Choyimira chachipatala chokhala ndi mphamvu zitatu ndi chipangizo chomwe chimagwiritsidwa ntchito poyang'anira kayendedwe ka madzi kapena mpweya.Zapangidwa kuti zigwirizane ndi mizere itatu yosiyana kapena machubu ndi kulola kupatutsidwa kapena kuphatikizika kwa kayendedwe kameneka.Stopcock nthawi zambiri imakhala ndi thupi lapakati lomwe lili ndi madoko atatu kapena zotseguka, zomwe zili ndi valve kapena lever.Mwa kutembenuza ma valve, opereka chithandizo chamankhwala amatha kulamulira kutuluka kwa madzi kapena mpweya kudzera mu stopcock.Chidachi chimagwiritsidwa ntchito kawirikawiri pazochitika zachipatala pamene mizere yambiri iyenera kulumikizidwa kapena kuyendetsedwa, monga panthawi ya opaleshoni, mitsempha ya mitsempha kapena venous catheterizations, kapena m'malo osamalira odwala mwakayakaya.Zimathandiza akatswiri azaumoyo kuti azilamulira mbali ndi kulowetsedwa, kapena kusunga, kutengera zosowa zenizeni za wodwalayo. Pazochitika zomwe kupanikizika kwakukulu kumakhudzidwa.Ponseponse, chithandizo chamankhwala chothamanga kwambiri katatu ndi chida chamtengo wapatali chomwe chimathandiza opereka chithandizo chamankhwala kuti aziyendetsa bwino ndikuwongolera kutuluka kwa madzi kapena gasi m'njira zachipatala, kulimbikitsa chitetezo cha odwala ndi kupereka chisamaliro choyenera.
