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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Controlled internal drug release ： ウィキペディア英語版 Controlled internal drug release Controlled internal drug release (CIDR) devices are used in livestock for the synchronization of estrus. They are T-shaped devices with a silicone-coated nylon core. The silicone coating is impregnated with progesterone. CIDRs are inserted intra-vaginally using a specialized applicator. The flexible wings collapse for facilitated insertion and expand once placed appropriately within the vagina.〔 The expansion of the wings retains its position; CIDRs have very high retention rates that may exceed 97%.〔Eric Grant. 2006. Understanding CIDR. ''National Association of Animal Breeders.'' Feb 1, 2006. Retrieved March 20, 2012, from Beef Magazine: http://beefmagazine.com/mag/beef_understanding_cidr〕 A thin nylon tail remains exteriorized and is used for removal.〔 Once inserted, CIDRs provide slow-release administration of progesterone, which artificially extends the luteal phase.〔 Plasma progesterone levels rapidly increase upon insertion, and remain relatively consistent while in place. Following CIDR removal, progesterone levels decrease rapidly.〔 Occasionally, vaginal irritation may occur. This is normal and does not impact the effectiveness of the device or the animal’s performance.〔 There are several types of CIDRs available, including CIDR-B for cattle, CIDR-S for sheep and CIDR-G for goats. CIDRs are similar to the progesterone-releasing intravaginal device (PRID), also used for synchronization of estrous cycles in livestock. ==History== CIDRs were developed by AHI Plastic Moulding Company in Hamilton, New Zealand, in conjunction with the Ministry of Agriculture and Forestry (New Zealand).〔 Developmental trials began in 1981. The CIDR-S was licensed in 1986 and the CIDR-G in 1988. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Controlled internal drug release」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.