to move into the outer chamber to thereby increase the volume of the interior chamber. 4. The medical device of claim 3, wherein the body of the vascular access device further includes one or more channels adapted to allow air to escape the outer chamber as the septum moves into the outer chamber. 5. The medical device of claim 2, wherein the rigid pivoting member is embedded within a silastic material that extends from the septum. 6. The medical device of claim 5, wherein the septum and the silastic material that extends from the septum are integrally formed. 7. The medical device of claim 5, wherein the septum and the silastic material extending from the septum are formed separately and bonded together. 8. The medical device of claim 5, wherein the silastic material extending from the septum is formed to include at least one fold along its cross section when the silastic material is in a first resting position. 9. The medical device of claim 8, wherein the at least one fold straightens as the separate extravascular device is inserted into the access port to thereby increase the volume in the interior chamber, the silastic material assuming a second opened position. 10. The medical device of claim 9, wherein the at least one fold returns as the separate extravascular device is removed from the access port to thereby decrease the volume in the interior chamber, the silastic material resuming the first resting position. 11. The medical device of claim 10, wherein the decrease in volume within the interior chamber results in zero net volume displacement within the interior chamber as the separate extravascular access device is removed from the access port. 12. The medical device of claim 10, wherein the decrease in volume within the interior chamber results in a volume that is displaced distally from the interior chamber as the separate extravascular access device is removed from the access port. 13. The medical device of claim 10, wherein the slit in the septum is closed under the force of the fold formed in the silastic material extending from the septum as the separate extravascular access device is removed from the access port. 14. The medical device of claim 1, wherein the rigid pivoting member is rigid relative to the materials comprising the septum within which it is embedded. 15. A medical device, comprising: a vascular access device including a body having an access port, wherein an inner surface of the body forms a fulcrum, and wherein the access port forms a fluid flow path through the vascular access device; a septum positioned within the access port, the septum having a slit through which a separate extravascular device may be inserted into the access port of the vascular access device; and a rigid pivoting member embedded within a wall of the septum and outside the fluid flow path, wherein the pivoting member pivots against the fulcrum when the port is accessed by the separate extravascular device such that upon removal of the separate extravascular device fluid is not drawn into the medical device. 16. The medical device of claim 15, wherein the body of the vascular access device further includes an interior chamber and an outer chamber, wherein the interior chamber is inside the fluid flow path, and wherein the outer chamber is outside the fluid flow path. 17. The medical device of claim 15, wherein the body of the vascular access device further includes one or more channels adapted to allow air to escape the outer chamber as the septum moves into the outer chamber. 18. The medical device of claim 15, wherein the rigid pivoting member is embedded within a silastic material that extends from the septum. 19. The medical device of claim 15, wherein the silastic material extending from the septum is formed to include at least one fold along its cross section when the silastic material is in a first resting position. 20. The medical device of claim 15, wherein the rigid pivoting member is rigid relative to the materials comprising the septum within which it is embedded.