Abstract
Background
Hemodialysis is a life-saving renal replacement treatment for patients with chronic kidney disease, but various complications occur during hemodialysis and associated procedures. This study was conducted to analyze the specific characteristics of hemodialysis-related complications and malpractice that have led to legal disputes.
Methods
Judgments from cases litigated between 1991 and 2019 due to complications related to hemodialysis or vascular access were analyzed using the database of the Korean Supreme Court Judgment System.
Results
Of 32 dialysis-related litigation cases, 14 cases were dismissed and malpractice was recognized in 18 cases. Among all cases and those in which malpractice was recognized, the most common clinical complication was associated with central venous catheter (CVC) insertion (25.0% and 42.9%, respectively). In 22 of 32 (68.8%) cases, complications occurred before or after (not during) dialysis, and performance error was the most common clinical error leading to legal disputes (58.3%). Complications resulted in death in 59.4% of cases, and CVC-related complications were associated with the largest proportion (63.2%) of deaths.
Conclusions
Hemodialysis was implicated in various medical disputes, and CVC-related complications were the most common and serious adverse events. Clinicians’ awareness of the incidence and severity of possible complications of hemodialysis procedures should be increased.
Introduction
Hemodialysis is a life-saving treatment that has been administered to patients with chronic kidney disease for several decades [1]. Although hemodialysis has evolved into a relatively safe procedure, various complications can occur, and some have serious consequences [2–6].
Patients with chronic kidney disease who require hemodialysis are at risk of various complications associated with uremia [7]. Although hemodialysis is believed to improve most uremic symptoms [8, 9], the dialysis procedure may be implicated in the incidence of various complications [4–6]. In particular, many complications are associated with procedures undertaken to prepare for hemodialysis, such as central venous catheter (CVC) placement and surgery performed to obtain vascular access [10–12]. Although the uremic milieu confers vulnerability in many cases in which accidents occur, medical team negligence triggers and exacerbates many hemodialysis -related complications [13, 14] and should be prevented.
This study involved the analysis of judgments in cases litigated in the Korean court system with the goal of proving medical malpractice related to hemodialysis and associated procedures. An analysis of legal judgments of medical malpractice may aid the identification and prevention of rare, but serious, hemodialysis complications generating malpractice claims. It may also help to raise awareness of the possibility of hemodialysis -related malpractice and promote greater attention to the potential occurrence of rare, but important, complications throughout the hemodialysis process.
Materials and methods
We analyzed publicly accessible legal judgments in the database of the judicial system of the Supreme Court of Korea. This database contains judgments from civil proceedings tried from the district court to the Supreme Court level [15, 16]. Identifiable information has been removed from the data. All relevant medical malpractice cases for which sentences were given between January 1, 1991, and December 31, 2019, were retrieved using the search terms “hemodialysis,” “vascular access,” “arteriovenous fistula,” and “arteriovenous graft.” We excluded duplicate cases and those unrelated to hemodialysis. The Institutional Review Board of Korea University Hospital approved this study (no. 2020GR0174) and waived the requirement of informed consent.
Each judgment record contained a detailed narrative of the case, the plaintiff’s malpractice claim, and the court’s decision regarding medical malpractice. Two board-certified nephrologists reviewed these records and collected the following information: year of event, patient age and sex, underlying medical diseases, hemodialysis indication and duration, symptoms before or after hemodialysis /catheter insertion/arteriovenous fistula (AVF) creation, and complication type and severity. Data on the detailed plaintiff claims, court opinions, and final monetary amounts awarded were also collected. The plaintiffs’ allegations in relation to hemodialysis procedures were classified as violations of the duty of care and violations of the duty to explain.
Descriptive statistics were calculated using R software (version 3.5.0; R Foundation for Statistical Computing, Vienna, Austria). Categorical data are described as percentages, and continuous data are described as medians (interquartile ranges [IQRs]).
Results
Of the 490 potentially eligible case records obtained by keyword search, 458 unrelated or duplicate records were excluded and 32 records of cases associated with hemodialysis treatment were retained. Cases associated with vascular access were included in the final analysis (Fig 1). hemodialysis was performed to treat acute kidney injury in six (18.8%) cases and to treat chronic kidney disease in the other cases. In 12 (37.5%) of the 32 cases, complications occurred within 1 year after hemodialysis initiation. Death occurred in 19 (59.4%) cases and permanent disability occurred in nine (28.1%) cases. The demographic and clinical characteristics of the patients involved in the cases are presented in Table 1.
Fig 1. Flowchart of judgement selection based on the inclusion and exclusion criteria.
Table 1. Clinical characteristics of the litigation cases.
Characteristics | N = 32 |
---|---|
Sex | |
Male | 13 (40.6%) |
Female | 8 (25.0%) |
Not described | 11 (34.4%) |
Age, years | |
< 40 | 4 (12.5%) |
≥ 40 | 6 (18.8%) |
Not described | 22 (68.8%) |
Date of complication | |
`90s | 5 (15.6%) |
`00s | 12 (37.5%) |
`10s | 15 (46.9%) |
Dialysis vintage | |
Not described | 7 (21.9%) |
< 1 month | 7 (21.9%) |
≤ 1 year | 5 (15.6%) |
1 < and ≤ 5 year | 7 (21.9%) |
5 < year | 6 (18.8%) |
Characteristics of kidney disease | |
Acute kidney injury | 6 (18.8%) |
Chronic kidney disease | 26 (81.3%) |
Underlying disease | |
Diabetes mellitus | 7 (21.9%) |
Hypertension | 6 (18.8%) |
Hematologic disease | 2 (6.3%) |
Cardiovascular disease | 2 (6.3%) |
Liver disease | 2 (6.3%) |
Neurologic disease | 2 (6.3%) |
Pulmonary disease | 1 (3.1%) |
Infectious disease | 1 (3.1%) |
Not described | 18 (56.3%) |
Grave injury | |
Death | 19 (59.4%) |
Disability | 9 (28.1%) |
Hospitals were the defendants in 24 cases, and doctors and nurses were claimed as the defendants in 10 and 3 cases, respectively. The median claim amount was $72,506 (IQR, $27,144–262,977). Damages were awarded to the plaintiffs in 18 (56.3%) cases, and the median amount was $21,667 (IQR, $9,583–73,807). The overall characteristics of the lawsuits are presented in S1 Table.
The most common clinical causes of litigation were vascular access–related complications. Eighteen (56.3%) cases were associated with the management of vascular access (CVC insertion [n = 8], AV access [n = 7], AV access cannulation [n = 2], and AV access thrombosis [n = 1]). Twenty-four cases involved performance error and five cases involved diagnostic error. Improper complication management was alleged in 12 cases.
Defendant negligence was recognized in 18 (56.3%) of the 32 cases, the majority (n = 11 [61.1%]) of which involved vascular access–associated complications. Six of these cases were associated with CVC insertion, which was the most common cause of malpractice claims, and negligence in instruction and explanation of this procedure was claimed in three of these six cases. The clinical and legal negligence characteristics of the cases are shown in Table 2.
Table 2. Classification of reason for litigation.
Complications related to disputed cases | Allegation of plaintiff | Recognition by Court | ||
---|---|---|---|---|
N = 32 | N = 18 | |||
By clinical characteristics | Vascular access related | CVC insertion | 8 | 6 (75.0%) |
AV access formation | 7 | 4 (57.1%) | ||
AV access cannulation | 2 | 1 (50.0%) | ||
AV access thrombosis | 1 | 0 (0%) | ||
Infection | 4 | 2 (50.0%) | ||
Patient monitoring | 3 | 2 (66.7%) | ||
Dialysis circuit clot | 2 | 0 (0%) | ||
Dialysis delay | 1 | 1 (100%) | ||
Others | 4 | 2 (50.0%) | ||
By negligence categories | Diagnosis error | 5 | 3 (60.0%) | |
Performance error | 24 | 14 (58.3%) | ||
Improper management for complication | 12 | 7 (58.3%) | ||
Lack of informed consent | 2 | 2 (100%) | ||
Improper instruction and/or explanation | 7 | 3 (42.9%) |
Abbreviations: CVC, central venous catheter; AV, arteriovenous
Complications occurred during dialysis in 10 (31.3%) cases, and before (n = 14) or after (n = 8) dialysis in 22 (68.8%) cases. Four complications that occurred during dialysis were attributable to infection (with hepatitis C virus [n = 2], Staphylococcus aureus [n = 1], and an unidentified pathogen [n = 1]). In contrast, most (n = 18 [81.8%]) complications that occurred before or after dialysis were associated with CVC implantation for vascular access. The court recognized negligence in more cases involving complications that occurred before or after dialysis (n = 15 [68.2%]) than in those involving complications that occurred during dialysis (n = 3 [33.3%]). Moreover, negligence was recognized in 11 (66.7%) cases associated with vascular access. The detailed clinical characteristics of the malpractice cases, classified according to complication timing, are presented in Fig 2A.
Fig 2. Characteristics of malpractice recognized by the court.
A. Temporal characteristics according to clinical characteristics of malpractice. B. Grave outcomes according to clinical characteristics of malpractices. The percentages in pie chart represent proportions in whole malpractices and the percentages in donut chart represent sub-proportions in each pie chart.
Of the cases in which deaths occurred, 12 (63.2%) were associated with vascular access management problems, two each involved underlying diseases, unexpected cardiac events, and infection following complications, and one case involved the delay of dialysis treatment. The courts recognized malpractice in seven (58.3%) cases involving deaths related to vascular access problems, but in only two of the cases involving deaths of other causes (Fig 2B). Detailed information on the clinical situations for the malpractice cases is presented in Table 3. Cases that were dismissed are listed in S2 Table.
Table 3. Summary of general information of the lawsuits which recognized negligence.
No. | Age | Sex | Year of event | Type of kidney disease | Complications | Admitted violations of | Grave injury | Claimed amounts, USD | Trial outcome |
---|---|---|---|---|---|---|---|---|---|
duty by judgment | |||||||||
1 | 34 | M | 1991 | CKD | Arterial rupture after dialysis catheter insertion | Malpractice during procedure | Death | 58,333 | Partial recognition |
2 | 50 | M | 1998 | AKI | Pseudoaneurysm after dialysis catheter insertion | Improper instruction and explanation | Nerve injury | 32,026 | Partial recognition |
3 | 46 | F | 1998 | CKD | Delayed dialysis due to delayed insertion of dialysis catheter | Delayed treatment and inappropriate management of complications. | Death | 108,933 | Conciliation |
4 | NI | M | 1999 | CKD | Nerve injury after access formation | Malpractice during surgery | Paralysis of upper arm | 20,122 | Partial recognition |
5 | NI | NI | 2000 | AKI | Infection related to multiple failure of dialysis catheter insertion | Malpractice during procedure and improper management of complication | Death | 16,667 | Conciliation |
6 | NI | M | 2002 | AKI | Respiratory distress due to hematoma after dialysis catheter insertion | Malpractice during procedure and improper management of complication | Death | 115,894 | Settlement decision |
7 | NI | M | 2003 | CKD | HCV infection associated with dialysis machine | Negligence of infection control in dialysis room | HCV infection | 41,578 | Partial recognition |
8 | NI | F | 2005 | CKD | Air embolism after dialysis catheter removal | Insufficient risk notification, prevention efforts, and management of complications | Death | 227,582 | Partial recognition |
9 | 67 | M | 2007 | CKD | HCV infection associated with dialysis machine | Negligence of infection control in dialysis room | HCV infection | 243,642 | Partial recognition |
10 | NI | NI | 2008 | CKD | Bone transformation due to exacerbation of hyperparathyroidism | Negligence in management of complication | Leg deformity | 16,667 | Partial recognition |
11 | 68 | F | 2010 | CKD | Nerve injury during surgery for AVF aneurysm following epidural anesthesia | Delayed diagnosis and treatment of complication | Paraplegia | 360,635 | Partial recognition |
12 | 16 | M | 2011 | CKD | Bleeding at the dialysis catheter insertion site | Insufficient management of complication | Death | 36,324 | Conciliation |
13 | NI | M | 2012 | CKD | Fall down after dialysis | Negligence in duty of care related to patient safety | Death | 29,332 | Partial recognition |
14 | NI | F | 2014 | CKD | Vascular obstruction distal to vascular access | Delayed diagnosis of complication | Amputation of fingers | 27,245 | Partial recognition |
15 | 39 | F | 2014 | CKD | Respiratory distress during access formation on epidural anesthesia | Malpractice during insertion of epidural catheter | Death | 320,983 | Partial recognition |
16 | NI | NI | 2016 | CKD | Delayed dialysis due to refuse of treatment by doctor | Improper instruction and explanation | None | 5,417 | Conciliation |
17 | 32 | M | 2016 | CKD | Burn by infrared warmer during dialysis | Violation in duty of care during dialysis and insufficient management of complication | 3rd degree burn, bone destruction | 348,493 | Partial recognition |
18 | NI | M | 2016 | CKD | Bleeding after removal of dialysis needle from AVF | Delayed detection of complication | Death | 47,270 | Partial recognition |
Abbreviations: AKI = Acute kidney injury; AVF = Arteriovenous fistula; CKD = chronic kidney disease; F = female sex; HCV = hepatitis C virus; M = Male; NI = Not identifiable; USD = United States Dollar; the exchange rate was 1 United States Dollar (USD) = 1200 Korean Won (KRW)
Following three cases were selected as representative cases what the court decided as negligence of the specific duty of care. For each case, we provide a summary, recognized negligence, and the reason for the limitation of liability.
Case 1. A 50-year-old male was diagnosed with acute kidney injury and had to undergo emergency dialysis treatment. Although it was stated at the permission obtained from patient’s family for the procedure as a dialysis catheter would be placed to right femoral vein, but an access through right subclavian vein was attempted. During the catheterization, right subclavian artery was punctured by mistake, but at first it seemed to be controlled by manual compression. After dialysis treatment, the patient complained right shoulder pain and paralysis of the right arm. Later, a pseudoaneurysm of the right subclavian artery was found, which damaged the brachial plexus. Pain and paralysis remained despite a surgical treatment to remove the pseudoaneurysm was done. The plaintiff sued for violating the duty of explanation and care, and the court recognized improper performance in catheterization and the negligence of the duty to explain.
Case 2. A woman of unknown age started hemodialysis treatment for chronic kidney disease. Although it is recommended that the double lumen catheter for hemodialysis should be removed from the supine position, but it was performed in the sitting position. Immediately after the procedure, an air embolism was developed and the patient died. The plaintiff claimed that the procedure was performed without proper notice and treatment. The court admitted that treatment was insufficient and inadequate, and risk notification and prevention efforts were also insufficient.
Case 3. A man of unknown age was diagnosed with acute kidney injury due to contrast induced nephropathy after coronary angiography, and it was decided to initiate hemodialysis treatment. A double lumen catheter was inserted into the left subclavian vein, because an access to the right internal jugular vein was tried, but was not successful. One hour after the procedure, a hematoma was found in the right neck at the catheterization trial site, and the bleeding was not properly controlled even after manual compression. Five hours after the procedure, the patient complained of dyspnea, and respiratory arrest occurred. The patient reached a coma with hypoxic brain damage, and eventually died due to septic shock. The plaintiff claimed errors in catheterization procedure, insufficient treatment for bleeding after the procedure, insufficient prophylactic treatment for dyspnea, inadequate monitoring for dyspnea, and the court admitted everything.
Discussion
The present study reviewed 32 cases of medical malpractice related to hemodialysis procedures and vascular access management that were tried in the Korean court system. Most disputes were associated with events that occurred before or after, rather than during hemodialysis treatment, and associated mainly with vascular access placement and management. In addition, the majority of these complications resulted in serious clinical consequences.
Despite the great value of hemodialysis for controlling of uremia, the characteristics of patients with chronic kidney disease, who have multiple comorbidities and exposed to repeated hemodialysis procedures over long time period, increased the risk of complications even in cases when the procedures are performed by specialized medical staff [17–19]. This study showed that legal disputes related to hemodialysis treatment and vascular access management can be brought against any type of medical institution, regardless of the level of the institution (primary, secondary, or tertiary), or against both nursing and medical staff performing hemodialysis. The heterogeneity of defendants and event locations may reflect the complexity of hemodialysis procedures.
In the current study, the most common cause of disputes was vascular access management–related complications. In a recent study of medical dispute cases tried between 2005 and 2014 in the United States and recorded in the WESTLAW database [13], 66 cases involved complications arising from vascular access establishment or management (e.g., double-lumen CVC insertion or AVF creation/graft placement). Considering the annual incidence of hemodialysis treatment in Korea [20], which is about one-tenth that in the United States, the rate at which such legal disputes have been tried in Korea (12 cases over 19 years) is similar to that in the United States. In addition, the rate of litigations related to complications occurring during CVC insertion (25.0%) was greater than those due to complications related to AV access cannulation (6.3%) and formation (21.9%). Similar results were obtained in a study of malpractice suits brought on behalf of patients undergoing hemodialysis in the United States, in which the rate of CVC-associated cases (36%) was higher than those of cases associated with other types of vascular access (AVF formation, 18%; AV grafting, 12%) [13].
Medical staff caring for patients undergoing hemodialysis should be aware of the high rate of CVC-associated malpractice cases, as CVC insertion remains the most commonly performed procedure upon hemodialysis treatment initiation. According to the annual report of the United States Renal Data System, hemodialysis treatment is initiated by CVC for 80.3% of patients with incident kidney failure [1]. Although ‘fistula first’ strategy was recommended and the long-term CVC use was discouraged by the previous Kidney Disease Outcomes Quality Initiative vascular access guideline [21], the newer guideline recognized that CVCs may be appropriate for certain circumstances, such as in an older hemodialysis patients with limited life expectance or those with poor vascular access sites [22]. With this change in strategy for vascular access considering end-stage kidney disease life-plan and the increase of proportion of elderly dialysis patients, the high prevalence of CVC insertion for initial vascular access has hardly changed for 10 years [23, 24]. Nevertheless, current guidelines for the management of vascular access for dialysis in the United States [21, 22], Australia [25], and Europe [26] do not clearly define or describe all potential risks associated with CVC insertion, such as severe bleeding and air embolism; they describe only the risk of infection. In contrast, they provide detailed recommendations for the avoidance of complications associated with AV access cannulation [22]. According to the results of our study, most of the complications related to CVC was occurred during the insertion process, and it was presumed to be occurred while being performed by a trainee in an emergency situation. This could be a matter of skillfulness in the person inserting catheter, but it also should be emphasized that the procedure may have been performed without awareness of the safety process during catheterization. Based on the cases identified in our study and clinical experience, we suggested a framework that may be helpful to prevent errors during the procedure associated with implementation of dialysis catheter (Fig 3). By recognizing risks in each step of procedure clearly, the occurrences of serious and undesirable medical errors are supposed to be minimized. Ultimately, specific guidelines for CVC-related procedures should be established as well as the awareness for the risk of procedure-related complications in all medical staff should be raised to protect patients from procedure-related errors.
Fig 3. Recommendations for the prevention of malpractices during hemodialysis catheter-related procedures.
This study has several limitations. First, as complete medical records with precise descriptions of clinical situations (e.g., causes of kidney failure, comorbidities, vital signs, and laboratory findings) were not available, the claim-generating events may have had other causes. Second, the final judgment was based primarily on legal considerations, and were not made by medical specialists. Lastly, few medical litigation cases were brought during the 20-year study period. However, as the number of patients receiving dialysis in Korea is increasing rapidly (S3 Table), the number of dialysis-related disputes is expected to increase exponentially in the near future. In this regard, the present findings provide actual examples of the dialysis-related disputes, which may give a caution to medical staffs in dialysis units for avoiding recurrence of malpractices. And our finding demonstrates that medical staffs need to be alert when providing dialysis-related patient care.
In conclusion, hemodialysis -related legal cases tried during the past 19 years were analyzed in the present study. Given the severity of the complications as well as the characteristics of malpractice which could be prevented by increased efforts of medical staffs, it is important to raise the attention in malpractice prevention by medical staffs dedicated to hemodialysis treatment with thorough review of previous cases. Awareness of existing guideline recommendations for these procedures, and close monitoring of patients’ conditions throughout the hemodialysis process, are essential to reduce the risk of malpractice. Better outcomes for patients undergoing hemodialysis, with increased safety and a reduced risk of litigation, can be achieved through the efforts of all medical staff involved in hemodialysis.
Supporting information
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Data Availability
All relevant data are within the manuscript and its Supporting Information files.
Funding Statement
This work was supported by Institute of Korea Health Industry Development Institute (KHIDI) grant funded by the Korea government (Ministry of Health and Welfare, MOHW) (No. HI19C0806, the development of information management system and security tools to avoid the invasion threat of CDM information security based on laws for utilization of distributed research network).
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Supplementary Materials
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Data Availability Statement
All relevant data are within the manuscript and its Supporting Information files.