Methods and apparatus for selectively occluding the lumen of a needle

A device for parenterally transferring fluid to or from a patient, the device comprising:

• a housing that defines a fluid flow path, the housing configured to be coupleable to a fluid reservoir;
• a needle having a distal end portion, a proximal end portion, and defining a lumen therebetween, the distal end portion having a closed distal end and defining a port that includes a plurality of openings in fluid communication with the lumen, the distal end portion having a distal surface and configured for insertion into the patient, the proximal end portion configured to be fluidically coupleable to the fluid flow path;
• and
• an occlusion mechanism operable to selectively control fluid flow between the needle and the fluid flow path, the occlusion mechanism configured to be moved between a first configuration such that the lumen of the needle is obstructed during insertion into the patient, and a second configuration such that the lumen of the needle is unobstructed after the needle has been inserted into the patient allowing fluid transfer to or from the patient,
• the occlusion mechanism includes an occlusion member movably disposed about the needle and configured to be rotated from a first rotational position to a second rotational position to place the occlusion mechanism in the second configuration, the occlusion member having a proximal most surface defining a proximal opening and a distal most surface defining a distal opening, the occlusion member defining a lumen entirely enclosed by the occlusion member between the proximal opening and the distal opening and configured to receive at least a portion of the needle, the occlusion member occluding the port defined by the needle when the occlusion member is in the first rotational position, the port defined by the needle being unobstructed when the occlusion member is in the second rotational position.

A device for parenterally transferring fluid to or from a patient, the device comprising:

• a housing that defines a fluid flow path, the housing configured to be coupleable to a fluid reservoir;
• a needle having a distal end portion, a proximal end portion, and defining a lumen therebetween, the distal end portion having a surface circumscribing and defining a recessed portion and defining at least one opening, the at least one opening being in fluid communication with the lumen and being fluidically isolated from the recessed portion, the distal end portion of the needle configured for insertion into the patient such that the recessed portion receives at least one of tissue, bodily-fluid, or contaminants during the insertion, the proximal end portion configured to be fluidically coupleable to the fluid flow path;
• and
• an occlusion mechanism operable to selectively control fluid flow between the needle and the fluid flow path, the occlusion mechanism configured to be moved between a first configuration such that the lumen of the needle is obstructed during insertion into the patient, and a second configuration such that the lumen of the needle is substantially unobstructed after the needle has been inserted into the patient allowing fluid transfer to or from the patient,
• the occlusion mechanism including an occlusion member movably disposed about the needle, the occlusion member defining at least one opening, the at least one opening defined by the occlusion member being fluidically isolated from the at least one opening defined by the needle and the recessed portion of the needle being disposed, at least partially, in a distal position relative to the occlusion member when the occlusion mechanism is in the first configuration, the at least one opening defined by the occlusion member being in fluid communication with the at least one opening defined by the needle and the recessed portion of the needle being disposed entirely within the occlusion member when the occlusion mechanism is in the second configuration.

A device for parenterally transferring fluid to or from a patient, the device comprising:

• a housing that defines a fluid flow path, the housing configured to be coupleable to a fluid reservoir;
• a needle having a distal end portion, a proximal end portion, and defining a lumen therebetween, the distal end portion having a distal surface and configured for insertion into the patient, the distal end portion of the needle defining a recessed portion fluidically isolated from the needle lumen and configured to receive at least one of tissue, bodily fluid, and contaminants upon insertion of the needle into the patient, the proximal end portion configured to be fluidically coupleable to the fluid flow path;
• and
• an occlusion mechanism operable to selectively control fluid flow between the needle and the fluid flow path, the occlusion mechanism configured to be moved between a first configuration such that the lumen of the needle is obstructed during insertion into the patient, and a second configuration such that the lumen of the needle is unobstructed after the needle has been inserted into the patient allowing fluid transfer to or from the patient,
• the occlusion mechanism includes an occlusion member movably disposed about the needle and configured to be rotated from a first rotational position to a second rotational position to place the occlusion mechanism in the second configuration, the occlusion member having a proximal most surface defining a proximal opening and a distal most surface defining a distal opening, the occlusion member defining a lumen entirely enclosed by the occlusion member between the proximal opening and the distal opening and configured to receive at least a portion of the needle, the occlusion member occluding a port defined by the needle when the occlusion member is in the first rotational position, the port defined by the needle being unobstructed when the occlusion member is in the second rotational position.