A low-temperature adjustable myocardial diagnostic and therapeutic integrated cryoablation / dissection system

The cryoablation/excision system for myocardial diagnosis and treatment, which combines cryogenic freezing and excision techniques, solves the problems of sampling success rate and safety in myocardial biopsy and cryoablation, and achieves accurate sampling and safe ablation of myocardial tissue.

CN117179880BActive Publication Date: 2026-07-17FOURTH MILITARY MEDICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FOURTH MILITARY MEDICAL UNIVERSITY
Filing Date
2023-09-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Current myocardial biopsy methods suffer from poor sampling success rates, low diagnostic accuracy, and a tendency to cause irreversible conduction bundle damage. In particular, during cardiac cryoablation, the ablation range cannot be precisely controlled, leading to complications such as conduction block and malignant arrhythmias.

Method used

The system employs a low-temperature adjustable myocardial diagnostic and therapeutic cryoablation/dissection system, which combines low-temperature refrigerant gas freezing fixation with an adjustable dissection method. Through cryoablation needles, puncture needles, and a refrigerant device, it achieves precise sampling and safe ablation of myocardial tissue.

Benefits of technology

This method achieves high precision and safety in myocardial biopsy, reduces conduction bundle damage and complications, ensures the safety and precision of cryoablation, and avoids problems such as perforation and bleeding in traditional methods.

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Abstract

This invention discloses a low-temperature adjustable cryoablation / dissection system for myocardial diagnosis and treatment, comprising a cryoablation needle, a puncture needle fitted onto the tip of the cryoablation needle, and a refrigerant device connected to the cryoablation needle. This invention utilizes low-temperature refrigerant gas to freeze and fix the target area of ​​the lesion without causing irreversible damage to myocardial cells and conduction bundles. It achieves more effective tissue sampling after freezing and fixing hypertrophic loose myocardial tissue / liquefied necrotic tissue in the center of cardiac tumors. The dissection needle adopts a helical radial dissection sampling structure, avoiding complications such as perforation and bleeding of the myocardium caused by a spring-loaded structure, while also providing higher cutting efficiency for hard calcifications / fibrous tissue. The dissection biopsy needle is equipped with a coaxial sheath, reducing myocardial damage and complications caused by multiple punctures during sampling, and further avoiding needle tract implantation of tumor tissue. This improves the accuracy and safety of myocardial tissue biopsy in all aspects.
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