Cardiac lead with optimized torque transmission properties

The cardiac lead body, composed of polymer materials with defined hardness and modulus, addresses implantation difficulties by enhancing flexibility and torque transmission, facilitating precise placement within the heart.

WO2026114961A1PCT designated stage Publication Date: 2026-06-04SORIN CRM
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Patent Information

Authority / Receiving Office
WO ยท WO
Patent Type
Applications
Current Assignee / Owner
SORIN CRM
Filing Date
2025-11-26
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Cardiac probes face challenges in implantation due to their significant flexibility, which complicates the screwing motion required for precise placement within the heart.

Method used

The cardiac lead body is designed with a specific combination of polymer materials having a Shore hardness between 75A and 65D and a flexural modulus between 1300 and 26000 Psi, allowing for both flexibility and effective torque transmission, facilitating implantation.

Benefits of technology

The design provides enhanced flexibility and torque transmission properties, enabling easier and more precise implantation of cardiac leads by allowing the distal end to be screwed in during implantation.

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Abstract

The present invention relates to a cardiac lead body having optimized torque (torsion) transmission properties by virtue of a choice of one or more materials having a specific combination of hardness and flexural modulus. The invention also relates to the lead comprising such a lead body, and to the use of a polymer material having a specific hardness and flexural modulus for the manufacture of a structural element of an implantable cardiac lead body. The implantable cardiac lead body (1) has a proximal end, a distal end and an outer transverse diameter less than or equal to 2.5 mm, preferably less than 1.7 mm, the lead body comprising predominantly by weight at least one polymer material as a structural matrix (2), the at least one polymer material having a Shore hardness of between 75A and 65D, preferably between 85A and 60D, as measured according to ASTM D2240 or ISO 48-4, and a flexural modulus of between 1300 and 26000 psi, preferably between 10000 and 20000 psi.
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Citation Information

Patent Citations

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