The present invention relates to a barrier membrane arrangement for a medical device for providing a substantially liquid tight seal between a piercing member and a barrier member and a method for manufacturing such a barrier member arrangement. The present invention also relates to a method for connecting a first and a second medical device at the barrier member arrangement. The barrier member arrangement comprises a first member, a second member and a barrier member. The second member can be interlocked to the first member by means of a connection arrangement at an optional stage by a user. After interlocking the second member to the first member, the barrier member has been compressed to provide for an increased leakage security. The barrier member arrangement also provides for a prolonged working life of the barrier member and any medical device which comprises such a barrier member arrangement.本発明は、穿刺部材と仕切り部材(１２)との間の実質的な液密シールをもたらす医療器具のための隔膜装置(１０，１１０)と、このような仕切り部材装置を製造するための方法とに関する。本発明はまた、第１および第２の医療器具を仕切り部材装置(１０，１１０)にて連結するための方法にも関する。この仕切り部材装置(１０，１１０)は、第１の部材(１１)と、第２の部材(１３)と、仕切り部材(１２)とを具えている。利用者は、第２の部材(１３)を任意の段階で連結装置(１８)により第１の部材(１１)に連結することができる。第２の部材(１３)を第１の部材(１１)に連結した後の仕切り部材(１２)は、増大した漏洩予防を与えるために圧縮されている。この仕切り部材装置(１０，１１０)はまた、仕切り部材(１２)およびこのような仕切り部材装置(１０，１１０)を具えたあらゆる医療器具の引き延ばされた動作寿命をもたらす。
