The invention relates to an apparatus (2, 3), comprising a mating unit (20-1, 20-2) for releasably attaching the apparatus (2) to a medical device (1) or for releasably receiving at least a part of the medical device (1). The apparatus (2, 3) further comprises one or more optical sensors (25, 26) and/or one or more acoustical sensors (27) for determining information related to a condition and/or use of the medical device (1). The invention further relates to a system comprising such an apparatus (2, 3) and such a medical device (1), to a method (500, 600, 700) and a computer program (61) for determining information related to a condition and/or use of such a medical device (l), and to a computer-readable medium (60)storing such a computer program (61).本發明係關於一種裝置(2,3)，其包含：一連接單元(20-1,20-2)，用以將該裝置(2)以可拆卸方式連接至一醫療裝置(1)或以可拆卸的方式容納該醫療裝置(1)之至少一部分。該裝置(2,3)更包含：一或多個光學感應器(25,26)及/或一或多個聲學感應器(27)，用以判定與該醫療裝置(1)之狀況及/或使用有關的資訊。本發明係更關於一種包含此類裝置(2,3)與此類醫療裝置(1)的系統，並關於用以判定與該醫療裝置(1)之狀況及/或使用有關之資訊的方法(500,600,700)及電腦程式(61)，以及關於儲存此類電腦程式(61)的電腦可讀媒體(60)。
