Clinical trial NCT01989091: Efficacy Study to Evaluate B-Lock™ as an Antimicrobial Lock Solution in Dialysis Patients With a CVC
Official title: Multi-Center, Prospective, Randomized, Open-Label, Sponsor-Blinded, Active-Control (Heparin) Clinical Investigation to Evaluate the Safety and Effectiveness of B-Lock™ as an Antimicrobial Catheter Lock Solution in Dialysis Patients With a Central Venous Catheter
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE3
Conditions: Dialysis Catheter Infections
Keywords: kidney dialysis
hemodialysis
locking solution
antimicrobial
thrombolytic
Lead sponsor: Great Lakes Pharmaceuticals Inc.
Sponsor class: INDUSTRY
First posted: 2013-11-20
Enrollment: 270
Sex: ALL
Minimum age (years): 18
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: Hypothesis: B-Lock is a safe and effective catheter lock solution that will maintain catheter patency and reduce Central Line Associated Blood Stream Infections (CLABSI) in dialysis patients using a central venous catheter (CVC) for vascular access.

The study is a prospective, randomized, site unblinded/sponsor blinded, clinical study of a minimum of 300 dialysis patients using a central venous catheter (CVC) for vascular access. Patients will be randomized 1:1 to receive either the investigational medical device (B-Lock or IMD) or active control heparin (5000 U/mL) (ACH) and observed for a minimum of 45 days or a maximum of 273 (expected average 160 days). IMD or ACH will be instilled into the catheter lumens (dual lumen catheters) at the end of each dialysis session and removed prior to the initiation of the next dialysis session.

The primary objectives of this study are:

* To demonstrate the safety of B-Lock in dialysis patients
* To demonstrate the non-inferiority or, if proven to be non-inferior, superiority of B-Lock relative to ACH with respect to maintaining catheter patency as defined by the use of recombinant tissue plasminogen activator for maintaining adequate blood flow through the dialysis catheter
* To demonstrate the superiority of B-Lock relative to ACH with respect to the incidence of CLABSI


Eligibility criteria: Inclusion Criteria:

* Male or female patients age 18 to 80 years, inclusive. Patients, age 81 to 85 years, inclusive, may be included on a case-by-case basis if their health status is determined to be stable after consultation with the Medical Monitor.
* Patients with end-stage renal disease receiving hemodialysis via CVC.
* Patients must be expected to receive hemodialysis through a direct or cuffed, tunneled dual lumen catheter or 2 cuffed, tunneled single lumen catheters for a minimum of 45 catheter-days after Day 1.
* Patients must have been receiving dialysis for a minimum of 6 dialysis sessions at the study center dialysis clinic prior to the signing of the Informed Consent Form (ICF).
* Patients must have received dialysis at their prescribed blood flow rate (+/- 10%) for at least 2 consecutive dialysis sessions prior to signing the ICF.
* Patients must have 2 screening pre-pump arterial pressure measurements (collected during the first 20 minutes of dialysis) that differ by less than or equal to (≤) 20 mmHg at 2 consecutive dialysis sessions when receiving dialysis at their prescribed blood flow rate (+/- 10%) prior to randomization.

Exclusion Criteria:

* Clinical signs and/or symptoms of a local or systemic infection within 14 days prior to Day 1.
* Evidence of infection of the catheter exit site/tunnel within 14 days prior to Day 1.
* Patients who have received systemic antibiotics within 14 days prior to Day 1.
* History of fever (T \> 37.5°C) or chills within 14 days prior to Day 1.
* An occluded catheter (blood flow inadequate for dialysis) or a catheter that required thrombolytic treatment within 14 days prior to Day 1.
* A catheter coated or impregnated with an antithrombotic, antimicrobial or antiseptic agent, including heparin.
* A catheter coated or impregnated with an antithrombotic, antimicrobial or antiseptic agent, including heparin.
* Catheters that are deemed by their manufacturers to be incompatible with alcohol-containing solutions. These include, but are not limited to:

  1. Angiodynamics - LifeJet® VP VascPak Catheter.
  2. Angiodynamics - Schon™ Chronic Hemodialysis Catheter.
  3. Angiotech - Hemostream™ Chronic Dialysis Catheter.
  4. Bard - all Bard Catheters.
* The use of TEGO® or TEGO-like catheter caps. Patients may be switched to standard catheter caps in order to participate in this study.
* Patients with a known or documented allergy to TMP or TMP-containing drugs, ethanol, ethylene diamine tetraacetic acid (EDTA), propylene glycol and/or glycerin.
* Patients with a history of heparin-induced thrombocytopenia or in whom the use of heparin is contraindicated. (Note: If the use of heparin is restricted for only a specified period of time, the patient may be enrolled at a later date when the use of heparin is no longer contraindicated.)
* Evidence of acute/ongoing hepatic injury (alanine aminotransferase \[ALT\] \> 300 IU/L) or chronic hepatic insufficiency (Total bilirubin \> 2.0 mg/dL and/or albumin \< 3.0 g/dL during Screening or within 30 days prior to Screening). Note: A patient whose albumin level is low solely due to nephrotic syndrome may be enrolled (with Medical Monitor approval) if the albumin level has been stable for at least 3 months prior to ICF signature.
* Patients who the Investigator believes have a prognosis for survival of less than 3 months.

Primary outcomes:
measure: The number of adverse events (AEs), serious adverse events (SAEs) and device deficiencies (DDs) in the experimental and control populations
timeFrame: 39 weeks
measure: The number of thrombolytic treatment events in the experimental and control populations.
timeFrame: 39 weeks
measure: The number of Central Line Associated Blood Stream Infections (CLABSI events) in the experimental and control populations.
timeFrame: 39 weeks
Secondary outcomes:
measure: The number of Lock Solution Failures in the experimental and control populations.
timeFrame: 39 weeks
measure: The number of Occlusive Malfunction events in the experimental and control populations.
timeFrame: 39 weeks
measure: The number of lock solution aspirate cultures that are positive for bacterial or fungal growth in the experimental and control populations.
timeFrame: 39 weeks
measure: The number of catheters removed from the experimental and control patients that are found to have bacterial or fungal biofilm present inside the catheter lumen(s).
timeFrame: 39 weeks
measure: Catheter blood flow rates measured under standardized conditions over the duration of the study in the experimental and control populations.
timeFrame: 39 weeks
Other outcomes:
Locations:
city: Budapest
country: Hungary
facility: FMC Dialízis Központ Péterfy S. Kórház
city: Budapest
country: Hungary
facility: FMC Dialízis Központ Szent István Kórház
city: Budapest
country: Hungary
facility: FMC Szépvölgyi Dialízis Központ
city: Debrecen
country: Hungary
facility: DE OEC Nephrologiai Tanszék
city: Eger
country: Hungary
facility: FMC Dialízis Központ Eger
city: Kecskémet
country: Hungary
facility: FMC Dialízis Központ Kecskemét
city: Miskolc
country: Hungary
facility: FMC Nefrológiai Központ Miskolc
city: Pécs
country: Hungary
facility: FMC Dialízis Központ Pécs
city: Pécs
country: Hungary
facility: FMC Szatellita Dialízis Központ Pécs
city: Szeged
country: Hungary
facility: Szegedi Tudományegyetem
city: Elbląg
country: Poland
facility: Stacja Dializ w NZOZ Centrum Chorób Wewnętrzynych "EL-VITA" w Elblągu
city: Gdansk
country: Poland
facility: Stacja Dializ NZOZ Diaverum
city: Gdansk
country: Poland
facility: Uniwersyteckie Centrum Kliniczne, Klinika Nefrologii, Transplantologii i Chorób Wewn
city: Gdańsk
country: Poland
facility: Niepubliczny Zakład Opieki Zdrowotnej Diaverum Gdańsk Kartuska, Stacja Dializ
city: Legnica
country: Poland
facility: Stacja Dializ NZOZ Avitum w Legnicy
city: Miechów
country: Poland
facility: Stacja Dializ NZOZ Avitum w Miechowie
city: Poznań
country: Poland
facility: Szpital Kliniczny im. H. Święcickiego, Oddział Nefrologii, Pododdział Dializ
city: Radom
country: Poland
facility: Radomski Szpital Specjalistyczny im. T. Chałubińskiego, Oddział Dializ
city: Tczew
country: Poland
facility: Stacja Dializ NZOZ Diaverum w Tczewie
city: Zgierz
country: Poland
facility: Stacja Dializ NZOZ Avitum w Zgierzu
city: Łódź
country: Poland
facility: Uniw. Szpital Kliniczny im. N.Barlickiego,Oddział Nefrologii, Pododdział Dializ
Study officials:
affiliation: Great Lakes Pharmaceuticals Inc.
name: John C Cheronis, MD PhD
role: STUDY_DIRECTOR
References:
citation: Rijnders B, DiSciullo GJ, Csiky B, Rutkowski B, Appelt K, Cheronis J, Aitchison R, Gordon G, Jadoul M, Fluck R. Locking Hemodialysis Catheters With Trimethoprim-Ethanol-Ca-EDTA to Prevent Bloodstream Infections: A Randomized, Evaluator-blinded Clinical Trial. Clin Infect Dis. 2019 Jun 18;69(1):130-136. doi: 10.1093/cid/ciy840.