Method of operating a large-volume delivery device

A method of operating a medicament delivery device, comprising:

• selecting a medicament delivery device, comprising:
• an external housing including a substantially rigid body;
• a moveable medicament container sled;
• a needle insertion mechanism;
• a fluid path operable to connect a needle of the needle insertion mechanism with a medicament container;
• a medicament container including a container body and plunger, wherein the medicament container is secured in a portion of the moveable medicament container sled;
• and
• a drive mechanism;
• applying the device to a skin surface of a patient;
• activating the delivery device to cause the drive mechanism to apply pressure to the plunger of the medicament container, wherein activating the medicament delivery device comprises releasing a latch mechanism of the drive mechanism.

A method of operating a medicament delivery device, comprising:

• selecting a medicament delivery device, comprising:
• an external housing including a substantially rigid body;
• a moveable medicament container sled;
• a needle insertion mechanism;
• a fluid path operable to connect a needle of the needle insertion mechanism with a medicament container;
• a medicament container including a container body and plunger, wherein the medicament container is secured in a portion of the moveable container sled;
• and
• a drive mechanism;
• applying the device to a skin surface of a patient;
• activating the delivery device by substantially simultaneously:
• activating the needle insertion mechanism to cause the needle of the needle insertion mechanism to pierce the skin surface of the patient;
• and
• activating the drive mechanism to cause the drive mechanism to apply pressure to the plunger of the medicament container to cause the moveable medicament container sled to move, thereby advancing the medicament container and causing the medicament container to become fluidly connected with the fluid path.