Short-course Antibiotics vs Standard Course Antibiotics in Patients With Cholangitis
COBRA
Very Short-course Versus Standard Course Antibiotic Therapy in Patients With Acute ChOlangitis After Adequate Endoscopic BiliaRy drAinage
3 other identifiers
interventional
440
1 country
31
Brief Summary
The goal of this multicentre randomized controlled trial is to investigate if a very short-course of antibiotics (1 day) for cholangitis after adequate drainage is non-inferior with respect to clinical cure in comparison with a standard course of antibiotics (4 to 7 days). Secondary objectives include:
- Will a one-day course of antibiotics for cholangitis after adequate drainage be non-inferior with respect to relapse of cholangitis and mortality in comparison with a standard course of antibiotics?
- Will a one-day course of antibiotics for cholangitis after adequate drainage result in less adverse drug events in comparison with a standard course of antibiotics?
- Will a one-day course of antibiotics for cholangitis after adequate drainage reduce length of hospital stay?
- Will a one-day course of antibiotics for cholangitis after adequate drainage improve quality of life?
- Will a one-day course of antibiotics for cholangitis after adequate drainage be cost-effective?
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for not_applicable
Started Jul 2023
Typical duration for not_applicable
31 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
February 3, 2023
CompletedFirst Posted
Study publicly available on registry
March 2, 2023
CompletedStudy Start
First participant enrolled
July 19, 2023
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 1, 2026
CompletedStudy Completion
Last participant's last visit for all outcomes
September 1, 2026
ExpectedFebruary 5, 2026
February 1, 2026
2.6 years
February 3, 2023
February 3, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
clinical cure rate by day 14 after ERCP without relapse by day 30
Clinical cure is defined as the absence of both fever (\>38°C) and/or shaking chills, and initial presenting symptoms. Relapse is defined as the initiation of new antibiotic therapy for recurrent cholangitis, subsequent infection in the hepatic-pancreatic-biliary region, or any other subsequent infection possibly related to the initial episode of cholangitis.
30 days
Secondary Outcomes (8)
All-cause 90-day mortality.
90 days
Relapse of cholangitis within 90 days
90 days
Rate of any other subsequent infection requiring antibiotic therapy within 90 days.
90 days
Rate of subsequent infections with MDR bacteria or Clostridioides difficile within 90 days.
90 days
Rate of other adverse drug events within 14 days
14 days
- +3 more secondary outcomes
Study Arms (2)
Very short-course antibiotics
EXPERIMENTALThe antibiotic regimens will be according to the local hospital's antibiotic guideline for cholangitis (e.g. dosage form, dosage, frequency)and/or the national SWAB guideline in the Netherlands. In the experimental group, duration of ABT after adequate drainage will be 1 day. The duration will be 4 days and can be extended to 7 days in case of gram-negative bacteraemia, according to the national SWAB guideline regarding gram-negative sepsis.
Standard course antibiotics
ACTIVE COMPARATORThe antibiotic regimens will be according to the local hospital's antibiotic guideline for cholangitis, which are based on the previously mentioned national SWAB guideline. This means that the type of ABT, dosage and frequency will be comparable to the experimental group. In the comparator group treatment duration with ABT after ERCP will be according to the international well known and widely used TG18. The duration will be 4 days and can be extended to 7 days in case of gram-negative bacteraemia, according to the national SWAB guideline regarding gram-negative sepsis.
Interventions
The duration of antibiotics is 24 hours after adequate biliary drainage. The choice of antibiotics will be according to local protocol and/or national Dutch SWAB guidelines. The most common antibiotics are described above, but this can differ based on allergies, local protocol or previous cultures. Drug classes may include: aminoglycosides, carbapenems, cefalosporins, fluorquinolones, sulfonamides, penicillines.
The duration of antibiotics is 4 to 7 days after adequate biliary drainage. The choice of antibiotics will be according to local protocol and/or national Dutch SWAB guidelines. The most common antibiotics are described above, but this can differ based on allergies, local protocol or previous cultures. Drug classes may include: aminoglycosides, carbapenems, cefalosporins, fluorquinolones, sulfonamides, penicillines.
Eligibility Criteria
You may qualify if:
- Patients with acute cholangitis due to common bile duct stones, benign or malignant distal biliary obstruction or distal biliary stent dysfunction (only stents in situ for a minimum of 30 days)
- ERCP with adequate biliary drainage (all common bile duct stones are removed and/or there is adequate flow of clear bile with or without a biliary stent(s))
- Absence of fever (temperature \<38.5°C) or a decrease of body temperature of at least 1°C has occurred within 24 hours after ERCP
- Age ≥ 18 years
- Written informed consent (IC)
You may not qualify if:
- Other aetiologies of acute cholangitis (e.g. primary sclerosing cholangitis, (sub)hilar and/or intrahepatic strictures or hilar stents)
- A recurrent cholangitis (within 3 months)
- Patients with surgically altered anatomy (leading to biliary-enteric anastomosis)
- Concomitant pancreatitis, according to International Association of Pancreatology/American Pancreatic Association guidelines.\[18\] Acute pancreatitis is diagnosed in case of fulfilment of 2 out of 3 of the following criteria:
- Upper abdominal pain
- Serum amylase or lipase \>3x ULN
- Signs of acute pancreatitis on imaging
- Concomitant cholecystitis, according to TG18 criteria.\[19\] Acute cholecystitis is suspected in case one item in A is met and one item in B and C.
- A. Local signs of inflammation
- A1: Murphy's sign
- A2: Right upper quadrant mass/pain/tenderness B. Systemic signs of inflammation
- B1: Fever
- B2: Elevated C-reactive protein
- B3: Elevated WBC count C. Imaging findings characteristic of acute cholecystitis
- Concomitant liver abscess
- +5 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (31)
Flevoziekenhuis
Almere Stad, Flevoland, 1315 RA, Netherlands
Rijnstate Ziekenhuis
Arnhem, Gelderland, 6815 AD, Netherlands
Radboud umc
Nijmegen, Gelderland, 6525 GA, Netherlands
Canisius Wilhelmina Ziekenhuis
Nijmegen, Gelderland, 6532 SZ, Netherlands
Maastricht UMC+
Maastricht, Limburg, 6229 HX, Netherlands
Jeroen Bosch Ziekenhuis
's-Hertogenbosch, North Brabant, 5223 GZ, Netherlands
Catharina Ziekenhuis
Eindhoven, North Brabant, 5623 EJ, Netherlands
Elisabeth Tweesteden Ziekenhuis
Tilburg, North Brabant, 5022 GC, Netherlands
Amstelland Ziekenhuis
Amstelveen, North Holland, 1186 AM, Netherlands
Amsterdam UMC
Amsterdam, North Holland, 1081 HZ, Netherlands
OLVG
Amsterdam, North Holland, 1091 AC, Netherlands
Spaarne Gasthuis
Hoofddorp, North Holland, 2134 TM, Netherlands
Dijklander Ziekenhuis
Hoorn, North Holland, 1624 AR, Netherlands
Zaans Medisch Centrum
Zaandam, North Holland, 1502 DV, Netherlands
Deventer Ziekenhuis
Deventer, Overijssel, 7416 SE, Netherlands
Medisch Spectrum Twente
Enschede, Overijssel, 7512 KZ, Netherlands
Isala
Zwolle, Overijssel, 8025 AB, Netherlands
Medisch Centrum Leeuwarden
Leeuwarden, Provincie Friesland, 8934 AD, Netherlands
Reinier de Graaf Gasthuis
Delft, South Holland, 2625 AD, Netherlands
Albert Schweitzer Ziekenhuis
Dordrecht, South Holland, 3318 AT, Netherlands
Groene Hart Ziekenhuis
Gouda, South Holland, 2803 HH, Netherlands
Leids Universitair Medisch Centrum
Leiden, South Holland, 2333 ZA, Netherlands
Alrijne Ziekenhuis
Leiderdorp, South Holland, 2353 GA, Netherlands
Erasmus MC
Rotterdam, South Holland, 3015 GD, Netherlands
Maasstad Ziekenhuis
Rotterdam, South Holland, 3079 DZ, Netherlands
Haaglanden Medisch Centrum
The Hague, South Holland, 2512 VA, Netherlands
Meander MC
Amersfoort, Utrecht, 3813 TZ, Netherlands
St. Antonius Ziekenhuis
Nieuwegein, Utrecht, 3435 CM, Netherlands
Universitair Medisch Centrum Groningen
Groningen, 9713 GZ, Netherlands
Martini Ziekenhuis
Groningen, 9728 NT, Netherlands
Universitair Medisch Centrum Utrecht
Utrecht, 3584 CX, Netherlands
Related Publications (4)
Miura F, Okamoto K, Takada T, Strasberg SM, Asbun HJ, Pitt HA, Gomi H, Solomkin JS, Schlossberg D, Han HS, Kim MH, Hwang TL, Chen MF, Huang WS, Kiriyama S, Itoi T, Garden OJ, Liau KH, Horiguchi A, Liu KH, Su CH, Gouma DJ, Belli G, Dervenis C, Jagannath P, Chan ACW, Lau WY, Endo I, Suzuki K, Yoon YS, de Santibanes E, Gimenez ME, Jonas E, Singh H, Honda G, Asai K, Mori Y, Wada K, Higuchi R, Watanabe M, Rikiyama T, Sata N, Kano N, Umezawa A, Mukai S, Tokumura H, Hata J, Kozaka K, Iwashita Y, Hibi T, Yokoe M, Kimura T, Kitano S, Inomata M, Hirata K, Sumiyama Y, Inui K, Yamamoto M. Tokyo Guidelines 2018: initial management of acute biliary infection and flowchart for acute cholangitis. J Hepatobiliary Pancreat Sci. 2018 Jan;25(1):31-40. doi: 10.1002/jhbp.509. Epub 2018 Jan 8.
PMID: 28941329BACKGROUNDSieswerda E, Bax HI, Hoogerwerf JJ, de Boer MGJ, Boermeester M, Bonten MJM, Dekker D, van Wijk RG, Juffermans NP, Kuindersma M, van der Linden PD, Melles DC, Pickkers P, Schouten JA, Rebel JR, van Zanten ARH, Prins JM, Wiersinga WJ. The 2021 Dutch Working Party on Antibiotic Policy (SWAB) guidelines for empirical antibacterial therapy of sepsis in adults. BMC Infect Dis. 2022 Aug 11;22(1):687. doi: 10.1186/s12879-022-07653-3.
PMID: 35953772BACKGROUNDHaal S, Wielenga MCB, Fockens P, Leseman CA, Ponsioen CY, van Soest EJ, van Wanrooij RLJ, Sieswerda E, Voermans RP. Antibiotic Therapy of 3 Days May Be Sufficient After Biliary Drainage for Acute Cholangitis: A Systematic Review. Dig Dis Sci. 2021 Dec;66(12):4128-4139. doi: 10.1007/s10620-020-06820-3. Epub 2021 Jan 19.
PMID: 33462749BACKGROUNDOverdevest AG, Sieswerda E, Haal S, Bogaards JA, Baven-Pronk MAMC, Bogte A, Boparai KS, Ter Borg F, Brink MA, van Delft F, Dik VK, Fockens P, Gilissen LPL, Hadithi M, Hazen WL, van der Heide F, den Hollander WJ, Inderson A, de Jonge PJF, Kuiken SD, Munneke JM, Perk LE, Poen AC, Poley JW, Quispel R, Scheffer RCH, Scholvinck DW, van Soest EJ, Tan ACITL, Thijs WJ, Venneman NG, Verdonk RC, van de Vrie W, Vrolijk JM, van Wanrooij RLJ, Weijenborg PW, Dijkgraaf MGW, Prins JM, Voermans RP. Antibiotic treatment for 1 day versus 4-7 days in patients with acute cholangitis after adequate endoscopic biliary drainage (COBRA): study protocol for a randomized controlled trial. Trials. 2026 Feb 14. doi: 10.1186/s13063-026-09524-7. Online ahead of print.
PMID: 41689066DERIVED
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Masking Details
- Patients and investigators will know in which group they are assigned.
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Principal Investigator
Study Record Dates
First Submitted
February 3, 2023
First Posted
March 2, 2023
Study Start
July 19, 2023
Primary Completion
March 1, 2026
Study Completion (Estimated)
September 1, 2026
Last Updated
February 5, 2026
Record last verified: 2026-02
Data Sharing
- IPD Sharing
- Will not share