System and method for safety syringe

A system for serially injecting liquids, comprising:

• a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
• a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
• a first liquid in the distal chamber;
• a second liquid in the proximal chamber;
• a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body;
• and
• a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
• a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
• a hub, and
• a connector fluidly coupled to the transfer pipe distal end,
• wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
• wherein the transfer pipe defines a transfer pipe interior, a distal end opening at the transfer pipe distal end, a middle opening, and a proximal opening, wherein the distal end opening, the middle opening, and the proximal opening are fluidly coupled through the transfer pipe interior,
• wherein the system has
• a first injection configuration wherein the proximal opening is disposed in the distal chamber, and
• a second injection configuration wherein the proximal opening is disposed in the proximal chamber, thereby allowing transfer of the second liquid from the proximal chamber, through the proximal opening and the transfer pipe interior, and out the distal end opening,
• wherein the distal stopper member obstructs the middle opening when the system is in the second injection configuration.

A system for serially injecting liquids, comprising:

• a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
• a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
• a first liquid in the distal chamber;
• a second liquid in the proximal chamber;
• a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body;
• and
• a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
• a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
• a hub, and
• a connector fluidly coupled to the transfer pipe distal end,
• wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
• wherein the distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, and
• wherein the detent is configured such that a resistance to the transfer pipe proximal end passing through the detent is overcome by about 2 lbs. to about 5 lbs. of distally directed force applied to the plunger member.

A system for serially injecting liquids, comprising:

• a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
• a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
• a first liquid in the distal chamber;
• a second liquid in the proximal chamber;
• a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body;
• and
• a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
• a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
• a hub, and
• a connector fluidly coupled to the transfer pipe distal end,
• wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
• wherein the distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, and
• wherein the detent comprises a bent wire.

A system for serially injecting liquids, comprising:

• a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
• a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
• a first liquid in the distal chamber;
• a second liquid in the proximal chamber;
• a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body;
• and
• a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
• a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
• a hub, and
• a connector fluidly coupled to the transfer pipe distal end,
• wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
• wherein the distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, and
• wherein the detent comprises an annealed stainless alloy.

A system for serially injecting liquids, comprising:

• a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
• a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
• a first liquid in the distal chamber;
• a second liquid in the proximal chamber;
• a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body;
• and
• a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
• a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
• a hub, and
• a connector fluidly coupled to the transfer pipe distal end,
• wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
• wherein the distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, and
• wherein the transfer pipe proximal end comprises a transfer pipe proximal end feature having an angle of about 30 degrees.