Characterization of waiting times in a simulation of kidney paired donation

Living kidney organ donation: experiences of spousal support of donors

AIM

The purpose of this study was to explore the process of living kidney donation as experienced by husbands of donors to aid nurses and all members of the health care team in promoting informed consent for those considering living donation and to promote the well being of spouses of living donors, donors and their families.

BACKGROUND

The attitudes of husbands of living kidney donors may affect their decision to donate and satisfaction with recovery from donation surgery, thus it is critical to know how husbands of living kidney donors view kidney donation.

METHODS

Eleven male spouses of living kidney donors were interviewed three months following their wife's donation. Grounded theory methodology was used to inaugurate a substantive theory that describes living kidney donation and its impact on the spousal relationship and family, as experienced by the husband of a donor.

RESULTS

The result of the data analysis was a substantive theory pertaining strictly to the husbands' experiences as the spouse of the living kidney donor. The process commenced with scheduling of the living donation followed by the postoperative time frame, including bringing the donor wife home. The core variable, 'Fulfilling Your Vows', described attitudes, behaviours and actions that guided husbands in successfully and generously caring for their wives, their families, the recipients and themselves throughout the living kidney donation process and continuing 'to this day'.

RELEVANCE TO CLINICAL PRACTICE

The substantive theory of 'Fulfilling Your Vows' will guide nurses and other transplant specialists in helping to improve fully informed consent of potential donors before surgery and in developing supportive strategies to maximize spouse, donor and family outcomes throughout the transplantation process.

ABO-incompatible transplantation: less may be more

Many have reported success with ABO-incompatible kidney transplantation using B-cell ablative therapies such as anti-CD20 and splenectomy. However, splenectomy and anti-CD20 is associated with an increased risk of infection. We show how ABO-incompatible kidney transplants can be accomplished with a low risk of antibody-mediated rejection and graft loss using plasmapheresis preconditioning, low-dose intravenous immunoglobulin, and standard maintenance immunosuppression. The mean follow up for our cohort of 53 patients is 2 years. The mean creatinine clearance at 1 and 3 years is 58 mL/min and 63 mL/min, predicting excellent long-term function. Only long-term follow up of these patients will render definitive answers, however, these data demonstrate that ABO-incompatible kidney transplantation increases the donor pool by providing live donor kidneys that function promptly with minimal risk of early loss. This can be accomplished with a modest, brief escalation of immunosuppression and at a lower cost to the health care system than maintaining the patient on dialysis.

Predicting joint replacement waiting times

Currently, the median waiting time for total hip and knee replacement in Ontario is greater than 6 months. Waiting longer than 6 months is not recommended and may result in lower post-operative benefits. We developed a simulation model to estimate the proportion of patients who would receive surgery within the recommended waiting time for surgery over a 10-year period considering a wide range of demand projections and varying the number of available surgeries. Using an estimate that demand will grow by approximately 8.7% each year for 10 years, we determined that increasing available supply by 10% each year was unable to maintain the status quo for 10 years. Reducing waiting times within 10 years required that the annual supply of surgeries increased by 12% or greater. Allocating surgeries across regions in proportion to each region's waiting time resulted in a more efficient distribution of surgeries and a greater reduction in waiting times in the long-term compared to allocation strategies based only on the region's population size.

The impact of accepting living kidney donors with mild hypertension or proteinuria on transplantation rates

BACKGROUND

As waiting times for kidney transplantation increase, individuals with hypertension or proteinuria may be considered as eligible living donors. We set out to determine how frequently donors are excluded because of hypertension or proteinuria and to what extent accepting such donors would increase transplantation rates.

METHODS

Wait lists from 4 Canadian transplantation centers were examined for causes of living kidney donor exclusion. Donors with hypertension (clinic blood pressure >140/90 mm Hg or requiring antihypertensive medication) or proteinuria historically have been excluded at these centers. We define potentially acceptable hypertension as a clinic blood pressure less than 150/100 mm Hg or less than 140/90 mm Hg if administered a single antihypertensive medication and define acceptable proteinuria as protein of 0.15 to 0.3 g/d.

RESULTS

Only 35% (124 of 352 patients) of wait-listed patients had a living donor evaluated (n = 180 potential donors). Primary reasons for donor exclusion were immunologic: a positive cross-match (32%; n = 59) or blood group type incompatibility (22%; n = 40). Hypertension or proteinuria were less common (17%; n = 31). Of 31 donors excluded for hypertension or proteinuria, only 13 had results in the acceptable range. Acceptance of these donors would have resulted in transplantation of 3% (12 of 352 patients) of the wait-list population.

CONCLUSION

Accepting living donors with mild hypertension and proteinuria will lead to a slight increase in transplantation rates. Efforts to improve living donor awareness and overcome immunologic barriers to transplantation may have a greater impact.