Techniques and devices associated with blood sampling

A device for withdrawing blood from the skin and/or from beneath the skin of a subject, the device comprising:

• a fluid transporter;
• a vacuum chamber having an internal pressure less than atmospheric pressure before blood is withdrawn into the device;
• and
• a storage chamber, separate from the vacuum chamber, for receiving blood withdrawn from the subject through the fluid transporter when a negative pressure is applied to the skin of the subject.

A device for withdrawing blood from the skin and/or from beneath the skin of a subject, the device comprising:

• a fluid transporter;
• a first storage chamber for receiving blood withdrawn from the subject through the fluid transporter, the storage chamber having an internal pressure less than atmospheric pressure prior to receiving blood;
• and
• a reaction entity contained within the first storage chamber able to react with an analyte contained within the blood, wherein a product of the reaction entity with the analyte is determinable.

A method for analyzing an extractable medium from a subject, comprising:

• positioning an analysis device, comprising a pathway, adjacent the skin of the subject and, while the device is adjacent the skin:
• activating an access component of the device to connect the extractable medium with the pathway of the device;
• activating a pressure controller of the device to urge the extractable medium into the device via the pathway;
• exposing the medium to a sensor of the device and determining at least one condition of the extractable medium from the subject;
• and
• generating a signal relating to the condition of the medium determined by the sensor.