Correlación entre el flujo de la fístula arterio-venosa con el flujo extracorpóreo. Hospital José Carrasco Arteaga, Cuenca 2016.

Abstract

Correlation between Access Blood Flow and Extracorporeal Flow. Introduction: Access Blood Flow (Qa) measurement is a patient hemodialysis care recommendation. The aim of this study was to determine whether extracorporeal flow (Qb) is in correlation on Qa in patients undergoing hemodialysis. Methods: This is a correlation study. Measurements were performed since September 29, 2016 to January 30, 2017 in the hemodialysis center of “José Carrasco Arteaga” Hospital. Cuenca-Ecuador. Sample calculation was 41 cases. We included chronic renal failure patients over 17 years old with arteriovenous fistula. Participants signed informed consent. This study was approved by Universidad San Francisco de Quito ethics committee. The variables were population descriptive, Qa and Qb. Qa measurement was performed with a Transonic (r) monitor. Qb measurement was performed with following pressures in arterial line: -60, -100, -160 and -200 mmHg. Spearman Coeficient correlation between Qa, and Qb standardized to a Dynamic Arterial Line Pressure (DALP). SPSS 22.0 was used statistics analysis. The hypothesis was rxy ≠ 0. Results: A total of 57 patients, age 62.9 ± 12.7 years, with 29.4 ± 33 months on hemodialysis participated in the study. 23 women (40.3%). (45.6%) had Diabetic Nephropathy. The presence of fistulas were 40 cases in the upper left limb (70.2%) and 17 (29.8%) in the upper right limb. The prevalence of aneurysms was 10.5%. In the studied group the 50th percentile of Qb was 415 mL / min with a DALP of -200 mmHg. The average access flow was 1516 ± 878 ml / min. The correlation between Qb and Qa is statistically more significant when DALP was -200 mmHg. The association has a coefficient Rs = 0.643 (IC 0.453 to 0.771) P <0.0001. The estimated flow of the access Qae = (pump Qb DALP -200 mmHg (mL / min) * 16.63) - 5449.71. Conclusion: The research hypothesis is accepted since the relationship between Qa and Qb is greater than zero with a statistically significant value