Instrument propulsion device

An instrument advancement device for advancing an instrument through a vascular access device, the instrument advancement device comprising: a housing having a distal end and a proximal end, where the distal end is configured to be coupled to the vascular access device; an instrument at least partially housed within the housing wherein the instrument has an advanced position in which a distal end of the instrument extends beyond a distal end of the housing and a retracted position in which the distal end of the instrument is housed within the housing; an actuator configured to move the instrument between an advanced position and a retracted position; and an indicator configured to be visible only when the instrument is in the advanced position. 一种器械推进装置，该器械推进装置用于将器械推进通过血管通路装置，该器械推进装置包括：壳体，该壳体具有远端和近端，其中，该远端被配置为耦接到血管通路装置；器械，该器械被至少部分地容纳在该壳体内，其中，该器械具有推进位置和撤回位置，在推进位置，该器械的远端延伸超出该壳体的远端，在撤回位置，该器械的远端被容纳在该壳体内；致动器，该致动器被配置为使该器械在推进位置与撤回位置之间移动；以及指示器，该指示器被配置为仅在该器械位于推进位置时可见。