OA10171A

OA10171A - Safely-operated multishot sidearm injection site using a needleless injector

Info

Publication number: OA10171A
Application number: OA60682A
Authority: OA
Inventors: Earl Hanson
Original assignee: Maximwell Internat Co Ltd
Priority date: 1992-08-18
Filing date: 1995-06-30
Publication date: 1996-12-18
Also published as: CA2142870A1; HU9500525D0; PT101668A; WO1994004218A1; HUT73523A

Abstract

A multishot sidearm injection site using a needleless injector is made up of a main body (21), an extension sidearm (22) and a silicone valve body (23); the extension sidearm (22) is attached to one side of the main body (21) and the silicone valve body (23) is laterally disposed in the through hole (212) of the main body (21) and in abutment against the extension sidearm (22). When medical solution is to be infused into a patient by means of the present injection site, a needleless syringe is inserted into the conical seat (221) of the extension body (22) with the microaperture valve stem (222) thereof fitting inside the male luer member of the applied injection syringe. An operation on the syringe will produce a pressure in the tubular injection opening (223), which will force the silicone valve body (23) to open so as to permit the injected medical solution to enter the delivery tube of the main body.

Description

010171 -* 4-'

INJECTION SITE ÜSING A NJlEPLSLESg.-JNJJÎglQB B ACKGROÜND „OZJTliS—lig^EKT.ISK5

The présent invention relates to a safely operatedmultishot sidearm injection site using a needlelessinjector which is equipped with a main body and anextension sideara and a cylindrical silicone valve body 10 which is laterally disposed inside the aain body and inabutaent with the extension sideara so as to seal atubular injection tube disposed through the center of aaicroaperture valve stea disposed in the extensionsideara into which a needleless syringe is inserted with 15 the valve stea protruding into the inside of the maleaember of a standard tapered Luer fitting of injectionsyringes.When the needleless syringe is actuated, apressure is applied to the valve body and push it open soas to permit the medical solution to be infused into the 20 delivery tube of the main body, the loss of the pressureor removal of the injection syringe will make the valvebody shut so that no air will be induced into thedelivery tube. The principal characteristic of theprésent invention is the capability of prévention of 25 embolisme as a resuit of air induction into the infusiondelivery tube.

Referring to Fig. 1, a typical injection needle is connected to a dropper by way of a flexible rubber tube* « 30 10; and another improved ¥ shaped injection site is

I illustrated in Fig. 2 which is camprised of a main tube11 and a branch tube 12 disposed at an angle at the eideof and in-conununication with the main tube 11. Thebranch tube 12 is sealed by a rutober cork 13. The main 35 tube 11 is coupled to a delivery tube at each end. When apatient subject to a dropping injection is supplied withanother medical solution, the comnon way is to infuse thesolution directly into the rubber tube 10 or the Xaranch 2 010171 tube 12 via the rubber cork 13 whereby the patient isfree fron another painful injection. The prior artinjection sites hâve the following disadvantages: 5 1. A nurse has to hold the injection syringe with a single hand and piérce the pointed needle thereof intothe rubber tube; 10 or the rubber cork 13 held by anotherhand; it is rather possible that the needle canaccidently hurt the hand of the nurse, naking the nurse lû easily afiectecl when the wound is in contact with theblood of a patient who suffere frow AIDS which iscontagious to people via blood or hunan aucous newbrane.Therefore, the prior art injection sites are not safeenough to operate especially in a tiwe when AIDS is 15 threatening the innocent people by accidentai contacts. 2. The repeated piercing of the pointed needle into therubbex tube 10 or the rubber cork 13 will produceminiature rubber débris which can be dropped into the 20 injection delivery tube, and aight cause bad effects onthe patient subject to a dropping operation. 3. There are miniature holes produced on the rubbertube 10 or the rubber cork 13 as a resuit of repeated 25 piercings by the pointed needles, causing air to côneinto the delivery tube; and the air induction into theinfusion delivery tube will generate embolisas. 30

Therefore, the primary object of the présent invention isto provide a safely operated aultishot injection siteusing a needleless injecter to infuse nedical solutioninto the delivery tube so that no accidents caused by 35 pointed needles can happen.

Another object of the présent invention is to provide a 3 010171 eafely operated aultishot injection site uaing aneedleless injector vhich is able to infuse médicalsolution into the injection delivery tube via a valvecontrolled injection tube so that no piercing holes vill i> produce on the injection site and embolisms caused by theair induction into the infusion delivery tube can beprevented.

BRIEP DESCRIPTION OP THE PBAWItiGS 10

Fig. 1 is a diagram shoving a prier art injection neêdlefor use in connection to a general dropper;

Fig. 2 is a sectional view shoving a prior art ¥ shaped1*J injection site;

Fig. 3 is a perspective diagram shoving the explodedconponents of the présent invention; 20 Fig. 4 is a perspective diagran shoving the assenblythereof;

Fig. S is a sectional diagran shoving the structure ofthe présent invention; 25

Fig. 6 is a diagran shoving the application of the —présent invention to a dropper System; ~

Fig. 7 is a sectional diagran shoving the enbodinent of· 30 the présent invention;

Fig. 8 is a sectional diagran shoving another enbodinentof the présent invention.

Referring to Figs. 3, 4, 5, the safely operated aultishot 35 010171 injection site of the présent invention is coaprised of asain body 21, an extension sidearni 22 and a valve body 23vherein the injection site is aade of clear engineeringtheraoplastic of sufficient clarity and stremgth toprovide Visual observations of internai fluid flov andthe valve body 23 is aade of flexible silicone.

The main body 21 is aade in a tubular fora vith a tube211 disposed therein and a laterally oriented throughhole 212 in coaaunication vith the tube 211 of the nainbody 21 is intégrally foraed thereon for the insertion ofthe extension sideara 22 into the sain body 21.

The extension sideara 22 is in a tubular fora and isprovided vith a closed end vith a tapered inner vall 221defined therein. An invard protruded valve stea 222 isdisposed at the center of the closed end of the sideara22 and is provided vith a tubular injection hole 223through vhich the aedical solution is infused into theinjection delivery tube. A pair of lugs 224 are disposedat the periphery of the opposite end of the closed end.

The valve body 23 is aade in a cylindrical fora and basan outer diameter saaller than the saallest diaaeter ofthe through hole 211 so that vhen the valve body 23 islaterally disposed in the through hole 211, there is _still rooa for the passage of aedical solution.

Referring to Figs. 4, 5, in the asseably, the extension*sideara 22 is inserted into the laterally orientedthrough hole 212 of the nain body 21 after thecylindrical valve body 23 is laterally located in thenain body 21; and the closed end of the extension sideara22 is in abutaent against the valve body 23 vith thetubular injection through hole 223 sealed thereby.

As shovn in Fig. 6, the présent invention is connected to 010171 a dropper by way of cloeure piercing device 30, a filterdevice 31 is coupled to a volune controller 32 and thedelivery tube 33 is extended therefroa; and the bottoaend of the delivery tube 33 is connected to the présentsite 20, and another delivery tube 33 is coupled to aninjection needle at the end of the dropper systea.

As shovn in Pig. 7, vhen another medical solution is tobe added to the dropper systea, a needleless syringe 40taking the solution froa a medical container is used toinfuse the same into the dropper systea. The protrudedend 41 of the syringe 40 is inserted into tapered throughhole 221 of the extension sidearm 22 vith the valve sten222 inserted into the hole of the protruded end 41. Duet.o the taper structure of the through hole 221 so thatthe air in the through hole can be expelled therefroawhen the protruded end 41 of the syringe 40 is insertedinto the through hole 221 and no air vill be pumped intothe delivery tube during the injection of the medicalsolution froa the syringe 40, preventing the cause ofembolisas in the blood vessel of the patient.

When the syringe 40 is in action to deliver medicalsolution into the site, pressure vill force the siliconevalve body 23 to open so as to permit the solution to beinfused into the delivery tube 33 via the tubular _injection hole 223; vhen the loss of the pressure orrénovai of the syringe 40 takes place, the deformed valvebody 23 vill résumé to its original shape and nake the <injection hole 223 so as to block the air to enter.Therefore, no aatter hov many times of the use of theinjection site, no air at ail can enter the droppersystem. As shovn in Fig. 8, the protruded end of thesyringe can be provided vith additional threads 42 so asto make the syringe 40 firaly secured to the lugs 224 ofthe extension sideara 22. 010171 6 Ιΐ can be apparently seen that the présent invention basthe following advantages: 1. The use of needleless syringe to infuse médical5 solution can effectively protect the nursing personnel froo being accidentally hurt by needles. 2 The nursing personnel are free from the risk of beingfatally affected as a resuit of hurting by needles. 10 3.. The use of the needleless injection effectively avoïdsthe repeated piercings of the delivery tube so as toprevent embolisms from happening as a resuit of airinduction into the dropper System. 15 4. No rubber débris is produced due to the piercing of anaedle. 5. The injection syringe can be firoly retained in place20 due to thy additional threads on the protruded end of the syringe vhich is attached to the lugs of the extensionsidearm.

Claims

010171
1. A safely opérated aultishot sideara injection siteusing a needleless injecter coaprising; a main body having a tubular through ho le disposed5 therein being provided vith a laterally oriented through hole vhich coaaunicates with said tubularthrough hole; an extension sideara having a closed end with aprotruded valve stem vhich is provided vith an 10 injection tube therein disposed at the center of said closed end thereof and a pair of lugebeing disposed at the periphery of the oppositeend of said closed end; a cylindrieal valve body nade of silicone 15 having a dianeter sualler than the saallest dianeter of said tubular 'through hole of saidnain body; vherein said cylindrieal valve body islaterally disposed in said tubular through hole 20 of said nain body and said closed end of said extension sideara is inserted into thelaterally disposed through hole of said nain _body vith said valve body in sealing abutaentvith said injection tube of said extension 25 sideara.