Injection devices and systems and methods for using them
AssigneeClph, LLC
InventorsStephen A. Leeflang, Christian S. Eversull
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for injecting one or more agents into tissue within a patient's body. In one embodiment, an injection device is provided that includes an outer tubular member comprising a proximal end, a distal end sized for introduction into a patient's body, and a lumen extending between the proximal and distal ends; a relatively small cross-section needle tip extending distally beyond the distal end,; and an internal pressure release member slidably disposed within the lumen between a distal position and a proximal position to prevent viscous injectate from expressing from the distal tip.
Claims22
A device for injecting a viscous injectate into tissue within a patient's body, comprising:
- an outer member comprising a proximal end, a distal end sized for introduction into a patient's body, and a lumen extending between the proximal and distal ends;
- a needle tip extending distally beyond the distal end to a distal tip and including a passage communicating between the lumen and an outlet in the distal tip;
- a handle on the proximal end including a port communicating with the lumen and connectable to a source of viscous injectate for delivering the injectate through the port, lumen, and passage and out the outlet;
- and
- an inner member slidably disposed within the lumen, the inner member comprising a proximal end disposed adjacent the outer member proximal end and a distal end disposed within the lumen, the inner member having an outer profile smaller than inner profile of the lumen such that the injectate passes through the lumen around the inner member, the inner member movable from a distal position wherein the inner member distal end is disposed adjacent the passage during delivery of the injectate and a proximal position in which the inner member distal end is directed proximally away from the passage after delivery of the injectate to prevent the injectate from expressing from the distal tip.
A system for injecting a viscous injectate into tissue within a patient's body, comprising:
- an outer member comprising a proximal end, a distal end sized for introduction into a patient's body, and a lumen extending between the proximal and distal ends;
- a needle tip extending distally beyond the distal end to a distal tip, the needle tip having a cross-section smaller than the distal end and a passage communicating between the lumen and an outlet in the distal tip;
- a source of viscous injectate coupled to the proximal end and communicating with the lumen for delivering the injectate through the lumen and passage and out the outlet;
- and
- an inner member slidably disposed within the lumen, the inner member comprising a proximal end disposed adjacent the outer member proximal end and a distal end disposed within the lumen, the inner member having an outer profile smaller than inner profile of the lumen such that the injectate passes through the lumen around the inner member, the inner member movable from a distal position wherein the inner member distal end is disposed adjacent the passage during delivery of the injectate and a proximal position in which the inner member distal end is directed proximally away from the passage after delivery of the injectate to prevent the injectate from expressing from the distal tip.
20-22. (canceled)
A method for delivering viscous injectate into tissue within a patient's body using an injection device comprising an outer member including a proximal end, a distal end, and a lumen extending therebetween, a needle tip extending from the distal end, and a pressure release member slidably disposed within the lumen, the method comprising:
- introducing the distal end of the elongate member into a body lumen adjacent a target injection site;
- inserting the needle tip into tissue at the target injection site;
- with a distal end of the pressure release member disposed adjacent the needle tip within the lumen, delivering injectate from a source through the lumen around the pressure release member and through the needle tip into the tissue;
- and
- after delivering the injectate, withdrawing the pressure release member proximally such that the pressure release member distal end moves proximally away from the passage to prevent injectate from expressing out the needle tip.
24-28. (canceled)
Dependencies are inferred from the claim text.