US20150080848A1 - Puncturable membrane for safety syringe - Google Patents
Puncturable membrane for safety syringe Download PDFInfo
- Publication number
- US20150080848A1 US20150080848A1 US14/550,788 US201414550788A US2015080848A1 US 20150080848 A1 US20150080848 A1 US 20150080848A1 US 201414550788 A US201414550788 A US 201414550788A US 2015080848 A1 US2015080848 A1 US 2015080848A1
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- United States
- Prior art keywords
- syringe
- syringe body
- barrier
- fluid chamber
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
- A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
- A61M5/288—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened by piercing without internal pressure increase
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M5/3134—Syringe barrels characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
Definitions
- the present invention relates to a safety syringe wherein a variable fluid chamber is hermetically sealed off from contaminated ambient air until a needle assembly is attached to a syringe body such that fluidic medication may be withdrawn from a medication vial and injected into a patient in a sterile manner.
- FIG. 1 illustrates a conventional safety syringe with a detached needle assembly.
- a medical professional may select the appropriate sized needle based on the fluidic medication to be administered to the patient.
- the needle assembly may be attached to the syringe body of the safety syringe.
- a distal end of the syringe body is uncovered.
- ambient air is allowed to flow into a variable fluid chamber which houses the fluidic medication right before the fluidic medication is injected into the patient.
- the ambient air flowed into the variable fluid chamber may contain viruses, bacteria or other unwanted contaminants which may he lodged onto the inner surface of the variable fluid chamber.
- the contaminant lodged onto the inner surface of the variable fluid chamber may contaminate the fluidic medication to be injected into the patient.
- the safety syringe provides a sterile environment in which the fluidic medication may be withdrawn from a medication container and subsequently injected into the patient. More particularly, the safety syringe may have a barrier disposed at a distal end portion of a syringe body of the syringe.
- the barrier provides an impermeable air barrier between the environment (contaminated ambient air)and the variable fluid chamber.
- the barrier may be punctured at or about the same time when a needle assembly is attached to the syringe body. When the barrier is punctured, the needle assembly then acts as a cover such that contaminated ambient air does not enter into the variable fluid chamber after the barrier is punctured by the needle assembly.
- FIG. 1 is a perspective view of a prior art safety syringe
- FIG. 2 is a perspective view of a safety syringe with a barrier and a detached needle assembly which is attachable to the syringe body;
- FIG. 3 is a front cross-sectional view of the safety syringe shown in FIG. 2 ;
- FIG. 4 is an alternate embodiment. of attaching the harrier to the syringe body
- FIG. 5 is a bottom view of the barrier illustrating score lines forming eight pie-shaped pieces wherein the score lines are depressions formed in the barrier to control tearing, ripping or weakening of the barrier;
- FIG. 6 illustrates the pie shaped pieces shown in FIGS. 2 and 5 when the barrier is punctured by the needle assembly
- FIG. 7 is a bottom view of the barrier illustrating an alternate configuration of the score lines
- FIG. 8 is a bottom view of the barrier illustrating the score lines having a wavy configuration
- FIG. 9 is a front cross-sectional view of a safety syringe wherein the barrier is attached to an inner surface of the syringe body.
- FIG. 2 is a perspective view of a safety syringe 10 .
- the safety syringe 10 may comprise a plunger assembly 12 partially disposed within a syringe body 14 .
- Finger platforms 16 may be attached to a proximal end of the syringe body 14 to assist the user in traversing the plunger assembly 12 between a retracted position and a forward position.
- the safety syringe 10 may also comprise a detached needle assembly 18 which may be attached to the syringe body.
- One benefit of having the needle assembly 18 initially detached from the syringe body 14 and a selected needle assembly 18 attachable to the syringe body is that a medical professional may attach an appropriately sized needle 20 to the syringe body 14 depending cm the particular mediation to be administered to the patient.
- the safety syringe 10 is directed to a device and a method for maintaining sterility of fluidic medication during the entire process of withdrawing fluid medication from a medication container and injecting the fluidic medication to the patient.
- the safety syringe 10 accomplishes this by providing a barrier 22 between the environment which contains contaminated ambient air and a sterile variable fluid chamber 26 .
- the safety syringe 10 may be provided to a medical professional.
- the needle assembly 18 may initially be detached from the syringe body 14 .
- the plunger assembly 12 may be initially positioned in a retracted position when provided to the medical professional.
- a retracted position of the plunger assembly is where a piston 28 of the plunger assembly 12 is closer to a proximal end of the syringe body 14 compared to a distal end portion 30 of the syringe body 14 .
- the safety syringe 10 When the safety syringe 10 is assembled by the manufacturer, the safety syringe 10 is also sterilized to kill or eliminate harmful or potentially harmful viruses, bacteria and other unwanted contaminants that may be on or in the safety syringe 10 . More particularly, during the sterilization process, the inner surface of the variable fluid chamber 26 is sterilized. In particular, the inner surface of the variable fluid chamber 26 may be defined by a distal end 32 of the piston 28 , an inner surface 34 of the syringe body 14 and a proximal surface 36 of the barrier 22 .
- the needle assembly 18 is attached to the distal end portion 30 of the syringe body 14 .
- the barrier 22 is punctured to allow fluidic medication to be drawn into the variable fluid chamber 26 and subsequently ejected out of the variable fluid chamber 26 and injected into the patient via the needle 20 .
- the inner surface of the variable fluid chamber 26 does not come into contact with the contaminated ambient air 24 during the process of attaching the needle assembly 18 to the syringe body 14 .
- the barrier 22 prevents contaminated ambient air 24 from entering into the variable fluid chamber 26 .
- the barrier 22 is punctured to allow fluid and/or air to enter into or escape out of the variable fluid chamber 26 at or about the same time that the needle assembly 18 is attached to the syringe body 14 .
- the needle assembly 18 then behaves as a cover after the barrier 22 is punctured such that ambient air does not enter into the variable fluid chamber 26 and possibly contaminate the variable fluid chamber 26 due to airborne viruses, bacteria or unwanted contaminants in the ambient air 24 .
- the fluidic medication may be withdrawn from a medication vial and be administered to the patient.
- the needle 20 of the syringe 10 may be inserted into a medication container or vial.
- the plunger assembly may be traversed toward the forward position.
- the forward position is defined where the piston 28 is closer to the distal end portion 30 of the syringe body 14 compared to a proximal end of the syringe body 14 .
- sterilized air contained in the variable fluid chamber 26 is transferred into the medication container.
- Such transfer of sterilized air 38 increases the pressure within the medication container to assist in withdrawal of the fluidic medication therefrom.
- the medication container and safety syringe 10 may now be inverted such that the medication container is positioned over the safety syringe 10 .
- a distal tip 40 of the needle 20 may be positioned within the fluidic medication contained in the medication container.
- the plunger assembly 12 may be traversed back toward the retracted position. Such retraction of the plunger assembly 12 traverses the fluidic medication contained in the medication container into the variable fluid chamber 26 of the safety syringe 10 , As you will note, the fluidic medication in the variable fluid chamber 26 was not exposed to ambient air 24 .
- the medical professional may remove the needle 20 from the medication container and remove any sterilized air 38 from within the variable fluid chamber by inverting the safety syringe 10 , tapping on syringe body 14 to urge the sterilized air 38 toward the needle 20 , and then slightly traversing the plunger assembly 12 toward the forward position to eject the sterilized air 38 and a negligible amount of the fluidic medication out of the variable fluid chamber 26 and the needle assembly 18 . At this time, the medical professional may inject the patient with the fluidic medication contained in the variable fluid chamber 26 .
- the needle assembly 18 may be attachable to the to the syringe body 14 in a plurality of different methods known in the art, discussed herein and those that are developed in the future.
- the needle assembly 18 may have threads 42 disposed at a proximal end portion 44 of the needle assembly 18 .
- Mating threads 46 may be formed at the distal end portion 30 of the syringe body 14 .
- the mating threads 46 may he firmed on an inner surface 34 of the syringe body 14
- the threads 42 of the needle assembly 18 may be formed on an outer surface of the proximal end portion 44 of the needle assembly 18 .
- the threads 42 may be threaded onto the mating threads 46 .
- the needle assembly 18 may be formed with a stop flange 48 . As the needle assembly 18 is threaded into the syringe body 14 , the stop flange 48 may eventually contact the distal end portion 30 of the syringe body 14 .
- the needle assembly 18 may then be cinched or tightened onto the syringe body 14 to insure frictional attachment between the needle assembly 18 and the syringe body 14 .
- the above description of attaching the needle assembly 18 to the syringe body 14 is one embodiment of attaching the needle assembly 18 to the syringe body 14 .
- the safety syringe 10 discussed herein should not be limited only to this embodiment but also contemplates any other methods and embodiments.
- the barrier 22 may be an air impermeable membrane disposed over the distal end portion 30 of the syringe body 14 .
- the air impermeable membrane may he hermetically sealed about the outer periphery of the distal end portion 30 of the syringe body 14 .
- Such seal is identified as reference numeral 50 in FIG. 3 .
- the seal 50 may be formed via cold adhesive, hot adhesive, sonic welding as well as other methods known in the art or developed in the future,
- the air impermeable membrane prevents non-sterile air of the environment from entering into the variable fluid chamber 26 after the safety syringe 10 is removed from its packaging and prior to mounting of the needle assembly 18 onto the syringe body 14 .
- the barrier 22 may be attached to the distal end 52 of the syringe body 14 .
- Such attachment may be made by cold adhesive, hot adhesive, sonic welding, as well as other methods that may be know in the art or developed in the future.
- the seal between the barrier 22 or air impermeable membrane and the distal end 52 of the syringe body 14 may be identified as reference numeral 54 in FIG. 4 .
- the puncturing of the barrier 22 may be controlled.
- the puncturable barrier 22 may have a plurality of score lines 56 .
- the score lines urge the puncturable barrier 22 to tear or weaken at the score lines 56 to permit fluid to pass through the barrier 22 .
- the score lines 56 may be depressions formed on a proximal or distal side of the barrier 22 .
- FIG. 6 when the needle assembly 18 (not shown in FIG. 6 ) is attached to the syringe body 14 , pie-shaped pieces 58 of the harrier 22 are pushed into the variable fluid chamber 26 .
- the pie shaped pieces 58 are disposed between the threads 42 of the needle assembly 18 and the mating threads 46 of the syringe body 14 . Fluid (e.g., fluidic medication) may now pass into or out of the variable fluid chamber 26 .
- Fluid e.g., fluidic medication
- score lines 56 as shown in FIG. 5 are formed as in a plurality of pie-shaped pieces 58 , other configurations of the score lines 56 are contemplated.
- the score lines 56 may be formed on the puncturable harrier 22 as shown in FIG. 7 .
- FIG. 8 shows an alternative embodiment of a different configuration of the score lines 56 . As shown, each score line 56 may have a wavy pattern.
- the barrier 22 may be fabricated from an air impermeable material.
- the impermeable material may be plastic, paper, rubber, cloth, etc.
- the barrier 22 may be perforated but still be characterized as impermeable so long as a free flow of ambient air is not allowed to pass through the barrier 22 into the variable fluid chamber 26 .
- the barrier 22 may extend across the inner periphery of the syringe body 14 above the threads 42 of the mating threads 46 of the distal end portion 30 of the syringe body 14 .
- the threads 42 of the needle assembly 18 is threaded onto the mating threads 46 .
- the needle assembly 18 is threaded into the syringe body 14 until the stop flange 48 contacts the distal end 52 of the syringe body 14 .
- a protrusion 60 of the needle assembly 18 may puncture the barrier 22 .
- the protrusion 60 may at least slightly tear or weaken the barrier 22 to allow the fluidic medication to enter into or escape out of the variable fluid chamber 26 .
- the barrier 22 may be characterized as punctured if the barrier 22 is torn or weakened so as to permit fluid to permeate through the barrier 22 .
- the syringe 10 may be a sterilized vacuum assisted retractable safety syringe as discussed in U.S. application Ser. No. 11/511,668 ('668 application), filed Aug. 29, 2006, the entire content of which is incorporated herein by reference.
- the '688 application discusses how fluidic medication is injected into the patient in a sterile manner if the needle assembly is attached to the syringe body.
- the discussion of the '668 application may he employed in the safety syringe 10 with detached needle assembly discussed herein after the detached needle assembly 18 is attached to the syringe body 14 .
- the safety syringe 10 may be a vacuum assisted retractable safety syringe as discussed in U.S. Pat. No. 6,413, 236, filed Jun. 20, 2000 to Van Dyke, the entire content of which is incorporated herein by reference.
- the safety syringe 10 may have a variable vacuum compartment 62 (see FIG. 3 ).
- the variable vacuum compartment When the plunger assembly 12 is in the retracted position, the variable vacuum compartment has a pressure equal to ambient pressure. As the plunger assembly 12 is traversed toward the forward position, the variable vacuum compartment 62 increases in volume but additional air molecules are not introduced into the variable vacuum compartment 62 . The reason is that there is a seal between the piston 28 and the inner surface 34 of the syringe body 14 as well as a seal between a shaft 64 and proximal end of the syringe body 14 .
- variable fluid chamber 26 will not become contaminated by introduction of contaminants via the proximal end of the syringe body 14 .
- Ambient air does not enter into the variable vacuum compartment 62 through the proximal end of the syringe body 14 .
- variable vacuum compartment 62 and the variable fluid chamber 26 are separate compartments, during the process of injecting the patient with fluidic medication via the safety syringe 10 , the variable fluid chamber 26 and the variable vacuum compartment 62 share a common surface, namely, the inner surface 34 of the syringe body.
- the plunger assembly 12 is traversed between two positions, namely, the retracted position and the forward position. When the plunger assembly 12 is in the retracted position, the variable fluid chamber 26 typically has a larger volume compared to the variable vacuum compartment 62 .
- variable vacuum compartment 62 increases and the volume of the variable fluid chamber 26 decreases because the distal end 28 slides downward against the inner surface 34 of the syringe body 14 . Accordingly, a portion of the inner surface 34 of the syringe body which used to define the variable fluid chamber 26 now at least partially defines the variable vacuum compartment 62 .
- variable vacuum compartment 62 remains in a sterile state throughout the entire process of injecting the patient with fluidic medication because ambient air is not allowed into the variable vacuum compartment 62 via the proximal end of the syringe body 14 .
- Combining the vacuum assisted retractable safety syringe 10 with the barrier 22 provides a complete sterile environment in which the fluidic medication may be withdrawn into the variable fluid chamber 26 and subsequently injected into the patient without concern that the fluidic medication may become contaminated by exposure to the ambient air 24 or to contaminants that may have entered into the variable fluid chamber 26 via the proximal end of the syringe body 14 .
- the detached needle assembly 18 may be attachable to the syringe body 14 , as discussed in U.S. application Ser. No. 11/409,617, filed Apr. 24, 2006, the entire contents of which are expressly incorporated herein by reference. Additionally, the needle 20 of the needle assembly 18 may be retractable into the syringe body 14 as shown in U.S. application Ser. No. 11/409,617. Moreover, the barrier 22 may be attached to the distal end portion 30 of the syringe body 14 shown in FIGS. 1-5 of U.S. application Ser. No. 11/409,617.
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Abstract
Description
- This applications claims the benefits of U.S. Provisional Patent Application Ser. No. 60/857,088, the entire contents of which are incorporated herein by reference.
- The entire contents of U.S. application Ser. No. 11/511,668, filed Aug. 29, 2006 is expressly incorporated herein by reference. Additionally, the entire contents of U.S. Pat. No. 6,413,236, filed Jun. 20, 2000 to Van Dyke is expressly incorporated herein by reference. Also, the entire contents of U.S. application Ser. No. 11/409,617, filed Apr. 24, 2006 is expressly incorporated herein by reference.
- Not Applicable
- The present invention relates to a safety syringe wherein a variable fluid chamber is hermetically sealed off from contaminated ambient air until a needle assembly is attached to a syringe body such that fluidic medication may be withdrawn from a medication vial and injected into a patient in a sterile manner.
-
FIG. 1 illustrates a conventional safety syringe with a detached needle assembly. During use, a medical professional may select the appropriate sized needle based on the fluidic medication to be administered to the patient. Once the appropriate sized needle is selected, the needle assembly may be attached to the syringe body of the safety syringe. Unfortunately, a distal end of the syringe body is uncovered. As such, from the time that the syringe is removed from its packaging to the time that the needle assembly is attached to the syringe body, ambient air is allowed to flow into a variable fluid chamber which houses the fluidic medication right before the fluidic medication is injected into the patient. The ambient air flowed into the variable fluid chamber may contain viruses, bacteria or other unwanted contaminants which may he lodged onto the inner surface of the variable fluid chamber. When the fluidic medication is withdrawn into the variable fluid chamber, the contaminant lodged onto the inner surface of the variable fluid chamber may contaminate the fluidic medication to be injected into the patient. - Accordingly, there is a need in the art for a device and a method for injecting fluidic medication into the patient in a sterile manner.
- The safety syringe discussed herein addresses the needs discussed above, discussed below and those that are known in the art.
- The safety syringe provides a sterile environment in which the fluidic medication may be withdrawn from a medication container and subsequently injected into the patient. More particularly, the safety syringe may have a barrier disposed at a distal end portion of a syringe body of the syringe. The barrier provides an impermeable air barrier between the environment (contaminated ambient air)and the variable fluid chamber. The barrier may be punctured at or about the same time when a needle assembly is attached to the syringe body. When the barrier is punctured, the needle assembly then acts as a cover such that contaminated ambient air does not enter into the variable fluid chamber after the barrier is punctured by the needle assembly. As such, at no time during the process of removing the syringe from its packaging, attaching the needle assembly to the syringe body, withdrawing fluidic medication from a medication container and injecting the patient with the fluidic medication was the variable fluid chamber exposed or allowed to have ambient air flow therein. Hence, the fluidic medication injected into the patient is performed in a sterile manner.
- These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings, in which like numbers refer to like parts throughout, and in which:
-
FIG. 1 is a perspective view of a prior art safety syringe; -
FIG. 2 is a perspective view of a safety syringe with a barrier and a detached needle assembly which is attachable to the syringe body; -
FIG. 3 is a front cross-sectional view of the safety syringe shown inFIG. 2 ; -
FIG. 4 is an alternate embodiment. of attaching the harrier to the syringe body; -
FIG. 5 is a bottom view of the barrier illustrating score lines forming eight pie-shaped pieces wherein the score lines are depressions formed in the barrier to control tearing, ripping or weakening of the barrier; -
FIG. 6 illustrates the pie shaped pieces shown inFIGS. 2 and 5 when the barrier is punctured by the needle assembly; -
FIG. 7 is a bottom view of the barrier illustrating an alternate configuration of the score lines; -
FIG. 8 is a bottom view of the barrier illustrating the score lines having a wavy configuration; and -
FIG. 9 is a front cross-sectional view of a safety syringe wherein the barrier is attached to an inner surface of the syringe body. - Referring now to the drawings,
FIG. 2 is a perspective view of asafety syringe 10. In particular, thesafety syringe 10 may comprise aplunger assembly 12 partially disposed within asyringe body 14.Finger platforms 16 may be attached to a proximal end of thesyringe body 14 to assist the user in traversing theplunger assembly 12 between a retracted position and a forward position. Thesafety syringe 10 may also comprise a detachedneedle assembly 18 which may be attached to the syringe body. One benefit of having theneedle assembly 18 initially detached from thesyringe body 14 and a selectedneedle assembly 18 attachable to the syringe body is that a medical professional may attach an appropriately sizedneedle 20 to thesyringe body 14 depending cm the particular mediation to be administered to the patient. - The
safety syringe 10 is directed to a device and a method for maintaining sterility of fluidic medication during the entire process of withdrawing fluid medication from a medication container and injecting the fluidic medication to the patient. Thesafety syringe 10 accomplishes this by providing abarrier 22 between the environment which contains contaminated ambient air and a sterilevariable fluid chamber 26. - In particular, the
safety syringe 10 may be provided to a medical professional. Theneedle assembly 18 may initially be detached from thesyringe body 14. Moreover, theplunger assembly 12 may be initially positioned in a retracted position when provided to the medical professional. As used herein, a retracted position of the plunger assembly is where apiston 28 of theplunger assembly 12 is closer to a proximal end of thesyringe body 14 compared to adistal end portion 30 of thesyringe body 14. When thesafety syringe 10 is assembled by the manufacturer, thesafety syringe 10 is also sterilized to kill or eliminate harmful or potentially harmful viruses, bacteria and other unwanted contaminants that may be on or in thesafety syringe 10. More particularly, during the sterilization process, the inner surface of thevariable fluid chamber 26 is sterilized. In particular, the inner surface of thevariable fluid chamber 26 may be defined by a distal end 32 of thepiston 28, aninner surface 34 of thesyringe body 14 and aproximal surface 36 of thebarrier 22. - In use, to administer a fluidic medication to a patient, the
needle assembly 18 is attached to thedistal end portion 30 of thesyringe body 14. At or about the same time, thebarrier 22 is punctured to allow fluidic medication to be drawn into thevariable fluid chamber 26 and subsequently ejected out of thevariable fluid chamber 26 and injected into the patient via theneedle 20. - One of the many important aspects of the
safety syringe 10 is that the inner surface of thevariable fluid chamber 26 does not come into contact with the contaminatedambient air 24 during the process of attaching theneedle assembly 18 to thesyringe body 14. Before theneedle assembly 18 is attached to thesyringe body 14, thebarrier 22 prevents contaminatedambient air 24 from entering into thevariable fluid chamber 26. Thebarrier 22 is punctured to allow fluid and/or air to enter into or escape out of thevariable fluid chamber 26 at or about the same time that theneedle assembly 18 is attached to thesyringe body 14. At such time, theneedle assembly 18 then behaves as a cover after thebarrier 22 is punctured such that ambient air does not enter into thevariable fluid chamber 26 and possibly contaminate thevariable fluid chamber 26 due to airborne viruses, bacteria or unwanted contaminants in theambient air 24. - After the
needle assembly 18 is attached to thesyringe body 14, the fluidic medication may be withdrawn from a medication vial and be administered to the patient. In particular, theneedle 20 of thesyringe 10 may be inserted into a medication container or vial. At this time, the plunger assembly may be traversed toward the forward position. The forward position is defined where thepiston 28 is closer to thedistal end portion 30 of thesyringe body 14 compared to a proximal end of thesyringe body 14. As theplunger assembly 12 is traversed toward the forward position, sterilized air contained in thevariable fluid chamber 26 is transferred into the medication container. Such transfer of sterilizedair 38 increases the pressure within the medication container to assist in withdrawal of the fluidic medication therefrom. The medication container andsafety syringe 10 may now be inverted such that the medication container is positioned over thesafety syringe 10. Adistal tip 40 of theneedle 20 may be positioned within the fluidic medication contained in the medication container. Now theplunger assembly 12 may be traversed back toward the retracted position. Such retraction of theplunger assembly 12 traverses the fluidic medication contained in the medication container into thevariable fluid chamber 26 of thesafety syringe 10, As you will note, the fluidic medication in thevariable fluid chamber 26 was not exposed toambient air 24. The medical professional may remove theneedle 20 from the medication container and remove any sterilizedair 38 from within the variable fluid chamber by inverting thesafety syringe 10, tapping onsyringe body 14 to urge the sterilizedair 38 toward theneedle 20, and then slightly traversing theplunger assembly 12 toward the forward position to eject the sterilizedair 38 and a negligible amount of the fluidic medication out of thevariable fluid chamber 26 and theneedle assembly 18. At this time, the medical professional may inject the patient with the fluidic medication contained in thevariable fluid chamber 26. - In an aspect of the
safety syringe 10, theneedle assembly 18 may be attachable to the to thesyringe body 14 in a plurality of different methods known in the art, discussed herein and those that are developed in the future. By way of example and not limitation, as shown inFIG. 3 , theneedle assembly 18 may havethreads 42 disposed at aproximal end portion 44 of theneedle assembly 18.Mating threads 46 may be formed at thedistal end portion 30 of thesyringe body 14. More particularly, themating threads 46 may he firmed on aninner surface 34 of thesyringe body 14, whereas, thethreads 42 of theneedle assembly 18 may be formed on an outer surface of theproximal end portion 44 of theneedle assembly 18. To attach theneedle assembly 18 to thesyringe body 14, thethreads 42 may be threaded onto themating threads 46. To lock theneedle assembly 18 onto thesyringe body 14, theneedle assembly 18 may be formed with astop flange 48. As theneedle assembly 18 is threaded into thesyringe body 14, thestop flange 48 may eventually contact thedistal end portion 30 of thesyringe body 14. Theneedle assembly 18 may then be cinched or tightened onto thesyringe body 14 to insure frictional attachment between theneedle assembly 18 and thesyringe body 14. The above description of attaching theneedle assembly 18 to thesyringe body 14 is one embodiment of attaching theneedle assembly 18 to thesyringe body 14. Thesafety syringe 10 discussed herein should not be limited only to this embodiment but also contemplates any other methods and embodiments. - In an aspect of the
safety syringe 10, various types ofbarriers 22 arc contemplated. By way of example and not limitation, as shown inFIG. 3 , thebarrier 22 may be an air impermeable membrane disposed over thedistal end portion 30 of thesyringe body 14. The air impermeable membrane may he hermetically sealed about the outer periphery of thedistal end portion 30 of thesyringe body 14. Such seal is identified asreference numeral 50 inFIG. 3 . Theseal 50 may be formed via cold adhesive, hot adhesive, sonic welding as well as other methods known in the art or developed in the future, The air impermeable membrane prevents non-sterile air of the environment from entering into thevariable fluid chamber 26 after thesafety syringe 10 is removed from its packaging and prior to mounting of theneedle assembly 18 onto thesyringe body 14. - In another aspect of the
safety syringe 10, as shown inFIG. 4 , thebarrier 22 may be attached to thedistal end 52 of thesyringe body 14. Such attachment may be made by cold adhesive, hot adhesive, sonic welding, as well as other methods that may be know in the art or developed in the future. The seal between thebarrier 22 or air impermeable membrane and thedistal end 52 of thesyringe body 14 may be identified as reference numeral 54 inFIG. 4 . - In an aspect of the
safety syringe 10, the puncturing of thebarrier 22 may be controlled. In particular, as shown inFIG. 2 andFIG. 5 , thepuncturable barrier 22 may have a plurality of score lines 56. The score lines urge thepuncturable barrier 22 to tear or weaken at the score lines 56 to permit fluid to pass through thebarrier 22. The score lines 56 may be depressions formed on a proximal or distal side of thebarrier 22. As shown inFIG. 6 , when the needle assembly 18 (not shown inFIG. 6 ) is attached to thesyringe body 14, pie-shapedpieces 58 of theharrier 22 are pushed into thevariable fluid chamber 26. The pie shapedpieces 58 are disposed between thethreads 42 of theneedle assembly 18 and themating threads 46 of thesyringe body 14. Fluid (e.g., fluidic medication) may now pass into or out of thevariable fluid chamber 26. - Although the score lines 56 as shown in
FIG. 5 are formed as in a plurality of pie-shapedpieces 58, other configurations of the score lines 56 are contemplated. By way of example and not limitation, the score lines 56 may be formed on thepuncturable harrier 22 as shown inFIG. 7 .FIG. 8 shows an alternative embodiment of a different configuration of the score lines 56. As shown, eachscore line 56 may have a wavy pattern. - In an aspect of the
barrier 22, thebarrier 22 may be fabricated from an air impermeable material. By way of example and not limitation, the impermeable material may be plastic, paper, rubber, cloth, etc. Thebarrier 22 may be perforated but still be characterized as impermeable so long as a free flow of ambient air is not allowed to pass through thebarrier 22 into thevariable fluid chamber 26. - In another aspect of the
safety syringe 10, as shown inFIG. 9 , thebarrier 22 may extend across the inner periphery of thesyringe body 14 above thethreads 42 of themating threads 46 of thedistal end portion 30 of thesyringe body 14. To mount theneedle assembly 18 to thesyringe body 14, thethreads 42 of theneedle assembly 18 is threaded onto themating threads 46. Theneedle assembly 18 is threaded into thesyringe body 14 until thestop flange 48 contacts thedistal end 52 of thesyringe body 14. At or about the same time, aprotrusion 60 of theneedle assembly 18 may puncture thebarrier 22. By way of example and not limitation, theprotrusion 60 may at least slightly tear or weaken thebarrier 22 to allow the fluidic medication to enter into or escape out of thevariable fluid chamber 26. Thebarrier 22 may be characterized as punctured if thebarrier 22 is torn or weakened so as to permit fluid to permeate through thebarrier 22. - In an aspect of the
safety syringe 10, thesyringe 10 may be a sterilized vacuum assisted retractable safety syringe as discussed in U.S. application Ser. No. 11/511,668 ('668 application), filed Aug. 29, 2006, the entire content of which is incorporated herein by reference. The '688 application discusses how fluidic medication is injected into the patient in a sterile manner if the needle assembly is attached to the syringe body. In this regard, the discussion of the '668 application may he employed in thesafety syringe 10 with detached needle assembly discussed herein after thedetached needle assembly 18 is attached to thesyringe body 14. Additionally, thesafety syringe 10 may be a vacuum assisted retractable safety syringe as discussed in U.S. Pat. No. 6,413, 236, filed Jun. 20, 2000 to Van Dyke, the entire content of which is incorporated herein by reference. - The
safety syringe 10 may have a variable vacuum compartment 62 (seeFIG. 3 ). When theplunger assembly 12 is in the retracted position, the variable vacuum compartment has a pressure equal to ambient pressure. As theplunger assembly 12 is traversed toward the forward position, thevariable vacuum compartment 62 increases in volume but additional air molecules are not introduced into thevariable vacuum compartment 62. The reason is that there is a seal between thepiston 28 and theinner surface 34 of thesyringe body 14 as well as a seal between ashaft 64 and proximal end of thesyringe body 14. One benefit of the vacuum assistedretractable safety syringe 10 is that the inner surface of thevariable fluid chamber 26 will not become contaminated by introduction of contaminants via the proximal end of thesyringe body 14. Ambient air does not enter into thevariable vacuum compartment 62 through the proximal end of thesyringe body 14. - Although the
variable vacuum compartment 62 and thevariable fluid chamber 26 are separate compartments, during the process of injecting the patient with fluidic medication via thesafety syringe 10, thevariable fluid chamber 26 and thevariable vacuum compartment 62 share a common surface, namely, theinner surface 34 of the syringe body. For example, theplunger assembly 12 is traversed between two positions, namely, the retracted position and the forward position. When theplunger assembly 12 is in the retracted position, thevariable fluid chamber 26 typically has a larger volume compared to thevariable vacuum compartment 62. When theplunger assembly 12 is traversed toward the forward position, the volume of thevariable vacuum compartment 62 increases and the volume of thevariable fluid chamber 26 decreases because thedistal end 28 slides downward against theinner surface 34 of thesyringe body 14. Accordingly, a portion of theinner surface 34 of the syringe body which used to define thevariable fluid chamber 26 now at least partially defines thevariable vacuum compartment 62. - If
ambient air 24 were to enter into thevariable vacuum compartment 62 via the proximal end of thesyringe body 14, then contaminants contained in theambient air 24 may be lodged onto theinner surface 34 of the syringe body. As theplunger assembly 12 is traversed between the retracted position and the forward position, the lodged contaminants on theinner surface 34 of the syringe body may eventually enter into the variable fluid chamber and thereby contaminate any fluidic medication drawn into thevariable fluid chamber 26. - A benefit of the vacuum assisted retractable safety syringe is that the
variable vacuum compartment 62 remains in a sterile state throughout the entire process of injecting the patient with fluidic medication because ambient air is not allowed into thevariable vacuum compartment 62 via the proximal end of thesyringe body 14. - Combining the vacuum assisted
retractable safety syringe 10 with thebarrier 22 provides a complete sterile environment in which the fluidic medication may be withdrawn into thevariable fluid chamber 26 and subsequently injected into the patient without concern that the fluidic medication may become contaminated by exposure to theambient air 24 or to contaminants that may have entered into thevariable fluid chamber 26 via the proximal end of thesyringe body 14. - In an aspect of the
syringe 10, thedetached needle assembly 18 may be attachable to thesyringe body 14, as discussed in U.S. application Ser. No. 11/409,617, filed Apr. 24, 2006, the entire contents of which are expressly incorporated herein by reference. Additionally, theneedle 20 of theneedle assembly 18 may be retractable into thesyringe body 14 as shown in U.S. application Ser. No. 11/409,617. Moreover, thebarrier 22 may be attached to thedistal end portion 30 of thesyringe body 14 shown inFIGS. 1-5 of U.S. application Ser. No. 11/409,617. - The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein. Further, the various features of the embodiments disclosed herein can be used alone, or in varying combinations with each other and are not intended to be limited to the specific combination described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.
Claims (21)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/550,788 US20150080848A1 (en) | 2006-04-24 | 2014-11-21 | Puncturable membrane for safety syringe |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/409,617 US7947020B2 (en) | 2005-05-09 | 2006-04-24 | Retractable safety syringe |
US11/511,668 US20080097306A1 (en) | 2006-08-29 | 2006-08-29 | Sterilized syringe |
US85708806P | 2006-11-06 | 2006-11-06 | |
US11/982,808 US20080114307A1 (en) | 2006-11-06 | 2007-11-05 | Puncturable membrane for safety syringe |
US12/544,865 US8398601B2 (en) | 2006-11-06 | 2009-08-20 | Puncturable membrane for safety syringe |
US13/829,928 US8894618B2 (en) | 2006-11-06 | 2013-03-14 | Puncturable membrane for safety syringe |
US14/550,788 US20150080848A1 (en) | 2006-04-24 | 2014-11-21 | Puncturable membrane for safety syringe |
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US13/829,928 Continuation US8894618B2 (en) | 2006-04-24 | 2013-03-14 | Puncturable membrane for safety syringe |
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US20150080848A1 true US20150080848A1 (en) | 2015-03-19 |
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US13/829,928 Active US8894618B2 (en) | 2006-04-24 | 2013-03-14 | Puncturable membrane for safety syringe |
US14/550,788 Abandoned US20150080848A1 (en) | 2006-04-24 | 2014-11-21 | Puncturable membrane for safety syringe |
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US12/544,865 Active 2029-07-19 US8398601B2 (en) | 2006-04-24 | 2009-08-20 | Puncturable membrane for safety syringe |
US13/829,928 Active US8894618B2 (en) | 2006-04-24 | 2013-03-14 | Puncturable membrane for safety syringe |
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US10335555B2 (en) | 2004-09-03 | 2019-07-02 | L.O.M. Laboratories Inc. | Single-use pneumatic safety syringe providing gas-driven needle retraction |
US10369572B2 (en) | 2015-07-31 | 2019-08-06 | Point Of Care Diagnostics, Llc | Reagent dispensing apparatus |
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USD831204S1 (en) * | 2015-03-02 | 2018-10-16 | Neomed, Inc. | Enteral syringe |
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US10624817B2 (en) | 2015-03-24 | 2020-04-21 | Neomed, Inc. | Oral administration coupler for back-of-mouth delivery |
US10682287B2 (en) | 2015-07-14 | 2020-06-16 | Neomed, Inc. | Dosing control coupling for enteral fluid transfer and enteral couplings and syringes |
JP6694501B2 (en) | 2015-07-14 | 2020-05-13 | ネオメッド,インクNeomed,Inc. | Dosage control joint for enteral fluid flow |
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US10335555B2 (en) | 2004-09-03 | 2019-07-02 | L.O.M. Laboratories Inc. | Single-use pneumatic safety syringe providing gas-driven needle retraction |
US20130072941A1 (en) * | 2011-09-16 | 2013-03-21 | Francisca Tan-Malecki | Cement Injector and Cement Injector Connectors, and Bone Cement Injector Assembly |
US10369572B2 (en) | 2015-07-31 | 2019-08-06 | Point Of Care Diagnostics, Llc | Reagent dispensing apparatus |
Also Published As
Publication number | Publication date |
---|---|
US20130204228A1 (en) | 2013-08-08 |
US20110046601A1 (en) | 2011-02-24 |
US8894618B2 (en) | 2014-11-25 |
US8398601B2 (en) | 2013-03-19 |
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