Safety shield system for a syringe
First Claim
1. A medical device for delivering a medicament to a patient, comprising:
- a syringe assembly comprising;
a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained;
a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and
a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to expel the medicament from said reservoir;
a shield releasably mounted on a front portion of said barrel at a first position; and
an urging member for urging said shield in a forward direction relative to said syringe assembly, wherein one of said shield and said barrel defines two track arrangements on opposing sides of said one of said shield and said barrel, each of said track arrangements having an entry track having an end joined to a lockout track at an intersection, a first portion of said lockout track extending beyond said intersection to a first end of said lockout track and a second portion of said lockout track extending beyond said intersection to a second end of said lockout track, and the other of said shield and said barrel includes pins arranged on resilient lever arms and guidable in respective ones of said track arrangements,said shield being movable by interaction with an area proximate a needle cannula insertion point on a patient'"'"'s skin from said first position to a second position against the urgency of said urging member when said needle cannula is inserted into a patient for delivery of the medicament, wherein, in each of said track arrangements, said pin moving from a first pin position along said entry track at least to the intersection and into a second pin position in said lock-out track during movement of said shield from the first position to the second position, andsaid shield being moveable from said second position to a third position by the urgency of said urging member upon removal of said needle cannula from said patient, wherein, in each of said track arrangements, said pin moving along said lockout track from said second pin position to a third pin position solely by the urgency of said urging member during movement of said shield from said second position to said third position, the forward ends of said lockout tracks being axially offset so that said shield is held askew relative to said needle cannula by the urgency of said urging member when said shield is in the third position, andwherein said forward tip of said needle cannula is covered by said shield when said shield is in said third position, wherein said one of said shield and said barrel further comprises a blocking element arranged at said end of said entry track proximate said intersection in at least one of said track arrangement, said blocking element having a fixed blocking surface facing said lock-out track of said at least one of said track arrangements and blocking reentry of the associated one of said pins into said entry track from said lock-out track.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical device includes a syringe assembly and a shield system for delivering medicament to a patient. The syringe assembly includes a barrel defining a medicament reservoir, a needle cannula coupled to the barrel and in fluid communication with the reservoir, a plunger having a stopper positioned in the reservoir and a thumb pad for moving the plunger in the reservoir. The shield system has a shield coupled to a forward end of the barrel, the shield being movable from a first position disposed from the needle cannula tip to a second position during insertion of the needle into a patient and movable from the second position to a third position covering the needle cannula tip after the needle cannula is removed from the patient. An urging member urges the shield to the third position upon removal of the needle cannula from the patient.
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Citations
35 Claims
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1. A medical device for delivering a medicament to a patient, comprising:
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a syringe assembly comprising; a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained; a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to expel the medicament from said reservoir; a shield releasably mounted on a front portion of said barrel at a first position; and an urging member for urging said shield in a forward direction relative to said syringe assembly, wherein one of said shield and said barrel defines two track arrangements on opposing sides of said one of said shield and said barrel, each of said track arrangements having an entry track having an end joined to a lockout track at an intersection, a first portion of said lockout track extending beyond said intersection to a first end of said lockout track and a second portion of said lockout track extending beyond said intersection to a second end of said lockout track, and the other of said shield and said barrel includes pins arranged on resilient lever arms and guidable in respective ones of said track arrangements, said shield being movable by interaction with an area proximate a needle cannula insertion point on a patient'"'"'s skin from said first position to a second position against the urgency of said urging member when said needle cannula is inserted into a patient for delivery of the medicament, wherein, in each of said track arrangements, said pin moving from a first pin position along said entry track at least to the intersection and into a second pin position in said lock-out track during movement of said shield from the first position to the second position, and said shield being moveable from said second position to a third position by the urgency of said urging member upon removal of said needle cannula from said patient, wherein, in each of said track arrangements, said pin moving along said lockout track from said second pin position to a third pin position solely by the urgency of said urging member during movement of said shield from said second position to said third position, the forward ends of said lockout tracks being axially offset so that said shield is held askew relative to said needle cannula by the urgency of said urging member when said shield is in the third position, and wherein said forward tip of said needle cannula is covered by said shield when said shield is in said third position, wherein said one of said shield and said barrel further comprises a blocking element arranged at said end of said entry track proximate said intersection in at least one of said track arrangement, said blocking element having a fixed blocking surface facing said lock-out track of said at least one of said track arrangements and blocking reentry of the associated one of said pins into said entry track from said lock-out track. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A combination comprising a medical syringe and a safety shield assembly, said medical syringe comprising a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained, a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir, and a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir;
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said safety shield assembly comprising a shield releasably mounted on a front portion of said barrel at a first position, and an urging member for urging said shield in a forward direction relative to said barrel, wherein one of said shield and said barrel defines two track arrangements on opposing sides of said one said shield and barrel, each of track arrangements having an entry track with an end joined to a lockout track at an intersection, a first portion of said lockout track extending beyond said intersection to a first end of said lockout track and a second portion of said lockout track extending beyond said intersection to a second end of said lockout track, and the other of said shield and said barrel includes a radial projections arranged on resilient lever arms and guidably inserted in respective ones of said track arrangements, said shield being movable by interaction with an area on a patient'"'"'s skin proximate a needle cannula insertion point from said first position to a second position against the urgency of said urging member when said needle cannula is inserted into a patient for delivery of the medicament, wherein, in each of said track arrangements, said radial projection moving from a first projection position along said entry track at least to the intersection and into a second projection position in said lock-out track during movement of said shield from the first position to the second position, and said shield being moveable from said second position to a third position by the urgency of said urging member upon removal of said needle cannula from said patient, wherein said forward tip of said needle cannula is covered by said shield when said shield is in said third position, wherein, in each of said track arrangements, said radial projection moving in said lock-out track from said second projection position to a third projection position solely by the urgency of said urging member during movement of said shield from the second position to the third position, the forward ends of said lockout tracks being axially offset so that said shield is held askew relative to said needle cannula by the urgency of said urging member when said shield is in the third position, and wherein said one of said shield and said barrel further comprises a blocking element arranged at said end of said entry track proximate said intersection in at least one of said track arrangements, said blocking element having a fixed blocking surface facing said lock-out track of said at least one of said track arrangements, and blocking reentry of the associated one of said pins into said entry track from said lock-out track. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A shield assembly for connection to a syringe barrel for preventing inadvertent needle sticks after use of the syringe, the shield system comprising a cylindrical portion connectable to a front end of the syringe barrel, a shield releasably mounted on said cylindrical portion at a first position, and an urging member for urging said shield in a forward direction relative to the syringe barrel, wherein one of said shield and said cylindrical portion defines two track arrangements on opposing sides of said one of said shield and said barrel, each of said track arrangements, having an entry track with an end joined to a lockout track at an intersection, a first portion of said lockout track extending beyond said intersection to a first end of said lockout track and a second portion of said lockout track extending beyond said intersection to a second end of said lockout track, and the other of said shield and said cylindrical portion includes pins arranged on resilient lever arms and guidably inserted in said track arrangements,
said shield being movable by interaction with an area proximate a needle cannula insertion point on a patient'"'"'s skin from said first position to a second position against the urgency of said urging member when a needle cannula of the syringe is inserted into a patient for delivery of the medicament, wherein, in each of said track arrangements, said pin moving from a first pin position along said entry track at least to the intersection and into a second pin position in said lock-out track during movement of said shield from the first position to the second position, and said shield being moveable from said second position to a third position by the urgency of said urging member upon removal of the needle cannula from the patient to cover the tip of the needle cannula connected to the forward end of the syringe barrel, wherein, in each of said track arrangements, said pin moving along said lockout track from said second pin position to a third pin position solely by the urgency of said urging member during movement of said shield from said second position to said third position, the forward ends of said lockout tracks being axially offset so that said shield is held askew relative to said needle cannula by the urgency of said urging member when said shield is in the third position, and wherein said one of said shield and said barrel further comprises a blocking element arranged at said end of said entry track proximate said intersection in at least one of said track arrangements, said blocking element having a fixed blocking surface facing said lock-out track of said at least one of said track arrangements and blocking reentry of the associated one of said pins into said entry track from said lock-out track.
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34. A medical device for delivering a medicament to a patient, comprising:
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a syringe assembly comprising; a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained; a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir; a shield releasably mounted on a front portion of said barrel at a first position, wherein one of said shield and said barrel defines two track arrangements on opposing sides of said one of said shield and said barrel, each of said track arrangements having an entry track having an end joined to a lockout track at an intersection, a first portion of said lockout track extending beyond said intersection to a first end of said lockout track and a second portion of said lockout track extending beyond said intersection to a second end of said lockout track, and the other of said shield and said barrel includes radial projections arranged on resilient lever arms and guidably inserted in respective ones of said track arrangements; means for urging said shield in a forward direction relative to said syringe assembly; means for retaining said shield in said first position; means for allowing movement of said shield from said first position to a second position by interaction with a patient'"'"'s skin and against the urgency of said urging member when said needle cannula is inserted into a patient for delivery of the medicament, wherein, in each of said track arrangements, said radial projection moving from a first projection position along said entry track at least to the intersection and into a second projection position in said lock-out track during movement of said shield from the first position to the second position; and means for allowing movement of said shield from said second position to a third position by the urgency of said means for urging upon removal of said needle cannula from said patient, wherein said forward tip of said needle cannula is covered by said shield when said shield is in said third position, wherein, in each of said track arrangements, said radial projection moving in said lock-out track from said second projection position to a third projection position solely by the urgency of said urging member during movement of said shield from the second position to the third position, the forward ends of said lockout tracks being axially offset so that said shield is held askew relative to said needle cannula by the urgency of said urging member when said shield is in the third position, and wherein said one of said shield and said barrel further comprises a blocking element arranged at said end of said entry track proximate said intersection of at least one of said track arrangements, said blocking element having a fixed blocking surface facing said lock-out track of said at least one of said track arrangements and blocking reentry of the associated one of said pins into said entry track from said lock-out track. - View Dependent Claims (35)
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Specification