Intramedullary ntsia thawv yog ib qho kev phais implantused los kho fractures ntawm cov pob txha ntev, xws li lub femur (thigh pob txha) thiab tibia (shinbone). Nws yog ib tug ntev, hlau pas nrig uas yog ntxig rau hauv qhov chaw hollow ntawm cov pob txha (medullary kwj dej), muab kev txhawb nqa sab hauv thiab ruaj khov rau cov pob txha tawg.feem ntau siv nyob rau hauv cov ntaub ntawv ntawm compleXfractures los yog thaum kho sab nraud tsis haum.Lawv tuaj yeem pab txhawb kev kho mob thiab txo cov kev pheej hmoo ntawm cov teeb meem, xws li nonunion lossis malunion.