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Revista de la Sociedad Española de Enfermería Nefrológica

Print version ISSN 1139-1375


COBO SANCHEZ, José Luis et al. Comparative study of flows and resistances of haemodialysis catheters using luer lock bioconnectors. Rev Soc Esp Enferm Nefrol [online]. 2010, vol.13, n.1, pp.23-28. ISSN 1139-1375.

The aim of this study is to evaluate flows and resistances when using two types of luer lock bioconnectors for haemodialysis catheters. As secondary objectives, the study seeks to evaluate the changes in the coagulation of the system, connection/disconnection time and the opinion of nursing staff on their use. Material and methods: randomized experimental study of 10 patients undergoing haemodialysis, 5 with Tego® bioconnectors (group A) and 5 with BD Q-Syte® (group B), over 12 consecutive sessions (6 with bioconnectors and 6 directly connected to the monitor). The following variables were studied: sociodemographic, type of haemodialysis technique, blood flows, venous blood pressure, Kt, KtV, coagulation of the system, time used in connecting/ disconnecting and the opinion of nursing staff. Results: The sample comprised 6 women and 4 men, with an average age of 62 and an average time on haemodialysis of 4.2 years. In group A, there were no statistically significant differences between blood flows, venous blood pressure and dialysis dose. Group B showed statistically significant differences in blood flows and venous blood pressure. There were no differences between the use of bioconnectors and direct connection to the catheter in the coagulation of the system. Connection and disconnection times were reduced in both groups. Nursing staff considered that the convenience of the use of bioconnectors was: very convenient (82%), quite convenient (9%) the same as without them (9%). Conclusions: Connection and disconnection times fall with the use of bioconnector. The Tego® bioconnector offers better blood flows and lower venous resistance.

Keywords : Haemodialysis; Central venous catheter; Luer lock bioconnector; Dialysis dose; Blood flow; Nursing.

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