JPWO2021083567A5

JPWO2021083567A5 -

Info

Publication number: JPWO2021083567A5
Application number: JP2022525525A
Authority: JP
Publication date: 2023-09-05

Claims

An introducer for introducing an electrosurgical instrument into a patient's body, comprising:
a tubular member defining a lumen through which the electrosurgical instrument is insertable;
a cooling assembly configured to remove heat from the tubular member;
with
wherein the cooling assembly includes a heat sink thermally coupled to the tubular member, the heat sink being formed of a thermally conductive material and having a higher heat capacity than the tubular member; Introducer.

The introducer of claim 1, wherein the heat sink is at or near the proximal end of the tubular member.

3. The introducer of claim 1 or claim 2, wherein the heat sink is provided within the handle of the tubular member.

4. The introducer of any one of claims 1-3, wherein the heat sink is thermally coupled to the tubular member via a heat pipe.

5. The introducer of any one of claims 1-4, wherein the cooling assembly is configured to actively cool the heat sink.

6. The introducer of Claim 5, wherein the cooling assembly includes a fan configured to actively cool the heat sink.

7. The introducer of claim 5 or claim 6, wherein the cooling assembly is configured to actively cool the heat sink with coolant fluid.

8. The introducer of any one of claims 5-7, wherein the cooling assembly includes a heat exchanger configured to actively cool the heat sink.

The introducer of any preceding claim , wherein the cooling assembly includes a heat pump configured to remove heat from the tubular member.

The tubular member includes one or more channels defined on or in a sidewall of the tubular member, and the cooling assembly is adapted to remove heat from the tubular member through the one channel. An introducer according to any preceding claim, configured to circulate coolant fluid through one or more channels.

one or more tubular members disposed within the lumen and arranged to press against an outer surface of the electrosurgical instrument when the electrosurgical instrument is inserted through the lumen; An introducer according to any one of claims 1-10 , comprising a contact element.

The introducer of any one of claims 1-11 , wherein the tubular member includes a distal end formed of a dielectric material.

The introducer of any one of claims 1-12 , wherein the tubular member includes a pointed distal end.

An introducer according to any preceding claim , wherein the tubular member includes an outer layer formed of a biocompatible material.

The introducer of any one of claims 1-14 , wherein the tubular member includes an inner layer formed of a thermally conductive material and an outer layer formed of a thermally insulating material.

An introducer according to any preceding claim, wherein a proximal portion of the tubular member is flexible and a distal portion of the tubular member is rigid.

The introducer of any one of claims 1-16 , wherein the tubular member has a length of 30 cm or more.

An electrosurgical system comprising:
An electrosurgical instrument,
Transmission lines for transporting microwave and/or radio frequency electromagnetic (EM) energy, and
a radiating tip attached to a distal end of the transmission line configured to receive and deliver the microwave and/or radio frequency EM energy to living tissue;
18. The introducer of any one of claims 1-17, wherein the electrosurgical instrument is insertable through the lumen of the tubular member;
The electrosurgical system, comprising:

A method of introducing an electrosurgical instrument into a patient's body, comprising:
inserting a tubular member of an introducer into the body of the patient;
inserting an electrosurgical instrument through the lumen of the tubular member such that the radiating tip of the electrosurgical instrument projects beyond the distal end of the tubular member; inserting;
removing heat from the tubular member using a cooling assembly of the introducer, the cooling assembly including a heat sink thermally coupled to the tubular member, the heat sink dissipating heat; said removing being formed of a conductive material and having a higher heat capacity than said tubular member;
The above method, comprising