The patients having received CABG are more likely to suffer from cardiac dysfunction and hemodynamic instability.Floating catheter provides a full set of hemodynamic parameters in an accurate manner.Methods From January 6,2018,to December 29,2018,101 patients receiving CABG in our department were selected.Among them,53 patients indwelt with Swan-Ganz balloon floating catheters.The correct application of indwelling Swan-Ganz balloon floating catheter was analyzed targeting 53 patients receiving CABG to standardize nursing and prevent complications.Results Of the 53 patients recruited,48 cases recovered,3 cases had clinical death,and 2 cases were automatically discharged.There are 16 cases subject to complications and adverse reactions.In 4 cases with catheter obstruction in SICU where CVP could be measured,floating catheters were removed in time within 24 hours after catheterization in 3 cases and ld22h in 1 case.In 2 cases,catheter obstruction happened in SICU after CO measurement and before CVP measurement,where catheter obstruction was observed ld8h after catheterization,and floating catheters were removed within 2d22h in all cases.There were 3 cases who had capillary hemorrhage at puncture sites,where compression hemostasis with cigarette coils and gauze blocks was performed in all cases,followed by 3M TegadermTM transparent film dressing for sterile covering at the puncture site.4 cases suffered from transient premature ventricular contraction (PVC),which was alleviated without malignant arrhythmia after immediate suspension of operation.In addition,2 cases were subject to balloon catheters in the right ventricle and 1 case had balloon catheter in pulmonary artery,where CO,CI,SVR and other values except for the pulmonary capillary wedge pressure (PCWP) could be measured in all cases.Balloon rupture,pulmonary embolism,pulmonary hemorrhage,and pulmonary artery rupture,catheter knotting and catheter rupture or phlebitis and complications of catheter-related bloodstream infection (CRBI)were not found in the 53 patients.Conclusions The application of Swan-Ganz balloon floating catheter can provide hemodynamic monitoring data and guidance for monitoring the treatment of patients receiving CABG.Scientific application and management of pulmonary artery floating catheters and effective nursing can prevent complications and adverse reactions.