Publications by authors named "Waldram M"

Introduction And Hypothesis: The objective was to study the effect of immediate pre-operative warm-up using virtual reality simulation on intraoperative robot-assisted laparoscopic hysterectomy (RALH) performance by gynecology trainees (residents and fellows).

Methods: We randomized the first, non-emergent RALH of the day that involved trainees warming up or not warming up. For cases assigned to warm-up, trainees performed a set of exercises on the da Vinci Skills Simulator immediately before the procedure.

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  • - The study examined the complications of kidney transplants in incompatible living donor recipients (ILDKTr) who have donor-specific antibodies (DSA) compared to compatible living donor recipients (CLDKTr), focusing on the risks of delayed graft function (DGF) and acute rejection (AR).
  • - Results showed that AR rates were significantly higher in ILDKTr groups with stronger DSA, while DGF rates were slightly elevated but had no greater mortality impact when compared to CLDKTr groups.
  • - The findings suggest that healthcare providers need to assess these risks during pre-surgery discussions and implement strategies to minimize complications in ILDKTr patients.
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Unlabelled: The framework currently used for living kidney donor selection is based on estimation of acceptable donor risk, under the premise that benefits are only experienced by the recipient. However, some interdependent donors might experience tangible benefits from donation that cannot be considered in the current framework (ie, benefits experienced directly by the donor that improve their daily life, well-being, or livelihood).

Methods: We conducted semistructured interviews with 56 living kidney donors regarding benefits experienced from donation.

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Background: Live kidney donors (LKDs) account for nearly a third of kidney transplants in the United States. While donor nephrectomy poses minimal post-surgical risk, LKDs face an elevated adjusted risk of developing chronic diseases such as hypertension, diabetes, and end-stage renal disease. Routine screening presents an opportunity for the early detection and management of chronic conditions.

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  • Desensitization has facilitated incompatible living donor kidney transplants, but increased intensity correlates with a heightened risk of infections.
  • In a study involving 475 recipients, infection rates rose significantly with desensitization intensity, reaching 73.5% in those with high-intensity desensitization.
  • The most frequent infections included urinary tract infections and opportunistic infections, leading to longer hospital stays and greater risks of graft loss in patients with multiple infections.
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Purpose: We offer collagenase Clostridium histolyticum (CCH) injections to all patients with a Dupuytren contracture and a palpable cord. We assessed whether more severe contractures respond less well or recur more frequently.

Methods: From a database of 502 CCH injections, 386 (77%) had a complete dataset with minimum 1-year face-to-face follow-up.

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Rationale & Objective: Compared with recipients of blood group ABO-compatible (ABOc) living donor kidney transplants (LDKTs), recipients of ABO-incompatible (ABOi) LDKTs have higher risk for graft loss, particularly in the first few weeks after transplantation. However, the decision to proceed with ABOi LDKT should be based on a comparison of the alternative: waiting for future ABOc LDKTs (eg, through kidney paired exchange) or for a deceased donor kidney transplant (DDKT). We sought to evaluate the patient survival difference between ABOi LDKTs and waiting for an ABOc LDKT or an ABOc DDKT.

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  • * Results showed that a majority were open to receiving both living (87%) and deceased (84%) HIV+ donor organs, despite some concerns about risks like HIV superinfection.
  • * Acceptance of HIV+ organs was higher among candidates from centers with prior HIV D+/R+ transplants, suggesting that experience may boost confidence in the safety of these transplants.
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Simple (Bosniak I) renal cysts are considered acceptable in living kidney donor selection in terms of cancer risk. However, they tend to increase in number and size over time and might compromise renal function in donors. To clarify their implications for long-term renal function, we characterized the prevalence of renal cysts in 454 individuals who donated at our center from 2000 to 2007.

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  • Desensitization protocols for HLA-incompatible living donor kidney transplantation (ILDKT) differ among transplant centers, but their effects on patient outcomes are not well understood.
  • A study involving 1,358 ILDKT recipients across 25 centers aimed to analyze variations in post-transplant mortality and graft loss, finding minimal differences attributable to the centers themselves.
  • Results showed that only a few centers had notably different outcomes, leading to the conclusion that ILDKT practices across diverse centers appear effective without significant negative impact on patient outcomes.
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Background: Optimizing antithymocyte globulin (ATG) dosage is critical, particularly for high-risk kidney transplant (KT) recipients without cytomegalovirus (CMV) prophylaxis.

Methods: We studied 630 KT recipients with expanded criteria donors or panel reactive antibody ≥50% at Hospital do Rim, Brazil (January 1, 2013 to May 21, 2015) to determine whether a single ATG dose was safe and effective in patients without CMV prophylaxis. Patients received ≥4 doses (1-1.

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  • Plant traits, which include various characteristics like morphology and physiology, play a crucial role in how plants interact with their environment and impact ecosystems, making them essential for research in areas like ecology, biodiversity, and environmental management.
  • The TRY database, established in 2007, has become a vital resource for global plant trait data, promoting open access and enabling researchers to identify and fill data gaps for better ecological modeling.
  • Although the TRY database provides extensive data, there are significant areas lacking consistent measurements, particularly for continuous traits that vary among individuals in their environments, presenting a major challenge that requires collaboration and coordinated efforts to address.
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Although minimized by expert evaluation, operative technique, and postoperative care, the extremely low risk of perioperative mortality following living kidney or liver donation will never be eliminated. Furthermore, anticipation of poor donor outcome may simultaneously be a source of anxiety for physicians and programs and also be a circumstance for which they are unprepared. We conducted a national survey of US transplant surgeons to understand experiences with and systemic preparedness for the event of a living donor death.

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Background And Objectives: The risk of hypertension attributable to living kidney donation remains unknown as does the effect of developing postdonation hypertension on subsequent eGFR. We sought to understand the association between living kidney donation, hypertension, and long-term eGFR by comparing donors with a cohort of healthy nondonors.

Design, Setting, Participants, & Measurements: We compared 1295 living kidney donors with median 6 years of follow-up with a weighted cohort of 8233 healthy nondonors.

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Background And Objectives: Hypertension in older kidney donor candidates is viewed as safe. However, hypertension guidelines have evolved and long-term outcomes have not been explored. We sought to quantify the 15-year risk of ESKD and mortality in older donors (≥50 years old) with versus those without hypertension.

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Background: United States transplant centers are required to report follow-up data for living kidney donors for 2 years post-donation. However, living kidney donor (LKD) follow-up is often incomplete. Mobile health (mHealth) technologies could ease data collection burden but have not yet been explored in this context.

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Purpose: Automatically segmenting and classifying surgical activities is an important prerequisite to providing automated, targeted assessment and feedback during surgical training. Prior work has focused almost exclusively on recognizing gestures, or short, atomic units of activity such as pushing needle through tissue, whereas we also focus on recognizing higher-level maneuvers, such as suture throw. Maneuvers exhibit more complexity and variability than the gestures from which they are composed, however working at this granularity has the benefit of being consistent with existing training curricula.

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The number of live kidney donors has declined since 2005. This decline parallels the evolving knowledge of risk for biologically related, black, and younger donors. To responsibly promote donation, we sought to identify declining low-risk donor subgroups that might serve as targets for future interventions.

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Background: Neighborhood poverty has been associated with worse outcomes after live donor kidney transplantation (LDKT), and prior work suggests that women with kidney disease may be more susceptible to the negative influence of poverty than men. As such, our goal was to examine whether poverty differentially affects women in influencing LDKT outcomes.

Methods: Using data from the Scientific Registry of Transplant Recipients and US Census, we performed multivariable Cox regression to compare outcomes among 18 955 women and 30 887 men who received a first LDKT in 2005-2014 with follow-up through December 31, 2016.

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Background: Every year, more than 5500 healthy people in the United States donate a kidney for the medical benefit of another person. The Organ Procurement and Transplantation Network (OPTN) requires transplant hospitals to monitor living kidney donors (LKDs) for 2 years postdonation. However, the majority (115/202, 57%) of transplant hospitals in the United States continue to fail to meet nationally mandated requirements for LKD follow-up.

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Background: As transplant centers start leveraging Twitter for information dissemination and public engagement, it is important to understand current living solid organ donation-related Twitter use.

Methods: We identified public Twitter profiles available in 01/2017 that referenced living organ donation and analyzed the use of donation-related Twitter handles, names, or profile information. Tweets were manually abstracted and qualitatively analyzed for common themes.

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Historically, exception points for hepatocellular carcinoma (HCC) led to higher transplant rates and lower waitlist mortality for HCC candidates compared to non-HCC candidates. As of October 2015, HCC candidates must wait 6 months after initial application to obtain exception points; the impact of this policy remains unstudied. Using 2013-2017 SRTR data, we identified 39  350 adult, first-time, active waitlist candidates and compared deceased donor liver transplant (DDLT) rates and waitlist mortality/dropout for HCC versus non-HCC candidates before (October 8, 2013-October 7, 2015, prepolicy) and after (October 8, 2015-October 7, 2017, postpolicy) the policy change using Cox and competing risks regression, respectively.

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Background: In 2013, the Organ Procurement and Transplantation Network began requiring transplant centers in the United States to collect and report postdonation living kidney donor follow-up data at 6 months, 1 year, and 2 years. Despite this requirement, <50% of transplant centers have been able to collect and report the required data. Previous work identified a number of barriers to living kidney donor follow-up, including logistical and administrative barriers for transplant centers and cost and functional barriers for donors.

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Background: Previous studies have reported a wide range of prevalence of post-donation anxiety, depression, and regret in living kidney donors (LKDs). It is also unclear what risk factors are associated with these outcomes.

Methods: We screened 825 LKDs for anxiety and depression using 2-item GAD-2 and PHQ-2 scales and asked about regret.

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Background: Many kidneys are discarded every year, with 3631 kidneys discarded in 2016 alone. Identifying kidneys at high risk of discard could facilitate "rescue" allocation to centers more likely to transplant them. The Probability of Delay or Discard (PODD) model was developed to identify marginal kidneys at risk of discard or delayed allocation beyond 36 hours of cold ischemia time.

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