Kalmar "pelvimeter" tana nufin wani kayan aiki ko na'ura na likitanci da ake amfani da su don auna girma da girman ƙashin ƙugu, wanda shine tsarin ƙashin da ke gindin kashin baya kuma yana haɗa da hips. Ana amfani da ƙashin ƙashin ƙugu a fannin kula da mata masu juna biyu da mata don tantance girman ƙashin mahaifar mace mai ciki, don sanin cancantar ƙashin ƙugu don haihuwa, ko kuma don tantancewa da kuma magance wasu matsalolin pelvic. Na'urar yawanci tana ƙunshi nau'i biyu masu lanƙwasa ko hannaye waɗanda za'a iya daidaita su don dacewa da ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙashin ƙanƙara.