Surgical method and system for performing the same
Inventors
Assignees
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Publication Number
US-11957335-B2
Publication Date
2024-04-16
Expiration Date
Abstract
A system using a guide to assist in insertion of a helicoidal member in a target biological tissue. The system adheres to tissues using suction to allow insertion of the helicoidal member.
Core Innovation
The invention provides a method of repairing biological tissue using a guide having a cooling surface that is cooled to a predetermined temperature. The cooling surface abuts a tissue surface, and the predetermined temperature is low enough to cause adhesion between the cooling surface and the tissue surface. With the guide remaining substantially fixed relative to the tissue surface, a helicoidal member is advanced into the biological tissue over the guide.
After the helicoidal member has been advanced into the biological tissue, the cooling of the cooling surface is reversed to release the cooling surface from the tissue surface. The guide is then removed from the tissue surface after the cooling surface is released. This sequence enables controlled advancement of the helicoidal member while immobilizing the guide by cryoadhesion.
In one disclosed approach, a catheter is positioned adjacent a first tissue surface to abut the guide cooling surface against that first tissue surface. The cooling, advancing, releasing, and removing steps are performed for a first helicoidal member, after which the guide is repositioned to a second tissue surface, cooled again to cause adhesion, and a second helicoidal member is advanced.
Claims Coverage
The consolidated content provides two independent claims covering cryoadhesion of a guide cooling surface to a tissue surface to enable advancement of a helicoidal member with the guide substantially fixed, followed by release by reversing cooling. The second claim extends this to catheter-based repositioning and sequential advancement at a second tissue surface.
Guide cooling-surface cryoadhesion for immobilized helicoidal advancement
Abutting at least a portion of a cooling surface of a guide against a tissue surface; cooling the cooling surface to a predetermined temperature low enough to cause adhesion; advancing a helicoidal member into the biological tissue over the guide while the guide remains substantially fixed relative to the tissue surface; reversing the cooling to release the cooling surface; and removing the guide after the cooling surface is released and the helicoidal member has been advanced.
Catheter-based repositioning cryoadhesion for sequential helicoidal repair
Positioning a catheter adjacent a first tissue surface; abutting a guide cooling surface against the first tissue surface; cooling to a predetermined temperature low enough to cause adhesion; advancing a helicoidal member into the biological tissue over the guide with the guide remaining substantially fixed; reversing cooling to release the cooling surface; repositioning the guide to a second tissue surface; cooling at least part of the repositioned guide to cause adhesion; advancing a second helicoidal member with the guide remaining substantially fixed; reversing cooling to release the cooling surface from the second tissue surface; and removing the guide after the cooling surface has been released.
The main coverage is cryoadhesion of the guide cooling surface to a tissue surface for advancing a helicoidal member while the guide remains substantially fixed, followed by release by reversing the cooling. A further claim extends this to catheter-based, sequential repair by repositioning the guide and advancing a second helicoidal member.
Stated Advantages
Documented Applications
Annuloplasty for a mitral valve annulus section by implanting helicoids around the annulus and tightening to reduce a valve orifice size.
Repair of biological tissue using catheter-based and sequential tissue-surface treatment with repositioning of the guide.
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