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US3134380A - Shielded hypodermic needle - Google Patents

Shielded hypodermic needle Download PDF

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Publication number
US3134380A
US3134380A US17189962A US3134380A US 3134380 A US3134380 A US 3134380A US 17189962 A US17189962 A US 17189962A US 3134380 A US3134380 A US 3134380A
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Prior art keywords
needle
shield
hub
end
pad
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Thomas A Armao
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Thomas A Armao
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/001Apparatus specially adapted for cleaning or sterilising syringes or needles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3257Semi-automatic sleeve extension, i.e. in which the triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
    • A61M5/326Fully automatic, i.e. in which the triggering does not require a deliberate action by the user
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3256Constructional features thereof, e.g. to improve manipulation or functioning having folding ring sections
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3257Semi-automatic sleeve extension, i.e. in which the triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
    • A61M5/326Fully automatic, i.e. in which the triggering does not require a deliberate action by the user
    • A61M2005/3267Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/42Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for desensitising skin, for protruding skin to facilitate piercing, or for locating point where body is to be pierced

Description

May 26, 1964 T. A. ARMAO SHIELD@ HYPODERMIC NEEDLE:

Filed Feb. 8, 1962 Y INVENTOR. HOMAS A. ARMAO g .QH ad" fw;

ATTORNEY nh. .wv

M mm|||||||||lmmni Il IIJ m mw United States Patent() SHIELBEI) HYPODERMIC NEEDLE Thomas A. Arrnao, 1 7 Sth St., Brooklyn, NX. Filed Feb. 8, 1962, Ser. No. 171,399 9 Claims. (Cl. 12S-215) 'Ihis invention relates to hypodermic needles as used with syringes. More particularly it relates to a needle having a shield which need not be removed prior to use of the needle and which can be disposable along with the needle itself. In addition the shielded needle may have an antiseptic and anesthetic means attached to the end of the shield.

It has been recognized that it is desirable to shield a hypodermic needle from the patients View, particularly when it is to be used in the area of the face and mouth,

in order to avoid frightening or alarming the patient.

Slideable covers as an integral part of a syringe are disclosed in United States Patents Nos. 1,845,036 to Busher, 1,921,034 to La Marche, 2,571,653 to Bastin and 2,845,065 to Gabriel as well as 2,876,770 to White. While such covers attached to the syringe body adequately shield the needle from view until use they present problems of sterilization after use and are therefore not compatible` with the disposable needles currently nding increased utilization.

An object of the present invention is to provide a shielded hypodermic needle for use in a syringe with a shield integral with the needle and not the syringe and thus disposable With the needle.

A further object of the invention is to provide such a collapsible needle shield which will maintain a positive pressure on the area of tissue surrounding the point of injection so as to provide a degree of pressure anesthesia.

Yet another object of the invention is to provide a collapsible needle shield having integral with it an absorbent pad which can be saturated with an antiseptic and/or a topical anesthetic.

.Other objects of the invention will be apparent from the description which follows.

FIGURE 1 is a side view of a syringe with an attached needle shielded according to the invention.

FIGURE 2 is a view of the end of the needle which is attached to the syringe, showing the annular opening for the end of the syringe.

FIGURE 3 is a partial view of the end of the shielded needle with a removable cover in place.

FIGURE 4 is a sectional View of an embodiment of the shield of the invention including a spring, the shield being shown before use of the needle.

FIGURE 5 is a sectional View of the shield of FIGURE 4 after use of the needle.

FIGURE 6 is a sectional View of an embodiment of the shield of the invention with a self-compressible shield, the shield being shown before use of the needle.

FGURE 7 is a sectional view of the shield of FIG- URE 6 after use of the needle.

In FIGURE 1 the shielded needle B is attached to the syringe A with the end 11 of the syringe abutting and entering into the collar 13 of the shielded needle. A protective cap 15 covers the needle end of the shield 17 until just before use of the needle. In FIGURE 2 can be seen the annular space 19 inside the collar 13 aroundv the needle 21 into which space the end 11 of the syringe A is inserted. Prior to the use of the needle this annular space 19 and the endV of the needle 21 are protected by a removable cover 23, as can be seen in FIGURE 3.

The invention can be described in detail with reference to FIGURES 4 and 5 which illustrate one embodiment of the invention. The needle 21 is Xed in a hub 25 having a collar 13. A spring 27 iits around the hub 25 and abuts the collar 13. Immediately surrounding the spring 27 is a shield 17. Positioned in the end of the spring 27 is an absorbent pad 29 which can be impregnated with an antiseptic and/ or an anesthetic and forming a shield end wall penetrable by the needle 21. Holes 31 are provided near the end of the shield 17 to permit the escape of air as the shield is collapsed. A protective cap 15 covers the Vabsorbent pad 29 as well as the holes 31 in the shield 17, thereby protecting the sterility of the needle 21 and the absorbent pad 29 prior to use. This protective cap 15 is removed just before the needle is to be used.

Another embodiment of the invention is shown in FIG- URES 6 and 7. It differs from that of FIGURES 4 and 5 in that no spring is used but the shield 17 is made in a compressible shape Vand of a material which resists compression, thereby maintaining pressure on the tissue at' the point of injection. Holes 31 to permit the escape of air are provided along the length of the shield 17 and the protective cap 15 has been accordingly extended the length of the shield 17. A guide tube 33 has been provided to extend above the absorbent pad 29 to guide the needle 21 through the absorbent pad 29 when the shielded needle is used and also to keep the needle 21 in line with the absorbent pad 29 when the absorbent pad is used to swab thearea of the injection prior to the injection. VIt is to be understood that any of these features can also be incorporated in the embodiment shown in FIGURES 4 and 5 if desired.

The hub 25 can be made of any shapeable or formable material such as wood, metal, plastic and the like, although a plastic such as polyethylene, polypropylene, nylon or a phenolic is preferred. The needle 21 can be any conventional hollow hypodermic needle. When a spring 27 of metal, plastic or other suitable material is used the shield 17 can be of any compressible material such as metal foil, treated paper, a lrn of plastic such as polyethylene or polypropylene, or the like. When no spring is used the shield 17 is pleated or otherwise preformed to compress in a regular manner and is made of a material which will resist compression suiiciently to maintain some pressure on the pad against the tissue surrounding the point ofV injection. Certain plastics are suitable for this material, such as intermediate and high density polyethylene and the like.

The absorbent pad 29 can be made of any suitable material such as cotton, felt, sponge rubber, porous plastic, or'the like which will absorb the anesthetic and antiseptic. Suitable antiseptics include iodine, hexa'chlorophene, merthiolate and the like while suitable anesthetics include lidocaine, benzocaine, butyn and the like. `Breferably the anesthetic and/ or antiseptic is mixed in a sal-ve or grease such as petroleum jelly, aquaphor or the like and this product is impregnated on the pad.

The guide tube 33 is made of any suitable material such as a stiff plastic. Similarly the protective cap 15 and the removable cover 33 are made of any suitable material suchv as plastic, i.e. polyethylene.

With the protective cap and removable cover in place the shieldedneedle is a sterile unit as received by the user. For use the removable cover 23 is removed and the shielded needle is readily attached to any cartridge syringe by screwin y or force-iitting the end of the cartridge syringe into the annular space 19 inside the collar 13, with the end of the needle entering the cartridge. The shielded needle attached to'the syringe is depicted in FIG- URE 1. To make the injection the protective cap 15 is rst removed and the instrument is then pressed against the place Where the injection is to be made, the absorbent pad making initial contact With the tissue. If desired the absorbent pad can be used as a swab by moving it around the area prior to making the injection. 'Ihe guide tube preserves the alignment of the needle with the hole in the pad during the swabbing.

If desired the attachment of the spring and the shield to the hub can be strengthened with any suitable glue or cement. While the shielded needle is particularly suited as a disposable unit, it can if desired or in an emergency be reused after sterilization of theV entire unit.`

The present invention provides all of the advantages of a shielded needle in a unit which is disposable and provided additional advantages in the medicated absorbent pad which it includes. Thus the needle is completely hidden from the patients view until after the injection is made. This is particularly important with children and with those patients having a strong fear of needles and injections. The resistance to compression of the shield, Whether from the spring or from the nature of the material from whichthe shield is made, provides for a degree of pressure anesthesia from the pressure of the pad or the circumference of the shield on the area where the injection is to be made. This is similar to the pressure anesthesia employed by some practitioners who lightly strike or press the area of injection just prior to making the injection.

The absorbent pad, While not essential to the invention, provides many additional advantages. A grave problem in all injections is the possible introduction or carrying of infection from the surface of the tissue where the injection is to be made into the interior of the tissue when the needle is inserted. This problem can be overcome by careful pre-sterilization of the area wherethe injection is to be made. The absorbent pad of the invention,- if saturated with an antiseptic, insures that the area will be sterilized and greatly simplifies the procedure. The inclusion of a guide tube in the device of the invention makes it possible to thoroughly swab the area while preserving the alignment of the needle with the hole in the pad.

The absorbent pad also provides a simple and effective means to apply a topical anesthetic to the area of the in-v jection. This is important not only to provide greater comfort for the patient but because needle breakage during an injection often results from sudden reaction of the patient to the pain of the needle insertion. While the pad is adapted to being impregnated with an antiseptic and/or anesthetic at the time of manufacture, it can be packed dry and dipped in the medicaments just before use if desired.

An important advantage of the invention which is to be emphasized is that the entire unit is sterilized at the time of manufacture and this sterility is preserved until the moment of use by the protective cap and removable cover which seal both ends of the unit. 'I'hus the present invention makes possible the advantages of a sterile disposable needle aswell as a shielded needle, and, in the preferred embodiment, the further advantagesof a medicated swabbing pad at the end of the shield.

Even with the advantages of hiding the needle in the shield and of topically anesthetizing so as to minimize patient reaction, the possibility of needle breakage still exists, asit must in any syringe needle. It had been shown that most cases of needle breakage occu-r right at the base or hub part of the needle assembly. With an ordinary needle the needle is frequently inserted right up to the hub with the result that a needle broken at the hub is quite dicult to retrieve as the end of the needle is flush with the skin or tissue. In the needle of the invention however the shield, even when fully compressed, prevents insertion of the needle up to the hub. If a needle does break at the hub enough of the needle protrudes beyond the skin or tissue to permit relatively easy grasping and removal of the needle.

It is to be understood that the scope of this invention is to be limited only by the claims following and is not limited to the particular embodiments described herein, but that the scope of the invention includes any variations and modifications which may occur to those skilled in the art and which fall Within the scope of the claims.

4 What is claimed is: l. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle Vextending through said hub and a collapsible integral shield atlixed to said hub, said shield being tubular and enveloping said needle on one side of said hub, said shield extending in the uncollapsed state beyond the end of said needle, having a shield end wall penetrable by said needle and being capable of collapsing upon itself toward said hub when said needle is inserted into a patient, said shield being made of a material which resists compression su'iciently to apply an anesthetic pressure` to the area of skin pierced by said needle.

2. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub and av collapsible integral shield axed to said hub, said shield being tubular and enveloping said needle on one side of said` hub, said shield extending in the uncollapsed state beyond the end of said needle, having a shield end wall penetrable by said needle and being preformed to be capable of collapsing by compressing upon itself-toward said hub when said needle is inserted into a patient, said preformed shield being made of a material which resists compression suciently to apply an :anesthetic pressure to the area of skin pierced by said needle.

3. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield aiixedtosaid hub and a coil spring abutting said hub inside said shield, said shield being tubular and with said spring enveloping said needle on one side of said hub, said shield extending in the uncollapsed state beyond the end of said needle, having a shield end wall penetrable by said needle and being capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said spring being compressed as said shield collapses.

4. A disposa'ble hypodermic needle assembly compris.

ing a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield athxed to said hub, said shield lbeing tubular, envelopingsaid needle on one side of said hub and extending in the uncollapsed state beyond the end of said needle,

and an absorbent pad positioned in the end of said shieldY away from said hub to form a shield end wall penetrable by said needle, said shield being capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said pad being pierced by said needle and moving toward said hub with said shield as said shield collapses, said shield being made of a material which resists compression suiciently to apply an anesthetic pressure to the area of skin pierced by said needle.

5. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield aixed to said hub, saidshield being tubulanenveloping said needle on one side of said hub and extending in the uncollapsed state beyond the end of said needle, an absorbent pad positioned in the end of said shield away from said hub to form a shield end wall penetrable by said needle, and a hollow guide tube of sufficient diameter to permit free passage of said needle centered in said pad, said shield being capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said needle passing through said guide tube and said guide tube andpad moving toward said hub with said shield as said shield collapses, said shield being made of a material which resists compression sufficiently to apply an anesthetic pressure to the area skin pierced byv needle extending through said hub, a collapsible integralVr shield affixed to said hub, said shield being, tubular. en-

veloping said needle on one side of said hub and extending in the uncollapsed state beyond the end of said needie, and an absorbent pad positioned in the end of said shield away from said hub to form a shield end wall penetrable by said needle, said shield being preformed to be capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said pad being pierced by said needle and moving toward said hub with said shield when said shield collapses, said preformed shield being made of a material which resists compres` sion suiiciently to apply an anesthetic pressure to the area of skin pierced by said needle.

7. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield atlxed to said hub, a coil spring abutting said hub inside said shield, said shield being tubular and with said spring enveloping said needle on one side of said hub, said shield extending in the uncollapsed state beyond the end of said needle, and an absorbent pad positioned in the end of said shield away from said hub to form a shield end wall penetrable by said needle, said shield being capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said spring being compressed as said shield collapses and with said pad being pierced by said needle and moving toward said hub with said shield as said shield collapses.

8. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield afdxed to said hub, said shield being tubular, enveloping said needle on one side of said hub and extending in the uncollapsed state beyond the end of said needle, an absorbent pad positioned in the end of said shield away from said hub to form a shield end wall penetrable by said needle, and a hollow guide tube of sucient diameter to permit free passage of said needle centered in said pad, said shield being preformed to be capable of collapsing upon itself toward said hub when said needle is inserted into a patient, with said needle passing through said guide tube and said guide tube and pad moving toward said hub with said shield as said shield collapses, said preformed shield being made of a material which resists compression suiciently to apply an anesthetic pressure to the area of skin pierced by said needle.

9. A disposable hypodermic needle assembly comprising a hub adapted for attachment to a syringe, a hollow needle extending through said hub, a collapsible integral shield atlixed to said hub, a coil spring abutting said hub inside said shield, said shield being tubular and with said spring enveloping said needle on one side of said hub, said shield extending in the uncoll-apsed state beyond the end of said needle, an absorbent pad positioned in the end of said shield away from said hub to form a shield end wall penetrable by said needle, and a hollow guide tube of suicient diameter to permit free passage of said needle centered in said pad, said shield being capable of co1- lapsing upon itself toward said hub when said needle is inserted into a patient, with said spring being compressed as said shield collapses and with said needle passing through said guide tube and said guide tube and said hub moving toward said hub with said shield as said shield collapses.

References Cited in the file of this patent UNITED STATES PATENTS 1,921,034 Le Marche Aug. 8, 1933 2,674,246 Bower Apr. 6, 1954 2,693,186 Riker et al. Nov. 2, 1954 2,696,212 Dunmire Dec. 7, 1954 2,845,065 Gabriel July 29, 1958 2,876,770 White Mar. l0, 1959 2,935,067 Bonet May 3, 1960 FOREIGN PATENTS 1,193,221 France Apr. 27, 1959

Claims (1)

1. A DISPOSABLE HYPODERMIC NEEDLE ASSEMBLY COMPRISING A HUB ADAPTED FOR ATTACHMENT TO A SYRINGE, A HOLLOW NEEDLE EXTENDING THROUGH SAID HUB AND A COLLAPSIBLE INTEGRAL SHIELD AFFIXED TO SAID HUB, SAID SHIELD BEING TUBULAR AND ENVELOPING SAID NEEDLE ON ONE SIDE OF SAID HUB, SAID SHIELD EXTENDING IN THE UNCOLLAPSED STATE BEYOND THE END OF SAID NEEDLE, HAVING A SHIELD END WALL PENETRABLE BY SAID NEEDLE AND BEING CAPABLE OF COLLAPSING UPON ITSELF TOWARD SAID HUB WHEN SAID NEEDLE IS INSERTED INTO A PATIENT, SAID SHIELD BEING MADE OF A MATERIAL WHICH RESISTS
US3134380A 1962-02-08 1962-02-08 Shielded hypodermic needle Expired - Lifetime US3134380A (en)

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