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About Dr David Andrew Yeung

After studying science in Mauritius in 1964, I taught science in a secondary school for 4 years. Then in 1968, I went to study medecine at the University Of Montpellier in France. As nearly all medical students, I had the dream of being a future Nobel Prize winner in medecine.

After considering the complexity of medical studies with so many diseases of complicated diverse pathogeneses, I kept telling myself that there is surely a 'single concept' that has escaped the attention of Prominent Professors and that it found simplify medecine and help save countless of lives. Needless to say I read a lot of medical books outside the university's curriculum which somehow affected my medical studies.

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Consequently I had to resit for several examinations - moreover I did not find that 'single concept'. After my graduation on 1977, my main objective was medical research - it is in fact for this purpose that I applied for a Research Position in the USA in order to develop a mechanical heart valve and a valve conduit. However I was offered two Clinical Fellowship training programs at the Texas Heart Institute and at the Los Angeles St Vincent Medical Centre in 1977-1979, where I started dreaming about the Ideal Heart Lung Machine - the ultimate Life Saving Machine. I tried to obtain a Research Fellowship towards that goal but in vain.

Back to Mauritius in 1980-1984, I invented the Sponge Oxygenator but could not develop it to an acceptable level and in 1985-1988, I was offered a Clinical Position at the King FAHD Hospital in Jeddah where I spent the last 3 years working in the big ICU. It was there that, thanks to God, I discovered the indepth secrets of patients dying prematurely under the grips of severe diseases of multiple diverse pathogenesis : this is indeed the 'single concept' that I have been looking for since I started my medical studies in 1968.

This 'single concept' led to the formulation of The Blue Thesis that Controlled Hibernation is the one and only system that can potentially save at least 50 million lives out of the 70 millions premature death yearly (WHO statistics). Of ultimate importance are the experiments done by Professor John Gibbon on Hypothermia/Profusion Rate/O2 Consumption.

Evidently the idea of inventing the Ideal Heart Lung Machine continue to occupy my mind and in 1996 I deposited an application for a patent concerning H2O2 Blood Oxygenating Process at Hypothermia and some time later I invented the H2O2 Artificial Lung System(HALS) for which I deposited an application for a patent.

BODBOD at Hypothermia patent

 

HALSHALS patent


However due to a lack of funds, it is only in 2004 that I succeeded in manufacturing prototype 1 of "HALS" for which I obtained the prestigious St Jerome Prize in Budapest in May 2004 and a Bronze Prize at the INTEX Competition in Kuala Lumpur in May 2005.

In 2010 I manufactured prototype 2 of "HALS" and as I considered the Roller Pump not to be suitable for the Ideal Heart Lung Machine, I replaced it by a Diaphragm Pump which is controlled by a variable DC source : I had to modify the blood circuitry many times to obtain the final one.

 

Tests Performed

  • In January 2013, I put this new model of the Ideal Heart Lung Machine to the Test 1 which gave excellent performance in (i) cooling capacity, (ii) simplicity of operation ,(iii) great maniablility and versatility - Perfusion Rate and Perfusion Pressure very easily controlled ( 4-12 l/m, 40-65-mmHg or more as needed). Of ultimate importance is that this new Heart Lung Machine can be operated right away without any preparation at all , does not need preliminary priming , the Circulation Time is only 20 seconds and not one single tiny bubble of air and CO2 enters the patient blood circulation. VT1, VT2 are two extraordinary air and CO2 traps.
  • On 22nd February 2013, Test 2 was performed using 4 litres of venous heparinised blood.
  • In March 2013, Test 3 was performed - The breakdown of H2O2 into H2O and O2 has been made slower than in Test 2. This method to be used for elective Controlled Hibernation for needy patients. No foaming has occured.
  • In May 2013, Test 4 was performed with the introduction of the Portable Prototype of IHLM for life rescue operations outdoors.
  • In September 2013, Test 5 was performed with the introduction of the New Model of Portable Prototype of IHLM for life rescue operations outdoors. 12 Volts Attwood Diaphragm Pump to work on 6 Volts DC Source from one 6-volts battery (Autonomy 3-5 hours) for Emergency Life Rescue Operation Outdoors.
    Three 12 Volts Solenoid valves to ensure the safest (no air bubble into the patient's blood circuit) CH Procedure. The IHLM is thus in reality Extracorporeal H2O2 Oxygenation (ECHO) and is definitely the ultimate alternative to ECMO - hopefully quite soon.
  • October 2013 : Test 5A (Technique III) - ECHO has reached the "Everest - EO2 " in Blood Oxygenation.
  • May 2014 : Test 5B (Technique IV - Simulation of CAP Technique ).
  • June 2014 : Test 5C (Simulation of CAP Technique ).
  • November 2014 : Test 5D (Simulation of CAP Technique ).

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Other Treatments

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Our Achievements

  • The Ideal Heart Lung Machine

    • Ihlm The Ideal Heart Lung Machine is the conclusion of the most fascinating history of Oxygenating Pumping Systems which started 2 centuries ago with Le Gallois in 1812.

     
  • Protocols to improve or cure very quickly some common diseases

    • PsoriasisPsoriasisIIVery severe gastroenteritis, bronchitis, extreme or very severe burns, very severe bronchial asthma.

    Some auto immune diseases such as psoriasis, ulcerative colitis, rheumatoid arthritis and SLE(1 case only). I have planned, for a start, to apply a New Rhumatoid Arthritis Treatment Protocol and a New Psoriasis Treatment Protocol as soon as possible to patients suffering from RA including also RA patients who have not responded to DMARDs (Mauritius and abroad) and to Biologics Treatment Protocols (abroad).
    The reason that I obtained much better results than other medical practitioners is that I have taken into consideration 2 most important aspects of the pathophysiologies of these diseases.

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Testimonials

  • Le Gallois Prediction

If one could substitute for the heart a kind of injection of artificial blood either naturally or artificially made, one could succeed in maintaining alive indefinitely any part of the body whatsoever.