scholarly journals FP572PREDICTION OF VASCULAR ACCESS STENOSIS: BLOOD TEMPERATURE MONITORING WITH TWISTER VS STATIC INTRA-ACCESS PRESSURE RATIO

2018 ◽  
Vol 33 (suppl_1) ◽  
pp. i233-i233
Author(s):  
Yoo Jin Choi ◽  
Young-Ki Lee ◽  
Ajin Cho ◽  
Eun Yi Kim ◽  
Sun Ryoung Choi ◽  
...  
Keyword(s):  
Vascular Access ◽  
Pressure Ratio ◽  
Temperature Monitoring ◽  
Blood Temperature ◽  
Vascular Access Stenosis

scholarly journals Prediction of vascular access stenosis: Blood temperature monitoring with the Twister versus static intra-access pressure ratio

PLoS ONE ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. e0204630 ◽  
Author(s):  
Yoo Jin Choi ◽  
Young-Ki Lee ◽  
Hayne Cho Park ◽  
Eun Yi Kim ◽  
Ajin Cho ◽  
...  
Keyword(s):  
Vascular Access ◽  
Pressure Ratio ◽  
Temperature Monitoring ◽  
Blood Temperature ◽  
Vascular Access Stenosis

Blood temperature monitoring–guided vascular access intervention improved dialysis adequacy

2020 ◽  
pp. 112972982094903
Author(s):  
Seung Don Baek ◽  
Soomin Jeung ◽  
Jin Go ◽  
Jae-Young Kang
Keyword(s):  
Vascular Access ◽  
Reference Point ◽  
Temperature Monitoring ◽  
Artificial Kidney ◽  
Dialysis Adequacy ◽  
Vascular Intervention ◽  
Flow Rates ◽  
Blood Temperature ◽  
Before And After ◽  
The Mean

Objectives: The aim of this study was to investigate whether blood temperature monitoring–guided vascular access intervention could improve dialysis adequacy. Methods: We retrospectively evaluated all patients who received outpatient-based prevalent hemodialysis patients ( n = 84) in our artificial kidney room between January 2019 and October 2019. Through blood temperature monitoring, access blood flow was calculated every month and Kt/ V was calculated every 3 months. The reference point was set at the time of vascular intervention in the patients ( n = 27) who underwent intervention or at the middle of the study period in patients ( n = 57) who did not undergo intervention. The mean blood temperature monitoring–estimated access flow and Kt/ V before and after the reference point were calculated and compared. Results: Among 84 patients, 30 (35.7%) showed access flow rates of <500 mL/min, calculated by blood temperature monitoring during the study period. Twenty-seven patients (32.1%) underwent vascular intervention, of whom 24 (28.6%) showed access flow rates of <500 mL/min, 2 (2.4%) showed weak bruit or thrill incapable of needling, and 1 (1.2%) presented acute occlusion. Six patients (7.1%) whose access flow rates were <500 mL/min refused to undergo intervention. All angiographies in the patients whose access flow rates were <500 mL/min who underwent intervention showed a significant stenosis. The mean change in blood temperature monitoring–estimated access flow and Kt/ V before and after vascular intervention was 483.3 ± 490.6 and 0.19 ± 0.21, respectively, which showed significant differences (all p < 0.05). A weak positive correlation between the mean change in blood temperature monitoring–estimated access flow and Kt/ V was shown in all study patients by Pearson’s correlation analysis ( r = 0.234, p = 0.033). Conclusion: Access flow estimation by blood temperature monitoring might identify candidates who require vascular intervention. Blood temperature monitoring–guided vascular intervention significantly improved access flow and dialysis adequacy.

Comparison of urea recirculation and thermodilution for monitoring of vascular access in patients undergoing hemodialysis

2018 ◽  
Vol 19 (3) ◽  
pp. 283-290 ◽  
Author(s):  
Almudena Vega ◽  
Soraya Abad ◽  
Inés Aragoncillo ◽  
Isabel Galán ◽  
Nicolás Macías ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Vascular Access ◽  
Operating Characteristic ◽  
Temperature Monitoring ◽  
Hemodialysis Access ◽  
Receiver Operating Characteristic Curves ◽  
Blood Temperature ◽  
A Value ◽  
Kaplan Meier

Introduction It is important to monitor vascular access in patients with stage 5 chronic kidney disease receiving hemodialysis. Access recirculation can help to detect a need for intervention. Objectives: To compare urea recirculation with recirculation by thermodilution using blood temperature monitoring to predict a need for intervention of vascular access over a 6-month period. Methods: We analyzed urea recirculation and blood temperature monitoring simultaneously in 61 patients undergoing hemodialysis. During the 6-month follow-up, we recorded all cases of angioplasty or surgery (thrombectomy or reanastomosis). In line with previous studies, we considered a value to be positive when urea recirculation was >10% and blood temperature monitoring >15%. Receiver operating characteristic curves were constructed. Results: Mean urea recirculation was 9.5% ± 6.6% and mean blood temperature monitoring 12.9% ± 4.3% (p = 0.001). Urea recirculation >10% had a sensitivity of 80% and specificity of 78%. Blood temperature monitoring >15% had a sensitivity of 33% and specificity of 85%. During follow-up, 25% of patients developed need for intervention of vascular access. We found an association between vascular access dysfunction and urea recirculation. The Kaplan–Meier analysis confirmed an association between urea recirculation and risk of vascular access dysfunction (log rank = 17.2; p = 0.001). We were unable to confirm this association with blood temperature monitoring (log rank = 0.879; p = 0.656). Conclusion: Urea recirculation is better predictor of vascular access dysfunction than thermodilution.

Determination of Vascular Access Stenosis Location and Severity by Multi-domain Analysis of Blood Sounds

2021 ◽  
pp. 161-194
Author(s):  
Steve J. A. Majerus ◽  
Rohan Sinha ◽  
Binit Panda ◽  
Hossein Miri Lavasani
Keyword(s):  
Vascular Access ◽  
Domain Analysis ◽  
Vascular Access Stenosis

Standard Procedures of Endovascular Treatment for Vascular Access Stenosis in our Facility – Clinical Usefulness of Ultrasonography

2015 ◽  
Vol 16 (10_suppl) ◽  
pp. S34-S37 ◽  
Author(s):  
Takashi Sato ◽  
Masato Tsuboi ◽  
Takeshi Onogi ◽  
Naofumi Miwa ◽  
Hiroshi Sakurai ◽  
...  
Keyword(s):  
Endovascular Treatment ◽  
Vascular Access ◽  
Clinical Usefulness ◽  
Standard Procedures ◽  
Vascular Access Stenosis

Five Years of Vascular Access Stenosis Surveillance by Blood Flow Rate Measurements during Hemodialysis Using the Delta-H Method

2012 ◽  
Vol 13 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Ramón Roca-Tey ◽  
Rosa Samon ◽  
Omar Ibrik ◽  
Empar Roda ◽  
Juan Carlos González-Oliva ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Rate ◽  
Vascular Access ◽  
Blood Flow Rate ◽  
Vascular Access Stenosis

scholarly journals P1311IMPORTANCE OF FISTULA POSITION FOR DETECTING STENOSIS WITH VASCULAR ACCESS BLOOD FLOW MEASUREMENT

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Csaba Rikker ◽  
Edina Juhász ◽  
Renáta Gáspár ◽  
Maria Haraszti ◽  
Bálint Rikker ◽  
...  
Keyword(s):  
Blood Flow ◽  
Vascular Access ◽  
False Negative ◽  
Clinical Signs ◽  
Blood Flow Rate ◽  
Transluminal Angioplasty ◽  
Chronic Hemodialysis ◽  
Roc Curve Analysis ◽  
True Negative ◽  
Blood Temperature

Abstract Background and Aims Surveillance of vascular access function in patients on chronic hemodialysis (HD) by measuring the access blood flow rate (Qa) is a widely accepted method for early detection of dysfunction. Qa threshold can be lower in the more distal accesses than in the more proximal accesses. However, cut-off values of Qa in different access positions have not yet been established. The aim of our study is to determine the critical values of Qa indicative of stenosis in different access sites. Method Between July 2012 and July 2019, we performed 5798 Qa measurements of native arteriovenous fistulas (AVFs) (wrist [w]: 2932, forearm [fa]: 2035 and elbow/upper arm [e/ua]: 731) in 242 chronic HD patients using Fresenius 5008 and 5008 S blood temperature monitors (BTMs) at the beginning of HD sessions. As reference we performed 512 colour duplex ultrasonographies (CDUSs) and 205 angiographies (ANGs). CDUS was performed as surveillance method independently from the BTM, or at the presence of low Qa and/or clinical signs of access failure. ANG was performed only in CDUS positive cases or at clinical signs of access failure. We performed percutaneous transluminal angioplasty (PTA) in 174 cases and stent implantation in 2 cases. New AVFs were created in 25 cases. The results were evaluated retrospectively according to access positions using Receiver Operating Characteristic (ROC) curve analysis. Results The number of true positive (TP), true negative (TN), false positive (FP), false negative (FN) cases, sensitivity (SENS) and specificity (SPEC) in different AVF sites and Qas are summarised in table below. Conclusion In order to prevent the fistula occlusion, the cut-off Qas can be different in various access positions. Based on our results we suggest 600-650 mL/min for w AVFs, 650-700 mL/min for fa AVFs and 750-800 mL/min for e/ua AVFs as cut-off values.

Comparaison des mesures des débits d’abords vasculaires pour hémodialyse obtenues par méthode de thermodilution utilisant le module Blood Temperature Monitoring et par débimétrie doppler

2012 ◽  
Vol 8 (2) ◽  
pp. 96-100 ◽  
Author(s):  
Mathieu Sacquépée ◽  
Jean-Michel Tivollier ◽  
Yves Doussy ◽  
Nicolas Quirin ◽  
Jean-Claude Valéry ◽  
...  
Keyword(s):  
Temperature Monitoring ◽  
Blood Temperature
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