Surgery – Instruments – Internal pressure applicator
Patent
1999-01-08
2000-03-14
Jackson, Gary
Surgery
Instruments
Internal pressure applicator
606191, 604104, 604107, A61M 2900, A61M 532
Patent
active
060367164
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates in general to medicine and more specifically to microsurgery; the invention can find application both for dilating stenosed portions of tubular organs and blood vessels and for fixing the edges of holes in tissues or holding prostheses, e.g., when positioning occluding, valve, or filtering prosthetic appliances on parietal lesions or defects, as well as on inosculations of hollow or tubular organs.
BACKGROUND ART
Known in the present state of the art is a microsurgery fixing member of a self-locking vascular prosthesis (cf. USSR Inventor's Certificate # 1,217,402, IPC A61F 2/06, 1986), which is in fact a flat spring appearing as a wire bent into a Z-shape. However, the device in question is inconvenient in use, since the spring fails to establish a closed loop or circuit.
Another disadvantage of the fixing member under discussion resides in that its field of application is limited only to fixing a prosthetic vessel. One prior-art microsurgery fixing device (U.S. Pat. No. 4,580,568, IPC A61M 1/34, 1986) is known to appear as a spring bent into a Z-shape establishing a closed loop or circuit formed as a cylinder.
The known device is disadvantageous in that its field of application is limited and the device is applicable only to hollow tubular organs. A prior-art device for installing a self-locking vascular prosthesis (cf. USSR Inventor's Certificate # 1,318,235, IPC A61M 29/00, 1986) is known to comprise a flexible tubular guide and a pusher, both enabling the prosthesis to be transported and positioned in the lumen of the vessel involved. The aforementioned known positioning means is disadvantageous in that it is incapable of changing the position of the prosthesis after the latter has been released from the tubular guide.
A prior-art manipulation device for positioning an intravenous filter (cf. RU Patent # 2,000,18, IPC A61M 1/34, 1992) is known to comprise a pusher appearing as a stilet with tie-members held in place thereto and appearing as elastic bars provided with coupling sleeves fixed at their ends and aimed at joining with the appliance being implanted.
A disadvantage inherent in said known positioner resides in that its construction does not provide a possibility of withdrawing the implantable appliance. In addition, its use is fraught with a danger of a premature disjoining from the fixing members of the appliance being implanted.
DISCLOSURE OF THE INVENTION
With specific problem in mind, it is a particular and primary object of the present invention, as far as the microsurgical fixing device is concerned, to extend the field of application and functional capabilities of the proposed microsurgical fixing device, namely, to provide a possibility of strengthening the edges of holes in tissues and fixing occluding, valve, or filtering prosthetic appliances on parietal defects or on inosculations of hollow or tubular organs.
With specific problem in mind, it is a particular and primary object of the present invention, as far as the manipulation positioning pusher is concerned, to attain higher reliability and safety in positioning the fixing device by providing a possibility to position, remove, displace, or withdraw it while neither breaking the device nor damaging the surrounding tissues. The foregoing object is accomplished, as far as the microsurgical fixing device is concerned, due to the fact that said device comprising a spring appearing as an elastic Z-shaped bar that forms a closed loop, further comprises at least one spring appearing also as an elastic Z-shaped bar, each of said springs being so arranged that its opposing apices are disposed along the perimeters of the bases of a cone frustum or along concentric circles that form a flat ring, while the apices of zigzags of said Z-shaped bar in each spring located on the same base of the cone frustum or along the same ring circle are joined together with the apices of zigzags of a next spring which are also arranged on the same base of the cone frustum or along the same ring circle throu
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Karpenko Vladimir Leonidovich
Kruchinin Boris Petrovich
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