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Oxygenation Systems Physician Information > Cardiovascular Surgery > Arrested Heart Surgery
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Silicone Rubber Imitates the Natural Gas Exchange Process in the Human Lung

Medtronic’s ECMO Oxygenators and Surgical Membrane Oxygenators feature a silicone membrane with unique gas transfer properties. Around the world, clinicians choose silicone membrane oxygenators for life-saving procedures.

Typical hollow fiber membrane

Most hollow fiber membrane oxygenators consist of microporous material. Gas exchange takes place by bulk gas transfer via a direct gas to blood interface.


Typical hollow fiber design with a direct gas to blood interface through an open pore.

 

Medtronic silicone membrane

Medtronic solid silicone membrane oxygenators consist of a flat, reinforced silicone membrane envelope that is wound in a spiral coil around a polycarbonate spool. The silicone membrane acts as a highly gas-permeable barrier separating blood and gas compartments. There is no direct blood/gas interface. Gas transfer occurs by molecular diffusion as it does in the human lung. The unique properties of the non-microporous silicone membrane include:

  • Physiologically inert
  • Thromboresistant
  • Non-toxic/Biocompatible
  • Electrochemically identical to the normal capillary
  • Effective gas transfer characteristics

Medtronic silicone membrane
Gas exchange by diffusion through a semi-permeable membrane.

 

 Medtronic

ECMO Oxygenation System

Silicone Membrane Solutions for Extracorporeal Circulation

The Extracorporeal Membrane Oxygenation (ECMO) product line is specifically designed for long-term support. For more than two decades, Medtronic Perfusion Systems ECMO products have been helping to save lives worldwide.

ECMO Oxygenation System

ECMO Oxygenators

These Medtronic silicone oxygenators are indicated for Extracorporeal Membrane Oxygenation (ECMO) and are the standard for ECMO procedures.

  • Biocompatible silicone polymer membrane
  • Gas transfer by molecular diffusion provides efficiency
  • Three models: 0600, 0800, 1500

ECMO Oxygenator Specifications
Model 0600 0800 1500
Surface Area 0.6 m2 0.8 m2 1.5 m2
Static Priming Volume 90 mL 100 mL 175 mL
Maximum Gas Flow Rate 1.8 L/min 2.4 L/min 4.5 L/min
Maximum Blood Flow Rate 1.0 L/min 1.2 L/min 1.8 L/min
Recommended Maximum Sizing by Patient Weight 10 kg 11 kg 19 kg
Blood Port Dimensions 1/4 in 1/4 in 1/4 in
Compliance* 5 mL/100mmHg 10 mL/100 mmHg 20 mL/100 mmHg
Maximum Blood Phase Pressure Drop 200 mmHg 300 mmHg

300 mmHg

Maximum Blood Outflow Pressure 400 mmHg 400 mmHg 400 mmHg
Maximum Transmembrane Pressure 750 mmHg 750 mmHg 750 mmHg

* Blood compartment volume increase (mL) per 100 mmHg applied transmembrane pressure. Transmembrane pressure (TMP) = the pressure in the blood compartment minus the pressure in the gas compartment.

ECMOtherm™ II Heat ExchangerECMOtherm™ II Heat Exchanger

The ECMOtherm™ II Heat Exchanger is used cardiopulmonary support procedures to cool and warm the blood. Typical applications include: total body perfusion, coronary perfusion, rapid infusion, and cardioplegia.

  • The recognized standard for ECMO procedures
  • Stainless steel heat exchanger tubes providing reliable and consistent performance
  • Double seal between blood and water compartments for added safety
  • Luer-lock port on blood inlet to facilitate air removal
  • Blood outlet temperature adapter for accurate blood temperatures
  • Silicone coating applied to stainless steel tubes and inserts to enhance blood biocompatibility
  • Blood flow rate up to 2 L/min
Heat Exchanger Specifications  
Model ECMOtherm II
Priming Volume 50 mL
Water Phase Pressure Limit 65 psi
Maximum Blood Flow Rate 2 L/min
Blood Port Dimensions 1/4 in
Water Port Dimensions 1/2 in


Performance Factor


ECMO Holders

  • Multi-axis holder design
  • Ensures secure placement of the oxygenator
  • Oxygenator and heat exchanger sections of the holder rotate and spin within their plane to provide optimum flexibility for custom applications
  • Facilitates easier priming

Assist Reservoirs

The R-14 and R-38 Assist Reservoirs are intended for use as a venous reservoir in conjunction with oxygenators that are indicated for use in ECMO procedures.

  • Collapsing design aids in sensing interrupted venous return
  • Provides excellent flow dynamics with reduced potential for thrombusformation at minimum flow rates
  • Seamless design made of biocompatible silicone
  • Dual vent tubes for easy air removal or drug infusion
  • Two model choices for 1/4 or 3/8 inch circuits
Assist Reservoir Specifications
Model R-14 R-38
Inlet Tubing 1/4 in 3/8 in
Outlet Tubing 1/4 in 3/8 in
Upper Aspiration Port x 2 1/8 in with Luer lock fittings 1/8 in with Luer lock fittings
Priming Volume 35 mL 35 mL
Recommended Minimum Blood Flow Rate 50 cc/min 50 cc/min
Recommended Maximum Blood Flow Rate 500 cc/min 500 cc/min

> Download the Silicone Membrane Brochure

 

 
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