A Comparative Study of The Effect of Heparinized Distilled Water and Normal Salin Solution in Preventing Venous Cannula Obstruction in Patients Admitted to CCU and Cardiology Wards of Tohid Hospital in 2001

Cardiovascular disease is one of the most common diseases in all communities. Seeondary prevention including application of all Possible facilities to prevent the disease from getting worse is of great importance. This study was performed in order to compare the effect of heparinized distilled water and normal saline solution in preventing the obstruction of venous cannula because of clott formation. This study was RCT and the population under study was two groups (n=30) of patients admitted to CCU and cardiology wards of tohid hospital that were selected randomly. Sampling was done by single blind method and information was registered in the questionnare and checklists. After removing heparin and serum and recovery of the patients their cannula were filled by solutions. Blood returning to the end of cannula was checked each 8 hours and heparin lock or saline lock was done for lateer control. The results of this study showed significant difference between two groups (P 0.05) regarding blood returning to the end of cannula. With respect to the the result of this study we cancluded that heparinized distilled water is more effective than normal saline solution in preventing venous connula obstruction.