NRI Cardiologist’s Innovations,
Promises More Effective Treatment for Millions worldwide
Blood perfusion balloon catheter
Great Staff- Click for bigger View
Los Angeles, Jan 19, 2010
By Gary Singh
As we get older, we lose some blood-pumping ability in our hearts, but heart failure results from the added stress of health conditions that either damage the heart or make it work too hard. When cholesterol and fatty deposits build up in the heart's arteries, less blood can reach the heart muscle. This build-up is known as atherosclerosis. The result may be chest pain (angina) or, if blood flow becomes totally obstructed, a heart attack. Angioplasty is widely used for opening stenoses throughout the vascular system and particularly for opening stenoses in coronary arteries.
Most heart attacks happen when a clot in the coronary artery blocks the supply of blood and oxygen to the heart. A blockage that is not treated within a few hours causes the affected heart muscle to die.
Image: (Courtesy of National Heart, Lung, and Blood Institute, Diseases and Conditions)
Dr. Harvinder Singh Sahota, cardiologist is very clear about one thing: though deemed “extraordinary,” his measures to save life of millions worldwide were what any other doctors would do. We hate to call it a story, it’s NRI’s life, just life. “How could you not?”
In 1985, Dr Sahota invented the “Sahota Perfusion Balloon” that is used in angioplasty surgeries all over the world.
Angioplasty: A method of administering an angioplasty treatment to a patient to produce acceptable blood flow in a stenotic region of a coronary artery having restricted blood flow, comprising:
- A balloon catheter is inserted into the desired coronary artery, locating the balloon at the arterial stenosis and injecting a suitable fluid into tile balloon to expand the balloon, and therefore the stenosis, radially outwardly. Some balloon catheters are too flexible for direct insertion into the patient's coronary artery. Accordingly, the standard angioplasty process begins with the insertion of a guiding catheter, or sleeve into the obstructed vessel, under local anesthesia.
- Guidewire: To facilitate the introduction of the guiding catheter, and to avoid damage to the body lumen at the puncture site, a guidewire is typically used in the insertion of the guiding catheter. The guiding catheter is designed to provide a conduit through which a balloon catheter is passed.
The Perfusion Balloon - the "Sahota Perfusion Balloon" is used in angioplasty surgeries all over the world.
April 08, 1986: United States patent 4,581,017, a conventional catheter was registered by Dr. Sahota . This catheter is believed to include an elongate tubular shaft defining a guide wire and perfusion lumen, and an inflation lumen. A dilatation balloon is carried on the tubular shaft near the distal end thereof, and communicates with the inflation lumen. In order to allow perfusion blood flow past the inflated balloon, the catheter shaft defines at least one proximal and at least one distal perfusion port opening outwardly from the guide wire and perfusion lumen on opposite sides of the balloon. When the balloon is inflated to dilate the lesion, perfusion blood may flow through the guide wire lumen past the balloon.
November 03, 1992: United States patent No. 5,160,321, another conventional catheter was also registerd by Dr. Sahota. The catheter depicted in the Sahota patent employs a separate inner lumen to outwardly bound an annular axially extending passage through which blood may flow past the inflated balloon via perfusion ports. Also, this separate inner lumen inwardly defines a passage through which extends the guide wire assembly for the catheter.
However, with catheters of the type illustrated by the Sahota patents, and others of this type, the distal portion of the catheter is obstructed by the guide wire, or by the guide wire and its lumen. Consequently, the cross sectional area of the catheter lumen which is available for blood perfusion past the inflated balloon is very limited. While the distal end portion of the catheter may be made of a size sufficient to pass an adequate volume of blood, this size increase is contrary to the recognized advantages of having a low-profile catheter.
The most common design is known as an "over-the-wire" balloon catheter. This conventional device typically utilizes a relatively large lumen for passage of a guide wire and injection of contrast fluid (or angiographic visualization dye) to assist in the placement of the device. A second parallel lumen is provided for inflation and deflation of the balloon.
This invention relates generally to an active perfusion balloon catheter, particularly, a catheter having a magnetically driven impeller to facilitate blood flow. Active perfusion balloon catheters may be used in percutaneous transluminal coronary angioplasty and in other medical procedures to maintain blood flow through body lumens.
The need for active perfusion catheters has become more desirable with advances in micro-surgery, neuro-surgery, interventional neuroradiology, minimally invasive coronary arterial bypass procedures, intravascular radiation for prevention of restenosis after angioplasty and stenting, and conventional angioplasty procedures.
You do know who Dr. Sahota is, right? Silly me needs to realize that not everyone may know. Let me tell you a little bit about the man himself.
I was absolutely blown away by Dr. Sahota'e warmth and hospitality. I was in his office almost one hour and even though we had lunch at a restaurant I felt as though we were sitting in his dining room. He was 100% attentive to my questions and needs and you could very much tell that he is a man of character.
Dr. Sahota, as an innovator have passion and realizes everything has economic value. He used the complex processes to address the needs of others. He loves is patients, he cares deeply about everyone! He's a kind hearted, intelligent, wonderful family doctor who would do anything to insure his patients are getting the best of what they need.
.First off, thank you Dr. Sahota for agreeing to take part in this interview! Many of our readers will know how appreciative I am of your innovation and hard work.