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Method of using vasoconstrictive agents during energy-based tissue therapy

a technology of vasoconstrictive agents and energy-based tissue therapy, which is applied in the direction of biocide, plant growth regulators, surgical instruments for heating, etc., can solve the problems of increasing the concentration of purine nucleoside adenosine in the treated area, and reducing the size of the coagulation zone formed, so as to prevent or eliminate vasodilation and reduce the effect of vasodilation

Inactive Publication Date: 2007-09-06
COVIDIEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]The present disclosure further relates to a method of preventing or eliminating vasodilation during a radiofrequency procedure including, but not limited to the following step: administering to a patient in need thereof an amount of adenosine receptor antagonist effective in preventing or reducing vasodilation due to adenosine.

Problems solved by technology

Although energy-based therapies such as tissue ablation therapies and procedures have been successful in treating patients, these therapies and procedures are problematic in that they can lead to elevated concentrations of the purine nucleoside adenosine in treated areas.
Adenosine can be problematic and counterproductive to the energy-based therapy and / or overall treatment.
Vasodilation may be problematic during an energy-based therapy in that, among other things, it may reduce the size of the coagulation zone formed during an energy-based procedure.

Method used

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  • Method of using vasoconstrictive agents during energy-based tissue therapy

Examples

Experimental program
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Effect test

example i

[0057]A 65 year old female weighing 130 pounds with liver tumor is undergoing RF ablation of 5 cm tumor located in liver. During the RF ablation the patient is simultaneously administered adenosine receptor antagonist in an amount sufficient to, in vivo, block A1, A2, A3 adenosine receptors immediately adjacent to the tumor. The ablation step is performed by delivering electrical current of about 500 kHz between the electrode and a ground pad. Tissue is heated by, among other things, thermal conduction. The temperature of the tissue depends upon, among other things, thermal and electrical tissue properties, and blood perfusion. Her liver is a well perfused organ with perfusion rates of around 1 L / kg / min (with tumor having a lower perfusion rate). By blocking the adenosine receptors immediately adjacent to the tumor, local vasodilation adjacent to the tumor is prevented. The hyperemic rim is reduced and the coagulation zone increased in size compared to a similar procedure without ad...

example ii

[0058]A 60 year old male weighing 155 pounds with liver tumor is undergoing energy-based therapy of 6 cm tumor located in liver. During the energy-based therapy the patient is simultaneously administered at least one vasoconstrictive agent in an amount sufficient to reduce blood flow in and immediately adjacent to the tumor. The energy-based therapy is performed by delivering electrical current of about 500 kHz between the electrode and a ground pad. Tissue is heated by, among other things, thermal conduction. The temperature of the tissue depends upon, among other things, thermal and electrical tissue properties, and blood perfusion. His liver is a well perfused organ with perfusion rates of around 1 L / kg / min (with tumor having a lower perfusion rate). Vasodilation in and around the tumor is prevented. The hyperemic rim is reduced and the coagulation zone increased in size compared to a similar procedure without vasoconstrictive agent administered to the patient.

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Abstract

A mammal undergoing an energy-based therapy is treated by administering at least one vasoconstrictive agent to the mammal prior to or during the procedure. The at least one vasoconstrictive agent is added in amounts sufficient to reduce or prevent vasodilation. This treatment method increases or promotes the size of the coagulation zone created after energy-based therapy.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 11 / 367,909, filed on Mar. 3, 2006, and titled METHOD OF USING ADENOSINE RECEPTOR BLOCKERS DURING TISSUE ABLATION.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to application of vasoconstrictive agents for use during the energy-based tissue therapies or procedures and, more specifically, to a treatment regimen that prevents or alleviates symptoms associated with vasodilation.[0004]2. Background of the Related Art[0005]Energy-based tissue therapies such as ablation techniques are used clinically and in the operating room for therapeutic and surgical purposes. Such techniques eliminate tissue using energy sources such as laser, microwave, radiofrequency, high-intensity focused ultrasound, cryotherapy (such as freezing below −20 C), conductive heating, and the like. Although energy-based therapies such as tissue ablation therapies and proce...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K31/522A61K31/52
CPCA61K31/522A61K31/00A61B18/12A61B2018/00333A61B2018/00351A61B2018/00452A61B2018/00547A61B2018/00559A61B2018/00577A61B2018/00589A61B2018/00619A61B2018/0063A61K31/519A61K31/53A61P9/00
Inventor PODHAJSKY, RONALD J.
Owner COVIDIEN AG