Artificial valve providing auxiliary blood circulation and usable in artificial heart

FIELD: medical engineering.

SUBSTANCE: device is designed as flexible hose segment of flat cross-section enveloping base member manufactured as circular or oval ring. The opposite end is left free. The valve has an additional member like supporting plate (contour frame or contour loop) rigidly fixed on the base member and embraced with free end of the flexible hose. To achieve better conditions for blood flow to wash working member surface, the member is perforated in zone of its attachment to the base member. To achieve better biocompatibility conditions, valve member is manufactured from natural patient blood vessel.

EFFECT: high operation reliability and reduced hemolysis.

4 cl, 2 dwg

 

The invention relates to devices, artificial organs, implanted in the human body, and can be used in natural or artificial heart and ventricle.

The working element of the proposed artificial valve made of a short segment of an elastic hose flat section, tightly covering one end of the base element of the valve is made in the form of a circular or oval base ring of solid or solid-elastic material, and the opposite free end of this segment of the hose is located in the median plane of the ring.

The basic part of such a valve may be kept tightly covered in the blood vessel of the patient or artificial vessel (figures 1 and 2 is indicated by figure 4) or by a wall of natural or artificial hearts and ventricular heart.

You can perform a valve with an additional element of its device, in the form of a rigidly fixed on the base ring with a thin streamlined shape of the supporting plate, covered by a free end of a short section of hose.

In this embodiment, the valve short length of hose can be not only flat, but round or oval in cross-section, it can also be made from natural vessel of the patient.

The drawings schematically shows two constructive variants proposed the constituent of the valve. Figure 1 shows a variant of the device in which only two - basic and working elements of the valve. Figure 1 shows a base element having the form of a ring with a spherical outer and cylindrical inner surfaces, tightly covered by the end of a short segment of an elastic hose flat section (see number 2), which serves as a work item of the valve. Figure 2 shows a variant of the device, in which in addition to the basic working elements has a third additional element of the valve, in the form of a rigidly fixed on the base element thin streamlined support plate (indicated by figure 3A)covered by the free end of the short section of hose that serves as a work item of the valve. The purpose of this option is the implementation of giving a more sustainable position the free end of the short section of hose that is located in the median plane of the base element.

Instead of supporting plates (3A) can serve as a contour frame (3b) or contour loop (3C), and for the best washer direct (arrows) and reverse blood flow surfaces of a work item, it is perforated with holes (5)located in the zone of attachment.

In comparison with the known analogs of the proposed technical solution can be more responsive to the requirements of the "physiology" for implantable items SIS who eat auxiliary circulation and artificial heart as well as more simple and reliable in design and technological terms, and more durable and is available for General use.

1. Artificial valve for auxiliary systems and substitution circulation, including a working element in the form of a segment of flexible hose covering one of its ends the base element in the form of a ring of circular or oval form, characterized in that it introduced support plate streamlined shape, is rigidly fixed on the base element, the other end of the cut hose is made free and covers the support plate, and the hose has a cross-section of a flat shape.

2. The valve according to claim 1, characterized in that the working element is perforated in the area of attachment on the underlying element.

3. The valve according to claim 1, characterized in that the supporting plate has the shape of a contour or a contour loop.

4. The valve according to claim 1, characterized in that section of hose used segment of the natural vessel of the patient.



 

Same patents:

The invention relates to medical equipment and can be used in heart surgery to replace a diseased natural heart valves person

The invention relates to the field of medicine

The invention relates to medical equipment, namely, devices for installation of the aortic valve or frameless Bioprocess of the aortic valve for bench research in pulsating flow of biomechanics and hydrodynamics of native (allogeneic, xenogeneic) valves of the aorta and frameless substitutes (allografts, xenografts)

The invention relates to medical equipment and can be used in heart surgery to replace a diseased natural heart valves person

The invention relates to a prosthetic heart valve and can be used to replace a diseased natural heart valves person

The invention relates to medicine, namely to cardiovascular surgery

The invention relates to medical equipment and can be used in cardiac surgery

The invention relates to medical equipment and can be used in heart surgery to replace a diseased natural heart valves person

The invention relates to medical equipment and can be used in heart surgery to replace a diseased natural heart valves person
The invention relates to the field of medicine, namely cardiovascular surgery, and can be used in the treatment of complex congenital heart defects

FIELD: medical engineering.

SUBSTANCE: device is designed as flexible hose segment of flat cross-section enveloping base member manufactured as circular or oval ring. The opposite end is left free. The valve has an additional member like supporting plate (contour frame or contour loop) rigidly fixed on the base member and embraced with free end of the flexible hose. To achieve better conditions for blood flow to wash working member surface, the member is perforated in zone of its attachment to the base member. To achieve better biocompatibility conditions, valve member is manufactured from natural patient blood vessel.

EFFECT: high operation reliability and reduced hemolysis.

4 cl, 2 dwg

FIELD: medical engineering.

SUBSTANCE: device has two leaflets. The leaflets are mounted on finger member allowing rotation about artery axle and have working ends and shank. The working ends have fitting surfaces restricted with thrusting and holding ribs. A holding rib has internal and external end surface. The external end surface of holding rib of each leaflet has protrusions having centering surfaces manufactured as portions of the same revolution surface having diameter of Dc. Revolution surface axis coincides with the central axis of the holder.

EFFECT: excluded valve displacement relative to fibrous ring; reduced risk of canal dysfunction; improved long-term prosthetic operation results.

3cl, 4 dwg

FIELD: medical engineering.

SUBSTANCE: device has body having external and end face surfaces and envelope box cuff. Locking member is mounted in the device body. The locking member is connected to the device body by means of rotation unit of hinge type. External surface of the device body has ring-shaped protrusion having fitting and supporting surfaces. The envelope box is collapsible and detachable. It has bushing and ring having smooth or threaded connection between them. The device body has two external surface areas free of the cuff adjacent to end face surfaces of the body.

EFFECT: high reliability and long service life.

4 cl, 3 dwg

FIELD: medical engineering.

SUBSTANCE: device has ring-shaped body, fixing members 3 manufactured as protrusions and rotatable cusps mounted in the ring-shaped body. Slots are available on lateral surfaces of body fixing members mainly arranged along central axis of the device body. Protrusions are available on lateral surfaces of slots produced on lateral surfaces of cusp. The protrusions are engageable with slots in device body.

EFFECT: higher thrombus formation resistance.

6 cl, 5 dwg

FIELD: medical engineering.

SUBSTANCE: device has cylindrical body and locking disk member mounted therein with rotation about axis displaced relative to diameter being in parallel to it. Disk member center of gravity is deviated relative to its geometrical center and set so that its rotation axis passes through the center of gravity and the member itself is engageable with opposite device body ends in closed state. The device body has locking disk member stroke stopper manufactured as prominence located between the locking disk member rotation axis and device body diameter arranged in parallel to the rotation axis.

EFFECT: enhanced effectiveness of operation; reduced force magnitude needed for opening the locking member; maximum effective cross-section in open position.

6 cl, 1 dwg

FIELD: medical engineering.

SUBSTANCE: device has connection member manufactured from absorbable material connected to thread on one of its ends. The thread transmits longitudinal pulling force for introducing the connection member into valve ring tissue to set up it therein. The second device embodiment has different needle design. The needle is introduced into endomyocardium of valve ring and brought through a part of the opening perimeter. The needle is brought out and the connection member is introduced into endomyocardium by means of the thread in a way that free end of the connection member is to be at introduction point. The connection member is fixed in the endomyocardium and brought through the ring to the position characterized in that the other end is located in removal point and exits in this way from the endomyocardium. The second end is fixed.

EFFECT: normalized valve ring growth in children.

29 cl, 9 dwg

FIELD: medicine.

SUBSTANCE: method involves arranging testee and additional valves in system circulation canal with parameters of working liquid flow having physiological values. The working liquid has blood viscosity. Hemolysis degree is determined from changed elastic stress relaxation time in working liquid samples taken in course of the experiment. Preliminary tests are carried out with several additional valves of different hemolytic properties under working liquid flow parameters being fixed. Total hemolysis degree is measured in various combinations of mounted additional valves in circulation system canal. After having solved a linear equations system, hemolysis degree values as contributions caused by circulation system and additional valves. Hemolysis degree of a valve under test tested in combination with one of additional valves is calculated from a formula ΓNΣ0add, where ΓΣ is the total hemolysis degree, Γ0 is the hemolysis degree contributed by circulation system, Γadd is the hemolysis degree of additional valve used.

EFFECT: high accuracy in determining hemolysis degree.

1 dwg

FIELD: medicine, cardiosurgery.

SUBSTANCE: the method deals with valvular reprosthetics. After dissecting a prosthesis and treating infectious foci with antiseptics it is necessary to implant a carcass xenoprosthesis faced with epoxy-treated xenopericardium. At implanting xenoprosthesis into mitral position it should be fixed in position of fibrous ring by separate P-shaped sutures, one part of which could be upon interlayers. At implanting xenoprosthesis into tricuspid position it should be fixed in position of fibrous ring, moreover, septal valve should be fixed with separate P-shaped sutures, anterior valve - in the middle with a single P-shaped suture, The rest length of xenoprosthesis should be fixed with uninterrupted blanket suture.

EFFECT: decreased chance for prosthetic infectioning.

2 ex

FIELD: medical engineering.

SUBSTANCE: device has working member manufactured as viscoelastic ring-shaped corrugation having blank wall, tightly embracing a base ring with passage orifice of round or oval shape. Movable part of the working member is represented with one or several cusps belonging to the blank wall of the viscoelastic corrugation. The cusps have thickenings in diametric or radial direction and/or supporting pins transecting the passage opening to prevent them from being drawn by pressure into passage opening of the base ring.

EFFECT: simplified valve design.

7 cl, 10 dwg

FIELD: medical engineering.

SUBSTANCE: device has grooves, bevel or ledge on each cusp closure surface to guide limited reverse blood flow directly to articulated members and casing and cusp surfaces adjacent thereto. The cusps allow forced rotation about casing axis due to limited reverse blood flow tangentially arriving when having the cusps closed, to make blood volume whirl about the central axis of the casing when entering the prosthesis and opening cusps.

EFFECT: high resistance to thrombus formation; prolonged service life; high reliability; reduced load applied to patient heart.

3 cl, 10 dwg

Up!