A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/00 (2006.01) A61B 8/00 (2006.01) A61B 10/00 (2006.01) A61K 9/127 (2006.01) A61K 45/00 (2006.01) A61K 49/00 (2006.01) A61M 1/00 (2006.01) A61M 5/145 (2006.01) A61M 27/00 (2006.01)
Patent
CA 2433205
A medical device to inject drugs, drain bodily fluids, or to perform biopsy is disclosed. The device will permit localized drug delivery, fluid drainage, or biopsy through real-time monitoring of the needle tip position within a patient. The device will permit controlled dispersion of a drug into solid tissue as well as delivery into specific blood vessels. As a needle is inserted an echogenic fluid, such as a saline solution or an ultrasound contrast agent, is injected into the patient. The fluid travels a brief distance before being slowed and stopped by the patient's tissue. This fluid flow will be detectable by ultrasound, likely Doppler ultrasound. The position of the needle tip during insertion will be monitored using an ultrasound until it is positioned at the desired point of action. A therapeutic drug is then delivered. Alternatively, a vacuum pump could then be used to aspirate fluid for drainage or tissue for biopsy. During needle insertion, the fluid flow rate may be adjusted to vary the volume of space detectable by the ultrasound so as to maintain a properly defined image of the needle tip. Once the needle tip is positioned at the point of action, the echogenic fluid can be pulsed, repeatedly and at a variety of flow rates, until the fluid distribution pattern is satisfactory and the drug can then be delivered.
French David J.
Keenan James Alexander
LandOfFree
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