Literature DB >> 33510902

Development of acute kidney injury with massive granular casts and microscopic hematuria in patients with COVID-19: two case presentations with literature review.

Takuya Fujimaru1, Keiki Shimada1, Takayuki Hamada1, Kimio Watanabe1, Yugo Ito1, Masahiko Nagahama1, Fumika Taki1, Shutaro Isokawa2, Toru Hifumi2, Norio Otani2, Masaaki Nakayama1.   

Abstract

BACKGROUND: Complications of acute kidney injury (AKI) are common in patients with coronavirus disease in 2019 (COVID-19). However, clinical characteristics of COVID-19-associated AKI are poorly described. We present two cases of severe COVID-19 patients with AKI. CASE
PRESENTATION: A 77-year-old woman was suspected of having vancomycin-associated AKI, and a 45-year-old man was suspected of having heme pigment-induced AKI caused by rhabdomyolysis. The granular cast, which is known to be a valuable diagnostic tool for confirming the diagnosis of acute tubular necrosis, was detected in both patients at the onset of AKI. Interestingly, both patients also developed microscopic hematuria at the occurrence of AKI, and one patient had elevated d-dimer and low platelet levels simultaneously.
CONCLUSIONS: Some reports suggested that COVID-19-associated microangiopathy contributed to the kidney damage. Therefore, it is possible that our patients might have accompanied renal microangiopathy, and that this pathological background may have caused exaggerated tubular damage by vancomycin or heme pigment. The etiology of AKI in patients with COVID-19 is multifactorial. Superimposition of nephrotoxin(s) and virus-associate intra-renal microangiopathy may be a crucial trigger of kidney injury leading to severe AKI in COVID-19 patients. Therefore, in COVID-19 patients, risk factors for AKI should be taken into consideration to prevent its progression into severe AKI.
© The Author(s) 2020.

Entities:  

Keywords:  Acute kidney injury; COVID-19; Microangiopathy; Rhabdomyolysis; Urine sediment examination; Vancomycin-induced acute kidney injury

Year:  2020        PMID: 33510902      PMCID: PMC7716112          DOI: 10.1186/s41100-020-00308-6

Source DB:  PubMed          Journal:  Ren Replace Ther        ISSN: 2059-1381


Background

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was identified to be the cause of a cluster of pneumonia cases in Wuhan, a city in the Hubei Province of China at the end of 2019. It rapidly spread to other provinces in China and around the world. In February 2020, the World Health Organization designated the disease COVID-19, which stands for coronavirus disease in 2019. Besides severe acute respiratory syndrome, complications of acute kidney injury (AKI) are not uncommon in patients with COVID-19. A recent study of 5449 patients who were hospitalized with COVID-19 in New York revealed that 36.6% of patients developed AKI and 14.3% required renal replacement therapy [1], and to note, AKI is significantly associated with in-hospital mortality in COVID-19 patients [1-4]. Therefore, it is of vital importance to prevent AKI development in this population. In regard to the pathological mechanisms of AKI development in COVID-19, it is thought that the virus infection is directly linked with kidney injury. This is because angiotensin-converting enzyme 2, a putative receptor for SARS-CoV-2, is expressed in the kidneys of humans [5]. However, clinical characteristics of COVID-19-associated AKI are poorly described. Herein, two cases are presented of severe COVID-19 patients with AKI. This report suggests the possible role of superimposition of nephrotoxin(s) and virus infection-associated microangiopathy in the kidney for developing severe AKI in COVID-19 patients. This suggests that withholding nephrotoxic agents as much as possible may lessen the risk of AKI occurrence within a clinical setting.

Case presentation

Patient 1 (Table 1)

A 77-year-old woman was referred to our hospital suspected of COVID-19 with a 4-day history of dyspnea. Eight days prior to the admission, she had a fever, cough, and sore throat. Her son was diagnosed with COVID-19 2 days before her admission. She had no history of diabetes, hypertension, and/or chronic kidney disease. On the day of admission, she was alert with a body temperature 37.7 °C, blood pressure at 114/66 mmHg, heart rate at 66 per minute, respiration at 24 per minute, and oxygen saturation at 96% (nasal cannula delivering oxygen 4.0 L per minute). The physical examination was unremarkable. The laboratory test revealed an increase in the C-reactive protein (CRP) level. The patient’s renal and liver functions were normal. Using a dipstick urinalysis, 1+ proteinuria and 1+ hematuria were detected. Chest CT without contrast showed ground-glass opacities in bilateral lower lobes. Ceftriaxone and azithromycin were started. Her respiratory condition gradually deteriorated. The SARS-CoV-2 PCR test performed on the day of admission returned positive 2 days later. On the sixth day of admission, she was intubated and received mechanical ventilation, and piperacillin-tazobactam (4.5 g every 6 h) and methylprednisolone (120 mg/day for 3 days) were started. On day 12, due to the possible superimposed infection with fever and increased white blood cell count, blood cultures were taken and vancomycin was administered (loading dose of 2 g and maintenance dose of 1 g twice a day), but it was discontinued on hospital day 15 with negative blood cultures. On hospital day 16, favipiravir was started because of deterioration confirmed by chest CT scan without contrast. On the same day, serum creatinine had started to elevate (trough vancomycin concentration 26.75 ug/mL), despite adequately maintained blood pressure with no clinical signs of hypotension and volume depletion. Urine microscopy detected massive granular casts and mild hematuria with no dysmorphic red blood cells (RBCs) (30–49 RBCs per high-power field [RBCs/HPF]) and a urine dipstick confirmed that there was no presence of proteinuria. The patient was suspected of vancomycin-associated acute tubular necrosis (ATN). Her respiratory condition remained unchanged; however, her serum creatinine level gradually decreased over the course of several days, with no appearance of granular casts and hematuria thereafter. She underwent tracheostomy on hospital day 26, and mechanical ventilation was withdrawn on hospital day 44. Physiological and laboratory data of patient 1 Cr Creatine, BUN Blood urea nitrogen, RBC Red blood cell, HPF High-power field, VCM Vancomycin, Conc Concentration, PaO Partial pressure of oxygen, FiO Fraction of inspiratory oxygen, WBC White blood cell, CRP C-reactive protein, N/A Not available, NC Nasal cannula, MV Mechanical ventilation, VM Venturi mask aData by dipstick bData by microscopy cData of second day of admission dData of 17th day of admission eData of 34th day of admission

Patient 2 (Table 2)

A 45-year-old man was referred to our hospital with severe respiratory failure and a 10-day history of dyspnea. He had no history of diabetes, hypertension, and/or chronic kidney disease. He was smoking one pack of cigarettes per day. On the day of admission, he was alert with a body temperature of 37.7 °C, blood pressure at 154/110 mmHg, heart rate at 106 per minute, respiration at 36 per minute, and oxygen saturation at 70% with reservoir mask. The laboratory test revealed an increased CRP level. His renal and liver functions were normal. Using a dipstick urinalysis, 1+ proteinuria was detected with no hematuria. Chest CT without contrast showed ground-glass opacities with bilateral peripheral distribution and no pleural effusions. Patient was intubated and received mechanical ventilation, and piperacillin-tazobactam, azithromycin, methylprednisolone, and favipiravir were started empirically due to acute respiratory distress syndrome (ARDS). A SARS-CoV-2 PCR test was performed on hospital day five and returned positive. While the patient’s respiratory condition improved gradually, his high fever still remained with no elevation of white blood cell count or CRP level. On the fifth day of hospitalization, risperidone administration was initiated for delirium. On hospital day eight, a significant increase in serum creatinine kinase accompanying brown colored urine was observed. Using dipstick urinalysis, 2+ proteinuria and 3+ hematuria were detected. In microscopic urinalysis, a few red cells (1–4 RBCs/HPF), myoglobinuria (urine myoglobin concentration was 120,000 ng/mL), and massive granular casts were also detected. Risperidone was discontinued. On hospital day 11, the patient’s serum creatinine was further elevated, although his urine volume was adequately maintained with no significant hypotension and volume depletion. Additionally, he suddenly presented microscopic hematuria with no dysmorphic RBCs (> 50 RBCs/HPF). He was suspected of having heme pigment-associated ATN. His serum creatinine level gradually decreased (peaked at 8.13 mg/dL on hospital day 16), with an eventual disappearance of microscopic hematuria and granular casts. Regarding the pneumonia, the patient discontinued mechanical ventilation on hospital day nine and was discharged on day 33 following two negative PCR tests. After discharge, his renal function recovered to basal level. Physiological and laboratory data of patient 2 Cr Creatine, BUN Blood urea nitrogen, RBC Red blood cell, HPF High-power field, B2MG Beta-2 microglobulin, CK Creatine kinase, PaO Partial pressure of oxygen, FiO Fraction of inspiratory oxygen, BT Body temperature, WBC White blood cell, CRP C-reactive protein, N/A Not available, MV Mechanical ventilation, NC Nasal cannula aData by dipstick bData by microscopy cData of second day of admission dData of 7th day of admission eData of 12th day of admission fData of 13 h day of admission

Discussion and conclusions

In this report, patient 1 was suspected of having vancomycin-associated AKI (VA-AKI) from the clinical course. Patient 2 was suspected of having heme pigment-induced AKI caused by rhabdomyolysis. Interestingly, both patients also developed microscopic hematuria at the occurrence of AKI (Table 3). It is not common to find microscopic hematuria in VA-AKI in addition to rhabdomyolysis. Additionally, patient 2 had elevated d-dimer and low platelet levels simultaneously at the same time as serum creatinine started to elevate (Table 2). Although platelet count and d-dimer level could be associated with severity and prognosis of patients with COVID-19 [6], these findings were observed in a COVID-19 patient with thrombotic microangiopathy that was diagnosed by kidney biopsy [7]. Recent studies have suggested that SARS-CoV-2 causes specific manifestations of proximal tubule dysfunction [8]. However, hematuria might not usually be detected in the patients with proximal tubular injury. Therefore, although our patients did not undergo renal biopsy, they also could have accompanied renal microangiopathy.
Table 3

Summary of two patients

Patient 1Patient 2
Clinical characteristics
 Age, year7745
 SexFemaleMale
 HypertensionNoneNone
 DiabetesNoneNone
 Chronic kidney diseaseNoneNone
 Chronic obstructive pulmonary diseaseNoneNone
 Days from illness onset to admission, day810
Data of AKI
 Days from illness onset to AKI stage 3 onset, day2320
 Urine protein at onset of AKI stage 3+/−3+
 Urine RBC at onset of AKI stage 3, /HPF30–49> 50
 Urine granular cast4+5+
Respiratory status
 Days from illness onset to MV start, day1210
 Duration of MV, day409

AKI Acute kidney injury, RBC Red blood cell, HPF High-power field, RRT Renal replacement therapy, MV Mechanical ventilation

Table 2

Physiological and laboratory data of patient 2

Day of admission, days1581115212940
Day of illness, days1014172024303849
Renal
 Serum Cr, mg/dL0.961.051.824.928.034.351.580.86
 Urine volume, ml/day1110168019651125268028603000N/A
 Serum BUN, mg/dL22.743.975.9119135.865.015.59.8
 Body weight, kg71.771.971.172.8 e71.9N/A66.0N/A
 Urine colorstrawN/Abrownbloodybloodystrawstrawstraw
 Urine protein a2+N/A2+3+2++/−NoneNone
 Urine occult blood aNoneN/A3+3+3+3+NoneNone
 Urine RBC, /HPFN/AN/A1–4> 50> 50> 50NoneNone
 Granular cast bN/AN/A4+5+4+1+NoneNone
 Urine B2MG, ng/mLN/AN/A4580N/A30322 f7374608478
 Serum CK, U/L281N/A129017950855471220360307
 Urine myoglobin, ng/mLN/AN/A1200009500010000 fN/AN/AN/A
Respiratory
 O2 DeviceMVMVMVNCNCNCRARA
 PaO2/FiO2 ratio, mmHg211288315382403425N/AN/A
Immunology
 BT, °C38.041.241.9 d38.238.337.437.3Afebrile
 WBC, /uL8700 c730079001960088001110038002800
 Lymphocyte, /uL1260 c6901910590440100012201850
 CRP, mg/dL15.982.950.680.330.791.550.40.49
 Platelet, × 103/uL1901841007283220242310
d-dimer, ug/mL16.828> 10026.825.3N/AN/AN/A

Cr Creatine, BUN Blood urea nitrogen, RBC Red blood cell, HPF High-power field, B2MG Beta-2 microglobulin, CK Creatine kinase, PaO Partial pressure of oxygen, FiO Fraction of inspiratory oxygen, BT Body temperature, WBC White blood cell, CRP C-reactive protein, N/A Not available, MV Mechanical ventilation, NC Nasal cannula

aData by dipstick

bData by microscopy

cData of second day of admission

dData of 7th day of admission

eData of 12th day of admission

fData of 13 h day of admission

Summary of two patients AKI Acute kidney injury, RBC Red blood cell, HPF High-power field, RRT Renal replacement therapy, MV Mechanical ventilation A report on autopsy findings from deceased patients with COVID-19 has demonstrated the presence of severe injury of the endothelium in the kidney [9], and it is thought that COVID-19-associated microangiopathy may also contribute to the kidney damage [10]. In a few cohort studies of hospitalized COVID-19 patients, 26.7–48% of them had hematuria as detected by a dipstick [2, 4, 11]. Additionally, a study of 5449 patients who were hospitalized with COVID-19 also highlighted that 40.9% of patients had microscopic hematuria (defined as red blood cells > 5) [1]. Furthermore, in some cohort studies of COVID-19, hematuria was one of the independent risk factors for in-hospital death [2], and elevated d-dimer and low platelet levels were correlated with even worse outcomes [12]. Based on these findings, it is speculated that these patients may have microangiopathy and could be vulnerable to developing severe AKI. In the present two patient cases, it is possible that this pathological background may have caused exaggerated tubular damage by vancomycin or heme pigment. It is a known fact that critically ill patients are more susceptible to VA-AKI [13]. According to a study on 12,758 medical records in Hong Kong, 1450 patients were identified as VA-AKI, and logistic regression analysis showed that respiratory failure, piperacillin-tazobactam, and meropenem prescription were the risk factors significantly associated with VA-AKI [14]. In the patients with COVID-19, 3–17% developed ARDS [15, 16], and almost all critically ill patients received antibiotics [17, 18]. Therefore, these patients could have a risk of VA-AKI, which suggests the risk of superimposed nephrotoxicity factors in the development of AKI. Additionally, COVID-19 patients may be susceptible to VA-AKI due to the proximal tubular damage caused by SARS-CoV-2. In patient 2, although the clinical symptoms could be descriptive of neuroleptic malignant syndrome [19], it is still possible that rhabdomyolysis may have been related to SARS-CoV-2 infection. A report of 1099 patients with COVID-19 in China highlighted that two patients had developed rhabdomyolysis [16]. There were five case reports of rhabdomyolysis in COVID-19 patients (Table 4) aged 16–88 years. All patients were male. Among the five patients, three developed AKI [20, 21, 24] and one of three patients received renal replacement therapy [24]. Different pathogeneses of rhabdomyolysis have been suggested; these include direct invasion of the muscle by virus, cytokine storm resulting in muscle damage, and muscle injury by circulating viral toxins [23]. These reports may well suggest the risk of superimposed nephrotoxicity factors in developing AKI as is also the case of antibiotics.
Table 4

Case reports of rhabdomyolysis in COVID-19 patients

Age, yearSexOnset of rhabdomyolysis, days aMaximum value of CK, U/LMaximum value of Cr, mg/dLMinimum value of Cr, mg/dLReference
88Male1135811.381.09[20]
49Male7238001.180.72[21]
60Male1511842NormalNormal[22]
16Male54576560.890.68[23]
37Male2350005.0 (with RRT)2.0[24]
45Male17795088.030.86Patient 2 in this report

CK Creatine kinase, Cr Creatinine, RRT Renal replacement therapy

aAfter onset of COVID-19

Case reports of rhabdomyolysis in COVID-19 patients CK Creatine kinase, Cr Creatinine, RRT Renal replacement therapy aAfter onset of COVID-19 In the present two cases, the granular casts were detected in both patients at the onset of AKI (Table 3). A study of 267 AKI patients showed that the granular cast was a valuable diagnostic tool for confirming the diagnosis of ATN [25]. COVID-19 patients are thought to be susceptible to volume depletion and pre-renal AKI due to high fever and/or gastrointestinal losses. In a study of 333 hospitalized patients with COVID-19, 35 patients developed AKI and two of them were diagnosed with pre-renal AKI [11]. The management of ATN includes maintaining an optimal hemodynamic status to ensure renal perfusion. In COVID-19 patients with ARDS, conservative fluid management is recommended [26]. Therefore, urine sediment examination may be a useful tool to make a precise diagnosis and appropriately manage AKI in COVID-19 patients. The etiology of AKI in patients with COVID-19 is multifactorial. Superimposition of nephrotoxin(s) and virus-associate intra-renal microangiopathy may be a crucial trigger of kidney injury leading to severe AKI in COVID-19 patients. Therefore, in COVID-19 patients, risk factors for AKI should be taken into consideration to prevent its progression into severe AKI.

Literature review

Nine cohort studies were performed to investigate hematuria in COVID-19 patients (Table 5). Four studies were reported from the same hospital, i.e., Tongji Hospital, Wuhan, China [2, 4, 11, 17, 27]. In nine studies, one study analyzed the patients admitted in the intensive care unit (ICU) [27], and the other studies examined all hospitalized patients [1, 2, 4, 11, 17, 28–30]. The median age ranged from 40 to 60 years. Almost half of the patients were male. In three studies involving the hospitalized patients, 10–30% were in the ICU [1, 2, 30]. The mortality rate ranged from 0 to 70%. Older cohorts tended to have higher mortality rates [1, 2, 17].
Table 5

Characteristics of the cohort studies analyzing hematuria in COVID-19 patients

StudyInclusion periodInstitutionsLocationPopulationNo. of patientsMedian age, yearsMale (%)Admitted in ICU (%)Mortality (%)
Xia et al. [27]Feb 5–Mar 20, 2020Tongji HospitalWuhan, ChinaICU8166.654 (66.7)81 (100)60 (74.1)
Hirsch et al. [1]Mar 1–Apr 5, 202013 hospitalsNew York, USAHospitalized5449643317 (60.9)1395 (25.6)888 (16.3) a
Hong et al. [28]Jan 16–Mar 13, 20202 hospitalsSichuan, ChinaHospitalized16846.792 (54.2)N/A3 (1.8)
Na et al. [29]Feb 1–Apr 24, 2020Chungnam National University HospitalDaejeon, KoreaHospitalized6645.635 (53.0)N/A0 (0)
Cheng et al. [2]Jan 28–Feb 11, 2020Tongji HospitalWuhan, ChinaHospitalized70163367 (52.4)73 (10.4)113 (16.1)
Chen et al. [17]Jan 13–Feb 12, 2020Tongji HospitalWuhan, ChinaHospitalized79968171 (62)N/A113 (14.1) b
Taher et al. [30]Apr 1–May 31, 2020Salmaniya Medical ComplexManama, BahrainHospitalized735444 (60.3)23 (31.5)13 (17.8)
Pei et al. [11]Jan 28–Feb 9, 2020Tongji HospitalWuhan, ChinaHospitalized33356.3182 (54.7)N/A29 (8.7)
Li et al. [4]Jan 6–Feb 21, 2020Tongji HospitalWuhan, ChinaHospitalized1935795 (49)N/A32 (17) c

ICU Intensive care unit, N/A Not available

a1281 patients were still admitted at publication

b525 patients were still admitted at publication

c66 patients were still admitted at publication

Characteristics of the cohort studies analyzing hematuria in COVID-19 patients ICU Intensive care unit, N/A Not available a1281 patients were still admitted at publication b525 patients were still admitted at publication c66 patients were still admitted at publication The prevalence of hematuria and proteinuria is shown in Table 6. One study evaluated only AKI patients [1]. In three studies, urinalysis was performed upon admission [4, 11, 27]. In four studies, the timing of the urinalysis was unknown [2, 17, 28, 30]. In all studies, hematuria was observed in approximately 15–50% patients. Six studies detected hematuria using the urine dipstick test [2, 4, 11, 27, 28, 30], and only two studies used urine sediment examination [1, 29]. Approximately 10–60% patients had proteinuria. Eight studies detected proteinuria using the urine dipstick test [1, 2, 4, 11, 27–30]. In these nine studies, four studies examined the rates of hematuria and proteinuria in AKI patients with COVID-19 (Table 7). The incidence of AKI ranged from 10 to 50%, of which 5–9% required dialysis support [1, 27, 30]. Hematuria was detected in 30–60% of the AKI patients. Approximately 20–80% of AKI patients had proteinuria. All studies used the dipstick to detect proteinuria.
Table 6

Hematuria and proteinuria in COVID-19 patients

StudyHematuria (%)Definition of hematuriaProteinuria (%)Definition of proteinuriaTiming of urinalysis
Xia et al. [27]10 (27.8) a> 2+ by dipstick5 (13.9) a> 2+ by dipstickAt hospital presentation
Hirsch et al. [1] b249 (40.9)RBCs >5/HPF272 (42.1) c≥ 2+ by dipstick c24 h before or 48 h after AKI
Hong et al. [28]18 (17.5) d≥ 1+ by dipstick19 (18.4) d≥ 1+ by dipstickN/A
Na et al. [29]10 (15.2)RBCs >3/HPF9 (13.6)Trace or + by dipstickDuring hospitalization
Cheng et al. [2]118 (26.7) e≥ 1+ by dipstick194 (43.9) e≥ 1+ by dipstickN/A
Chen et al. [17]84 (50.6) fN/A100 (60.2) fN/AN/A
Taher et al. [30]15 (20.5)≥ 1+ by dipstick38 (52.1)≥ 1+ by dipstickN/A
Pei et al. [11]139 (41.7)≥ Trace by dipstick219 (65.8)≥ Trace by dipstickOn the first morning after admission
Li et al. [4]71 (48.3) g≥ Trace by dipstick88 (59.9)≥ Trace by dipstickUpon admission

RBCs Red blood cells, HPF High-power field, N/A Not available

aOnly 36 patients were tested

bOnly AKI patients were included

cUp to 646 of 1993 AKI patients were tested

dOnly 103 patients were tested

eOnly 442 patients were tested

fOnly 166 patients were tested

gOnly 147 patients were tested

Table 7

Hematuria and proteinuria in AKI patients with COVID-19

StudyAKI (%)aDialysis support (%)Hematuriab in AKI (%)Proteinuriab in AKI (%)Timing of urinalysis
Xia et al. [27]41 (50.6)8 (9.9)6 (31.6) c3 (15.8) bAt hospital presentation
Hirsch et al. [1]1993 (36.6)285 (5.2)249 (40.9) d272 (42.1) d24 h before or 48 h after AKI
Taher et al. [30]29 (39.7)7 (9.6)11 (37.9)24 (82.8)N/A
Pei et al. [11]35 (10.5)N/A21 (60.0)31 (88.6)On the first morning after admission

AKI Acute kidney injury, RBCs Red blood cells, HPF High-power field, N/A Not available, KDIGO Kidney Disease: Improving Global Outcomes

aAKI definition was based on KDIGO criteria [31]

bDefinition is shown in Table 6

cOnly 19 AKI patients were tested

dUp to 646 of 1993 AKI patients were tested

Hematuria and proteinuria in COVID-19 patients RBCs Red blood cells, HPF High-power field, N/A Not available aOnly 36 patients were tested bOnly AKI patients were included cUp to 646 of 1993 AKI patients were tested dOnly 103 patients were tested eOnly 442 patients were tested fOnly 166 patients were tested gOnly 147 patients were tested Hematuria and proteinuria in AKI patients with COVID-19 AKI Acute kidney injury, RBCs Red blood cells, HPF High-power field, N/A Not available, KDIGO Kidney Disease: Improving Global Outcomes aAKI definition was based on KDIGO criteria [31] bDefinition is shown in Table 6 cOnly 19 AKI patients were tested dUp to 646 of 1993 AKI patients were tested The pathophysiology of hematuria and proteinuria in COVID-19 patients remains unclear. Sharma et al. evaluated biopsied kidneys from ten COVID-19 patients with AKI [32]. In their study, all patients had proteinuria and were diagnosed with acute tubular necrosis through kidney biopsy. Interestingly, one patient with massive hematuria (> 50 RBCs/HPF) was also diagnosed with thrombotic microangiopathy. Furthermore, in another study that evaluated biopsy samples of native kidneys from 14 patients with COVID-19, five patients were diagnosed with collapsing glomerulopathy [33]. These studies suggested that COVID-19 affected the kidneys in the tubular, vascular, and glomerular compartments [32].
Table 1

Physiological and laboratory data of patient 1

Day of admission, days15812161922263444
Day of illness, days8121519232629334151
Renal
 Cr, mg/dL0.590.410.620.432.223.301.620.990.560.39
 Urine volume, ml/dayN/A89017751815132021602515232512301020
 Serum BUN, mg/dL17.116.944.634.669.2125.379.255.549.637.2
 Body weight, kg55.0 c54.957.658.556.156.454.155.452.0 e48.4
 Urine protein a1+N/A1+1++/− d+/−None+/−1++/−
 Urine occult blood a1+N/ANone+/−+/−None+/−None+/−None
 Urine RBC, /HPFN/AN/A< 15–930–49 d< 11–41–4N/ANone
 Granular cast bN/AN/ANoneNone4+dNoneNone1+N/ANone
Respiratory
 O2 DeviceNCMVMVMVMVMVMVMVMVVM
 PaO2/FiO2 ratio, mmHgN/A123206144148136137137233266
Immunology
 WBC, /uL6800 c132001340015800141001540010200140001360014000
 Lymphocyte, /uL1200 c7903405502805407104904101190
 CRP, mg/dL10.4520.378.021.5316.175.922.0216.321.514.29
 Platelet, × 103/uL133188175158183237195251189262
 D-dimer, ug/mL1.06.3> 10028.5249.812.210.411.93.5

Cr Creatine, BUN Blood urea nitrogen, RBC Red blood cell, HPF High-power field, VCM Vancomycin, Conc Concentration, PaO Partial pressure of oxygen, FiO Fraction of inspiratory oxygen, WBC White blood cell, CRP C-reactive protein, N/A Not available, NC Nasal cannula, MV Mechanical ventilation, VM Venturi mask

aData by dipstick

bData by microscopy

cData of second day of admission

dData of 17th day of admission

eData of 34th day of admission

  30 in total

1.  COVID-19-Associated Kidney Injury: A Case Series of Kidney Biopsy Findings.

Authors:  Purva Sharma; Nupur N Uppal; Rimda Wanchoo; Hitesh H Shah; Yihe Yang; Rushang Parikh; Yuriy Khanin; Varun Madireddy; Christopher P Larsen; Kenar D Jhaveri; Vanesa Bijol
Journal:  J Am Soc Nephrol       Date:  2020-07-13       Impact factor: 10.121

2.  Kidney manifestations of mild, moderate and severe coronavirus disease 2019: a retrospective cohort study.

Authors:  Daqing Hong; Lin Long; Amanda Y Wang; Yu Lei; Yun Tang; Jia Wei Zhao; Xiaofei Song; Yanan He; Ergang Wen; Ling Zheng; Guisen Li; Li Wang
Journal:  Clin Kidney J       Date:  2020-05-09

3.  Renal histopathological analysis of 26 postmortem findings of patients with COVID-19 in China.

Authors:  Hua Su; Ming Yang; Cheng Wan; Li-Xia Yi; Fang Tang; Hong-Yan Zhu; Fan Yi; Hai-Chun Yang; Agnes B Fogo; Xiu Nie; Chun Zhang
Journal:  Kidney Int       Date:  2020-04-09       Impact factor: 10.612

4.  Vancomycin-associated acute kidney injury in Hong Kong in 2012-2016.

Authors:  Xuzhen Qin; Man-Fung Tsoi; Xinyu Zhao; Lin Zhang; Zhihong Qi; Bernard M Y Cheung
Journal:  BMC Nephrol       Date:  2020-02-03       Impact factor: 2.388

5.  Clinical Characteristics of Coronavirus Disease 2019 in China.

Authors:  Wei-Jie Guan; Zheng-Yi Ni; Yu Hu; Wen-Hua Liang; Chun-Quan Ou; Jian-Xing He; Lei Liu; Hong Shan; Chun-Liang Lei; David S C Hui; Bin Du; Lan-Juan Li; Guang Zeng; Kwok-Yung Yuen; Ru-Chong Chen; Chun-Li Tang; Tao Wang; Ping-Yan Chen; Jie Xiang; Shi-Yue Li; Jin-Lin Wang; Zi-Jing Liang; Yi-Xiang Peng; Li Wei; Yong Liu; Ya-Hua Hu; Peng Peng; Jian-Ming Wang; Ji-Yang Liu; Zhong Chen; Gang Li; Zhi-Jian Zheng; Shao-Qin Qiu; Jie Luo; Chang-Jiang Ye; Shao-Yong Zhu; Nan-Shan Zhong
Journal:  N Engl J Med       Date:  2020-02-28       Impact factor: 91.245

6.  Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Associated with Rhabdomyolysis and Acute Kidney Injury (AKI).

Authors:  Woon H Chong; Biplab Saha
Journal:  Am J Med Sci       Date:  2020-07-28       Impact factor: 2.378

7.  Acute kidney injury in patients hospitalized with COVID-19.

Authors:  Jamie S Hirsch; Jia H Ng; Daniel W Ross; Purva Sharma; Hitesh H Shah; Richard L Barnett; Azzour D Hazzan; Steven Fishbane; Kenar D Jhaveri
Journal:  Kidney Int       Date:  2020-05-16       Impact factor: 10.612

8.  Kidney disease is associated with in-hospital death of patients with COVID-19.

Authors:  Yichun Cheng; Ran Luo; Kun Wang; Meng Zhang; Zhixiang Wang; Lei Dong; Junhua Li; Ying Yao; Shuwang Ge; Gang Xu
Journal:  Kidney Int       Date:  2020-03-20       Impact factor: 10.612

9.  Treatment for severe acute respiratory distress syndrome from COVID-19.

Authors:  Michael A Matthay; J Matthew Aldrich; Jeffrey E Gotts
Journal:  Lancet Respir Med       Date:  2020-03-20       Impact factor: 30.700

10.  Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study.

Authors:  Fei Zhou; Ting Yu; Ronghui Du; Guohui Fan; Ying Liu; Zhibo Liu; Jie Xiang; Yeming Wang; Bin Song; Xiaoying Gu; Lulu Guan; Yuan Wei; Hui Li; Xudong Wu; Jiuyang Xu; Shengjin Tu; Yi Zhang; Hua Chen; Bin Cao
Journal:  Lancet       Date:  2020-03-11       Impact factor: 79.321

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  2 in total

1.  Urine sediment findings were milder in patients with COVID-19-associated renal injuries than in those with non-COVID-19-associated renal injuries.

Authors:  Yoshifumi Morita; Makoto Kurano; Daisuke Jubishi; Mahoko Ikeda; Koh Okamoto; Masami Tanaka; Sohei Harada; Shu Okugawa; Kyoji Moriya; Yutaka Yatomi
Journal:  Int J Infect Dis       Date:  2022-02-17       Impact factor: 12.074

2.  Manifestations of renal system involvement in hospitalized patients with COVID-19 in Saudi Arabia.

Authors:  Khaled S Allemailem; Ahmad Almatroudi; Amjad Ali Khan; Arshad H Rahmani; Ibrahim S Almarshad; Fahad S Alekezem; Nagwa Hassanein; Asmaa M El-Kady
Journal:  PLoS One       Date:  2021-07-15       Impact factor: 3.240

  2 in total

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