Чупров Александр Дмитриевич (RU),Гаврилова Ирина Александровна (RU)
申请号：
RU2012153114/14
公开号：
RU00128993U1
申请日:
2012.12.07
申请国别(地区):
RU
年份:
2013
代理人:
摘要：
The invention relates to the field of ophthalmic surgery.There is a prototype - the valve Ahmed, presented at the companys official website. Positioned that this valve the liquid passes in one direction, the bandwidth depends on the pressure under which the liquid flows. The operation of this valve is based is that it contains a double membrane made of thin elastomeric when the pressure in the front chamber is higher than 10 mm Hg, the valve opening. A disadvantage of the valve is that due to scarring of the filtration zone in the late postoperative period, filtering the aqueous humor reduces, or stops.The technical problem - to create a valve for glaucoma surgery, which besides the function of the valve (when the degree of filtering depends on the intraocular fluid intraocular pressure levels) will reduce the risk of scarring in the area of the surgical fistula.Solution of the technical problem consists in the fact that all the valve body is a semipermeable membrane and is divided into several chambers, potentially interconnected. With an increase in intraocular pressure above a certain level there is a "bowing" of the membrane and opens the next camera, etc. Because the valve body consists of a semipermeable membrane ensuring the filtration of fluid only in the direction "from the valve" filtering the aqueous humor is performed across the surface of the open valve chambers. Therefore, the higher the intraocular pressure, the greater the valve chambers is involved, and accordingly, the greater the filtering intraocular fluid valve. Thus, the area of the filtration zone of the valve is considerably greater than that of Ahmed valve, which reduces the risk of scarring. The utility model is illustrated by drawings.Working with the utility model is made according to the following procedure. After the usual preoperative preparation and local anesthesia is performed conjunctival incision of 10 mm from the limbus in the upper-outer or upper-inner quadrant between the p
