Icatheter yomchamo yityhubhu efakwa esinyini ngombhobho we-urethra ukukhupha umchamo.Emva kokuba i-catheter ifakwe kwi-bladder, kukho ibhaluni kufuphi nentloko ye-catheter ukulungisa i-catheter Umbhobho uhlala kwi-bladder kwaye akulula ukuphuma, kwaye ityhubhu yokukhupha idibaniswe kwingxowa yomchamo ukuqokelela umchamo. .Ngokwe-matrial engafaniyo, i-catheter yomchamo inokwahlulwa ibe yicatheter yerabha yendalo, i-silicone yerabha yerabha okanye i-polyvinyl chloride catheter (i-PVC catheter).