Considering biological features

Considering biological features of a valval aperture of heart, colchicine extreme properties of circles to which d-squares come nearer at augmentation of number of their parties, errors at the calculations, depending on imperfection calculation systems, it is admissible factor 1,72 to approximate to 1,50. However if the length of perimetre of an aperture is expressed by number, not multiple cheap colchicine five division, squaring and multiplication colchicine to fractional number 1,50 to make in mind inconveniently, the paper and a pencil, the assistant and time is required. Therefore colchicine it is necessary to simplify calculations. Let's notice, that with augmentation of number of the parties of a polygon, i.e. Reduction of their length, the factor increases (tab. 1) see, and the area comes nearer to the circle area. If number of the parties of the accepted n-square to enlarge twice, having transformed it in a 2n-square, i.e. In a 10-square to divide perimetre not on 5, and on 10, that is easier and easier, the factor needs to be quadrupled it: colchicine Then to multiply it is necessary on six whole, instead of on fractional number. It will be easier and closer to the valid area of a valval aperture that will be compounded with results of the same method of variation statistics, but with the areas not than rings, and polygons where the colchicine, and/n=yo0,43.
Then the area of a normal mitral orifice is defined in colchicine So, on its perimetre it is necessary for definition of the area of the given valval aperture of heart: 1) in advance measured own fingers, touch to define length of perimetre of an aperture colchicine the received length of perimetre (to part on 10, I.e. To define length of the party of a 10-square 3) received private from division a square And 4) the received size to increase by factor colchicine. Using this formula, it is possible without special work and even in mind with enough approached accuracy to calculate the area of any valval aperture of heart on its perimetre. The areas of all normal valval apertures of heart calculated thus on the offered formula are presented to tab. 2. Correctness of parities of the calculated areas can be checked up a proportion, having based on judgements a principle of a continuity of a circulation: the area of the right atrioventricular ultracet aperture should so to concern the area of an aperture of a pulmonary artery as the area left atrioventricular concerns the aperture area : this Proportions product to product of averages, so, the proportion is correct. Here it is found out, that in norm the area of each atrioventricular aperture in 2 times is more than area of an aperture of a corresponding vessel, . the mitral orifice area in 2 times is more than area aortal, and the area an aperture in 2 times is more than area of an aperture of a pulmonary artery. From this follows, as power of a right ventricle in norm 51 1 Where: With - perimetres of apertures; To - length of the parties of ten-squares; R - radius described yokes - radius entered circles; Z - width of rings in millimetres. In 2 times there is more than power of the right auricle, and colchicine power of a left ventricle in 2 times is more than power of the left auricle. Applying the offered formula, the pathologist on opening, and the surgeon during operation komissuroto-mii can easily calculate the area of any valval aperture of heart. As it is made by a finger any additional manipulations it is not required. Method of separate weighing of heart After opening and research of heart it separate from large vessels and weigh. This weighing is not exact enough for definition of its hypertrophy, in particular at an idiopathic hypertensia. Therefore the method of separate weighing of heart by which the absolute and relative colchicine weight of muscles of a left ventricle is rather precisely defined is recommended. 152 This method has been offered by V.Muller in 1883 and G.I.Ilinym in 1956 is in detail enough described and specified Heart release from Adeps, own vessels, valves and part on four parts: both auricles with their septum separate on atrial-zheludochko-howl to a sulcus, separate walls of ventricles from their septum. Receive 4 parts: 1) both auricles together with their septum, 2) a left ventricle, 3) a right ventricle and 4) an interventricular septum. If heart has been opened how it is described on p. 132-140, that is it is necessary to separate only heart colchicine from an aorta and a pulmonary artery and on a lredserdno-ventricular sulcus to separate auricles with their septum. If heart has been opened by other method it is necessary to cut off ventricles parts, that will complicate all operation, and without that labour-consuming enough a little, moreover colchicine will frame danger to mix separate pieces of ventricles. When separation of heart into four parts is finished, weigh each part separately and there and then the assistant writes down weight of each part. The interventricular septum contains muscles both right, and left colchicine ventricles. It is necessary to part proportionally therefore septum weight between ventricles. For this purpose the number of grammes of weight of a septum needs to be parted on number colchicine of grammes of weight of both ventricles together. By it it will be defined, what part of grammes of a septum is necessary on one gramme of the general muscular mass of both ventricles. Further received private from division multiply by number of grammes of each ventricle separately. The received products also are expression of proportional separation of weight of a septum between ventricles, they need to be added accordingly to weight of each ventricle. Weight of a part of the interventricular septum belonging to a right ventricle, it is possible to receive also, having subtracted the weight received for a left ventricle from gross weight of all septum.