Cold plate design in heat exchanger for intravascular temperature management catheter and/or heat exchange pad

Patent metadata

Field	Value
Publication number	US-2016287434-A1
Application number	US-201514675504-A
Country	US
Kind code	A1
Filing date	Mar 31, 2015
Priority date	Mar 31, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

Cold plates through which refrigerant flows define a slot between them that can receive a cassette through which sterile working fluid with a relatively low flow rate flows from an intravascular beat exchange catheter or external pad. The slot may have bulge cavities along the edges to permit the membrane of the cassette to expand and thus establish fluid supply and return passageways.

First claim

What is claimed is:

1 . An apparatus comprising;
a plate assembly having a cassette slot configured to receive a membrane assembly of a cassette, with the membrane assembly being configured for containing working fluid from an intravascular heat exchange catheter or heat exchange pad, the plate assembly also including rail receptacles straddling respective sides of the slot and configured for receiving respective side rails of the cassette, wherein at least a first bulge cavity formed inboard of a first one of the rail receptacles, the first bulge cavity having a width at its widest point that is greater than a width of the slot.

2 . The apparatus of claim 1 , comprising a second bulge cavity formed inboard of a second one of the rail receptacles, the second cavity having a width at its widest point that is greater than a width of the slot.

3 . The apparatus of claim 1 , wherein when the cassette is engaged with the apparatus with the membrane assembly disposed in the slot and the side rails of the cassette disposed In the rail receptacles, a first portion of the membrane assembly that is inboard of a side rail of the cassette can expand into the first bulge receptacle when the membrane assembly is filled with working fluid to thereby establish an enlarged fluid passageway along a vertical side edge of the membrane assembly.

4 . The apparatus of claim 1 , wherein the first bulge cavity extends substantially an entire length of the first rail receptacle.

5 . The apparatus of claim 1 , wherein the first bulge cavity is circular or semicircular-shaped.

6 . Apparatus comprising:
a plate assembly including:
a separator plate formed with a first channel on a first side of the separator plate and a second channel on a second side of the separator plate that is opposite the first side;
the first channel being configured for receiving refrigerant from a compressor therethrough and the second channel being -configured for receiving fluid from a patient heat exchange pad or from a source of fluid other than the pad;
a first backing plate abutting the first side of the separator plate;
a second backing plate abutting the second side of the separator plate; and
a cavity bordering the first backing plate opposite to the separator plate and configured for receiving a cassette configured for holding working fluid circulating through an intravascular heat exchange catheter.

7 . The apparatus of claim 6 , wherein the first and second backing plates abut the first and second sides of the separator plate along the entire first and second sides of the separator plate with only the first and second channels establishing cavities through which respective fluids may flow.

8 . The apparatus of claim 6 , wherein, at least the first channel is serpentine-shaped.

9 . The apparatus of claim 6 , wherein refrigerant in the first channel can exchange heat with fluid in a cassette disposed in the cavity.

10 . The apparatus of claim 6 , wherein refrigerant in the first channel can exchange heat across the separator plate with fluid in the second channel.

11 . The apparatus of claim 6 , wherein fluid in the second channel can exchange heat across the separator plate and the first backing plate with fluid in a cassette disposed In the cavity.

12 . The apparatus of claim 6 , wherein the separator plate is made of metal.

13 . The apparatus of claim 6 , wherein the separator plate is made of thermoplastic.

14 . The apparatus of claim 6 , wherein refrigerant flow through the first channel is established to maintain some liquid phase throughout traversal of refrigerant through the first channel.

15 . A heat exchange system to exchange heat with working fluid from an intravascular heat exchange catheter or from an external heat exchange pad, comprising:
at least one compressor configured to circulate refrigerant through the system to exchange heat with the working fluid; and at least one duct or tube configured for receiving exhaust heat from the compressor and. for directing the exhaust heat onto a patient.

16 . The system of claim 15 , wherein the system is to exchange heat with working fluid from an intravascular heat exchange catheter.

17 . The system of claim 15 , wherein the system is to exchange heat with working fluid an external heat exchange pad.

18 . The system of claim 15 , wherein the duct engages a tent disposed around the patient.

19 . A heat exchange system to-exchange heat with working fluid from an intravascular heat exchange catheter or from an external heat exchange pad, comprising:
a plate assembly having one or more channels configured for receiving refrigerant therethrough, wherein refrigerant flow through a channel is established or adjusted to maintain at least some liquid phase throughout traversal of refrigerant through the channel, wherein the refrigerant exchanges heat with working fluid from the intravascular heat exchange catheter and/or the external heat exchange pad.

20 . The system of claim 19 , wherein refrigerant flow through a channel is established or adjusted to maintain at least some liquid phase of the refrigerant throughout the entire period of time that the refrigerant flows or traverses through the channel.

21 . The apparatus of claim 1 , wherein the first and/or second bulge cavity has a width at its widest, point that is less than a width of the first or second rail receptacle but greater than a width of the slot.

22 . The apparatus of claim 1 , wherein a surface of the plate assembly configured to face a received cassette membrane is coated with a non-stick or hydrophobic coating to aid in the removal of the cassette after use.

23 . The apparatus of claim 11 , wherein the fluid is water received from a water reservoir or container.

24 . The system of claim 15 , wherein a surface of the plate assembly configured to face a received cassette membrane is coated with a non-stick or hydrophobic coating to aid in the removal of the cassette after use.

Assignees

• Zoll Circulation Inc

Inventors

• Dabrowiak Jeremy Thomas
• Pendry Craig Wendell
• Pistor Christoph Matthias

Classifications

• A61F7/02

  Compresses or poultices for effecting heating or cooling · CPC title

• A61F7/12 Primary

  Devices for heating or cooling internal body cavities · CPC title

• A61F2007/0056

  for cooling · CPC title

• A61F2007/126

  for invasive application, e.g. for introducing into blood vessels · CPC title

• A61F7/0085

  Devices for generating hot or cold treatment fluids · CPC title