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研究生: 黃郁淳
Huang, Yu-Chun
論文名稱: 靜脈輸注方式對新生兒血中Amikacin濃度之影響
Influence of Intravenous Infusion Procedure on the Amikacin Serum Levels in Neonates.
指導教授: 高雅慧
Yang, Yea-Huei Kao
林其和
Lin, Chyi-Her
林毓志
Lin, Yuh-Jyh
學位類別: 碩士
Master
系所名稱: 醫學院 - 臨床藥學研究所
Institute of Clinical Pharmacy
論文出版年: 2004
畢業學年度: 92
語文別: 中文
論文頁數: 151
中文關鍵詞: Amikacin藥物治療濃度監測靜脈輸注方式新生兒加護病房
外文關鍵詞: amikacin, TDM, NICU, intravenous infusion method
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  • 研究背景
      在成大醫院之新生兒加護病房(NICU),當懷疑新生兒受到院內感染時,amikacin併用ampicillin/sulbactam為經驗性治療之首選藥物。在文獻上關於amikacin之藥動學研究,發現藥物在新生兒之分布體積及排除半衰期,隨著小兒成長過程之生理變化,有明顯之個體間差異,尤其是低出生體重之早產兒,因此建議新生兒使用amikacin時,應進行治療濃度監測,以確保療效及避免毒性,而過去在院內尚未有執行經驗。在臨床上執行藥物治療濃度監測時,amikacin建議在藥品輸注完後30分鐘抽血,而目前新生兒加護病房之靜脈輸注方式,若無法在特定時間內將藥品輸注完,將可能影響amikacin治療濃度監測之結果及判讀,因此為本研究希望探討之議題。

    研究目的
    本研究之目的主要包括:
    (1) 利用體外試驗,評估新生兒加護病房現行之靜脈輸注方式,對藥品輸注時間之影響。
    (2) 收集新生兒amikacin治療濃度監測之執行經驗,並且探討可能影響血中濃度之因素。

    體外試驗之研究方法
      利用新生兒加護病房使用之靜脈輸注管及輸注幫浦(IMED),將amikacin分別由輸注管上三個不同注射Y-site投予,並設定輸注流速為5、10、30 ml/hr。在藥品輸注期間,藉由輸注管末端收集之amikacin藥物量,評估不同條件下,輸注完至少95%藥量之時間。

    研究結果
      Amikacin之輸注時間會隨著流速及注射部位而改變,當流速為5 ml/hr,由輸注管之遠端Y-site給藥後,輸注完95%藥量至少需要三小時。若要確保amikacin在30分鐘輸注完,則流速5 ml/hr時,應由近端Y-site給藥,流速10及30 ml/hr時,應由中間Y-site給藥。對照臨床上治療濃度監測之結果,延長藥品輸注時間,會顯著影響到amikacin之最高血中濃度值。

    結論
      目前新生兒加護病房使用之靜脈輸注方式,在不同流速及注射部位下,會影響藥品輸注時間,根據體外試驗之研究結果,建議amikacin可統一改由輸注管之中間Y-site給藥,則在流速5~30 ml/hr時,藥品輸注時間為30~60分鐘。
    在新生兒amikacin之治療濃度監測方面,由於本研究期間,實際執行抽血監測之人數偏低,因此無法探討其它可能影響血中濃度之因素,未來在新生兒執行amikacin治療濃度監測,仍需要加以推廣,才能進一步評估。

    Background: In the NICU of National Cheng Kung University Hospital (NCKUH), amikacin combined with ampicillin/sulbactam is the drug of choice in newborns of suspected nosocomial infection. The pharmacokinetic studies of amikacin in neonates had demonstrated significant inter-individual variability in drug distribution and elimination, especially in the low birth weight premature infants. The therapeutic drug monitoring (TDM) of amikacin in neonates has been recommended to ensure effectiveness and avoid toxic side effect, but a standard procedure has never been established in our hospital. We observed that the administering procedure of amikacin infusion may result in erroneous dosing, which can further lead to therapeutic failure.

    Objectives: An in vitro study was designed to investigate whether the intravenous infusion method influence the time of complete delivery of amikacin. And, an exact procedure for drug administration can then be formulated.

    Methods of the in vitro study: We used the infusion set and infusion pump in the NICU. Amikacin was injected into the infusion set at three injection Y-sites set at 5, 10, 30 ml/hr flow rate. The amount of amikacin collected at varied infusion intervals was determined and the time required for complete drug delivery was calculated.

    Results: The delivery time of amikacin varied with infusion rate and injection site. The longest drug delivery time was 3 hours at a flow rate of 5 ml/hr when drug was injected into the distal Y-site. Only when amikacin was injected into the proximal Y-site at a flow rate of 5 ml/hr and the middle Y-site at the flow rate of 10 and 30 ml/hr can the drug be delivered completely within 30 minutes. Comparing with the results of TDM, the delay of drug delivery will obviously influence the peak level of amikacin.

    Conclusions: The infusion procedure in the NICU influenced drug delivery time at various infusion rates and injection sites. We recommend that amikacin should be injected into the middle Y-site to ensure drug delivery time within 30~60 minutes at flow rate of 5~30 ml/hr.

    中文摘要………………………………………………………I 英文摘要……………………………………………………III 誌謝……………………………………………………………V 縮寫表 ……………………………………………‥……‥VI 目錄……………………………………………………‥‥VII 表目錄 ………………………………………………‥……XI 圖目錄 …………………………………………………‥XIII 第一篇 靜脈輸注方式對新生兒血中amikacin濃度之影響 ‥‥‥‥…………………‥‥‥‥‥‥‥‥‥‥‥‥‥‥1 第壹章 研究背景‥……………………‥‥‥‥‥‥‥‥1 第貳章 文獻回顧……………………………………‥‥‥5 第一節 新生兒加護病房之院內感 ‥…………………‥ 5 1.1 危險因子 ……………………………………‥‥‥‥5 1.2 常見致病菌 ‥‥…………………………………‥‥7 1.3 臨床表現及經驗性抗生素治療 ‥‥……………‥‥9 第二節 Amikacin之藥效學特性 ‥…………………‥‥11 2.1 藥物特性及藥理作用‥‥‥……………‥‥‥‥‥11 2.2 抗菌範圍及臨床應用‥‥………………………‥‥12 2.3 抗藥性‥‥…………………………………‥‥‥‥13 第三節 Amikacin之藥物動力學 ‥……‥‥……………15 3.1 吸收…………………………………………‥‥‥‥15 3.2 分布‥‥……………………‥………………………16 3.3 排除‥‥…………………………………………‥‥17 第四節 Amikacin之建議劑量及治療血中濃度 ‥‥‥‥20 第五節 Amikacin之藥物不良反應 ‥‥…………‥‥‥24 5.1 腎毒性‥‥‥………………………………………‥24 5.2 耳毒性‥‥………………………………………‥‥25 第六節 新生兒靜脈給藥 ‥………………………………27 6.1 靜脈輸注幫浦‥‥………………………………‥‥27 6.2 靜脈輸注方式之種類‥‥‥……………………‥‥30 6.2.1 順行輸注系統‥‥‥…………………………‥‥30 6.2.2 逆行輸注系統‥‥‥…………………………‥‥30 6.2.3 注射針幫浦輸注系統…‥‥‥……………‥‥‥32 6.3 新生兒靜脈給藥需考慮之因素……‥‥………‥‥34 第七節 影響藥品輸注時間之因素 ……………‥‥‥‥36 7.1 流速及藥品注射部位………………………‥‥‥‥36 7.2 藥品之比重‥‥………………………………………40 7.3 藥品注射體積……………………………‥‥‥‥‥41 第八節 靜脈輸注方式對血中濃度監測之影響 ‥………42 8.1 最高血中濃度‥……………………‥‥‥‥………42 8.2 分布體積及排除半衰期……………………‥‥‥‥44 第九節 Amikacin血中濃度監測之參考準則 ‥………‥46 第參章 研究目的 ……………………………‥‥‥……48 第肆章 靜脈輸注體外試驗之研究方法 …………‥‥‥49 第一節 研究材料 ‥………………………………‥‥‥49 1.1 藥品及靜脈輸注裝置………………………‥‥……49 1.2 實驗器材…………………………………‥‥………49 1.3 測量儀器及分析試劑…………………………‥‥‥49 第二節 標準溶液之配製 …………………………‥‥‥50 第三節 標準校正曲線及再現性評估 …………‥‥‥…52 3.1 標準校正曲線…………………………………‥‥…52 3.2 再現性評估………………………‥‥………………52 第四節 靜脈輸注管輸注體積之測量方式 ‥……………53 第五節 流速設定方式 …………………………‥‥‥…54 第六節 研究流速 ……………………‥……………‥‥55 第七節 檢品藥量之計算方式 ……‥‥‥………………57 第八節 統計分析 …………………………………………58 8.1 資料分析‥……………………………………………58 8.2 統計軟體………………………………‥‥‥………58 第伍章 靜脈輸注體外試驗之研究結果 ‥‥……………59 第一節 標準校正曲線及再現性評估 ………………‥‥59 1.1 標準校正曲線………………………………………‥59 1.2 再現性評估………………………………………‥‥61 第二節 靜脈輸注管距末端之體積 …………………‥‥63 第三節 檢品藥量之計算結果 ………………………‥‥64 第四節 藥品輸注時間 ……………………………‥‥‥71 第陸章 Amikacin血中濃度監測執行結果 ………‥‥…75 第一節 執行方法 ……………………………………‥‥75 第二節 研究對象基本資料 …………………………‥‥76 第三節 血中濃度監測結果 …………………………‥‥79 第柒章 討論 …………………………………………‥‥85 第一節 Amikacin靜脈給藥之體外試驗 …………‥‥…85 1.1 藥品濃度之測定方法……………………………‥‥85 1.2 藥品輸注時間……………………………………‥‥87 第二節 Amikacin之血中濃度監測 ………………‥‥…91 2.1 不同研究執行結果之比較…………………………‥91 2.2 影響amikacin血中濃度之因素…………………‥‥93 2.3 藥品稀釋方式對血中濃度之影響………………‥‥95 2.4 監測頻次及抽血時間之建議………………………‥96 第三節 研究限制 ……………………………………‥‥97 第四節 未來研究方向 ………………………………‥‥98 第捌章 結論 …………………………………………‥‥99 參考文獻………………………………………………‥‥100 第二篇 新生兒加護病房臨床藥事服務 ‥……………110 第一節 靜脈給藥方式建議‥…………‥………………111 1.1 藥品稀釋方式可能產生之問題 ‥‥…………‥…111 1.2 稀釋方式之建議 ‥‥…………………………‥…115 第二節 藥物諮詢服務‥………………………‥………118 2.1 新生兒藥物治療之臨床問題 ‥‥…………‥‥…119 2.2 孕婦及哺乳婦女用藥 ‥‥…………………‥‥…129 2.3 注射劑混合後之安定性及相容性 ‥‥‥……‥…136 第三節 Aminophylline血中濃度監測 ……‥…………139 第四節 藥物使用之臨床觀察……………………‥‥…143 4.1 Erythromycin用於早產兒餵食不佳 ……‥‥…‥143 (附錄一) 使用Amikacin之病患資料紀錄表 …‥‥‥148 (附錄二) 成大醫院臨床藥事服務簡易個案記錄表 ‥149 (附錄三) Aminophylline治療藥物濃度監測記錄表‥150 (附錄四) Erythromycin在早產兒餵食不佳之治療記錄表 ‥151

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