▁foreign ▁body ▁within ▁the ▁vas cul ature . ▁For ▁patients ▁with ▁central ▁ven ous ▁access , ▁a ▁wide ▁variation ▁in ▁the ▁inc idence ▁of ▁ve in ▁th rom b osis ▁( 1 ▁to ▁ 6 6 ▁percent ) ▁is ▁reported ▁and ▁the ▁inc idence ▁depends ▁upon ▁the ▁c ath eter ▁type ▁and ▁location , ▁criteria ▁for ▁diagn osis , ▁and ▁population ▁studied ▁ ▁M isp lacement ▁ ▁C VC ▁mis p lacement ▁is ▁more ▁common ▁when ▁the ▁an atom y ▁of ▁the ▁person ▁is ▁different ▁or ▁difficult ▁due ▁to ▁injury ▁or ▁past ▁surg ery . ▁C VC s ▁can ▁be ▁mistaken ly ▁placed ▁in ▁an ▁ar tery ▁during ▁insert ion ▁( for ▁example , ▁the ▁car ot id ▁ar tery ▁or ▁verte br al ▁ar tery ▁when ▁placed ▁in ▁the ▁neck ▁or ▁common ▁fem oral ▁ar tery ▁when ▁placed ▁in ▁the ▁gro in ). ▁During ▁sub c lav ian ▁ve in ▁central ▁line ▁pla cement , ▁the ▁c ath eter ▁can ▁be ▁accident ally ▁pushed ▁into ▁the ▁internal ▁jug ular ▁ve in ▁on ▁the ▁same ▁side ▁instead ▁of ▁the ▁superior ▁v ena ▁c ava . ▁A ▁ch est ▁x - ray ▁is ▁performed ▁after ▁insert ion ▁to ▁rule ▁out ▁this ▁possibility . ▁The ▁tip ▁of ▁the ▁c ath eter ▁can ▁also ▁be ▁mis direct ed ▁into ▁the ▁contr al ater al ▁( opp os ite ▁side ) ▁sub c lav ian ▁ve in ▁in ▁the ▁neck , ▁rather ▁than ▁into ▁the ▁superior ▁v ena ▁c ava . ▁The ▁risk ▁of ▁mis p lacement