# US 4,393,864 A · Syringe shields and methods for using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,393,864 A - Document ID: US4393864A - Status: Granted - Kind: A - Application number: 06/257,961 - Filed: 1981-04-27 - Granted: 1983-07-19 - Earliest claimed: 1980-02-13 - Assignees: Thomas Jefferson University - Inventors: Benjamin M. Galkin; Raymond Boon; Rudolph V. Gilliam; Chan H. Park - Web page: https://patentgrep.com/patent/US4393864A ## CPC - A61J 1/2096: {Combination of a vial and a syringe for transferring or mixing their contents} - A61B 6/107: {Protection against radiation, e.g. shielding} - A61M 5/1782: {Devices aiding filling of syringes in situ (combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003)} - A61M 5/1785: {comprising radioactive shield means (syringe shields or holders for storage of radioactive sources G21F5/018)} - A61J 1/201: {having one piercing end} - A61M 2205/583: by visual feedback - A61N 5/1007: {Arrangements or means for the introduction of sources into the body} - A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract The present invention relates to syringe loading shields for use with syringes during the drawing of aliquots of radioactive materials from shielded vials containing same. Each syringe loading shield is provided with means for shielding radiation emanating from the mouth of the vial during the material-withdrawal, syringe loading process. In a preferred embodiment, the syringe loading shield comprises a radiation detector for detecting and calibrating the radioactive dosage of the material which is drawn into the syringe barrel. In the preferred embodiment, a substantially tubular shield having a high density viewing window recessed therein is disclosed which is comprised of a plurality of sheaths. A novel hand shield and syringe for use with radioactive materials are also disclosed. sp This is a continuation of application Ser. No. 121,211, filed Feb. 13, 1980 now U.S. Pat. No. 4,307,713. ## Claims ### Claim 1 A hand shield for use with a syringe at least during the use of that syringe for drawing aliquots of radioactive materials from a vial, comprising a shielding disc, said disc having an aperture centrally defined therein for receiving a syringe barrel therethrough, said aperture being slightly oversized with respect to the syringe barrel to permit a rotation of the barrel axis with respect to the plane of the disc of between about 5 and 25 degrees. ### Claim 2 (depends on 1) The invention of claim 1 wherein said disc has a diameter sufficient to shield at least the user's fingers while disposed on either side of the syringe barrel. ### Claim 3 (depends on 2) The invention of claim 2 wherein the diameter of said disc is between 8 and 17 cm. ### Claim 4 (depends on 3) The invention of claim 3 wherein the diameter of said disc is between 11 and 15 cm. ### Claim 5 (depends on 4) The invention of claim 4 wherein the diameter of said disc is about 13 cm. ### Claim 6 (depends on 1) The invention of claim 1 wherein said aperture is at least about 0.5 mm larger than the outer diameter of the syringe barrel. ### Claim 7 A syringe for use with radioactive materials; comprising: a. a low-density barrel; b. a low-density plunger slidingly disposed within said barrel, and c. a plunger shield means connected to said plunger for shielding radiation transmitted within said barrel towards the user of said syringe, said plunger shield means being applied over the end of said plunger which is proximate to said user. ### Claim 8 A syringe for use with radioactive materials; comprising: a. a low-density barrel; b. a low-density plunger slidingly disposed within said barrel, and c. a plunger shield means connected to said plunger for shielding radiation transmitted within said barrel towards the user of said syringe, said plunger comprising a piston, and wherein said shield means is encapsulated within said piston.