Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1997-08-29
1999-08-17
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
A61M 500
Patent
active
059386380
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for the controlled injection of a programmable quantity of liquid in diagnostic and therapeutic medical procedures.
More specifically, the invention relates to a device of this type which allows a programmable quantity of liquid to be injected, varying the speed of injection from slow drip infusion up to rapid flow injection.
As is known, the requirement of having a device of this type is felt in nearly all branches of medicine, among which, but not limited to, include intensive care and anesthesiology (infusion of medications and biological liquids), oncology (infusion of chemotherapy), hematology (blood and plasma transfusions), cardiosurgery (heart-lung machine), gastroenterology/anesthesiology
utrition (parenteral feeding), nephrology (hemodialysis), radiology (injection of contrast medium agents).
It is also true, as in all of the other branches of medicine, that different infusion systems are used according to the specific requirements, especially with regard to the precision of the quantity and speed of injection.
Among those known, without a doubt the simplest infusion system is the "drip".
The drip may be easily regulated according to the height of the flask containing the liquid and the resistance created on the flow path by the gauge of the needle and any compression systems used on the flow control.
In other cases, the infusion system may be equipped with mechanisms to assist the speed of injection by means of pneumatic compression of the liquid container, which in this case obviously cannot be rigid.
The art also uses syringe systems and peristaltic pump systems, of which there are innumerable modes according to the area of usage, the type and quantity of liquid to be injected, the required precision, the minimum speed and the maximum speed of injection.
All users in the area already know that each of these systems has advantages and disadvantages regarding their functionality, technical specifications and cost factors.
The most important requirements in terms of quantity of liquid injected, speed of injection and precision of injection parameters are in the radiology field, where over the years the development of manual, semi-automatic and automatic injectors has shown a significant upsurge.
As a brief historical outline, the need for mechanical injection systems for contrast media in radiology began at the end of the 1920s with the origin of angiographs, mostly thanks to Egas Moniz and Manuel Dos Santos, who, in 1927 and 1929, respectively, were the first to perform cerebral angiographs and abdominal aortographs by percutaneous puncture.
By the middle of the 1950s, angiographs were limited by accessibility, by direct puncture of a few vascular areas, albeit with significant risk, to the need for catheterizations, surgically introducing a catheter by which contrast media were injected, despite the relative toxicity of the contrast agent, the early use of catheters and other angiographic accessories, and the relatively modest use of vascular surgery.
In view of the foregoing, from the end of the 1920s until the 1960s, the demand for mechanical systems for pressurized injection of contrast media was quite low. Pressure injection was indispensable for obtaining a rapid flow of the contrast medium and, consequently, optimal angiographic opaquing of the vascular area being examined.
In 1963, the Swede Seldinger developed a new technique for percutaneous non-surgical introduction of catheters in veins, as a result of which there was a rapid and massive increase in the use of angiographic procedures, which was aided by both the development of rapid automatic seriographs and contrast intensifiers, which were ideal for endovascular guiding of catheters under intensified direct radioscopic control, as well as injectors which were capable of injecting a large quantity of contrast medium in a short time, with a rapid flow rate.
The first mechanical injector made, which was not automatic, was the manual mechanical pump injector, substantially consisting of, with few vari
REFERENCES:
patent: 2193177 (1940-03-01), Laythorpe
patent: 4296500 (1981-10-01), Monties et al.
patent: 4619594 (1986-10-01), Moir
patent: 5303585 (1994-04-01), Lichte
Bonetti Alessandro
Passariello Roberto
LandOfFree
Device for the controlled injection of a programmable quantity o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for the controlled injection of a programmable quantity o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for the controlled injection of a programmable quantity o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-310197