Abstract
A new externally adjustable constrictor device for renal artery stenosis in the dog is described. The constrictor combines hydraulic and mechanical characteristics, and is connected to the exterior of the animal by a thin catheter. Applying hydraulic pressure via the catheter causes the plunger in the device to compress the renal artery to any desired degree of stenosis. A mechanical catch prevents backward movement of the plunger, thus ensuring a stable, irreversible renal artery constriction. This constrictor was implanted in 13 dogs, together with an electromagnetic blood flow sensor around a renal artery. In twelve dogs the constriction procedure was performed 3-12 weeks after implantation, and in all 12 cases the intended degree of stenosis [defined as percentage renal blood flow reduction (RBF)] was achieved within a range of 10%. In 5 dogs the long-term stability of the stenosis was studied and the RBF reduction appeared to be stable up to at least 6 weeks after constriction. In conclusion, the presented constrictor device is easily externally adjustable, and allows induction of a stable renal artery stenosis of various degrees in the conscious dog.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.