# US 10,765,447 B2 · Methods and devices for diastolic assist > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,765,447 B2 - Document ID: US10765447B2 - Status: Granted - Kind: B2 - Application number: 15/085,509 - Filed: 2016-03-30 - Published: 2016-07-21 - Granted: 2020-09-08 - Earliest claimed: 2013-09-30 - Assignees: Cordynamix, Inc. - Applicants: Cordynamix, Inc. - Inventors: Michael D. Laufer; Freddy Abnousi - Web page: https://patentgrep.com/patent/US10765447B2 ## CPC - A61B 17/320783: {through side-hole, e.g. sliding or rotating cutter inside catheter} - A61B 17/320016: {Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes (A61B10/0233, A61B17/29, A61B17/3207 take precedence)} - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 17/3209: Incision instruments - A61B 2017/00243: {cardiac} - A61B 2017/00247: {Making holes in the wall of the heart, e.g. laser Myocardial revascularization} - A61B 2018/00184: {Moving parts} - A61B 2018/00357: {Endocardium} - A61B 2018/00595: {Cauterization} - A61B 2018/00601: {Cutting} - A61B 2018/1412: {Blade} - A61B 2018/1475: {Electrodes retractable in or deployable from a housing} - A61B 2090/064: {for measuring force, pressure or mechanical tension} - A61N 1/056: {Transvascular endocardial electrode systems} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract The devices and method described herein allow for therapeutic damage to increase volume in these hyperdynamic hearts to allow improved physiology and ventricular filling and to reduce diastolic filling pressure by making the ventricle less stiff. ## Claims ### Claim 1 A medical device for creating elongated incisions within soft tissue, the device comprising: a handle comprising a handle body and an actuating member; a shaft assembly comprising a flexible shaft having a near end coupled to the handle body and a far end, the flexible shaft having an axis, the shaft assembly configured to deflect a distal portion of the flexible shaft in a first direction away from the axis; a cutting member pivotally secured within the distal portion of the flexible shaft and having a cutting edge; a linking member nonparallel to the axis and coupling the actuating member of the handle to the cutting member such that when the linking member is maintained in tension, the cutting member pivots towards the first direction to remain outside of the distal portion of the flexible shaft and simultaneously urges the distal portion in the first direction wherein the cutting member pivots about a pivot point that does not move axially relative to the shaft assembly; and wherein the shaft assembly is configured to cause deflection of the distal portion of the flexible shaft independently of the actuating member and the linking member. ### Claim 2 (depends on 1) The medical device of claim 1, where the linking member is offset from a pivot point of the cutting member. ### Claim 3 (depends on 1) The medical device of claim 1, where the cutting member comprises an electrically non-conductive material. ### Claim 4 (depends on 3) The medical device of claim 3, further comprising at least one electrode located on the electrically non-conductive material, where the at least one electrode is electrically coupleable to a source of electrical current. ### Claim 5 (depends on 1) The medical device of claim 1, where the cutting member comprises an electrically conductive material and where the cutting member is electrically coupleable to a source of electrical current. ### Claim 6 (depends on 1) The medical device of claim 1, further comprising an opening adjacent to the far end of the flexible shaft, where the cutting edge of the cutting member extends through the opening when pivoted. ### Claim 7 (depends on 6) The medical device of claim 6, further comprising a channel extending between the near end of the flexible shaft through the opening. ### Claim 8 (depends on 6) The medical device of claim 6, further comprising a sheath being slidably located on the flexible shaft, where the sheath can be advanced to cover the opening and retracted to expose the opening. ### Claim 9 (depends on 6) The medical device of claim 6, further comprising an electrode adjacent to the opening. ### Claim 10 (depends on 1) The medical device of claim 1, further comprising a rigid section at the far end of the flexible shaft where the rigid section comprises an opening through which the cutting edge of the cutting member extends when pivoted. ### Claim 11 (depends on 10) The medical device of claim 10, where the rigid section comprises a conductive material and is coupleable to a source of current. ### Claim 12 (depends on 10) The medical device of claim 10, where the rigid section comprises a metal enclosure. ### Claim 13 (depends on 10) The medical device of claim 10, where the cutting member is in the rigid section and configured to pivot. ### Claim 14 (depends on 1) The medical device of claim 1, further comprising a strain measurement device coupled to the linking member. ### Claim 15 (depends on 1) The medical device of claim 1, wherein the linking member is offset from an axis of the flexible shaft to assist in biasing the far end of the flexible shaft upon application of the tensile force. ### Claim 16 (depends on 1) The medical device of claim 1, further comprising an atraumatic tip located at the far end of the flexible shaft. ### Claim 17 (depends on 16) The medical device of claim 16, where the atraumatic tip comprises a curved elastic member. ### Claim 18 (depends on 16) The medical device of claim 16, where the atraumatic tip is radiopaque. ### Claim 19 (depends on 1) The medical device of claim 1, where the cutting member is releasably fixable upon pivoting to the lateral side such that the cutting member is adjustable between a range of angles relative to the flexible shaft, where the range of angles can be varied to adjust a cutting depth in the soft tissue. ### Claim 20 (depends on 19) The medical device of claim 19, further comprising a stope coupled to the linking member, where the stop limits pivoting of the cutting member. ### Claim 21 (depends on 1) The medical device of claim 1, where the flexible shaft further includes a braid such that to improve rotational stiffness of the flexible shaft. ### Claim 22 (depends on 1) The medical device of claim 1, where the flexible shaft further includes a guidewire lumen. ### Claim 23 (depends on 1) The medical device of claim 1 where the flexible shaft is preshaped to cause deflection of the distal portion of the flexible shaft. ### Claim 24 (depends on 1) The medical device of claim 1 where the shaft assembly includes a preshaped guiding catheter configured to deflect the distal portion of the flexible shaft. ### Claim 25 (depends on 1) A kit comprising the medical device of claim 1 and one or more user shapeable guiding catheters.