Devices, systems, and methods for delivering gas

A method for preparing an injector device, comprising:

• providing a barrel comprising a proximal end, an enclosed distal end including an outlet and a gas chamber communicating with the outlet;
• a plunger slidably received within the barrel comprising a piston within the barrel adjacent the distal end;
• a gas canister filled with gas;
• a handle on the proximal end of the syringe body;
• and a drive actuator;
• and
• actuating the drive actuator to cause an opener pin to open a septum of the gas canister and release the gas from the canister, whereupon the gas travels through the piston into the gas chamber, thereby displacing the piston proximally to fill the gas chamber with the gas;
• delivering gas into a patient's body that includes providing a barrel comprising a proximal end, an enclosed distal end including an outlet and a gas chamber communicating with the outlet, a plunger slidably received within the barrel comprising a piston within the barrel adjacent the distal end, a gas canister filled with gas, a handle extending from the proximal end of the syringe body, and a drive actuator;
• actuating the drive actuator to cause an opener pin to open a septum of the gas canister and release the gas from the canister, whereupon the gas travels through the piston into the gas chamber, thereby displacing the piston proximally to fill the gas chamber with the gas;
• introducing a tip of a cannula or needle communicating with the outlet into the patient's body;
• and advancing the plunger to deliver the gas within the gas chamber through the outlet into the patient's body.

A method for delivering gas into a patient's body, comprising:

• providing a barrel comprising a proximal end, an enclosed distal end including an outlet and a gas chamber communicating with the outlet, a plunger slidably received within the barrel comprising a piston within the barrel adjacent the distal end, a gas canister filled with gas, a handle extending from the proximal end of the syringe body, and a drive actuator;
• actuating the drive actuator to cause an opener pin to open a septum of the gas canister and release the gas from the canister, whereupon the gas travels through the piston into the gas chamber, thereby displacing the piston proximally to fill the gas chamber with the gas;
• introducing a tip of a cannula or needle communicating with the outlet into the patient's body;
• and
• advancing the plunger to deliver the gas within the gas chamber through the outlet into the patient's body.