Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 5 de 5
Add filters

Document Type
Year range
Transplantation ; 106(9):S443-S443, 2022.
Article in English | Web of Science | ID: covidwho-2233650
American Journal of Transplantation ; 22(Supplement 3):873-874, 2022.
Article in English | EMBASE | ID: covidwho-2063475


Purpose: The global COVID-19 pandemic has significantly altered delivery of healthcare. Hospital resource utilization has been impacted on multiple levels including solid organ transplantation and overall access to transplant care. In the United States, significant regional variation and decreased living donor transplantation occurred during the initial 6 months of the pandemic. We examined the multi-year impact of COVID-19 on pediatric organ donation and transplantation. Method(s): Pediatric (<18 years of age) organ donation and transplant data was obtained from the Organ Procurement and Transplantation Network (OPTN). Data included pediatric donors after brain death (pDBD), donors after circulatory death (pDCD), living donors (LD), and recipient details including total number of transplants, waitlist deaths, and removals were reviewed between January 2019 to December 2021. Result(s): Total pediatric transplants performed in 2019, 2020, and 2021 were 1923, 1766, and 1890 (p=0.004) respectively. Organ specific data is outlined in Table 1. In 2019, 2020, and 2021, living donor transplantation accounted for 320, 288, and 311 (p=0.838) cases, while 1579, 1456, and 1552 (p=<0.0001) deceased donor allografts were utilized. There were 171, 176, and 209 pDCD and 746, 684, and 713 pediatric pDBD donors. Living donors across all recipient ages were 7391, 5725, and 6539. 2392, 2337, and 2430 pediatric patients were added to all organ waitlists during the study period. 2347, 2198, and 2288 children were removed from the waitlist with 93, 82, and 76 of those cases due to patient death. There was no statistically significant difference in the proportion of pediatric patients added to the waitlist vs those removed during 2019-2021 (p=0.505) Conclusion(s): Transplant volume transiently decreased in the first six months of the COVID-19 pandemic. However, transplantation rates in children, specifically abdominal organ transplantation, increased to nearly pre-pandemic levels in 2021. Lung transplants were significantly decreased during the study period. Pediatric donation remained relatively steady from 2019-2021. Living donor transplantation in children was significantly impacted in 2020. Waitlist additions/removals remained consistent throughout the study period. (Table Presented).

American Journal of Transplantation ; 22(Supplement 3):483, 2022.
Article in English | EMBASE | ID: covidwho-2063388


Purpose: It has been proposed that patients with intestinal failure (IF) and intestine transplant (IT) are at higher risk of severe complications of COVID-19 due to weakened immunity and comorbidities. Multidisciplinary teams had to adapt their clinical approaches in order to keep these patients as safe as possible during the pandemic. Data is lacking. Method(s): Retrospective, observational, multicenter study performed with 3 surveys to assess COVID-19 practice changes in IF and IT patients. Result(s): 17 centers were included in the analysis;six had a 3 (+/- 4) months moratorium on performing transplant. Nine delayed their routine follow up including "protocol" biopsies. Nine reported decrease in new referrals. Sixteen incorporated telemedicine. Two reported rehabilitation services (home health, PN deliveries) being affected. In the first survey, 10 centers (59%) reported having IF and IT patients with COVID-19. In the other 2 surveys, a total of 25 IF and IT patients were reported positive for COVID-19. Of the 11 IF patients, 8 were male;7 were adults, with a mean age of 60 (+/- 8) years. Nine of them were symptomatic at presentation, with the most prevalent symptoms being fever/chills, cough and sore throat;hospitalization was required in 45.5%, all patients survived. A total of 14 IT patients were positive;8 were female;all of them were adults, mean age: 47 (+/- 16) years. All of them were symptomatic at presentation, with the most prevalent symptoms being fever/chills, dyspnea and cough. Hospitalization was required in 50%. Immunosuppression was discontinued in 1 patient, decreased in 5 (all on tacrolimus), and left unchanged in 8 cases;3 patients (21%) died. Conclusion(s): Many aspects of healthcare have been impacted by the COVID-19 pandemic. Centers adapted to new paradigms in patient care. Despite the availability of telemedicine, hospitals that treat IF and IT patients have found difficulties to sustain an appropriate home care regimen and referrals. IF patients did not have increased mortality, but IT recipients did, with similar results to those reported for other solid organs.

American Journal of Transplantation ; 21(SUPPL 4):293, 2021.
Article in English | EMBASE | ID: covidwho-1494415


Purpose: We assessed whether COVID-19-risk is enhanced by chronic immunosuppression, and is associated with suppressor cells. Methods: We tested 66 COVID-19 patients, including 26 with solid organ transplants at median 11 days after diagnosis, and 64 unexposed healthy subjects including 21 with transplants, who were sampled pre-pandemic. T- and B-cells, which express CD154 were measured after stimulation with peptide mixtures representing the spike protein S, its conserved C-terminal S2, and less conserved N-terminal S1 components. Monocytic myeloid-derived suppressor cells (M-MDSC) were measured in an independent cohort of 47 COVID-19 patients Results: Frequencies (%) of S-reactive T-cells (Mean±SEM 2.0±0.3 vs 3.8±0.3, p=5.6E-05) and B-cells (3.0±0.4 vs 5.1±0.4, p=0.0003) were significantly lower in COVID-19 compared with healthy subjects, but were measurable in all samples. Transplanted and non-transplanted subjects demonstrated similar within group frequencies of S-reactive T-cells (4.1±0.3 vs 3.7±0.5, p=NS in healthy and 1.5±0.4 vs 2.4±0.3, p=NS in the COVID-19 group) and other S-reactive cells. Among COVID-19 patients, intubated patients showed lower S-reactive CD8 frequencies compared with non-intubated patients. (1.4±0.5 vs 3.5±0.5, p=0.003). In logistic regression analysis using training and test sets, S-reactive CD3 and CD8 cells, age, race, and transplantation status distinguished COVID-19 from healthy subjects (test set negative and positive predictive values 75% and 85% respectively, AUC 0.9). Among 66 COVID-19 patients, S-reactive CD8 cells and age predicted respiratory failure with NPV 62%, PPV 86%, AUC 0.73. S2-reactive T-cells demonstrated similar predictive performance. S1 antigen elicited minimal cellular responses. Transplanted COVID-19 patients show lower cytomegalovirus-specific CD154+CD3 frequencies compared with non-transplanted patients (0.5±0.1 vs 1.3±0.2, p=0.006). Frequencies of CD14+CD33+CD11b+HLADR-ve M-MDSC (14.5±2.9 vs 3.3±1.5, p=0.002) were higher in 47 independent COVID-19 patients compared with 6 healthy subjects. Conclusions: Conserved SARS-CoV-2-spike antigen drives T-cell immunity to COVID-19 in unexposed transplanted and non-transplanted subjects. This immunity declines with COVID-19 infection, is accompanied by increased myeloid derived suppressor cells, and can predict infection-risk and disease severity. Transplant patients demonstrate increased COVID-19-risk and co-infection-risk.

Transplantation ; 105(7 SUPPL 1):S11-S12, 2021.
Article in English | EMBASE | ID: covidwho-1306037


Introduction: On January 30, 2020 the World Health Organization (WHO) declared the 2019-CoV outbreak in China as a global public health emergency and subsequently, a pandemic on March 11th. It was considered that intestinal failure and intestinal transplant patients might have a higher risk of severe complications from the COVID-19 disease, multidisciplinary intestinal failure teams had to adapt their clinical approaches in order to keep this vulnerable group of patients as safe as possible during the pandemic;but data was lacking. Therefore, in order to improve our knowledge, we designed a voluntary, international survey aiming to address the impact of the COVID-19 disease in intestinal failure and transplant patients worldwide. Patient and Methods: A retrospective, observational, multicenter survey was sent to all centers registered at the Intestinal Rehabilitation and Transplant Association (IRTA). The survey contained three modules: the 1st one consisted of 14 questions about the hospital's activity during the COVID-19 pandemic. The 2nd one, contained 43 questions, was about intestinal failure patient management and outcome and the 3rd one (52 questions) focused on intestinal transplant patients. We used the Google Form platform. We aim to present the preliminary results of the first module. Statistical analysis was performed with the IBM SPSS Statistic version 25.0® program. Results: 13/42 (41%) centers responded;including centers from France, Netherlands, Italy, United States, UK, Sweden, Germany and Argentina. Only 2 centers reported moratorium on intestinal (IT) or multivisceral transplant (MVT), with a mean of 3 months (±4) [Table 1]. Since the pandemic started, 2 institutions reported 4 patients with intestinal rehabilitation or on TPN diagnosed with COVID-19 while 7 centers hospitals claimed to have had 9 patients post-IT/MTV affected by the disease. While 7 centers had their routine follow up and 'protocol biopsies' in the post-IT/MTV affected, none reported higher rates of rejection or complications. At the same time, 8 centers (77%) were affected by a mean of 15% decrease in referrals for new evaluations of intestinal failure or transplantation (compared to 2019) [Figure 1]. All centers adapted to utilizing telemedicine to follow up on IT/MVT patients Conclusions: Many aspects of healthcare have been impacted by the COVID-19 pandemic. The survey showed that the number of affected patients has been lower than expected, the reduced number of centers required transient moratorium of their activity, but a secondary observation was that despite the availability of telemedicine, and probably related to the lockdown, there has been a significant reduction in the referrals for evaluation of intestinal failure and transplant patients, that may have the deleterious effect of the delay of treatment in health care system.