Pharmacologic Treatment of Common Symptoms in Dialysis Patients: A Narrative Review

Pharmacological Treatment for Dialysis-Related Muscle Cramps: A Systematic Review

BACKGROUND

Patients with end-stage renal disease undergoing dialysis suffer from muscle cramps, a prevalent and burdensome symptom for which there is a paucity of efficient and safe treatments.

AIM

What is the efficacy and safety of pharmacological interventions for the treatment of dialysis-related muscle cramps?

DESIGN

A systematic review was conducted in OVID, CINAHL, PubMed, Web of Science, and Central Cochrane databases up to August 25, 2023.

DATA SOURCES

Experimental studies reporting on a pharmacological intervention for the treatment of dialysis-related muscle cramps were included. The review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis, and the studies quality was assessed with the RoB2 tool.

RESULTS

A total of 4660 studies were retrieved, and 13 articles were included. The studies reported on nine interventions: vitamin C, vitamin E, vitamin K2, vitamin B7, dextrose solutions, gabapentin, sodium chloride, creatine monohydrate, and L-carnitine. The studies testing L-carnitine and creatine monohydrate were the only ones deemed to have a low risk of bias. Side effects were reported in only two trials, consisting primarily of gastrointestinal discomfort and hyperglycemia. Vitamins C and E are the two most studied interventions that showed positive results in reducing the frequency, severity, and duration of dialysis-related muscle cramps. L-carnitine is a promising intervention that warrants further investigation.

CONCLUSION

Our review consolidates the existing evidence, elucidating the range of treatments along with their potential benefits and limitations. Future studies should uphold high-quality standards, incorporate patient-reported outcomes, and utilize well-defined, robust samples to improve patient care.

Patient Perspectives of Skeletal Muscle Cramping in Dialysis: A Focus Group Study

Key Points

This first step demonstrated content validity for a patient-reported outcome measure for skeletal muscle cramping in dialysis. This work lays the foundation for developing a patient-reported outcome measure for regulatory use to assess skeletal muscle cramping in people receiving dialysis.

Background

Skeletal muscle cramping is a common, painful, and debilitating symptom experienced by people receiving dialysis. Neither a standardized, patient-endorsed definition of skeletal muscle cramping nor full understanding of patients' perspectives of skeletal muscle cramping exist. We conducted focus groups, within a Kidney Health Initiative (KHI) project, to elicit skeletal muscle cramping experiences of people receiving dialysis as the basis for patient-reported outcome measure (PROM) development.

Methods

Eligible participants (English-speaking adults aged 18–85 years treated by dialysis and a skeletal muscle cramping episode within 30 days) were purposively recruited from a panel (L&E Research) of people receiving dialysis at home or in-center. Standard qualitative methods were used to conduct virtual 90-minute sessions discussing the following: skeletal muscle cramping clinical characteristics, participants' skeletal muscle cramping experiences, and feedback on a draft skeletal muscle cramping definition and a patient-facing conceptual model developed by the KHI project workgroup. We used qualitative thematic analysis.

Results

There were 20 diverse participants in three focus groups. Universally experienced skeletal muscle cramping attributes differed by dialysis setting in onset, worst pain rating, duration, and timing. Variably experienced attributes (applied to home and in-center dialysis) were gross and fine motor effect, sleep disruption, mood-related themes of fear, and annoyance/frustration/irritability. Avoidance/adaptive behaviors included reluctance or avoiding movement, adjusting what they ate or drink (e.g. , yellow mustard, pickles, pickle juice, and tonic water), heat application, massage, and cannabidiol use. The skeletal muscle cramping definition was endorsed, and insightful suggestions for conceptual model were collected.

Conclusions

This qualitative study of in-center and home patients' skeletal muscle cramping experiences identified universally and variably experienced attributes. The patient-endorsed skeletal muscle cramping definition can serve as a standard for assessment. These results provide the foundation to develop a PROM for regulatory use with people receiving maintenance dialysis who experience skeletal muscle cramping.

Efficacy, Safety, and Tolerability of Oral Furosemide Among Patients Receiving Hemodialysis: A Pilot Study

Introduction

Diuretic use may reduce volume-related complications in hemodialysis. We evaluated the efficacy, safety, and tolerability of furosemide in patients with hemodialysis-dependent kidney failure.

Methods

We conducted an open label, single-arm, 18-week, dose titration pilot study of oral furosemide (maximum dose 320 mg/day) among patients receiving maintenance hemodialysis who reported at least 1 cup of urine output per day. The primary efficacy outcome was an increase from baseline to a specified threshold of 24-hour urine volume, with the threshold based on baseline urine volume (<200 ml/day vs. ≥200 ml/day). Safety outcomes included hypokalemia and hypomagnesemia, and tolerability was assessed by prespecified patient-reported symptoms.

Results

Of the 39 participants, 28 (72%) received the expected furosemide dose, 3 (8%) underwent dose reduction, 5 (12%) discontinued furosemide without dose reduction, and 3 (8%) underwent dose reduction and subsequently discontinued furosemide. The median (quartile 1, quartile 3) baseline 24-hour urine volume was 290 ml (110, 740), and the maximum, average daily study furosemide dose ranged from 69 mg/day to 320 mg/d. The urine output efficacy outcome was met by 12 (33%), 11 (33%), and 7 (22%) participants at weeks 5, 12, and 18, respectively, in the intention-to-treat analysis, and by 12 (39%), 9 (35%), and 7 (28%) participants at weeks 5, 12, and 18, respectively, in the on-treatment analysis. There were no electrolyte, furosemide level, or patient-reported hearing change safety events.

Conclusion

Furosemide was generally safe and well tolerated, but only one-third of participants met the efficacy definition at week 5. The clinical importance of the efficacy findings is uncertain.

Peter WL, Logan D, Tentori F, Keller S, West M, Lacson E. Conceptual Framework for Patient-Reported Outcome Measures in Clinical Trials of Skeletal Muscle Cramping Experienced in Dialysis: A Kidney Health Initiative Workgroup Report

Skeletal muscle cramping is a common and bothersome symptom for patients on maintenance dialysis therapy, regardless of modality, and it has not been prioritized for innovative assessments or treatments. Research to prevent or treat skeletal muscle cramping in patients receiving dialysis is hindered by poorly understood pathophysiology, lack of an accepted definition, and the absence of a standardized measurement method. The Kidney Health Initiative, a public-private partnership between the American Society of Nephrology and US Food and Drug Administration, convened a multidisciplinary workgroup to define a set of patient-reported outcome measures for use in clinical trials to test the effect of new dialysis devices, new KRTs, lifestyle/behavioral modifications, and medications on skeletal muscle cramping. Upon determining that foundational work was necessary, the workgroup undertook a multistep process to elicit concepts central to developing the basis for demonstrating content validity of candidate patient-reported outcome measures for skeletal muscle cramping in patients on dialysis. The workgroup sought to (1) create an accepted, patient-endorsed definition for skeletal muscle cramping that applies to all dialysis modalities, (2) construct a conceptual model for developing and evaluating a skeletal muscle cramping-specific patient-reported outcome measure, and (3) identify potential questions from existing patient-reported outcome measures that could be modified or adapted and subsequently tested in the dialysis population. We report the results of the workgroup's efforts, provide our recommendations, and issue a call to action to address the gaps in knowledge and research needs we identified. These action steps are urgently needed to quantify skeletal muscle cramping burden, assess the effect, and measure meaningful changes of new interventions to improve the experience of patients receiving dialysis and suffering from skeletal muscle cramping.

Benefit of an Internet-Based Management System among Hemodialysis Patients at the Risk of Intradialytic Hypotension and Muscle Cramps: A Controlled before and after Study

BACKGROUND

The purpose of this study was to observe the impact of an internet-based management system on the incidence of intradialytic hypotension (IDH) and muscle cramps in hemodialysis patients.

METHODS

The patients, who underwent maintenance hemodialysis in the center from January 2018 to June 2020, were recruited and divided into the pre-intervention group (before operation of the internet-based hemodialysis management system, from January 2018 to December 2018) and intervention group (after operation of the system, from June 2019 to June 2020). The clinical outcomes were compared between groups.

RESULTS

The compound endpoint of >1 IDH or muscle cramps happened in 182 patients (61.7%) in the pre-intervention group and 99 participants (30.8%) in the intervention group (relative risk [RR] = 0.50 [95% confidence interval [CI], 0.42; 0.60]). IDH occurred in 122 patients (1-5 episodes in 47 patients, 6-10 episodes in 25 patients, and >10 episodes in 50 patients) and 33 patients (30 patients had 1-5 episodes and 3 patients had 6-10 episodes) before and after execution of the internet-based management system, respectively (RR = 0.25 [95% CI, 0.18; 0.35]). The incidence of muscle cramps was significantly decreased (RR = 0.57 [95% CI, 0.45; 0.73]) after the implementation of the system, and the number of patients with 6-10 episodes dropped from 10 to 1. Multivariate analyses also showed significantly lower RRs in the intervention group: 0.29 ([95% CI, 0.20; 0.41]) for IDH and 0.58 ([95% CI, 0.45; 0.74]) for muscle cramps. Compared with the pre-intervention, participants in the intervention group had a large improvement in self-management (p < 0.001) and self-efficacy (p < 0.001).

CONCLUSION

The study found that the internet-based hemodialysis management system was effective in reducing the IDH and muscle cramp events and improving self-management. It provided a significant implication for the development and application of internet-based programs in hemodialysis management.

Kidney Disease Symptoms before and after Kidney Transplantation

BACKGROUND AND OBJECTIVES

Patients with kidney failure report a high symptom burden, which likely increases while on dialysis due to physical and mental stressors and decreases after kidney transplantation due to restoration of kidney function.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

We leveraged a two-center prospective study of 1298 kidney transplant candidates and 521 recipients (May 2014 to March 2020). Symptom scores (0-100) at evaluation and admission for transplantation were calculated using the Kidney Disease Quality of Life Short-Form Survey, where lower scores represent greater burden, and burden was categorized as very high: 0.0-71.0; high: 71.1-81.0; medium: 81.1-91.0; and low: 91.1-100.0. We estimated adjusted waitlist mortality risk (competing risks regression), change in symptoms between evaluation and transplantation (n=190), and post-transplantation symptom score trajectories (mixed effects models).

RESULTS

At evaluation, candidates reported being moderately to extremely bothered by fatigue (32%), xeroderma (27%), muscle soreness (26%), and pruritus (25%); 16% reported high and 21% reported very high symptom burden. Candidates with very high symptom burden were at greater waitlist mortality risk (adjusted subdistribution hazard ratio, 1.67; 95% confidence interval, 1.06 to 2.62). By transplantation, 34% experienced an increased symptom burden, whereas 42% remained unchanged. The estimated overall symptom score was 82.3 points at transplantation and 90.6 points at 3 months (10% improvement); the score increased 2.75 points per month (95% confidence interval, 2.38 to 3.13) from 0 to 3 months, and plateaued (-0.06 points per month; 95% confidence interval, -0.30 to 0.18) from 3 to 12 months post-transplantation. There were early (first 3 months) improvements in nine of 11 symptoms; pruritus (23% improvement) and fatigue (21% improvement) had the greatest improvements.

CONCLUSIONS

Among candidates, very high symptom burden was associated with waitlist mortality, but for those surviving and undergoing kidney transplantation, symptoms improved.

Needle dislodgement in hemodialysis patients: Progress in prevention and early intervention

Needle dislodgement during hemodialysis is a potentially lethal accident that, although rare, has yet to be completely eliminated in clinical dialysis. Fatal hemorrhaging can occur with the loss of proper needle positioning due to the continuously running pump of the dialysis machine. Cooperative efforts by medical professionals, scientists, and related industries have been made to remove all such risks. In this review, we highlight the recommended practices summarized by professional associations and recent progress regarding the research and development of auxiliary equipment for dialysis nursing aimed at preventing and/or providing early intervention for needle dislodgement.

Effectiveness and safety profiling of zolpidem and acupressure in CKD associated pruritus: An interventional study

BACKGROUND

Chronic kidney disease (CKD)-associated pruritus (CKD-aP) contributes to poor quality of life, including reduced sleep quality and poor sleep quality is a source of patient stress and is linked to lower health-related quality of life. This study aimed to investigate the effectiveness of zolpidem 10 mg and acupressure therapy on foot acupoints to improve the sleep quality and overall quality of life among hemodialysis patients suffering from CKD-aP.

METHOD

A multicenter, prospective, randomized, parallel-design, open label interventional study to estimate the effectiveness of zolpidem (10 mg) oral tablets versus acupressure on sleep quality and quality of life in patients with CKD-aP on hemodialysis. A total of 58 hemodialysis patients having sleep disturbance due to CKD-aP completed the entire 8-week follow-up. The patients were divided into a control (acupressure) group of 28 patients and an intervention (zolpidem) group of 30 patients.

RESULTS

A total of 58 patients having CKD-aP and sleep disturbance were recruited. In the control group there was a reduction in the PSQI score with a mean ± SD from 12.28 ± 3.59 to 9.25 ± 3.99, while in the intervention group the reduction in PSQI score with a mean ± SD was from 14.73 ± 4.14 to 10.03 ± 4.04 from baseline to endpoint. However, the EQ5D index score and EQ-visual analogue scale (VAS) at baseline for the control group with a mean ± SD was 0.49 ± 0.30 and 50.17 ± 8.65, respectively, while for the intervention group the values were 0.62 ± 0.26 and 47.17 ± 5.82, respectively. The mean EQ5D index score in the control group improved from 0.49 ± 0.30 to 0.53 ± 0.30, but in the intervention group there was no statistical improvement in mean EQ5D index score from 0.62 ± 0.26 to 0.62 ± 0.27 from baseline to week 8. The EQ 5D improved in both groups and the EQ-VAS score was 2.67 points higher at week 8 as compared to baseline in the control group, while in the intervention group the score was 3.33 points higher at week 8 as compared to baseline. Comparing with baseline, the PSQI scores were significantly reduced after week 4 and week 8 (P =  < .001). Furthermore, at the end of the study, the PSQI scores were significantly higher in the control as compared to the intervention group (P = .012).

CONCLUSION

An improvement in sleep quality and quality of life among CKD-aP patients on hemodialysis has been observed in both the control and intervention groups. Zolpidem and acupressure safety profiling showed no severe adverse effect other that drowsiness, nausea and daytime sleeping already reported in literature of zolpidem.

Patients' perspectives of pain in dialysis: systematic review and thematic synthesis of qualitative studies

ABSTRACT

Pain is a severe and common symptom in patients receiving dialysis but remains inadequately managed in clinical practice. Understanding patient experiences of pain can inform strategies to address this patient-important symptom. We aimed to describe patients' perspectives on causes, experiences, and impacts of dialysis-associated pain. MEDLINE, Embase, PsycINFO, and CINAHL were searched to August 2019 for all qualitative studies that described the perspectives of pain in adults aged 18 years or older receiving dialysis. Findings from the primary studies were analyzed using thematic synthesis. We included 60 studies across 14 countries involving 1343 participants (1215 receiving hemodialysis and 128 receiving peritoneal dialysis), and identified 6 themes: gripped by an all-consuming agony (draining cognitive capacity, exacerbating other symptoms); suffering in silence (surrendering to the inevitable, ignored or dismissed, hiding symptoms to protect others); provoking fear of treatment (resistance to cannulation, avoiding dialysis, anxious from witnessing other patients in pain); preventing life participation (preventing fulfilment of valued roles, depleting the will to live); coping aided by connection with others (shared understanding among patients, comforted and supported by others); and developing awareness, assertiveness, and self-reliance (procedural vigilance, finding strategies to minimize pain, bodily understanding and knowing thresholds, positive thinking). Struggling with pain in dialysis involved a progression of agony, fear, avoidance, and despair. However, support from others and self-management strategies were used to cope with pain. Strategies to empower patients to report and minimize pain and its consequences in dialysis are needed.

Educational or behavioural interventions for symptoms and health-related quality of life in adults receiving haemodialysis: A systematic review

BACKGROUND

People with end-stage kidney disease (ESKD) suffer from multiple symptoms, which have a negative impact on their health-related quality of life (HRQoL). Educational and behavioural interventions are being developed for this population; however, the effect of these interventions is unclear.

AIM

To evaluate the effectiveness of educational or behavioural interventions compared with standard care or alternative strategies on reducing symptoms and improving HRQoL in adults with ESKD receiving haemodialysis (HD).

METHODS

An effectiveness systematic review using Joanna Briggs Institute (JBI) procedures was conducted on experimental studies [randomised controlled trials (RCTs), pseudo-RCTs and quasi-experimental designs] published in English between January 2009 and July 2019. Studies were retrieved from CINAHL, PubMed, MEDLINE, Embase, PsycINFO, Cochrane Library (Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trial) and JBI databases. Effect size at 95% confidence interval was calculated where possible.

RESULTS

Eighteen studies involving 791 participants were included in this review. All studies involved behavioural interventions with the majority of studies (n = 11) targeting psychological symptoms. Interventions were categorised as either active or passive. Active interventions seemed to improve some physical symptoms, although there was very little evidence of improvements to HRQoL. Passive interventions tended to have a large effect on psychological symptoms and the mental health components of HRQoL.

CONCLUSION

Due to great heterogeneity between studies, meta-analyses could not be conducted further limiting the evidence to inform practice. In addition, further research on educational interventions to teach self-management strategies for symptom management and to improve HRQoL in people with ESKD receiving HD are needed.

Intradialytic Nutrition and Hemodialysis Prescriptions: A Personalized Stepwise Approach

Dialysis and nutrition are two sides of the same coin—dialysis depurates metabolic waste that is typically produced by food intake. Hence, dietetic restrictions are commonly imposed in order to limit potassium and phosphate and avoid fluid overload. Conversely, malnutrition is a major challenge and, albeit to differing degrees, all nutritional markers are associated with survival. Dialysis-related malnutrition has a multifactorial origin related to uremic syndrome and comorbidities but also to dialysis treatment. Both an insufficient dialysis dose and excessive removal are contributing factors. It is thus not surprising that dialysis alone, without proper nutritional management, often fails to be effective in combatting malnutrition. While composite indexes can be used to identify patients with poor prognosis, none is fully satisfactory, and the definitions of malnutrition and protein energy wasting are still controversial. Furthermore, most nutritional markers and interventions were assessed in hemodialysis patients, while hemodiafiltration and peritoneal dialysis have been less extensively studied. The significant loss of albumin in these two dialysis modalities makes it extremely difficult to interpret common markers and scores. Despite these problems, hemodialysis sessions represent a valuable opportunity to monitor nutritional status and prescribe nutritional interventions, and several approaches have been tried. In this concept paper, we review the current evidence on intradialytic nutrition and propose an algorithm for adapting nutritional interventions to individual patients.

The Effect of Training Given to Hemodialysis Patients According to the Comfort Theory

PURPOSE

This study was conducted to determine the effect of training that is given in accordance with the Comfort Theory to hemodialysis patients.

METHODS

This study was conducted as a randomized, controlled, and experimental trial between October 10, 2018, and February 27, 2019. The sample of the study consisted of 68 voluntary and literate individuals (34 in the experimental group and 34 in the control group).

RESULTS

When the comfort conditions of patients in the experimental and control groups were compared, it was determined that there was no significant difference in the mean total score on the General Comfort Questionnaire, mean subdimension scores, and mean comfort level scores in the first interview. In the last interview, it was determined that the differences in the mean total score on the General Comfort Questionnaire; the mean scores on the physical, psychospiritual, and sociocultural comfort subdimension; and the mean score of the comfort levels between the experimental and control groups were statistically significant.

CONCLUSION

It was observed that the training that is given in accordance with the Comfort Theory of Kolcaba to the hemodialysis patients increased the mean scores of patients' comfort.

Fostering Innovation in Symptom Management among Hemodialysis Patients: Paths Forward for Insomnia, Muscle Cramps, and Fatigue

Individuals receiving in-center maintenance hemodialysis bear a high burden of both physical and mood symptoms. More than half of patients on hemodialysis report sleep disturbance, muscle cramps, and fatigue. Patients describe symptoms as having a deleterious effect on their quality of life, suggesting that symptom alleviation may meaningfully improve patient-reported outcomes. Moreover, patients on hemodialysis have identified symptom management as a key area for research and innovation, prioritizing symptom alleviation over other health outcomes such as mortality and biochemical indices. Despite the importance of symptoms to patients, there has been little research explicitly geared toward improving patient symptoms, and therefore minimal innovation in symptom management. In general, the physiologic underpinnings of symptoms are poorly understood, hampering the development of targeted therapies. In fact, there have been few drugs or devices approved by the US Food and Drug Administration for the indication of improving any patient-reported outcomes for patients on hemodialysis. Recognizing this gap in innovation, the Kidney Health Initiative, a public-private partnership between the American Society of Nephrology and US Food and Drug Administration, convened a workgroup to first prioritize symptoms for the development of therapeutic interventions, and then identify near-term actionable research goals for the prioritized physical symptoms of insomnia, muscle cramps, and fatigue. This paper summarizes the pathophysiology of the three prioritized symptoms, identifies key knowledge gaps, acknowledges factors that challenge development of new therapies, and offers the nephrology community actionable research goals for insomnia, muscle cramps, and fatigue.

Prevalence of depression and anxiety in end-stage renal disease: A survey of patients undergoing hemodialysis

BACKGROUND

Dialysis is a lifelong treatment required by end stage renal disease patients who are not able to undergo renal transplantation. Dialysis impacts the patients' quality of life drastically, increasing the risk of mortality. Depression and anxiety are commonly reported among dialysis patients, but their prevalence and correlates vary by sociocultural context.

OBJECTIVE

The aim of this study is to examine the prevalence of anxiety and depression and associated factors among patients receiving hemodialysis at a major tertiary referral medical center in Lebanon that receives patients from all over the country.

DESIGN

A cross-sectional, descriptive design was used.

METHODS

Ninety patients receiving hemodialysis were targeted using convenience sampling, with a final sample size of 83 patients. The patients were interviewed while undergoing their dialysis session using the Hospital Anxiety and Depression Scale, and asked demographic and clinical questions.

RESULTS

The majority of participants were married men over 60 years of age; 48% achieved high school education. Depression was prevalent in 40.8% and anxiety in 39.6%, with 20 patients (24.1%) having both conditions. Although 24.1% self-reported anxiety symptoms, only 2.4% were taking anxiolytics. Illiterate patients had significantly higher depression scores than those with higher levels of education (p = 0.021). Patients who were living with their family had higher anxiety scores than those living alone (p = 0.014).

CONCLUSION

Anxiety and depression are underdiagnosed and undertreated in Lebanese dialysis patients. Screening and appropriate referral to mental health specialists are needed.