Medical instrument

• US 6,007,520 A
• Filed: 09/30/1997
• Issued: 12/28/1999
• Est. Priority Date: 02/12/1992
• Status: Expired due to Term

• Current Assignee: Daikyo Gomu Seiko,Ltd.
• Original Assignee: Daikyo Gomu Seiko,Ltd.
• Inventors: Sudo, Morihiro
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): NGUYEN, ANH TUAN TUONG
• Application Number:
  US08/941,755
• Time in Patent Office: 819 Days
• Field of Search: 604/19, 604/29, 604/265, 604/266, 604/408, 526/113, 526/115, 526/116, 526/118, 526/119, 526/126, 526/281, 428/519, 428/494, 428/492, 428/339, 264/496, 264/494, 264/524, 264/239
• US Class Current: 604/181
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2013 having two piercing ends
• CPC Class Codes: A61J 1/2072 for internal venting
• CPC Class Codes: A61J 1/2089 Containers or vials which are to be joined to each other in order to mix their contents combinations of vial and syringe for mixing their contents A61J1/2096
• CPC Class Codes: A61L 29/049 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 29/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 31/041 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61M 5/2429 by telescoping of ampoules or carpules with the syringe body
• CPC Class Codes: A61M 5/28 Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
• CPC Class Codes: A61M 5/284 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/31513 Piston constructions to improve sealing or sliding
• CPC Class Codes: C08L 65/00 Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain C08L7/00 - C08L57/00, C08L61/00 take precedence; Compositions of derivatives of such polymers
• CPC Class Codes: Y10T 428/31833 Next to aldehyde or ketone condensation product or addition polymer from unsaturated monomers

Abstract

A medical instrument capable of maintaining medicament liquids such as pharmaceuticals, nutriments in high quality and dosing correctly and sanitarily is provided. This medical instrument comprises a material containing a resin formed of a cyclic olefin compound or a bridged polycyclic hydrocarbon compound, as a polymeric component.

Claims

1. A medical device comprising a molded article having an outer wall defining an inner space to hold a fluid, said molded article comprising a resin comprising a cyclic olefin compound or a bridged polycyclic hydrocarbon compound,

wherein the cyclic olefin compound is at least one member selected from the group consisting of monocyclic olefin compounds, alkyl derivatives of monocylic olefin compounds, and acrylate derivatives of monocyclic olefin compounds,

wherein the bridged polycyclic hydrocarbon compound has at least one unsaturated bond in the ring or in a substituent thereof,

wherein the content of the cyclic olefin compound in the molded article is at least 30 weight percent, and

wherein said resin is molded and not laminated.

2. The medical device according to claim 1, wherein the resin further comprises at least one copolymer member selected from the group consisting of lower olefins, aromatic compounds, vinyl monomers of lower olefins, and vinyl monomers of aromatic compounds.

3. The medical device according to claim 1, wherein the resin is a mixture comprising the cyclic olefin compound or the bridged polycyclic hydrocarbon compound and at least one copolymer member selected from the group consisting of non-cyclic olefinic resins and synthetic rubbers.

4. The medical device according to claim 1, wherein the resin has a bromine number of at most 1.

5. The medical device according to claim 1, wherein the resin has a softening point of at least 90°

C.

6. The medical device according to claim 1, wherein the article comprises at least one laminated layer made from the resin.

7. The medical device according to claim 1, wherein the article is an injection barrel.

8. The medical device according to claim 1, wherein the article is a transfuser.

9. The medical device according to claim 1, wherein the article is a liquid transfuser set component.

10. The medical device according to claim 1, wherein the article is a blood gathering instrument.

11. The medical device according to claim 1, wherein the article is a blood transfusing instrument.

12. The medical device according to claim 1, wherein the article is a blood set part.

13. The medical device according to claim 1, wherein the article is a kidney dialysis device.

14. The medical device according to claim 1, wherein the article is a catheter.

15. The medical device according to claim 1, wherein the article is a tube.

16. The medical device according to claim 1, wherein the article is a combined syringe and container.

17. The medical device according to claim 1, wherein the article contains a needle.

18. The medical device according to claim 1, wherein the molded article is produced by injection molding.