Infusion device
First Claim
1. A fluid administration device for introducing infusion liquid to a blood vessel of a patient comprising a catheter holder including a body having a passage extending therethrough, a catheter connected to said body in fluid communication with said passage and having a distal portion extending from the distal end of said body, movable seal means in the proximal end portion of said passage, a port connected with said passage at a point between said distal portion of said catheter and said seal means for introducing infusion liquid to said passage and catheter, and a needle extending in said passage and movable to an armed position in which said needle extends in said catheter and distally of the distal end of said catheter for inserting the distal ends of said needle and catheter into a patient, said needle being movable from said armed position and out of said catheter and body, said seal means normally being in a first position in said passage in which liquid can flow from said port and passage past said seal means to the atmosphere while said needle is in said passage to permit the purging of air from said body to a second position in which said passage is sealed from atmosphere at the proximal end portion thereof after said needle is removed from said body.
3 Assignments
0 Petitions
Accused Products
Abstract
A fluid administration device is provided which includes a catheter holder having a passage extending through it, a plastic cannula connected at the distal end of the passage, an elastomeric seal at the proximal end of the passage, and a fluid administration side port intermediate the ends of the passage. The device includes a needle holder having a needle cannula extending through the seal, passage, and into the catheter. When the needle holder is in its initial position, the seal is in a passage venting position so that a source of administration fluid can be connected to the side port and the device flushed of air. When the air is removed, the needle assembly is moved to an armed position forcing the seal into a compressed condition in the passage. After the catheter has been placed into the vein, the needle is withdrawn proximally from the catheter holder with the plug sealing the proximal end of the passage.
281 Citations
25 Claims
- 1. A fluid administration device for introducing infusion liquid to a blood vessel of a patient comprising a catheter holder including a body having a passage extending therethrough, a catheter connected to said body in fluid communication with said passage and having a distal portion extending from the distal end of said body, movable seal means in the proximal end portion of said passage, a port connected with said passage at a point between said distal portion of said catheter and said seal means for introducing infusion liquid to said passage and catheter, and a needle extending in said passage and movable to an armed position in which said needle extends in said catheter and distally of the distal end of said catheter for inserting the distal ends of said needle and catheter into a patient, said needle being movable from said armed position and out of said catheter and body, said seal means normally being in a first position in said passage in which liquid can flow from said port and passage past said seal means to the atmosphere while said needle is in said passage to permit the purging of air from said body to a second position in which said passage is sealed from atmosphere at the proximal end portion thereof after said needle is removed from said body.
- 2. A fluid administration device comprising a catheter holder including a body having a passage extending therethrough, a plastic catheter connected to the distal end portion of the body in fluid communication with said passage, movable seal means in the proximal end portion of said passage, said body having a port connected with said passage at a location between the distal end of said catheter and said seal means for introducing infusion liquid into said passage and catheter, said seal means being movable from a first position in which said passage is vented to atmosphere at the proximal end portion thereof to permit purging of air from said body to a second position in which said seal means sealably closes the proximal end portion of said passage, and a needle assembly carried by said body and movable between first and second positions relative to said body and removable from said body, said needle assembly including engagement means thereon engageable with said seal means, and a needle extending through said seal means and into said passage and catheter, said seal means being movable between said first and second positions thereof in response to movement of said needle assembly between said first and second positions thereof.
- 18. The method of connecting a source of intravenous liquid with a blood vessel of a patient comprising the steps of providing a catheter holder having a passage therethrough open to the atmosphere at the proximal end, an elastomeric seal in the proximal end portion of the passage and movable from a passage venting position to a passage closing position, a catheter connected to said holder and having a distal end portion extending therefrom, and a needle assembly having a needle extending through a portion of said seal and into said catheter, and an administration fluid inlet port connecting with said passage at a location between said catheter end portion and said seal, connecting a source of liquid to said port, with said seal in the venting position and with said needle extending therethrough causing liquid to fill said passage and flush substantially all air from said passage, moving said seal into the passage closing position to compress said seal portion and close said passage while said passage is filled with the liquid, then inserting the distal ends of said needle and catheter into a blood vessel of a patient while said passage is filled with the liquid, while maintaining said catheter in the vessel, withdrawing said needle assembly from said holder, and supplying liquid to said catheter and vessel through said inlet port to the blood vessel.
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20. A fluid administration device comprising a catheter holder including a body having a passage extending therethrough, a catheter connected to said body in fluid communication with said passage and having a distal portion extending from the distal end of said body, a movable seal in the proximal end portion of said passage, a port connected with said passage at a point between said seal and said distal portion of said catheter for introducing infusion liquid to said passage and catheter and a needle movable to a position in which said needle extends in said catheter and distally of the distal end of said catheter for inserting the distal ends of said needle and catheter into a patient, said needle being movable from said position and out of said catheter and body member, said seal being movable from a first position in which fluid can flow from said port and passage past said seal to the atmosphere to permit the purging of air from said body to a second position in which said passage is sealed from atmosphere at the proximal end portion thereof, said passage including an enlarged chamber at the proximal end portion thereof connecting with a smaller passage portion of said passage distally thereof, said seal being disposed in said chamber when in said first position thereof and including an elastomeric plug having at least a portion thereof forceable into said smaller passage portion in response to a force applied thereto for moving said seal from said first position to said second position, said seal including a piston member slidable in said chamber to move said plug to thereby move said seal from said first position to said second position thereof, said chamber having latching means on the walls thereof, said piston member having latching means thereon movable relative to said chamber into a latched position with said latching means on said chamber walls to latch said seal in said second position thereof.
- 21. The method of connecting a source of intravenous fluid with a blood vessel of a patient comprising the steps of providing a catheter holder having a passage therethrough open to the atmosphere at the proximal end, an elastomeric seal in the proximal end portion of the passage and movable from a passage venting position to a passage closing position, a catheter connected to the holder and having a distal end portion extending therefrom, and a needle assembly having a needle extending into said catheter, and an administration fluid inlet port connecting with said passage at a location between said catheter end portion and said seal, connecting a source of liquid to said port, with the seal in the venting position causing liquid to fill said passage and flush substantially all air from said passage, moving said seal into said passage closing position while said passage is filled with the liquid, then inserting the distal ends of said needle and catheter into a blood vessel of a patient while said passage is filled with the liquid, while maintaining said catheter in the vessel, withdrawing said needle assembly from said holder, and supplying a liquid to said catheter and vessel through said inlet port to the blood vessel, said needle assembly being movable distally to an armed position relative to said catheter holder so as to move the distal end of said needle distally of the distal end of said catheter, and effecting said step of moving said seal by moving said needle assembly to the armed position.
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24. A fluid administration device for introducing infusion liquid to a blood vessel of a patient comprising a catheter holder including a body having a passage extending therethrough, a catheter connected to said body in fluid communication with said passage and having a distal portion extending from the distal end of said body, a deformable elastomeric seal means in the proximal end portion of said passage, a port connected with said passage at a point between said distal portion of said catheter and said seal means for introducing infusion liquid to said passage and catheter, a needle movable to an armed position in which said needle extends in said passage and said catheter and distally of the distal end of said catheter for inserting the distal ends of said needle and catheter into a blood vessel of a patient, said needle normally passing through a hole in a portion of said seal means and being movable from said armed position and out of said catheter and body, said seal means normally being in a first position in said passage in which fluid can flow from said port and passage past said seal means to the atmosphere while said needle is passing through said hole to permit the purging of air from said body, means for deforming said seal means while said needle is passing through said hole into a second position in which said passage is sealed from atmosphere at the proximal end portion thereof and said seal means portion is compressed to ensure closure of said hole when said needle is removed therefrom, and means for securing said seal means in said second position.
Specification