Proton Pump Inhibitors Use in Kidney Transplant Recipients: A Population-Based Study

Background

Kidney transplant recipients are commonly prescribed proton-pump inhibitors (PPIs), but due to concern for polypharmacy, chronic use should be limited.

Objective

The objective was to describe PPI use in kidney transplant recipients beyond their first year of transplant to better inform and support deprescribing initiatives.

Design

We conducted a retrospective, population-based cohort study using linked health care databases.

Setting

This study was conducted in Alberta, Canada.

Patients

We included all prevalent adult, kidney-only transplant recipients between April 2008 and December 2017 who received their transplant between May 2002 and December 2017.

Measurements

The primary outcome was ongoing or new PPI use and patterns of use, including frequency and duration of therapy, and assessment of indication for PPI use.

Methods

We ascertained baseline characteristics, covariate information, and outcome data from the Alberta Kidney Disease Network (AKDN). We compared recipients with evidence of a PPI prescription in the 3 months prior to study entry to those with a histamine-2-receptor antagonist (H2Ra) fill and those with neither.

Results

We identified 1823 kidney transplant recipients, of whom 868 (48%) were on a PPI, 215 (12%) were on an H2Ra, and 740 (41%) were on neither at baseline. Over a median follow-up of 5.4 years (interquartile range [IQR] = 2.6-9.3), there were almost 45 000 unique PPI prescriptions dispensed, the majority (80%) of which were filled by initial PPI users. Recipients who were on a PPI at baseline would spend 91% (IQR = 70-98) of their graft survival time on a PPI in follow-up, and nephrologists were the main prescribers. We identified an indication for ongoing PPI use in 54% of recipients with the most common indication being concurrent antiplatelet use (26%).

Limitations

Our kidney transplant recipients have access to universal health care coverage which may limit generalizability. We identified common gastrointestinal indications for PPI use but did not include rare conditions due to concerns about the validity of diagnostic codes. In addition, symptoms suggestive of reflux may not be well coded as the focus of follow-up visits is more likely to focus on kidney transplant.

Conclusions

Many kidney transplant recipients are prescribed a PPI at, or beyond, the 1-year post-transplant date and are likely to stay on a PPI in follow-up. Almost half of the recipients in our study did not have an identifiable indication for ongoing PPI use. Nephrologists frequently prescribe PPIs to kidney transplant recipients and should be involved in deprescribing initiatives to reduce polypharmacy.

Progression of Kidney Disease in Kidney Transplant Recipients With a Failing Graft: A Matched Cohort Study

Background

Few studies have assessed outcomes in transplant recipients with failing grafts as most studies have focused on outcomes after graft loss.

Objective

To determine whether renal function declines faster in kidney transplant recipients with a failing graft than in people with chronic kidney disease of their native kidneys.

Design

Retrospective cohort study.

Setting

Alberta, Canada (2002-2019).

Patients

We identified kidney transplant recipients with a failing graft (2 estimated glomerular filtration rate [eGFR] measurements 15-30 mL/min/1.73 m2 ≥90 days apart).

Measurements

We compared the change in eGFR over time (eGFR with 95% confidence limits, LCLeGFRUCL) and the competing risks of kidney failure and death (cause-specific hazard ratios [HRs], LCLHRUCL).

Methods

Recipients (n = 575) were compared with propensity-score-matched, nontransplant controls (n = 575) with a similar degree of kidney dysfunction.

Results

The median potential follow-up time was 7.8 years (interquartile range, 3.6-12.1). The hazards for kidney failure (HR1.101.331.60) and death (HR1.211.592.07) were significantly higher for recipients, while the eGFR decline over time was similar (recipients vs controls: -2.60-2.27-1.94 vs -2.52-2.21-1.90 mL/min/1.73 m2 per year). The rate of eGFR decline was associated with kidney failure but not death.

Limitations

This was a retrospective, observational study, and there is a risk of bias due to residual confounding.

Conclusions

Although eGFR declines at a similar rate in transplant recipients as in nontransplant controls, recipients have a higher risk of kidney failure and death. Studies are needed to identify preventive measures to improve outcomes in transplant recipients with a failing graft.

Effectiveness of a Web-Based eHealth Portal for Delivery of Care to Home Dialysis Patients: A Single-Arm Pilot Study

Background

Improving a patient's experience with their care through an online interface for communication (an eHealth patient portal) has been shown to be beneficial in some studies of chronic disease populations. However, little is known about the effectiveness of an eHealth portal for delivery of care to home dialysis patients.

Objectives

Primary: To determine whether an eHealth portal is effective at improving a patient's experience with their home dialysis care. Secondary: (1) To determine whether an eHealth portal improves health-related quality of life for home dialysis patients, (2) to assess patient satisfaction with an eHealth portal and perceived impact on aspects of their home dialysis therapy and health, (3) to determine the acceptability of the eHealth portal software, and (4) to determine the change in telephone usage for communication after patient adoption of an eHealth portal.

Design

Single-arm pilot trial with recruitment over a 4-month period.

Setting

The multidisciplinary home dialysis clinic in Halifax Nova Scotia Canada.

Patients

Adults (>18 years) receiving either home hemodialysis or peritoneal dialysis.

Measurements

Consumer quality index (CQI), health-related quality of life using the EuroQol Five Dimensions Questionnaire (EQ-5D), acceptability of the eHealth portal software (using the Acceptability E-scale), and satisfaction/perceived impact (using a modified questionnaire).

Methods

A web-based application (McKesson, Canada, RelayHealth®) allowed patients and health care workers to communicate through a secure, password-protected online portal that permitted visualization of the messaging history by patient and provider. Patients and the home dialysis health care team had the ability to send messages related to patient care at any time including proposed changes to medication, instructions after a clinic visit, times of new appointments, upcoming investigations, or questions about care. Patient experience with home dialysis care using the CQI, health-related quality of life using the EQ-5D, acceptability of the eHealth portal software, and satisfaction/perceived impact were assessed at baseline, 6, and 12 months of follow-up (where applicable). Total minutes of telephone communication was assessed prior to and after adoption of the portal.

Results

Of the 41 patients who consented to join the portal, 27 (66%) created an online account. At baseline, patients had a positive experience for the care and communication provided by their nephrologist (CQI: 3.63, 95% confidence interval [CI]: 3.50-3.76) and this did not change significantly over the study period. Similar results were observed for the care provided by other nephrology health care team members. Health-related quality of life using the EQ-5D score was 0.80 (interquartile range [IQR]: 0.71-0.83) at baseline and this also did not significantly change over the study period. Patients were satisfied with the eHealth portal (mean Likert scale score of 6.5 ± 0.6 in overall satisfaction, scale ranging from 1 completely dissatisfied to 10 completely satisfied), but only a minority (N = 12) completed a satisfaction questionnaire. Median monthly phone usage decreased from 12.5 to 10 minutes (P = .02) after adoption of the portal.

Limitations

The study is limited by the small sample size, high rate of patient dropout, and limited response rate.

Conclusions

In this study of home dialysis patients, we identified that an eHealth communication did not lead to significant improvements in patient experience with home dialysis care.

Trial Registration

ClinicalTrials.gov number NCT02128347.

Delayed photosensitivity in a child with erythropoietic protoporphyria : a case report

Erythropoietic protoporphyria (EPP) is a genetically inherited disease that causes protoporphyrin accumulation in erythrocytes, skin, liver, bile, and stool. Clinically this manifests as photosensitivity with painful, edematous cutaneous porphyria. We present the case of a four-year-old boy with a delayed photosensitivity reaction to sunlight. In the evening following sun exposure, he would develop swelling and a violaceous rash on the dorsal surface of his hands and occasionally the helix of his ears. His reactions were severe, requiring morphine on more than one occasion prior to diagnosis. He later developed waxy depressed scars on his nose and cheeks. On laboratory investigation, both total and free protoporphyrin were elevated. Photosensitivity in EPP usually occurs minutes after sun exposure, but our patient had significantly delayed reactions. Genetic testing revealed mutation in the FECH gene that confirmed the diagnosis of EPP. Although rare, presentations of photosensitivity in the pediatric population should be carefully evaluated.

Strategies to reduce clinical inertia in hypertensive kidney transplant recipients

BACKGROUND

Many kidney transplant recipients have hypertension. Elevated systolic blood pressures are associated with lower patient and kidney allograft survival.

METHODS

This retrospective analysis examined the prevalence of clinical inertia (failure to initiate or increase therapy) in the treatment of hypertension before and after the introduction of an automated device (BpTRU) in the kidney transplant clinic.

RESULTS

Historically only 36% (49/134) of patients were prescribed a change in therapy despite a systolic blood pressure > or = 130 mmHg. After the introduction of BpTRU, 56% (62/110) of the patients had a change in therapy. In a multivariate logistic regression analysis of the entire cohort (n = 244) therapeutic changes were associated with higher blood pressures (OR 1.08 per mmHg, 95% CI 1.04-1.12) and use of the BpTRU (OR 2.12, 95% CI 1.72-3.83). In addition patients on more medications were also more likely to have a change in therapy.

CONCLUSION

Blood pressure measurement with automated devices may help reduce clinical inertia in the kidney transplant clinic.