CN2668155Y - Vascular graft dilating and cardiovascular filling device capable of automatically limiting pressure - Google Patents

Abstract

The utility model belongs to the medical equipment field used for the cardiovascular surgery, in particular to a vascular graft dilating and cardiovascular filling device capable of automatically limiting pressure. One end of a first pipe (6) is provided with a liquid inlet (1), and the other end of the first pipe is provided with a liquid outlet (3); the intermediate section of the first pipe is provided with an opening (7), and the opening (7) is connected with a second pipe (6'); the first pipe is communicated with the second pipe; the first pipe (6) on the intersecting point between the first pipe (6) and the second pipe (6') is provided with a triple valve (2), the connection point between the first pipe (6) and the second pipe (6) is provided with a pressure reducing side valve (4), and the rear side of the pressure reducing side valve (4) is provided with a pressure control spring (5). The utility model can remarkably reduce the damage to the tissue organ or blood vessel graft owing to the injection pressure or high expand pressure, and the preparing course of the clinic coronary circulation bridging material is more scientific.

Description

But expansion of the blood vessel graft of volitional check pressure and cardiovascular device for casting

Technical field

This utility model belongs to the cardiovascular surgery field of medical, but particularly the blood vessel graft of volitional check pressure is expanded and the cardiovascular device for casting.

Background technology

In cardiovascular surgery treatment field, must come into contacts with injection pressure in the time of many.Aortic root infusion as total body perfusion in the extracorporeal circulation process and myocardium protecting liquid; Trunk operation and neonate operation when needing Deep Hypothermia Circulatory Arrest, are usually carried out the perfusion of selectivity brain simultaneously; In the coronary artery bypass grafting, need conventional expansion grafting vessel,,, check simultaneously to have or not side shoot to leak blood with to vasospasm as great saphenous vein, radial artery, IMA and other blood vessel graft.Under the above-mentioned situation, all injection pressure or expansion pressure must be limited in the reasonable levels effectively.Injection pressure is too high, not only can cause patient's heart, cerebral hyperpefusion, and the lighter damages its function, and weight person will cause death; And too high expansion pressure can be damaged blood vessel graft endothelium 26S Proteasome Structure and Function, causes the common rate of grafting vessel to descend, and reduces the therapeutic effect of bypass surgery.

Conventional clinically at present method is an applying pressure table monitoring injection pressure.Because distance is far away between Pressure gauge and perfused tissue, usually can not accurately reflect the injection pressure situation.In addition, when some special circumstances occurring, when causing injection pressure to increase suddenly, Pressure gauge does not possess from advocating peace automatic decompression yet.What is more important in the arteria coronaria bypass graft, does not still have any efficient apparatus, is used to monitor and limit the pressure of expansion grafting vessel material.Bibliographical information and our measured result show, the expansion pressure of great saphenous vein is all above 300mmHg clinically, general (Hassel J about 500～600mmHg, GraedelE, Hoffer H, et al. Morphological studies in saphenous vein grafs foraortocoronary bypass surgery.Part II.Thorac Cardiovasc Surg.1981; 29:38-40).As everyone knows, human blood pressure generally can not surpass 150mmHg (systolic pressure), only in particular cases just can reach 200mmHg at the utmost point.When great saphenous vein expansion pressure during greater than 300mmHg, with the structure of grievous injury venous endothelial (Sayers RD not only, Watt PA, Muller-S, et al.Structural and functional smooth muscle injury after surgicalpreparation of reversed and non-reversed saphenous vein bypass grafts.Br J Surg 1991; 78:1256-1258) and function (Chester AH, Buttery LD, BorlandJA, et al.Structural, biochemical and functional effects of distendingpressure in the human saphenous vein:implications for bypass grafting.Coronary Artery Disease.1998; 9:143-151), and can reduce nearly long-term patency rate (the Mastroroberto P of grafting vessel, Frati G, Patti G, et al.Pressure distensionstimulates the expression of endothelial adhesion molecules in thehuman saphenous vein graft.Ann Thorac Surg.2003; 76:453-458).Therefore, how to avoid too high expansion pressure effectively, the blood vessel graft patency rate is had a negative impact, become present problem demanding prompt solution.

Summary of the invention

The purpose of this utility model provides a kind of can effectively the solution when cardiovascular surgery is treated, injection pressure or expansion pressure are limited in the reasonable levels effectively, effectively avoid because of too high expansion pressure has a negative impact to the blood vessel graft patency rate, but expansion of the blood vessel graft of volitional check pressure and cardiovascular device for casting.

Device of the present utility model comprises pipeline, three-way valve, depressurised side valve and spring, and its connection relationship is:

First pipeline, 6, one ends areliquid inlet 1, and the other end is aliquid outlet 3; In the stage casing offirst pipeline 6opening 7 is arranged, vertical one second pipeline 6 ' that links at opening 7 places; And first pipeline communicates with second pipeline;

First pipeline infirst pipeline 6 and second pipeline, 6 ' intersection is equipped with a three-way valve 2 for 6 li, junction atfirst pipeline 6 and second pipeline 6 ' has capitate top to bump formula depressurised side valve 4, and bumping formula depressurised side valve 4 rear sides on the capitate top has a pressure-controlingspring 5; Pressure-controlingspring 5 is fixed on the port of export inboard of second pipeline 6 '.

Described three-way valve 2 is columniform valves, by the swivel tee valve, can adjust that each pipeline communicates or obstructed.

The material of described pipeline is a medical grade plastic materials.

During application, this device is connected between perfusion pipeline or vasodilation syringe needle and charge pump or the syringe; When the function knob is transferred to the pressure limiting function, need not any optional equipment, this device can be limited in expansion pressure or injection pressure in the reasonable level automatically, and the pressure control scope is between 50～500mmHg.When pressure surpasses the setting level, pressure loading valve will be opened decompression (accompanying drawing 2) automatically; After pressure was reduced to reasonable level, valve can be shut (accompanying drawing 1) automatically; When not wanting to use pressure limiting device, function selecting key can be transferred to pass (accompanying drawing 3).

This utility model can significantly reduce all kinds of because injection pressure or expansion pressure due to too high histoorgan or the damage of blood vessel graft, the preparation process that makes clinical coronary artery bypass grafting material is science more.Thereby improve the safety of cardiac surgery operation, reduce operation risk, reduce postoperative complication, reduce and avoid cardiovascular accident that the blood vessel graft restenosis caused and the possibility of performing the operation once more, improve the cardiac surgery operation therapeutic effect, and then improve the treatment level of Cardiac Surgery.

When preparing the bridge blood vessel material clinically at present, still conventional expansion grafting vessel (as great saphenous vein, radial artery etc.) with to vasospasm, is checked to have or not side shoot to leak blood simultaneously.Bibliographical information and the design people's measured result shows that the expansion pressure of great saphenous vein is all above 300mmHg, generally about 600mmHg.Owing to there is not suitable pressure limiting device, usually cause the grafting vessel endothelial injury, influence the blood vessel graft patency rate.For this reason, utilize this utility model when clinical preparation bridge blood vessel material, conventional this device of using makes this operation more scientific.

Description of drawings

Fig. 1. the working state schematic representation of this utility model perfusion pressure in range of set value the time;

Fig. 2. this utility model perfusion pressure greater than the setting value after, pressure loading valve open mode sketch map;

Fig. 3. when this utility model central authorities valve transfers to off status, the depressurized system sketch map that quits work.

Reference numeral

1. enter themouth 2. three-way valves, 3. pipeline liquids outlet of pipeline liquid

4.depressurised side valve 5. pressure-controlingsprings 6,6 '. pipeline

7. opening

The specific embodiment

Implement sharp 1.

See also Fig. 1.Main body is that 2.5cm is long, first (level) plastic conduit of diameter 8mm, and its right-hand member isliquid inlet 1, left end is aliquid outlet 3; In the stage casing of horizontal pipe, other has a 1.5cm long, and second (vertically) plastic conduit of diameter 8mm is attached thereto knot and communicates; One cylindrical threelinks valve 2 is installed in the horizontal pipe of the intersection of horizontal pipe and vertical pipe,, can be adjusted that each pipeline communicates or obstructed by the swivel tee valve; At the nearly horizontal pipe end of vertical pipe, there is capitate top to bump formula valve 4, be pressure-controlingspring 5 at its rear side; Pressure-controling spring is fixed on the port of export inboard of vertical pipe.

When expanding great saphenous vein clinically, great saphenous vein one end is linked to each other with the expansion syringe needle, expand the vein of spasm by syringe vasopressing injection saline.This device is connected between vasodilation syringe needle and the syringe, threeway is transferred to the position that each pipeline all communicates, see accompanying drawing 1.In the process that increases expansion pressure gradually, if syringe institute plus-pressure in range of set value with interior (about 200mmHg), the pressure loading valve in the vertical pipe will be in closed condition all the time.If but expansion pressure surpasses setting value, the top in the vertical pipe is bumped the formula valve and will upwards be pushed away, and pressure loading valve is opened, and begins decompression, sees accompanying drawing 2.In like manner, reduce to setting value with after interior when expansion pressure, pressure loading valve can be shut automatically.If do not want to use depressurized system, the vertical openings of threeway can be transferred to the opposite direction of vertical pipe, only keep horizontal pipe unobstructed, see accompanyingdrawing 3.

Claims (5)

1. but expansion of the blood vessel graft of a volitional check pressure and cardiovascular device for casting comprise pipeline, three-way valve, depressurised side valve and spring; It is characterized in that:

First pipeline (6), an end are liquid inlet (1), and the other end is liquid outlet (3); In the stage casing of first pipeline (6) opening (7) is arranged, locate to link second pipeline (6 ') at opening (7); And first pipeline communicates with second pipeline;

First pipeline (6) lining in first pipeline (6) and second pipeline (the 6 ') intersection is equipped with a three-way valve (2), junction at first pipeline (6) and second pipeline (6 ') has a depressurised side valve (4), at depressurised side valve (4) rear side one pressure-controling spring (5) is arranged.

2. device as claimed in claim 1 is characterized in that: described pressure-controling spring (5) is fixed on the port of export inboard of second pipeline (6 ').

3. device as claimed in claim 1 is characterized in that: described three-way valve (2) is a columniform valve.

4. device as claimed in claim 1 is characterized in that: described first pipeline is vertical binding with the binding of second pipeline.

5. device as claimed in claim 1 is characterized in that: described depressurised side valve (4) is that formula depressurised side valve is bumped on the capitate top.

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