scholarly journals Comparison of Bioimpedance Versus Pulse Contour Analysis for Intraoperative Cardiac Index Monitoring in Patients Undergoing Kidney Transplantation

2021 ◽  
Vol 11 (5) ◽  
Author(s):  
Dita Aditianingsih ◽  
Jefferson Hidayat ◽  
Vivi Medina Ginting

Background: Cardiac index (CI; cardiac output indexed to body surface area) is routinely measured during kidney transplant surgery. Bioimpedance cardiometry is a transthoracic impedance as the non-invasive alternative for hemodynamic monitoring, using semi-invasive uncalibrated pulse wave or contour (UPC) analysis. Objectives: We performed a cross-sectional observational study on 50 kidney transplant patients to compare the CI measurement agreement, concordance rate, and trending ability between bioimpedance and UPC analysis. Methods: For each patient, CI was measured by bioimpedance analysis (ICONTM) and UPC analysis (EV1000TM) devices at three time points: after induction, during incision, and at reperfusion. The device measurement accuracy was assessed by the bias value, limit of agreement (LoA), and percentage error (PE) using Bland-Altman analyses. Trending ability was assessed by angular bias and polar concordance through four-quadrant and polar plot analyses. Results: From each time point and pooled measurement, the correlation coefficients were 0.267, 0.327, 0.321, and 0.348. Bland-Altman analyses showed mean bias values of 1.18, 1.06, 1.48, and 1.30, LoA of -1.35 to 3.72, -1.39 to 3.51, -1.07 to 4.04, and -1.17 to 3.78, and PE of 82.21, 78.50, 68.74, and 74.58%, respectively. Polar plot analyses revealed angular bias values of -10.37º, -15.01º, -18.68º, and -12.62º, with radial LoA of 89.79º, 85.86º, 83.38º, and 87.82º, respectively. The four-quadrant plot concordance rates were 70.77, 67.35, 65.90, and 69.79%. These analyses showed poor agreement, weak concordance, and low trending ability of bioimpedance cardiometry to UPC analysis. Conclusions: Bioimpedance and UPC analysis for CI measurements were not interchangeable in patients undergoing kidney transplant surgery. Cardiac index monitoring using bioimpedance cardiometry during kidney transplantation should be interpreted cautiously because it showed poor reliability due to low accuracy, precision, and trending ability for CI measurement.

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
P. B. W. Cox ◽  
A. M. den Ouden ◽  
M. Theunissen ◽  
L. J. Montenij ◽  
A. G. H. Kessels ◽  
...  

Introduction. Evaluation of accuracy, precision, and trending ability of cardiac index (CI) measurements using the Aesculon™ bioimpedance electrical cardiometry (Aesc) compared to the continuous pulmonary artery thermodilution catheter (PAC) technique before, during, and after cardiac surgery. Methods. A prospective observational study with fifty patients with ASA 3-4. At six time points (T), measurements of CI simultaneously by continuous cardiac output pulmonary thermodilution and thoracic bioimpedance and standard hemodynamics were performed. Analysis was performed using Bland-Altman, four-quadrant plot, and polar plot methodology. Results. CI obtained with pulmonary artery thermodilution and thoracic bioimpedance ranged from 1.00 to 6.75 L min−1 and 0.93 to 7.25 L min−1, respectively. Bland-Altman analysis showed a bias between CIBIO and CIPAC of 0.52 liters min−1 m−2, with LOA of [−2.2; 1.1] liters min−1 m−2. Percentage error between the two techniques was above 30% at every time point. Polar plot methodology and 4-quadrant analysis showed poor trending ability. Skin incision had no effect on the results. Conclusion. CI obtained by continuous PAC and CI obtained by Aesculon bioimpedance are not interchangeable in cardiac surgical patients. No effects of skin incision were found. International clinical trial registration number is ISRCTN26732484.


2021 ◽  
Vol 15 (11) ◽  
pp. 3087-3089
Author(s):  
Rashida Jabeen ◽  
Kousar Perveen ◽  
Muhammad Afzal ◽  
Sadia Khan

Kidney transplantation is the famous and most important choice of treatment of renal replacement therapies (RRTs) because of its positive impact on morbidity, survival and cost. The health related quality of life is becoming important outcome. Quality of life is usually impaired in patients who have renal transplant because of renal transplant patients have anxiety, lack of social, physical and emotional support and diminished ability to take care of themselves. The basic purpose of renal transplantation is to achieve maximum quality of life with minimum side effects. Methods: A cross sectional study was conducted at Rukhsana Akhtar Bahria International Orchard Hospital Lahore after approval from institution board of university of Lahore. 36 patients were enrolled in study by using purposive sampling technique. After taking informed consent all Kidney transplant patients aged between 18 years to 60 years, visited the post-transplantation OPD and continuously in follow-up sessions were included in study. A validated and standard WHO questionnaire of “Kidney Disease and Quality of Life (KDQOL-36™)” was used for data collection. Data was entered and analyzed in SPSS version.21.Chi-square test was applied to find out significant association between qualitative variables. P -Value < 0.05will be considered as statistically significant. Results: Majority of patients were from 40-49 years 10(27.0%). Females were more as compared to men (20(55.6) vs 16(44.4%)). 10(27.8) patients can read and write and 8(22.2%) have done matriculation. More patients live in Urban area as compared to rural area(19(52.8%) vs 17(47.2%)).8(22.2%) patients have less than 1 year of post kidney transplantation time and 19(52.8%) have 1 to 3 years. All the seven domains of KDQOL show poor QOL. General Health, Physical function and physical and emotional function shows average QOL and Emotional, social, daily activities and overall KDQOL shows poor QOL. There was insignificant association with age, gender, education; residential area and Post kidney transplantation length of time (years)(p-value > 0.05). Conclusions: After renal transplantation HRQOL becomes very important factor. After kidney transplantation HRQOL depends on many factors. It was concluded from current study that the HRQOL was not as good as it should be. Over the period of transplantation time patient’s quality of life remain same. The society, government, family, and medical staff need to support patients so they can also improve their QOL. Key word: Renal Diseases, Kidney transplant, Quality of life, KDQOL-36


2021 ◽  
Vol 10 (2) ◽  
pp. 213
Author(s):  
Paolo Persona ◽  
Ilaria Valeri ◽  
Elisabetta Saraceni ◽  
Alessandro De Cassai ◽  
Fabrizia Calabrese ◽  
...  

There are no reliable, non-invasive methods to accurately measure cardiac output (CO) in septic patients. MostCare (Vytech Health™, Vygon, Padova, Italy), is a beat-to-beat, self calibrated method for CO measurement based on continuous analysis of reflected arterial pressure waveforms. We enrolled 40 patients that were suffering from septic shock and requiring norepinephrine infusion to target blood pressure in order to to evaluate the level of agreement between a calibrated transpulmonary thermodilution device (PiCCO System, Pulsion Medical Systems, Feldkirchen, Germany) and the MostCare system in detecting and tracking changes in CO measurements related to norepinephrine reduction in septic shock patients,. PiCCO was connected to a 5 Fr femoral artery catheter and to a central venous catheter. System calibration was performed with 15 mL of cold saline injection over about 3 s. The MostCare device was connected to the artery catheter to analyze the arterial waveform. Before reducing norepinephrine infusion, the PiCCO system was calibrated, the MostCare waveform was optimized, and the values of the complete hemodynamic profile were recorded (T1). Norepinephrine infusion was then reduced by 0.03 mcg/Kg/min. After 30 min, a new calibration of PiCCO system and a new record on both monitors were performed (T2). Static measurements agreements were assessed using the Bland-Altman test, while trending ability was investigated using polar plot analysis. If volume expansion occurred, then related data were separately analyzed. At T1 mean the CO was 5.38 (SD 0.60) L/min, the mean difference was 0.176 L/min, the limits of agreement (LoA) was +1.39 and −1.04 L/min, and the percentage error (PE) was 22.6%; at T2 the mean CO was 5.44 (SD 0.73) L/min, the mean difference was 0.053 L/min, the LoA was +1.51 and −1.40, and the PE was 27%. After considering the volume expansion between T1 and T2, the mean CO at T1 was 5.39 L/min (SD 0.47), the LoA was +1.09 and −0.78 L/min, and the percentage error (PE) was 17%; at T2 the mean CO was 5.35 L/min (SD 0.81), the LoA was +1.73 and −1.52 L/min, and the PE was 30%. The polar plot diagram seems to confirm the trending ability of MostCare system versus the reference method. In septic patients, when the arterial waveform is accurate, MostCare and PiCCO transpulmonary thermodilution exhibit good agreement even after the reduction of norepinephrine and changes in vascular tone or volume expansion. MostCare could be a rapid to set, reliable, and useful tool to monitor hemodynamic variations in septic patients in emergency contexts where thermodilution methods or other advanced systems are not easily available.


2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Lilli Kirkeskov ◽  
Rasmus K. Carlsen ◽  
Thomas Lund ◽  
Niels Henrik Buus

Abstract Background Patients with kidney failure treated with dialysis or kidney transplantation experience difficulties maintaining employment due to the condition itself and the treatment. We aimed to establish the rate of employment before and after initiation of dialysis and kidney transplantation and to identify predictors of employment during dialysis and posttransplant. Methods This systematic review and meta-analysis were carried out according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines for studies that included employment rate in adults receiving dialysis or a kidney transplant. The literature search included cross-sectional or cohort studies published in English between January 1966 and August 2020 in the PubMed, Embase, and Cochrane Library databases. Data on employment rate, study population, age, gender, educational level, dialysis duration, kidney donor, ethnicity, dialysis modality, waiting time for transplantation, diabetes, and depression were extracted. Quality assessment was performed using the Newcastle–Ottawa Scale. Meta-analysis for predictors for employment, with odds ratios and confidence intervals, and tests for heterogeneity, using chi-square and I2 statistics, were calculated. PROSPERO registration number: CRD42020188853. Results Thirty-three studies included 162,059 participants receiving dialysis, and 31 studies included 137,742 participants who received kidney transplantation. Dialysis patients were on average 52.6 years old (range: 16–79; 60.3% male), and kidney transplant patients were 46.7 years old (range: 18–78; 59.8% male). The employment rate (weighted mean) for dialysis patients was 26.3% (range: 10.5–59.7%); the employment rate was 36.9% pretransplant (range: 25–86%) and 38.2% posttransplant (range: 14.2–85%). Predictors for employment during dialysis and posttransplant were male, gender, age, being without diabetes, peritoneal dialysis, and higher educational level, and predictors of posttransplant: pretransplant employment included transplantation with a living donor kidney, and being without depression. Conclusions Patients with kidney failure had a low employment rate during dialysis and pre- and posttransplant. Kidney failure patients should be supported through a combination of clinical and social measures to ensure that they remain working.


2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Andrey Vatazin ◽  
Ekaterina Parshina ◽  
Rusudana Kantaria ◽  
Vadim Stepanov ◽  
Aleksei Zulkarnaev

Abstract Background and Aims Mineral and bone disorders (MBD) are common after successful kidney transplantation in patients with chronic kidney disease (CKD). We aimed to evaluate the prevalence of biochemical abnormalities among recipients of kidney transplant. Method We performed a cross-sectional study of 236 patients underwent successful kidney transplantation in our clinic between 2007 and 2019. Median age was 49 [Q1-Q3: 39; 58] years, mean estimated glomerular filtration rate (eGFR) was 51,1±21,8 ml/min/1,73 m2. Most of the patients received hemo- or peritoneal dialysis treatment, pre-emptive transplantation was performed in 6% cases. For those previously received dialysis, median duration of any type of dialysis was 21 [Q1-Q3: 11; 36] months. Median time after transplantation reached 42 [Q1-Q3: 19; 75] months. We evaluated serum intact parathyroid hormone (iPTH), total calcium (Ca), phosphorus (P) and alkaline phosphatase (AP) levels. Target ranges were defined according to National guidelines on CKD-MBD as follows: 2,1 - 2,5 mmol/l for total Ca, 0,87 – 1,49 mmol/l for P; normal AP level is defined considering a gender (53-128 Е/l for men, 42-98 Е/l for women). Target iPTH level for optimal and slightly decreased transplant function (corresponding chronic kidney diasease (CKD) stage 3T) was defined as 35-70 pg/ml, for eGFR corresponding CKD 4T – as 70-110 pg/ml, for CKD 5T – as 70-150 pg/ml. Results In our cohort normal iPTH level was observed only in 13% cases, whereas 84% of the patients had hyperparathyroidism. iPTH inversely correlated with eGFR (ρ= -0,454 [95%CI: -0,55; -0,34], р&lt;0,0001 – fig.1) and its level differed significantly between groups with different CKD stage (р&lt;0,0001, Kruskall-Wallis test) – fig.2. However, fraction of patients with target iPTH did not differ in recipient groups with normal and decreased eGFR (p=0,118). Hypercalcaemia was observed in 29% cases; there was a weak correlation of serum total Ca level with iPTH (ρ= 0,282 [95%CI: 0,15; 0,4], р&lt;0,0001) and AP (ρ=0,181 [95%CI: 0,05; 0,31], р=0,006) – fig.3. Hypophosphatemia was seen much more frequently during the first year after transplantation than in long-term period (30,3% vs 6,4% respectively, р=0,0002). Serum P level varied significantly in groups with different eGFR (p&lt;0,0001, Kruskall-Wallis test), increasing in parallel with declining of transplant function – fig.4. The percentage of patients within a target range of AP amounted to 54%, above the target range – 40,7%. In total, only 6,8% of our cohort had all laboratory parameters within the target range. Conclusion We observed a high prevalence of biochemical abnormalities in kidney transplant patients confirming that transplantation itself does not cure mineral and bone disorders in CKD patients.


2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Mineaki Kitamura ◽  
Yasushi Mochizuki ◽  
Tsuyoshi Matsuda ◽  
Yuta Mukae ◽  
Hiromi Nakanishi ◽  
...  

Abstract Background Higher serum uric acid (UA) levels are associated with poorer renal prognosis. In kidney transplantation, both donors and recipients are diagnosed as having chronic kidney diseases (CKD) based on renal function; however, their UA levels slightly vary. Elucidating the differences in UA would help improve kidney prognosis, especially for recipients. Therefore, we investigated UA levels in kidney transplant recipients by comparing them to those in their donors. Methods In this retrospective cross-sectional survey, background information and blood examination results were collected from the donors just before donation and after transplantation in the donors and recipients. Associations between UA and sex estimated glomerular filtration rate (eGFR), and body mass index (BMI) were evaluated. Data were assessed by the Wilcoxon rank-sum test for continuous variables and the chi-squared test for categorical variables; multiple linear regression analyses were performed to determine which factors were associated with renal function before and after transplantation. Results Participant characteristics were as follows. The mean donor age (n = 45, 16 men and 29 women) was 55 ± 11 years, and the mean recipient age (n = 45, 25 men and 20 women) was 46 ± 16 years. Sex-related differences (UA levels in men were predominant) existed in the UA of donors before (P < 0.001) and after donation (P < 0.001). Conversely, there were no significant sex-related differences in the UA of recipients (P = 0.51); the mean standardized eGFRs were similar in donors and recipients after transplantation. Multivariate linear regression analysis showed donor UA only correlated with donor sex before donation (P = 0.008). After donation, donor UA was associated with donor sex (P = 0.006), eGFR (P < 0.001), and BMI (P = 0.02). Notably, the UA of recipients after transplantation was only associated with eGFR (P = 0.003). Conclusions Sex has less impact on UA in recipients than in donors. UA has a greater impact on renal prognosis in women than men, even at the same UA level. Therefore, attention should be given to UA levels in female recipients. These findings can be useful for determining patient prognosis following kidney transplantation in both donors and recipients.


2020 ◽  
Vol 30 (1) ◽  
pp. 38-47 ◽  
Author(s):  
Kari Gire Dahl ◽  
Marit Helen Andersen ◽  
Kristin Hjorthaug Urstad ◽  
Ragnhild S. Falk ◽  
Eivind Engebretsen ◽  
...  

Background: A kidney transplantation requires complex self-care skills and adequate follow-up from health-care providers. Identifying strengths and limitations in different aspects of health literacy (HL) and associated variables are central to being able to improve health care. The objective of this study was to identify core variables associated with independent domains of HL 8 weeks following a kidney transplantation. Methods: A single-center cross-sectional study was conducted, wherein 159 kidney transplant recipients answered the Health Literacy Questionnaire (HLQ). Multivariable linear regression with backward elimination was used to investigate variables possibly associated with the 9 domains of HL. Results: The transplant recipients had the lowest scores in “appraisal of health information” and “navigating the healthcare system.” The highest scores were found in “feeling understood and supported by health-care providers” and “ability to actively engage with health-care provider.” General perceived self-efficacy, transplant-specific knowledge, and general health were the driving variables in several of the HL domains. Conclusions: The HLQ provides a more complex picture of strengths and limitations related to HL, as well as important knowledge about vulnerable groups following a kidney transplantation. The study offers an important supplement to the field of HL in kidney transplant care.


2019 ◽  
Vol 8 (12) ◽  
pp. 2084 ◽  
Author(s):  
Sudarat Piyasiridej ◽  
Natavudh Townamchai ◽  
Suwasin Udomkarnjananun ◽  
Somratai Vadcharavivad ◽  
Krit Pongpirul ◽  
...  

Background: Mycophenolic acid (MPA), a crucial immunosuppressive drug, and plasmapheresis, an effective immunoreduction method, are simultaneously used for the management of various immune-related diseases, including kidney transplantation. While plasmapheresis has been proven efficient in removing many substances from the blood, its effect on MPA plasma levels remains unestablished. Objectives: To evaluate the full pharmacokinetics of MPA by measuring the area under the time–concentration curve (AUC0–12), which is the best indicator for MPA treatment monitoring after each plasmapheresis session, and to compare the AUC0–12 measurements on the day with and on the day without plasmapheresis. Methods: A cross-sectional study was conducted in kidney transplantation recipients who were taking a twice-daily oral dose of mycophenolate mofetil (MMF, Cellcept®) and undergoing plasmapheresis at King Chulalongkorn Memorial Hospital, Bangkok, Thailand, during January 2018 and January 2019. The MPA levels were measured by an enzymatic method (Roche diagnostic®) 0, 1/2, 1, 2, 3, 4, 6, 8, and 12 h after MMF administration, for AUC0–12 calculation on the day with and on the day without plasmapheresis sessions. Plasmapheresis was started within 4 h after administering the oral morning dose of MMF. Our primary outcome was the difference of AUC0–12 between the day with and the day without plasmapheresis. Results: Forty complete AUC measurements included 20 measurements on the plasmapheresis day and other 20 measurements on the day without plasmapheresis in six kidney transplant patients. The mean age of the patients was 56.2 ± 20.7 years. All patients had received 1000 mg/day of MMF for at least 72 h before undergoing 3.5 ± 1.2 plasmapheresis sessions. The mean AUC on the day with plasmapheresis was lower than that on the day without plasmapheresis (28.22 ± 8.21 vs. 36.79 ± 10.29 mg × h/L, p = 0.001), and the percentage of AUC reduction was 19.49 ± 24.83%. This was mainly the result of a decrease in AUC0–4 of MPA (23.96 ± 28.12% reduction). Conclusions: Plasmapheresis significantly reduces the level of full AUC0–12 of MPA. The present study is the first to measure the full AUC0–12 in MPA-treated patients undergoing plasmapheresis. Our study suggests that a supplementary dose of MPA is necessary for patients undergoing plasmapheresis.


2021 ◽  
Vol 6 (2) ◽  
pp. e28-e28
Author(s):  
Afshar Zomorodi ◽  
Farnood Salmani Milani ◽  
Mohsen Mohammad Rahimi

Introduction: One of the complications of renal transplantation after surgery, which is frequently observed, is the symptomatic accumulation of fluid around the kidney, such as hematoma, lymphocele or lymphuria. Objectives: The incidence of lymphocele after kidney transplantation is widely different, therefore we decided to conduct a study to investigate the prevalence of lymphocytes in transplant recipients. Patients and Methods: The present study was a cross-sectional descriptive-analytical study. The target population in this study was adult and middle-aged men and women with end-stage renal disease (ESRD) who have undergone kidney transplant surgery at the kidney center of Imam Reza hospital in the last 5 years. Results: In all transplant recipients, symptomatic lymphoceles were observed in only 5 patients (3 female and 2 male patients with the mean age of 40.2±17.2 years) who occurred on average 48.4 ± 21.12 days after surgery between 24 days and 78 days. The results showed that 62% (156 cases) of patients were men and 211 patients (84.4%) were male transplant recipients. Also, 198 (79.2%) transplant donors were living donor and 52 (20.8%) were deceased donor/brain death. Conclusion: In the present study, we found the prevalence of lymphocele in transplant recipients in the kidney transplant center of Imam Reza in five years is 5 patients (2%) out of 250 patients with an average annual incidence of 1-2%.


2020 ◽  
Vol 3 (3) ◽  
pp. 001-006
Author(s):  
Richard Paul Mzee ◽  
Obadia Venance Nyongole ◽  
Nashivai Elias Kivuyo ◽  
Mungeni Athanas Misidai ◽  
Gudila Valentine Shirima ◽  
...  

Renal replacement therapy (RRT) is the treatment of choice for patients with End Stage Renal disease (ESRD), RRT include dialysis and kidney transplantation. Some sub-Saharan African countries including Tanzania have improved nephrology services dialysis and kidney transplant. This study aimed to assess knowledge, attitude and practices towards kidney transplantation among patients undergoing dialysis at Muhimbili National Hospital. This was a hospital based cross-sectional study that was conducted at Muhimbili National Hospital. A total of 190 patients were interviewed, majority were males 133(70%) with the age range of 18-80 years. Most patients 183(96.35%) were aware of Kidney transplantation the main source of information 175(95.6%) being hospital with 159 (86.9%) patients being aware of rules guiding kidney transplantation and 166 (90.7%) were aware of lifelong medication use after kidney transplantation. Knowledge on transplant was noted in 115(62.8%) with all of them being willing to receive kidney from blood related relatives. Majority 188 (64.5%) patients were not sure whether live kidney donation was better than deceased kidney donation. Better knowledge may ultimately translate into the act of donation. Effective measures should be taken to educate people with relevant information with the involvement of media, doctors and religious scholars. Large proportion considers Kidney Transplant positively but it limited by shortage of donors.


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