Threaded syringe with quick stop

• US 20030055386A1
• Filed: 08/16/2002
• Published: 03/20/2003
• Est. Priority Date: 05/21/1999
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Micro Therapeutics, Inc. (Medtronic Plc)
• Inventors: Strauss, Brian M., Conner, Amanda, Hayman, Douglas R., Canfield, Brian, Olsen, Ed, Smith, Brock H.
• Granted Patent: US 7,018,365 B2
• Time in Patent Office: Days
• US Class Current: 604/224
• CPC Class Codes: A61K 49/0419 Microparticles, microbeads, microcapsules, microspheres, i.e. having a size or diameter higher or equal to 1 micrometer
• CPC Class Codes: A61K 9/0024 Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue compositions for intravenous administration, normal injectable solutions or dispersions for, e.g. subcutaneous administration A61K9/0019; brain implants A61K9/0085; (coated) prostheses, catheters or stents A61L
• CPC Class Codes: A61L 24/001 Use of materials characterised by their function or physical properties
• CPC Class Codes: A61L 24/046 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043 takes precedence
• CPC Class Codes: A61L 24/06 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043, A61L24/046 take precedence
• CPC Class Codes: A61L 24/08 Polysaccharides A61L24/043 takes precedence
• CPC Class Codes: A61L 2430/36 for embolization or occlusion, e.g. vaso-occlusive compositions or devices artificial blood vessels A61L27/507
• CPC Class Codes: A61M 2005/3139 Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 5/31566 Means improving security or handling thereof
• CPC Class Codes: A61M 5/31586 performed by rotationally moving or pivoted actuator, e.g. an injection lever or handle
• CPC Class Codes: C08J 3/091 characterised by the chemical constitution of the organic liquid
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Abstract

A threaded syringe provides a mechanism by which a clinician can deliver a viscous fluid through a relatively small lumen and can obtain tactile or audible feedback of delivery. The threaded syringe allows for delivery of more viscous fluids with less force and/or allows for more controlled delivery. The syringe includes a syringe barrel and a sliding member positioned on the proximal end of the syringe barrel. The sliding member has a first threaded hole and a second hole. The sliding member is slidable on the syringe barrel between a first position at which the first threaded hole is aligned with the syringe barrel for precise delivery of a material from the syringe and a second position at which the second hole is aligned with the syringe barrel for filling of the syringe or to stop bleed out.

Claims

1. A syringe comprising:

a syringe barrel having a distal delivery orifice and a proximal end;

a sliding member positioned on the proximal end of the syringe barrel, the sliding member having a first threaded hole and a second hole and being slidable on the syringe barrel between a first position at which the first threaded hole is aligned with the syringe barrel and a second position at which the second hole is aligned with the syringe barrel; and

a threaded plunger for delivery of a fluid from the syringe barrel through the delivery orifice.

2. The syringe of claim 1, wherein the sliding member is slidable from the first position to the second position with respect to the threaded plunger to release pressure on a material in the syringe and stop delivery of the material from the syringe.

3. The syringe of claim 1, wherein the sliding member in the second position allows the threaded plunger to move longitudinally in the syringe barrel without rotation.

4. The syringe of claim 3, wherein the sliding member in the first position allows the threaded plunger to move longitudinally in the syringe barrel in a precisely controllable manner by rotation of the threaded plunger.

5. The syringe of claim 1 in combination with a catheter for delivery of a material in the syringe into the vascular system.

6. The combination of claim 5, further comprising a liquid embolic composition contained in the syringe for delivery to the vascular system.

7. A method for embolizing a vascular site comprising:

positioning the distal end of a delivery catheter in said vascular site;

connecting a threaded syringe containing a liquid embolic composition to a distal end of the delivery catheter;

rotating a plunger of the threaded syringe to inject the liquid embolic composition to the vascular site in a precisely controllable manner; and

releasing pressure on the liquid embolic composition by disengaging threads of the plunger from a barrel of the syringe.

8. The method of claim 7, wherein the pressure is released by moving a sliding member on the barrel of the syringe.

9. The method of claim 7, wherein the threads of the plunger are released and re-engaged with the barrel of the syringe repeatedly to deliver and stop delivery of the liquid embolic composition.

10. A syringe comprising:

a syringe barrel having a distal delivery orifice and a proximal end;

an internally threaded member at the proximal end of the syringe barrel;

a threaded plunger receivable in the internally threaded member for delivery of a fluid from the syringe barrel through the delivery orifice, the threaded plunger having a longitudinal groove; and

a spring element for engaging the longitudinal groove to provide a tactile or audible indication of fluid delivery.

11. The syringe of claim 10, wherein the spring element is a spring clip mounted on the internally threaded member and surrounding the threaded plunger.

12. The syringe of claim 10, wherein the spring element is mounted in the internally threaded member.