SU858844A1

SU858844A1 - Heart prostehsis valve /its modifications/

Info

Publication number: SU858844A1
Application number: SU792849054A
Authority: SU
Inventors: Сергей Анатольевич Лукин; Виктор Ильич Копин; Валерий Викторович Рыбкин
Original assignee: Предприятие П/Я В-2481
Priority date: 1979-12-06
Filing date: 1979-12-06
Publication date: 1981-08-30

Description

(54) КЛАПАН ДЛЯ ПРОТЕЗА СЕРДЦА (ВАРИАНТЫ)(54) VALVE FOR HEART PROSTHESIS (OPTIONS)

1one

Изобретение относитс к медицинской технике, а именно к аппаратам вспомогательного кровообращени дл сердечных насосов.The invention relates to medical technology, namely, ancillary circulatory apparatus for heart pumps.

Известен клапан дл протеза сердца , содержащий створки, закрепленные в проходном канале и расположенные против каждой створки радиальные расширени flj.A valve for heart prostheses is known, comprising flaps fixed in the passageway and radial expansions flj arranged opposite each flap.

Однако известный клапан имеет существенный недостаток, а именно наличие застойных зон вблизи основани клапана.However, the known valve has a significant drawback, namely the presence of stagnant zones near the valve base.

Цель изобретени - устранение застойных зон вблизи основани клапана путем формировани направленного кровотока .The purpose of the invention is to eliminate stagnant zones near the base of the valve by forming a directed blood flow.

Указанна цель достигаетс тем, что в клапане дл протеза сердца по варианту 1, содержащем створки, закрепленные в проходном канале и расположенные против каждой створки радиальные расширени , поверхности радиальных расширений, обращенные кThis goal is achieved by the fact that in the valve for a heart prosthesis according to option 1, comprising sashes fixed in the passageway and located opposite each sash radial expansions, surfaces of radial expansions facing

створкам, совместно с внешней поверх-ностью проходного канала образуют полости , которые имеют дополнительные каналы дл подключени к источнику пульсирующего воздушного давлени .the flaps, together with the external surface of the flow channel, form cavities that have additional channels for connecting to a source of pulsating air pressure.

Указанна цель достигаетс также тем, что в клапане дл протеза сердца по варианту 2, содержащем створки, закрепленные в проходном канале и расположеннь1е против каждой створки ра10 диальные расширени , поверхности радиальных расширений, обращенные к створкам, совместно с внешней поверхностью проходного канала образуют полости, при этом последние заполнеts ны упругим материалом.This goal is also achieved by the fact that in the valve for the heart prosthesis according to option 2, which contains sashes fixed in the passage channel and radial expansion located opposite each sash, the surfaces of the radial expansions facing the sashes together with the outer surface of the passage channel form This last is filled with elastic material.

На фиг. 1 изображен клапан дл протеза сердца, общий вид; на фиг. 2 клапан дл протеза сердца, вариант 2.FIG. 1 shows a valve for a prosthetic heart, a general view; in fig. 2 valve for heart prosthesis, option 2.

Claims

The valve for the prosthetic heart in Option 1 contains flaps 1 fixed in the passage channel 2 and radial expansions 3 located opposite each flap 1, and the surfaces of the radial extensions 3 facing the flaps 1, together with the external surface of the passage duct, form cavities A, which have additional channels 4 for connecting to a source of pulsating air pressure (not shown). The valve for heart prosthesis in option 2 contains flaps 1 fixed in the passage channel 2 and radial expansions 3 located opposite each flap 1, and the surfaces of the radial extensions facing the flaps together with the outer surface of the passage duct form cavities A, the latter being filled with elastic material. Valve for prosthetic heart option works as follows. When the ventricle of the heart (in the diastole phase) is filled, the valves 1 are open, and in the pneumatic chamber of the prosthesis of the heart and cavity A, a negative pressure is generated from the source of pulsating air pressure through channel 4, under the action of which the outer surface of the passageway 2 together with the surface of the radial expansion 3 facing the flaps 1 deflects and moves towards the outer surface of the passage channel, while the volume of cavity A decreases. When blood is ejected from the ventricle of the heart (in the systole phase), the valve 1 is closed, a positive pressure is created in the pneumatic chamber of the prosthesis of the heart and cavity A, and the cavity A increases in volume and removes blood from the stagnant zones near the valve base. The valve for the prosthetic heart in Option 2 operates as follows. When blood is released from the ventricle (in the systole phase), an overpressure is created in the ventricle, as a result of which, simultaneously with the closure of the valves 1, the outer surface of the wall of the passageway 2 together with the radial expansion 3, deflection, moves radially to the outer surface passage 2, while the volume of the cavities A. filled with elastic material is reduced. When the ventricle of the heart is filled (in the diastole phase), leaflet I opens, the pressure in the ventricle decreases, the volume of the cavities A increases and removes blood from the stagnant zones to the main flow, performing an intensive mass exchange between the main flow through the valve and the stagnant zones near the valve base. Valves for heart prostheses ensure elimination of stagnant zones near the valve base by forming directed blood flow. Elimination of dead zones for valves for option 1 occurs in a time equal to two or three pulsations, and for valves in option 2, a time equal to three or four pulsations, while for known valves it takes up to five cycles. Claim 1. A valve for a prosthetic heart comprising flaps fixed in the passageway and radial expansions opposite each flap, characterized in that, in order to eliminate stagnant zones near the valve base by forming directed blood flow, the surfaces of the radial expansions facing the flaps , together with the outer surface of the passageway, they form cavities that have additional channels for connecting to a source of pulsating air pressure.

2. A valve for a prosthetic heart containing flaps fixed in the passageway and located opposite each flap radial expansions, characterized in that, in order to eliminate stagnant zones near the valve base by forming a directional blood flow, the surfaces of the radial extensions facing the flaps jointly with the outer surface of the passage, cavities are formed, while the latter are filled with an elastic material. Sources of information taken into account in the examination 1. USSR author's certificate in patent No. 2634289 / 28-13, cl. A 61 M 1/03, 1978.