Thrombotic microangiopathy with multiorgan involvement following COVID-19.

Acute kidney injury is common among hospitalized COVID-19 patients, with the incidence ranging from 0.5% to 80%, due to diverse pathologies including acute tubular injury, collapsing glomerulopathy, and thrombotic microangiopathy (TMA). While macrovascular thrombosis is common in these individuals, the frequent finding of extensive microvascular thromboses in several series and case reports raises the possibility of thrombotic microangiopathy (TMA) being a contributing factor in the thrombotic and multiorgan complications of the disease. TMA has been described as either the primary finding or in concert with other pathologic findings in COVID-19 patients and carries a poor prognosis, with all patients requiring dialysis. We present a case of TMA with retinal injury and bowel perforation in addition to pulmonary and renal manifestations.

Rhabdomyolysis-Induced Acute Kidney Injury in Diabetic Emergency: Underdiagnosed and an Important Association to Be Aware of.

Rhabdomyolysis is a potentially life-threatening clinical syndrome associated with muscle injury which can cause a leakage of intracellular contents, manifested from the range of being asymptomatic to a life-threatening condition causing acute kidney injury and severe electrolyte abnormalities. Rhabdomyolysis has been associated with both diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic nonketotic syndrome, though there is an increased association with rhabdomyolysis and acute kidney injury with hyperosmolar nonketonic state compared with patients with diabetic ketoacidosis. Common clinical manifestations are muscle pain, dark urine, and generalized weakness. The causes of rhabdomyolysis are broadly categorized into three groups: traumatic, nontraumatic exertional, and nontraumatic nonexertional. Here, we present a case of rhabdomyolysis-induced acute kidney injury in a patient with hyperosmolar hyperglycemic state. The patient was discharged on insulin and needed intermittent dialysis for two months. Our case highlights the importance of the rare association of rhabdomyolysis causing acute kidney injury in a diabetic emergency.

Clostridium difficile Peritonitis: An Emerging Infection in Peritoneal Dialysis Patients.

Recently, the incidence of Clostridium difficile- (C. difficile-) associated infection has increased significantly in hospital and ambulatory care settings in parallel to the increasing use of inappropriate antibiotics. According to the CDC, approximately 83,000 patients who developed C. difficile experienced at least one recurrence and 29,000 died within 30 days of the initial diagnosis. Patients on dialysis (particularly peritoneal dialysis) are predisposed to this infection due to an inherent immunocompromised state and transmural translocation of the bacteria due to the close association of gastrointestinal tract and peritoneal cavity. C. difficile infection in peritoneal dialysis patients is problematic from two aspects: (1) because dialysis patients are immunocompromised, the infection can be devastating and (2) infection directly interferes with their renal replacement therapy. In this article, we present a case of peritoneal dialysis (PD)-related peritonitis caused by C. difficile-associated diarrhea and colitis. In this patient, the peritonitis was caused by transmural translocation of the enteric bacteria. While the peritoneal fluid culture did not grow the organism (possibly because of prior empiric broad-spectrum antibiotics use), the positive PCR on stool analysis suggested C. difficile-related peritonitis, along with the rapid clinical improvement induced by C. difficile-directed therapy (metronidazole) and discontinuation of broad-spectrum antibiotics. The patient was successfully treated with metronidazole without PD catheter removal. C. difficile infection is common and frequently internists are the first contact with such patients. This article highlights C. difficile infection in a PD patient and raises awareness of this infection in dialysis patients.

Prevalence of chronic kidney disease among patients undergoing transradial percutaneous coronary interventions.

BACKGROUND: While transradial approach to conduct percutaneous coronary interventions offers multiple advantages, the procedure can cause radial artery damage and occlusion. Because radial artery is the preferred site for the creation of an arteriovenous fistula to provide dialysis, patients with chronic kidney disease are particularly dependent on radial artery for their long-term survival. METHODS: In this retrospective study, we investigated the prevalence of chronic kidney disease in patients undergoing coronary interventions via radial artery. Stage of chronic kidney disease was based on estimated glomerular filtration rate and National Kidney Foundation - Kidney Disease Outcomes Quality Initiative guidelines. RESULTS: A total of 497 patients undergoing transradial percutaneous coronary interventions were included. Over 70.4% (350/497) of the patients had chronic kidney disease. Stage II chronic kidney disease was observed in 243 (69%) patients (estimated glomerular filtration rate = 76.0 ± 8.4 mL/min). Stage III was observed in 93 (27%) patients (estimated glomerular filtration rate = 49 ± 7.5 mL/min). Stage IV chronic kidney disease was observed in 5 (1%) patients (estimated glomerular filtration rate = 25.6 ± 4.3 mL/min) and Stage V chronic kidney disease was observed in 9 (3%) patients (estimated glomerular filtration rate = 9.3 ± 3.5 mL/min). Overall, 107 of 350 patients (30%) had advanced chronic kidney disease, that is, stage III-V chronic kidney disease. Importantly, 14 of the 107 (13%) patients had either stage IV or V chronic kidney disease. CONCLUSION: This study finds that nearly one-third of the patients undergoing transradial percutaneous coronary interventions have advanced chronic kidney disease. Because many of these patients may require dialysis, the use of radial artery to conduct percutaneous coronary interventions must be carefully considered in chronic kidney disease population.

Management of hypertension in patients during percutaneous dialysis access interventions.

Not infrequently, interventionalists are faced with a patient with increased blood pressure who is about to undergo a dialysis access intervention such as tunneled hemodialysis catheter, percutaneous balloon angioplasty, or declotting procedure for a clotted arteriovenous access. This can frequently create a dilemma as functional dialysis access is needed to provide dialysis therapy and delaying treatment could result in a life-threatening situation, particularly in the presence of hyperkalemia. This article investigates hypertension in patients undergoing percutaneous dialysis access interventions and provides guidance to their management.