Blood sample optimization device

A device, comprising:

• an inlet port;
• an outlet port;
• a chamber connected with the inlet port;
• a sampling channel connected with the inlet port;
• and
• a movable element configured to perform a movement based on a pressure differential across the movable element, the movement being from a first position that allows the chamber to receive a first portion of blood, to a second position that allows blood through the sampling channel.

A device, comprising:

• an inlet port;
• an outlet port;
• a chamber connected with the inlet port;
• a sampling channel connected with the inlet port;
• and
• a movable element configured to perform a movement based on a force applied to the movable element due at least in part to a first portion of blood contacting the movable element, the movement being from a first position that allows the chamber to receive the first portion of blood, to a second position that allows blood through the sampling channel.

A device, comprising:

• an inlet port;
• an outlet port;
• a chamber connected with the inlet port;
• a sampling channel connected with the inlet port;
• and
• a movable element configured to perform a linear movement from a first position that allows the chamber to receive a first portion of blood, to a second position that allows blood through the sampling channel, the movable element comprising a stopping element configured to engage a surface to stop the movable element to at least temporarily maintain the movable element in the second position.