Related Experiment Video
Updated: Jul 29, 2025

A Retrograde Implantation Approach for Peritoneal Dialysis Catheter Placement in Mice
Published on: July 20, 2022
Prevalence of Asymptomatic COVID-19 Infection in Hemodialysis Patients and the Risk of Hypercoagulability: Should we
Haitham Ezzat1, Nahla Mohamed Teama1, Walid Ahmed Bichari1
1Department of Internal Medicine and Nephrology, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
Insights
Asymptomatic COVID-19 infection is prevalent in hemodialysis patients, with 12.8% testing positive. These patients face increased risks of hypercoagulability and thromboembolic complications, necessitating stricter infection control.
Area of Science:
- Nephrology
- Infectious Diseases
- Hematology
Background:
- Coronavirus disease 2019 (COVID-19) presents varied clinical symptoms.
- End-stage renal disease (ESRD) patients on hemodialysis (HD) require specific infection control.
- Humoral response data in ESRD HD patients with SARS-CoV-2 is limited.
Purpose of the Study:
- To determine the prevalence of asymptomatic SARS-CoV-2 infection in ESRD HD patients.
- To investigate clinical and laboratory differences between infected and non-infected HD patients.
- To assess the risk of hypercoagulability in this population.
Main Methods:
- Screened 179 asymptomatic ESRD HD patients for COVID-19.
- Confirmed SARS-CoV-2 infection using real-time RT-PCR.
- Analyzed demographic and laboratory data, including C-reactive protein, lymphocyte counts, platelet counts, TAT, and D-dimer levels.
Main Results:
- 12.8% (23/179) of asymptomatic HD patients tested positive for SARS-CoV-2.
- Significant differences observed in C-reactive protein, lymphocytes, and platelet counts between positive and negative groups.
- Elevated TAT and D-dimer levels were noted in the COVID-19 positive group, indicating hypercoagulability.
Conclusions:
- Asymptomatic SARS-CoV-2 infection is present in hemodialysis patients.
- HD patients with COVID-19 are at risk for hypercoagulability and thromboembolic complications.
- Enhanced infection control and proactive diagnosis are crucial for managing COVID-19 in HD patients.
Introduction:
Coronavirus disease 2019 (COVID-19) has become a pandemic in late 2019. Its clinical presentation varies from asymptomatic infection to severe respiratory failure. Infection control strategies to minimize the risk of transmission of COVID-19 in end-stage renal disease (ESRD) patients receiving in-center hemodialysis (HD) have been implemented. Development of humoral response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in adult patients with ESRD receiving HD has not been sufficiently reported.
Methods:
A total of 179 asymptomatic HD patients undergoing regular HD were screened for COVID-19 infection. Infection with SARS-CoV-2 was confirmed through a real-time reverse transcription polymerase chain reaction assay of nasopharyngeal swab specimens. They were classified into positive and negative groups according to the results of PCR.
Results:
Of the 179 asymptomatic patients, we found that 23 patients (12.8%) were positive for COVID-19. Their mean age was 45.61 ± 13.38 years. There was a significant difference between both groups regarding C-reactive protein, lymphocytes, and platelet counts (P < 0.001). Also, TAT (thrombin-antithrombin complex) and D-dimer levels were significantly increased among the positive group (11.47 ± 1.51 vs. 7.53 ± 1.64 mcq/L, P < 0.001; 1171.52 ± 267.6 vs. 542.76 ± 107.06 ng/mL, P < 0.001, respectively).
Conclusion:
Asymptomatic SARS-CoV-2 infection is detected in HD patients. They carry the risk of hypercoagulability complications. We need more strict infection control measures and proactive diagnosis to limit the spread of the infection and lethal thromboembolic complications.
Related Concept Videos
Hemodialysis II: Procedure and Complications
Chronic Kidney Disease II: Clinical Manifestations
Hemodialysis I: Introduction
Hemodialysis III: Nursing Management
Nephrotic Syndrome I : Introduction
Acute Kidney Injury IV: Diagnostic Studies and Prevention

