RESUMEN
The Netherlands was the first European country to implement unspecified kidney donation in 2000. This qualitative study aimed to evaluate the experiences of unspecified kidney donors (UKDs) in our transplant institute to improve the care for this valuable group of donors. We conducted semi-structured interviews with 106 UKDs who donated between 2000-2016 (response rate 84%). Interviews were audio-recorded, transcribed verbatim and independently coded by 2 researchers in NVivo using thematic analysis. The following 14 themes reflecting donor experiences were found: Satisfaction with donation; Support from social network; Interpersonal stress; Complaints about hospital care; Uncertainty about donor approval; Life on hold between approval and actual donation; Donation requires perseverance and commitment; Recovery took longer than expected; Normalization of the donation; Becoming an advocate for living kidney donation; Satisfaction with anonymity; Ongoing curiosity about outcome or recipient; Importance of anonymous communication; Anonymity is not watertight. The data reinforced that unspecified kidney donation is a positive experience for donors and that they were generally satisfied with the procedures. Most important complaints about the procedure concerned the length of the assessment procedure and the lack of acknowledgment for UKDs from both their recipients and health professionals. Suggestions are made to address the needs of UKDs.
Asunto(s)
Trasplante de Riñón , Donadores Vivos , Humanos , Trasplante de Riñón/métodos , Riñón , Recolección de Tejidos y Órganos , Investigación CualitativaRESUMEN
Research has shown that a home-based educational intervention for patients with chronic kidney disease results in better knowledge and communication, and more living donor kidney transplantations (LDKT). Implementation research in the field of renal care is almost nonexistent. The aims of this study were (1) to demonstrate generalizability, (2) evaluate the implementation process, and (3) to assess the relationship of intervention effects on LDKT-activity. Eight hospitals participated in the project. Patients eligible for all kidney replacement therapies (KRT) were invited to participate. Effect outcomes were KRT-knowledge and KRT-communication, and treatment choice. Feasibility, fidelity, and intervention costs were assessed as part of the process evaluation. Three hundred and thirty-two patients completed the intervention. There was a significant increase in KRT-knowledge and KRT-communication among participants. One hundred and twenty-nine out of 332 patients (39%) had LDKT-activity, which was in line with the results of the clinical trials. Protocol adherence, knowledge, and age were correlated with LDKT-activity. This unique implementation study shows that the results in practice are comparable to the previous trials, and show that the intervention can be implemented, while maintaining quality. Results from the project resulted in the uptake of the intervention in standard care. We urge other countries to investigate the uptake of the intervention.
Asunto(s)
Trasplante de Riñón , Insuficiencia Renal Crónica , Conocimientos, Actitudes y Práctica en Salud , Humanos , Riñón , Donadores Vivos , Insuficiencia Renal Crónica/terapiaRESUMEN
BACKGROUND: Live donor nephrectomy is a safe procedure. However, long-term donor prognosis is debated, necessitating high-quality studies. METHODS: A follow-up study of 761 living kidney donors was conducted, who visited the outpatient clinic and were propensity score matched and compared to 1522 non-donors from population-based cohort studies. Primary outcome was kidney function. Secondary outcomes were BMI (kg/m2), incidences of hypertension, diabetes, cardiovascular events, cardiovascular and overall mortality, and quality of life. RESULTS: Median follow-up after donation was 8.0 years. Donors had an increase in serum creatinine of 26 µmol/l (95% CI 24-28), a decrease in eGFR of 27 ml/min/1.73 m2 (95% CI - 29 to - 26), and an eGFR decline of 32% (95% CI 30-33) as compared to non-donors. There was no difference in outcomes between the groups for ESRD, microalbuminuria, BMI, incidence of diabetes or cardiovascular events, and mortality. A lower risk of new-onset hypertension (OR 0.45, 95% CI 0.33-0.62) was found among donors. The EQ-5D health-related scores were higher among donors, whereas the SF-12 physical and mental component scores were lower. CONCLUSION: Loss of kidney mass after live donation does not translate into negative long-term outcomes in terms of morbidity and mortality compared to non-donors. TRIAL REGISTRATION: Dutch Trial Register NTR3795.
Asunto(s)
Trasplante de Riñón/efectos adversos , Riñón/fisiología , Donadores Vivos/psicología , Nefrectomía/efectos adversos , Calidad de Vida/psicología , Estudios de Casos y Controles , Creatinina/sangre , Diabetes Mellitus/epidemiología , Diabetes Mellitus/etiología , Femenino , Tasa de Filtración Glomerular , Humanos , Hipertensión/epidemiología , Hipertensión/etiología , Incidencia , Pruebas de Función Renal , Donadores Vivos/estadística & datos numéricos , Masculino , Nefrectomía/psicología , Vigilancia de la Población , Complicaciones Posoperatorias/epidemiología , Puntaje de Propensión , Resultado del TratamientoRESUMEN
BACKGROUND: After kidney transplantation non-adherence and inadequate self-management undermine clinical outcomes and quality of life. Both have been demonstrated to be substantial in all age groups. However, interventions promoting adherence and self-management among kidney transplant recipients that have proven to be effective are scarce. In this study we aim to develop and test an intervention to optimize adherence and self-management. In this article we describe the background and design of the trial entitled 'promoting Medication AdheRence and Self-management among kidney transplant recipients' (MARS-trial)'. METHODS/DESIGN: This is a single-center, parallel arm randomized controlled trial. Nonadherent kidney transplant recipients aged 12 years or older are eligible for inclusion. Patients will be randomly assigned to either the experimental or a control group. The control group will receive care-as-usual. The experimental group will receive care-as-usual plus the MARS-intervention. The MARS-intervention is an outreaching intervention, based on the principles of (multi) systemic therapy which means involving the social network. A standardized intervention protocol is used for consistency but we will tailor the behavior change techniques used to the specific needs and determinants of each patient. The primary outcome of medication adherence will be measured using electronic monitoring. Secondary outcome measures regarding medication adherence and self-management are also assessed. Data is collected at baseline (T0), after a run-in period (T1), at six months post-baseline/end of treatment (T2) and after a six month follow-up period (T3). DISCUSSION: We combined elements of (multi) systemic therapy and evidence-based behavior change techniques to create an outreaching and highly individualized intervention. In this trial we will investigate the impact on medication adherence and self-management after kidney transplantation. TRIAL REGISTRATION: Netherlands Trial Register,trial number NTR7462. Registered 7th September 2018, https://www.trialregister.nl/trial/7264.
Asunto(s)
Rechazo de Injerto/prevención & control , Inmunosupresores/uso terapéutico , Fallo Renal Crónico/cirugía , Trasplante de Riñón , Cumplimiento de la Medicación , Automanejo/métodos , Humanos , Cuestionario de Salud del Paciente , Calidad de Vida , Ensayos Clínicos Controlados Aleatorios como Asunto , Red Social , Apoyo Social , Receptores de TrasplantesRESUMEN
BACKGROUND: Maintaining anonymity is a requirement in the Netherlands and Sweden for kidney donation from live donors in the context of nondirected (or unspecified) and paired exchange (or specified indirect) donation. Despite this policy, some donors and recipients express the desire to know one another. Little empirical evidence informs the debate on anonymity. This study explored the experiences, preferences, and attitudes of donors and recipients toward anonymity. STUDY DESIGN: Retrospective observational multicenter study using both qualitative and quantitative methods. SETTING & PARTICIPANTS: 414 participants from Dutch and Swedish transplantation centers who received or donated a kidney anonymously (nondirected or paired exchange) completed a questionnaire about anonymity. Participation was a median of 31 months after surgery. FACTORS: Country of residence, donor/recipient status, transplant type, time since surgery. OUTCOMES: Experiences, preferences, and attitudes toward anonymity. RESULTS: Most participants were satisfied with their experience of anonymity before and after surgery. A minority would have liked to have met the other party before (donors, 7%; recipients, 15%) or after (donors, 22%; recipients, 31%) surgery. Significantly more recipients than donors wanted to meet the other party. Most study participants were open to meeting the other party if the desire was mutual (donors, 58%; recipients, 60%). Donors agree significantly more with the principle of anonymity before and after surgery than recipients. Donors and recipients thought that if both parties agreed, it should be permissible to meet before or after surgery. There were few associations between country or time since surgery and experiences or attitudes. The pros and cons of anonymity reported by participants were clustered into relational and emotional, ethical, and practical and logistical domains. LIMITATIONS: The relatively low response rate of recipients may have reduced generalizability. Recall bias was possible given the time lag between transplantation and data collection. CONCLUSIONS: This exploratory study illustrated that although donors and recipients were usually satisfied with anonymity, the majority viewed a strict policy on anonymity as unnecessary. These results may inform policy and education on anonymity.
Asunto(s)
Anonimización de la Información , Trasplante de Riñón , Donadores Vivos , Recolección de Tejidos y Órganos , Receptores de Trasplantes , Adulto , Actitud , Anonimización de la Información/ética , Anonimización de la Información/psicología , Familia/psicología , Femenino , Humanos , Trasplante de Riñón/ética , Trasplante de Riñón/métodos , Trasplante de Riñón/estadística & datos numéricos , Donadores Vivos/psicología , Donadores Vivos/estadística & datos numéricos , Masculino , Países Bajos , Satisfacción Personal , Información Personal , Opinión Pública , Suecia , Recolección de Tejidos y Órganos/ética , Recolección de Tejidos y Órganos/métodos , Recolección de Tejidos y Órganos/psicología , Receptores de Trasplantes/psicología , Receptores de Trasplantes/estadística & datos numéricosRESUMEN
The increase in patients using public solicitation (PS) to find a living kidney donor has generated a debate about the ethical complexities of PS. To investigate why patients engaged in PS and what they experienced during PS, we conducted semistructured interviews with 20 Dutch patients with end-stage renal disease who had publicly solicited a living donor. Transcripts were thematically analyzed. We identified ten themes on patients' considerations preceding PS: cautiousness in discussing living donation within social network; reluctance to accept a kidney from loved ones; rejection/withdrawal of related donor candidates; moral objections to paid donation; the ease of social media; encouraged by others; ends justifying the means; despair and urge to take action; public disclosure of vulnerability; fear of being (perceived to be) selfish. We identified nine themes on patients' experiences: positive emotions and support generated by action; genuine and ulterior motives for donation; patients acting as educators and screeners; time- and energy-consuming process; emotionally taxing process; positive interactions with donor candidates; feeling of dependency and obligation; limited cooperation from health professionals; demands a proactive attitude and media strategy. These results can inform and complement (existing) policies on PS and provide content for education of patients who are considering PS.
Asunto(s)
Trasplante de Riñón , Donadores Vivos/psicología , Adulto , Anciano , Femenino , Humanos , Fallo Renal Crónico/psicología , Donadores Vivos/ética , Masculino , Persona de Mediana EdadRESUMEN
AIMS: This study investigated self-management challenges and support needs experienced by kidney transplant recipients. BACKGROUND: After kidney transplantation, recipients are expected to take an active role in self-management. However, evidence suggests that nurses experience difficulties operationalizing self-management support. Greater insight into the recipients' perspective could help to improve the adequacy and efficacy of nurse-led self-management support. DESIGN: A cross-sectional qualitative study. METHODS: Focus groups and individual interviews were carried out with kidney transplant recipients treated in a Dutch university hospital. Directed content analysis (DCA) was used. RESULTS: Forty-one kidney transplant recipients participated. Challenges after transplantation included becoming an expert patient, adjusting daily life activities, dealing with medical regimen, forming relationships with nurses, dealing with social consequences, dealing with emotions related to transplantation and the donor and improving self-image. To be able to deal with these challenges, participants wished to receive disease specific knowledge and instruction, share personal experiences with fellow patients, share and discuss not only medical but also emotional and social issues with nurses and wanted to be encouraged through positive feedback. "One-size fits all" education was considered insufficient in meeting their needs. CONCLUSIONS: After kidney transplantation, recipients experienced various challenges in dealing with the medical, emotional and social tasks. Current support from nurses overlooked recipients' emotional and social support needs. Nurses need adequate tools and training to be able to meet recipients' self-management support needs.
Asunto(s)
Trasplante de Riñón/psicología , Rol de la Enfermera , Automanejo , Apoyo Social , Receptores de Trasplantes/psicología , Adaptación Psicológica , Adulto , Anciano , Emociones , Femenino , Humanos , Masculino , Persona de Mediana Edad , Educación del Paciente como Asunto , Investigación CualitativaRESUMEN
Anonymity between living donors and recipients is a topic of discussion among transplant professionals. This longitudinal study explored living kidney donors' and patients' perspectives on anonymity. Prior to surgery (T0) and 3 months afterward (T1), participants in unspecified or specified indirect donation programs completed a questionnaire on their experiences with and attitudes toward anonymity as well as demographic and medical characteristics. Nonparametric tests were used to assess group differences and associations. Participants were content with anonymity at T0 and T1. Fourteen and 23% wanted to meet at T0 and T1, respectively. If the other party expressed the wish to meet, 50% (T0) and 55% (T1) would be willing to meet. Most participants agreed that meeting should be allowed if both parties agree. Attitude toward anonymity did not differ between donors/recipients, nor between T0/T1 and unspecified/specified indirect donation programs. This study showed that most donors and recipients who participated in anonymous donation schemes are in favor of a conditional approach to anonymity. Guidelines on how to revoke anonymity if both parties agree are needed and should include education about pros and cons of (non-) anonymity and a logistical plan on how, when, where, and by whom anonymity should be revoked.
Asunto(s)
Confidencialidad/psicología , Trasplante de Riñón/métodos , Donadores Vivos/psicología , Donantes de Tejidos/psicología , Obtención de Tejidos y Órganos/métodos , Receptores de Trasplantes/psicología , Adulto , Anciano , Distribución de Chi-Cuadrado , Confidencialidad/ética , Femenino , Humanos , Trasplante de Riñón/ética , Donadores Vivos/ética , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Países Bajos , Estadísticas no Paramétricas , Adulto JovenRESUMEN
BACKGROUND: The aim was to test the effectiveness of early home-based group education on knowledge and communication about renal replacement therapy (RRT). METHODS: We conducted a randomized controlled trial using a cross-over design among 80 end-stage renal disease (ESRD) patients. Between T0 and T1 (weeks 1-4) Group 1 received the intervention and Group 2 received standard care. Between T1 and T2 (weeks 5-8) Group 1 received standard care and Group 2 received the intervention. The intervention was a group education session on RRT options held in the patient's home given by social workers. Patients invited members from their social network to attend. Self-report questionnaires were used at T0, T1 and T2 to measure patients' knowledge and communication, and concepts from the Theory of Planned Behaviour such as attitude. Comparable questionnaires were completed pre-post intervention by 229 attendees. Primary RRT was registered up to 2 years post-intervention. Multilevel linear modelling was used to analyse patient data and paired t-tests for attendee data. RESULTS: Statistically significant increases in the primary targets knowledge and communication were found among patients and attendees after receiving the intervention. The intervention also had a significant effect in increasing positive attitude toward living donation and haemodialysis. Of the 80 participants, 49 underwent RRT during follow-up. Of these, 34 underwent a living donor kidney transplant, of which 22 were pre-emptive. CONCLUSIONS: Early home-based group education supports informed decision-making regarding primary RRT for ESRD patients and their social networks and may remove barriers to pre-emptive transplantation.
Asunto(s)
Toma de Decisiones , Intervención Educativa Precoz , Servicios de Atención de Salud a Domicilio , Fallo Renal Crónico/terapia , Educación del Paciente como Asunto , Diálisis Renal/psicología , Terapia de Reemplazo Renal/métodos , Comunicación , Estudios Cruzados , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Fallo Renal Crónico/psicología , Masculino , Persona de Mediana Edad , Terapia de Reemplazo Renal/psicología , Encuestas y CuestionariosRESUMEN
BACKGROUND: The once-daily formulation of tacrolimus (TAC(OD)) has been developed to overcome adherence problems. Conversion from the twice-daily TAC (TAC(BID)) formulation to TAC(OD) on a 1:1 basis, however, often leads to a decrease of TAC predose concentrations, which averages â¼15%. Switching between the two TAC formulations may thus influence drug efficacy and necessitates therapeutic drug monitoring. As an additional tool in transplantation diagnostics, phospho-specific flow cytometry was used to study the biological effects of conversion on p38MAPK phosphorylation, a kinase involved in T-lymphocyte activation. METHODS: Stable renal transplant recipients (n = 12), at least 1 year after their transplantation, were converted from TAC(BID) to TAC(OD) on 1:1 mg for mg base. Comedication consisted of mycophenolate mofetil (n = 10) and prednisolone (n = 3). TAC whole-blood predose concentrations were determined by immunoassay before and 3 months after conversion. P38MAPK phosphorylation was measured in T lymphocytes by whole-blood phospho-specific flow cytometry. RESULTS: Three months after conversion, no significant decreases in TAC predose concentrations (C0) were found (P = 0.54), whereas p38MAPK phosphorylation increased with 11.4% (P < 0.05) in CD4 and with 15.6% (P < 0.05) in CD8 T lymphocytes. The TAC C0 during treatment with TAC(BID) correlated inversely with p38MAPK phosphorylation in T lymphocytes (rs = -0.638; P < 0.05). CONCLUSIONS: These results suggest that the measurement of p38MAPK phosphorylation status in T lymphocytes is a sensitive method to determine the biological effects of TAC before and after conversion from TAC(BID) to TAC(OD). This method could be a more sensitive tool for therapeutic drug monitoring of TAC.
Asunto(s)
Rechazo de Injerto/prevención & control , Inmunosupresores/administración & dosificación , Fosforilación/efectos de los fármacos , Linfocitos T/efectos de los fármacos , Tacrolimus/administración & dosificación , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismo , Adulto , Anciano , Esquema de Medicación , Monitoreo de Drogas/métodos , Femenino , Rechazo de Injerto/sangre , Rechazo de Injerto/metabolismo , Humanos , Inmunosupresores/sangre , Trasplante de Riñón/métodos , Masculino , Persona de Mediana Edad , Ácido Micofenólico/administración & dosificación , Prednisolona/administración & dosificación , Linfocitos T/metabolismo , Tacrolimus/sangre , Receptores de Trasplantes , Adulto JovenRESUMEN
BACKGROUND: The aim of this study was to investigate whether pretransplant tacrolimus (Tac) dose requirements of patients scheduled to undergo living donor kidney transplantation correlate with posttransplantation dose requirements. METHODS: The predictive value of Tac dose requirements (defined as the ratio of the Tac predose concentration, C0, divided by the total daily Tac dose, D) pretransplantation on this same parameter posttransplantation was assessed retrospectively in a cohort of 57 AB0-incompatible kidney transplant recipients. These patients started immunosuppressive therapy 14 days before transplant surgery. All patients were using a stable dose of glucocorticoids and were at steady-state Tac exposure before transplantation. RESULTS: Tac dose requirements immediately before transplantation (C0/Dbefore) explained 63% of the Tac dose requirements on day 3 after transplantation: r = 0.633 [F (1, 44) = 75.97, P < 0.01]. No other clinical and demographic variables predicted Tac dose requirements early after transplantation. CONCLUSIONS: Steady-state Tac dose requirement before transplantation largely predicted posttransplantation Tac dose requirements in AB0-incompatible kidney transplant recipients. The importance of this finding is that the posttransplantation Tac dose can be individualized based on a patient's pretransplantation Tac concentration/dose ratio. Pretransplant Tac phenotyping therefore has the potential to improve transplantation outcomes.
Asunto(s)
Antígenos de Grupos Sanguíneos/sangre , Inmunosupresores/administración & dosificación , Inmunosupresores/sangre , Tacrolimus/administración & dosificación , Tacrolimus/sangre , Adulto , Anciano , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Femenino , Rechazo de Injerto/sangre , Rechazo de Injerto/prevención & control , Humanos , Trasplante de Riñón/métodos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Receptores de Trasplantes , Adulto JovenRESUMEN
Tacrolimus is a critical dose drug with a considerable intrapatient variability (IPV) in its pharmacokinetics. We investigated whether a high IPV in tacrolimus exposure is associated with adverse long-term renal transplantation outcomes. Tacrolimus IPV was calculated from predose concentrations measured between 6 and 12 months post-transplantation of 808 renal transplant recipients (RTRs) transplanted between 2000 and 2010. One hundred and eighty-eight (23.3%) patients reached the composite end point consisting of graft loss, late biopsy-proven rejection, transplant glomerulopathy, or doubling of serum creatinine concentration between month 12 and the last follow-up. The cumulative incidence of the composite end point was significantly higher in patients with high IPV than in patients with low IPV (hazard ratio: 1.41, 95% CI: 1.06-1.89; P = 0.019). After the adjustment for several factors, the higher incidence of the composite end point for RTRs with a high IPV remained statistically significant (hazard ratio: 1.42, 95% CI: 1.06-1.90; P = 0.019). Younger recipient age at transplantation, previous transplantation, worse graft function (at month 6 post-transplantation), and low mean tacrolimus concentration at 1 year post-transplantation were additional predictors for worse long-term transplant outcome. A high tacrolimus IPV is an independent risk factor for adverse kidney transplant outcomes that can be used as an easy monitoring tool to help identify high-risk RTRs.
Asunto(s)
Trasplante de Riñón , Insuficiencia Renal/cirugía , Tacrolimus/administración & dosificación , Adolescente , Adulto , Anciano , Biopsia , Creatinina/sangre , Femenino , Rechazo de Injerto/sangre , Humanos , Inmunoensayo , Terapia de Inmunosupresión , Inmunosupresores/uso terapéutico , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Reproducibilidad de los Resultados , Estudios Retrospectivos , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento , Adulto JovenRESUMEN
A minority of living kidney donors (between 5-25%) have poor psychological outcomes after donation. There is mixed evidence on the influence of medical complications on these outcomes. We examined whether medical complications among donors and recipients predicted changes in donors' mental health (psychological symptoms and well-being) between predonation and 1 year postdonation. One-hundred and forty-five donors completed questionnaires on mental health predonation and 3 and 12 months postdonation. Number of recipient rehospitalizations and donor complications (none; minor; or severe) were obtained from medical records at 3 and 12 months after surgery. Multilevel regression analyses were used to examine the association between medical complications and changes in donors' mental health over time after controlling for sociodemographic characteristics. We found that donor complications (P = 0.003) and recipient rehospitalizations (P = 0.001) predicted an increase in donors' psychological symptoms over time. Recipient rehospitalizations also predicted a decrease in well-being (P = 0.005) over time; however, this relationship became weaker over time. We conclude that medical complications experienced by either the donor or recipient is a risk factor for deterioration in donors' mental health after living kidney donation. Professionals should monitor donors who experience medical complications and offer additional psychological support when needed.
Asunto(s)
Trasplante de Riñón , Donadores Vivos/psicología , Trastornos Mentales/complicaciones , Salud Mental , Nefrectomía/psicología , Insuficiencia Renal/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Hospitalización , Humanos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Calidad de Vida , Análisis de Regresión , Factores de Riesgo , Autoimagen , Encuestas y Cuestionarios , Recolección de Tejidos y Órganos , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: The benefits of live donor kidney transplantation must be balanced against the potential harm to the donor. Well-designed prospective studies are needed to study the long-term consequences of kidney donation. METHODS: The "LOng-term follow-up after liVE kidney donation" (LOVE) study is a single center longitudinal cohort study on long-term consequences after living kidney donation. We will study individuals who have donated a kidney from 1981 through 2010 in the Erasmus University Medical Center in Rotterdam, The Netherlands. In this time period, 1092 individuals donated a kidney and contact information is available for all individuals. Each participating donor will be matched (1:4) to non-donors derived from the population-based cohort studies of the Rotterdam Study and the Study of Health in Pomerania. Matching will be based on baseline age, gender, BMI, ethnicity, kidney function, blood pressure, pre-existing co-morbidity, smoking, the use of alcohol and highest education degree. Follow-up data is collected on kidney function, kidney-related comorbidity, mortality, quality of life and psychological outcomes in all participants. DISCUSSION: This study will provide evidence on the long-term consequences of live kidney donation for the donor compared to matched non-donors and evaluate the current donor eligibility criteria. TRIAL REGISTRATION: Dutch Trial Register NTR3795 .
Asunto(s)
Enfermedades Cardiovasculares/epidemiología , Diabetes Mellitus/epidemiología , Hipertensión/epidemiología , Trasplante de Riñón/efectos adversos , Trasplante de Riñón/psicología , Donadores Vivos/estadística & datos numéricos , Adulto , Anciano , Estudios de Casos y Controles , Femenino , Estudios de Seguimiento , Tasa de Filtración Glomerular , Humanos , Incidencia , Donadores Vivos/psicología , Estudios Longitudinales , Masculino , Salud Mental , Persona de Mediana Edad , Países Bajos/epidemiología , Calidad de Vida , Proyectos de Investigación , Factores de Tiempo , Adulto JovenRESUMEN
Due to the ongoing shortage of deceased-donor organs, novel strategies to augment kidney transplantation rates through expanded living donation strategies have become essential. These include desensitization in antibody-incompatible transplants and kidney paired donation (KPD) programs. KPD enables kidney transplant candidates with willing but incompatible living donors to join a registry of other incompatible pairs in order to find potentially compatible transplant solutions. Given the significant immunologic barriers with fewer donor options, single-center or small KPD programs may be less successful in transplanting the more sensitized patients; the optimal solution for the difficult-to-match patient is access to more potential donors and large multicenter or national registries are essential. Multicenter KPD programs have become common in the last decade, and now represent one of the most promising opportunities to improve transplant rates. To maximize donor-recipient matching, and minimize immunologic risk, these multicenter KPD programs use sophisticated algorithms to identify optimal match potential, with simultaneous two-, three- or more complex multiway exchanges. The article focuses on the recent progresses in KPD and it also reviews some of the differences and commonalities across four different national KPD programs.
Asunto(s)
Algoritmos , Selección de Donante/organización & administración , Trasplante de Riñón , Obtención de Tejidos y Órganos/organización & administración , Técnicas de Apoyo para la Decisión , Histocompatibilidad , Humanos , Donadores Vivos/provisión & distribución , Nefrectomía , Desarrollo de Programa , Sistema de Registros , Donantes de TejidosRESUMEN
Belatacept is a novel immunosuppressive drug that inhibits the co-stimulatory signal required for T-cell activation and has been approved for the prevention of acute rejection after kidney transplantation. In this article, the need for and possibility of therapeutic drug monitoring (TDM) of belatacept is reviewed. Clinical studies have defined the upper limit of the therapeutic window, but the lower limit is unknown. The pharmacokinetics and pharmacodynamics of belatacept display only limited interpatient variability but no data are available on the intrapatient variability of these parameters. Several assays to measure serum belatacept concentrations and its in vitro immunologic effects have been developed, but these are not commercially available and require validation. Importantly, pharmacodynamic assays have not been correlated with clinical outcomes (both efficacy and safety) and have only used surrogate laboratory readouts. TDM is likely to become feasible in the near future if these assays are developed further. However, because its pharmacokinetics and pharmacodynamics seem to vary little between individual patients, it may not be necessary to perform TDM for this drug. There could be a role for such an approach if one seeks to lower the belatacept doses further in an attempt to minimize adverse events. A future, prospective concentration-ranging study that defines the lower end of the belatacept therapeutic window should, however, be conducted first to provide the rationale for performing TDM of this novel immunosuppressant.
Asunto(s)
Abatacept/sangre , Monitoreo de Drogas , Inmunosupresores/sangre , Trasplante de Riñón , Abatacept/inmunología , Abatacept/farmacología , Antígeno B7-2/análisis , Antígeno CTLA-4/antagonistas & inhibidores , Relación Dosis-Respuesta a Droga , Ensayo de Inmunoadsorción Enzimática , Tasa de Filtración Glomerular , Humanos , Trasplante de Riñón/efectos adversos , Distribución TisularRESUMEN
BACKGROUND: Intrapatient variability (IPV) in tacrolimus exposure is associated with renal allograft failure. The aim of this study was to investigate whether conversion from the twice-daily tacrolimus formulation (Tac-TD) to a once-daily formulation (Tac-OD) leads to a lower IPV in tacrolimus exposure. METHODS: Two hundred forty-seven stable renal transplant recipients were converted from Tac-TD to Tac-OD (Advagraf) on a 1:1-mg total daily dose basis. After conversion, patients were followed for 12 months and tacrolimus predose whole-blood concentrations (C0), serum creatinine, estimated glomerular filtration rate, and proteinuria were measured. These parameters were compared with those collected at all outpatient visits in the 12-month period (±3 months) before conversion (Tac-TD period). The IPV was calculated based on the dose-adjusted tacrolimus C0. RESULTS: The Tac-OD formulation provided an excellent graft survival (100%), a low acute rejection rate (0.8%), and good tolerability. Renal function remained stable: estimated glomerular filtration rate 48 (16-90) versus 46 (12-90) mL/min (P = 0.15) before and after conversion, respectively. After conversion to Tac-OD, mean C0 was significantly lower, decreasing from 5.7 ± 1.5 to 5.0 ± 1.5 ng/mL, corresponding to a 12% reduction (P < 0.01). Both drugs had similar IPVs (Tac-TD: 17.3% ± 1.6% versus Tac-OD: 16.4% ± 1.6%, P = 0.31). CONCLUSIONS: Although conversion from Tac-TD to Tac-OD significantly reduces tacrolimus exposure as measured by C0 and seems safe, it does not reduce IPV in tacrolimus exposure.
Asunto(s)
Supervivencia de Injerto/efectos de los fármacos , Inmunosupresores/administración & dosificación , Trasplante de Riñón , Tacrolimus/administración & dosificación , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Esquema de Medicación , Femenino , Tasa de Filtración Glomerular , Rechazo de Injerto/prevención & control , Humanos , Inmunosupresores/efectos adversos , Inmunosupresores/farmacocinética , Masculino , Persona de Mediana Edad , Tacrolimus/efectos adversos , Tacrolimus/farmacocinética , Adulto JovenRESUMEN
Previously reported short-term results after live kidney donation show no negative consequences for the donor. The incidence of new-onset morbidity takes years to emerge, making it highly likely that this will be missed during short-term follow-up. Therefore, evidence on long-term outcome is essential. A 10-year follow-up on renal function, hypertension, quality of life (QOL), fatigue, and survival was performed of a prospective cohort of 100 donors. After a median follow-up time of 10 years, clinical data were available for 97 donors and QOL data for 74 donors. Nine donors died during follow-up of unrelated causes to donation, and one donor was lost to follow-up. There was a significant decrease in kidney function of 12.9 ml/min (P < 0.001) at follow-up. QOL showed significant clinically relevant decreases of 10-year follow-up scores in SF-36 dimensions of physical function (P < 0.001), bodily pain (P = 0.001), and general health (P < 0.001). MFI-20 scores were significantly higher for general fatigue (P < 0.001), physical fatigue (P < 0.001), reduced activity (P = 0.019), and reduced motivation (P = 0.030). New-onset hypertension was present in 25.6% of the donors. Donor outcomes are excellent 10 years post-donation. Kidney function appears stable, and hypertension does not seem to occur more frequently compared to the general population.
Asunto(s)
Fatiga/complicaciones , Fatiga/terapia , Donadores Vivos , Nefrectomía/métodos , Insuficiencia Renal/terapia , Anciano , Índice de Masa Corporal , Femenino , Estudios de Seguimiento , Tasa de Filtración Glomerular , Humanos , Hipertensión/complicaciones , Hipertensión/terapia , Pruebas de Función Renal , Masculino , Persona de Mediana Edad , Países Bajos , Dolor , Estudios Prospectivos , Calidad de Vida , Sistema de Registros , Insuficiencia Renal/complicaciones , Resultado del TratamientoRESUMEN
Pretransplant removal of antiblood group ABO antibodies is the cornerstone of all current ABO-incompatible (ABOi) transplantation programmes. In our protocol, plasmapheresis (PP) is performed with a plasmafilter followed by immunoadsorption (IA) of anti-ABO antibodies. The bleeding complications of this technique are not known. We analysed the data of all 65 consecutive ABOi kidney transplantations between March 2006 and October 2013 and compared these with matched 130 ABO-compatible (ABOc) kidney transplantations. Cases differed from controls in the pre-operative regimen, which included IA-PP and rituximab, tacrolimus, mycophenolate mofetil, prednisone and immunoglobulines. Data on platelet count, blood loss and red blood cell (EC) transfusions during 48 h postoperatively were collected. ABOi patients received EC transfusions more frequently than controls (29% vs. 12%, P = 0.005). Intra-operative blood loss was higher (544 vs. 355 ml, P < 0.005) and they experienced more major bleeding (≥3 EC within 24 h, 15% vs. 2%, P < 0.0005). Platelet count decreased by 28% after the pre-operative IA. In a multivariate model, only the number of pre-operative IAs was associated with the number of ECs given (OR per IA 1.9, P < 0.05). ABOi kidney transplant recipients have a high postoperative bleeding risk, correlating with the number of pre-operative IA sessions performed.
Asunto(s)
Sistema del Grupo Sanguíneo ABO/inmunología , Antígenos/química , Incompatibilidad de Grupos Sanguíneos , Trasplante de Riñón , Anticuerpos/química , Anticuerpos Monoclonales de Origen Murino/administración & dosificación , Estudios de Casos y Controles , Estudios de Cohortes , Transfusión de Eritrocitos , Femenino , Hemorragia , Humanos , Inmunoglobulinas/administración & dosificación , Inmunosupresores/química , Fallo Renal Crónico/inmunología , Fallo Renal Crónico/cirugía , Masculino , Persona de Mediana Edad , Análisis Multivariante , Ácido Micofenólico/administración & dosificación , Ácido Micofenólico/análogos & derivados , Recuento de Plaquetas , Prednisona/administración & dosificación , Rituximab , Tacrolimus/administración & dosificaciónRESUMEN
BACKGROUND: In order to make a well-considered decision and give informed consent about renal replacement therapy, potential living kidney donors and recipients should have sufficient understanding of the options and risks. PURPOSE: We aimed to explore knowledge about Dialysis & Transplantation (DT) and Living Donation (LD) among prospective living kidney donors and recipients. METHODS: Eighty-five donors and 81 recipients completed the Rotterdam Renal Replacement Knowledge-Test (R3K-T) 1 day before surgery. The questionnaire was available in various languages. RESULTS: Recipients knew significantly more about DT than donors (p < 0.001); donors knew more about LD than recipients (p < 0.001). A minority of donors (15 %) and recipients (17 %) had a score that was comparable to the knowledge level of the naïve general population. Recipients and donors knew less about DT and LD if their native language was not Dutch. In addition, recipients knew less about DT if they were undergoing pre-emptive transplantation. CONCLUSIONS: We conclude that recipients and donors retain different information. The decision to undergo living donation appears to be not always based on full knowledge of the risks. We recommend that professionals assess knowledge of prospective donors and recipients during the education process using the R3K-T, and extra attention is required for non-native speakers.