[특허]Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same

Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61M-029/00 A61M-031/00
출원번호	US-0512430 (1974-10-07)
발명자 / 주소	Freeman Jerre M. (1509 Peabody Ave. Memphis TN 38104)
인용정보	피인용 횟수 : 123 인용 특허 : 0

초록 ▼

A plug of suitable dimension and material is removably inserted into the upper and/or lower punctal apertures of the eye to block the opening and the attendant canaliculus so as to thereby prevent the drainage of lacrimal fluid therethrough. The plug is comprised of tissue-tolerable, readily sterilizable material, such as polytetrafluorethylene (Teflon), or hydroxyethylmethacrylate (HEMA) hydrophilic polymer, methyl methacrylate, silicon, stainless steel or other inert metal material. The rod-like plug is formed with an oversized tip or barb portion that dilates and blockingly projects into the canaliculus, a smaller neck or waist portion upon which the punctum sphincter ring tightens, and a relatively larger, smooth head portion which rests upon the top of the punctal opening and prevents the plug from passing down into the canaliculus. In some embodiments the plug is impregnated with or otherwise acts as a carrier vehicle for an ophthalmic medication which is stored and delivered on a sustained release basis to the eye. A method for inserting the plug into the punctal opening is described, utilizing a dilator tool for enlarging the punctum and associated canaliculus and an inserter tool for facilitating the grasping, manipulation and insertion of the plug. The punctal plug has been found useful in treating keratoconjunctivitis sicca (dry eye) and is believed to be suitable for treating other ophthalmic ailments where retention of lacrimal fluid on the surface of the eye and in the lacrimal lake is desired or where sustained release of an ophthalmic medication to the eye by using the plug as a medication carrier is desired.

대표청구항 ▼

A removable rod-like plug for blocking lacrimal fluid flow through the punctum and associated canaliculus of the human eye comprising: a projecting tip portion having a maximum cross-sectional dimension in the range of about 1.0 to 1.4 mm which is sufficient to occlude the canaliculus when inserted therein, a middle neck portion of smaller cross-section than the largest part of said tip portion with a maximum dimension in the range of about 0.6 to 0.8 mm and adapted to be tightened upon by the punctum sphincter ring, said tip and neck portions cooperating with said canaliculus and punctum sphincter ring respectively to prevent accidental extrusion of said plug, and a head portion of larger cross-section than said neck portion and adapted to rest on the surface of the punctal aperture and prevent said plug from passing down into the canaliculus, with the overall length of said plug comprised of said tip, neck and head portions being not less than about 3.2 mm.

이 특허를 인용한 특허 (123)

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Webb Nicholas J., Punctum plug.
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Varner, Signe Erickson; Dejuan, Eugene; Barnes, Aaron Christopher; Shelley, Terry Harrison; Cooney, Michael J., Reservoir device for intraocular drug delivery.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same 원문보기

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Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same 원문보기

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대표청구항 ▼

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