BACKGROUND: Preoperative elevated serum creatinine values are associated with increased risk for both morbidity and mortality in patients undergoing on-pump coronary artery bypass surgery (CABG). We investigated the postoperative changes of renal function and proper management in the patients. MATERIAL AND METHOD: Among 74 consecutive patients who underwent isolated on-pump CABG, 17 patients with increased serum creatinine level (creatinine > or = 1.5 mg/dL) within preoperative one week were included in the study. Seven patients showed preoperative serum creatinine level of 2.0 mg/dL or higher, and 3 of them had been undergoing hemodialysis. Preoperative hemodialysis was performed in the 3 patients due to end-stage renal failure (ESRD) the day before the operation. We started peritoneal dialysis immediately after the cardiopulmonary bypass in patients with ESRD or postoperative acute renal failure if it was necessary to remove intravascular volume and lower serum creatinine level. RESULT: In most of the patients with CABG, postoperative serum creatinine level increased and recovered to the preoperative level at the discharge. In 2 of the 4 patients with serum creatinine level of 2.0 mg/dL or higher and 3 patients with ESRD, intravascular volume, serum creatinine level and serum electrolyte were controlled with peritoneal dialysis. CONCLUSION: Postoperative serum creatinine level increased transiently in most of CABG patients, and intravascular volume and serum creatinine level were controlled by peritoneal dialysis only in the patients with acute renal failure postoperatively and those depending on hemodialysis.
Acute Kidney Injury ; Cardiopulmonary Bypass ; Coronary Artery Bypass ; Creatinine* ; Humans ; Kidney Failure, Chronic ; Mortality ; Peritoneal Dialysis ; Renal Dialysis ; Renal Insufficiency

Transcatheter aortic valve replacement (TAVR) or transcatheter aortic valve implantation (TAVI) for severe aortic stenosis (AS) is a minimally invasive interventional procedure that repairs a valve without removing the old, damaged valve. Instead, a replacement valve is wedged into the location of the native aortic valve. During TAVR, contrast is used for conventional aortic root angiography, positioning of the TAVR valve device, and assessing the peripheral vasculature. Therefore, contrast-induced acute kidney injury (AKI) is a major concern when performing TAVR and is associated with increased mortality in patients with impaired renal function. Although the exact mechanism of post-TAVR AKI is unknown and appears multifactorial, contrast medium has been reported as a major contributing factor. We report a case of zero-contrast TAVR for severe AS in a patient with chronic kidney disease (CKD). The procedure was successfully performed with only fluoroscopic and transesophageal echocardiography (TEE) guidance.
Acute Kidney Injury ; Angiography ; Aortic Valve ; Aortic Valve Stenosis* ; Echocardiography, Transesophageal ; Humans ; Mortality ; Renal Insufficiency, Chronic* ; Transcatheter Aortic Valve Replacement

BACKGROUND: It was previously known that anuric acute kidney injury (AKI) is uncommon and its occurrence suggests complete ureteral obstruction, shock, or a major vascular event. As the epidemiology of AKI has significantly changed over the past decade, it is possible that the incidence, etiology, or clinical characteristics of anuric AKI have also changed. METHODS: A prospective cohort study was conducted that included all patients undergoing renal replacement therapy (RRT) for AKI during a 2-year period in a tertiary hospital. Patients were classified as having anuric, oliguric, or nonoliguric AKI based on their volume of urine when RRT started using the modified Acute Kidney Injury Network criteria. RESULTS: Of the 203 patients included in the study, 21.2% met the criteria for anuric AKI. Septic and postoperative AKI were the main causes of anuric AKI, with 60.5% of incidences occurring in hospital. Anuric AKI was associated with a younger age, a lower prevalence of pre-morbid chronic kidney disease and diabetes, more frequent continuous RRT requirement, and multi-organ dysfunction. In addition, patients with anuric AKI had a higher rate of in-hospital mortality and long-term dependence on RRT than patients with nonanuric AKI. CONCLUSION: Anuric AKI is common, with sepsis as the main etiological insult, and is associated with adverse outcomes among patients with AKI who require RRT.
Acute Kidney Injury* ; Anuria* ; Cohort Studies ; Epidemiology ; Hospital Mortality ; Humans ; Incidence ; Oliguria ; Prevalence ; Prospective Studies ; Renal Insufficiency, Chronic ; Renal Replacement Therapy ; Sepsis ; Shock ; Tertiary Care Centers ; Ureteral Obstruction

PURPOSE: Acute renal failure is not a rare event in severe burns and the prognosis of a burn patient becomes remarkably unfavorable with the onset of renal insufficiency. Several studies have reported that the incidence of ARF in severe burns is 0.5 ~ 30% and the mortality rate is 73 ~ 90%. This study analyzed the clinical features of severe burns requiring continuous renal replacement therapy (CRRT) to determine the adequate indication for CRRT. METHODS: Thirty-nine patients requiring CRRT out of 492 burned patients who were admitted to the burn intensive care unit in the Burn center, Hangang Sacred Heart Hospital from January 2003 to December 2004, were reviewed. CRRT was indicated when azotemia, fluid overload, acidosis, or hyperkalemia were observed. The APACHE II score, BUN, creatinine, creatine kinase, bicarbonate and base excess were analyzed at admission and at the initiation of CRRT for the survival group and non-survival group. RESULTS: The incidence of ARF requiring CRRT in severely burned patients was 7.9%. The average of burn area was 51.1%. The mean delay in initiating CRRT was 16.6 days and the mean duration of CRRT was 7.0 days. There was no difference between the survival group and the non- survival group in the data obtained upon admission, but there was a significant difference in the BUN level at the initiation CRRT. Therefore, the BUN level at the initiation CRRT has corelation with the mortality. CONCLUSION: CRRT is helpful for treating severely burned patients who have ARF, particularly those with accompanying with hemodynamic instability. This study showed that the BUN level at the initiation of CRRT associated with mortality. Therefore, the BUN level is an important criterion for initiating CRRT in these patients. However, a prospective randomized control study will be needed to accurately define BUN level.
Acidosis ; Acute Kidney Injury ; APACHE ; Azotemia ; Burn Units ; Burns* ; Creatine Kinase ; Creatinine ; Heart ; Hemodynamics ; Humans ; Hyperkalemia ; Incidence ; Intensive Care Units ; Mortality ; Prognosis ; Renal Insufficiency ; Renal Replacement Therapy

PURPOSE: Acute kidney injury (AKI) is a frequent condition with a high mortality rate that requires continuous renal replacement therapy (CRRT). We evaluated the Simplified Acute Physiology Score 3 (SAPS 3) and Acute Physiology and Chronic Health Evaluation II (APACHE II) score, determined at the start of CRRT, for predicting mortality in AKI. METHODS: We retrospectively analyzed the demographic, clinical, and laboratory data of 89 patients with AKI or acute-on-chronic kidney disease who received CRRT between September 2006 and September 2009. We calculated the SAPS 3 and APACHE II score at the start of CRRT. RESULTS: The average age of the 89 patients was 64.4+/-13.9 (17-92) years. Fifty-nine (66.3%) were male. Eighteen (20.2%) patients had chronic kidney disease and 30 (33.7%) had diabetes. The overall mortality was 75.3%. The average SAPS 3 was 89.4+/-14.9 and the average APACHE II score was 28.4+/-5.2. The SAPS 3 was higher in non-survivors than survivors (p=0.038). Infection was more common in non-survivors (p=0.036). There were no significant differences between the two groups for other conditions. The variables influencing mortality on univariate analysis were SAPS 3 and presence of infection. The area under the receiver-operating characteristic curve for SAPS 3 was 0.69 (95% CI. 0.54-0.83). At a SAPS 3 of 84, the sensitivity for predicting mortality was 71.6% and the specificity was 69.2%. CONCLUSION: The SAPS 3 determined before starting CRRT could be a predictor of hospital mortality in patients with AKI.
Acute Kidney Injury ; APACHE ; Hospital Mortality ; Humans ; Kidney Diseases ; Male ; Renal Insufficiency, Chronic ; Renal Replacement Therapy ; Retrospective Studies ; Sensitivity and Specificity ; Survivors

In recent years, the incidence of imported cases infested with Plasmodium falciparum has been increasing in Korea due to marked increase in travel to malarious area without adequate prophylaxis. Cerebral malaria is an encephalopathy, occasionally associated with infestation of P. falciparum, which can complicate some patients infected with Plasmodium falciparum leading to significant mortality. We experienced a case of 45 year-ld male with cerebral malaria, complicated with disseminated intravascular coagulation and acute renal failure. The patient was thought to be infected in travel to Indonesia, Laos, and Bangkok. Blood smear showed typical multiple intra-rythrocytic ring form trophozoites and banana-haped gametocytes of Plasmodium falciparum. The patient died after comatose state with respiration failure for 24 days despite treatment with exchange transfusion, hemodialysis and chemotherapy. We report this case with a review of the literature.
Acute Kidney Injury ; Coma ; Disseminated Intravascular Coagulation ; Drug Therapy ; Humans ; Incidence ; Indonesia ; Korea ; Laos ; Malaria, Cerebral* ; Male ; Mortality ; Plasmodium falciparum* ; Plasmodium* ; Renal Dialysis ; Renal Insufficiency* ; Respiration ; Trophozoites

In recent years, the incidence of imported cases infested with Plasmodium falciparum has been increasing in Korea due to marked increase in travel to malarious area without adequate prophylaxis. Cerebral malaria is an encephalopathy, occasionally associated with infestation of P. falciparum, which can complicate some patients infected with Plasmodium falciparum leading to significant mortality. We experienced a case of 45 year-ld male with cerebral malaria, complicated with disseminated intravascular coagulation and acute renal failure. The patient was thought to be infected in travel to Indonesia, Laos, and Bangkok. Blood smear showed typical multiple intra-rythrocytic ring form trophozoites and banana-haped gametocytes of Plasmodium falciparum. The patient died after comatose state with respiration failure for 24 days despite treatment with exchange transfusion, hemodialysis and chemotherapy. We report this case with a review of the literature.
Acute Kidney Injury ; Coma ; Disseminated Intravascular Coagulation ; Drug Therapy ; Humans ; Incidence ; Indonesia ; Korea ; Laos ; Malaria, Cerebral* ; Male ; Mortality ; Plasmodium falciparum* ; Plasmodium* ; Renal Dialysis ; Renal Insufficiency* ; Respiration ; Trophozoites

Radiocontrast-induced nephropathy (CIN) is the third most common cause of acute renal failure among inpatients. The number of patients undergoing examinations using radiocontrast is increasing, and the population at risk for CIN is growing; this population includes older individuals and those with underlying diabetes mellitus, chronic kidney disease, hypertensive nephropathy, and concomitant use of nephrotoxic drugs. However, little progress in CIN treatment has been made. CIN remains a substantial medical problem because of its association with prolonged hospitalization, the potential need for renal replacement therapy, and increased mortality. The exact pathogenesis of CIN has not been fully elucidated-and multiple factors including tubular renal vasoconstriction, direct renal tubular toxicity, increased oxidative stress, and cellular apoptosis-may contribute to the proximal tubular damage that occurs in patients with CIN. Despite the exploration of numerous prophylactic regimens and treatments, definite therapeutic and preventive strategies for CIN have not been established. This article reviews recent studies involving the risk factors for CIN as well as its pathophysiology and prevention.
Acute Kidney Injury ; Diabetes Mellitus ; Hospitalization ; Humans ; Inpatients ; Mortality ; Oxidative Stress ; Population Characteristics ; Renal Insufficiency, Chronic ; Renal Replacement Therapy ; Risk Factors ; Vasoconstriction

Acute kidney injury (AKI) is characterized by abrupt deterioration of renal function, and its diagnosis relies on creatinine measurements and urine output. AKI is associated with higher morbidity and mortality, and is a risk factor for development of chronic kidney disease. There is no proven medication for AKI. Therefore, prevention and early detection are important. Physicians should be aware of the risk factors for AKI and should monitor renal function in high-risk patients. Management of AKI includes optimization of volume status and renal perfusion, avoidance of nephrotoxic agents, and sufficient nutritional support. Continuous renal replacement therapy is widely available for critically ill children, and this review provides basic information regarding this therapy. Long-term follow-up of patients with AKI for renal function, blood pressure, and proteinuria is recommended.
Acute Kidney Injury* ; Blood Pressure ; Child* ; Creatinine ; Critical Illness ; Diagnosis ; Follow-Up Studies ; Humans ; Mortality ; Nutritional Support ; Perfusion ; Proteinuria ; Renal Insufficiency, Chronic ; Renal Replacement Therapy* ; Risk Factors

PURPOSE: Off-pump coronary artery bypass (OPCAB) is known to be associated with a lower risk of acute renal failure (ARF) than on-pump method. However, little data is available on ARF in OPCAB. The aim of the present study was to identify the incidence, risk factors, and mortality of ARF in OPCAB. METHODS: Perioperative variables in medical records of 573 patients who had undergone OPCAB from Jan 2000 to June 2004 were evaluated. ARF was defined as a 50% increase in preoperative serum creatinine (over 1.4 mg/dL) within 72 hours after operation, or as the need for postoperative dialysis. RESULTS: The incidence of ARF and ARF requiring dialysis were 9.8% and 2.6%, respectively. The independent risk factors for ARF after OPCAB were the perioperative use of an intra-aortic balloon pump (OR, 4.425; 95% CI, 2.342-8.403), high preoperative serum creatinine (OR 2.099; 95% CI, 1.422-3.098), diabetes (OR, 1.961; 95% CI, 1.078-3.571), and old age (OR, 1.479; 95% CI, 1.034- 2.116). The in-hospital mortality rate was 53.3% for patients requiring dialysis, 19.6% for all ARF patients and 0.8% for patients without ARF (p<0.001). The 3-year cumulative mortality rate was 38.4 % in all ARF patients and 5.2% in patients without ARF (p<0.001). CONCLUSION: ARF was not an uncommon complication in adults who underwent OPCAB. Perioperative hemodynamic instability, preoperative renal dysfunction, diabetes, and age could independently predict the development of ARF after OPCAB and the severity of ARF was related to higher in-hospital and long-term mortality rates.
Acute Kidney Injury* ; Adult ; Coronary Artery Bypass ; Coronary Artery Bypass, Off-Pump* ; Creatinine ; Dialysis ; Hemodynamics ; Hospital Mortality ; Humans ; Incidence* ; Medical Records ; Mortality ; Renal Insufficiency ; Risk Factors*