In certain medical procedures it is likewise important to "stop" the heart (to maintain a strategic distance from that can). This occurs in those medical procedures where the left heart pits are opened and in those in which the correct cavities open, however there are interchanges with the left pits.
In these conditions (open pits and thumping heart) there is a hazard that air can enter the coronary veins or cerebral conduits; these air pockets can cause a myocardial or cerebral localized necrosis perioperatorio by embolism. It is likewise hard to complete surgical techniques on a pulsating heart and blood. The brace in the aorta and venae cavae (both in green shading)) counteracts the entry of air embolism and gives a "still" surgical field without blood, encouraging crafted by the specialist.
With the aorta cinched and following the unrivaled vivified conspire, the heart does not pulsate and the blood does not achieve the coronaries and the heart itself because it is anticipated by the aortic clip. The non-oxygenated blood (blue) that profits to the heart through the venae cavae (CAVA) is constrained with a clip in the cava to be totally occupied through extraordinary plastic tubes to the extracorporeal machine (siphon),
where it is oxygenated , warmed or cooled, separated and, right now oxygenated, (red shading) is sent back compelled to the aorta (Ao) of the patient, from which it is disseminated all through the body, particularly by the Central Nervous System (CNS) ) and the kidney.
The heart and lungs are bloodless and without movement, confined between two families (groups An and B). Unavoidably, some blood dependably goes through optional and guarantee vessels (CSC) to the heart, originating from parts of the aorta.
In extracorporeal circulation with cardioplegia
The aortic brace keeps blood from achieving the coronary framework and the heart. Be that as it may, the cardiovascular bulk or myocardium additionally needs oxygenated blood to keep up itself and have the option to thump unequivocally after the task;
If the activity endures quite a while and the heart does not get blood through the coronary supply routes, the myocardium can irreversibly deteriorate in its contractile capacity, causing the passing of the tyke toward the finish of the task and the extracorporeal circulation being pulled back.
Cardioplegia is a substance arrangement that is infused occasionally during the activity in the proximal aorta, giving 1) the nonappearance of heartbeat (thus the name of cardioplegia) and 2) hypothermia, since the cardioplegia is infused freezing. The two things definitely lessen the requirement for metabolic vitality utilization by the heart,
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Extracorporeal circulation isn't as immaculate as human circulation and some primary organ could be harmed. To stay away from this, particularly in youthful youngsters, the tyke is cooled (moderate or profound hypothermia), additionally cooling the blood as it goes through the machine to give the principle organs a general security and/or to decrease the progression of the machine at specific minutes in which the blood that profits to the heart by guarantees will obscure the employable field. The virus makes the human organs increasingly safe shielding them from absence of blood, so it drags out the wellbeing time so we can operate with quietness and exactness.
In the circulation stop or circulatory stop
In little youngsters and/or in extremely complex adjustments, the extracorporeal circulation machine is quit, leaving the heart and machine halted, as demonstrated by the upper circulatory plan. The circulatory stop permits an increasingly satisfactory surgical redress with no blood and without stopping up cannulas .
Consistently, to guarantee that no organ is harmed by being without blood stream for some time, the tyke is recently cooled to 15-18 ºC rectal (profound hypothermia). At this temperature, the principle organs might be without blood and without harm for quite a while, which is important to address the coronary illness well.
Anticoagulation
Extracorporeal circulation requires the blood to be anticoagulated with heparin so thrombi don't frame in contact with the tubes that travel every which way
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