US 10,869,709 B2 · Cryosurgery system

Abstract

A cryosurgery system for application of medical-grade liquid nitrogen to a treatment area via a small, low pressure, open tipped catheter. The system includes a console, including a touch panel computer, a cryogen module, a suction module and an electronics module, and a disposable spray kit. Features include optional low cryogen flow setting to reduce the cryogen flow rate by 50%, improved cryogen flow consistency reducing pressure pulses and peaks, an integrated suction pump for improved consistency and self-checks, specified vent tube areas and corresponding maximum expected pressures during cryospray procedure; optional pressure sensing capability to monitor pressure during a treatment, and novel catheter designs of multilayer and flexible construction providing a variety of spray patterns.

Claims20

Dependent claims

An apparatus for cryogen spray treatment, comprising:

a tank and a pressure maintenance system, wherein cryogen is stored in the tank under pressure and the maintenance system controls pressure of the cryogen while in the tank and during delivery to a patient;
a delivery catheter communicating with the tank for delivery of cryogen spray to the patient during the treatment;
a pre-cool system configured to pre-cool at least a portion of the apparatus prior to or after the cryogen spray treatment, or both;
and
an on-board control system and user interface, comprising a non-transitory computer readable medium containing executable computer readable instructions for one or both of user-programmed and user-direct monitoring and control of the pressure maintenance system, the catheter, and the pre-cool system.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/793,357Filed 25 Oct 2017 · continuation

Priority

2 Mar 2012

Published

US 2018/0042655 A115 Feb 2018

Granted

22 Dec 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

A61B 18/0218
By cooling, e.g. cryogenic techniques: with open-end cryogenic probe, e.g. for spraying fluid directly on tissue or via a tissue-contacting porous tip
A61B 2018/00041
Cooling or heating of the probe or tissue immediately surrounding the probe: heating, e.g. defrosting
A61B 2018/00577
For achieving a particular surgical effect: ablation
A61B 2018/00714
Controlled or regulated parameters: temperature

Family

Application13/411,395Parent of this continuation-in-part · filed 2 Mar 2012

Application13/784,596Parent of this continuation · filed 4 Mar 2013

Application14/869,514Parent of this continuation · filed 29 Sep 2015

US 9,144,449 B2Parent of this continuation · filed 29 Sep 2015

US 9,301,796 B2Parent of this continuation-in-part · filed 5 Apr 2016

US 2018/0042655 A1Pre-grant publication · published 15 Feb 2018

US 9,820,797 B2Parent of this continuation

Application13/784,596Parent of this continuation-in-part

US 2013/0231651 A1Published application

US 2013/0253491 A1Published application

US 2017/0091976 A1Published application

US 9,811,937 B2Related patent

US 10,869,709 B2This patent

From the US filing history. Foreign family members aren’t listed.

Cryosurgery system

Life of this patent

Cryosurgery system

Life of this patent

Abstract

Claims20