Abstract
Objective To study the effect of temporary closure of venous pressure clamp on blood coagulation during duct rinsing in heparin free dialysis. Methods One hundred and forty cases of heparin free dialysis were divided into the control group and observation group according to the singular times dialysis and dual time dialysis, the control group (74 cases with singular times heparin free dialysis) and observation group (66 cases with dual times heparin free dialysis). The rinsing operation of the control group was consistent with the routine dialysis process.In the observation group, the venous pressure clamp was closed before the start of rinsing, and then the venous pressure clamp was opened at the end of this process.The times of alarm, blood pump suspension period, incidence rate and degree of blood coagulation were compared between the two groups to assess the degree of comfort and compliance of all patients during the process. Results The differences between the two groups in terms of times of alarm and blood pump suspension period were statistically significant ( (5.7±1.8) times vs.0 times, (9.1±4.0) s vs.0s, P=0.001), the incidence rate of blood coagulation, the degree of blood coagulation above degree Ⅱ and the rate of operation completion ahead of time in the two groups were detected ( (70.3% (52/74) vs.7.6% (5/66), 21.6% (16/74) vs.0, 8.1% (6/74) vs.0). The difference of blood coagulation degree between the two groups was statistically significant (Z=-9.185, P=0.000). Patients in the observation group had a higher grade of comfort degree( (4.8±1.0) points vs.(4.2±0.63) points, P=0.001). Conclusion In the operation of heparin free dialysis, the temporary closure of venous pressure clamp can reduce the incidence rate of interruption, prolong the service life of the filter, ensures the dialysis time and treatment effect, and improve the patients’ degree of comfort. Key words: Venous pressure tube clamp; Heparin free dialysis; Rinsing; Blood coagulation; Degree of comfort
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