Disposable infusion device

A disposable infusion device for subcutaneously delivering an infusable liquid to a body, comprising:

• a housing defining a bladder chamber;
• a bladder disposed in the bladder chamber and being compressed by the housing for expelling the infusable liquid contained therein;
• and
• a cannula insertable into the skin of the body for delivering the infusable liquid to the body;
• wherein the housing includes a microfluidic passageways that independently provide fluid communication between the cannula and the bladder.

An infusion device for delivering an infusable liquid to a body, comprising:

• a housing compressing a bladder to create a pressurized bladder, the bladder being pressurized upon filling he bladder with the infusable liquid;
• an injection needle for inserting a cannula into the body, the cannula for subcutaneously delivering the infusable liquid to the body;
• microfluidic passageways in the housing that each provide fluid communication between the cannula and the bladder;
• and
• a control system for opening each of the passageways and controlling the amount of infusable liquid delivered to the body.

A method for delivering an infusable liquid to a body with an infusion device, the device having a housing defining a bladder chamber and a bladder disposed therein, the bladder containing the infusable liquid therein, comprising:

• connecting the bladder to a cannula through a plurality of passageways;
• compressing the bladder to create a pressurized bladder[, the bladder being compressed by the housing upon filling the bladder with the infusable liquid];
• attaching the housing to the body;
• and
• inserting the cannula into the body;
• and
• subcutaneously delivering the infusable liquid to the body by opening at least one of the passageways.

A method of delivering an infusable liquid to a body, comprising:

• compressing a bladder to create a pressurized bladder, the bladder being disposed within a housing of an infusion device, the housing compressing the bladder upon filling the bladder with the infusable liquid;
• inserting a cannula into the body, the cannula connected to the bladder through a plurality of passageways and subcutaneously delivering the infusable liquid to the body when in fluid communication with the pressurized bladder;
• providing fluid communication between the cannula and the bladder by opening at least one of the passageways during delivery of the infusable liquid;
• and
• controlling the amount of infusable liquid delivered to the body by varying dimensions of the passageways.

An infusion device, comprising:

• a bladder;
• a cannula for insertion into a body;
• and
• a plurality of passageways extending between the bladder and the cannula,
• wherein each passageway includes a switch for opening the passageway and providing fluid communication through the passageway and between the cannula and the bladder.