System and method for implant delivery

• US 10,492,938 B2
• Filed: 08/11/2016
• Issued: 12/03/2019
• Est. Priority Date: 08/11/2015
• Status: Active Grant

• Current Assignee: Terumo Corporation
• Original Assignee: Terumo Corporation
• Inventors: Lam, Cang
• Primary Examiner(s): Orkin, Alexander J
• Application Number:
  US15/234,906
• Publication Number:
  US 20170042548A1
• Time in Patent Office: 1,209 Days
• CPC Class Codes: A61B 17/1204 temporary occlusion
• CPC Class Codes: A61B 2017/00336 with a protective sleeve, e.g. retractable or slidable
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

An implant delivery system is described. The implant delivery system utilizes an implant, implant wire, delivery sheath, and a torque device. The torque device may include a cutting element to slit the delivery sheath and a clamp device to fix the position of the implant delivery wire.

Claims

1. An implant delivery system comprising:

an implant configured for providing medical treatment inside a human body and being operatively connected to an elongated implant wire;

a sheath having a lumen, the implant and the elongated implant wire being sized for deployment through the sheath;

a torque device comprising;

a torque body having an indented section and a non-indented section;

a mating piece that removably connects to and mates with the torque body;

a first passage extending through the torque device, the first passage comprising recessed areas in the indented section of the torque body and recessed areas in the mating piece that align with each other, the first passage continuing through the non-indented section of the torque body;

a separator passage member removably located within the first passage and allowing passage of the elongated implant wire;

the separator passage member comprising a tube and a cutting element that is fixed to the tube and positioned proximally of a distal end of the tube;

the separator passage member having a distal end located at a location proximal of the first passage distal opening;

a second passage connecting to the first passage near the cutting element, the second passage extending away from the first passage, the second passage comprising recessed areas in the indented section of the torque body and recessed areas in the mating piece that mate with each other;

a clamp mechanism which selectively presses against the elongated implant wire;

the cutting element is positioned in the first passage in between the torque body and the mating piece to slit a sheath passing through the first passage, wherein the torque device directs the slit sheath into the second passage while leaving the implant in place.

2. The implant delivery system of claim 1 wherein the torque device has a proximal end and a distal end, and a longitudinal axis extending therebetween;

and wherein an external opening of the second passage is perpendicular to the longitudinal axis of the torque body.

3. The implant delivery system of claim 2, wherein the separator passage member has a distal end located proximally of a distal end of the first passage.

4. The implant delivery system of claim 2 wherein the body member and the mating piece both include recesses which form the second passage.

5. The implant delivery system of claim 2 wherein the body member and the mating piece both have apertures which align to facilitating connection between the body member and the mating piece.

6. The implant delivery system of claim 1 wherein the medical implant is an embolic protection device.

7. A method of delivering an implant comprising:

locking a clamp mechanism on a torque device to an elongated implant wire;

a distal end of the implant wire being operatively connected to an implant configured for providing medical treatment inside a human body;

proximally withdrawing a sheath through the torque device;

the sheath being at least partially disposed over the elongated implant wire;

the sheath first passing through a distal opening of the torque device and into a first passage, and then passing over an outside of a separator passage member;

the separator passage member being removably located in the torque device, and comprising a tube and a cutting element that is connected to the tube and positioned proximally of a distal end of the tube;

creating a longitudinal slit portion in the sheath with the torque device; and

,

separating the longitudinal slit portion of the sheath from the elongated implant wire, wherein the sheath is directed from said first passage to a second passage that is directed away from the elongated implant wire;

the second passage having an external opening aligned along a side of the torque device;

wherein the torque device comprises a torque body with a proximal portion and a distal portion that has a cut-away shape relative to the proximal portion and wherein a mating piece mates with the distal portion to form the first passage and the second passage; and

wherein the first passage is further formed from a unitary region in the proximal portion of the torque body.

8. The method of claim 7, wherein the locking a clamp mechanism further comprises screwing a screw member of the clamp mechanism on to a collet of the clamp mechanism.

9. The method of claim 7, wherein the creating a longitudinal slit portion further comprises passing the sheath over a cutting element in the torque device.

10. The method of claim 7, wherein the proximally withdrawing the sheath further comprises expanding the implant within a patient.