Diagnostic Accuracy of Urine Flow Cytometry in Excluding Bacteruria

NCT ID: NCT04686292

Last Updated: 2022-09-14

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 966 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2021-03-01
• Study Completion Date: 2022-06-01

Brief Summary

A more rapid test for bacteriuria is desired. This will exclude the patients not having bacteriuria, which will contribute to a more rapid and accurate diagnosis of infectious diseases. The aim of the study is to investigate the diagnostic accuracy of point-of-care urine flow cytometry on diagnosing and excluding bacteriuria

Detailed Description

A prerequisite for the appropriate use of antibiotics is timely access to accurate diagnostic tests, since treatment of acute infections should be initiated within a few hours to avoid serious complications such as bacteremia, sepsis, organ failure, septic shock and death.

The diagnosis of urinary tract infections including acute pyelonephritis (APN) is difficult due to often weak and non-specific symptoms and high incidence of asymptomatic bacteruria in especially elderly patients. The diagnosis is verified by significant bacteriuria in urine culture.

Unfortunately, the time from urine sample to result from urine cultures is more than 24 hours days. Urine test strips are unreliable with low specificity and low predictive values. Therefore, a point-of-care (POC) test is desired, which can provide rapid results and quickly identify a bacteriuria. One such tool may be urine flow cytometry (UFC), which has shown promising diagnostic value for the exclusion of bacteriuria with a high negative predictive value. However, better documentation for its use as an ED diagnostic screening method is needed.

The aim of the study is to investigate the diagnostic accuracy of POC-UFC on diagnosing and excluding bacteriuria? Our hypothesis is that by excluding patients not having bacteriuria, it will contribute to a more rapid and accurate diagnosis

Conditions

Acute Infection

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

Suspected infection

All patients admitted to the emergency department with suspected infections assessed by the receiving physician

urine flow cytometry

Intervention Type: DIAGNOSTIC_TEST

Diagnostic test of urine flow cytometry. A urine sample will be collected according to routine procedure by a study assistant. The sample will be divided into two aliquots; half for routine urine culturing, and half for Point-of-care Urine Flow cytometry (POC-UFC) analysis (UF-5000, Sysmex, Kobe, Japan). The analysis will be performed according to manufacturer's instruction and conducted by laboratory staff. Laboratory staff will be blinded to the participants diagnosis and outcome. The results of the POC-UFC analysis will not be visible to the treating physician.

Interventions

urine flow cytometry

Diagnostic test of urine flow cytometry. A urine sample will be collected according to routine procedure by a study assistant. The sample will be divided into two aliquots; half for routine urine culturing, and half for Point-of-care Urine Flow cytometry (POC-UFC) analysis (UF-5000, Sysmex, Kobe, Japan). The analysis will be performed according to manufacturer's instruction and conducted by laboratory staff. Laboratory staff will be blinded to the participants diagnosis and outcome. The results of the POC-UFC analysis will not be visible to the treating physician.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Suspicion of acute infections assessed by the receiving physician at the emergency department

Exclusion Criteria

• If the attending physician considers that participation will delay a life-saving treatment or patient needs direct transfer to the intensive care unit.
• Admission within the last 14 days
• Verified COVID-19 disease within 14 days before admission
• Pregnant women
• Severe immunodeficiencies: Primary immunodeficiencies and secondary immunodeficiencies (HIV positive CD4 <200, Patients receiving immunosuppressive treatment (ATC L04A), Corticosteroid treatment (>20 mg/day prednisone or equivalent for >14 days within the last 30 days), Chemotherapy within 30 days)

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

University of Southern Denmark

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Christian Backer Mogensen

Role: STUDY_CHAIR

Hospital of Southern Jutland

Locations

Hospital of Southern Jutland

Aabenraa, , Denmark

Countries

Denmark

References

Koves B, Cai T, Veeratterapillay R, Pickard R, Seisen T, Lam TB, Yuan CY, Bruyere F, Wagenlehner F, Bartoletti R, Geerlings SE, Pilatz A, Pradere B, Hofmann F, Bonkat G, Wullt B. Benefits and Harms of Treatment of Asymptomatic Bacteriuria: A Systematic Review and Meta-analysis by the European Association of Urology Urological Infection Guidelines Panel. Eur Urol. 2017 Dec;72(6):865-868. doi: 10.1016/j.eururo.2017.07.014. Epub 2017 Jul 25.

Reference Type: BACKGROUND

PMID: 28754533 (View on PubMed)

Herraez O, Asencio MA, Carranza R, Jarabo MM, Huertas M, Redondo O, Arias-Arias A, Jimenez-Alvarez S, Solis S, Zamarron P, Illescas MS, Galan MA. Sysmex UF-1000i flow cytometer to screen urinary tract infections: the URISCAM multicentre study. Lett Appl Microbiol. 2018 Mar;66(3):175-181. doi: 10.1111/lam.12832. Epub 2018 Jan 28.

Reference Type: BACKGROUND

PMID: 29223137 (View on PubMed)

Skjot-Arkil H, Heltborg A, Lorentzen MH, Cartuliares MB, Hertz MA, Graumann O, Rosenvinge FS, Petersen ERB, Ostergaard C, Laursen CB, Skovsted TA, Posth S, Chen M, Mogensen CB. Improved diagnostics of infectious diseases in emergency departments: a protocol of a multifaceted multicentre diagnostic study. BMJ Open. 2021 Sep 30;11(9):e049606. doi: 10.1136/bmjopen-2021-049606.

Reference Type: DERIVED

PMID: 34593497 (View on PubMed)

Other Identifiers

SHS-ED-12b-2020

Identifier Type: -

Identifier Source: org_study_id